Feasibility Analysis of Simultaneous Dephosphorization and Vanadium Extraction by Converter
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摘要: 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2O5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2O5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。Abstract: The thermodynamic calculations of element-oxidation in the process of vanadium extraction in converter had been done.The calculated results indicatethat the slag containing calcium can keep P2O5 in the slag.The molecular-ion model was established for high calcium vanadium slag system,and the calculations for setted slag shows that effect of the slag on phosphorus-fixation is greatest when P2O5 content in the slag is 2% and basicity is 1.9; under the condition of logPO2=(-5),phosphorus is fixed by CaO in the form of 3 CaO.P2O5,and the effect was the best.It is proved theoretically that it is feasible for simultaneous dephosphorization and extraction of vanadium in vanadium extraction converter.
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Key words:
- converter /
- dephosphorization /
- vanadium extraction /
- molecular-ion model /
- slag
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