CN103031391A - Process of treating powder waste of steelmaking auxiliary material system - Google Patents
Process of treating powder waste of steelmaking auxiliary material system Download PDFInfo
- Publication number
- CN103031391A CN103031391A CN2012101745633A CN201210174563A CN103031391A CN 103031391 A CN103031391 A CN 103031391A CN 2012101745633 A CN2012101745633 A CN 2012101745633A CN 201210174563 A CN201210174563 A CN 201210174563A CN 103031391 A CN103031391 A CN 103031391A
- Authority
- CN
- China
- Prior art keywords
- slag
- steel
- powder
- converter
- auxiliary material
- 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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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
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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
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention provides a process of treating powder waste of a steelmaking auxiliary material system. Taking a converter or an electric furnace as an example, the process comprises the step of: when the slagging of the converter furnace is started, adding the powder waste containing CaO and MgO, wherein the adding speed is 120-250kg/min, the adding quantity is 8-12% of the slag quantity and the adding mode comprises the steps of opening a valve at the bottom of a stock bin of the furnace, connecting by using a steel elephant trunk with the diameter of Phi50-150mm and directly adding the powder into a slag tank. The process provided by the invention has the advantages that when the process is used in the steelmaking, the pelletizing process in the slag treatment is omitted; the slag temperature can be reduced by 25 DEG C; and the steel slag cooling and hot disintegration time can be reduced by 30-90min and the slag alkalinity can be increased to more than 1.8.
Description
Technical field
The present invention relates to the hot vexed processing of slag, make produce in the steelmaking process contain CaO and MgO powder rubbish obtains comprehensive utilization in steel slag hot disintegrating technique.
Background technology
The steel slag hot disintegrating principle is with the hot steel slag hot disintegrating device (hot vexed pond) of packing into, so that slag is cooled to 300～800 ℃, after the sealing of the vexed Chi Gai lid of heat, make when fetching water and produce a large amount of saturation steams and hot steel slag effect in the hot vexed pond, slag Free CaO (f-CaO) and free magnesium (f-MgO) and water reaction, because huge bulging force separates slag cracking, efflorescence and slag iron, and the free CaO of slag is cleared up, and reaches the purpose that slag iron separates by expansion.Slag after the processing, stable performance, eliminate the impact of free state CaO on the slag performance, depended on the temperature of slag and the content of the free calcium oxide in the middle of the slag so can be used as the effect of hot vexed treatment process of the raw material slag of slag micro powder, steel slag building block brick etc.So at present the vexed effect of high alkalinity bessemer furnace slag heat is better, and the lower bessemer furnace slag of basicity, the slag that comprises two slag melting high silicon iron water, the slag that the slag that converter dephosphorization is processed, electrosmelting produce, their hot vexed treatment effect is than the poor processing effect of the bessemer furnace slag of high alkalinity.
Petrogrpahic microscope has been analyzed the distribution of f.CaO, and the result shows that f.CaO in the slag is mainly from two aspects.The one, under 1400～1500 ℃ of high temperature because slag making and regulate basicity and the lime that adds in the steelmaking process, in converter because of surface and SiO
2Generate the Dicalcium Phosphate (Feed Grade) of infusibility, stop lime enter slag mutually in, at high temperature form dead roasting lime, the f.CaO in the slag is mainly from this respect, grain-size is about 10 μ m.The 2nd, tricalcium silicate and Dicalcium Phosphate (Feed Grade) fusing point are very high in the middle of the slag, the combining closely of their molecule, and the responseless lime of part is besieged, forms the f.CaO. grain-size about 40 μ m.In the middle of the slag of low basicity, the structure majority of petrofacies is all kinds of peridotitess, a small amount of Dicalcium Phosphate (Feed Grade) and tricalcium silicate are only arranged, the content of free calcium oxide is lower, the vexed treatment effect of heat is bad, and meanwhile, steelworks auxiliary material system produces to contain CaO every day and MgO is the powder rubbish of principal constituent, its processing never has effective technique, makes it maximizing the benefits.
Searching document discloses: " research of blast furnace blowing dedusting ash " paper publishing of (1) Yuan Xingting, Wang Xiaoming etc. is in " iron and steel " 2008(9); (2) " water steel reinforced concrete mould assembly dedusting ash is made the experimental study of bead second stage employ " paper publishing of Peng Zhijian, Zhang Bin etc. is in " mineral products comprehensive utilization "-2010 (2); (3) Ma Gangping, " Shoudu Iron and Steel Co dedusting ash specificity analysis and comprehensive utilization technique research " paper publishing of Wu Hongbin is in " industrial safety and environmental protection " the 1st phase in 2006; Above-mentioned information does not relate to for producing steelworks every day the effective processing that contains CaO and MgO powder rubbish, the main flow treatment process is to use the tank car roping to sintering plant in these powder rubbish, be sintered into pellet with the raw materials such as iron fine powder of sintering plant, then be applied to ironmaking, this technical process is long, and energy consumption is high.The present invention undergoes technological transformation as point of penetration, realizes utilization of waste material, is the energy-saving and emission-reduction of enterprise, and consumption reduction production has been made demonstration.
Summary of the invention
The object of the invention is to: for the processing of steel-making auxiliary material system powder rubbish, essence is the production that improves low basicity steel slag hot disintegrating, take full advantage of CaO and MgO powder rubbish, increased free calcium oxide and the magnesium oxide in the slag, namely shorten the hot vexed transformation time of slag, realized the best effect of powdered garbage conversion utilization ratio.
The object of the present invention is achieved like this: a kind for the treatment of process of making steel auxiliary material system powder rubbish, take converter or electric furnace as example, its step: fall slag when beginning to slag tap in converter, add the powder rubbish that contains CaO and MgO, per minute adds 120～250kg, and add-on is the 8-12% of the quantity of slag; Adding mode: open the valve of bottom, furnace charge storehouse, use the steel elephant trunk of φ 50-φ 150mm to be connected with it, directly add its powder in the slag ladle; This technique is used for steel-making, has omitted the pellet forming process that slag is processed.
Described treatment process can make low 25 ℃ of slag temperature drop, reduces slag cooling, hot vexed time 30-90min, and the basicity of slag is increased to more than 1.8; Treatment effect is very remarkable, and the time shortens 0.5 hour than traditional technology, shows technical progress.Embodiment
The present invention is described further in connection with embodiment.
Embodiment
Concrete operations:
1) in the steel-making, adopts CaO and MgO powder to be used for slag and process, omitted pellet forming process;
2) add CaO and MgO powder mode, use the steel elephant trunk of φ 100mm, the elephant trunk end opening connects the slag ladle bottom valve, and CaO and MgO powder rubbish are packed in the slag ladle;
3) adding opportunity, the valve of bin bottom is opened in the beginning of slagging tap of converter or electric furnace, CaO and MgO powder rubbish are evenly added slag ladle, slag basin, and per minute adds 200kg, and add-on is 12% of the quantity of slag, discharging is complete, and the slag roping is processed to hot vexed slag slag field.
Beneficial effect of the present invention: use to contain the powder rubbish of CaO and MgO, converter or electric furnace slagged tap implement to process, namely can reduce the slag temperature, slag cooling and vexed time of heat have been shortened again, the slag that some low basicity are not suitable for hot vexed processing also can carry out hot vexed processing by this technique, slag is processed, 5 yuan/tons of slags of cost.
Claims (2)
1. make steel the treatment process of auxiliary material system powder rubbish for one kind, it is characterized in that: take converter or electric furnace as example, its step: fall slag when beginning to slag tap in converter, add the powder rubbish that contains CaO and MgO, per minute adds 120～250kg, and add-on is the 8-12% of the quantity of slag; Adding mode: open the valve of bottom, furnace charge storehouse, use the steel elephant trunk of φ 50-φ 150mm to be connected with it, directly add its powder in the slag ladle; This technique is used for steel-making, has omitted the pellet forming process that slag is processed.
2. treatment process according to claim 1 is characterized in that: this technique can make low 25 ℃ of slag temperature drop, reduces slag cooling, hot vexed time 30-90min, and the basicity of slag is increased to more than 1.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101745633A CN103031391A (en) | 2012-05-31 | 2012-05-31 | Process of treating powder waste of steelmaking auxiliary material system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101745633A CN103031391A (en) | 2012-05-31 | 2012-05-31 | Process of treating powder waste of steelmaking auxiliary material system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103031391A true CN103031391A (en) | 2013-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101745633A Pending CN103031391A (en) | 2012-05-31 | 2012-05-31 | Process of treating powder waste of steelmaking auxiliary material system |
Country Status (1)
| Country | Link |
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| CN (1) | CN103031391A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104342524A (en) * | 2014-06-30 | 2015-02-11 | 新疆八一钢铁股份有限公司 | Harmless utilization process of stemming after application of blast furnace |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52129671A (en) * | 1976-04-26 | 1977-10-31 | Nippon Carbide Ind Co Ltd | Improvement in properties of slag |
| JPH082949A (en) * | 1994-06-17 | 1996-01-09 | Joho Sogo Kenkyusho:Kk | Method for modifying steelmaking slag |
| CN1401010A (en) * | 2000-01-28 | 2003-03-05 | 霍尔辛姆有限公司 | Method for reprocessing dust or dust mixtures |
| CN101805809A (en) * | 2010-04-22 | 2010-08-18 | 山西太钢不锈钢股份有限公司 | Method for utilizing blast furnace dust |
| CN101875997A (en) * | 2009-12-18 | 2010-11-03 | 攀枝花钢城集团有限公司 | Desulfurization slag regulator for refining steel and preparation method thereof |
| CN102382912A (en) * | 2011-11-14 | 2012-03-21 | 中冶南方工程技术有限公司 | Method for treating blast furnace slag |
-
2012
- 2012-05-31 CN CN2012101745633A patent/CN103031391A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52129671A (en) * | 1976-04-26 | 1977-10-31 | Nippon Carbide Ind Co Ltd | Improvement in properties of slag |
| JPH082949A (en) * | 1994-06-17 | 1996-01-09 | Joho Sogo Kenkyusho:Kk | Method for modifying steelmaking slag |
| CN1401010A (en) * | 2000-01-28 | 2003-03-05 | 霍尔辛姆有限公司 | Method for reprocessing dust or dust mixtures |
| CN101875997A (en) * | 2009-12-18 | 2010-11-03 | 攀枝花钢城集团有限公司 | Desulfurization slag regulator for refining steel and preparation method thereof |
| CN101805809A (en) * | 2010-04-22 | 2010-08-18 | 山西太钢不锈钢股份有限公司 | Method for utilizing blast furnace dust |
| CN102382912A (en) * | 2011-11-14 | 2012-03-21 | 中冶南方工程技术有限公司 | Method for treating blast furnace slag |
Non-Patent Citations (1)
| Title |
|---|
| 吾塔等: "炼钢除尘泥（灰）资源化利用分析", 《新疆钢铁》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104342524A (en) * | 2014-06-30 | 2015-02-11 | 新疆八一钢铁股份有限公司 | Harmless utilization process of stemming after application of blast furnace |
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Application publication date: 20130410 |