含锗氧化锌烟尘浸出锌锗的研究  

Study on Leaching of Zn and Ge from Ge-bearing Zinc Oxide Dust

作　　者：李衍林 邓志敢[2] 朱应旭 戴兴征 陆占清 张梅 邓海波 陈春林 LI Yan-lin;DENG Zhi-gan;ZHU Ying-xu;DAI Xing-zheng;LU Zhan-qing;ZHANG Mei;DENG Hai-bo;CHEN Chun-lin(Yunnan Chihong Zn&Ge Co.,Ltd.,Qujing 655011,Yunnan,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]云南驰宏锌锗股份有限公司,云南曲靖655011 [2]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《有色金属（冶炼部分）》2021年第7期49-54,69,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51804146,51964029);国家重点研发计划项目(2018YFC1900402);云南省应用基础研究计划项目(202001AT070079)。

摘　　要：采用富氧常压浸出—中和工艺处理含锗氧化锌烟尘,通过酸度控制和富氧浸出提高烟尘中锗的浸出率,同步控制溶液中铁价态与浓度。通过小型试验、扩大试验、工业化试验,烟尘在酸浸温度90℃、液固比7∶1、控制pH=0.3~0.5的条件下常压通氧酸浸4h;再控制矿浆pH=3.0~3.5、温度90℃、反应时间1.5h进行酸浸液的中和,锌浸出率达到90%以上,锗浸出率达到80%以上,同时可将溶液中Fe3+浓度控制在0.02g/L以内,有利于后续溶液中锗的高效分离回收。Germanium-bearing zinc oxide dust was treated by atmospheric oxygen enrichment leaching and neutralization.Leaching rate of Ge and Zn in dust was improved by controlled acidity and atmospheric oxygen enrichment leaching,and controlling concentration and valence of iron in solution.Through smallscale,expanded and industrial experiments,the results show that under the conditions of atmospheric oxygen acid leaching including leaching temperature of 90℃,L/S of 7mL/g,and leaching time of 4h,and neutralization conditions including pH value of solution of 3.0-3.5and reaction time for 1.5hunder 90℃,leaching rate of Ge and Zn in dust is 90%above and 80%above,respectively,and Fe3+concentration in solution is 0.02g/L below,which is beneficial to efficient separation and recovery of Ge in subsequent solution.

关 键 词：氧化锌烟尘 浸出 锌 锗 中和 

分 类 号：TF813[冶金工程—有色金属冶金]