烧结混匀料液相生成行为对烧结矿质量的影响  

Effect of liquid phase generation behavior of sintering mixture on sinter quality

作　　者：康健 宁晓钧[1] 张建良[1] 王耀祖[1] 王桂林 刘征建[1] KANG Jian;NING Xiao-jun;ZHANG Jian-liang;WANG Yao-zu;WANG Gui-lin;LIU Zheng-jian(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁研究学报》2020年第10期860-867,共8页Journal of Iron and Steel Research

基　　金：中央高校基本科研业务费专项资金资助项目(FRF-NP-19-004)。

摘　　要：为探究烧结混匀料液相生成行为对烧结矿质量的影响,针对不同矿粉配比条件下混匀料的基础特性进行烧结杯实验。通过SEM-EDS、荷重软化熔滴实验等性能测定实验,研究了混匀料液相生成行为对烧结矿矿相结构、技术经济指标与冶金性能的影响。实验结果表明,矿粉配比对混匀料液相生成行为有影响,进而影响烧结矿质量。混匀料液相流动性指数越高,烧结矿越容易形成大孔薄壁结构,导致强度越差。烧结矿转鼓指数随混匀料同化温度的升高呈先降低后升高的趋势,与混匀料液相流动性指数呈负相关关系,混匀料液相流动性指数从4.67升高到5.53,烧结矿转鼓指数从73.33%降低至68.00%。混匀料的液相流动性指数越高,烧结矿低温还原粉化性能越差。当混匀料同化温度为1 296℃,液相流动性指数为4.69时,烧结矿还原度最高达到83.67%,此时烧结矿的软化区间最窄。In order to investigate the effect of liquid phase generation behavior of sinter blending ore on sinter quality, the basic characteristics of the blended ore at different ratios of ore were analyzed experimentally. The effects of the liquid-phase generation behavior of the blending material on phase structure, technical and economic indicators and metallurgical properties of the sinter were investigated by SEM-EDS, softening-melting drop test and other performance measurement tests. The results indicate that the ratio of iron ore has an influence on the liquid phase generation behavior of the blending ore, which in turn affects the sinter quality. The higher the liquid phase fluidity index of the mixture, the easier the sinter is to form a thin-walled structure with large pores, resulting in poor strength. The sinter drum index tends to decrease and then increase with the increase of the assimilation temperature of the blending ore, which is negatively correlated with the liquid phase fluidity index of the blending ore. The liquid phase fluidity index of blending ore increases from 4.67 to 5.53, then sinter drum index decreased from 73.33% to 68.00%. The higher the liquid phase fluidity index of blended ore, the worse the RDI of sinter. In this experiment, when the assimilation temperature of the blending ore is 1 296 ℃ and the liquid phase fluidity index is 4.69, the reducibility of sinter is up to 83.67% and the softening interval of the sinter is the narrowest.

关 键 词：液相生成行为 混匀料 矿相结构 冶金性能 

分 类 号：TF046.4[冶金工程—冶金物理化学]