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
Key words
nickel slag/coal-based hydrogen-carbon coupling reduction/iron-containing phases/metallization ratio
维普
万方数据