CAJ | 학술논문

采用氰化浸出工艺从预处理后的难处理金精矿中提取金、银。最佳氰化浸出条件为：液固比4∶1，保护碱Na2 CO3调节pH值9．5～10．5，氰化钠质量分数0．4％，氰化浸出96 h。在此条件下，金、银浸出率分别达到96．53％、75．37％。同时，探索了复合保护碱对金、银浸出率的影响，使用复合保护碱m（Na2CO3）∶m（NaOH）＝3∶1，金、银的浸出率分别达97．36％、75．59％，比采用单一保护碱Na2 CO3时分别提高0．83％和0．22％。
채용청화침출공예종예처리후적난처리금정광중제취금、은。최가청화침출조건위：액고비4∶1，보호감Na2 CO3조절pH치9．5～10．5，청화납질량분수0．4％，청화침출96 h。재차조건하，금、은침출솔분별체도96．53％、75．37％。동시，탐색료복합보호감대금、은침출솔적영향，사용복합보호감m（Na2CO3）∶m（NaOH）＝3∶1，금、은적침출솔분별체97．36％、75．59％，비채용단일보호감Na2 CO3시분별제고0．83％화0．22％。
Gold and silver were extracted from the pretreated refractory gold concentrate by cyanide process .Un-der the optimum cyanidate conditions which are the concentration of sodium cyanide of 4%,the liquid to solid ratio of 4∶1,and the adjusted pH with Na 2 CO3 of 9.5-10.5 and the leaching time of 96 h,leaching rate of gold and silver re-spectively reaches 96.53%and 75.37%.The effect of complex protective alkali on the leaching rate of gold and sil-ver was investigated.The influence of complex protection with alkali m(Na2CO3)∶m(NaOH) =3∶1 on the leaching rate is explored.The results show that leaching rate of gold and silver respectively were 97.36 % and 75.59 %, which is 0.83 %and 0.22 %higher than using Na 2 CO3 as single protective alkali .