云南某炼锌渣中锗铟的硫酸浸出

稀散金属锗、铟是重要的战略资源，常伴生在铅锌矿或煤中，主要从锌冶炼渣或煤燃烧后的烟尘中提取。云南某铅锌矿冶炼厂的高硅炼锌渣中锗、铟含量分别为126.00、358.00 g/t，SiO2含量为24.62%，为高效低耗浸出其中的锗、铟，以硫酸溶液为浸出剂进行了浸出工艺条件研究。结果表明：在磨矿细度为-0.074 mm占81%、硫酸溶液的浓度为110 g/L、液固比为3、搅拌强度为350 r/min、浸出温度为70 ℃、浸出时间为4 h情况下，试样中锗、铟的浸出率分别达87.90和89.88%。

Germanium and Indium Leaching by Sulfuric Acid from a Zinc Smelting Slag in Yunnan

Rare metals germanium and indium are important strategic resources,they are commonly associated with lead-zinc ore or coal,and mainly extracted from zinc smelter slag and ash of burning coal.The content of germanium,indium and SiO2 is 126.00 g/t,358.00 g/t and 24.62%in zinc smelting slag with high silicon from a lead-zinc smelter in Yunnan.In or-der to high efficiently leaching the germanium and indium,acid-leaching technology was research.Results showed that the leac-hing rate of germanium and indium can reach 87.90%and 89.88%under the optimal conditions of grinding fineness of 81%-0.074 mm,sulfuric acid concentration 110 g/L,liquid-solid ratio of3,stirring speed of350 r/min,leaching temperature of70℃,leaching time of 4 h.