转炉渣脱磷能力及铁水脱磷的实验研究

Experimental Study of the Converter SlagDephosphorizing and Hot Metal Dehposphorization

摘要: 基于循环经济和环保对冶金渣循环利用的要求，本文开展转炉钢渣返回铁水脱磷的研究。利用SEM分析了转炉渣的主要物相，研究了在转炉渣中配入不同量的CaO、Fe₂O₃对脱磷率的影响。研究结果表明，转炉渣的主要物相为Ca₂SiO₄、RO相和铁酸钙，Ca₂SiO₄和3Ca•P₂O₅富集成5CaO•SiO₂•P₂O₅。转炉渣中不配入CaO、Fe₂O₃时，脱磷率为29.41%，随着CaO、Fe₂O₃含量的增加，脱磷率上升，转炉渣含量为28%时，脱磷率达到了98.21%。

Abstract: Based on requirements of circular economy and environmental protection for metallurgical slag reutilization, the research of hot metal dephosphorization with steel slag from converter is carried out in this paper. The effect of converter slag with different addition of CaO, Fe₂O₃ for the de-phosphorizing rate is studied though analyzing the main phases of converter slag with SEM. The result indicates the main phases of converter slag are Ca₂SiO₄, RO phase, calcium ferrite and their combinations. The dephosphorizing rate is 29.41% while the converter slag mixes no CaO or Fe₂O₃, and the dephosphorizing rate rises as the increase of CaO and Fe₂O₃, then the dephosphorizing rate reaches 98.21% when the content of converter slag is 28%.