镍渣球团煤基氢-碳耦合还原  

On coal-based hydrogen-carbon coupling reduction of nickel slag pellets

作　　者：杨路顺 张志龙 李彬[1,2] 杜雪岩 Yang Lushun;Zhang Zhilong;Li Bin;Du Xueyan(Lanzhou University of Technology 1.School of Materials Science and Engineering;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050

出　　处：《材料与冶金学报》2024年第6期539-545,共7页Journal of Materials and Metallurgy

基　　金：甘肃省重点研发计划项目(23YFGA0055);甘肃省科技重大专项计划项目(22ZD6GA008);国家自然科学基金区域创新发展联合基金项目(U22A20175)。

摘　　要：利用煤基氢-碳耦合还原镍渣中的含铁物相,研究了掺碳球团和掺煤球团在还原过程中的物相演变、微观形貌及金属化率.结果表明,两种球团中含铁物相的演变过程一致,均由铁橄榄石相逐渐转变为金属铁相和辉石相,且在反应各阶段,掺煤球团还原产物中的铁颗粒尺寸均大于掺碳球团还原产物中的铁颗粒尺寸,且排布更为整齐、致密.在相同的还原条件下,掺煤球团的金属化率比掺碳球团的金属化率高出20%左右.该研究为镍渣高效提铁提供了理论依据.The iron-containing phase in nickel slag was reduced by coal-based hydrogen-carbon coupling,and the phase evolution,micromorphology,and metallization rate of carbon-doped and coal-doped pellets during the reduction process were studied.The results show that the evolution behavior of iron-containing phases in the two kinds of pellets exhibit consistency,and both gradually transform from fayalite phase to metallic iron and pyroxene phases.The size of metallic iron particles derived from coal-doped pellets is larger than that of carbon-doped pellets at all reaction stages,and particle arrangement is more uniform and dense.Under the same reduction conditions,the metallization rate of coal-doped pellets is about 20%higher than that of carbon-doped pellets.This study provides a theoretical basis for efficient iron extraction from nickel slag.

关 键 词：镍渣 煤基氢-碳耦合还原 含铁物相 金属化率 

分 类 号：TF19[冶金工程—冶金物理化学]