(1. 昆明理工大学 冶金与能源工程学院，昆明 650093；
2. 昆明理工大学 复杂有色金属资源清洁利用国家重点实验室，昆明 650093)
摘 要: 研究赤铁矿法处理高铁闪锌矿浸出液过程中ZnSO4和MgSO4浓度对除铁率及赤铁矿渣性质的影响，讨论元素Zn、Mg和S在赤铁矿渣中的存在形态及形成机理。结果表明，除铁率随ZnSO4浓度的升高而增加，随MgSO4浓度的升高而降低。增加硫酸盐的浓度可以得到结晶形态更好的晶体。赤铁矿的粒度和S含量随硫酸盐浓度的升高而降低，比表面积随硫酸盐浓度的升高而增加。Zn浓度和Mg浓度的合理存在范围分别为80~100 g/L和小于10 g/L；Zn以ZnSO4的形式存在于赤铁矿表面，少量的Mg以夹带的方式存在于赤铁矿渣中。
关键字: 赤铁矿；除铁；高铁闪锌矿；硫酸锌；硫酸镁
（1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization in Yunnan Province,
Kunming University of Science and Technology, Kunming 650093, China）
Abstract:The effects of ZnSO4 and MgSO4 concentrations on the iron removal rate and the properties of residues for treating the leaching liquor of high iron sphalerite by hematite process were investigated, the existent form and formation mechanism of Zn, Mg and S in hematite were discussed. The results show that the iron removal rate increases with increasing the ZnSO4 concentration and decreases with increasing the MgSO4 concentration. Better crystal morphology of precipitates can be obtained by increasing the sulfate concentration. Higher sulfate concentration produced precipitates with finer particle sizes, lower S contents and bigger specific surface area. A reasonable existence range of Zn and Mg are 80~100 g/L and ＜10 g/L, respectively. Zn exists in hematite surface as ZnSO4, low levels of Mg in the precipitates present as tiny liquid inclusions in the hematite particles.
Key words: hematite; iron precipitation; high iron sphalerite; zinc sulfate; magnesium sulfate
