转炉铬矿熔融还原法冶炼不锈钢母液过程的热力学  

Thermodynamics of the Process of Stainless Steelmaking by Chromium Ore Smelting Reduction in a Converter

作　　者：刘岩[1] 姜茂发[2] 许力贤[2] 王德永[2] 

机构地区：[1]沈阳大学辽宁省先进材料制备技术重点实验室,辽宁沈阳110044 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《钢铁研究学报》2011年第4期9-13,共5页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(50904017);东北大学轧制技术及连轧自动化国家重点实验室开放课题基金资助项目(2009003)

摘　　要：针对转炉铬矿熔融还原法冶炼不锈钢母液工艺,利用冶金热力学原理对该过程中涉及的几个重要问题进行了理论分析和计算,为在转炉中用铬矿实现钢的直接合金化的热力学可行性提供了理论依据。得到结论：①铬矿石在熔融还原转炉中是完全可以被还原的;②金属熔体中铬的活度随金属中铬质量分数的增加而增大,温度对金属铬活度的影响较小;③在1 500~1 600℃范围内,当金属中铬的质量分数小于20%时,在铬矿熔融还原法冶炼不锈钢母液条件下,含碳饱和的铁铬碳合金内不析出铬的碳化物。Aiming at the process of chromium ore smelting reduction for stainless steelmaking in a converter,the theoretical analysis and calculations were carried out for the several important questions of the process in the view of metallurgical thermodynamics.A theoretic basis for the thermodynamic feasibility of steel composition readjustment by chromium ore direct alloying in a converter steelmaking process was afforded.The following results are obtained： ① According to the thermodynamic analysis,the chromium ore can be reduced in a smelting reduction converter.② The activity of chromium in hot metal is raised by the incresement of the chromium content in hot metal.The effect of temperature on the activity of chromium is less.③ When the chromium content in hot metal is less than 20%,the precipitation of chromic carbide in Fe-Cr-C melts with carbon saturation is impossible on the conditions of producing stainless steel crude melts by smelting reduction at 1500-1600℃.

关 键 词：铬矿 转炉 熔融还原 活度 热力学 

分 类 号：TF764.1[冶金工程—钢铁冶金]