Mn-Fe熔体的脱Si过程及Mn-Fe熔体氧位研究  

DESILICONIZATION FOR FERROMANGANESE MELT AND ITS OXYGEN POTENTIAL IN DESILICONIZATION PROCESS

作　　者：陈二保[1] 董元篪[1] 郭上型[1] 

机构地区：[1]安徽工业大学冶金工程系,马鞍山243002

出　　处：《金属学报》2001年第4期400-404,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金资助项目59774015

摘　　要：通过实验（１３５０℃ ）测定 Ｍｎ－ＭｎＯ２平衡体系 Ｍｎ液氧位，验证了 ＺｒＯ２（ＭｇＯ）固体电解质定氧探头可用于测定 Ｍｎ－Ｆｅ熔体和锰液氧位．电动势－氧位换算关系式为 ｌｎ ｐｏ２－３１．５６－（６９５４８．８＋４６４２７．７×Ｅ）／Ｔ．使用 ＢａＣＯ３７０％－ＭｎＯ２５％－（Ｆｅ２Ｏ３＋ＢａＦ２）２５％（质量分数）的熔剂对高炉 Ｍｎ－Ｆｅ脱 Ｓｉ时，与最高脱 Ｓｉ率（７５％）对应的 Ｆｅ２Ｏ３含量是１２％； Ｍｎ－Ｆｅ熔体中氧位和 Ｃ的活度关系式为 ｐｏ２× １０１２＝３５．８１２－０．１０６×ａｃ； Ｍｎ－Ｆｅ熔体中氧位和 Ｍｎ损（　［Ｍｎ］）关系为ｐｏ２×１０１２＝６．２３８＋０．６７９×　［Ｍｎ］．使用 ＢａＣＯ３６０％－ＢａＦ２１０％－ＭｎＯ２１５％－Ｆｅ２Ｏ３１５％熔剂对高炉 Ｍｎ－Ｆｅ脱Ｓｉ时， 最高脱 Ｓｉ率（８８．９％）和最高氧位（８．３１×１０－１２ Ｐａ）对应的脱 Ｓｉ时间为 １５ ｍｉｎ．脱 Ｓｉ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 ６．２３８×１０－１２ Ｐａ．Experimental measurements of oxygen potential in liquid Mn of Mn-MnO2 equlibrium. system (1350 degreesC) show that ZrO2 (MgO) solid eletrolyte oxygen probe can be used to measure the oxygen potential in liquid Mn and ferromanganese melts. The relation between oxygen potential and electromotive force is In p(O2) = 31.56-(69548.8+46427.7xE)/T. When BaCO(3)70%-MnO(2)5%(Fe2O3+BaF2)25% fluxes are used to desiliconize for blast furnace ferromanganese, the maximum desiliconization rate(75%) corresponds to Fe(2)O(3)12% in flux the relations between the oxygen potential in ferromanganese melt and carbon activity as well as manganese loss (Delta [Mn]) in the melt are p(O2)x10(12)=35.812-0.106xa(C) and pO(2)x10(12)=6.238+0.679x Delta [Mn] respectively. When blast furnace ferromanganese is desiliconized by BaCO(3)60%-BaF(2)10%-MnO(2)15%-Fe(2)O(3)15% fluxes, the maximum desiliconization rate (88.9%) and the highest oxygen potential in ferromanganese melt correspond to 15 min treatment. 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 at or under 6.238X10(-12) Pa.

关 键 词：MN-FE熔体 氧化 脱硅 纯净钢 炼钢 

分 类 号：TF762.8[冶金工程—钢铁冶金]