从次氧化锌粉中提高锌锗回收率的工艺实践研究  

Research on the Process Practice of Improving Zinc Germanium Recovery from Secondary Zinc Oxide Powder

作　　者：李建福 林琳 涂文鸿 王东 陈翠萍 LI Jian-fu;LIN Lin;TU Wen-hong;WANG Dong;CHEN Cui-ping(Xinlian Environmental Protection Technology Co.,Ltd.,Gejiu 661000,China;School of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]鑫联环保科技股份有限公司,云南个旧661000 [2]昆明理工大学环境科学与工程学院,云南昆明650500

出　　处：《世界有色金属》2024年第18期194-197,共4页World Nonferrous Metals

摘　　要：在次氧化锌粉回收锌的常规工艺中,锗分散于中浸液和高酸浸出渣等中,锗入中浸液占比较大,造成锗损失到中浸液后续除铁工序的铁渣中,严重降低了锗回收率。本试验研究了中性浸出、高酸浸出过程中各主要影响因素对锌、锗、铟浸出率的影响。得到最佳条件:中性氧化浸出采用双氧水加入量2~2.5mL/L,浸出温度75℃~80℃,浸出时间1.5~2.0h,终点控制pH5.0~5.2;高酸浸出采用始酸浓度为210~230g/L,锰粉加入量6~8g/L,液固比5~6:1,浸出温度为80℃~85℃,浸出时间为2.0h~2.5h。结果表明,优化浸出工艺后,中浸上清液中的锗小于1mg/L锗入中上清液的比例小于8%,锌、铟、锗总浸出率可达到96.02%、91.58%、87.90%。In the conventional process of secondary zinc oxide powder treatment,germanium is dispersed in the neutral leaching solution and high acid leaching slag,etc.T he germanium into the neutral leaching solution accounts for a large proportion,resulting in germanium loss to the iron slag in the neutral leaching solution in the subsequent iron removal process,which seriously reduces the germanium recovery rate.In this experiment,the influence of the main influencing factors on the leaching rate of zinc,germanium and indium during neutral leaching and high acid leaching was studied.T he optimum conditions were obtained:neutral oxidation leaching with hydrogen peroxide addition of 2~2.5mL/L,leaching temperature of 75℃~80℃,leaching time of 1.5~2.0h,and endpoint control of pH5.0-5.2;high-acid leaching with the starting acid concentration of 210-230g/L,manganese powder addition of 6-8g/L,liquid-to-solid ratio of 5-6:1,leaching temperature of 80℃~85℃,leaching time of 2.0~2.5h.T he results show that after optimizing the leaching process,the germanium in the middle leach supernatant is less than 1 mg/L the proportion of germanium in the middle leach supernatant is less than 8%,and the total leaching rate of zinc,indium and germanium can reach 96.02%,91.58%and 87.90%.

关 键 词：锌 锗 回收率 浸出率 中性浸出 高酸浸出 

分 类 号：X758[环境科学与工程—环境工程]