合理使用低品位矿粉的烧结试验研究  

Research on sintering test for using low grade iron ores with rational proportion

作　　者：肖志新[1,2] 薛正良[1] 胡正刚[2] 余珊珊[2] 

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081 [2]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《钢铁研究》2014年第4期1-5,9,共6页Research on Iron and Steel

摘　　要：对铁品位在57%以下、理化和烧结性能较差的低品位矿粉按粗、细粒级搭配后,在混合矿中以29%的配比进行烧结杯试验。结果表明:细粒级矿配比为20%～26%,且增加粗粒B粉并减少C粉,有利于改善烧矿性能指标。基于使用该低品位矿的研究结果,设计了低品位矿配比分别为35%和41%的配用方案,其烧结指标合理、稳定;低品位矿配比为35%的方案烧结矿指标优于其他方案,与配比为29%的方案相比,转鼓指数平均提高2.49%,煤耗降低2.22kg/t,烧结矿矿相结构中针状铁酸钙明显增加,孔洞尺寸变小且分布分散,低温还原粉化率平均降低7.24%,软熔区间减少18℃。Sintering pot experiments using low grade （w（TFe）〈57 %）, poor physicochemical and metallurgical properties ores with a proportion of 29 % and composed of fine and coarse sizes are carried out. Results showed that the properties of sinter were improved when the ratio of fine size ore in mixture was 20 %-26%, with increasing the mass of coarse size ore B and decreasing the mass of ore C. Based on the result of using low grade iron ores with the proportion of 29 %,the plans for using low grade iron ores with the proportion of 35 % and 41% were carried out,and the sintering indexes were more reasonable and stable; the average sintering indexes of using low grade iron ores with the proportion of 35 % were superior to the indexes of other plans,comparing with using low grade iron ores with the proportion of 29 %, the average of tumbler index increased by 2.49 %, while fuel consumption decreased by 2.22 kg/t, the amount of SFCA increased obviously and pores became distributed and their size decreased in mineralogical structure of sinter, average RDI decreased by 7.24%, softening temperature range reduced down 18 ℃.

关 键 词：低品位矿 配比 烧结 

分 类 号：TF046.4[冶金工程—冶金物理化学]