针对碱度、温度、熔渣氧化性及目标锰含量对锰直接合金化过程的影响,通过熔渣理化性能分析,应用分子-离子共存理论建立了四元熔渣活度模型及渣-钢间锰分配比模型,并应用该模型对锰直接合金化过程熔渣碱度、温度、氧化性及锰含量的影响进行了研究,为锰直接合金化冶炼工艺优化提供了理论依据。模型计算结果表明,直接合金化过程熔渣适宜的二元碱度为1.4～2.0;熔渣低氧化性有利于锰直接合金化反应进行,提高锰的收得率;从热力学方面分析,目标锰含量（0.5%～3%,质量分数,下同）越高,锰冶炼平衡收得率越高;炼钢温度为1 450～1 650℃时,温度变化对锰直接合金化影响较小。
For optimizing the process of Mn direct alloying,the activity model of CaO-SiO2-FeO-MnO quaternion system and distribution model of Mn were studied according to the coexistence theory of slag structure,the relationship of activities and distribution of Mn between slag and metal and basicity,temperature,oxidizability,mass of Mn was analyzed.The results show that the condign basicity of direct alloying is 1.4-2.0,low oxidizability and higher mass of Mn between 0.5%-3% are helpful to the alloying reaction and yield of Mn improving,while temperature between 1 450-1 650 ℃ influence lightly.
参考文献
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