(1. 昆明理工大學(xué) 冶金與能源工程學(xué)院，昆明 650093；
2. 昆明理工大學(xué) 復(fù)雜有色金屬資源清潔利用國家重點實驗室，昆明 650093)
摘 要: 研究赤鐵礦法處理高鐵閃鋅礦浸出液過程中ZnSO4和MgSO4濃度對除鐵率及赤鐵礦渣性質(zhì)的影響，討論元素Zn、Mg和S在赤鐵礦渣中的存在形態(tài)及形成機理。結(jié)果表明，除鐵率隨ZnSO4濃度的升高而增加，隨MgSO4濃度的升高而降低。增加硫酸鹽的濃度可以得到結(jié)晶形態(tài)更好的晶體。赤鐵礦的粒度和S含量隨硫酸鹽濃度的升高而降低，比表面積隨硫酸鹽濃度的升高而增加。Zn濃度和Mg濃度的合理存在范圍分別為80~100 g/L和小于10 g/L；Zn以ZnSO4的形式存在于赤鐵礦表面，少量的Mg以夾帶的方式存在于赤鐵礦渣中。
關(guān)鍵字: 赤鐵礦；除鐵；高鐵閃鋅礦；硫酸鋅；硫酸鎂
（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
