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通过对转炉提钒过程元素氧化的热力学计算,证明含钙的炉渣可以使P2O5固定在炉渣中,从而实现氧化脱磷。建立了五元高钙钒渣体系的分子离子模型,对设定的渣系成分进行计算分析表明,在渣中P2O5含量在2%,碱度控制在1.9时,炉渣的固磷效果最佳;在设定炉渣成分条件下,logPO2=(-5)时磷被钙以3CaO·P2O5的形式固定的效果最好。从理论上证明了在提钒转炉内进行同时脱磷提钒是可行的。
Through the thermodynamic calculation of elemental oxidation of vanadium in the converter, it was proved that the calcium-containing slag can fix P2O5 in the slag so as to realize the oxidative dephosphorization. The molecular ion model of five-element high-calcium-vanadium slag system was established. The calculated slag components were calculated and analyzed. The results showed that the best phosphorus-fixing effect was obtained when the content of P2O5 was 2% and the alkalinity was controlled at 1.9. Under the condition of setting the slag composition, the effect of fixing phosphorus in the form of 3CaO · P2O5 by logPO2 = (- 5) is the best. It is theoretically proved that simultaneous vanadium reduction in vanadium converter is feasible.