【摘要】 低锗单宁锗采用"盐酸+盐浸出脱杂—三段水逆流洗涤—煅烧"工艺可以明显提高锗精矿的品质。在液固比(4.0～4.5)∶1、浸出脱杂温度40～60℃、浸出脱杂时间120～180min时,杂质Ca、Pb、Zn和Fe脱除率分别约为90%、95%、92%和80%,脱杂单宁锗中含Ge约4%,产率约45%。煅烧产率约15%,Ge收率>95%,煅烧锗精矿含Ge约27%。更多还原

【Abstract】 It’s possible to upgrade germanium concentrate of low tannic acid germanium by leaching impurity with HCl+ NaCl solution,three-sections water countercurrent washing and calcination.Germanium concentration in tannic acid germanium after impurity leaching and washing is about 4% with production rate of about 45% and impurity removal rates is Ca ～90%,Pb 95%,Zn 92% and Fe 80% under the conditions including L/S=(4.0～4.5)∶1,leaching temperature of 40～60℃,and leaching time of 120～180 min.Germanium content in calcination concentrate is about 27%,and germanium concentrate yield rate is about 15% with germanium recovery rate of 95% above.更多还原