摘要
实验研究了V在FeO-SiO2-MnO(-TiO2)渣系与铁液间的分配行为,以及温度、渣成分、渣铁比、铁水初始[Si]、[Ti]含量的影响趋势.结果表明,在FeO-SiO2-MnO渣系中,铁水中V的入渣率、V在渣-金两相的分配比以及渣的钒容量均随温度升高而降低,而铁水中C的氧化损失随温度升高而增加;渣铁比较低的情况下,V的入渣率明显降低,但两种渣铁比的情况下,V的最大入渣率均落在MnO含量13%～25%,SiO2含量12%～24%的成分范围内.在FeO-SiO2-MnO-TiO2渣系中,随渣中TiO2含量增加,铁水中V的入渣率、V在渣-金两相的分配比以及渣的钒容量随之降低,V2O3在渣中的活度系数随TiO2含量升高而升高.实验条件下,各因素对铁水中V的入渣率的影响程度按以下顺序依次降低:终渣成分>温度>铁水初始[Si]、[Ti]等元素含量.
Distribution behavior of vanadium between hot metal and slag system of FeO-SiO2-MnO（-TiO2） was experimentally studied,together with the influential factors such as temperature,slag compositions,ratio of slag to hot metal,and initial [Si] or/and [Ti] content of hot metal. The results showed that in the ternary slag system of FeO-SiO2-MnO,the extraction rate of V from the hot metal,distribution ratio of V between slag and metal phases,and vanadium capacity of slag decreased with increasing of temperature,while the loss of C in hot metal caused by oxidizing reactions increased; the lower the ratio of slag to hot metal,the lower the extraction rate of V; while in the two cases of higher and lower ratio of slag to hot metal,the extraction rates of V reached their maximum values in the slag composition scope of MnO at 13%～25% and SiO2 at 12%～24%. In the quaternary slag system of FeO-SiO2-MnO-TiO2,with increasing of TiO2 content in slag,the extraction rate of V,distribution ratio of V between slag and metal,and vanadium capacity of slag decreased,while the activity coefficient of V2O3 in slag increased. Under laboratory conditions,the effects of influential factors on the extraction rate of V from hot metal decreased in the following order：final slag compositions temperature initial [Si] or/and [Ti] content.
出处
《过程工程学报》
CAS
CSCD
北大核心
2010年第6期1076-1083,共8页
The Chinese Journal of Process Engineering
