红土镍矿烧结工艺优化试验研究  

Research on optimization experiment of sintering process of laterite nickel ore

作　　者：胡梦杰 陈铁军[1,2] 潘料庭 周仙霖 孙化国[3] 刘佳文 罗艳红 HU Mengjie;CHEN Tiejun;PAN Liaoting;ZHOU Xianlin;SUN Huaguo;LIU Jiawen;LUO Yanhon(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Hubei Province Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan 430081,Hubei,China;Guangxi Beigang New Materials Co.,Ltd.,Beihai 536000,Guangxi,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]冶金矿产资源高效利用与造块湖北省重点试验室,湖北武汉430081 [3]广西北港新材料有限公司,广西北海536000

出　　处：《烧结球团》2022年第4期9-17,32,共10页Sintering and Pelletizing

基　　金：湖北省教育厅科学研究计划资助项目(Q20191110);中冶长天基础研究基金资助项目(2020JCYJ06)。

摘　　要：为了改善红土镍矿烧结性能,本文在分析红土镍矿物化性能的基础上,研究水分、无烟煤配比、碱度、布料方式、无烟煤粒度对烧结性能的影响,对优化前、后的烧结各项指标进行对比分析,并从工艺矿物学揭示相关优化机理。结果表明:当混合料水分为18.5%、无烟煤配比为7.2%、碱度为1.6,采用偏析布料以及无烟煤粒度为1~5 mm时,烧结矿的转鼓强度为58.02%,成品率为75.06%,烧结机利用系数为0.91 t/(m^(2)·h),固体燃料消耗为131.74 kg/t。工艺矿物学研究表明:优化后烧结矿的微观结构由大孔薄壁结构转化为大孔厚壁结构,其铁尖晶石由片状转化为粒状,且其晶粒相互连通,微观结构更为紧密,强度得到大幅提高。In order to improve the sintering performance of laterite nickel ore, based on the analysis of the mineralization properties of laterite nickel ore, the effects of moisture, anthracite ratio, alkalinity, burden distribution mode and anthracite size on sintering performance are studied, the sintering indexes before and after optimization are compared and analyzed, and the relevant optimization mechanism is revealed from process mineralogy.The results show that when the mixture moisture is 18.5%,the proportion of anthracite is 7.2%,and the alkalinity is 1.6;when the segregation of burden distribution and anthracite size of 1 to 5 mm are adopted, the drum strength of the sinter is 58.02%,the yield rate is 75.06%,the utilization coefficient of the sintering machine is 0.91 t/(m^(2)·h),and the solid fuel consumption is 131.74 kg/t.Process mineralogy studies show that the optimized microstructure of sinter is transformed from a macroporous thin-walled structure to a macroporous thick-walled structure;while hercynite is transformed from flaky to granular, the hercynite grains are interconnected, the microstructure is more compact, and the strength is greatly improved.

关 键 词：红土镍矿 烧结 偏析布料 无烟煤粒级 

分 类 号：TF046.4[冶金工程—冶金物理化学]