CN101927208A - Optimized process for processing steel slag by magnetic separation - Google Patents
Optimized process for processing steel slag by magnetic separation Download PDFInfo
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- CN101927208A CN101927208A CN2009100121626A CN200910012162A CN101927208A CN 101927208 A CN101927208 A CN 101927208A CN 2009100121626 A CN2009100121626 A CN 2009100121626A CN 200910012162 A CN200910012162 A CN 200910012162A CN 101927208 A CN101927208 A CN 101927208A
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- 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
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Abstract
The invention relates to an optimized process for processing steel slag by magnetic separation, which is characterized by comprising the following steps: (1) screening steel slag by using a No.1 vibrating screen, separating out the steel slag and slag steel by using a No.1 magnetic separator to separate the oversize material, feeding the slag steel to a slag steel tank, and feeding the steel slag to a jaw crusher; (2) feeding the screen underflow of the No.1 vibrating screen and the discharge of the jaw crusher to a No.2 vibrating screen together, separating the oversize material by using a No.2 magnetic separator, feeding the separated slag steel to a rod mill, and stripping steel slag on the slag steel by the vibration effect of the rod mill; (3) feeding the steel slag separated out by the No.2 magnetic separator to a No.3 vibrating screen, feeding the oversize material to a large-size tailing storeroom, and feeding the screen underflow to a medium-size tailing storeroom; and (4) feeding the discharge of the rod mill to a No.4 vibrating screen, feeding the oversize material the iron content of which is no less than 90% to the slag steel tank, feeding the screen underflow to a No.3 magnetic separator, feeding the separated steel slag magnetic separation powder to a magnetic separation powder storeroom, and feeding the steel slag to a small-size tailing storeroom. By using the invention, high-quality slag steel the iron content of which is more than 90% can be obtained, thereby fully recovering the iron in the steel slag.
Description
Technical field
The present invention relates to a kind of slag treatment process, particularly a kind of optimization technology of processing steel slag by magnetic separation.
Background technology
Slag is the waste residue of discharging in the steelmaking process, and at present, domestic slag process technology is single, generally adopts fragmentation-screening-magnetic separation to sort.Existing 2,400,000 tons of/year magnetic separation processing lines of Anshan iron and steel plant are used for handling the slag that converter produces.This production line adopts two sections magnetic pulleys of two sections fragmentations to sort, and the steel scoria magnetic separation product after sorting is divided into a steel, magnetic separation, converter tailings.The granularity of being produced is the grain steel of 10～50mm, and iron-holder is 60%～65%, and because of its basicity fluctuation is big, there is certain difficulty in the recycling of loopback blast furnace, and the grain steel is stored up contaminated environment in a large number.Therefore, need further optimize, improve the rate of recovery of iron and steel material and the utilization rate of converter tailings steel scoria magnetic separation technology.
Summary of the invention
The object of the present invention is to provide a kind of optimization technology of processing steel slag by magnetic separation, this technology can make the iron and steel material fully reclaim, and handles back grain steel iron-holder 〉=90%, is used for steel-making as steel scrap, improves the utilization rate of magnetic separation rear converter tailings simultaneously.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of optimization technology of steel scoria magnetic separation processing, this technology is raw material with the vexed slag of heat, after fragmentation, screening, magnetic separation, rod milling, obtains product slag steel, magnetic separation, converter ground slag, this technology comprises the steps:
1) with after the vexed processing of molten steel slag heat, sieve by the 1# vibratory sieve, after the deironing of oversize material, slag is delivered to hydraulic jaw crusher and is carried out fragmentation, and bulk slag steel drops down onto in the slag steel tank temporarily;
2) material behind 1# vibratory sieve undersize material and the jaw crushing crusher machine together sieves by the 2# vibratory sieve; Obtain magnetic separation and converter ground slag after the deironing of 2# vibratory sieve undersize material;
3) after the deironing of 2# vibratory sieve oversize material, slag is delivered to the 3# vibratory sieve and is sieved the converter tailings that obtains two kinds of specifications;
4) after the deironing of 2# vibratory sieve oversize material, the slag steel that obtains is delivered to rod mill and is carried out rod milling, delivers to the 4# vibratory sieve after the rod mill blanking, and 4# vibratory sieve oversize material slag steel drops down onto in the slag steel tank temporarily; Undersize material converter ground slag and 2# vibratory sieve undersize material converter ground slag together enter the tailings storehouse.
The granularity of the vexed slag of described raw material heat is 0～200mm, wherein, 0～60mm greater than 90%.
The aperture of described 1# vibratory sieve is that the aperture of 80mm, 2# vibratory sieve is that the aperture of 10mm, 3# vibratory sieve is that the aperture of 50mm, 4# vibratory sieve is 10mm.
Described product is: particle diameter is the slag steel of 10～80mm, 80～200mm, the magnetic separation that particle diameter is 0～10mm, the converter ground slag that particle diameter is 0～10mm, 10～50mm, 50～80mm.
The invention has the beneficial effects as follows: this technology both can be handled converter slag separately, can also handle the desulfurization slag, by fragmentation and multi-stage screening, and use rod mill that steel and the further of slag are separated, can obtain iron-holder greater than 90% high-quality steel scrap, make the iron in the slag obtain abundant recovery, effectively utilize steel slag resource, improved the Multipurpose Utilization of Steel Slag rate, reduced environmental pollution, the slag tailings is done more classifications, to improve the utilization rate of magnetic separation rear converter tailings.
Description of drawings
Fig. 1 is the optimization technology of a kind of processing steel slag by magnetic separation of the present invention.
The specific embodiment
The present invention is further described below in conjunction with accompanying drawing.
A kind of optimization technology of steel scoria magnetic separation processing, this technology is raw material with the vexed slag of heat, obtains slag steel, magnetic separation, converter ground slag after fragmentation, screening, magnetic separation, rod milling.This technology comprises the steps:
1) with granularity be 0～200mm (wherein, 0～60mm greater than 90%) the vexed processing of molten steel slag heat after slag to be delivered to the aperture by 1# oscillating feeder, 1# adhesive tape conveyor be that the 1# vibratory sieve of 80mm sieves, the oversize material through the 3# rubber conveyer be delivered to 1# electromagnetism self-unloading tramp iron separator, 2# electromagnetism self-unloading tramp iron separator carries out deironing, slag after the deironing is delivered to hydraulic jaw crusher and is carried out fragmentation, and granularity is that the bulk slag steel of 80-200mm drops down onto in the slag steel tank of 80-200mm temporarily;
2) 1# vibratory sieve undersize material is carried through 2# rubber conveyer, 4# rubber conveyer, together is transported to the 2# vibratory sieve that the aperture is 10mm with material behind the jaw crushing crusher machine through the 5# rubber conveyer, sieves; 2# vibratory sieve undersize material is carried through 15# rubber conveyer, bucket elevator, 16# rubber conveyer, and after the deironing of 5# electromagnetism self-unloading tramp iron separator, the magnetic separation that obtains 0～10mm is delivered to the magnetic separation storehouse; Particle diameter is that the converter ground slag of 0～10mm is delivered to the tailings storehouse through the 17# rubber conveyer;
3) 2# vibratory sieve oversize material is carried through the 6# rubber conveyer, after the deironing of 4# electromagnetism self-unloading tramp iron separator, it is that the 3# vibratory sieve of 50mm sieves that the slag of 10-80mm is delivered to the aperture through the 7# rubber conveyer, obtain the converter ground slag of two kinds of specifications of 10～50mm, 50～80mm, send into the tailings storehouse through 9# rubber conveyer, 10# rubber conveyer respectively;
4) slag of 2# vibratory sieve oversize material 10-80mm is after the 6# rubber conveyer is delivered to the deironing of 4# electromagnetism self-unloading tramp iron separator, the 10-80mm slag steel that obtains is delivered to rod mill through 11# rubber conveyer, 2# oscillating feeder and is carried out rod milling, the rod mill blanking is after 12# rubber conveyer, 13# rubber conveyer are delivered to the 4# vibratory sieve that the aperture is 10mm, and 4# vibratory sieve oversize material slag steel drops down onto in the slag steel tank of 10-80mm temporarily; The converter ground slag of undersize material 0-10mm is carried through the 14# adhesive tape conveyor, carry through the 15# adhesive tape conveyor again with 2# vibratory sieve undersize material, deliver to 5# electromagnetism self-unloading tramp iron separator through bucket elevator, 16# rubber conveyer, after deironing, the converter ground slag is delivered to through the 17# rubber conveyer and is entered the tailings storehouse; Magnetic separation enters the magnetic separation storehouse.
This technology is applicable to vessel slag and desulfurization slag, and the iron and steel material is fully reclaimed, and the steel scrap after the recovery is used for steel-making; Improved the converter tailings utilization rate after the magnetic separation simultaneously.
Claims (4)
1. the optimization technology of a steel scoria magnetic separation processing is characterized in that this technology is raw material with the vexed slag of heat, after fragmentation, screening, magnetic separation, rod milling, obtains product slag steel, magnetic separation, converter ground slag, and this technology comprises the steps:
1) with after the vexed processing of molten steel slag heat, sieve by the 1# vibratory sieve, after the deironing of oversize material, slag is delivered to hydraulic jaw crusher and is carried out fragmentation, and bulk slag steel drops down onto in the slag steel tank temporarily;
2) material behind 1# vibratory sieve undersize material and the jaw crushing crusher machine together sieves by the 2# vibratory sieve; Obtain magnetic separation and converter ground slag after the deironing of 2# vibratory sieve undersize material;
3) after the deironing of 2# vibratory sieve oversize material, slag is delivered to the 3# vibratory sieve and is sieved the converter tailings that obtains two kinds of specifications;
4) after the deironing of 2# vibratory sieve oversize material, the slag steel that obtains is delivered to rod mill and is carried out rod milling, delivers to the 4# vibratory sieve after the rod mill blanking, and 4# vibratory sieve oversize material slag steel drops down onto in the slag steel tank temporarily; Undersize material converter ground slag and 2# vibratory sieve undersize material converter ground slag together enter the tailings storehouse.
2. the optimization technology of a kind of steel scoria magnetic separation processing according to claim 1 is characterized in that, the granularity of the vexed slag of described raw material heat is 0～200mm, wherein, 0～60mm greater than 90%.
3. the optimization technology of a kind of steel scoria magnetic separation processing according to claim 1 is characterized in that, the aperture of described 1# vibratory sieve is that the aperture of 80mm, 2# vibratory sieve is that the aperture of 10mm, 3# vibratory sieve is that the aperture of 50mm, 4# vibratory sieve is 10mm.
4. the optimization technology of a kind of steel scoria magnetic separation processing according to claim 1, it is characterized in that described product is that particle diameter is the slag steel of 10～80mm, 80～200mm, the magnetic separation that particle diameter is 0～10mm, the converter ground slag that particle diameter is 0～10mm, 10～50mm, 50～80mm.
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Cited By (26)
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| CN102534068A (en) * | 2012-01-30 | 2012-07-04 | 山西太钢不锈钢股份有限公司 | Method for reusing common steel slag |
| CN102747174A (en) * | 2012-07-04 | 2012-10-24 | 新兴河北工程技术有限公司 | Process for extracting steel scrap and fine iron powder from slag by using dry method |
| CN103031390A (en) * | 2011-09-30 | 2013-04-10 | 鞍钢股份有限公司 | Method for utilizing tailings after hot-disintegration treatment of converter slag |
| CN103041904A (en) * | 2012-12-25 | 2013-04-17 | 鞍山钢铁集团公司 | Steel slag powder producing method employing roller press |
| CN103084266A (en) * | 2011-10-28 | 2013-05-08 | 鞍钢集团工程技术有限公司 | Smelting steel tailings micro-powder production method and apparatus thereof |
| CN103276122A (en) * | 2013-06-19 | 2013-09-04 | 济钢集团有限公司 | Short-process magnetic separation steel slag recovery device and method thereof |
| CN103290153A (en) * | 2013-06-05 | 2013-09-11 | 中冶建筑研究总院有限公司 | Steel slag treating technology |
| CN103508688A (en) * | 2012-06-27 | 2014-01-15 | 南京梅山冶金发展有限公司 | Post-treatment method for desulphurization slag |
| CN103937915A (en) * | 2014-04-10 | 2014-07-23 | 攀钢集团西昌钢钒有限公司 | Converter slag treatment method |
| CN104004867A (en) * | 2014-05-13 | 2014-08-27 | 中冶南方工程技术有限公司 | High-efficiency economic secondary treatment process for steel slag |
| CN104120205A (en) * | 2013-04-28 | 2014-10-29 | 上海梅山钢铁股份有限公司 | Method for recycling iron in molten iron desulphurization residue |
| CN104492581A (en) * | 2014-06-13 | 2015-04-08 | 江苏融达新材料股份有限公司 | Method for processing multi-cooling mode cooled steel slag to recover metal |
| CN104862490A (en) * | 2015-05-28 | 2015-08-26 | 中冶南方工程技术有限公司 | Method and device for recycling stainless steel slags |
| CN105312142A (en) * | 2015-11-26 | 2016-02-10 | 鞍山钢铁集团公司矿渣开发公司 | Method for final powder grinding of metallurgical steel slag and production line thereof |
| CN106179674A (en) * | 2016-07-11 | 2016-12-07 | 杨立武 | A kind of steel-making tailings resource recoverying and utilizing method and system |
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| CN115055271A (en) * | 2022-06-06 | 2022-09-16 | 山东莱钢永锋钢铁有限公司 | Recovery processing method of iron ore powder magnetically separated from converter steel slag |
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| CN115055271A (en) * | 2022-06-06 | 2022-09-16 | 山东莱钢永锋钢铁有限公司 | Recovery processing method of iron ore powder magnetically separated from converter steel slag |
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