控制脱Si脱P过程Mn-Fe熔体氧位的反应  

Reactions controlled the oxygen potential of Mn-Fe melts in desiliconization and dephosphorization processes

作　　者：陈二保[1] 董元篪[1] 郭上型[1] 王海川[1] 

机构地区：[1]安徽工业大学冶金与材料学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2002年第1期1-5,9,共6页Journal of Anhui University of Technology（Natural Science）

基　　金：国家自然科学基金资助项目(59774015)

摘　　要：使用BaCO370%-MnO25%-(Fe2O3+BaF2)25%(质量分数)的熔剂对高炉Mn-Fe脱Si时,Mn-Fe熔体中氧位与C的活度和Mn损(Δ犤Mn犦)关系式分别是pO2×1012/Pa=35.812-0.106×aC和pO2×1012/Pa=6.238+0.679×Δ犤Mn犦。脱硅实验结果表明,脱Si过程中Mn-Fe熔体的氧位是由熔体中碳氧反应控制的;脱Si保Mn的最高氧位是6.238×10-12Pa。使用相同的熔剂对高炉Mn-Fe脱P时,Mn-Fe熔体中氧位与C的活度,Si的活度和Mn损的关系式分别为pO2×1012/Pa=-1.542+0.018×aC,pO2×1012/Pa=-1.284+1.366×aSi和pO2×1012/Pa=1.737+0.565×Δ犤Mn犦。脱P实验结果表明,脱P过程中Mn-Fe熔体的氧位是由熔体中硅氧反应控制的;脱P保Mn的最高氧位为1.737×10-12Pa。When BaCO370%-MnO25%-(Fe2O3+BaF2)25%(mass fraction) fluxes are used to desiliconize for blast furnace ferromanganese, the relations between the oxygen potential in ferromanganese melt and carbon activity as well as manganese loss (Δ) in melt are ×1012/Pa=35.812-0.106×aC and ×1012/Pa=6.238+0.679×(Δ) respectively. The results of desiliconization experiments show that the oxygen potential in ferromanganese melt is controlled by carbon-oxygen reaction in the melt. In order to desiliconize for ferromanganese and to prevent manganese from oxidation the oxygen potential in ferromanganese melt has to be controlled <IMG SRC='IMAGE/01290007.JPG' HEIGHT=11 WIDTH=11><IMG SRC='IMAGE/01290008.JPG' HEIGHT=11 WIDTH=11>at or under 6.238×10-12 Pa .When the same fluxes as desiliconization are used to dephosphorize for blast furnace ferromanganese, the relations between the oxygen potential in ferromanganese melt and carbon activity,silicon activity as well as manganese loss (Δ)in melt are ×1012/Pa=-1.542+0.018×aC,×1012/Pa=-1.284+1.366×aSi and po2×1012/Pa=1.737+0.565×(Δ) respectively. The results of dephosphorization experiments show that the oxygen potential in ferromanganese melt is controlled by silicon-oxygen reaction in the melt. In order to dephosphorize for ferromanganese and to prevent manganese from oxidation the oxygen potential in ferromanganese melt has to be controlled at or under 1.737×10-12 Pa .

关 键 词：MN-FE熔体 氧位 脱硅 脱磷 纯净钢 炼钢 

分 类 号：TF762.8[冶金工程—钢铁冶金] TF703