Leaching of Silver from Boorchi Ag-Pb Ore in Mongolia with Acidic Thiourea Solution

被引：2

作者：

Nyamdelger Shirchinnamjil ^{[1
]}

杨超 ^{[1
]}

方兆珩 ^{[1
]}

机构：

[1] Institute of Process Engineering,Chinese Academy of Sciences

来源：

过程工程学报 | 2008年 / 04期

关键词：

silver; thiourea leaching; ammonia carbonate solution; Boorchi Ag-Pb ore;

D O I：

暂无

中图分类号：

TF111.31 [];

学科分类号：

080601 ;

摘要：

A hydrometallurgical process to extract silver from the silver-lead ore in Boorchi,Mongolia by using thiourea leaching solution is studied in this work.Through the observation of optical and scanning electron microscopes,and energy spectral analysis,it is determined that 5 kinds of silver minerals exist in the ore,including argentite,Ag-tetrahedrite,Ag-Zn-Sb-tetrahedrite,freibergite and acanthite.The experimental results of direct thiourea leaching of the ore show that 56%～60% of silver is leached.The main reason for the low leaching rate is due to silver minerals enveloped in galena and other minerals,even though the ore is ground to the particle size of 75μm.When the ore is pretreated with ammonium carbonate solution under oxidation,the experimental results of thiourea leaching show that the leaching rate of silver increases to near 75% with the pretreatment.Based on the leaching experiments,a principle hydrometallurgical technological route to extract silver from the Ag-Pb ore is proposed.

引用

页码：725 / 730

页数：6