ABSTRACT Aiming at the high-efficiency utilization of vanadium–titanium magnetite with high chromium content, a slag formation path in the converter smelting process of semi-steel containing chromium was proposed. The influences of MnO and Cr2O3 on the melting characteristics of converter slag were calculated through FactSage. The effects of components and temperature on the equilibrium distribution ratio of P, Cr between molten CaO–SiO2–FeO–MgO–MnO–Cr2O3–P2O5 slags and molten steel was obtained by the indirect experimental method and the regular solution model. The results show that the liquidus region and the proportion of liquid phase decrease with the increase of Cr2O3 content in steel slag. The increases of basicity conduces to dechromization and dephosphorization. The L Cr increased continuously with increasing FeO content and the influence of the oxidization of steel slag on the L Cr is greater than L P. Both L P and L Cr decrease distinctly with the increase in temperature. The slag formation path for the smelting process of semi-steel containing chromium is as follows: 17wt-%CaO–16wt-%SiO2–67wt-%FeO→25wt-%CaO–20wt-%SiO2–55wt-%FeO→57wt-%CaO–17wt-%SiO2– 6wt-%FeO.

中文翻译：

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转炉冶炼含铬半钢过程中的造渣路径

摘要 针对高铬钒钛磁铁矿的高效利用，提出了转炉冶炼含铬半钢过程中的造渣路径。通过FactSage计算了MnO和Cr2O3对转炉渣熔化特性的影响。组分和温度对CaO-SiO2-FeO-MgO-MnO-Cr2O3-P2O5渣与钢水之间P、Cr平衡分布比的影响是通过间接实验方法和规则溶液模型获得的。结果表明，随着钢渣中Cr2O3含量的增加，液相线区和液相比例减小。碱度的增加有利于脱铬和脱磷。L Cr 随FeO 含量的增加而不断增加，钢渣氧化对L Cr 的影响大于L P。LP 和L Cr 均随温度升高而明显降低。含铬半钢冶炼过程的造渣路径为：17wt-%CaO–16wt-%SiO2–67wt-%FeO→25wt-%CaO–20wt-%SiO2–55wt-%FeO→57wt- %CaO–17wt-%SiO2–6wt-%FeO。