含铜金矿堆浸过程中铜的行为研究

摘要

Zijinshan gold mine is the largest gold mine in China,and belongs to the low-grade and oxide gold mine.As the mining elevation reduction,the content of copper in the gold ore is increasing constantly,and resulting in much difficulty in dump leaching,carbon absorbing,desorption and electro winning of gold loaded carbon etc. We had deeply investigated the process of Zijinshan gold mine and analyzed the process parameter and the reactions of copper on the dump leaching process.To deduced the effects of copper on gold leaching and adsorption and the amount of sodium cyanide,some suggestions had been given on the process parameter optimization of which optimizing the process parameters based on the actual situation,decreased the concentration of free cyanide in leaching solution as much as possible and the copper concentration of its dump leaching-carbon adsorption system and reducing the leaching of copper.It is of important guiding significance for the gold dump leaching and carbon adsorption production of Zijinshan gold mine.%紫金山金矿是中国第一大金矿，属于低品位氧化金矿，随着开采标高的降低，金矿中的铜含量不断升高，给金矿堆浸、炭吸附和载金炭解吸-电积等工艺造成了较大的影响。详细考查了紫金山金矿的生产工艺，对生产工艺参数进行了深入分析，剖析了含铜金矿堆浸过程中铜的行为，并对生产工艺参数优化提出了建议，应根据实际情况优化工艺参数，尽量降低浸出液中的游离氰化物浓度，减少铜矿物的浸出，并增加喷淋液中铜氰络合物转化为氰化亚铜的量，降低含铜浸出堆浸-炭吸附体系的铜浓度，从而减小铜对金浸出和吸附的影响，降低氰化钠的用量，这对紫金山金矿堆浸和炭吸附生产具有重要的指导意义。