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将以前研究所得到的热力学模型进行扩展以便于在1300—1900℃温度范围内遍布整个 Fe-Mn-C 三元系锰和碳活度的数学计算。该模型可以预测特定锰浓度条件下碳和硅的限定浓度。例如,吹氧末期,在1750℃80%锰铁中1.3%C 和0.3%Si 浓度与饱和氧化锰渣相平衡。脱碳之后,渣中 MnO 含量约为65%。脱碳后锰的回收率明显地取决于渣量,一般回收率范围在80—90%之间。使渣相还原能显著地改善锰回收率。
The thermodynamic model obtained in the previous study was extended to facilitate the mathematical calculation of the activity and carbon activity of the entire Fe-Mn-C ternary system over the temperature range 1300-1900 ° C. The model predicts the defined concentration of carbon and silicon at specific manganese concentrations. For example, at the end of oxygen blowing, 1.3% C and 0.3% Si concentrations in 80% ferromanganese at 1750 ° C equilibrate with saturated manganese oxide slags. After decarburization, the MnO content in the slag is about 65%. Manganese recovery after decarbonization obviously depends on the amount of slag, the general recovery range between 80-90%. Reduction of the slag phase can significantly improve manganese recovery.