The Leaching Characteristics of Heavy Metals out of Copper Sulfide-mine Tailings
To look into the ionic release laws of the sulphide tailings in some copper mine, the effects of the soaking period, temperature, oscillating speed, and pH of the solution on the heavy metals ionic release were investigated through static soaking leaching experiments. The results show that Cu2+,Zn2+, Pb2+, Cr3+ are of different leaching behaviors with soaking period. The ionic concentration in soaking solution for four ions has a great gap. Zn2+ is more easily released out of sulfide tailings than Cuz+, Pb2+, Cr3+, and the ion release concentrations are not proportion to their contents in the tailings. The time for each ion to reach its maximum concentration are different. The minimum concentration do not occur at the first day. Each ion concentration shows different fluctuation characteristic during soaking process. Solution pH, oscillating speed, and temperature affect the releases of Cu2+, Zn2+, Pb2+, Cr3+ out of the tailings to different extent. The effect of pH value on ion release for the four ions ranks as Zn2+＞Cu2+＞pb2+＞Cr3+, the oscillating speed ranks as Pb2+＞Zn2+＞Cu2+＞Cr3+, and the temperature ranks as Cr3+＞Pb2+＞Zn2+＞Cu2+.
Sulfide-mine railings Heavy metal Static soaking Ionic leaching
S. J. Ma G. F. Wang X.M. Qin W. Mo Z. L. Hu M. Q. Lin M. J. Yang J. L. Yang X. J. Su
College of Resources and Environment, Guangxi University, Nanning, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3097-3102
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）