CN100422349C - Prefused refined slag modified aluminium slag ball and its preparing method - Google Patents
Prefused refined slag modified aluminium slag ball and its preparing method Download PDFInfo
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- CN100422349C CN100422349C CNB2005100948240A CN200510094824A CN100422349C CN 100422349 C CN100422349 C CN 100422349C CN B2005100948240 A CNB2005100948240 A CN B2005100948240A CN 200510094824 A CN200510094824 A CN 200510094824A CN 100422349 C CN100422349 C CN 100422349C
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- slag
- aluminium
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- modified aluminium
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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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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a modified aluminium slag ball of premelting type refining slag and a preparing method thereof. The modified aluminium slag ball of premelting type refining slag is used for improving the characteristics of steel slag in refining treatment in pure steel and ultrapure steel smelting and is favorable for adsorbing and removing impurities, reducing the total oxygen of finished products, and the content of harmful impurities is low. The modified aluminium slag ball of premelting type refining slag comprises metallic aluminium, aluminium oxide, calcium oxide, magnesium oxide, sodium oxide, silicon dioxide and water, and due to the control of the contents of silicon, sulfur and phosphorus, the modified aluminium slag ball of premelting type refining slag is especially suitable for smelting pure steel and ultrapure steel. Due to the control of the water content, the bumping phenomenon of material into molten steel is avoided. Raw material is common and is easy to obtain, and the modified aluminium slag ball of premelting type refining slag has the advantages of simple and reliable balling technology, no composition aliquation and fluctuation, simple adding technology, and favorable spreading and heat insulating performance on molten steel surfaces. If added in refining treatment, the modified aluminium slag ball of premelting type refining slag can improve the fluidity of furnace slag, reduce the total iron content in slag, reduce the ratio of aluminum to calcium, improve the Al2O3 adsorbing performance in premelting type refining slag, reduce the total oxygen of finished products in molten steel and greatly reduce oxide impurities in molten steel.
Description
Technical field
The invention belongs to outer processing of molten steel stove and refining pre-treatment alloying process, be specifically related to a kind of molten steel be carried out Alloying Treatment and the proterties of ladle slag when improving refining treatment, help the absorption and the removal of inclusion, further reduce refining pre-treatment additive---the Prefused refined slag modified aluminium slag ball of steel finished product total oxygen, and the preparation method of Prefused refined slag modified aluminium slag ball.Especially for smelting steel grade ultra low-carbon steel and the various Clean Steel or the ultra-clean steel of target call arranged for finished product oxygen.Improve the ladle slag proterties when molten steel enters can reach after refining furnace adds Prefused refined slag modified aluminium slag ball, improve the slag dross inclusion adsorption, and reduce the purpose of finished product total oxygen in the molten steel.
Background technology
As everyone knows, along with the day by day raising of development and national economy to steel grade and specification of quality thereof, the smelting technology of molten steel also progressively improves on original basis and improves.To obtain the steel grade of expection kind and quality.In steel-making, the pre-process and post-process that molten steel enters refining procedure is most important, for making molten steel reach pure, it is assorted that the molten steel degree of depth is taken off, must carry out strong oxygen blast to molten steel but take off assorted condition, make the oxidation of impurities slagging come-up in the molten steel, but the oxygen level in the while molten steel rise, must carry out deoxidation treatment to molten steel again, cheap again reductor commonly used is a metallic aluminium.The processing that the molten steel degree of depth is taken off assorted product and interposition slag is gordian technique and the difficulty in the steel making working procedure especially.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of proterties of improving steel dreg when being used to smelt Clean Steel and ultra-clean steel refining treatment, help the absorption and the removal of inclusion, can further reduce the finished product total oxygen, the Pre-melting refining slag-based modification of aluminum slag ball and preparation methods that detrimental impurity content is extremely low.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Prefused refined slag modified aluminium slag ball, it contains metallic aluminium (Al), aluminium sesquioxide (Al
2O
3), calcium oxide (CaO), magnesium oxide (MgO), sodium oxide (Na
2O) and silicon-dioxide (SiO
2), moisture content (H
2O), its component content is by weight percentage: aluminium 48～52, aluminium sesquioxide 10～15, calcium oxide 10～15, sodium oxide 2～5, magnesium oxide≤2, silicon-dioxide≤7, moisture content≤0.5.
The preparation method of above-mentioned Prefused refined slag modified aluminium slag ball, have following technical process: a. starting material are prepared, the component content of the Chemical Composition with sampling analysis after qualified is Al 〉=95% by weight percentage, Cu≤1%, the component content of the metallic aluminium powder of Si≤3%, Chemical Composition are Al by weight percentage
2O
3〉=80%, SiO
2The component content of≤15% calcined bauxite in powder, Chemical Composition is CaF by weight percentage
2〉=98%, SiO
2≤ 1% fluorite powder, the component content of Chemical Composition are CaCO by weight percentage
3〉=95%, SiO
2The component content of≤5% limestone powder, Chemical Composition is Na by weight percentage
2CO
3The component content of 〉=98% soda ash, Chemical Composition puts in place for the buying of the magnesia of MgO 〉=90% and bath of glass by weight percentage and divides storage to deposit; B. the preparation of pre-melt material, calcined bauxite in powder, limestone powder, soda ash, magnesia weighing and proportioning that chemical examination is qualified, mix, the bath of glass 9-12% that in the material that mixes, adds degree Beaume 37-42, be pressed into block after stirring or spherical material, drop in the calciner again fire, fuse come out of the stove, cool off after on request grade powder process become pre-melt material; C. with metallic aluminium powder and pre-melt material system Prefused refined slag modified aluminium slag ball, metallic aluminium powder that chemical examination is qualified and pre-melt material weighing and proportioning, mixing back adding degree Beaume is the bath of glass 9-12% of 37-42, immediately material is dropped into roll extrusion balling-up in the pair roller type ball press after mixing, sieve qualified grade and enter in the roasting plant air cooking 20-24 hour with 150 ℃～200 ℃, finished product moisture content is less than 0.5% back naturally cooling 10-12 hour, screening, packing, warehouse-in.
The invention has the beneficial effects as follows,,, thereby can form tectum at molten steel surface rapidly because spherical material has good flowability when Prefused refined slag modified aluminium slag ball of the present invention enters in the ladle.Molten steel and air are formed sealing coat, and the calcium oxide in the material plays the effect of objectionable impuritiess such as the sulphur removed in the molten steel, phosphorus.The metallic aluminium while of material reacts with the oxygen in the molten steel, plays the effect to deoxidation of molten steel.The impurity slagging floats in deoxidation products and the molten steel simultaneously, and the application of material embodies good washery slag ability especially.After adding Prefused refined slag modified aluminium slag ball, the flowability of slag is improved in the stove.All iron content further descends in the slag, and aluminium-calcium-rate also further descends.Adsorb Al in the refining slag
2O
3Performance be improved, the finished product total oxygen has obtained significant reduction in the molten steel, oxide inclusion significantly reduces in the molten steel.
Embodiment
A kind of Prefused refined slag modified aluminium slag ball, it contains metallic aluminium (Al), aluminium sesquioxide (Al
2O
3), calcium oxide (CaO), magnesium oxide (MgO), sodium oxide (Na
2O) and silicon-dioxide (SiO
2), moisture content (H
2O), its component content is by weight percentage: aluminium 48～52, aluminium sesquioxide 10～15, calcium oxide 10～15, sodium oxide 2～5, magnesium oxide≤2, silicon-dioxide≤7, moisture content≤0.5.
The preparation method of above-mentioned Prefused refined slag modified aluminium slag ball has following technical process:
A. raw-material preparation:
Component content weight percent by various raw-material chemical formula compositions is respectively:
Aluminium powder: Al 〉=95%, Cu≤1%, Si≤3%;
Calcined bauxite in powder: Al
2O
3〉=80%, SiO
2≤ 15%;
Fluorite powder: CaF
2〉=98%, SiO
2≤ 1%;
Limestone powder: CaCO
3〉=95%, SiO
2≤ 5%;
Soda ash: Na
2CO
3〉=98%;
Magnesia: MgO 〉=90%
Requirement, metallic aluminium powder, calcined bauxite in powder, fluorite powder, limestone powder, soda ash, magnesia and bath of glass purchased respectively to put in place respectively store, to the starting material sampling analysis, each raw-material chemical composition is respectively:
Aluminium powder: Al 98.5%, Cu 0.3%, Si 0.42%;
Calcined bauxite in powder: Al
2O
385.3%, SiO
210.78%;
Fluorite powder: CaF
298.26%, SiO
20.52%;
Limestone powder: CaCO
396.3%, SiO
21.54%.
Soda ash: Na
2CO
3〉=98.51%;
Magnesia: MgO 〉=95.6%.
B. the preparation of pre-melt material:
The qualified starting material of chemical examination are weighed: calcined bauxite in powder 370Kg, limestone powder 160Kg, fluorite powder 300Kg, soda ash 150Kg, magnesia 20Kg, to mix 15 minutes to mixing in the above-mentioned starting material input rotary drum mixer of weighing, the input degree Beaume is 37 bath of glass 50Kg-60Kg in the material that mixes, and stir, the uniform material of mix is dropped into the blocky-shaped particle that is rolled into 20-30mm in the pair roller type ball press, enter in the middle frequency furnace after the oven dry and fire, fuse, the cooling back of coming out of the stove is by grade requirement powder process.Warehouse-in stores.
The Chemical Composition component content of pre-melt material is by weight percentage:
Al
2O
3?28.36％、CaO?30.5％、Na
2O?9.5％、MgO?1.4％、SiO
2?9.38％。
C. with metallic aluminium powder and pre-melt material system Prefused refined slag modified aluminium slag ball:
The qualified starting material of chemical examination are weighed: aluminium powder 500Kg, pre-melt material 485Kg, to mix 15 minutes to mixing in the above-mentioned starting material input rotary drum mixer of weighing, the input degree Beaume is 37 bath of glass 50Kg in the material that mixes, and in stirrer, stir, the material that stirs is dropped into the spherical particle that is rolled into 10-12mm in the pair roller ball press immediately, spherical particle is dropped in the drying plant, with the oven dry of the hot blast of 200 ℃ of left and right sides temperature through 20-24 hour, treat that finished product moisture content is less than after 0.5%, naturally cooling 10-12 hour, screen once more, packing, warehouse-in.
The finished product Chemical Composition component content of above embodiment is by weight percentage:
Al?49.25％，Al
2O
3?13.75％，CaO?14.78％，Na
2O?4.61％，MgO?0.68％，SiO
2?5.72％，H
2O?0.13％。
The test application examples: the Prefused refined slag modified aluminium slag ball of the present invention's preparation, carry out the Prefused refined slag modified aluminium slag ball test from March 30,2005 on the 15th January in 2004 in Shanghai Baosteel company two steel-making RH operations.Test objective is the proterties of ladle slag when improving refining treatment, helps the absorption and the removal of inclusion, further reduces the finished product total oxygen.Show from process of the test and data results: after adding Prefused refined slag modified aluminium slag ball, the flowability of slag was improved during RH handled, and all iron content in the slag further descends, and the aluminium-calcium-rate after RH handles has obtained decline, adsorbs Al in the pre-molten refining slag
2O
3Performance be improved, reached intended purposes, effect is very remarkable.
In each composition of the present invention, the index of other composition except that aluminium can not influence salient features according to the customer requirements appropriate change.
Claims (2)
1. Prefused refined slag modified aluminium slag ball, it contains metallic aluminium, aluminium sesquioxide, calcium oxide, magnesium oxide, sodium oxide and silicon-dioxide, moisture content, it is characterized in that its component content is by weight percentage: aluminium 48～52, aluminium sesquioxide 10～15, calcium oxide 10～15, sodium oxide 2～5, magnesium oxide≤2, silicon-dioxide≤7, moisture content≤0.5.
2. according to the preparation method of the described Prefused refined slag modified aluminium slag ball of claim 1, it is characterized in that having following technical process: a. starting material are prepared, the component content of the Chemical Composition with sampling analysis after qualified is Al 〉=95% by weight percentage, Cu≤1%, the component content of the metallic aluminium powder of Si≤3%, Chemical Composition are Al by weight percentage
2O
3〉=80%, SiO
2The component content of≤15% calcined bauxite in powder, Chemical Composition is CaF by weight percentage
2〉=98%, SiO
2≤ 1% fluorite powder, the component content of Chemical Composition are CaCO by weight percentage
3〉=95%, SiO
2The component content of≤5% limestone powder, Chemical Composition is Na by weight percentage
2O
3The component content of 〉=98% soda ash, Chemical Composition puts in place for the buying of the magnesia of MgO 〉=90% and bath of glass by weight percentage and divides storage to deposit; B. the preparation of pre-melt material, calcined bauxite in powder, limestone powder, soda ash, magnesia weighing and proportioning that chemical examination is qualified, mix, the bath of glass 9-12% that in the material that mixes, adds degree Beaume 37-42, be pressed into block after stirring or spherical material, drop in the calciner again fire, fuse come out of the stove, cool off after on request grade powder process become pre-melt material; C. with metallic aluminium powder and pre-melt material system Prefused refined slag modified aluminium slag ball, metallic aluminium powder that chemical examination is qualified and pre-melt material weighing and proportioning, mixing back adding degree Beaume is the bath of glass 9-12% of 37-42, immediately material is dropped into roll extrusion balling-up in the pair roller type ball press after mixing, sieve qualified grade and enter in the roasting plant air cooking 20-24 hour with 150 ℃～200 ℃, finished product moisture content is less than 0.5% back naturally cooling 10-12 hour, screening, packing, warehouse-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100948240A CN100422349C (en) | 2005-10-11 | 2005-10-11 | Prefused refined slag modified aluminium slag ball and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100948240A CN100422349C (en) | 2005-10-11 | 2005-10-11 | Prefused refined slag modified aluminium slag ball and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1775961A CN1775961A (en) | 2006-05-24 |
| CN100422349C true CN100422349C (en) | 2008-10-01 |
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ID=36765679
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|---|---|---|---|
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432242C (en) * | 2006-11-20 | 2008-11-12 | 梅才平 | Ladle slag modified aluminium slag pellet |
| CN102071285B (en) * | 2010-05-04 | 2012-09-05 | 陈兰君 | Molten steel refining purification assisting agent and preparation method thereof |
| CN102002550A (en) * | 2010-12-09 | 2011-04-06 | 湖南华菱湘潭钢铁有限公司 | Slag modifier for converter refining |
| CN102586543B (en) * | 2011-01-12 | 2013-12-25 | 宝山钢铁股份有限公司 | Steel ladle slag reducing agent with high calcium oxide content, and preparation method thereof |
| US20120291591A1 (en) * | 2011-05-16 | 2012-11-22 | Weixue Xiao | Agent for steel-making formed by aluminum-making slag |
| CN102586544B (en) * | 2012-03-20 | 2014-04-09 | 西峡县恒基冶材有限公司 | High-calcium pre-molten slag modification aluminium slag ball and preparation method thereof |
| CN105543446A (en) * | 2015-12-21 | 2016-05-04 | 北京安泰永盛金属材料有限公司 | High-calcium-aluminum slag ball and preparing method thereof |
| CN105821178B (en) * | 2016-03-24 | 2018-03-06 | 首钢总公司 | The smelting process of ultra-low-carbon steel |
| CN106591538A (en) * | 2016-12-02 | 2017-04-26 | 青岛特殊钢铁有限公司 | Environmental-protecting and energy-saving premelting refining slag conditioning agent |
| CN108118112B (en) * | 2017-12-22 | 2020-11-10 | 马鞍山中科冶金材料科技有限公司 | Calcium-magnesium pre-melting base aluminum molten steel purifying agent and preparation method thereof |
| CN114540578A (en) * | 2022-01-28 | 2022-05-27 | 商丘市商鼎耐火材料有限公司 | Refining slag special for silicon steel molten steel and preparation method and application thereof |
| CN115125446A (en) * | 2022-06-28 | 2022-09-30 | 浙江伊思灵双第弹簧有限公司 | High-fatigue-performance spring for automobile and preparation method thereof |
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| KR950010171B1 (en) * | 1993-12-18 | 1995-09-11 | 포항종합제철주식회사 | Making method of high purity steel |
| CN1201072A (en) * | 1998-04-07 | 1998-12-09 | 幸超 | Aluminium-contained premelting slag and preparation method therefor, and molten steel desulfurizer and purifier containing same |
| CN1410556A (en) * | 2002-10-17 | 2003-04-16 | 江苏江南铁合金有限公司 | Aluminium slag ball and its preparation method |
| CN1521279A (en) * | 2003-01-27 | 2004-08-18 | 梅一峰 | High alumina slag ball and preparing method thereof |
-
2005
- 2005-10-11 CN CNB2005100948240A patent/CN100422349C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950010171B1 (en) * | 1993-12-18 | 1995-09-11 | 포항종합제철주식회사 | Making method of high purity steel |
| CN1201072A (en) * | 1998-04-07 | 1998-12-09 | 幸超 | Aluminium-contained premelting slag and preparation method therefor, and molten steel desulfurizer and purifier containing same |
| CN1410556A (en) * | 2002-10-17 | 2003-04-16 | 江苏江南铁合金有限公司 | Aluminium slag ball and its preparation method |
| CN1521279A (en) * | 2003-01-27 | 2004-08-18 | 梅一峰 | High alumina slag ball and preparing method thereof |
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|---|---|
| CN1775961A (en) | 2006-05-24 |
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Assignee: Changzhou ChangWu charging Co., Ltd Assignor: Mei Yifeng Contract fulfillment period: 2008.10.3 to 2015.10.14 Contract record no.: 2008320000664 Denomination of invention: Prefused refined slag modified aluminium slag ball and its preparing method Granted publication date: 20081001 License type: Exclusive license Record date: 2008.10.9 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.3 TO 2015.10.14; CHANGE OF CONTRACT Name of requester: CHANGZHOU CHANGWU CHARGING CO., LTD. Effective date: 20081009 |
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