烧结矿中MgO对钒钛矿综合炉料软熔滴落的影响  

Effects of MgO Content in Sinter on Softening- Dripping Behavior of Vanadium- Titanium Magnetite Composite Burdens

作　　者：柳政根[1] 储满生[1] 陈立杰[1] 付小佼[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2015年第5期655-659,共5页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2012AA062302;2012AA062304);中央高校基本科研业务费专项资金资助项目(N110202001)

摘　　要：以钒钛磁铁矿炼铁原料为基础,系统研究了烧结矿中Mg O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Mg O质量分数的提高,综合炉料的软化区间t40-t4变宽;熔化区间tD-tS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Mg O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Mg O质量分数在3.40%左右为宜,此时高炉渣中Mg O质量分数约为12%.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 to - 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%.

关 键 词：高炉冶炼 钒钛磁铁矿 MGO 软熔滴落性能 V Cr还原 

分 类 号：TF531[冶金工程—钢铁冶金]