CN115522001A - Dry treatment method for stainless steel slag - Google Patents
Dry treatment method for stainless steel slag Download PDFInfo
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- CN115522001A CN115522001A CN202211236920.4A CN202211236920A CN115522001A CN 115522001 A CN115522001 A CN 115522001A CN 202211236920 A CN202211236920 A CN 202211236920A CN 115522001 A CN115522001 A CN 115522001A
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- steel slag
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- 239000002893 slag Substances 0.000 title claims abstract description 120
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 42
- 239000010935 stainless steel Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 80
- 239000010959 steel Substances 0.000 claims abstract description 80
- 239000000843 powder Substances 0.000 claims abstract description 37
- 239000000428 dust Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000003672 processing method Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000002918 waste heat Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000012634 fragment Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000009704 powder extrusion Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000004568 cement Substances 0.000 abstract description 4
- 239000004567 concrete Substances 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 239000011384 asphalt concrete Substances 0.000 abstract description 3
- 238000006477 desulfuration reaction Methods 0.000 abstract description 3
- 230000023556 desulfurization Effects 0.000 abstract description 3
- -1 desulfurization Substances 0.000 abstract description 3
- 239000004570 mortar (masonry) Substances 0.000 abstract description 3
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 239000004575 stone Substances 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000035939 shock Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/34—Passing gas through crushing or disintegrating zone gas being recirculated to crushing or disintegrating zone
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Food Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a dry processing method of stainless steel slag, which comprises the following specific operation steps: thermal crushing, phase change is completed in a dry cooling machine, steel slag is crushed through a rod mill, the crushed steel slag is sent into a roller press to be extruded to form a material cake, the material cake is fed into a winnowing machine through a lifting machine, metal in the stainless steel slag is recycled through winnowing, meanwhile, first steel slag powder is obtained, the material cake is separated through an airflow classifier, the separated coarse powder returns to the roller press to be extruded again, the separated fine powder is fed into a ball mill to be ground, and the ground material is discharged to obtain second steel slag powder; by the stainless steel slag dry treatment method, the drying in a workshop is ensured, the dust remover is not influenced, wastewater and slurry are not generated, meanwhile, the obtained product comprises metal in the stainless steel slag and second steel slag powder, and the second steel slag powder is applied to cement and concrete to replace a cementing material, asphalt concrete to replace stone powder, desulfurization, acid water neutralization and mortar.
Description
Technical Field
The invention relates to the technical field of stainless steel slag treatment, in particular to a dry treatment method for stainless steel slag.
Background
The steel slag is a byproduct discharged in steel-making production of steel enterprises, and how to effectively recycle steel scraps from the steel slag and utilize the steel slag with high value is an important subject faced by the steel enterprises; at present, most steel slag produced by steel enterprises is not utilized with high value, and steel slag stacking not only occupies land, clogs ditches and streams, pollutes water systems and influences the environmental quality, but also is huge waste of steel slag resources and influences the economic benefits of the enterprises.
Therefore, the treatment and utilization process of the steel slag is brought into the steel-making production link, the residual steel in the steel slag is fully recovered, the quality of the steel slag is ensured so as to further utilize the steel slag with high value, the environment of a plant area is improved, the occupied area of slag discharge is reduced, the clean production and the civilized factory are realized, the economic benefit of enterprises is increased, and the method is an important work content for the construction and the development of steel enterprises.
At present, the method for treating the stainless steel slag at home and abroad is a wet method, the production environment of the treatment method is very poor, all workshops are of closed structures, water vapor in the workshops cannot be dissipated, and the mist soaks. In the treatment process, because the stainless steel slag contains water, a common dust collector is pasted with a cloth bag, and the dust cannot be collected normally; the production environment is dirty, a large amount of sewage and slurry are generated, and the tailings cannot be comprehensively utilized.
Disclosure of Invention
The invention aims to provide a dry treatment method for stainless steel slag, which solves the problems that the production environment of the treatment method is poor, a workshop is of a closed structure, water vapor in the workshop cannot be dissipated, and mist soaks; the treatment process can not normally collect dust because the stainless steel slag contains water and a common dust collector is pasted with a cloth bag.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dry treatment method of stainless steel slag comprises the following specific operation steps:
the method comprises the following steps: and (3) thermal crushing, namely coagulating the molten stainless steel slag into a flat plate by using a flat plate casting machine, and crushing the stainless steel refining slag into fragments by using a single-roll crusher.
Step two: adding the fragments obtained in the step one into a dry cooling machine, completing phase change in the dry cooling machine, and simultaneously generating 3000m of hot air at the temperature of more than 300 DEG C 3 And per ton, the waste heat is used for drying, generating steam or generating electricity for utilization.
Step three: and D, crushing the steel slag in the step two by a dry method, feeding the crushed steel slag into a roller press by a lifter to be extruded to form a cake, separating the uncrushable metal from the steel slag by a fan by utilizing gravity, recovering the metal in the stainless steel slag, and simultaneously obtaining first steel slag powder.
Step four: the steel slag ultra-fine powder extrusion combined grinding system comprises a roller press and an ultra-fine ball mill, wherein the roller press and an air current classifier form a closed circuit, the ball mill is opened, first steel slag powder is fed into a steady flow weighing bin through a belt conveyor and an automatic iron remover by a lifter, materials in the bin are extruded by the roller press to form a material cake, the material cake is fed into the air current classifier by the lifter to be separated, separated coarse powder is fed back to the roller press to be extruded again, separated fine powder is fed into the ball mill to be ground, and the material is ground to obtain second steel slag powder.
Preferably, the dry cooler is a quenching cooler, after the steel slag enters the dry cooler, a material layer is paved on the grid plate, cold air is blown in to pass through the material layer moving on the cooling bed in the mutually perpendicular direction to quench the steel slag, and the steel slag is quenched from 1100 ℃ to below 100 ℃ within a few minutes.
Preferably, when the dry-method cooler is used for treating the steel slag, hot air is generated by 3000-4000 cubic meters per ton of the steel slag, the average air temperature is 300-400 ℃, steam of 0.8-1MPa can be generated by 200-240 tons per ton of the steel slag, and when the waste heat is used for power generation, the electric energy is generated by 3 ten thousand degrees per ton of the steel slag.
Preferably, the steel slag ultrafine powder extrusion and combined grinding system further comprises a dust remover, wherein one part of the dust remover is a dust raising point of a roller press and is collected by an air box pulse bag dust collector; the other part is the mill interior ventilation and is responsible for an air box pulse bag dust collector.
Preferably, the specific surface area of the first steel slag powder in the third step is more than or equal to 300m 2 Kg, the specific surface area of the second steel slag powder in the fourth step is more than or equal to 700m 2 /kg。
Preferably, the metal in the stainless steel slag in the third step is 6-10% of chromium element and 3-7% of nickel element, wherein the metal of less than 3mm accounts for 4% of the total slag.
The beneficial effects of the invention are: by the stainless steel slag dry treatment method, the drying in a workshop is guaranteed, the dust remover cannot be influenced, a large amount of wastewater and slurry cannot be generated, meanwhile, the obtained product comprises metal in the stainless steel slag and second steel slag powder, and the second steel slag powder is applied to cement and concrete to replace cementing materials, asphalt concrete to replace stone powder, desulfurization, acid water neutralization and mortar, so that the stainless steel slag is recycled.
The stainless steel slag dry processing method is utilized to complete phase change in a dry cooler and simultaneously generate 3000m of hot air at the temperature of more than 300 DEG C 3 And per ton, the waste heat is used for drying, generating steam or generating electricity for utilization, and the cyclic utilization is realized.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Specific examples are given below.
Referring to fig. 1, a dry treatment method for stainless steel slag comprises the following specific operation steps:
the method comprises the following steps: and (3) thermal crushing, namely condensing the molten stainless steel slag into a flat plate through a flat plate casting machine, and crushing the stainless steel refining slag into fragments by using a single-roll crusher.
Step two: adding the fragments obtained in the step one into a dry cooling machine, completing phase change in the dry cooling machine, and simultaneously generating 3000m of hot air at the temperature of more than 300 DEG C 3 Per ton, the waste heat is used for drying, generating steam or generating electricity for utilization, each dust collecting point is provided with a dust collector, and the emission is ensured to be less than or equal to 10mg/m 3 No need of water cooling, saving water resource and improving the ring of stainless steel slag treatment processAnd (4) environmental conditions.
Step three: and D, crushing the steel slag in the step two by a dry method, feeding the crushed steel slag into a roller press by a lifter to be extruded to form a cake, separating the uncrushable metal from the steel slag by a fan by utilizing gravity, recovering the metal in the stainless steel slag, and simultaneously obtaining first steel slag powder.
Step four: the steel slag ultra-fine powder extrusion combined grinding system comprises a roller press and an ultra-fine ball mill, wherein the roller press and an air current classifier form a closed circuit, the ball mill is opened, first steel slag powder is fed into a steady flow weighing bin through a belt conveyor and an automatic iron remover by a lifter, materials in the bin are extruded by the roller press to form a material cake, the material cake is fed into the air current classifier by the lifter to be separated, separated coarse powder is fed back to the roller press to be extruded again, separated fine powder is fed into the ball mill to be ground, and the material is ground to obtain second steel slag powder.
The dry cooler is a shock cooling type cooler, after steel slag enters the dry cooler, a material layer is laid on a grate plate, blown cold air penetrates through the material layer moving on a cooling bed in the mutually perpendicular direction to shock cool the steel slag, and the steel slag is shock cooled from 1100 ℃ to below 100 ℃ within a few minutes.
When the dry cooling machine is used for treating the steel slag, 3000-4000 cubic meters of hot air per ton of the steel slag are generated, the average air temperature is 300-400 ℃, 200-240 tons of steam with 0.8-1MPa can be generated per ton of the steel slag, and when the waste heat is used for power generation, 3 ten thousand degrees of electric energy is generated per ton of the steel slag.
The steel slag ultrafine powder extrusion combined grinding system also comprises a dust remover, wherein one part of the dust remover is a dust raising point of a roller press and is collected by an air box pulse bag dust collector; the other part is the mill interior ventilation and is responsible for an air box pulse bag dust collector.
The specific surface area of the first steel slag powder in the third step is more than or equal to 300m 2 Kg, the specific surface area of the second steel slag powder in the fourth step is more than or equal to 700m 2 And/kg, the performance of the steel slag in cement and concrete is changed, and the performance of the steel slag after the combination of 30-50% of mineral powder and 50-60% of second steel slag powder reaches or exceeds the performance of S95 mineral powder.
In the third step, the stainless steel slag contains 6-10% of chromium and 3-7% of nickel, wherein the metal less than 3mm accounts for 4% of the total slag.
By the stainless steel slag dry treatment method, the drying in a workshop is guaranteed, the dust remover cannot be influenced, a large amount of wastewater and slurry cannot be generated, meanwhile, the obtained product comprises metal in the stainless steel slag and second steel slag powder, and the second steel slag powder is applied to cement and concrete to replace cementing materials, asphalt concrete to replace stone powder, desulfurization, acid water neutralization and mortar, so that the stainless steel slag is recycled.
The stainless steel slag dry processing method is utilized to complete phase change in a dry cooler and simultaneously generate 3000m of hot air at the temperature of more than 300 DEG C 3 And per ton, the waste heat is used for drying, generating steam or generating electricity for utilization, and the cyclic utilization is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (7)
1. The dry treatment method for the stainless steel slag is characterized by comprising the following specific operation steps of:
the method comprises the following steps: hot crushing, namely condensing the molten stainless steel slag into a flat plate through a flat plate casting machine, and crushing the stainless steel refining slag into fragments by using a single-roll crusher;
step two: adding the fragments obtained in the step one into a dry cooling machine, completing phase change in the dry cooling machine, and simultaneously generating 3000m hot air at the temperature of more than 300 DEG C 3 The waste heat is used for drying, generating steam or generating electricity for utilization;
step three: crushing the steel slag in the step two by a dry method, feeding the steel slag into a roller press by a lifter to extrude the steel slag to form a material cake, separating the metal which cannot be crushed from the steel slag by a fan by utilizing gravity, recovering the metal in the stainless steel slag and simultaneously obtaining first steel slag powder;
step four: the steel slag ultra-fine powder extrusion and grinding combined system comprises a roller press and an ultra-fine ball mill, wherein the roller press and an air classifier form a closed circuit, the ball mill is opened, first steel slag powder is fed into a steady flow weighing bin through a belt conveyor and an automatic iron remover by a lifter, materials in the bin are extruded by the roller press to form a material cake, the material cake is fed into the air classifier by the lifter to be separated, the separated coarse powder returns to the roller press to be re-extruded, the separated fine powder is fed into the ball mill to be ground, and the material is discharged and ground to obtain second steel slag powder.
2. The dry processing method of stainless steel slag according to claim 1, wherein the dry cooler is a quench cooler, the steel slag is spread on the grate plate after entering the dry cooler, the steel slag is quenched by blowing cold air in a direction perpendicular to each other through the moving bed of the cold bed, and the steel slag is quenched from 1100 ℃ to below 100 ℃ within several minutes.
3. The dry processing method of stainless steel slag as claimed in claim 2, wherein the dry cooler generates hot air in the range of 3000-4000 cubic meters per ton of steel slag, the average air temperature is 300-400 ℃, and the dry cooler can generate steam in the range of 200-240 tons per ton of steel slag at 0.8-1 MPa.
4. The dry processing method of stainless steel slag according to claim 3, wherein when the waste heat is used for power generation, each ton of steel slag generates 3 ten thousand degrees of electric energy.
5. The stainless steel slag dry processing method according to claim 1, wherein the steel slag ultra-fine powder extrusion combined grinding system further comprises a dust remover, wherein one part of the dust remover is a dust raising point of a roller press and is collected by an air box pulse bag dust collector; the other part is the mill interior ventilation and is responsible for an air box pulse bag dust collector.
6. The dry processing method of stainless steel slag according to claim 1, wherein the dry processing method is characterized in thatThe specific surface area of the first steel slag powder in the third step is more than or equal to 300m 2 Kg, the specific surface area of the second steel slag powder in the fourth step is more than or equal to 700m 2 /kg。
7. The dry processing method for stainless steel slag according to claim 1, wherein the metal content in the stainless steel slag in step three is 6-10% chromium element and 3-7% nickel element, and the metal content of < 3mm accounts for 4% of the total slag content.
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| CN202211236920.4A CN115522001A (en) | 2022-10-10 | 2022-10-10 | Dry treatment method for stainless steel slag |
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|---|---|---|---|---|
| US4725307A (en) * | 1986-12-23 | 1988-02-16 | Nippon Jiryoku Senko Co., Ltd. | Method of treating dust and sludge simultaneously with steel slag |
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| CN107916312A (en) * | 2017-11-15 | 2018-04-17 | 重集团大连工程技术有限公司 | Slag dry process and waste heat recovery and electricity-generating method |
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| CN113289750A (en) * | 2021-04-30 | 2021-08-24 | 溧阳中材重型机器有限公司 | Steel slag grinding process |
| CN215197464U (en) * | 2021-04-30 | 2021-12-17 | 溧阳中材重型机器有限公司 | Steel slag grinding system |
| CN114891934A (en) * | 2022-04-29 | 2022-08-12 | 刘春茗 | Steel slag roller type crushing, air quenching and cooling dry processing device and working method thereof |
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2022
- 2022-10-10 CN CN202211236920.4A patent/CN115522001A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4725307A (en) * | 1986-12-23 | 1988-02-16 | Nippon Jiryoku Senko Co., Ltd. | Method of treating dust and sludge simultaneously with steel slag |
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| CN102688880A (en) * | 2012-06-18 | 2012-09-26 | 武汉市天沭科技发展有限公司 | Method for efficiently recovering and reselecting steel slag |
| CN106076574A (en) * | 2016-06-30 | 2016-11-09 | 中建材（合肥）粉体科技装备有限公司 | A kind of double closed-circuit grinding technique of ball mill producing slag super fine |
| CN107916312A (en) * | 2017-11-15 | 2018-04-17 | 重集团大连工程技术有限公司 | Slag dry process and waste heat recovery and electricity-generating method |
| CN109182625A (en) * | 2018-08-27 | 2019-01-11 | 浙江哈斯科节能技术有限公司 | A method of hot melt steel slag dry method cooling system and waste heat recycle |
| CN113289750A (en) * | 2021-04-30 | 2021-08-24 | 溧阳中材重型机器有限公司 | Steel slag grinding process |
| CN215197464U (en) * | 2021-04-30 | 2021-12-17 | 溧阳中材重型机器有限公司 | Steel slag grinding system |
| CN114891934A (en) * | 2022-04-29 | 2022-08-12 | 刘春茗 | Steel slag roller type crushing, air quenching and cooling dry processing device and working method thereof |
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