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《Metal Mine》 2009-11
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Experimental Study on Influencing Factors of Ammonia Leaching for A Copper Tailing

Gao Baosheng1 Wang Hongjiang1 Wu Aixiang1 Zhang Yi2 Jin Zhengcong2(1.University of Science and Technology Beijing,2.Diqing Mining Company of Yunnan Copper Corporation)  
This paper takes some tailings of copper mine as the object of study and uses the general alkaline process leaching(ammonia to soak) technology to launch the experiment for the purpose of determining the impact of the tailings leaching factors and levels.The test result indicated that copper leaching rate related to the ammonia density,leaching cycle,temperature,liquid solid proposition,activator and so on.The conditions of this experimental obtained best leaching:The density between 100 g/L,the temperature in 40 ℃,the amount of activator used 35 g/L,leaching cycle 1.5 h,the liquid solid ratio is 3:1.The highest leaching rate is 29.8%,the activator NH3-NH4HF2 system causes the copper leaching rate to enhance about 2%.
【Fund】: 云南省科技强省计划课题(编号:2007AD001);; 新世纪优秀人才支持计划项目(编号:NECT-07-0070);; 国家自然科学基金项目(编号:50774011)
【CateGory Index】: TD926.4
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