KR100775335B1 - Apparatus for removng choke of mashes of screen mat - Google Patents

Abstract

The present invention relates to an apparatus for removing clogging of a mat of a screen mat, which automatically detects and removes a case where a pastor of a screen mat that separates iron ore and coke, which are raw materials used in an ironworks furnace, is formed by an ore.

The present invention relates to a screen device for transferring lump ore from the iron ore raw material storage hopper supplied from the iron ore raw material storage hopper to the iron ore basis weight hopper and transfer the spectroscopic ore to the iron ore spectroscopic conveying belt, a mobile screen mat formed with an extended pastoral portion, A fixed screen mat having a staggered extended pastoral part and fixedly mounted to the screen device to be positioned on an upper portion of the moving screen mat, elastic means installed at a lower portion of the moving screen mat, and an air cylinder for elevating the moving screen mat. It is configured by.

Iron ore raw material, screen, screen mat, pastoral

Description

Pastoral blockage removal device of screen mat {APPARATUS FOR REMOVNG CHOKE OF MASHES OF SCREEN MAT}

1 is a block diagram showing a facility for classifying ores and transporting ores in a blast furnace process.

2 is an overall perspective view showing a conventional screen device

3 is a perspective view of main parts of the conventional screen device of FIG. 3.

4 is a perspective view of a screen mat constituting a conventional screen device.

5A to 5D are perspective views of components constituting the blockage removing device according to the present invention.

Figure 6a is a perspective view of the main portion of the removal device according to the present invention.

Figure 6b is a perspective view of the main portion showing an operating state by the removal device of the present invention.

Figure 7a is a perspective view showing the installation state of the removal device according to the present invention.

Figure 7b is a perspective view showing an operating state by the removal device of the present invention.

<Description of Symbols for Major Parts of Drawings>

10 furnace 11 ore charging belt

12 gas 20 coke raw material storage hopper

21: coke raw material screen device 22: coke ore transfer belt                 

23: coke spectroscopic conveying belt 24: coke raw material basis weight hopper

30: iron ore raw material storage hopper 31: iron ore raw material screen device

32: iron ore transfer belt 33: iron ore spectroscopic transfer belt

34: iron ore spectroscopic return belt 35: iron ore basis weight hopper

36: basis weight hopper load cell 37: manual gate

38: spectral transfer chute 39: belt load cell

40: roller stand 41: belt roller

42: spectroscopy 43: lump ore

50: screen mat 51: screen mat pastoral part

52: screen drive motor 53: screen elastic means

54 screen cover 100 ore

110: moving screen mat 111: pastoral

112: guide bar 120: fixed screen mat

121: pastoral unit 122: support frame

123: through hole 130: elastic means

131: elastic means base 140: air cylinder

141: cylinder rod 142: air inlet

143: cylinder base 144: guide pusher

150: electric gate

The present invention relates to an apparatus for detecting and removing clogging of the wood mat of the screen mat, and particularly, when the wood mat part of the screen mat separating iron ore and coke, which is a raw material used in a steel mill, to an appropriate size, is blocked by the ore, The present invention relates to a clogging removal device for a pastoral portion of a screen mat.

In general, the facility for classifying ores in the blast furnace process and transporting the ore into the furnace, as shown in Figure 1, to screen the coke and iron ore used in the blast furnace 10 by a predetermined size, respectively, coke raw material screen device 21 and iron ore The raw material screen device 31 is provided below the coke raw material storage hopper 20 and the iron ore storage hopper 30, respectively.

Since the coke raw material screening device 21 and the iron ore raw material screening device 31 have the same configuration, the coke raw material screening device 21 will be described below briefly, and then the iron ore raw material screening device 31 will be described. .

The coke raw material is the coke ore having a large particle size selected by the coke raw material screen device 21 is transferred to the blast furnace 10 by the coke ore transfer belt 22, the spectroscopic ore is by the coke spectroscopic transfer belt 23 It is transferred to the storage hopper.

Meanwhile, the iron ore raw material is stored in the iron ore raw material storage hopper 30 as shown in the overall perspective view of the conventional screen device of FIG. 2 and the main part of the conventional screen device of FIG. It passes through 37) and falls to the top of the iron ore raw material screen (31).

At this time, the lump ore 43 having a large particle size that does not pass through the pastoral portion 51 of the screen mat 50 constituting the conventional screen device of FIG. 4 has an iron ore basis weight wave mounted with a load cell 36 for detecting a weight ( After it is stored in 35, it is introduced into the furnace 10 by the iron ore transfer belt 32.

And the spectroscopic stone 42 of a predetermined size or less passes through the pastoral part 51 of the screen mat 50, falls to the lower part of the spectral transfer chute 38, and the dropped spectroscopic stone 42 detects the weight of the load cell. The iron ore spectral transport belt 33 driven by the belt roller 41 of the roller stand 40 on which the 39 is mounted is transferred to the previous process and used again.

Particularly, the particle size selection of the iron ore raw material, that is, the separation of the lump ore 43 and the spectroscopic ore 42 will be described in more detail. The iron ore raw material stored in the iron ore raw material storage hopper 30 is discharged to the manual gate 37 opened. The upper surface of the screen mat 50, the screen mat 50 is driven by the eccentric screen drive motor 52, the iron ore raw material also flows on the screen mat 50 accordingly to the iron ore raw material It becomes possible to select with. At this time, the impact caused by the falling and flow of the iron ore raw material is alleviated by the elastic means 53 installed in the lower portion of the screen mat 50.

However, the ore is stuck in the pastoral section 51 during the continuous separation by the pastoral section 51 of the screen mat 50, which is introduced into the iron ore raw material screen device 31 due to the continuous operation characteristics of the furnace 10. In this case, the spectral ore 42 is included in the lump ore 43 a lot and the screen efficiency is lowered.                         

That is, a large amount of spectroscopic stones 42 which are not screened to an appropriate size required for the operation of the furnace 10 flows into the furnace 10, thereby deteriorating the air permeability of the gas 12 in the furnace 10, resulting in an operation obstacle. It is necessary to periodically remove the blockage of the pastoral part (51).

Conventionally, the iron ore raw material screen device 31 in the state in which the iron ore raw material is not closed while the manual gate 37 of the iron ore raw material storage hopper 30 is closed for the removal of the ore stuck to the pastoral part 51 of the screen mat 50. ) To remove the ore stuck on the pastoral part (51) by idling, and in severe cases has been used to replace the entire screen mat (50).

However, when using such a conventional method, there are the following problems.

First, if the screen mat 50 is idling the iron ore raw material screen device 31 in order to clean the pastoral part 51, the impact applied to the pastoral part 51 is weak, so that the rock stuck to the pastoral part 51 is not effectively removed. On the contrary, there is a problem of causing damage to the driving unit due to an unbalance of load applied to the iron ore raw material screen device 31 during idling for a long time.

Second, when the ore stuck on the pastoral portion 51 of the screen mat 50 is not properly removed, the screen mat 50 has to be replaced, and thus the cost thereof is required.

Third, since the operation time of replacing all the screen mat 50 takes a lot of time, the operation rate of the facility is reduced, there was a risk of safety accidents due to manual work in a narrow space.

The present invention has been invented to solve the problems in the prior art as described above, provided with an electric gate that prevents the iron ore raw material from entering the screen device when the ore is stuck to the pastoral portion of the screen mat to reduce the screen efficiency, In order to effectively remove the ore in the pastoral area, two screen mats with an extended pastoral area are doubled so that the pastoral part is staggered, one of the screen mats is fixed to the screen unit, and the other one is raised and lowered. The purpose of the present invention is to provide a pastoral blockage blocking device of the screen mat, in which the same role as the conventional screen mat is provided, and when the two screen mats are separated, the ore that is stuck through the expanded pasting part is removed.

Screen block removing device of the screen mat of the present invention for achieving the above object, screen ore of the iron ore raw material supplied from the iron ore raw material storage hopper transfers the iron ore to the iron ore basis weight hopper and the iron ore spectroscopic conveying belt A fixed screen mat fixed to a screen device to be positioned on an upper portion of the movable screen mat, the movable screen mat having an expanded pastoral part formed thereon, and an extended pastoral part intersected with the pastoral part; It characterized in that it comprises an elastic means, and the air cylinder for raising and lowering the moving screen mat.

In addition, the pastoral portion and the pastoral portion of the fixed screen mat of the mobile screen mat of the present invention is characterized in that it is formed four times larger than the area of the pastoral portion required for the screen work.

In addition, the moving screen mat of the present invention is characterized in that a guide bar protruding upwardly is attached to an upper surface near each corner of the rectangle and inserted into a through hole formed near each corner of the rectangular fixed screen mat.

In addition, the elastic means of the present invention is installed on the lower portion of the moving screen mat so that the moving screen mat is seated on the upper, the air cylinder is fixed to the screen device at the top and the guide pusher installed at the end of the cylinder rod is connected to the guide bar to move And raise and lower the screen mat.

In addition, the present invention compares the weight of the lump ore measured by the load cell installed in the iron ore basis weight hopper and the weight of the spectral ore measured by the load cell installed under the iron ore spectroscopic transport belt to measure the screen efficiency, according to the screen efficiency And a control unit for controlling the electric gate for opening and closing the iron ore raw material storage hopper outlet, and for controlling the operation of the air cylinder.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

6A and 6B, the present invention relates to a fixed screen mat having a movable screen mat 110 having an extended pastoral part 111 and an extended pastoral part 121 alternately formed with the pastoral part 111. 120, an elastic means 130 installed below the moving screen mat 110, an air cylinder 140 for raising and lowering the moving screen mat 110, a screen efficiency, and an electric gate 150. ) And a control unit for controlling the operation of the air cylinder 140, each component will be described below.

First, as illustrated in FIG. 5A, the movable screen mat 110 has a cylindrical guide bar 112 protruding upward from an upper surface near each corner thereof to penetrate the fixed screen mat 120 to be described later. It is inserted into the sphere 123.

At this time, the area of the pastoral part 111 of the movable screen mat 110 is formed to be four times the pastoral part 51 of the conventional screen mat 50.

Next, as shown in FIG. 5B, the fixing screen mat 120 has a through hole 123 formed at each corner thereof, so that guide bars 112 are installed at each corner of the moving screen mat 110. Inserted into and fixed to the screen device to be positioned on top of the moving screen mat (110).

And the area of the pastoral part 121 of the fixed screen mat 120 is formed to be four times the general pastoral part, similar to the mobile screen mat 110, but is formed to cross the pastoral part 111 of the mobile screen mat 110 is moved In a state of being in close contact with the screen mat 110, the area of the pastoral portion 51 is the same as that of the conventional pastoral portion 51.

In addition, the support screen 122 of the square having a height of more than the lifting distance of the moving screen mat 110 is attached to the circumference of the fixed screen mat 120, so that the moving screen mat 110 when moving up and down the moving screen mat 110 ) Is prevented from escaping.

Then, the elastic means 130 is made of a spring, as shown in Figure 5c, the upper end of the spring in contact with the lower surface of the position where the guide bar 112 of the moving screen mat 110 is installed, the moving screen mat It is fixed by the elastic means base 131 to support (110).

Next, the air cylinder 140, as shown in Figure 5d, the upper end is fixed by the cylinder base 143, the lower end of the cylinder rod 141, the guide bar of the moving screen mat 110 Guide bar pusher 144 is pressed to the 112, the driving of the air cylinder 140 is by the air inlet and outlet of the solenoid valve connected to the air inlet 142 formed on the outer periphery of the air cylinder 140, respectively .

When the guide pusher 144 of the air cylinder 140 configured as described above moves forward and descends, as shown in FIG. 6B, the moving screen mat 110 descends while the fixed screen mat 120 is fixed. Since the spring of the elastic means 130 is compressed, the gap between the fixed screen mat 120 and the moving screen mat 110 is opened.

On the contrary, when the guide pusher 144 of the air cylinder 140 reverses and ascends, the moving screen mat 110 is lifted by the restoring force of the spring of the elastic means 130 to fix the fixed screen mat 120 and the moving screen mat 110. ) Gap is narrowed and close.

Finally, the control unit has a weight of the lump ore 43 measured by the load cell 36 mounted on the iron ore basis weight hopper 35 and the belt roller 40 of the roller stand 40 installed below the iron ore spectral transport belt 33. The screen efficiency is measured by comparing the weight of the spectroscopic ore 42 measured by the load cell 39 installed in the lower part, and the electric gate 150 installed at the outlet of the iron ore raw material storage hopper 30 when the screen efficiency is lowered. Closed to prevent the introduction of iron ore raw material.

In addition, the control unit controls the opening and closing of the solenoid valve for driving the air cylinder 140 and its timing.

Hereinafter, the operation of the present invention configured as described above will be described.

In the normal operation, as shown in FIG. 7A, when the electric gate 150 installed at the outlet of the iron ore raw material storage hopper 30 is opened and the stored iron ore raw material is introduced into the screen device, the screen device is the screen driving motor 52. The iron ore raw material is separated by a screen mat driven by a fixed screen mat 120 and a moving screen mat 110 up and down.

That is, the ore larger than the space in which the pastoral portion 121 of the fixed screen mat 120 and the pastoral portion 111 of the mobile screen mat 110 are alternately reduced is stored in the iron ore basis weight hopper 35, and conversely, Ore smaller than the space exits the pastoral portion 121. 111 and is transported to the iron ore spectroscopic conveying belt 33 through the spectroscopic conveying chute 38.

However, when the ore is caught in the pastoral parts 111 and 121, the ore which is to be passed through the pastoral parts 111 and 121 to be dropped into the iron ore basis weight hopper 35 together with the lump ore 43. While the amount is increased, the weight of the lump ore 43 by the basis weight hopper load cell 36 is largely detected, while the amount of the spectra ore 42 transferred to the iron ore spectral transport belt 33 is reduced to reduce the iron ore spectral transport belt ( The weight of the spectroscopic stones 42 by the belt load cell 39 provided below the 33 is detected small.

When such data is calculated by the weight detection controller and the screen efficiency drops below the set value, the electric gate 150 installed at the outlet of the iron ore raw material storage hopper 30 is closed to stop the ore discharge of the iron ore raw material storage hopper 30.                     

Since it takes a certain time to screen the iron ore raw material accumulated on the fixed screen mat 120 even after the ore discharge is stopped, after setting a predetermined time in a timer and the elapsed time, as shown in FIG. 7B, the solenoid When the valve is opened and air is supplied to the air cylinder 140, the cylinder rod 141 is lowered and the moving screen mat 110 supported by the elastic means 130 is lowered to fix the screen mat 120. The gap of the moving screen mat 110 is widened.

Therefore, the ore that is stuck on the screen mats 120 and 110 in close contact is the pastoral portion 121 and the moving screen mat 110 of the fixed screen mat 120 which is four times larger than the area of the pastoral portion 51 of the conventional screen mat 50. Passing through the pastoral portion 111 of the) and falling into the spectroscopic transfer chute 38, clogging of the pastoral portions (111, 121) is removed.

Next, when the solenoid valve closes after a predetermined time set in the timer to shut off the air supplied to the air cylinder 140, as illustrated in FIG. 7A, the cylinder rod 141 pushing the moving screen mat 110 downward. ), The contracted elastic means 130 is expanded and restored, and the movable screen mat 110 is lifted and brought into close contact with the fixed screen mat 120, so that the pastoral portions 111 and 121 are alternately formed. A state in which the same area as that of the pastoral part 51 of the mat 50 is achieved, and the screen device is operated again.

As described in detail above, using the wood block blocking device of the screen mat of the present invention, the control unit detects the blockage of ore stuck in the wood portion of the screen mat by the control unit to automatically stop the inflow of iron ore raw material gas ventilation of the furnace It is possible to extend the life of the furnace.

In addition, by effectively removing the ore in the pastoral area by only moving the moving screen mat up and down, the screen efficiency of iron ore raw materials can be improved in a short time during normal operation, and safety accidents are automated by automating the pastoral blockage work that was dependent on the conventional manual work. There is a significant effect that can be prevented.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

Claims (5)

In the screen device for transferring the ore of the iron ore raw material supplied from the iron ore raw material storage hopper to the iron ore basis weight hopper and the spectroscopic ore to the iron ore spectroscopic conveying belt, Fixed and installed on the screen device to be provided with a mobile screen mat 110, the expanded pastoral portion 111 is formed, and an extended pastoral portion 121 formed to be staggered with the pastoral portion 111 and positioned on the upper portion of the mobile screen mat 110. A screen mat 120, an elastic means 130 installed below the moving screen mat 110, and an air cylinder 140 configured to raise and lower the moving screen mat 110. Mat blockage removal device on the mat. According to claim 1, wherein the area of the pastoral part 111 of the mobile screen mat 110 and the pastoral part 121 of the fixed screen mat 120 is formed four times larger than the pastoral area required for the screen work of the screen mat Pastoral blockage removal device. According to claim 1, wherein the moving screen mat 110 is attached to the guide bar 112 protruding upwardly on the upper surface near each corner of the rectangle is attached near each corner of the rectangular fixed screen mat 120 Removing the clogging of the pastoral portion of the screen mat, characterized in that inserted into the through-hole 123 formed through. The method of claim 1, wherein the elastic means 130 is installed on the lower portion of the moving screen mat 110 so that the mobile screen mat 110 is seated on the top, the air cylinder 140 is fixed to the screen device the top Guide rod pusher (144) installed at the end of the cylinder rod (141) is connected to the guide bar 112 is configured to raise and lower the moving screen mat (110), the clogging block removal device of the screen mat. According to claim 1, wherein the weight of the ore 43 measured by the load cell 36 installed in the iron ore basis weight hopper 35 and the minute measured by the load cell 39 installed below the iron ore spectral transport belt 33 Measuring the screen efficiency by comparing the weight of the ore 42, controlling the electric gate 150 for opening and closing the iron ore raw material storage hopper 30 in accordance with the screen efficiency, and controls the operation of the air cylinder 140 The pastoral blockage blocking device of the screen mat, characterized in that further comprises a control unit.

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