CN103014198A - Treatment method of molten iron pretreatment slag - Google Patents
Treatment method of molten iron pretreatment slag Download PDFInfo
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- CN103014198A CN103014198A CN2011102823813A CN201110282381A CN103014198A CN 103014198 A CN103014198 A CN 103014198A CN 2011102823813 A CN2011102823813 A CN 2011102823813A CN 201110282381 A CN201110282381 A CN 201110282381A CN 103014198 A CN103014198 A CN 103014198A
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- slag
- iron
- hot metal
- metal pretreatment
- molten iron
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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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- Manufacture And Refinement Of Metals (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a treatment method of molten iron pretreatment slag. The method comprises the steps that: I, molten iron pretreatment slag is delivered to a slag field; II, the molten iron pretreatment slag is poured into a storage field; molten iron pretreatment slag with a size larger than 500mm is crushed; the molten iron pretreatment slag is stored in a material storage chamber; and dust suppression is carried out by using water spray. III, wetted molten iron pretreatment slag is delivered into a pit; molten iron pretreatment slag with a size larger than 200mm is sorted out by using a steel grate; iron-containing slag therein is sorted by using a magnetic plate crane, and is delivered to a scrap steel yard; IV, molten iron pretreatment slag with a size no larger than 200mm is delivered into a treatment line; slag iron is sorted by an iron separator and by drum magnetic separation; and tail slag is stored; and V, particle size grading is carried out upon sorted slag iron with a size no larger than 200mm; iron particles with a size smaller than 8mm are recycled in sintering as a flux; slag iron with a size of 8-200mm is grinded and finely selected by using a magnetic separator, such that high-grade slag iron is selected; and slag iron with a grade higher than 80% is adopted as a steelmaking raw material; and tail slag is delivered into a tail slag storehouse. With the treatment method provided by the invention, grade of slag iron in molten iron pretreatment slag is improved.
Description
Technical field
The present invention relates to a kind for the treatment of process of hot metal pretreatment slag.
Background technology
For guaranteeing that the molten iron that uses in the smelting process meets smelting requirements, usually to carry out pre-treatment to molten iron in the iron and steel enterprise, be divided into for the smelting demand molten iron is taken off S or takes off P, S, two kinds of processing modes of Si.The slag that takes off the generation of S process is commonly called as desulfurization slag, and S content is higher in the slag; The slag that takes off P, S, the generation of Si process is commonly called as three and takes off slag, and the content of P, S, Si is higher in the slag.
Slag is combined with iron closely in the pre-treatment slag, separation difficulty, generally be flakey, the treatment process of existing hot metal pretreatment slag is that the method for magnetic separation behind the bulk slag simple crushing is processed, the slag iron dregginess of selecting is large, impurity is many, grade is low, harmful element wherein returns to smelt with slag iron and can produce the secondary pollution problem to molten steel, therefore need a kind of specially for the treatment process of the system of hot metal pretreatment slag, realize the effective separation of slag and iron, improve the metal content of selecting, provide condition for it returns smelting procedure.
Summary of the invention
In order to overcome the above-mentioned weak point of the treatment process that has the hot metal pretreatment slag now, the invention provides a kind of slag, iron separating effect of improving, improved the treatment process of the hot metal pretreatment slag of metal content.
The treatment process of this hot metal pretreatment slag is included as following step successively:
1 is transported to the slag field with the hot metal pretreatment slag with slag ladle;
2 slag pot tippings are poured cooled hot metal pretreatment slag into the storage place, utilize big gun hammer general＞500mm hot metal pretreatment slag to break into pieces, and then by forklift, shovel loader the hot metal pretreatment slag is sent between storing and stored up, and the water spray dust suppression;
3 usefulness forklifts are sent the hot metal pretreatment slag after wetting into melt pit, select by the hot metal pretreatment slag that places the steel double-edged fine-toothed comb general＞200mm on the melt pit, utilize magnetic disc suspending (magnetic separation) will be wherein iron bearing slag making material select, and be sent to the steel scrap stockyard for making steel;
The hot metal pretreatment slag of 4 general≤200mm enters the processing line by feeding machine in the melt pit, the slag iron in the hot metal pretreatment slag is selected the tailings warehouse-in through tramp iron separator (secondary magnetic separation), cylinder magnetic separation (three magnetic separation);
All slag iron of selecting among the 5 general≤200mm carry out size classification:＜8mm abrasive grit returns the sintering utilization as flux; After 8-200mm slag iron enters rod mill and grinds, selected by magnetic separator, higher-grade slag iron is selected, grade＞80% as steelmaking feed, tailings enters the tailings storehouse.
The treatment process of this hot metal pretreatment slag has solved the slag in the steel-making enterprise pre-treatment slag, the problem that iron is difficult to separate; Improve the grade of slag iron in the hot metal pretreatment slag, supplied the abrasive grit grade of sintering to reach more than 50%; Reduced the secondary pollution that harmful element produces molten steel with slag ferrikinetics utilization in the slag.
Embodiment
Describe the embodiment of the treatment process of this hot metal pretreatment slag in detail below in conjunction with embodiment, but the embodiment of the treatment process of this hot metal pretreatment slag is not limited to the above embodiments.
Embodiment
The slag that present embodiment is processed is the slag that hot metal pretreatment is taken off P, S, the generation of Si process, is commonly called as three and takes off slag, and the content of P, S, Si is up to 1%, 2%, 35% in the slag.Present embodiment is processed 30 tons of slags.
Present embodiment is following step successively:
1 with the hot metal pretreatment slag through 11m
3Slag ladle is transported to the slag field, and every slag ladle quantity of slag is 30 tons;
2 slag pot tippings are poured cooled hot metal pretreatment slag into the storage place, utilize big gun hammer general＞500mm hot metal pretreatment slag to break into pieces, and then by forklift, shovel loader the hot metal pretreatment slag is sent between storing and stored up, and the water spray dust suppression;
3 usefulness forklifts are sent the hot metal pretreatment slag after wetting into melt pit, select by the hot metal pretreatment slag that places the steel double-edged fine-toothed comb general＞200mm on the melt pit, every slag ladle is 9 tons, utilize magnetic disc suspending (magnetic separation) will be wherein iron bearing slag making material select, every slag ladle is 6 tons and is sent to the steel scrap stockyard for steel-making, selects that tailing is 3 tons behind the iron;
The hot metal pretreatment slag of 4 general≤200mm, weight is 21 tons, send into the processing line by feeding machine in the melt pit, through tramp iron separator (secondary magnetic separation), cylinder (three magnetic separation) magnetic separation the slag iron in the hot metal pretreatment slag is selected, weight is 19 tons, tailings weight after the choosing is 2 tons, enters the tailings storehouse;
All slag iron of selecting among the 5 general≤200mm carry out size classification:＜8mm abrasive grit returns the sintering utilization, 6 tons of every slag ladles; 13 tons of the slag iron of 8-200mm, selected by magnetic separator after entering rod mill and grinding, higher-grade slag iron is selected, weight is 9 tons, grade＞80% as steelmaking feed, tailings enters the tailings storehouse.
After present embodiment is processed 30 tons of hot metal pretreatment slags, 9 tons of the slag steel of iron content＞80% wherein, 6 tons of the slag steel of iron content＞50%, 6 tons of＞200mm slag steel, all the other are 9 tons altogether of tailings.
Claims (1)
1. the treatment process of a hot metal pretreatment slag, it is included as following step successively:
I is transported to the slag field with the hot metal pretreatment slag with slag ladle;
The II slag pot tipping is poured cooled hot metal pretreatment slag into the storage place, utilizes big gun hammer general＞500mm hot metal pretreatment slag to break into pieces, and then by forklift, shovel loader the hot metal pretreatment slag is sent between storing and stored up, and the water spray dust suppression;
III sends the hot metal pretreatment slag after wetting into melt pit with forklift, selects by the hot metal pretreatment slag that places the steel double-edged fine-toothed comb general＞200mm on the melt pit, utilize magnetic disc suspending will be wherein iron bearing slag making material select, and be sent to the steel scrap stockyard for making steel;
The hot metal pretreatment slag of IV general≤200mm enters the processing line by feeding machine in the melt pit, the slag iron in the hot metal pretreatment slag is selected the tailings warehouse-in through tramp iron separator, cylinder magnetic separation;
All slag iron of selecting among the V general≤200mm carry out size classification:＜8mm abrasive grit returns the sintering utilization as flux; After 8-200mm slag iron enters rod mill and grinds, selected by magnetic separator, higher-grade slag iron is selected, grade＞80% as steelmaking feed, tailings enters the tailings storehouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102823813A CN103014198A (en) | 2011-09-21 | 2011-09-21 | Treatment method of molten iron pretreatment slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102823813A CN103014198A (en) | 2011-09-21 | 2011-09-21 | Treatment method of molten iron pretreatment slag |
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| CN103014198A true CN103014198A (en) | 2013-04-03 |
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| CN2011102823813A Pending CN103014198A (en) | 2011-09-21 | 2011-09-21 | Treatment method of molten iron pretreatment slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB815619A (en) * | 1956-07-27 | 1959-07-01 | Ernest Newell & Company Ltd | Improvements in or relating to the separation of scrap steel from slag |
| CN1089191A (en) * | 1993-04-12 | 1994-07-13 | 鞍山钢铁公司 | Magnetic separating, processing and recovery system for steel slag |
| CN1718749A (en) * | 2005-06-30 | 2006-01-11 | 湖北大学 | Method of recovering iron from slag breeze |
| CN101249498A (en) * | 2008-04-03 | 2008-08-27 | 南京钢铁集团盛达实业有限公司 | Cold steel scoria processing method |
| CN101298079A (en) * | 2008-04-28 | 2008-11-05 | 莱芜钢铁集团泰东实业有限公司 | Environmental protection process method of desulfurizing slag of hot metal |
| CN101596488A (en) * | 2009-04-25 | 2009-12-09 | 张英君 | A kind of stainless steel slag jigging iron separation technique |
-
2011
- 2011-09-21 CN CN2011102823813A patent/CN103014198A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB815619A (en) * | 1956-07-27 | 1959-07-01 | Ernest Newell & Company Ltd | Improvements in or relating to the separation of scrap steel from slag |
| CN1089191A (en) * | 1993-04-12 | 1994-07-13 | 鞍山钢铁公司 | Magnetic separating, processing and recovery system for steel slag |
| CN1718749A (en) * | 2005-06-30 | 2006-01-11 | 湖北大学 | Method of recovering iron from slag breeze |
| CN101249498A (en) * | 2008-04-03 | 2008-08-27 | 南京钢铁集团盛达实业有限公司 | Cold steel scoria processing method |
| CN101298079A (en) * | 2008-04-28 | 2008-11-05 | 莱芜钢铁集团泰东实业有限公司 | Environmental protection process method of desulfurizing slag of hot metal |
| CN101596488A (en) * | 2009-04-25 | 2009-12-09 | 张英君 | A kind of stainless steel slag jigging iron separation technique |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104120205B (en) * | 2013-04-28 | 2016-12-07 | 上海梅山钢铁股份有限公司 | A kind of recycle the method for ferrum in desulfurizing slag of hot metal |
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Application publication date: 20130403 |