CN101956043A - Method for recycling steelmaking slag - Google Patents
Method for recycling steelmaking slag Download PDFInfo
- Publication number
- CN101956043A CN101956043A CN2010105089954A CN201010508995A CN101956043A CN 101956043 A CN101956043 A CN 101956043A CN 2010105089954 A CN2010105089954 A CN 2010105089954A CN 201010508995 A CN201010508995 A CN 201010508995A CN 101956043 A CN101956043 A CN 101956043A
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- CN
- China
- Prior art keywords
- electric furnace
- slag
- residue
- steel
- molten iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a method for recycling steelmaking slag, which comprises the following steps of: filling 2 to 3 tons of molten iron in a recovery tank after molten steel is completely poured; pouring 2 tons of slag into a steel recovery tank and adding a 50kg of covering agent into the recovery tank; conveying the recovery tank to an electric furnace procedure by a carrier vehicle; and pouring the slag and the molten iron into the electric furnace together. CaO, Al2O3 and the like are rich in the liquid slag, and the slag instead of limestone can be used for dephosphorization and desulfuration after being poured into the electric furnace, so that limestone consumption can be reduced, heat in the slag is effectively recycled, the electric power consumption of the electric furnace is reduced, and the pollution of the environment is avoided.
Description
Technical field:
After the present invention relates to pouring molten steel, a kind of recoverying and utilizing method of residual residue.
Background technology:
In the production process of steel-making, pouring molten steel finishes, and still contains a large amount of CaO, SiO in the remaining liquid hot-engine sludge in the ladle
2, Al
2O
3, MgO etc., by analysis: the average content of CaO is 20%, Al
2O
3Average content be 20%, the average content of MgO is 9%.Handle as waste at last after the liquid residue cooling.Not only cause residue heat and CaO, Al after the processing
2O
3Deng the loss of composition, also environment is caused certain pollution.
Summary of the invention:
In order to reduce production costs, make full use of heat and CaO, Al in the residue
2O
3, reduce the power consumption of electric furnace simultaneously, the invention provides a kind of recoverying and utilizing method of making steel residue.
Technical scheme of the present invention is: pouring molten steel finishes, and earlier holds 2-3 ton molten iron reclaiming bag, after pour 2 tons of residues into the recovery ladle, add insulating covering agent 50kg, reclaim bag and be transported to the electric furnace operation through transport trolley, pour residue and molten iron into electric furnace together.
The parameter of described insulating covering agent is: CaO requires 10-20%, AL
2O
3Require 10-25%, SiO
2Require 35-45%, C content＜15%, fusing point are 1250 ℃, unit weight＜0.60/cm.
Because the residue temperature is lower, the etch bricking is slight, and the used recovery bag of the present invention adopts is built by laying bricks or stones by the little unselected clay matter cylinder-packing of thermal conductivity, and not only thermal conductivity is little to adopt unselected clay, and is difficult for the steel bonding slag.
Owing to still be rich in CaO, Al in the residue
2O
3Deng, and be liquid, can carry out dephosphorization, desulfurization by replacing lime stone after pouring electric furnace into, reduced the consumption of Wingdale, the heat in the residue also obtains effective recycling simultaneously, has reduced the power consumption of electric furnace, has avoided the pollution to environment.
Every index of beneficial effect of the present invention is as follows:
1, reduce consumption of limestone: through experiment, 1 ton of residue of every recovery, (the refining slag composition is CaO:50%, SiO to consume Wingdale 200kg less
2: 15%, it is 2 that electric furnace finally becomes basicity of slag, then above contribution CaO is: 20%).The annual Wingdale cost F that reduces:
F=200 ÷ 1000 * every stove reclaims average recovery furnace number in level of residue * every year * lime unit price
=200 ÷ 1000 * 2 * 500 * 520=104 (ten thousand yuan)
2, reclaim the residue heat and reduce energy consumption of electric furnace:
Q＝(CPmΔt)+m×C＝1.247×2000×1475+2000×209KJ/Kg
＝4096650(kJ)
In the following formula: CP: slag specific heat, CP=1.247KJ/Kg ℃; M: melt cinder weight, m=2000Kg;
Δ t: slag is temperature head when liquid and the normal temperature state of cooling, Δ t1=1500-25=1475 (℃);
C: slag latent heat, C:209KJ/Kg.
Melt cinder can be contributed heat: 4096650kJ when stove after reclaiming and being blended into electric furnace, tears open and closes: 1137.96kwh.
Consider that withdrawing can absorbs heat, the actual heat that enters electric furnace calculates by 80%, and according to producing the stove number per year, can reduce power consumption cost J every year:
J=1137.96 * 80% * 6000 * 0.33=180.3 (ten thousand yuan)
More than two add up to benefits to be: ten thousand yuan of 104+180.3=284.3
Embodiment:
Embodiment: the average residual level of residue is 2t in the ladle of every stove cast back, reclaiming the bag employing is built by laying bricks or stones by the little unselected clay matter cylinder-packing of thermal conductivity, recovery is poured molten iron 2-3t into earlier before wrapping in and reclaiming residue in bag, then residue in the ladle is poured into and reclaimed bag, after residue is poured into, add insulating covering agent 50kg, further strengthen the insulation of residue, reclaim bag and be transported to the electric furnace operation, pour residue and molten iron into electric furnace together through transport trolley.
The parameter of described insulating covering agent is: CaO requires 10-20%, AL
2O
3Require 10-25%, SiO
2Require 35-45%, C content＜15%, fusing point are 1250 ℃, unit weight＜0.60/cm.
Claims (2)
1. make steel the recoverying and utilizing method of residue for one kind, it is characterized in that pouring molten steel finishes, hold 2-3 ton molten iron reclaiming bag earlier, after pour 2 tons of residues into the recovery ladle, add insulating covering agent 50kg, reclaim bag and be transported to the electric furnace operation, pour residue and molten iron into electric furnace together through transport trolley.
2. a kind of recoverying and utilizing method of making steel residue according to claim 1 is characterized in that described recovery bag adopts unselected clay matter cylinder-packing to build by laying bricks or stones.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105089954A CN101956043A (en) | 2010-10-13 | 2010-10-13 | Method for recycling steelmaking slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105089954A CN101956043A (en) | 2010-10-13 | 2010-10-13 | Method for recycling steelmaking slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101956043A true CN101956043A (en) | 2011-01-26 |
Family
ID=43483627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105089954A Pending CN101956043A (en) | 2010-10-13 | 2010-10-13 | Method for recycling steelmaking slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101956043A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103361468A (en) * | 2013-07-15 | 2013-10-23 | 芜湖新兴铸管有限责任公司 | Treatment method for continuous casting of thermal steel slag |
| CN109112252A (en) * | 2018-10-05 | 2019-01-01 | 若羌县圣地石棉尾料再利用科技开发有限公司 | A kind of method that electric furnace utilizes smelting of metal particle ferroalloy and special steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240145A (en) * | 2004-02-27 | 2005-09-08 | Jfe Steel Kk | Method for desulfurizing molten pig iron |
| CN1789431A (en) * | 2005-12-10 | 2006-06-21 | 江苏沙钢集团有限公司 | Method for reclaiming residue steel and slag of molten steel container |
| CN101403021A (en) * | 2008-11-08 | 2009-04-08 | 山西太钢不锈钢股份有限公司 | Utilization method for steel scoria |
-
2010
- 2010-10-13 CN CN2010105089954A patent/CN101956043A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240145A (en) * | 2004-02-27 | 2005-09-08 | Jfe Steel Kk | Method for desulfurizing molten pig iron |
| CN1789431A (en) * | 2005-12-10 | 2006-06-21 | 江苏沙钢集团有限公司 | Method for reclaiming residue steel and slag of molten steel container |
| CN101403021A (en) * | 2008-11-08 | 2009-04-08 | 山西太钢不锈钢股份有限公司 | Utilization method for steel scoria |
Non-Patent Citations (2)
| Title |
|---|
| 《冶金保护材料理论与实践》 20051231 王兆达 碱性钢包覆盖剂 95 1-2 , * |
| 《冶金保护材料理论与实践》 20051231 王兆达 碱性钢包覆盖剂 95 1-2 , 1 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103361468A (en) * | 2013-07-15 | 2013-10-23 | 芜湖新兴铸管有限责任公司 | Treatment method for continuous casting of thermal steel slag |
| CN103361468B (en) * | 2013-07-15 | 2015-07-29 | 芜湖新兴铸管有限责任公司 | A kind for the treatment of process of continuous casting hot steel slag |
| CN109112252A (en) * | 2018-10-05 | 2019-01-01 | 若羌县圣地石棉尾料再利用科技开发有限公司 | A kind of method that electric furnace utilizes smelting of metal particle ferroalloy and special steel |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110126 |