韶冶真空炉锗渣氧压浸出液中锗的分离与富集

Separation and enrichment of germanium from oxygen pressure leaching solution in vacuum furnace slag

摘要:

以韶关冶炼厂真空炉渣氧压浸出液为原料，以P204及Rex t-32为萃取剂萃取分离与富集锗组分，考察萃取有机相组成、酸度pH、萃取时间、相比等因素，对锗分离与富集效果的影响．研究结果表明：pH＝2．0，相比V （O）/V （W）＝1∶1，萃取10 min ，一次萃取锗萃取率达96．89，；富锗有机相用4mol/L氢氧化钠溶液反萃锗，相比V （O ）/V （W ）＝3∶1，反萃15 min ，经3级反萃后反萃液中锗含量为7．81 g/L，反萃率为95．37，（以渣计）；锗反萃液用1∶1硫酸中和，控制终点pH为8．0～8．5，可得到品位为37．62，的富锗料，锗沉淀率为90．51，．

Abstract:

The effects of organic phase composition ,pH ,extration time ,phase ratio on extraction and en-richment of germanium component were investigated using P204 and Rext-32 as extractant ,and the oxygen pressure leaching solution in vacuum furnace slag as raw material .The results showed that the germanium extraction rate of 96 .89， was obtained when pH value was at 2 .0 ,phase ratio (O/W) at 1∶1 and extrac-ting time for 10min ,and germanium-rich organic phase was stripped with 4N sodium hydroxide solution , with stripping time for 5min and phase ratio at 3∶1 ,germanium content in stripping solution was up to 7 .82 g/L after three-level stripping ,stripping rate was 95 .37， (in slag count );using the stripping solu-tion with 1∶1 sulfuric acid and controlling the end pH from 8 .0 to 8 .5 ,a grade of 37 .62， germanium-rich material with germanium precipitation being 90 .51， was obtained .