黄钾铁矾法炼锌的沉矾过程研究

Study on the Jarosite Process in Zinc Hydrometallurgy

黄钾铁矾法可以有效处理铁、砷、锑等杂质含量高的锌精矿,并能有效回收其中的有价金属。沉矾工序是黄钾铁矾法处理的关键步骤,可产出富铟的铁矾渣和供中性浸出用的上清液,其主要任务包括除铁、沉铟、排除系统中多余的硫酸根以及脱除部分金属杂质离子。文章对黄钾铁矾法工艺处理高铁高铟锌精矿的沉矾过程进行了研究,得出了杂质离子浓度变化规律并对其过程机理进行了初步分析。研究结果表明92.3%的锌进入沉矾液,94.87%的铟、97.80%的铁及绝大部分砷、锑进入沉矾渣。

Jarosite process can effectively extract zinc from zinc concentrate with high concentration of iron, arsenic and antimony. Jarosite slag forming is the key step in the process. It not only forms the jarosite slag riched indium, but also can supply solution which can be used in neutral leaching. The main purpose is to remove iron, indium, excessive SO42- and some other impurities. Jarosite process to handle zinc concentrate with high concentration of iron and indium was studied, the variation of impurities in the process was obtained, also, the mechanism was preliminary analyzed. The result show that 92.3 % zinc entered in solution, 94.87% indium, 97.80% iron and the most of arsenic and antimony entered to the slag.