含砷难浸金矿的硫氰酸盐法提金  

Leaching Gold from Refractory Gold Ore Bearing Arsenic by Thiocynate Process

作　　者：杨中民[1] 王光灿[1] 杨春芬[1] 

机构地区：[1]云南大学化学系

出　　处：《云南化工》1997年第2期24-27,共4页Yunnan Chemical Technology

摘　　要：研究了含砷难浸浮选金精矿的预处理。通过在空气流中进行二阶段焙烧（４３０℃和６５０℃）和碱溶液吸收Ａｓ２Ｏ３和ＳＯ２，脱砷和脱硫率分别可达９８％和９９％，并且有效地避免了空气污染。预处理后金矿在酸性溶液中，用硫氰酸铵溶液浸取。考察了硫氰酸铵浓度、ＭｎＯ２用量、酸度、温度、时间和微波场对浸金的影响。在最佳浸金条件下，金浸出率可达９３％。The pretreatment of arsenical refractory floatation gold concentrate was studied.In air flow,this ore was roasted for two hours at 430℃ and 650℃ respectively,As 2O 3 and SO 2 were simultaneously adsorbed by a solution of 40% NaOH.The dearsenication and desulfuration of this method have reached 98%, 99% respectively,and the air pollution has been effectively avoided.By thiocynate process,microwave and various factors effecting leaching gold were investigated,under optimum conditions,gold leaching rate was able to reach 93.0%.

关 键 词：难浸金矿 砷 硫氰酸盐法 提纯 炼金 浸出 氰化 

分 类 号：TF831.321[冶金工程—有色金属冶金]