JP2001348252A - Facilities for treating stainless steel slag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the treatment efficiency of stainless steel slag and to improve the recovering efficiency of slag powder. SOLUTION: A rotary cooler 7 classifies the supplied stainless steel slag to the slag powder, slag grains and slag lumps while cooling the slag by water cooling and air cooling. A slag powder recovering means 8 recovers the slag powder sucked by a suction fan 69. A slag grain recovering device 9 recovers the slag grains sieved down by the rotary cooler 7. A slag lump recovering means 10 recovers the slag lumps discharged from the rotary cooler 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for treating stainless steel slag, and more particularly, to the treatment of stainless steel slag that can be suitably used for recycling stainless steel slag generated during the production of stainless steel. Equipment related.

[0002]

2. Description of the Related Art A stainless steel slag generated in an electric furnace, a refining furnace outside a furnace, or the like has a slag transformation temperature of, for example, 5%.
It is known that spontaneous pulverization starts at about 00 to 600 ° C. and ends at 400 ° C. or lower. The stainless steel slag in a molten state is solidified by air cooling or water sprinkling in a slag processing plant, and then coarsely pulverized to be piled or landfilled. Since the stainless steel slag treated in this way becomes extremely powdery when cooled,
In order to prevent scattering of powdery stainless steel slag, wetting treatment by watering is indispensable. This wet treatment prevents scattering of the powdered stainless steel slag, but makes it difficult to recover the stainless steel (hereinafter referred to as ingot) contained in the stainless steel slag, and also removes the powdered stainless steel slag. It has also become difficult to reuse it as a cement raw material.

As prior art for solving the above-mentioned problems, Japanese Utility Model Publication No. 59-35548 and Japanese Patent Publication No.
No. 11006 is disclosed. In these prior arts, the slag is cooled by air or water spray,
The powdered slag and powdered metal are sieved from the powdered slag powdered by the vibrating sieve or the rotating drum, the granular metal, and the bricks and metal scraps remaining as a slag mass without being fragmented. Are being collected. The air and steam used for cooling are sucked into the dust collector.

[0004]

The slag powdered by cooling has an average particle size of about 30 .mu.m and is about 0.1 .mu.m.
It floats in a slight air current of about m / s. The former prior art, which relies on convective heat transfer by air for cooling, requires a large amount of air. This causes a problem that the powdered slag is scattered in the airflow, collected by the dust collector and treated as dust, and the recovery efficiency of the powdered slag sieved by the sieve is reduced.

[0005] In order to prevent scattering of powdered slag,
When a small amount of air is required for cooling, it takes a long time to cool and pulverize the slag, and the treatment efficiency is reduced. At the same time, the powdered slag and the unpulverized slag are sieved before the cooling and pulverization of the slag is sufficiently completed within the predetermined capacity, and the slag to be recovered as powder is recovered as particles and lumps. As a result, there is a problem that the collection efficiency of the powdered slag is reduced.

[0006] Further, the powdered slag and the unpulverized slag are sieved by a vibrating sieve. However, when a large amount of the powdered slag is supplied to the vibrating sieve, clogging of the vibrating sieve is likely to occur. There is a problem that the recovery efficiency of the waste is reduced.

Although the latter prior art is characterized by cooling by direct and indirect water, it is not as good as the former,
The powdered slag floats in the air stream that sucks the generated water vapor, and is similarly removed to the dust removal system. In order to reduce the carry-out amount, the amount of suction air is reduced, but the surrounding environment is deteriorated.

[0008] It is an object of the present invention to improve the processing efficiency of stainless steel slag, improve the efficiency of recovering slag powder, and treat stainless steel slag that can reliably recover slag powder, slag particles and slag lump. The provision of equipment.

[0009]

SUMMARY OF THE INVENTION The present invention provides a slag particle having a predetermined particle size range while cooling hot stainless steel slag by suction cooling air, and a slag powder having a smaller particle size than the slag particle. And, slag classification means for classifying into slag mass having a larger particle size than slag particles, slag powder collection means for collecting slag powder classified by slag classification means, and slag particles classified by slag classification means Slag particle collecting means for collecting, and slag mass collecting means for collecting the slag mass classified by the slag classifying means, the slag classifying means is formed in a substantially cylindrical shape, provided rotatably around its central axis. A rotating cylinder having a supply port through which the slag is supplied and a discharge port through which the classified slag mass is discharged, wherein the vertical cylinder including the central axis is provided. A rotating cylinder body provided with a lower side intersection line of two intersection lines formed by the rotation cylinder body and the inner peripheral surface of the rotation cylinder body, which is inclined downward from the supply port toward the discharge port with respect to a horizontal plane. A rotating drive means for rotating the rotating cylinder about its central axis, and a slag powder collecting means, connected to the rotating cylinder, cooling air being sucked into the rotating cylinder to cool the slag, Slag cooling means for pulverizing slag powder and cooling air out of the rotary cylinder, and a sieve provided on the discharge port side of the rotary cylinder and having a plurality of through-holes formed in the entire circumferential direction of the rotary cylinder. A slag means, wherein the inside diameter of the through-hole is set so that slag particles having a maximum particle size can pass therethrough.

According to the present invention, for example, the high-temperature stainless steel slag which has been solidified and crushed into a lump is supplied from a supply port of a rotary cylinder which is rotationally driven by a rotary drive means, and is provided downstream in the rotational direction of the rotary cylinder. It moves toward the discharge port while repeating rising and falling to the side, and is air-cooled by the cooling air sucked by the slag cooling means. The cooled stainless steel slag is pulverized from the surface and the floating action in the airflow is promoted, and is transported together with the air sucked by the slag cooling means and collected by the slag powder collecting means. The slag particles are sieved through a plurality of through holes of the sieving means by the rotation of the rotary cylinder, and are collected by the slag particle collecting means. The slag mass is discharged from the discharge port of the rotary cylinder and collected by the slag mass collection means. Thus, the stainless steel slag is classified by the slag classification means and separated and collected into slag powder, slag particles, and slag mass.

[0011] The stainless steel slag is cooled from its surface to a temperature lower than the slag transformation temperature by cooling air sucked by the slag cooling means, and can be suspended in an air current by being powdered. Further, the slag powder is sucked by the slag cooling means and collected by the slag powder collecting means, and the slag particles and the slag mass are sieved by the sieving means and collected by the slag particle collecting means and the slag mass collecting means, respectively. A large amount of slag powder is prevented from being introduced into each through-hole, and clogging of the sieving means can be prevented. Thus, the recovery efficiency of each component of the stainless steel slag can be improved.

Further, the present invention is characterized in that it includes a slag collecting means for collecting granular slag from slag particles.

According to the present invention, since the ingot, which is a valuable metal, can be recovered from the slag particles by the ingot recovery means, the stainless steel slag can be treated without waste.

Further, the present invention is characterized in that it comprises lifter means provided on the discharge port side of the rotary cylinder body with respect to the supply port, and protruding radially inward from the inner peripheral surface of the rotary cylinder body.

According to the present invention, the cooled stainless steel slag reaches the downstream lifter means while being powdered from the surface, and is moved to the lifter means by the circumferential movement of the lifter means accompanying the rotation of the rotary cylinder. After being scooped up, it falls from the lifter means. The stainless steel slag pulverized and fragmented by the impact at the time of falling increases the cooling efficiency and promotes natural pulverization and a floating action in the airflow.

After the stainless steel slag is scooped up by the lifter means, it is dropped from the lifter means and stirred, so that the cooling effect of the stainless steel slag is promoted by this stirring effect, and natural pulverization is promoted. At the same time, the stainless steel slag is forcibly pulverized and fragmented by the impact at the time of falling. By doing so, the cooling efficiency of the stainless steel slag can be improved, and the collection efficiency of slag powder and slag particles can be improved.

Further, the slag cooling means of the present invention is characterized in that cooling air is taken in from the supply port side of the rotary cylinder and is suctioned and exhausted from the discharge port side of the rotary cylinder.

According to the present invention, the cooling air sucked by the slag cooling means is taken in from the supply port side of the rotary cylinder, cools the slag and powders it, and discharges the rotary cylinder together with the slag powder. It is sucked and exhausted from the outlet side. That is, the cooling air flows along the traveling direction of the slag. Since the cooling air is taken in from the supply port side of the rotary cylinder in which the high-temperature slag exists, the high-temperature slag can be effectively cooled by the cooling air, and the slag can be efficiently powdered. Can be.

Further, the slag cooling means of the present invention takes in the cooling air from the discharge port side of the rotary cylinder, sucks and exhausts the cooling air from the supply port side of the rotary cylinder, and controls the flow of the cooling air with respect to the traveling direction of the slag. And a slag classification means and a slag powder collecting means, wherein a heat exchanger is provided between the slag classifying means and the slag powder collecting means for collecting waste heat from cooling air sucked and exhausted outside the rotary cylinder. Features.

According to the present invention, the cooling air is taken in from the outlet of the rotary cylinder by the slag cooling means. The taken-in cooling air moves from the supply port side to the discharge port side in the rotary cylinder. The stainless steel slag is cooled by countercurrent in the direction opposite to the direction of travel of the slag, powdered, and floated in the airflow, and the temperature of the slag powder and the slag rises due to convective heat transfer with the slag. It is sucked and exhausted from the supply port side as a high-temperature gas mixed with cooling air. The high-temperature gas is subjected to waste heat recovery by the heat exchanger, and is sucked and exhausted by the slag cooling means. Slag powder in the high-temperature gas is collected by slag powder collecting means. The heat recovered by the heat exchanger is used in district cooling and heating equipment.

As described above, the cooling air is taken in from the discharge port side of the rotary cylinder by the slag cooling means, cools the slag and is sucked from the supply port side, so that the cooling air flows from the low temperature side of the slag. The slag is cooled by the countercurrent flowing toward the high temperature side, and a large amount of heat is taken from the slag to increase the temperature. By recovering waste heat from the high-temperature cooling air by a heat exchanger, waste heat can be effectively used, and energy can be saved.

Further, the rotary cylinder of the present invention is characterized in that its inner diameter is formed so as to decrease in diameter from the supply port toward the discharge port.

According to the present invention, the amount of the stainless steel slag supplied to the slag classification means is reduced by the amount of the slag powder suspended in the air flow from the supply port to the discharge port of the rotary cylinder. Since the rotating cylinder is formed so that its inner diameter decreases from the supply port to the discharge port, the rotating cylinder corresponds to the amount of retained stainless steel slag that decreases from the supply port to the discharge port. Thus, the size of the configuration can be reduced, and the weight of the rotating cylinder can be reduced. Further, in the configuration of the present invention according to claim 2, the speed of the air sucked by the slag cooling means at the discharge port can be made higher than the speed at the supply port, so that the slag powder is easily floated and transported. Slag powder collection efficiency can be improved.

Further, the present invention further comprises an internal water cooling means which is inserted from a supply port of the rotary cylinder, sprays cooling water around the supply port of the rotary cylinder, and directly cools the slag. Features.

According to the present invention, the stainless steel slag supplied to the slag classification means is cooled by cooling water sprayed from the internal water cooling means. The sprayed cooling water removes the latent heat of vaporization from the stainless steel slag and directly cools the stainless steel slag.

Since the stainless steel slag is directly water-cooled by the internal water cooling means, the cooling of the stainless steel slag can be enhanced.

Further, the present invention is characterized by further comprising an external water cooling means provided near the supply port of the rotary cylinder and injecting cooling water to the outer peripheral surface of the rotary cylinder to indirectly cool the slag. And

According to the present invention, the stainless steel slag supplied to the slag classification means is cooled by the cooling water injected from the external water cooling means to the outer peripheral surface of the rotary cylinder. Cooling water injected from the external water cooling means to the outer peripheral surface of the rotating cylinder is
The peripheral wall near the supply port of the rotary cylinder is cooled to indirectly cool the stainless steel slag.

Since the stainless steel slag is indirectly water-cooled by the external water cooling means, the cooling of the stainless steel slag can be enhanced. Further, since the external water cooling means water-cools the rotatably driven rotary cylinder, it is possible to prevent local thermal deformation of the rotary cylinder and extend the life.

Further, according to the present invention, a plurality of damping blades are provided on the inner peripheral surface of the end portion on the discharge port side of the rotary cylinder so as to protrude radially inward at intervals in the circumferential direction. The blocking vane is provided so as to be inclined so as to be closer to the discharge port as it goes downstream in a predetermined rotation direction of the rotary cylinder.

According to the present invention, during the processing of the stainless steel slag, the rotary cylinder is driven to rotate in one predetermined rotation direction. Since the inclined surface facing the one rotation direction downstream side is inclined upward toward the one rotation direction downstream side of each damming blade, the slag mass is blocked by each damping blade. When discharging the blocked slag lump, the rotary cylinder is driven to rotate in the other rotation direction opposite to the one rotation direction. The slugs are discharged from the rotary cylinder because the inclined surface facing the downstream side in the other rotation direction is inclined downward toward the downstream side in the other rotation direction. In this way, the slag mass is intermittently discharged from the rotary cylinder.

Since a plurality of damping blades are provided on the inner peripheral surface of the end of the rotary cylinder at the discharge port side, it is possible to selectively switch between damming and discharging of the slag block depending on the rotation direction of the rotary cylinder. In addition, the slag mass can be discharged in the unit of processing stainless steel slag. Thereby, the slag lump can be efficiently transported. Furthermore, the residence time of the slag mass in the rotating cylinder can be increased, and powdering and granulation can be promoted, and the recovery efficiency can be improved.

Further, the slag powder collecting means of the present invention may further comprise:
A dust collecting means for collecting slag powder, and a plurality of storage means provided below the dust collecting means and storing the slag powder collected according to the type of stainless steel, characterized in that it comprises: 8. The stainless steel slag processing facility according to any one of 7 above.

According to the present invention, the slag powder collected by the dust collecting means is selectively stored in any storing means by, for example, a screw conveyor. For example, the slag powder stored in one storage unit is kneaded while being humidified by a humidifier and kneader, formed into a pellet shape, and then reused. The slag powder stored in the remaining storage means is reused as powder.

Since the slag powder collected by the dust collecting means is arbitrarily stored in the plurality of storing means, slag powder having different components depending on the type of stainless steel to be refined can be collected for each use.

Further, a gas temperature adjusting means is provided between the slag classification means and the slag powder collecting means of the present invention, and the gas temperature adjusting means measures the temperature of the gas sucked by the slag cooling means. The cooling water amount of the internal water cooling means is adjusted so that the temperature of the gas falls within a predetermined temperature range.

According to the present invention, the temperature of the gas sucked from the slag classification means to the slag powder collecting means by the slag cooling means is measured by the gas temperature adjusting means.
The gas temperature adjusting means adjusts the amount of cooling water of the internal water cooling means according to the measured gas temperature.

The temperature of the gas sucked from the slag classifying means to the slag powder collecting means is adjusted within a predetermined temperature range by adjusting the amount of cooling water of the internal water cooling means by the gas temperature adjusting means. It is possible to cope with the heat resistance of the bag filter and the condensation of gas.

Further, the present invention is characterized in that stainless steel slag is supplied to the slag classification means in a molten state.

According to the present invention, the stainless steel slag is:
The molten state is supplied to the slag classification means. The supplied molten stainless steel slag is cooled by the cooling means and solidified, and after the solidification is further cooled and classified into slag powder, slag particles and slag mass.

Since the stainless steel slag is supplied to the slag classification means in a molten state, the step of once solidifying the stainless steel slag, coarsely pulverizing the solidified stainless steel slag and supplying it to the slag classification means can be omitted. it can. Therefore, the processing efficiency of the stainless steel slag can be remarkably improved, the area of the slag processing plant can be reduced, and the space of the processing equipment can be reduced.

[0042]

FIG. 1 is a system diagram showing the configuration of a stainless steel slag processing facility 1 according to an embodiment of the present invention. The processing equipment 1 supplies a rotary cooler 7 as slag classification means for classifying the stainless steel slag into slag powder, slag particles, and slag lump while cooling the slag by water cooling and air cooling, and supplies slag to be classified to the rotary cooler 7. Slag supply device 3, slag powder collecting means 8 for collecting slag powder classified by rotary cooler 7,
A slag particle collection device 9 as slag particle collection means for collecting granular Ni and Cr (hereinafter, referred to as metal) from the slag particles classified by the rotary cooler 7, and a slag mass classified by the rotary cooler 7 are collected. And a slag lump collecting means 10. The particle size range of the slag particles in the present embodiment is 0.2 mm or more and 15 mm or less, the slag powder is a powder slag having an average of 30 μm, and the slag mass has a particle size larger than the upper limit particle size of the slag particles. It is a massive slag having.

The slag supply device 3 includes a charging hopper 4 into which coarsely pulverized slag is charged, an apron feeder 5 for horizontally transporting the slag charged into the charging hopper 4,
A bucket elevator 6 for vertically conveying the slag conveyed by the apron feeder 5.

FIG. 2 is a simplified front view showing the structure of the rotary cooler 7, and FIG. 3 is a longitudinal sectional view showing the structure of the rotary cooler 7 in a simplified manner. The rotary cooler 7
The rotary cooler main body 25 which is a rotary cylinder, a rotary driving means 26, a water cooling means 27, a plurality of lifters 28 which are lifter means, a rotary sieve 29 which is a sieve means, a plurality of dampers 30 and a slag cooling system And means 21.
The rotary cooler main body 25 is a substantially cylindrical steel cylindrical body, and is rotatably supported around its central axis L1.
The rotary cooler main body 25 has a supply port 31 through which the slag is supplied and a discharge port 32 through which the remaining lump slag is discharged, and the bottom part L2 of the bus bar extends downward from the supply port 31 toward the discharge port 32. It is provided at an angle. That is, the rotary cooler main body 25 is configured such that the lower side intersecting line L2 of the two intersecting lines formed by the vertical plane including the center axis L1 and the inner peripheral surface of the rotary cooler main body 25 is supplied to the horizontal plane. It is provided to be inclined downward from the port 31 toward the discharge port 32.

The rotation driving means 26 includes an electric motor 36,
It includes a speed reducer 37 for reducing the rotation speed of the electric motor 36, and a pinion 38 provided on the output shaft of the speed reducer 37 and meshing with a large gear 39 provided on the outer peripheral surface of the rotary cooler 25. Rotational movement by the electric motor 36
Is transmitted to the pinion 38 via the pinion 38 and transmitted to the large gear 39 via the pinion 38. Thereby, the rotary cooler main body 25 is driven to rotate about its central axis L1. The rotation speed of the rotary cooler main body 25 is, for example, 1 rpm.

The water cooling means 27 is a first water cooling means which is an internal water cooling means.
It comprises a water cooling means 53 and a second water cooling means 54 which is an external water cooling means, and comprises a spray pipe 41, an injection pipe 42,
It includes a valve 43, a second valve 44, a pump 45, and a cooling water source 46. The spray pipe 41 is inserted from the supply port 31 substantially coaxially with the central axis L1 of the rotary cooler main body 25, and has a plurality of nozzles 41a for spraying cooling water into the inside 47 near the supply port 31 of the rotary cooler main body 25. . The injection pipe 42 is provided facing the outer periphery near the supply port 31 of the rotary cooler main body 25,
The rotary cooler body 25 has a plurality of injection nozzles 42a for injecting cooling water to the outer peripheral surface. First valve 43
Is interposed in a conduit 48 connected to the base end of the spray pipe 41 and is driven by an electric motor 49. The second valve 44 is interposed in a pipe 50 connected to the injection pipe 42 and is driven by an electric motor 51. Pump 45
Is interposed in a pipe 59 provided between the connection point 52 of each of the pipes 48 and 50 and the cooling water source 46.

The cooling water pumped from the cooling water source 46 by the pump 45 is supplied to the spray pipe 41 through the respective pipe lines 59 and 48 and the first valve 43. The cooling water supplied to the spray pipe 41 is sprayed into the interior 47 through each nozzle 41a, and directly cools the slag. The cooling water pumped from the cooling water source 46 by the pump 45 is supplied to the injection pipe 42 through the respective pipe lines 59 and 50 and the second valve 44. The cooling water supplied to the injection pipe 42 is injected to the outer peripheral surface of the rotary cooler main body 25 via each injection nozzle 42a.

Here, the first water cooling means 53 is
1, a pipeline 48, a first valve 43, a pipeline 59, a pump 45, and a cooling water source 46. Second
The water cooling means 54 includes the injection pipe 42, the pipe 50, and the second
Valve 44, pipe 59, pump 45, cooling water source 4
6 is included.

The slag cooling means 21 includes a suction fan 69 and conduits 74 and 75. The suction fan 69 is connected to the rotary cooler main body 25 through a pipe 75, a filter dust collector 70, and a pipe 74 described later, takes in cooling air from the supply port 31 side of the rotary cooler main body 25, and discharges the rotary cooler main body 25. The gas in the rotary cooler 7 is sucked and exhausted from the outlet 32 side. The pipeline 74 connects the outlet 32 side of the rotary cooler main body 25 and the filter dust collector 70. The conduit 75 is connected to the upper part of the filter dust collector 70 and the suction fan 6.
9 is connected to the suction port 69a.

FIG. 4 is a sectional view taken along line IV-IV of FIG. The plurality of lifters 28 are steel plate-shaped members, and the rotary cooler body 25 is
And protrudes radially inward from the inner peripheral surface 25a of the rotary cooler body 25, and is provided at intervals in the circumferential direction and the axial direction. In the embodiment of the present invention, each lifter 28 is provided in the circumferential direction, for example, every angle θ4 = 45 °. Each lifter 28
Are provided in the axial direction, for example, every pitch L10 = 300 mm.

FIG. 5 is a sectional view taken along section line VV in FIG. The rotary sieve 29 is provided closer to the outlet 32 of the rotary cooler body 25 than the plurality of lifters 28 and over the entire circumference in the vicinity of the outlet 32 of the rotary cooler body 25 and has a plurality of through holes 56. The inner diameter D2 of each through hole 56 is set so that slag particles having the maximum particle size can pass through,
For example, it is 20 mm.

FIG. 6 is a side view showing the lower left portion of the rotary cooler 7 as viewed from the discharge port 32 when the rotary cooler body 25 is being driven to rotate in the normal rotation direction A which is a predetermined rotation direction. FIG. 7 is a sectional view taken along line VII- of FIG.
FIG. 8 is a cross-sectional view as viewed from the line VII. FIG. 8 shows a lower right portion of the rotary cooler 7 as viewed from the discharge port 32 when the rotary cooler main body 25 is rotationally driven in the reverse rotation direction B which is the other rotation direction. FIG. 9 is a side view, and FIG.
It is sectional drawing seen from X-IX. Multiple dampers 30
Are provided on the inner peripheral surface 25a of the end of the rotary cooler main body 25 on the side of the discharge port 32 so as to protrude radially inward at intervals from one another in the circumferential direction. In the embodiment of the present invention, each of the blocking blades 30 has a circumferential direction, for example, an angle θ1 = 10.
It is provided every °. Further, the plurality of damping blades 30 approach a virtual plane 58 including the discharge port 32 toward the downstream of the predetermined forward rotation direction A of the rotary cooler main body 25 and have a predetermined angle θ2 with respect to the virtual plane 58. ,
For example, it is provided at an angle of 45 °.

The area of the rotary cooler main body 25 where the water cooling means 27 is provided is called a water cooling area, the area of the rotary cooler main body 25 where the plurality of lifters 28 are provided is called the stirring air cooling area, and the rotary sieve 29 of the rotary cooler main body 25 is The area provided is referred to as a sieving area, and the area in the rotary cooler main body 25 where the plurality of blocking blades 30 are provided is referred to as a blocking area.

Here, as an example of the dimensions of the rotary cooler 7, the outer diameter D1 is, for example, 3 m, the axial length L5 is, for example, 16 m, and the water cooling area length L6 of the water cooling means 27 is, for example, 4 m, the length L7 of the stirring air cooling region by the plurality of lifters 28 is, for example, 8 m, the length L8 of the sieving region by the rotary screen 29 is, for example, 1 m, and the length of the blocking region by the plurality of blocking blades 30. The length L9 is, for example, 1 m.

Referring to FIG. 2, rotary cooler body 25
An inlet housing 61 is provided at a position facing the supply port 31 of the slag. The inlet housing 61 is provided with a slag supply pipe 60 and an air intake port 62 for taking in outside air. The slag supply pipe 60 transfers the stainless steel slag discharged from the chute 20 of the bucket elevator 6 to the rotary cooler body 2.
5 The area including the sieving area and the blocking area of the rotary cooler main body 25 is surrounded by the outlet housing 63. The rotary cooler main body 25 and the inlet housing 61 are provided in an airtight manner. Referring to FIG. 10, outlet housing 63 and rotary cooler main body 25 are slidably and airtightly connected via bush 64.

Referring to FIG. 1, slag powder collecting means 8 includes:
It is configured to include dust collecting means 65, first and second slag powder storage bins 66 and 67 as storage means, and a humidifying kneader 68. The dust collecting means 65 collects the slag powder classified by the rotary cooler 7 by suction of the suction fan 69. More specifically, the dust collecting means 65 is configured to include a filter dust collector 70 and a screw conveyor 71. The filtration dust collector 70 converts the slag powder from the gas sucked by the suction fan 69 into a plurality of bag filters 70a.
To capture and recover. The screw conveyor 71 is
Slag powder, which is provided below the hopper 70b of the filter dust collector 70 and is washed off from the bag filter 70a by backwashing and stored in the hopper 70b, is selectively conveyed to the first and second slag powder storage bins 66, 67. I do.

First and second slag powder storage bins 66, 6
Reference numeral 7 is provided below the screw conveyor 71, and stores collected slag powder. Rotary feeders 72 and 73 are provided below the first and second slag powder storage bins 66 and 67, respectively. Below the second slag powder storage bin 67, a humidifying kneader 68 for humidifying and mixing the stored slag powder is provided.

The outlet housing 63 and the filter / dust collector 70 are airtightly connected by a pipe 74. Line 74 is
A part thereof is inserted into the rotary cooler main body 25 from the outlet 32 thereof. Upper part of filtration dust collector 70 and suction fan 69
Is hermetically connected to a suction port 69a by a conduit 75. An outlet 69 b of the suction fan 69 is connected to the chimney 80. The suction fan 69 takes in the air from the air intake port 62 to enter the inlet housing 61 and the rotary cooler body 2.
5. The air is sucked through the outlet housing 63, the pipe 74, the filter dust collector 70 and the pipe 75, and the air sucked from the chimney 80 is discharged.

Referring to FIG. 1, slag particle collecting device 9 comprises:
It is configured to include a chute 76 and a belt conveyor 77. The chute 76 is provided at a lower portion of the outlet housing 63 and is arranged facing a sieving area of the rotary cooler main body 25. The belt conveyor 77 is provided below the chute 76 and conveys slag particles discharged from the chute 76. The magnetic separator 78, which is a metal collecting means, is interposed in the conveyance path of the belt conveyor 77, and has a magnetic force.
The base metal and the Ni base metal are selectively collected.

FIG. 10 is a cross-sectional view showing a simplified structure near the outlet housing 63. As shown in FIG. Slag lump collecting means 10
Includes a hopper 81 and a counter damper 82. The hopper 81 is provided below the outlet housing 63, and is arranged facing the discharge port 32 of the rotary cooler main body 25. The counter damper 82 is provided at a lower portion of the hopper 81, and is provided integrally with a damper 83 that is swingably provided to open and close a lower passage of the hopper 81 and a swing shaft 83a of the damper 83, and has a predetermined weight. Weight 8 with
4. In a natural state, the counter damper 82 closes the lower passage of the hopper 81 until the weight of the slag mass reaches a value balanced with the weight of the weight cone 84.

Next, the operation of the processing equipment 1 will be described. The stainless steel slag is processed according to the type of stainless steel. Solidified in slag processing plant, 100mm
The massive stainless steel slag roughly crushed back and forth is charged into the charging hopper 4 by the power shovel 90. The massive stainless steel slag stored in the charging hopper 4 is
It is conveyed by the apron feeder 5 and supplied to the boot 17 of the bucket elevator 6. The stainless steel slag supplied to the boot 17 is transported upward while being accommodated in a plurality of buckets (not shown), and is discharged from the chute 20. The massive stainless steel slag discharged from the chute 20 is supplied to the rotary cooler main body 25 via the slag supply pipe 60. At this time, the internal temperature of the massive stainless steel slag is, for example, about 800 ° C.

The massive stainless steel slag supplied to the rotary cooler main body 25 is turned into a massive stainless steel slag by the rotation of the rotary cooler main body 25 which is rotationally driven in the normal rotation direction (clockwise in FIG. 4) by the rotation driving means 26. Due to the friction between the rotary cooler main body 25 and the rotary cooler main body 25, the rotary cooler main body 25 is inclined and stored such that the downstream side in the forward rotation direction A is higher than the upstream side. The massive stainless steel slag that is stored in an inclined manner moves toward the discharge port 32 due to the inclination of the rotary cooler main body 25 while sliding down by the action of gravity. In this way, the massive stainless steel slag is repeatedly moved up and down toward the downstream in the rotation direction by the action of frictional force and gravity along the inclination of the rotary cooler body 25 while being discharged from the outlet 32.
Move towards.

Further, the massive stainless steel slag moving in this manner is subjected to a water cooling treatment in a water cooling region. In other words, this massive stainless steel slag
The cooling water sprayed from the spray pipe 41 and the spray pipe 4
2 and is cooled by the cooling water injected to the outer peripheral surface of the rotary cooler main body 25. The cooling water sprayed from the spray pipe 41 removes the latent heat of vaporization from the stainless steel slag and directly cools it. The cooling water injected from the injection pipe 42 to the rotary cooler main body 25 cools the peripheral wall in the water cooling area near the supply port 31 of the rotary cooler main body 25, and indirectly cools the stainless steel slag. As a result, the massive stainless steel slag is rapidly cooled and naturally powdered from the surface.

The massive stainless steel slag water-cooled in the water-cooling region is pulverized while being powdered, and is supplied to a plurality of lifters 2 on the downstream side.
When the rotary cooler body 25 reaches the stirring air cooling area, the lifter 28 is scooped up by each lifter 28 by the circumferential movement of the rotary cooler main body 25, and then falls from each lifter 28. This agitates the stainless steel slag. The dropped stainless steel slag is forcibly subdivided by the impact at the time of falling.

The finely divided and stirred massive stainless steel slag is efficiently cooled by air, and promotes natural powdering of the massive stainless steel slag. In this way, in the agitated air-cooling region of the rotary cooler main body 25, the massive stainless steel slag is classified into slag powder, slag particles, and slag mass, and the slag powder is sucked by the suction fan 69, and each of the filtration dust collectors 70 is separated. Collected in the bag filter 70a.

The slag particles and slag chunks remaining without floating in the airflow in the agitated air-cooling area of the rotary cooler main body 25 move to the sieving area and are sieved by the rotary sieve 29. The slag particles pass through the plurality of through holes 56 of the rotary sieve 29 and are sieved by the rotation of the rotary cooler main body 25, and are collected by the slag particle collecting device 9. That is, the slag particles sieved by the rotary sieve 29 are converted into chute 76.
Is supplied to the belt conveyor 77 via the. The slag particles supplied to the belt conveyor 77 are transferred to the belt conveyor 77.
While being conveyed, the magnetic separator 78 sorts out the Cr-based metal and the Ni-based metal.

The slag mass remaining in the sieving area is:
It moves in the direction approaching each damper blade 30 provided in the damming area. The slag mass moved to the dam area is shown in FIG.
As shown in FIG. 7 and FIG.
Is driven to rotate in the forward rotation direction A, and is guided to the inclined surface 91 facing the downstream side in the forward rotation direction A of each damper blade 30. Since the inclined surface 91 is inclined upward toward the discharge port 32, the slag mass is guided to the supply port 31 side and is blocked by each of the blocking blades 30. In this way, the slag mass is prevented from being discharged from the rotary cooler 7 during the processing of the stainless steel slag.

When the slag mass is discharged after the treatment of the stainless steel slag, as shown in FIGS. 8 and 9,
The rotary cooler main body 25 is rotationally driven in a reverse rotation direction B (counterclockwise direction in FIG. 8) which is a direction opposite to the normal rotation direction A. As a result, the slag mass that has moved to the blocking area is guided to the inclined surface 92 of each blocking blade 30 facing downstream in the reverse rotation direction B. Since the area surface 92 is inclined downward toward the discharge port 32, the slag mass is guided to the discharge port 32 side, and the rotary cooler main body 25 is rotated.
Is discharged from In this way, the slag mass is intermittently discharged from the rotary cooler main body 25.

As shown in FIG. 10, the slag mass discharged from rotary cooler 7 is stored in hopper 81. When a predetermined amount of the slag mass is stored in the hopper 81,
The counter damper 82 operates to open the lower passage of the hopper 81, and the slag mass is discharged from the hopper 81.

Referring to FIG. 1, slag powder floating in the air sucked by suction fan 69 is guided to filter dust collector 70 through conduit 74 inserted from discharge port 32 of rotary cooler main body 25. . The slag powder guided to the filtration dust collector 70 is captured by the bag filter 70a. The air from which the slag powder has been removed by the bag filter 70a is sucked into the suction fan 69 from the suction port 69a through the conduit 75 from above the filtration dust collector 70, and
b is discharged to the atmosphere via a chimney 80. The slag powder captured by the bag filter 70a is washed off from each bag filter 70a by backwashing as described above, and is stored and collected in a hopper 70b provided at a lower part of the filter dust collector 70. The slag powder stored in the hopper 70b is selectively supplied to the respective slag powder storage bins 66 and 67 by a screw conveyor 71 according to the type of stainless steel. The slag powder stored in the first slag powder storage bin 66 is supplied to a transport vehicle 93 such as a truck in a powdered state by a predetermined amount via a rotary feeder 72. The slag powder stored in the second slag powder storage bin 67 is supplied to the humidifying kneader 68 by a predetermined amount via the rotary feeder 73 and kneaded while being humidified at, for example, 10 to 20% by weight. Processed into pellets and discharged. In this way, the slag powder is recovered in a reusable manner for each purpose.

FIG. 11 is a system diagram showing a configuration of a main part of the stainless steel slag processing equipment 1. A conduit 96 is connected to the conduit 74 at a connection point 95. A cold air intake damper 98 driven by an electric motor 97 is interposed in the pipe 96. Suction fan 69 and chimney 80
Are connected by a conduit 99. A suction amount adjusting damper 1 driven by the electric motor 100 is provided in the pipe 99.
01 is interposed.

A gas temperature adjusting means 105 is provided in the conduit 74 between the connection point 95 and the filter / dust collector 70. The gas temperature adjusting means 105 includes a temperature sensor that measures the temperature of the gas sucked into the filter dust collector 70, and a control circuit that controls the driving of the electric motors 49 and 97 based on the output of the temperature sensor. Be composed. Therefore, the gas temperature adjusting means 105 measures the temperature of the gas sucked into the filter dust collector 70, and adjusts the amount of cooling water of the first water cooling means 53 so that the temperature falls within a predetermined temperature range, for example, 120 to 180 ° C. Then, the opening of the cold air intake damper 98 is adjusted to adjust the amount of cold air.

The specifications of the bag filter 70a used in the filter dust collector 70 are as shown in Table 1, for example.

[0074]

[Table 1]

The air sucked by the suction fan 69 passes through the inside of the rotary cooler 7 to float the slag powder. At this time, the flow rate of the gas composed of air containing the slag powder is about 4 m / s. When the gas flow rate is about 4 m / s, the equivalent suspended particle diameter of the slag powder is 400 μm.
It is about.

This gas is passed through line 74 to filter dust collector 7.
Aspirated to zero. The temperature of this gas is measured by the gas temperature adjusting means 105. If the temperature of the gas exceeds the upper limit of the predetermined temperature range, there is a problem that the filter cloth of the bag filter is damaged. When the temperature of the gas is lower than the lower limit of the predetermined temperature range, there is a problem that water vapor in the gas is condensed on the filter cloth and wets the filter cloth.
Therefore, when the gas temperature is out of the predetermined temperature range, the electric motor 49 of the first valve 43 is controlled by the gas temperature adjusting means 105 to increase or decrease the amount of cooling water supplied to the spray pipe 41.

Further, when the temperature of the gas exceeds the upper limit temperature, the drive of the electric motor 97 of the cold air intake damper 98 is controlled to open the cold air intake damper 98, and the cold air is supplied to the pipe 96.
The gas is supplied to the pipe 76 through the pipe to lower the temperature of the gas.

By adjusting the temperature of the gas in this way, it is possible to prevent trouble in the slag powder recovery system.

In such a stainless steel slag processing facility 1, if for example, 50 tons of stainless steel slag is processed, 38 tons can be recovered as slag powder, and 2 tons can be recovered as slag particles. 10
Tons can be recovered as slag mass.

The stainless steel slag is water-cooled by the water-cooling means 27 and is always air-cooled by the cooling air sucked in from the supply port 31 side by the suction fan 69 and sucked and exhausted from the discharge port 32 side. The slag can be cooled to a temperature below the slag transformation temperature and powdered in a short time. Further, since the stainless steel slag is scooped up by the plurality of lifters 28, then is dropped and stirred, the cooling effect of the stainless steel slag is promoted by this stirring effect, and natural pulverization is promoted. At the same time, the stainless steel slag is forcibly divided by the impact at the time of falling. By doing so, it is possible to improve the efficiency of cooling the stainless steel slag,
Recovery efficiency of slag powder and slag particles can be improved. Further, the slag powder is sucked by the suction fan 69 and collected by the slag powder collecting means 8, and the slag particles and the slag mass are sieved by the rotary sieve 29 and collected by the slag particle collecting device 9 and the slag mass collecting device 10, respectively. Therefore, it is possible to prevent a large amount of slag powder from being introduced into each through hole 56 of the rotary sieve 29, and to prevent the rotary sieve 29 from being clogged. In this way, the collection efficiency of slag powder can be improved, and slag powder, slag particles, and slag lump can be reliably collected.

Since the stainless steel slag is directly water-cooled by the first water cooling means 53, the cooling of the stainless steel slag can be enhanced. Further, since the second water cooling means 54 water-cools the rotary cooler main body 25 that is rotationally driven,
In addition to indirect cooling of the slag, local thermal deformation of the rotary cooler main body 25 can be prevented, and the life can be extended.

A plurality of blocking blades 30 are provided on the inner peripheral surface 25a of the end of the rotary cooler main body 25 on the side of the discharge port 32. Therefore, the blocking and discharging of the slag block are selectively performed according to the rotation direction of the rotary cooler main body 25. And the slag lump can be discharged in units of processing stainless steel slag. Thereby, the slag lump can be efficiently transported. Furthermore, the residence time of the slag mass in the rotary cooler main body 25 can be increased, powdering and granulation can be promoted, and the recovery efficiency can be improved.

Since the slag powder collected by the filter dust collector 70 is arbitrarily stored in each of the slag powder storage bins 66 and 67, slag powder having different components depending on the type of stainless steel to be refined can be collected for each application. Further, since the humidifying and kneading machine 68 is provided below the other slag and powder storage bin 67, it is not necessary to transport the slag to the humidifying and kneading equipment different from the processing equipment 1, and the slag and the like generated at the time of the transportation are scattered. Of the environment can be prevented, and a slag product suitable for reuse can be easily manufactured.

Since the temperature of the gas sucked from the rotary cooler 7 to the filter dust collector 70 is adjusted to a predetermined temperature by adjusting the amount of cooling water of the first water cooling means 53 by the gas temperature adjusting means 105, the temperature of the stainless steel slag is adjusted. Thus, powdering of the stainless steel slag can be promoted, and the temperature can be easily adjusted to a temperature suitable for the operating conditions of the filter dust collector 70.

FIG. 12 is a longitudinal sectional view showing a simplified configuration of a rotary cooler 110 provided in a stainless steel slag processing facility according to still another embodiment of the present invention. In the embodiment of the present invention, portions corresponding to the configuration of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The rotary cooler 110 is similar to the configuration of the rotary cooler 7 shown in FIGS. 1 to 11, and it should be noted that the inner diameter of the rotary cooler body 111 is changed from the supply port 31 to the discharge port 32.
Is formed so as to decrease in diameter as going toward.
That is, the rotary cooler main body 111 is formed in a tapered shape. The stainless steel slag supplied to the rotary cooler 110 is powdered while moving from the supply port 31 to the discharge port 32 of the rotary cooler main body 111, and the slag powder floats in the cooling air sucked by the suction fan 69. Then, it is collected by the slag powder collecting means 8. As a result, the amount of stainless steel slag is reduced
Decreases from the supply port 31 toward the discharge port 32 by the amount of the recovered slag powder. Therefore, by forming the rotary cooler main body 111 in a tapered shape, the rotary cooler main body 111 is moved from the supply port 31 to the discharge port 32.
Can be configured so as to correspond to the amount of stainless steel slag that decreases as it goes toward, and the size of the configuration can be reduced. At the same time, the rotary cooler body 11
1 can be reduced in weight. In addition, suction fan 6
The speed of the cooling air sucked by the outlet 9 at the outlet 32 can be made higher than the speed at the supply port 31, so that the slag powder can be easily floated and transported, and the slag powder recovery efficiency can be improved. Can be achieved.

In the above-described embodiment of the present invention, the rotary coolers 7, 110 are supplied with coarsely-pulverized stainless steel slag, but as still another embodiment of the present invention, the rotary cooler is in a state where the stainless steel slag is in a molten state. 7,
110. The stainless steel slag supplied to the rotary coolers 7 and 110 in the molten state is cooled by the water cooling means 27 and solidified. Thereafter, the solidified stainless steel slag is further cooled, classified into slag powder, slag particles, and slag lump, and recovered by the slag powder recovery means 8, the slag particle recovery device 9, and the slag lump recovery means 10, respectively. As described above, since the stainless steel slag is supplied to the rotary coolers 7 and 110 in a molten state, a step of once solidifying the stainless steel slag and then supplying the solidified stainless steel slag to the rotary coolers 7 and 110 can be omitted. Thus, the processing efficiency of stainless steel slag can be significantly improved, the area of the slag processing plant can be reduced, and the space of the processing equipment can be reduced.

FIG. 13 is a system diagram showing a configuration of a main part of a stainless steel slag processing facility 120 according to still another embodiment of the present invention. In the embodiment of the present invention, portions corresponding to the configuration of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The stainless steel slag processing equipment 120 is similar to the configuration of the stainless steel slag processing equipment 1 shown in FIGS.
The slag cooling means 130 differs from the slag cooling means 21 shown in FIG. 1 in that one end of the pipe 125 is connected to the supply port 31 side of the rotary cooler main body 25, and the rotary cooler 7 and the slag powder collecting means 121 Filter dust collector 7
The point is that a waste heat boiler 122 which is a heat exchanger is provided between the waste heat boiler 122 and the heat exchanger. The slag powder collecting means 121 is shown in FIGS.
In the configuration of the slag powder collecting means 8 of the embodiment shown in FIG.
Further, the configuration is such that a hot cyclone 123 and a cooler 124 for fine powder are added.

The hot cyclone 123 is connected to the inlet housing on the side of the supply port 31 of the rotary cooler 7 by a pipe line 125, and is subjected to centrifugal dust collection from a high-temperature gas in which high-temperature cooling air after slag cooling and slag powder are mixed. Collect slag powder in gas. The cooler 124 for fine powder temporarily stores and cools the slag powder collected by the hot cyclone 123. The cooler 124 for fine powder is connected to each of the bins 66 and 67 by a transport path 126.

The waste heat boiler 122 includes the hot cyclone 1
23 is provided downstream of the gas flow direction with respect to the gas flow direction.
7 is connected to the hot cyclone 123. Further, the waste heat boiler 122 is connected to the filter dust collector 70 provided on the downstream side in the gas flowing direction by the pipe 128. Further, the waste heat boiler 122 is connected to each of the bins 66 and 67 by a transport path 129.

When the suction fan 69 is driven, cooling air is taken in from the outlet 32 side of the rotary cooler main body 25.
This cooling air cools and powders the slag moving from the supply port 31 side toward the discharge port 32 side by a countercurrent in a direction opposite to the direction of travel of the slag.
Suspended slag powder in air stream. The high-temperature gas obtained by mixing the high-temperature cooling air after the slag cooling and the slag powder is supplied from the supply port 31 side of the rotary cooler body 25 to the suction fan 6.
Suction and exhaust are performed at 9. That is, the cooling air cools the slag from the low temperature side to the high temperature side of the slag. The temperature of the gas near the supply port 31 is about 600 ° C. The flow velocity of the gas near the outlet 32 of the rotary cooler body 25 is about 0.2 m / s, and the flow velocity of the gas near the supply port 31 is about 0.6 m / s.

The high-temperature gas sucked from the supply port 31 of the rotary cooler main body 25 is led to the hot cyclone 123 via the pipe 125. Most of the slag powder collected by centrifugal dust collection in the hot cyclone 123 is temporarily stored in the fine powder cooler 124, cooled, and stored in the bins 66, 67 via the transport path 126. The high-temperature cooling air from which most of the slag powder has been removed by the hot cyclone 123 is supplied to the waste heat boiler 1 through a pipe 127.
It is led to 22. In the waste heat boiler 122, waste heat recovery for recovering waste heat from high-temperature cooling air is performed. At this time, the slag powder collected by gravity dust collection in the waste heat boiler 122 is stored in the bins 66 and 67 via the transport path 129. The heat recovered by the waste heat boiler 122 is used in a district cooling / heating facility or the like.

The cooling air after the recovery of waste heat is guided to the filter dust collector 70 via the pipe 128, and after collecting slag powder by a plurality of bag filters, the cooling air is guided to the chimney 80 via the suction fan 69, and the air Released. The slag powder collected in each bag filter is stored in each of the bins 66 and 67 in the same manner as in the embodiment shown in FIGS.

As described above, the cooling air is taken in from the outlet 32 side of the rotary cooler main body 25, cools the slag, and is sucked and exhausted from the supply port 31 side. The slag is cooled toward the side, and a large amount of heat is taken from the slag to increase the temperature. By recovering waste heat from the high-temperature cooling air by the waste heat boiler 122, effective use of waste heat can be realized and energy can be saved.

In the above-described embodiment of the present invention, the rotary coolers 7, 110 are provided with both the first water cooling means 53 and the second water cooling means 54. However, the present invention is not limited to this. First water cooling means 53 and second water cooling means 5
4 may be provided, or both the first and second water cooling means 53 and 54 may not be provided. With this configuration, the configuration can be simplified, and the configuration can be suitably applied to a small-scale plant.

In the above-described embodiment of the present invention, the plurality of lifters 28 are provided at intervals from each other in the axial direction. Alternatively, the plurality of lifters 28 may be provided over the entire length of the stirring air cooling area. With this configuration, the lifter's forced crushing ability against the stainless steel slag is improved, and the cooling rate of the stainless steel slag can be increased. Further, if the rotary coolers 7, 110 are sufficiently long, the plurality of lifters 28 may not be provided.

In the embodiment of the present invention shown in FIG. 12, the plurality of lifters 28 are provided so as to protrude inward in the radial direction by the same length.
, The amount of protrusion may be reduced. With this configuration, the weight of the rotary cooler 110 can be further reduced.

In the embodiment of the present invention, the processing equipment 1 and 120 are provided with the magnetic separator 78 as the slag collecting means, but need not be provided.

[0098]

According to the present invention, the stainless steel slag is taken in from the supply port side by the slag cooling means, and is cooled from the surface to the slag transformation temperature by the cooling air sucked from the discharge port side. By cooling and pulverizing, it can be suspended in an air stream.

The slag powder is sucked by the slag cooling means and collected by the slag powder collecting means, and the slag particles and the slag mass are sieved by the sieving means and collected by the slag particle collecting means and the slag mass collecting means, respectively. ,
A large amount of slag powder is prevented from being introduced into each through hole of the sieving means, and clogging of the sieving means can be prevented.

According to the second aspect of the present invention, since the ingot, which is a valuable metal, is collected from the slag particles by the ingot collecting means, the stainless steel slag can be treated without waste.

According to the third aspect of the present invention, since the stainless steel slag is stirred by the lifter means, cooling of the stainless steel slag is promoted, natural powdering is promoted, and the stainless steel slag is forced by a drop impact. It is possible to improve the cooling efficiency of the stainless steel slag and improve the efficiency of collecting the slag powder and the slag granules.

According to the present invention, the cooling air is taken in from the supply port side of the rotary cylinder and is suctioned and exhausted from the discharge port side, so that the cooling air flows along the traveling direction of the slag. In addition, the high-temperature slag can be effectively cooled by the cooling air, and the slag can be efficiently powdered.

According to the fifth aspect of the present invention, the cooling air is taken in from the discharge port side of the rotary cylinder, sucked from the supply port side, and waste heat is recovered by the heat exchanger. A lot of heat can be taken, and energy can be saved by recovering waste heat.

According to the sixth aspect of the present invention, since the rotary cylinder is formed so that its inner diameter decreases from the supply port toward the discharge port, the rotary cylinder is discharged from the supply port. It is possible to configure so as to correspond to the amount of retained stainless steel slag decreasing toward the outlet, so that the configuration can be reduced in size and the weight of the rotating cylinder can be reduced. In particular, in the configuration of the present invention, the speed of the air sucked by the slag cooling means at the discharge port can be made higher than the speed at the supply port, so that the slag powder is easily floated and transported. Slag powder collection efficiency can be improved.

According to the seventh and eighth aspects of the present invention,
Since the stainless steel slag is directly or indirectly water-cooled by the internal or external water cooling means, the cooling of the stainless steel slag can be enhanced. Further, according to the present invention, since the rotating cylinder driven by rotation is water-cooled, the slag is indirectly cooled and local thermal deformation of the rotating cylinder can be prevented, and the life can be extended. Can be achieved.

According to the ninth aspect of the present invention, since a plurality of damping blades are provided on the inner peripheral surface of the end of the rotary cylinder at the discharge port side, the weir of the slag block depends on the rotation direction of the rotary cylinder. Stopping and discharging can be selectively switched, and the slag mass can be discharged in a processing unit of stainless steel slag. Thereby, the slag lump can be efficiently transported.

According to the tenth aspect of the present invention, the slag powder collected by the dust collecting means is arbitrarily stored in the plurality of storing means. Recovery can be performed.

According to the present invention, the temperature of the gas sucked by the slag cooling means from the slag classification means to the slag powder collecting means is determined in advance by adjusting the amount of cooling water in the internal water cooling means by the gas temperature adjusting means. Since the temperature is adjusted within the temperature range, it is possible to cope with the heat resistance of the bag filter and the dew condensation of the gas used as dust collecting means.

According to the twelfth aspect of the present invention, since the stainless steel slag is supplied to the slag classification means in a molten state, the stainless steel slag is once solidified, and then the solidified stainless steel slag is roughly pulverized. The step of supplying to the slag classification means can be omitted. Therefore, the processing efficiency of the stainless steel slag can be remarkably improved, the area of the slag processing plant can be reduced, and the space of the processing equipment can be reduced.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a configuration of a stainless steel slag processing facility 1 according to an embodiment of the present invention.

FIG. 2 is a simplified front view showing the configuration of the rotary cooler 7;

FIG. 3 is a longitudinal sectional view showing a simplified configuration of a rotary cooler 7;

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3;

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 3;

FIG. 6 is a side view showing a lower left portion of the rotary cooler 7 as viewed from the discharge port 32 when the rotary cooler main body 25 is rotationally driven in the normal rotation direction A.

FIG. 7 is a sectional view taken along section line VII-VII in FIG. 6;

FIG. 8 is a side view showing the lower right portion of the rotary cooler 7 as viewed from the outlet 32 when the rotary cooler main body 25 is rotationally driven in the reverse rotation direction B.

FIG. 9 is a cross-sectional view as viewed from the section line IX-IX of FIG. 8;

FIG. 10 is a simplified cross-sectional view showing a configuration near an outlet housing 63.

FIG. 11 is a system diagram showing a configuration of a main part of a stainless steel slag processing facility 1.

FIG. 12 is a longitudinal sectional view showing a simplified configuration of a rotary cooler 110 provided in a stainless steel slag processing facility according to another embodiment of the present invention.

FIG. 13 is a system diagram showing a configuration of a main part of a stainless steel slag processing facility 120 according to still another embodiment of the present invention.

[Explanation of symbols]

 1,120 Stainless steel slag processing equipment 3 Slag supply device 7,110 Rotary cooler 8,121 Slag powder collecting means 9 Slag particle collecting device 10 Slag lump collecting means 21,130 Slag cooling means 25,111 Rotary cooler main body 26 Rotary drive Means 27 Water cooling means 28 Lifter 29 Rotating sieve 30 Dam blade 31 Supply port 32 Discharge port 41 Spray pipe 42 Injection pipe 43 First valve 44 Second valve 45 Pump 46 Cooling water source 53 First water cooling means 54 Second water cooling means 56 Permeability Hole 65 Dust collecting means 66, 67 Slag powder storage bin 68 Humidifying kneader 69 Suction fan 70 Filtration dust collector 70a Bag filter 71 Screw conveyor 76 Chute 77 Belt conveyor 78 Magnetic separator 81 Hopper 82 Counter damper 105 Gas temperature adjusting means 122 Waste heat Ira 123 hot cyclone 124 fine powder for cooler

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B07B 4/00 B07B 4/00 Z 4K014 C04B 5/00 C04B 5/00 B C21C 5/28 C21C 5/28 D 5/54 5/54 7/00 7/00 J // C22B 7/04 C22B 7/04 A (72) Inventor Masami Suenaga 3-1-1 Higashikawasakicho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside the Kobe Plant (72) Inventor Hiroki Nomoto 3-1-1, Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. Kobe Plant F-term (reference) 4D021 AA15 AA16 CA12 CB03 CB09 DA01 DA11 DA13 DA20 DB02 DB20 EA05 EA10 FA14 GA14 GA29 GB01 GB03 HA01 HA10 4G012 JB02 JB03 JC02 JK05 JK08 4K001 AA10 BA12 CA01 CA02 CA49 4K002 AA03 AA04 AE07 4K013 CF01 4K014 CA04 CE01

Claims (12)

[Claims] 1. A slag particle having a predetermined particle size range while cooling a high-temperature stainless steel slag by cooling air to be sucked, a slag powder having a particle size smaller than the slag particle, and a particle larger than the slag particle. Slag classification means for classifying into a slag mass having a diameter, slag powder collection means for collecting slag powder classified by the slag classification means, and slag particle collection means for collecting slag particles classified by the slag classification means, A slag mass collecting means for collecting the slag mass classified by the slag classifying means, wherein the slag classifying means is formed in a substantially cylindrical shape, is provided rotatably around its central axis, and is supplied with the slag. A rotary cylinder having a supply port and a discharge port from which the classified slag mass is discharged, wherein a vertical surface including the central axis and an inner peripheral surface of the rotary cylinder are provided. Of the two intersection lines formed by the above, the lower side intersection line is provided to be inclined downward from the supply port toward the discharge port with respect to the horizontal plane, and the rotation cylinder body around the center axis A rotation driving means for rotating and driving, a slag powder collecting means, connected to the rotary cylinder, cooling air is sucked into the rotation cylinder to cool the slag, and the slag is powdered to form slag powder and cooling air. Slag cooling means for sucking and exhausting the outside of the rotary cylinder, and sieving means provided on the discharge port side of the rotary cylinder and having a plurality of through-holes formed in the entire circumferential direction of the rotary cylinder, wherein the inner diameter of the through-hole is And a sieve means set so that slag particles having a maximum particle size can pass therethrough. 2. The stainless steel slag processing facility according to claim 1, further comprising a slag collecting means for collecting granular slag from the slag particles. 3. A lifter means which is provided closer to a discharge port than a supply port of the rotary cylinder and protrudes radially inward from an inner peripheral surface of the rotary cylinder.
The described stainless steel slag processing equipment. 4. The slag cooling means according to claim 1, wherein the cooling air is taken in from a supply port side of the rotary cylinder and sucked and exhausted from a discharge port side of the rotary cylinder. 2. A stainless steel slag processing facility according to item 1. 5. The slag cooling means takes in cooling air from a discharge port side of the rotary cylinder, sucks and exhausts the cooling air from a supply port side of the rotary cylinder, and directs a flow of the cooling air in a traveling direction of the slag. The slag classification means and the slag powder recovery means are formed between the slag classification means and the slag powder recovery means, wherein a heat exchanger for recovering waste heat from cooling air sucked and exhausted outside the rotary cylinder is provided. Claim 1
The processing equipment for stainless steel slag according to any one of claims 3 to 3. 6. The rotating cylindrical body according to claim 1, wherein an inner diameter of the rotating cylindrical body is reduced from the supply port toward the discharge port. Processing equipment for stainless steel slag. 7. An internal water cooling means which is inserted from a supply port of the rotary cylinder, sprays cooling water into the vicinity of the supply port of the rotary cylinder, and directly cools the slag. A facility for treating stainless steel slag according to any one of claims 1 to 6. 8. The rotary cylinder is provided near a supply port thereof,
The stainless steel slag treatment according to any one of claims 1 to 7, further comprising an external water cooling unit that injects cooling water to an outer peripheral surface of the rotary cylinder to indirectly cool the slag. Facility. 9. An inner peripheral surface at an end of the rotary cylinder at a discharge port side,
A plurality of blocking blades are provided that protrude radially inward at intervals from one another in the circumferential direction, and each blocking blade approaches the discharge port as it goes downstream in a predetermined rotation direction of the rotary cylinder. The stainless steel slag processing facility according to any one of claims 1 to 8, wherein the facility is provided so as to be inclined. 10. The slag powder collecting means, comprising: dust collecting means for collecting slag powder; and a plurality of storage means provided below the dust collecting means for storing slag powder collected according to the type of stainless steel. The stainless steel slag processing facility according to any one of claims 1 to 9, comprising: 11. A gas temperature adjusting means is provided between the slag classification means and the slag powder collecting means, wherein the gas temperature adjusting means measures a temperature of a gas sucked into the slag cooling means, The stainless steel slag processing facility according to any one of claims 7 to 10, wherein a cooling water amount of the internal water cooling means is adjusted so that a temperature of the gas is within a predetermined temperature range. 12. The stainless steel slag processing equipment according to claim 1, wherein the stainless steel slag is supplied to the slag classification means in a molten state.