Experimental research in leaching of copper-bearing tailings enhanced by ultrasonic treatment  

作　　者：ZHANG Jie WU Ai-xiang WANG Yi-ming CHEN Xue-song 

机构地区：[1]School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, China [2]School of Civil and Environment Engineering, Beijing University of Science and Technology, Beijing 100083, China

出　　处：《Journal of China University of Mining and Technology》2008年第1期98-102,共5页中国矿业大学学报（英文版）

基　　金：Projects 2004CB619205 supported by the National Basic Research Program of China;50574099 by the National Natural Science Foundation of China;06JJ30024 by the Natural Science Foundation of Hunan Province

摘　　要：On the basis of an experiment in ultrasonic enhanced ammonia leaching of tailings, the effect of ultrasonic waves on copper dissolution was studied. The mechanism of ultrasonic enhanced tailing leaching was analyzed and a technique of ultrasonic enhanced pipe leaching of tailings was proposed. The results show that tailings with ultrasonic treatment can leach up to 89.5% of Cu, which is 13.5% more than those without the treatment. Ultrasonic technology is capable of improving leaching rates and the overall recovery of tailing leaching. Impact waves and micro jet streams can strip and erode affected surfaces of tailing particles to create new active surfaces and disturbances can intensify mass transfer processes in "dead zones". The technique of ultrasonic enhanced pipe leaching of tailings is a combination of existing agitation enhancement with ultrasonic enhancement and can improve mineral recovery.On the basis of an experiment in ultrasonic enhanced ammonia leaching of tailings, the effect of ultrasonic waves on copper dissolution was studied. The mechanism of ultrasonic enhanced tailing leaching was analyzed and a technique of ultrasonic enhanced pipe leaching of tailings was proposed. The results show that tailings with ultrasonic treatment can leach up to 89.5% of Cu, which is 13.5% more than those without the treatment. Ultrasonic technology is capable of improving leaching rates and the overall recovery of tailing leaching. Impact waves and micro jet streams can strip and erode affected surfaces of tailing particles to create new active surfaces and disturbances can intensify mass transfer processes in “dead zones”. The technique of ultrasonic enhanced pipe leaching of tailings is a combination of existing agitation enhancement with ultrasonic enhancement and can improve mineral recovery.

关 键 词：ultrasonic treatment TAILINGS LEACHING PIPE active surfaces mass transfer 

分 类 号：X751[环境科学与工程—环境工程]