铬矿熔融还原不锈钢直接合金化的热力学分析  

Thermodynamic Analysis of Smelting Reduction and Direct Alloying Using Chromium Ore in Stainless Steel Smelting Process

作　　者：刘岩[1] 姜茂发[1] 许力贤[1] 刘承军[1] 王德永[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《钢铁研究学报》2006年第11期15-18,共4页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(50374029)

摘　　要：针对铬矿熔融还原法不锈钢直接合金化工艺中的热力学问题,利用热力学参数状态图、化学反应等温方程式等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。结果表明:转炉内用铬矿熔融还原直接合金化是可行的,且必须外加还原剂;增加渣中(Cr2O3)含量,适当提高碱度,可以降低(Cr2O3)开始还原温度;渣中铬氧化物以(CrO)形态存在时,开始还原温度较低;(FeO)含量越低,(Cr2O3)开始还原温度越低。Aiming at the thermodynamic problems in the process of chromium ore smelting reduction and direct allo ying for stainless steel, the theoretical analysis and calculations have been carried out by thermodynamic diagram and isothermal equation. A theoretic basis for the thermodynamic feasibility of steel composition readjustment by chromium ore direct alloying in converter steelmaking process was afforded. The results show that smelting reduction and direct alloying by chromium ore in the converter are feasible, and externally applied reducing agent is indispensable; the starting reduction temperature of Cr203 in molten slag seems to increase with the increase of Cr203 and the slag basicity; when chromium oxide exists as CrO in the slag, the starting reduction temperature is lower than that of Cr2O3 ; the less the FeO content in molten slag, the lower the starting reduction temperature of Cr2O3.

关 键 词：转炉 铬矿 熔融还原 直接合金化 热力学分析 

分 类 号：TF764.1[冶金工程—钢铁冶金]