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采用氯化法浸出铜阳极泥分铜渣中的金、硒、碲,并采用硫酸亚铁选择性还原浸出液中的金。结果表明:在最佳浸出条件即浸出时间150min、浸出温度60℃、氯酸钠浓度65g/L、液固比4∶1、氯化钠浓度50g/L、硫酸浓度300g/L下,金浸出率为93.7%,硒浸出率为96.5%,碲浸出率为76.4%;用硫酸亚铁还原氯化浸出液中的氯金酸是完全可行的,金还原率可达99.7%,还原产物中金以单质形式存在,基本不含单质硒、碲及其他杂质。
Leaching out the gold, selenium and tellurium in the copper anode slime by using the chlorination method, and selectively reducing the gold in the leachate by ferrous sulfate. The results showed that when the optimum leaching conditions were leaching time 150min, leaching temperature 60 ℃, sodium chlorate concentration 65g / L, liquid-solid ratio 4:1, sodium chloride concentration 50g / L and sulfuric acid concentration 300g / L, The rate of 93.7%, the leaching rate of selenium 96.5% and the leaching rate of tellurium 76.4%. It is feasible to reduce the chloroauric acid in the chloride leaching solution with ferrous sulfate, the gold reduction rate can reach 99.7% Elemental forms exist, basically free of elemental selenium, tellurium and other impurities.