烧结矿中MgO对钒钛矿综合炉料软熔滴落的影响

摘要 以钒钛磁铁矿炼铁原料为基础，系统研究了烧结矿中MgO质量分数对高炉冶炼钒钛磁铁矿综合炉料软熔滴落性能和V，Cr在渣铁中迁移规律的影响，并进行了理论分析.研究表明，随着烧结矿中MgO质量分数的提高，综合炉料的软化区间t○40-t○4变宽；熔化区间t○D-t○S稍有收窄，软熔带变薄且位置略微下移；熔滴性能总特征值S先减小后增大，综合炉料透气性先变好后恶化，在MgO质量分数为2.98%~3.40%时透气性最好；滴落率逐渐变小；V， Cr在滴落铁中的收得率略有降低；因此，烧结矿中MgO质量分数在3.40%左右为宜，此时高炉渣中MgO质量分数约为12%.
Abstract：Effects of MgO content in sinter on softening-dripping behavior of vanadium-titanium magnetite composite burden and the migration patterns of V， Cr in slag-iron were studied. The results showed that with the increasing of MgO in sinter， the softening range t40-t4 tends to be wider，the melting range tD-tS is narrowed slightly. The cohesive zone tends to be narrow and its location is shifted down but not obvious. Softening-dripping characteristics S decreases at first then increases， the permeability tends to be better then worse， when the content of MgO is between 2.98% and 3.40%， the permeability is the best. The dripping ratio tends to be declining; when MgO is increased， it is not conducive to the reduction of V， Cr. The optimal content of MgO in the sinter is around 3.40% and the content of MgO in BF slag is about 12%.