矿焦混装对钒钛矿综合炉料软熔滴落的影响  

Effects of ore-coke mixed charging on softening-dripping behavior of vanadium-titanium magnetite composite burdens

作　　者：陈立杰[1] 柳政根[1] 付小佼[1] 于洪翔[1] 唐珏[1] 储满生[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《钢铁》2015年第1期5-10,共6页Iron and Steel

基　　金：国家高技术研究发展(863)计划资助项目(2012AA062302;2012AA062304);中央高校基本科研业务费资助项目(N110202001)

摘　　要：为提高高炉冶炼钒钛磁铁矿水平,系统研究了矿焦混装对高炉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。试验过程中烧结矿和球团矿所占比例不变。研究表明,矿焦混装对高炉综合炉料的软化区间、熔化区间、滴落率和透气性等软熔滴落性能参数有显著影响。随着混装率提高,软化区间t40-t4稍微变宽;熔化区间tD-tS逐渐变窄,软熔带变薄且位置下移;熔滴性能总特征值明显减小,综合炉料透气性能显著改善;渣铁滴落率先增加后减少;V、Cr在初铁中的收得率先升高后降低。因此,一定程度的矿焦混装有利于改善钒钛磁铁矿高炉冶炼综合炉料的软熔滴落性能,其混装率以25%为宜。Effects of ore-coke mixed charging on softening-dripping behavior of vanadium-titanium magnetite composite burdens and migration patterns of V and Cr elements in slag-iron were studied systemically and theoretically to improve the level of smelting vanadium-titanium magnetite in blast furnace. The proportion of sinter and pellet was constant. The results show that, ore-coke mixed charging ratio has significant effects on the softening and dripping parameters including softening zone, melting zone dripping ratio and permeability. With the increase of ore-coke mixed charging ratio, the soft- ening range to--t, tends to be a little wider; the melting range td--ts is greatly narrowed; the cohesive zone tends to nar- row and its location is shaft down; softening-dripping characteristics tends to decrease significantly, gas permeability be- comes better and the dripping ratio tends to increasing then decreasing; the recovery ratio of V and Cr in initial iron tends to increasing then decreasing, Thus, a certain ratio of ore-coke mixed charging is helpful to improve the softening-dripping behavior of vanadium-titanium magnetite composite burdens for smelting in blast furnace. The optimal ore-coke mixed charging ratio is 25%.

关 键 词：钒钛磁铁矿 高炉炼铁 矿焦混装 软熔滴落性能 V Cr还原 

分 类 号：TF53[冶金工程—钢铁冶金]