CN101993976B - Aluminium killed steel refined deoxidizing and desulfurizing synthetic slag - Google Patents
Aluminium killed steel refined deoxidizing and desulfurizing synthetic slag Download PDFInfo
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- CN101993976B CN101993976B CN 200910013119 CN200910013119A CN101993976B CN 101993976 B CN101993976 B CN 101993976B CN 200910013119 CN200910013119 CN 200910013119 CN 200910013119 A CN200910013119 A CN 200910013119A CN 101993976 B CN101993976 B CN 101993976B
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Abstract
The invention discloses aluminium killed steel refined deoxidizing and desulfurizing synthetic slag. A mixture is prepared from the following chemical components in weight percentage: 35-60 percent of CaO+BaO, 5-10 percent of CaF2, 10-30 percent of Al and 20-30 percent of Mg, wherein BaO accounts for 0-10 percent of the total weight percentage of the slag, and the proportion of Mg to Al is 1-1.5.The synthetic slag is convenient and easy to use and has a good deoxidizing effect, can reduce S in liquid steel to be less than 20*10<-6> and has a stable desulfurizing effect. The liquid steel does not resulfurize, the impurity content in the steel is low and a water gap is not blocked if continuous casting is carried out. The invention has simple method of application, obvious liquid steel deoxidizing and desulfurizing effect, obvious effect of reducing the impurity content in the steel and is suitable for producing high-quality clean steel.
Description
Technical field
The invention belongs to refining techniques field in the STEELMAKING PRODUCTION, particularly the refinement and deoxidation of aluminium killed steel, desulfurization are handled, and it has makes deoxidation of molten steel, desulfurization and reduction inclusion content of steel, prevent the effect that continous casting sprue blocks.
Background technology
Aluminium is as reductor, extensive application in steel-making.Usually as a kind of steel liquid deoxidation, sweetening agent, but because magnesium has very high vapour pressure, vaporization combustion very easily is so be difficult to be directly used in deoxidation in steel making and desulfurization in steel-making for magnesium.
Use aluminium and magnesium in STEELMAKING PRODUCTION simultaneously, the two has the obvious synergistic effect, presents good deoxidation, sweetening effectiveness, can obtain better metallurgical effect.A lot of metallargists add iron and silicon and/or manganese and/or barium etc. with aluminium and magnesium and cast alloy, thereby directly use in steel-making.These contain magnesium alloy and are mainly used in deoxidation alloying, and are limited to the control action kou of inclusion, and cost is also high.
Chinese patent publication number CN 1316527A discloses a kind of Al-Mg-Fe alloy for deoxidation of molten steel and desulfurization, its composition (weight %) is: Al 20%～80%, Mg 2%～60%, be selected from Si 0～30%, Ba 0～10%, and Sr 0～5%, and Ca 0～5%, one or more alloying elements of Mn 0～30% and the Fe of surplus are for the Al-Mg-Fe alloy of deoxidation in steel making and desulfurization.This alloy has deoxidation, desulfurization and improves the effect of inclusion morphology.Its shortcoming is that desulfidation is limited, inclusion content height in the molten steel, and the cost of alloy height,
Chinese patent publication number CN101050481 discloses a kind of end-deoxidizer for steel-making, Al-Mn-Mg-Ca-Fe composite alloy with low-carbon (LC), low silicon, low-phosphorous, low-sulfur effect, the deoxidation of this kind reductor, sweetening effectiveness is good and stable, the fluidity molten steel of deoxidation is good, deoxidation products easily floats, and the inclusion total amount reduces, and molten steel is pure, steel is good, and changes inclusion morphology.Because it is steel making deoxidant, so sweetening effectiveness is limited.
Chinese patent publication number CN 1377977A discloses a kind of synthetic slag and slagging method thereof that reduces oxygen in the molten steel, sulphur content.The chemical composition of this synthetic slag is aluminium 2%～15%; Cerium 3%～15%; Magnesium 5%～8%; Barium 2%～10%; Calcium oxide 20%～50%; Aluminum oxide 10%～48%; Magnesium oxide 2%～10%; Water glass 2%～10%; Mierocrystalline cellulose 2%～8%.This synthetic slag has oxygen, sulphur content effect in certain reduction molten steel, but has added rare earth element, and the inclusion removal difficulty of generation is unfavorable to the molten steel cast, and the Mierocrystalline cellulose that contains may cause molten steel to increase hydrogen.
These alloys and slag agent differ from one another, but have problems such as the limited and difficult removal of inclusion of desulfidation, cost height when using.
Summary of the invention
The object of the present invention is to provide a kind of aluminium killed steel refinement and deoxidation desulfuration synthetic slag, both had the effect of good deoxidation, desulfurization, reduction molten steel inclusion content, have characteristics such as treatment effect is stable, convenience is easy-to-use, cost is low simultaneously again.
The present invention is a kind of aluminium killed steel refinement and deoxidation desulfuration synthetic slag, is mixed with mixture by the weight percent of following chemical ingredients, and chemical ingredients is: 35%～60%CaO+BaO, 5%～10%CaF
2, 10%～30%Al, 20%～30%Mg, the weight percent sum of above-mentioned substance and inevitable impurity is 100%, wherein: BaO accounts for 0～10% of slag total amount weight percent, said BaO can be BaO, also can be the BaCO of same BaO content
3, Mg/Al=1～1.5.
Al among the present invention plays desoxydatoin, promotes the carrying out of CaO desulphurization reaction simultaneously, and is conducive to inclusion and assembles, grow up, remove; Mg participates in desulphurization reaction directly; CaO is basic sweetening material, and itself has desulfidation, simultaneously as the promotor of Mg desulfurization, and as the particle of separating out of sulfide; CaF
2Has the effect of regulating slag melting point.
During desulfurizing and refining, synthetic slag of the present invention is made cored-wire feeding molten steel, also can make the slagging ball and directly be added to molten steel surface, can carry out desulfurization operations, using method is simple, and deoxidation of molten steel, desulfurization, reduction inclusion content of steel effect are remarkable, are suitable for the production of high-quality Clean Steel.
The present invention compared with prior art has following beneficial effect:
(1) deoxidation effect is good, once adds slag agent 1～2kg/t.s, can drop to S in the molten steel after the processing to be lower than 20 * 10
-6
(2) sweetening effectiveness is stable, and molten steel does not return sulphur;
(3) it is low to be mingled with content in the steel, and continuous casting does not block the mouth of a river;
(4) make heart yearn feeding molten steel, easy to use;
(5) be suitable for producing low-sulfur, clean aluminium killed steel, as the IF steel etc.
Embodiment
By proportioning of the present invention, with CaO, CaF
2Pulvis mixes back heat fritting, and cooling is broken into the fine powder that is lower than 0.5mm, mixes mutually with passivation Mg powder and the Al powder of corresponding proportion again, just obtains refined synthetic slag of the present invention.Cover the strip steel outward and make cored-wire, the feeding molten steel also can be made the slagging ball and directly be added to molten steel surface during use.The present invention is carrier with the IF steel, tests at vacuum induction furnace.It is as follows that the specific embodiment of the invention and test obtain effect:
Claims (2)
1. an aluminium killed steel refinement and deoxidation desulfuration synthetic slag is characterized in that being mixed with mixture by the weight percent of following chemical ingredients, and chemical ingredients is: 35% ~ 60% CaO+BaO, 5% ~ 10%CaF
2, 14% ~ 30%Al, 20% ~ 30%Mg, BaO accounts for 0 ~ 10% of slag total amount weight percent, Mg/Al=1～1.5, the weight percent sum of above-mentioned substance and inevitable impurity is 100%.
2. a kind of aluminium killed steel refinement and deoxidation desulfuration synthetic slag according to claim 1 is characterized in that BaO can be the BaCO of same BaO content
3
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| CN 200910013119 CN101993976B (en) | 2009-08-10 | 2009-08-10 | Aluminium killed steel refined deoxidizing and desulfurizing synthetic slag |
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| CN 200910013119 CN101993976B (en) | 2009-08-10 | 2009-08-10 | Aluminium killed steel refined deoxidizing and desulfurizing synthetic slag |
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| CN101993976A CN101993976A (en) | 2011-03-30 |
| CN101993976B true CN101993976B (en) | 2013-09-04 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109694938B (en) * | 2017-10-20 | 2020-09-01 | 鞍钢股份有限公司 | Deoxidizing alloying agent and preparation method thereof |
| CN113953452B (en) * | 2021-10-18 | 2022-12-23 | 马鞍山市方圆材料工程股份有限公司 | Smelting precision casting process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317584A (en) * | 2001-03-28 | 2001-10-17 | 何丽华 | Al-Mg alloy for deoxidizing and desulfurizing in smelting steel |
| CN1375562A (en) * | 2002-01-07 | 2002-10-23 | 张炼 | Composite metallurgical refining agent |
| CN1415765A (en) * | 2002-10-12 | 2003-05-07 | 吴光亮 | Desulfurizer and its producing technique |
| CN101476017A (en) * | 2009-01-20 | 2009-07-08 | 沈阳午飞炉料有限公司 | Aluminum-calcium deoxidation and desulphurization slag remover for metallurgy |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151287C (en) * | 2001-07-05 | 2004-05-26 | 北京科技大学 | Deeply desulfurizing slag for steel ladle as refining furnace |
| JP5343308B2 (en) * | 2006-09-11 | 2013-11-13 | Ｊｆｅスチール株式会社 | Desulfurization method for molten steel |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317584A (en) * | 2001-03-28 | 2001-10-17 | 何丽华 | Al-Mg alloy for deoxidizing and desulfurizing in smelting steel |
| CN1375562A (en) * | 2002-01-07 | 2002-10-23 | 张炼 | Composite metallurgical refining agent |
| CN1415765A (en) * | 2002-10-12 | 2003-05-07 | 吴光亮 | Desulfurizer and its producing technique |
| CN101476017A (en) * | 2009-01-20 | 2009-07-08 | 沈阳午飞炉料有限公司 | Aluminum-calcium deoxidation and desulphurization slag remover for metallurgy |
Non-Patent Citations (4)
| Title |
|---|
| Al-Mg合金在钢水中脱氧脱硫的行为分析及应用;杨俊;《矿冶》;20061231;第15卷(第4期);52-55 * |
| JP特开2008-63647A 2008.03.21 |
| 于赋志.钢水深脱氧用铝系复合材料的应用与发展.《东北大学学报（自然科学版）》.2000,第21卷(第4期),423-427. * |
| 杨俊.Al-Mg合金在钢水中脱氧脱硫的行为分析及应用.《矿冶》.2006,第15卷(第4期),52-55. |
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| CN101993976A (en) | 2011-03-30 |
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