从载金炭上解吸金的无氰解吸工艺研究　Ⅰ.甲醇蒸馏法  

ELUTION OF GOLD FORM CARBON BY THE METHANOL DISTILLATION PROCEDURE WITHOUT CYANIDE

作　　者：林海玲[1] 范必威[1] 胡兵团 

机构地区：[1]成都理工学院应用化学系,成都610059

出　　处：《离子交换与吸附》1998年第6期504-508,共5页Ion Exchange and Adsorption

基　　金：地矿部"八五""九五"重点推广项目

摘　　要：本文研究了黄金生产过程中从载金炭上解吸金的一种新工艺——甲醇蒸馏解吸法的基本原理及工艺条件。结果表明，该工艺最佳解吸条件为：液固比为4：1，载金炭经过含有50％甲醇、4％氢氧化钠的预处理液，加热80℃预处理3h；再经50％的甲醇液80℃预浸1h；最后在80℃蒸馏回流4h。解吸金后的尾炭品位在100g／t以下，金的解吸率可超过98％，整个解吸过程约8—9h。In this paper, the optionalconditions of elution of gold from carbon by the methanol distillation procedure without cyanide are investigated. The procedure involves pretreatment of loaded carbon with NaOH/methanol followed by elution with methanol-water vapour and condensate. The results show that gold is stripped from the carbon in 8-9 hours in 1 bed volume of solution to give concentratied gold eluntes. Desorption of An is higher than 98%.

关 键 词：蒸馏法 金 解吸 甲醇 载金炭 

分 类 号：TF831.032[冶金工程—有色金属冶金]