研究在硫酸锌溶液中用萃取法提取锗，萃取剂为7815(氧肟酸)，稀释剂为磺化煤油，添加剂为T试剂，反萃剂为NaOH，原料液为云南会泽铅锌矿硫化锌高温、高酸、高铁浸出溶液；工艺就萃取体系的选择，金属的萃取平衡，工艺参数的确定，工艺流程的设计以及工艺流程的串级实验等进行了深入研究，取得了锗萃取率大于96%，反萃率大于97%，锗精矿含锗大于30%的结果。

This process is concerned with solvent extraction of Ge from zinc sulfate solution with 7815 (hy-droxamic acid as) extractant, sulfonated kerosene as diluent, T reagent as additive and NaOH as re-extract ant. The feed liquid is the leachate of Yunnan Huize lead-zinc ore leached at high temperature by strong sulphuric acid and ferric solution. The temperature is about 70～80℃ . The concentration of sulphuric acid and ferric inos are 90 g/L and 10〜15 g/L respectively. Selection of extraction system, metal exaction balance, process parameters, process design and the overall process experiment have been investigated. The Ge extraction is higher than 96% , are re-extraction is higher than 97% , Ge conlent in the germanium concentrate, which is ohtained by nentralization is higher than 30% .