CN100432242C - Ladle slag modified aluminium slag pellet - Google Patents
Ladle slag modified aluminium slag pellet Download PDFInfo
- Publication number
- CN100432242C CN100432242C CNB2006100977002A CN200610097700A CN100432242C CN 100432242 C CN100432242 C CN 100432242C CN B2006100977002 A CNB2006100977002 A CN B2006100977002A CN 200610097700 A CN200610097700 A CN 200610097700A CN 100432242 C CN100432242 C CN 100432242C
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- slag
- aluminium
- steel
- pellet
- ladle
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Abstract
The invention discloses a steel color-slag property improving method to smelt pure steel and hyper-pure steel, which is characterized by the following: adsorbing impurity to remove; reducing production oxygen; controlling the impurity with metal aluminium, dialuminum trioxide, sodium carbonate and calcium oxide; modulating water content; avoiding boiling phenomenon for material in the molten steel; obtaining the product without F-; protecting environment and equipment.
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 the refining pre-treatment additive of steel finished product total oxygen.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.When molten steel enters refining furnace, can reach behind the adding ladle slag modified aluminium slag pellet and improve the ladle slag proterties, 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, reaches pure for making molten steel, and it is assorted that the molten steel degree of depth is taken off, but taking off assorted condition must carry out deoxidation treatment to molten steel, and 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.Chinese patent CN1752221 discloses a kind of " modified aluminium slag ball of refining slag and preparation method thereof " and has solved above-mentioned technical problem preferably, but Calcium Fluoride (Fluorspan) has stronger corrodibility to the furnace wall, influences the work-ing life of steelmaking equipment.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of proterties of improving ladle slag when being used to smelt Clean Steel and ultra-clean steel refining treatment is provided, help the absorption and the removal of inclusion, can further reduce the finished product total oxygen, the ladle slag modified aluminium slag pellet that detrimental impurity content is extremely low, can overcome again in the existing aluminium slag ball simultaneously has stronger corrosive deficiency because of containing Calcium Fluoride (Fluorspan) to the furnace wall.
The technical solution adopted for the present invention to solve the technical problems is: a kind of ladle slag modified aluminium slag pellet, it contains metallic aluminium (Al), aluminium sesquioxide (Al
2O
3), lime carbonate (CaCO
3), calcium oxide (CaO) and silicon-dioxide (SiO
2), moisture content (H
2O), sulphur (S), phosphorus (P), its component content is by weight percentage: aluminium 48～52, aluminium sesquioxide 10～15, lime carbonate 18～22, calcium oxide 8～12, silicon-dioxide≤7, moisture content≤0.5.
The preparation method of above-mentioned ladle slag modified aluminium slag pellet has following technical process: starting material are prepared, and are respectively by the component concentration weight percent of each raw-material Chemical Composition:
Aluminium powder: Al 〉=95%, Cu≤1%, Si≤3%;
Aluminium ground-slag: Al
2O
3〉=50%, SiO
2≤ 5%;
Calcium oxide: CaO 〉=98%, SiO
2≤ 1%;
Limestone powder: CaCO
3〉=95%, SiO
2≤ 5% requirement, with metallic aluminium powder, the aluminium ground-slag, the fluorite powder, limestone powder, the bath of glass buying puts in place, divide storage to deposit, the starting material weighing and proportioning that chemical examination is qualified, drop into then in the rotary drum mixer and mix, adding degree Beaume again is the bath of glass 9-12% of 37-42, continuously stirring mixes in the twin screws stirrer, immediately material is dropped into roll extrusion balling-up in the pair roller type ball press then, sieve qualified grade and enter in the air cooking equipment air cooking 20-24 hour with 150 ℃-200 ℃, behind finished product moisture content≤0.5%, naturally cooling 10-12 hour, screening, packing, warehouse-in.
Beneficial effect of the present invention when ladle slag modified aluminium slag pellet of the present invention enters in the ladle, because spherical material has good flowability, thereby can form tectum at molten steel surface rapidly.Molten steel and air are formed sealing coat, and lime carbonate at first resolves into 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.Add ladle slag modified aluminium slag pellet of the present invention in the ladle, can improve the flowability of slag in the stove; Reduce all iron content in the slag, reduce aluminium-calcium-rate, improve and adsorb Al in the ladle slag
2O
3Performance, reduce finished product total oxygen in the molten steel, significantly reduce oxide inclusion in the molten steel, simultaneously because of not containing F
-, therefore can not corrode the furnace wall, improved the work-ing life of steelmaking equipment, can pollutant atmosphere and infringement operative employee healthy.
Embodiment
A kind of ladle slag modified aluminium slag pellet, it contains metallic aluminium (Al), aluminium sesquioxide (Al
2O
3), lime carbonate (CaCO
3), calcium oxide (CaO) and silicon-dioxide (SiO
2), moisture content (H
2O), sulphur (S), phosphorus (P), its component content is by weight percentage: aluminium 48～52, aluminium sesquioxide 10～15, lime carbonate 18～22, calcium oxide 8～12, silicon-dioxide≤7, moisture content≤0.5.
The preparation method of above-mentioned ladle slag modified aluminium slag pellet has following technical process: raw-material preparation is respectively by the component content weight percent of various raw-material chemical formula compositions:
Aluminium powder: Al 〉=95%, Cu≤1%, Si≤3%;
Aluminium ground-slag: Al
2O
3〉=50%, SiO
2≤ 5%;
Calcium oxide: CaO 〉=98%, SiO
2≤ 1%;
Limestone powder: CaCO
3〉=95%, SiO
2≤ 5%
Requirement metallic aluminium powder, aluminium ground-slag, calcium oxide, limestone powder 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%;
Aluminium ground-slag: Al
2O
365.52%, SiO
23.1%;
Calcium oxide: CaO 98.26%, SiO
20.52%;
Limestone powder: CaCO
396.3%, SiO
20.52%.
The preparation ladle slag modified aluminium slag pellet, the qualified starting material of chemical examination are weighed: aluminium powder 500Kg, aluminium ground-slag 170Kg, calcium oxide 100Kg, limestone powder 215Kg, to mix 15 minutes to mixing in the above-mentioned raw material input rotary drum mixer of weighing, the input degree Beaume is 37 bath of glass 50Kg in the material that mixes, and mix is even in the twin screws stirrer, the uniform material of mix is rolled into the spherical particle of 10-20mm in the pair roller type ball press, with the spherical particle input is in the drying plant of fuel with the coke, 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?11.03％，CaO?9.82％，CaCO
3?20.7％，SiO
2?3.16％，H
2O?0.15％。
The test application examples: ladle slag modified aluminium slag pellet of the present invention, two steel-making 3#RH operations are carried out the ladle slag modified aluminium slag pellet test in Shanghai Baosteel company.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 ladle slag modified aluminium slag pellet, 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 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 (1)
1. ladle slag modified aluminium slag pellet, it contains metallic aluminium, aluminium sesquioxide, lime carbonate, calcium oxide and silicon-dioxide and a spot of moisture content, sulphur, phosphorus, it is characterized in that its component content is by weight percentage: aluminium 48～52, aluminium sesquioxide 10～15, lime carbonate 18～22, calcium oxide 8～12, silicon-dioxide≤7, moisture content≤0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100977002A CN100432242C (en) | 2006-11-20 | 2006-11-20 | Ladle slag modified aluminium slag pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100977002A CN100432242C (en) | 2006-11-20 | 2006-11-20 | Ladle slag modified aluminium slag pellet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1962888A CN1962888A (en) | 2007-05-16 |
| CN100432242C true CN100432242C (en) | 2008-11-12 |
Family
ID=38082114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100977002A Expired - Fee Related CN100432242C (en) | 2006-11-20 | 2006-11-20 | Ladle slag modified aluminium slag pellet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100432242C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555539B (en) * | 2009-05-19 | 2010-11-03 | 鞍山市量子炉材集团有限公司 | Al-Ca-Fe complex deoxidizer and preparation method thereof |
| CN109554518B (en) * | 2017-09-27 | 2020-10-27 | 鞍钢股份有限公司 | Deoxidizer for purifying molten steel by rotary blowing and use method thereof |
| CN108103269A (en) * | 2017-12-18 | 2018-06-01 | 天津基纳科技发展有限公司 | A kind of aluminium slag ball of high calcium containing chromium and preparation method thereof |
| CN108004371A (en) * | 2017-12-18 | 2018-05-08 | 天津基纳科技发展有限公司 | A kind of high calcium aluminium slag ball and preparation method thereof |
| CN108004372A (en) * | 2017-12-18 | 2018-05-08 | 天津基纳科技发展有限公司 | High calcium aluminium slag ball and preparation method thereof |
| CN108103267A (en) * | 2017-12-18 | 2018-06-01 | 天津基纳科技发展有限公司 | A kind of nickeliferous high calcium aluminium slag ball and preparation method thereof |
| CN114214482B (en) * | 2021-12-01 | 2022-12-06 | 钢城集团凉山瑞海实业有限公司 | Pellet for adsorbing aluminum oxide inclusion in steel ladle molten steel |
| CN115537498B (en) * | 2022-09-30 | 2024-03-01 | 安徽工业大学 | Method for rapidly making white slag from silicon-aluminum-containing killed steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156341A (en) * | 1990-12-21 | 1993-06-22 | Kawasaki Steel Corp | Production of al-killed steel |
| JPH08176644A (en) * | 1994-10-25 | 1996-07-09 | Sumitomo Metal Ind Ltd | Manufacture of low sulfur steel with reduced killing time |
| CN1752221A (en) * | 2005-10-11 | 2006-03-29 | 梅一峰 | Modified aluminium slag ball of refining slag and preparing method thereof |
| CN1775961A (en) * | 2005-10-11 | 2006-05-24 | 梅一峰 | Prefused refined slag modified aluminium slag ball and its preparing method |
-
2006
- 2006-11-20 CN CNB2006100977002A patent/CN100432242C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156341A (en) * | 1990-12-21 | 1993-06-22 | Kawasaki Steel Corp | Production of al-killed steel |
| JPH08176644A (en) * | 1994-10-25 | 1996-07-09 | Sumitomo Metal Ind Ltd | Manufacture of low sulfur steel with reduced killing time |
| CN1752221A (en) * | 2005-10-11 | 2006-03-29 | 梅一峰 | Modified aluminium slag ball of refining slag and preparing method thereof |
| CN1775961A (en) * | 2005-10-11 | 2006-05-24 | 梅一峰 | Prefused refined slag modified aluminium slag ball and its preparing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1962888A (en) | 2007-05-16 |
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