铜阳极泥综合渣中碲的回收

某铜冶炼厂铜电解阳极泥处理过程中产生的综合渣中含碲量较高，为此进行了从该渣中浸出碲的试验研究。试验结果表明：采用常规酸浸工艺不能获得令人满意的碲浸出率；而采用以硫酸为浸出剂、KMnO₄为氧化剂的氧化酸浸工艺，在浸出温度为80 ℃、液固质量比为5：1、KMnO₄用量为0.008 g/g（对原料）、硫酸浓度为3.6 mol/L、浸出时间为5 h的条件下，碲的浸出率达到90.09%，同时可使渣中97.81%的铜被浸出，浸出液可进一步提取碲和铜。

Tellurium Recovery from General Slag of Copper Anode Sludge

The general slag produced in treating the anode sludge of copper electrolysis in a copper smelter has a high tellurium content and test is made on recovering the tellurium from the slag by leaching. The results indicate that satisfactory tellurium leaching rate can not be obtained by conventional acid leaching processes. An oxidizing acid leaching process with sulfuric acid as lixiviant and KMnO₄ as oxidant can obtain a tellurium leaching rate of 90.09% at a leaching temperature of 80 ℃, liquid to solid ratio of 5∶1, KMnO₄ dosage of 0.008 g/g (of raw material), sulfuric acid concentration of 3.6 mol/L and leaching time of 5 h. Meanwhile, 97.81% copper in the slag can also be leached out and further extraction of tellurium and copper can also be made from the leaching solution.