CN100594242C - Slag diluent for molten iron desulphurization slag - Google Patents
Slag diluent for molten iron desulphurization slag Download PDFInfo
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- CN100594242C CN100594242C CN200810048588A CN200810048588A CN100594242C CN 100594242 C CN100594242 C CN 100594242C CN 200810048588 A CN200810048588 A CN 200810048588A CN 200810048588 A CN200810048588 A CN 200810048588A CN 100594242 C CN100594242 C CN 100594242C
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Abstract
The invention discloses a residue diluting agent for the desulfuration residue of molten iron for improving the floating performance of the desulfuration residue of molten iron which consists of the materials with the following weight percentages: 45 to 55 percent of fluorite powder, 22 to 28 percent of spodumene mine powder, 15 to 20 percent of industrial sodium carbonate, 3 to 5 percent of boraxand 2 to 4 percent of oxide scale powder; wherein, the content of CaF2 in the fluorite powder is equal to or more than 85 percent and the granularity is equal to or less than 0.178mm; the spodumene mine powder is manufactured by carrying out fine grinding on natural mines and the granularity is equal to or less than 0.150mm; the contents of the weight percentages of the main chemical components of the spodumene mine powder are as follows: 0.8 to 1.5 percent of Li2O, 71 to 76 percent of SiO2 and 18 to 20 percent of Al2O3; the oxide scale powder is manufactured by carrying out ball milling on arolling oxide scale and the granularity is equal to or less than0.178mm. In the industrial sodium carbonate, the content of Na2CO3 is equal to or more than 98 percent. The content of Na2B4O7.10H2O inthe borax is equal to or more than 95 percent. The residue diluting agent of the invention takes the fluorite powder, the spodumene mine powder and the industrial sodium carbonate as the main materials, can effectively improve the floating performance of the desulfuration residue of molten iron, is applicable for the fluxing of the desulfuration residue with large residue amount, high basicity, large viscosity and high melting point; besides, the costs of the materials are low.
Description
Technical field
The present invention relates to a kind of shoddye agent that improves the desulfurizing slag of hot metal flowing property, be suitable for fluxing of the quantity of slag is big, basicity is high, viscosity is big, fusing point is high desulfurization slag, belong to desulfurizing iron pre-treating auxiliary material field.
Background technology
Mainly form for the pretreated desulfurization slag of desulfurizing iron by residue after blast furnace slag of bringing into and the sweetening agent desulfurization, because alkaline sorbent consumption amount is big and the bringing into of blast furnace slag, thereby, the desulfurization quantity of slag is big, basicity is high, viscosity is big, fusing point is high, cause desulfurization pretreatment slag skimming operational difficulty, the desulfurization slag residual quantity is big, causes that molten iron returns sulphur; Simultaneously, the slag iron of high viscosity desulfurization slag is obscured, and causes that the process molten iron of skimming runs off, and the macro-test result shows iron water amount that following the loss of skimming up to 50% of the quantity of slag, and iron loss is serious, has directly influenced output and iron and steel stock consumption indicators; In addition, because the high viscosity of desulfurization slag, cause desulfurization utensil, slag rake, desulphurised hot metal container dry slag serious, because the molten iron condensation is to the enhancement of bonding strength in the dry slag, cause the dry slag cleaning very difficult, and, cause relevant device to reduce work-ing life to the serious physical abuse of dry slag face generation.Therefore, how to improve that the performance of desulfurization slag has become an important research content that improves desulfurizing iron preconditioning technique economic target after the desulfurizing iron pre-treatment.For example: the clear 55-47310 of Japanese Patent " the easy flux of foundry ladle slag blanket ", a kind of desulfurization slag solidified modification agent that prevents is disclosed, its chemical ingredients is (weight): SiO
250～70%, Al
2O
320～36%, Na
2O+K
2O 10～15%, by reacting production low melting point slag with desulfurization slag, and employing thermite additional heat, further improve the flowability of slag, reach the purpose of the rate of the separation of slag iron, smooth deslagging and raising metal receipts, but there are the following problems: (1) under the big condition of the blast furnace slag amount of bringing into, the upgrading scarce capacity
It is acid that modification agent is, and influenced sweetening effectiveness; (3) adopt thermite to carry out heat supplement, cause modification agent cost height.Chinese patent ZL98100567.5 " a kind of desulfurizing slag modifier " discloses a kind ofly in order to improve the modification agent of desulfurizing slag of hot metal flowing property, and its chemical ingredients is (weight): SiO
235～50%, Na
2CO
335～50%, CaF
28～15%, surplus is Fe
2O
3, P
2O
5With other unavoidable impurities, and go under the high condition of amount, reached the upgrading effect that reduces the desulfurization slag fusing point, improves the desulfurization slag flowability at blast furnace slag ton sheet iron strip, but Na
2CO
3A large amount of uses of chemical feedstocks though played the effect that promotes desulfurization, have aggravated the erosion of molten iron container refractory materials working lining, simultaneously, based on the raw material structure of high-purity chemical raw material and natural matter, have improved the cost of modification agent.And, above-mentioned two kinds of modification agents mainly are the upgradings as the desulfurizing slag of hot metal of calcium-based desulfurizing agent, for desulfurizing iron with lime and magnesium powder composite desulfurizing agent, metal magnesium powder content is up to more than 20% (weight) in the sweetening agent, its desulfurization slag composition obviously is different from the desulfurization slag of calcium-based desulfurizing agent, cause above-mentioned modification agent upgrading scarce capacity, wherein the magnesium sulfide of MAGNESIUM METAL desulphurization reaction generation further forms magnesium oxide with the calcium oxide reaction, increased the viscosity of desulfurization slag, improved the fusing point of desulfurization slag, cause desulfurization pretreatment slag skimming operational difficulty in the actual production, the desulfurization slag residual quantity is big, causes that molten iron returns sulphur; Simultaneously, the slag iron of high viscosity desulfurization slag is obscured, and causes that the process iron loss of skimming is big.
Summary of the invention
Technical problem to be solved by this invention is the problem that lower cost ground effectively improves the desulfurizing slag of hot metal flowing property.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of slag diluent for molten iron desulphurization slag, it is made up of following raw materials by weight percent: fluorite powder 45～55%, triphane breeze 22～28%, calcined soda for industry 15～20%, borax 3～5%, iron scale powder 2～4%.
In such scheme:
CaF in the described fluorite powder
2Content 〉=85%, granularity≤0.178mm.
Described triphane breeze is to be made by the fine grinding of natural ore deposit, granularity≤0.150mm, and the weight percent content of its main chemical compositions is: Li
2O, 0.8～1.5%; SiO
2, 71～76%; Al
2O
3, 18～20%.
Described iron scale powder is that steel rolling iron scale ball milling is made granularity≤0.178mm.
Na in the described calcined soda for industry
2CO
3Content 〉=98%.
Na in the described borax
2B
4O
710H
2The content of O 〉=95%.
The present invention is a main raw material(s) with fluorite powder, triphane breeze, calcined soda for industry, and main chemical compositions is CaF
2, Na
2CO
3And SiO
2, by acidic cpd SiO
2Carry out the neutralization of the high basicity of desulfurization slag, form the low melting point composite oxides, reduce the desulfurization slag fusing point with alkaline matter; Pass through Na
2CO
3With the reaction of desulfurization slag, form the compound sodium compound of low melting point, simultaneously, pass through Na
2CO
3Participate in desulfurizing iron directly, play the effect that improves desulfuration efficiency.Comprehensive by multiple strong fusing assistant fluxing performance improved the growing amount of low melting point, the easy melt of low viscosity in the desulfurization slag, strengthened the shoddye effect to desulfurization slag, expanded the adaptive faculty of shoddye agent of the present invention to desulfurization slag.Simultaneously, a large amount of raw-material uses of natural mineral have reduced the material cost of shoddye agent.
Embodiment
Below in conjunction with specific embodiment the present invention is made detailed explanation.
Embodiment 1:
Slag diluent for molten iron desulphurization slag: form: fluorite powder 45%, granularity≤0.178mm, triphane breeze 28%, granularity≤0.150mm, calcined soda for industry 20%, borax 5%, iron scale powder 2%, granularity≤0.178mm by following raw materials by weight percent.Above-mentioned raw materials added in the agitator stir, promptly obtain required slag diluent for molten iron desulphurization slag, and pack packing by 5 kilograms every bag.Adopt the experiment of effect of having carried out in the laboratory fluxing of the slag diluent for molten iron desulphurization slag of preparation, in square porcelain boat, add 40 gram slag diluent for molten iron desulphurization slag, put into experimental electric furnace and be warming up to 1000 ℃, be incubated to take out after 10 minutes and topple over, the fused slag diluent for molten iron desulphurization slag flows out smoothly; Add 100 gram desulfurization slag earlier in crucible, add the slag diluent for molten iron desulphurization slag of half weight again on the desulfurization slag surface, put into experimental electric furnace and be warming up to 1100 ℃, be incubated to take out after 20 minutes and topple over, slag flows out smoothly.
Embodiment 2:
Slag diluent for molten iron desulphurization slag: form: fluorite powder 55%, granularity≤0.178mm, triphane breeze 22%, granularity≤0.150mm, calcined soda for industry 15%, borax 4%, iron scale powder 4%, granularity≤0.178mm by following raw materials by weight percent.Above-mentioned raw materials added in the agitator stir, promptly obtain required slag diluent for molten iron desulphurization slag, and pack packing by 5 kilograms every bag.The slag diluent for molten iron desulphurization slag that adopts preparation has carried out type approval test under 320 tons of torpedo jar magnesium base mixed injections of certain steel mill and two kinds of desulfurization working conditions of calcium base mixed injection desulfurization, before desulfurization, add slag diluent for molten iron desulphurization slag for 0.8～1 kilogram according to ton iron, result of industrial test shows that single jar of average deslagging amount improves 70% and 72% respectively.
Embodiment 3:
Slag diluent for molten iron desulphurization slag: form: fluorite powder 51%, granularity≤0.178mm, triphane breeze 25%, granularity≤0.150mm, calcined soda for industry 19%, borax 3%, iron scale powder 2%, granularity≤0.178mm by following raw materials by weight percent.Above-mentioned raw materials added in the agitator stir, promptly obtain required slag diluent for molten iron desulphurization slag, and pack packing by 5 kilograms every bag.50 tons of iron ladle particle magnesium stripping sulphur of certain steel mill are skimmed in the process, because the blast furnace slag titaniferous, the amount of bringing into is big, basicity is high, fusing point is high, cause the broken difficulty of loosing, skim of molten iron surface devulcanization slag, the special slag diluent for molten iron desulphurization slag of preparation that adopts has carried out type approval test, before desulfurization, adding slag diluent for molten iron desulphurization slag for 0.5 kilogram according to ton iron, result of industrial test shows that desulfurization slag is reunited, and shortens single jar of slag-removing time 50%.
The main chemical compositions of this slag diluent for molten iron desulphurization slag is CaF
2, Na
2CO
3And SiO
2, by acidic cpd SiO
2Carry out the neutralization of the high basicity of desulfurization slag, form the low melting point composite oxides, reduce the desulfurization slag fusing point with alkaline matter; Pass through Na
2CO
3With the reaction of desulfurization slag, form the compound sodium compound of low melting point, simultaneously, pass through Na
2CO
3Participate in desulfurizing iron directly, play the effect that improves desulfuration efficiency, but consider Na
2CO
3Volatilization under the hot conditions and corrosive nature thereof, the weight percent add-on of special restriction calcined soda for industry is no more than 20%.CaF
2As a kind of slag fusing assistant, its mechanism of fluxing can be explained by the random network theory, in melt, the F-ion enters in the network that is formed by the Si-O tetrahedron, make original bridging oxygen become non-bridging oxygen, thereby interrupted the connection between the Si-O tetrahedron, form suspension.F particularly
-It is saturated to enter the suspension place electricity price that forms in the network, can not got up by sports association in the middle of the network again, and it has reduced smelt surface tension, has increased the wettability of melt, so, CaF
2It is strong fusing assistant commonly used in the metallurgical industry.Because fluorite is cheap, refractory corrosion is weaker than calcined soda for industry, thereby the weight percent amount of allocating into that the present invention has chosen the fluorite powder is 45～55%.Li
2The same K of O
2O, Na
2O equally is the alkalimetal oxide of using always.The Lithium Oxide 98min molecular weight is 29.9, is basic metal intermediate ion radius minimum, with K
2O, Na
2O compares, Li
2O has stronger fluxing action, can significantly reduce the viscosity of melt, accelerate burn-off rate, thereby the introducing of triphane has further improved the upgrading effect of shoddye agent to desulfurization slag.Borax is colourless translucent crystal or white crystalline powder, dehydration weathering easily in air, be heated to about 380 ℃, lose whole crystal water and become anhydrous salt, be melt into vitreous state at 880 ℃, as a kind of strong fusing assistant at metallurgy, glass, industry such as pottery are used widely, in addition, the oxide compound of iron and the reaction of multiple oxide compound can be produced multiple fusible compound and easy melt, thereby, introduce steel rolling iron scale powder and borax in the present invention on a small quantity and can improve shoddye effect desulfurization slag, reduce the fusing point of shoddye agent of the present invention self simultaneously, reaction contact area between expansion shoddye agent and the desulfurization slag, the effect of fluxing of raising desulfurization slag.For Mg-base desulfurizing agent, because the magnesium sulfide stability that generates after the MAGNESIUM METAL desulfurization is lower than sulfurated lime, thereby, under the condition that has calcium oxide to exist, will further generate sulfurated lime and magnesium oxide with the calcium oxide reaction, because magnesian introducing, improved the fusing point and the viscosity of desulfurization slag, thereby, under the big condition of the blast furnace slag amount of bringing into, especially titanium-containing blast furnace slag will aggravate the difficulty of desulphurization and slag skimming and the phenomenon that slag iron is obscured.The present invention is comprehensive by multiple strong fusing assistant fluxing performance, improved the growing amount of low melting point, the easy melt of low viscosity in the desulfurization slag, strengthened shoddye effect to desulfurization slag, expanded the adaptive faculty of shoddye agent of the present invention to desulfurization slag, by the desulfurization slag shoddye type approval test under blast furnace slag heterogeneity and the amount of bringing into and the different sorts sweetening agent working condition, obtained and reduced iron loss and the effect that makes things convenient for desulphurization and slag skimming.Simultaneously, a large amount of raw-material uses of natural mineral have reduced the material cost of shoddye agent.
Slag diluent for molten iron desulphurization slag of the present invention has following advantage:
1, slag diluent for molten iron desulphurization slag preparation of the present invention is simple, and the starting material source is wide, and cost is low, adaptability is strong.
2, the present invention combines the advantage of multiple strong fusing assistant, introduces Li by the employing of triphane natural mineral raw
2The O composition on the basis that does not increase material cost, has strengthened the effect of fluxing of slag diluent for molten iron desulphurization slag, has the good characteristics of fluxing performance, can satisfy the modification needs of fluxing of calcium base and Mg-base desulfurizing agent desulfurizing slag of hot metal.
3, to select natural mineral be main raw material(s) in the present invention, have material cost low, purchase advantage easily.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural changes of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (4)
1, a kind of slag diluent for molten iron desulphurization slag is made up of following raw materials by weight percent: fluorite powder 45～55%, triphane breeze 22～28%, calcined soda for industry 15～20%, borax 3～5%, iron scale powder 2～4%; CaF in the described fluorite powder
2Content 〉=85%; The weight percent content of the main chemical compositions of described triphane breeze is: Li
2O, 0.8～1.5%; SiO
2, 71～76%; Al
2O
3, 18～20%; Na in the described calcined soda for industry
2CO
3Content 〉=98%; Na in the described borax
2B
4O
710H
2The content of O 〉=95%.
2, slag diluent for molten iron desulphurization slag as claimed in claim 1 is characterized in that the granularity≤0.178mm of described fluorite powder.
3, slag diluent for molten iron desulphurization slag as claimed in claim 1 is characterized in that described triphane breeze is to be made granularity≤0.150mm by the fine grinding of natural ore deposit.
4, slag diluent for molten iron desulphurization slag as claimed in claim 1 is characterized in that described iron scale powder is that steel rolling iron scale ball milling is made granularity≤0.178mm.
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| CN200810048588A CN100594242C (en) | 2008-07-28 | 2008-07-28 | Slag diluent for molten iron desulphurization slag |
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| CN200810048588A CN100594242C (en) | 2008-07-28 | 2008-07-28 | Slag diluent for molten iron desulphurization slag |
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| CN100594242C true CN100594242C (en) | 2010-03-17 |
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Families Citing this family (9)
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|---|---|---|---|---|
| CN102747194B (en) * | 2012-07-18 | 2014-10-15 | 河南通宇冶材集团有限公司 | Fluoride-free environmental-friendly slag dilution solvent for electric furnace, converter and medium frequency furnace and preparation method of fluoride-free environmental-friendly slag dilution solvent |
| CN103572000A (en) * | 2012-07-19 | 2014-02-12 | 宝钢不锈钢有限公司 | Low fluorine melting point lowering agent for chromium-containing hot metal smelting, and use methods thereof |
| CN102787203B (en) * | 2012-08-08 | 2015-06-10 | 江苏大学 | Fluoride-free slag-making fluxing agent for converter steel making |
| CN102787214B (en) * | 2012-08-08 | 2015-06-10 | 江苏大学 | Ladle furnace refining fluoride-free pre-melted slags, preparation method and using method |
| CN102787207B (en) * | 2012-08-08 | 2015-04-22 | 江苏大学 | Fluoride-free slagging flux for electric-arc furnace steelmaking |
| CN104593538B (en) * | 2015-01-21 | 2016-09-28 | 首钢总公司 | A kind of slag sluicing system method of high-titanium molten iron |
| CN104673968B (en) * | 2015-03-03 | 2016-06-15 | 海城市金福锋科技有限公司 | A kind of molten steel shoddye agent and production method thereof |
| CN110218840A (en) * | 2019-06-24 | 2019-09-10 | 鞍钢股份有限公司 | A kind of high-titanium molten iron dreg modifying agent and slag iron separation method |
| CN113913585B (en) * | 2020-07-10 | 2023-01-20 | 上海梅山钢铁股份有限公司 | Method for reducing proportion of large-size desulfurized slag in molten iron desulfurized slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039326A (en) * | 1975-04-17 | 1977-08-02 | Acciaierie Di Piombino S.P.A. | Antiscorific powder for the casting of steels into ingot molds |
| CN1199099A (en) * | 1998-02-24 | 1998-11-18 | 宝山钢铁(集团)公司 | Desulfurizing slag modifier |
| CN1465538A (en) * | 2002-06-08 | 2004-01-07 | 叶德敏 | Steel slag modification and steel slag cement |
| CN101113486A (en) * | 2007-07-10 | 2008-01-30 | 重庆大学 | Melted iron desulfuration pretreatment furnace slag modifier and method for making same |
-
2008
- 2008-07-28 CN CN200810048588A patent/CN100594242C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039326A (en) * | 1975-04-17 | 1977-08-02 | Acciaierie Di Piombino S.P.A. | Antiscorific powder for the casting of steels into ingot molds |
| CN1199099A (en) * | 1998-02-24 | 1998-11-18 | 宝山钢铁(集团)公司 | Desulfurizing slag modifier |
| CN1465538A (en) * | 2002-06-08 | 2004-01-07 | 叶德敏 | Steel slag modification and steel slag cement |
| CN101113486A (en) * | 2007-07-10 | 2008-01-30 | 重庆大学 | Melted iron desulfuration pretreatment furnace slag modifier and method for making same |
Non-Patent Citations (8)
| Title |
|---|
| CaO-Mg铁水脱硫渣改性剂的实验研究. 王时松等.北京科技大学学报，第29卷 增刊1卷. 2007 |
| CaO-Mg铁水脱硫渣改性剂的实验研究. 王时松等.北京科技大学学报，第29卷 增刊1卷. 2007 * |
| Li2O、Na2O、K2O、BaO对CaO基钢包渣系性能影响的实验研究. 杨吉春等.炼钢，第18卷第2期. 2002 |
| Li2O、Na2O、K2O、BaO对CaO基钢包渣系性能影响的实验研究. 杨吉春等.炼钢，第18卷第2期. 2002 * |
| 改质剂对LATS精炼钢包渣粘度的影响. 王宏明等.过程工程学报，第6卷第2期. 2006 |
| 改质剂对LATS精炼钢包渣粘度的影响. 王宏明等.过程工程学报，第6卷第2期. 2006 * |
| 铁水预处理喷枪用耐火浇注料的研制与应用. 欧阳德刚等.耐火材料. 2008 |
| 铁水预处理喷枪用耐火浇注料的研制与应用. 欧阳德刚等.耐火材料. 2008 * |
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