CN104313208A - Steelmaking slag separation method - Google Patents
Steelmaking slag separation method Download PDFInfo
- Publication number
- CN104313208A CN104313208A CN201410551041.XA CN201410551041A CN104313208A CN 104313208 A CN104313208 A CN 104313208A CN 201410551041 A CN201410551041 A CN 201410551041A CN 104313208 A CN104313208 A CN 104313208A
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- CN
- China
- Prior art keywords
- furnace slag
- steelmaking slag
- separation method
- bessemer furnace
- feed bin
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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
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the metallurgy field, and in particular relates to a steelmaking slag separation method, aiming at solving a technical problem of providing a steelmaking slag separation method which can realize separation and recycling of steelmaking slag with high efficiency. The steelmaking slag separation method is characterized by comprising the following steps: a, conducting hot-simmering treatment on steelmaking slag; b, putting the steelmaking slag to a stock bin and sieving the steelmaking slag; c, obtaining over-sized materials and under-sized materials after being sieved by a bin roller screen, wherein the under-sized materials are sieved by a two-layer flat screen; d, obtaining materials in three specifications, and sequentially processing the materials in three specifications through a semi-permanent magnetic roller; and e, obtaining concentrate, tailing, magnetic separation material and tailing powder through the semi-permanent magnetic roller. The separation method disclosed by the invention realizes deep separation of the steelmaking slag and sufficiently recovers various components in the steelmaking slag, thus improving a utilization rate of the steelmaking slag; and the method disclosed by the invention is especially suitable for a separation process for metallic iron in the steelmaking slag.
Description
Technical field
The present invention relates to field of metallurgy, especially a kind of bessemer furnace slag separation method.
Background technology
The tailings of bessemer furnace slag contains metallic iron, and for the process of bessemer furnace slag, traditional technique means is that the means of the simple poor efficiencys such as simple magnet reclaim, being slatterned by the iron resources of bessemer furnace slag of this break-in.At present, market there is no the method for bessemer furnace slag Separation and Recovery iron comparatively efficiently.
Summary of the invention
Technical problem to be solved by this invention is to provide the bessemer furnace slag separation method that the high efficiency realization of a kind of energy is separated bessemer furnace slag and recycles.
The technical solution adopted for the present invention to solve the technical problems is: bessemer furnace slag separation method, comprises the following steps:
A, bessemer furnace slag is put into pit carry out hot vexed process;
B, heat is vexed after bessemer furnace slag put into feed bin, be provided with feed bin roller screen in described feed bin, by feed bin roller screen, bessemer furnace slag sieved;
C, after the screening of feed bin roller screen, obtain outsifting and screen underflow respectively, wherein screen underflow is put into the double-deck plansifter that upper strata is 60mm ~ 100mm, lower floor is 10mm and is sieved;
D, obtain through the screening of double-deck plansifter the material that size specification is respectively 60mm ~ 200mm, 10mm ~ 60mm, 0 ~ 10mm, tri-kinds of specifications, then by the material of described three kinds of specifications successively through more than half permanent magnetic roller;
E, described half permanent magnetic roller adsorb and obtain iron content magnetic separation thing from the material of 60mm ~ 200mm, 10mm ~ 60mm specification, above-mentioned iron content magnetic separation thing is put into autogenous mill and carry out selected processing acquisition fine fodder, and the remaining tailing of material of 60mm ~ 200mm, 10mm ~ 60mm specification is used for blast furnace flux; Described half permanent magnetic roller adsorbs and obtains magnetic separation material from the material of 0 ~ 10mm specification, and described magnetic separation material is used for staflux, and the remaining tail powder of the material of 0 ~ 10mm specification is used for cement slurry or blended material.
Further, the duration of the vexed process of the heat described in step a is 20 ~ 60 days.
Further, the roller screen spacing of the roller screen of feed bin described in step b is 200mm ~ 300mm.
Further, the outsifting described in step c is separated and obtains outsifting fine fodder and outsifting tailing after breaking.
Further, break described in that adopted equipment is transfer gantry, tank hangs or stone steel hammer.
Further, the outsifting tailing obtained after breaking is rendered to again in the feed bin roller screen described in step b and sieve again.
Further, the upper strata of double-deck plansifter described in steps d is plantation rubber hole sizer, and the lower floor of double-deck plansifter is steel wire hole sizer.
The invention has the beneficial effects as follows: in order to extract the metallic iron contained in tailings in bessemer furnace slag, the present invention be first bessemer furnace slag is carried out heat vexed after sieved by feed bin roller screen, thus obtain outsifting and screen underflow.In order to further utilize screen underflow, next by double-deck plansifter, further sub-sieve being carried out to screen underflow, and obtaining the material of three kinds of specifications, and further deeply recycling.Present invention achieves and be separated the degree of depth of bessemer furnace slag, realized recycling by each integral part contained in bessemer furnace slag fully, improve the utilization ratio of bessemer furnace slag, the present invention is particularly useful in the separating technology of metallic iron in bessemer furnace slag.
Embodiment
Bessemer furnace slag separation method of the present invention, comprises the following steps:
A, bessemer furnace slag is put into pit carry out hot vexed process;
B, heat is vexed after bessemer furnace slag put into feed bin, be provided with feed bin roller screen in described feed bin, by feed bin roller screen, bessemer furnace slag sieved;
C, after the screening of feed bin roller screen, obtain outsifting and screen underflow respectively, wherein screen underflow is put into the double-deck plansifter that upper strata is 60mm ~ 100mm, lower floor is 10mm and is sieved;
D, obtain through the screening of double-deck plansifter the material that size specification is respectively 60mm ~ 200mm, 10mm ~ 60mm, 0 ~ 10mm, tri-kinds of specifications, then by the material of described three kinds of specifications successively through more than half permanent magnetic roller;
E, described half permanent magnetic roller adsorb and obtain iron content magnetic separation thing from the material of 60mm ~ 200mm, 10mm ~ 60mm specification, above-mentioned iron content magnetic separation thing is put into autogenous mill and carry out selected processing acquisition fine fodder, and the remaining tailing of material of 60mm ~ 200mm, 10mm ~ 60mm specification is used for blast furnace flux; Described half permanent magnetic roller adsorbs and obtains magnetic separation material from the material of 0 ~ 10mm specification, and described magnetic separation material is used for staflux, and the remaining tail powder of the material of 0 ~ 10mm specification is used for cement slurry or blended material.
General, in step e, iron content magnetic separation thing puts into the iron content degree MFe>70% that autogenous mill carries out the fine fodder that selected processing obtains.For step a, the duration of the vexed process of the heat described in described step a is 20 ~ 60 days is the best.For step b, the roller screen spacing of feed bin roller screen described in described step b is 200mm ~ 300mm, can control the size range of outsifting and the screen underflow obtained so preferably.
Further, for the outsifting described in step c, outsifting is separated after breaking and obtains outsifting fine fodder and outsifting tailing, outsifting fine fodder iron content degree here
mFe>75%.Described break that adopted equipment is transfer gantry, tank hangs or stone steel hammer.And above-mentioned break after the outsifting tailing that obtains again can render to described in step b feed bin roller screen in sieve again, realize utilizing more fully.
In addition, in view of the technique of plansifter double-deck described in steps d needs, generally described double-deck plansifter being designed to upper strata is plantation rubber hole sizer, and the lower floor of double-deck plansifter is the structure of steel wire hole sizer.
Embodiment
Embodiment one:
Bessemer furnace slag after vexed for heat 30 days is sent into feed bin, the feed bin roller screen of feeding 250mm spacing sieves, the outsifting being greater than 250mm obtains outsifting fine fodder (MFe=76%) by breaking, screen underflow passes through Belt Conveying, entering upper strata is 60mm, lower floor is the double-deck plansifter screening of 10mm, upper strata sieve aperture is plantation rubber pass, lower floor is steel wire hole sizer, obtain the material of three kinds of specifications: 60-250mm, 10-60mm, 0-10mm, and successively by half permanent magnetic roller deironing, the magnetic separation thing of 60-250mm and 10-60mm together enters autogenous mill and carries out selected processing acquisition fine fodder (MFe=78%), remaining is respectively 60-250mm, the tailing of 10-60mm is used for blast furnace flux, namely 0-10mm obtains tail powder (MFe=0.5%) and magnetic separation material (MFe=8%) after magnetic separation, be respectively used to cement slurry or blended material and staflux.
Embodiment two:
Bessemer furnace slag after vexed for heat 40 days is sent into uncovered feed bin, the feed bin roller screen of feeding 250mm spacing sieves, the outsifting being greater than 220mm obtains outsifting fine fodder (MFe=80%) by breaking, screen underflow passes through Belt Conveying, entering upper strata is 100mm, lower floor is the double-deck plansifter screening of 10mm, upper strata sieve aperture is plantation rubber pass, lower floor is steel wire hole sizer, obtain the material of three kinds of specifications: 100-220mm, 10-100mm, 0-10mm, and successively by half permanent magnetic roller deironing, the magnetic separation thing of 100-220mm and 10-100mm together enters autogenous mill and carries out selected processing acquisition fine fodder (MFe=72%), remaining is respectively 100-220mm, the tailing of 10-100mm is used for blast furnace flux, namely 0-10mm obtains tail powder (MFe=0.5%) and magnetic separation material (MFe=5%) after magnetic separation, be respectively used to cement slurry or blended material and staflux.
Claims (7)
1. bessemer furnace slag separation method, is characterized in that, comprises the following steps:
A, bessemer furnace slag is put into pit carry out hot vexed process;
B, heat is vexed after bessemer furnace slag put into feed bin, be provided with feed bin roller screen in described feed bin, by feed bin roller screen, bessemer furnace slag sieved;
C, after the screening of feed bin roller screen, obtain outsifting and screen underflow respectively, wherein screen underflow is put into the double-deck plansifter that upper strata is 60mm ~ 100mm, lower floor is 10mm and is sieved;
D, obtain through the screening of double-deck plansifter the material that size specification is respectively 60mm ~ 200mm, 10mm ~ 60mm, 0 ~ 10mm, tri-kinds of specifications, then by the material of described three kinds of specifications successively through more than half permanent magnetic roller;
E, described half permanent magnetic roller adsorb and obtain iron content magnetic separation thing from the material of 60mm ~ 200mm, 10mm ~ 60mm specification, above-mentioned iron content magnetic separation thing is put into autogenous mill and carry out selected processing acquisition fine fodder, and the remaining tailing of material of 60mm ~ 200mm, 10mm ~ 60mm specification is used for blast furnace flux; Described half permanent magnetic roller adsorbs and obtains magnetic separation material from the material of 0 ~ 10mm specification, and described magnetic separation material is used for staflux, and the remaining tail powder of the material of 0 ~ 10mm specification is used for cement slurry or blended material.
2. bessemer furnace slag separation method as claimed in claim 1, is characterized in that: the duration of the vexed process of the heat described in step a is 20 ~ 60 days.
3. bessemer furnace slag separation method as claimed in claim 1 or 2, is characterized in that: the roller screen spacing of the roller screen of feed bin described in step b is 200mm ~ 300mm.
4. bessemer furnace slag separation method as claimed in claim 1 or 2, is characterized in that: the outsifting described in step c is separated and obtains outsifting fine fodder and outsifting tailing after breaking.
5. bessemer furnace slag separation method as claimed in claim 4, is characterized in that: described in break that adopted equipment is transfer gantry, tank hangs or stone steel hammer.
6. bessemer furnace slag separation method as claimed in claim 4, is characterized in that: again rendered to by the outsifting tailing obtained after breaking in the feed bin roller screen described in step b and sieve.
7. the bessemer furnace slag separation method as described in claim 1,2,5 or 6, is characterized in that: the upper strata of double-deck plansifter described in steps d is plantation rubber hole sizer, and the lower floor of double-deck plansifter is steel wire hole sizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551041.XA CN104313208A (en) | 2014-10-16 | 2014-10-16 | Steelmaking slag separation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551041.XA CN104313208A (en) | 2014-10-16 | 2014-10-16 | Steelmaking slag separation method |
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| Publication Number | Publication Date |
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| CN104313208A true CN104313208A (en) | 2015-01-28 |
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| CN201410551041.XA Pending CN104313208A (en) | 2014-10-16 | 2014-10-16 | Steelmaking slag separation method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602765A (en) * | 2013-12-03 | 2014-02-26 | 攀枝花钢城集团有限公司 | Method for separation of slag and iron in shaft furnace molten iron solid slag |
| CN103602768A (en) * | 2013-11-29 | 2014-02-26 | 攀枝花钢城集团有限公司 | Converter steel slag hot closed treatment method, slag-iron separation method and uses of by-products |
| CN103627830A (en) * | 2013-11-29 | 2014-03-12 | 攀枝花钢城集团有限公司 | Molten iron desulphurization slag pre-processing method, slag-iron separating method and application of by-products |
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2014
- 2014-10-16 CN CN201410551041.XA patent/CN104313208A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602768A (en) * | 2013-11-29 | 2014-02-26 | 攀枝花钢城集团有限公司 | Converter steel slag hot closed treatment method, slag-iron separation method and uses of by-products |
| CN103627830A (en) * | 2013-11-29 | 2014-03-12 | 攀枝花钢城集团有限公司 | Molten iron desulphurization slag pre-processing method, slag-iron separating method and application of by-products |
| CN103602765A (en) * | 2013-12-03 | 2014-02-26 | 攀枝花钢城集团有限公司 | Method for separation of slag and iron in shaft furnace molten iron solid slag |
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