CN101693929A - Method for preparing slagging scrap by using steel-making waste residue - Google Patents
Method for preparing slagging scrap by using steel-making waste residue Download PDFInfo
- Publication number
- CN101693929A CN101693929A CN200910075592A CN200910075592A CN101693929A CN 101693929 A CN101693929 A CN 101693929A CN 200910075592 A CN200910075592 A CN 200910075592A CN 200910075592 A CN200910075592 A CN 200910075592A CN 101693929 A CN101693929 A CN 101693929A
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- China
- Prior art keywords
- slag
- steel
- iron
- heat
- magnetic separation
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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
-
- 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)
- Furnace Details (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a method for preparing slagging scrap by using steel-making waste slag, which comprises the following steps: pouring slag which is discharged 5-6h ago into a heat soaking furnace with a water-cooling device, covering for heat soaking and cooling, enabling the slag to become fin granules after reaching room temperature, discharging, conveying the slag processed by the heat soaking furnace to a slag yard by a vehicle or belt for sieving and magnetically separating, returning the slag with thick granules which do not pass through a sieve for heat soaking; conveying the sieved slag to a first magnetic separation roller by the belt for magnetically separating to obtain magnetically separated slag, enabling residue to pass through a second strong magnetic separation roll to obtain magnetically separated slag, leading the last residue to pass through a ball mill for fine milling; selecting out metal charges containing iron by a magnetic separator to obtain magnetically separated slag powder, and collecting the magnetically separated slag and the magnetically separated slag powder to obtain the slagging scrap. The invention can reduce the pollution of the slag waste and molten iron pouring to the environment.
Description
Technical field
The present invention relates to a kind of method of utilizing steel-making waste residue to prepare the slag making steel scrap.
Background technology
The slag of steel-making contains the ferric oxide about 15%, also takes a part of molten steel simultaneously when deslagging out of, and the slag of steelworks is mostly discarded at present.Not only waste, and land occupation pollutes.And the smelting slag making steel scrap of steelworks adopts iron block to add the outsourcing steel scrap, and this has increased cost again.
Summary of the invention:
In order to overcome the shortcoming of prior art, the invention provides a kind of converter environmental protection steelmaking process, it can reduce, and slag is discarded, molten iron is poured into a mould the pollution to environment.
The present invention solves the technical scheme that its technical problem takes: the slag after will coming out of the stove 5-6 hour is poured in the stewing stove of heat of band water cooling plant, carry out the stewing cooling of capping heat, slag becomes tiny particle after reaching room temperature, come out of the stove, being transported to the slag field by the slag after the stewing stove processing of heat by vehicle or belt sieves, magnetic separation, do not cross and sieve coarse grained slag and return and carry out again that heat is stewing to be handled, the slag that sieves is transported to first magnetic separation roller by belt and carries out magnetic separation, get the steel slag magnetically dressing of iron-holder grade about 70%-80%, clout is after the powerful magnetic separation roller in second road, get the steel slag magnetically dressing of iron-holder grade about 40%-%50%, last clout is levigate after ball mill, select ferruginous metal charge by magnetic separator, get the iron-holder grade at 20%-30% left and right sides steel slag magnetically dressing powder, collect the steel slag magnetically dressing of described iron-holder grade about 70%-80%, steel slag magnetically dressing and the iron-holder grade of iron-holder grade about 40%-%50% promptly gets the slag making steel scrap at 20%-30% left and right sides steel slag magnetically dressing powder.
The order number of described screening is 15 centimetres..
The stewing stove of described heat can be welded into steel plate, and shape can be cylindric, and there is slag inlet the upper end, has bell, lower end that capable of opening and closing slag notch is arranged on the slag inlet.
The present invention adopts magnetic separation slag steel to add ore, reduces the discarded pollution to environment of slag.Being used of slag steel and ore reduced the consumption of iron block, problems such as the smoke contamination when having avoided molten iron cast iron block, the waste of water resources and sewage disposal.
Embodiment
Slag after coming out of the stove 5-6 hour is poured in the stewing stove of heat of band water cooling plant, is carried out the stewing cooling of capping heat, reach room temperature after slag become tiny particle, come out of the stove, the slag after handling by the stewing stove of heat is transported to by vehicle or belt that sieve the slag field, magnetic separation.Described screening the order number be 15 centimetres..Do not cross and sieve coarse grained slag and return and carry out again that heat is stewing to be handled, the slag that sieves is transported to first magnetic separation roller by belt and carries out magnetic separation, get the slag of iron-holder grade about 70%-80%, clout is after the powerful magnetic separation roller in second road, get the slag of iron-holder grade about 40%-%50%, last clout is levigate after ball mill, selects ferruginous metal charge by magnetic separator, gets the iron-holder grade in 20%-30% left and right sides steel-making slag powder.Collect described iron-holder grade and promptly get the slag making steel scrap in 20%-30% left and right sides steel-making slag powder in the slag about 70%-80%, iron-holder grade slag and the iron-holder grade about 40%-%50%.
The stewing stove of described heat is welded into steel plate, and shape can be cylindric, and there is slag inlet the upper end, is hinged with bell on the slag inlet.There is capable of opening and closing slag notch the lower end.
According to the physics of molten iron, chemical heat, adjust the add-on of used slag making steel scrap of every stove and ore, guarantee temperature equilibrium, reduce the iron block consumption.(describe its technology and parameter in detail, answer: thus converter steelmaking is mainly carried out the process that chemical reaction reaches temperature raising, carbon elimination, desulfuration, dephosphorization by the element in top blast oxygen and the molten iron exactly, carry out in order to guarantee various successful reaction, just need can reach requirement with addition of the raw and auxiliary material slag making of some amount.Want slag making just to require in the slag suitable ferric oxide to be arranged, and the slag making steel scrap of gained of the present invention is owing to contain the required ferric oxide of steelmaking slagging, the ore of adding 10 kilograms of/ton steel is slagging fast, can reach the purpose of dephosphorization.
Under the steel-making condition, phosphorus can not be removed by the oxygen direct oxidation, has only and oxide compound (P
2O
5) combine with (CaO), generating stable complex compound, could effectively remove.Chemical equation is as follows
2[P]+5(FeO)+4(CaO)＝(4CaO·P
2O
5)+5[Fe]
2[P]+5(FeO)+3(CaO)＝(3CaO·P
2O
5)+5[Fe]
From reaction formula as can be seen, effectively dephosphorization of slag making steel scrap and ore.Can reduce the oxidation of partial molten iron in operation, returning of minimizing middle and later periods is dried, and stable operation is played and reduced the effect that consumes.By all right instead of part iron block consumption of the ore that adds slag making steel scrap and part, thereby play the purpose that reduces environmental pollution.
Claims (3)
1. method of utilizing steel-making waste residue to prepare the slag making steel scrap, it is characterized in that: the slag after will coming out of the stove 5-6 hour is poured in the stewing stove of heat of band water cooling plant, carry out the stewing cooling of capping heat, slag becomes tiny particle after reaching room temperature, come out of the stove, being transported to the slag field by the slag after the stewing stove processing of heat by vehicle or belt sieves, magnetic separation, do not cross and sieve coarse grained slag and return and carry out again that heat is stewing to be handled, the slag that sieves is transported to first magnetic separation roller by belt and carries out magnetic separation, get the steel slag magnetically dressing of iron-holder grade about 70%-80%, clout is after the powerful magnetic separation roller in second road, get the steel slag magnetically dressing of iron-holder grade about 40%-%50%, last clout is levigate after ball mill, select ferruginous metal charge by magnetic separator, get the iron-holder grade at 20%-30% left and right sides steel slag magnetically dressing powder, collect the steel slag magnetically dressing of described iron-holder grade about 70%-80%, steel slag magnetically dressing and the iron-holder grade of iron-holder grade about 40%-%50% promptly gets the slag making steel scrap at 20%-30% left and right sides steel slag magnetically dressing powder.
2. according to claim 1, it is characterized in that: the order number of described screening is 15 centimetres.
3. according to claim 1, it is characterized in that: the stewing stove of described heat can be welded into steel plate, and shape can be cylindric, and there is slag inlet the upper end, has bell, lower end that capable of opening and closing slag notch is arranged on the slag inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910075592A CN101693929A (en) | 2009-09-26 | 2009-09-26 | Method for preparing slagging scrap by using steel-making waste residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910075592A CN101693929A (en) | 2009-09-26 | 2009-09-26 | Method for preparing slagging scrap by using steel-making waste residue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101693929A true CN101693929A (en) | 2010-04-14 |
Family
ID=42092925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910075592A Pending CN101693929A (en) | 2009-09-26 | 2009-09-26 | Method for preparing slagging scrap by using steel-making waste residue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101693929A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928793A (en) * | 2010-07-22 | 2010-12-29 | 新兴铸管股份有限公司 | Steel slag treatment method |
| CN103740942A (en) * | 2014-01-13 | 2014-04-23 | 广西科穗环境科技有限公司 | Metal smelting slag separating and recycling production process |
| CN111349746A (en) * | 2018-12-24 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Process for replacing converter lime by using steelmaking tailings |
| 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 |
-
2009
- 2009-09-26 CN CN200910075592A patent/CN101693929A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928793A (en) * | 2010-07-22 | 2010-12-29 | 新兴铸管股份有限公司 | Steel slag treatment method |
| CN101928793B (en) * | 2010-07-22 | 2012-01-11 | 新兴铸管股份有限公司 | Steel slag treatment method |
| CN103740942A (en) * | 2014-01-13 | 2014-04-23 | 广西科穗环境科技有限公司 | Metal smelting slag separating and recycling production process |
| CN111349746A (en) * | 2018-12-24 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Process for replacing converter lime by using steelmaking tailings |
| 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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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
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Open date: 20100414 |