SELECTIVE RECOVERY OF SILVER FROM AN ACIDIC SOLUTION BY CEMENTATION WITH COPPER

作     者：Yongbin Yang Tao Jiang Ganghua Fu Boquan He Zhucheng Huang 

作者机构：1. Department of Mineral Engineering Central South University of Technology 410083 Changsha China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：1998年第10卷第2期

页      面：40-43页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

主　　题：extraction cementation silver 

摘      要：An acidic solution containing 280 mg/l silver and others was treated. In order to selectively recover silver without losing other metallic elements from the solution, cementation was adopted with metallic copper. The kinetics of cementation reaction and copper dissolution and mechanism of copper consumption were studied. The results indicated that the rate of cementation reaction and copper consumption were markedly increased with the increase of temperature. For the same cementation recovery of silver , copper consumption at elevated temperature was much higher than that at ambient temperature . Cementation rate and copper consumption rate also increased with the increase of stirring velocity, while copper consumption at different stirring velocity for the same recovery of silver was almost not different. Studies on the chemical mechanism of copper consumption showed that Fe 3+ and residual leaching additive RH in the solution were the main factors that caused extra copper consumption in acidic solutions.