(1.昆明理工大学国土资源工程学院，昆明 650093；
2.广东省科学院资源综合利用研究所，广州 510651；
3.稀有金属分离与综合利用国家重点实验室，广州 510651；
4.广东省矿产资源开发和综合利用重点实验室，广州 510651)
摘 要: 氧化铁锰矿物中通常含有银、铜等伴生元素，多以类质同象或亚显微包裹的形式与主元素锰结合共生，赋存状态复杂。Mn-Ag-Cu结合矿在化学浸出过程中，三种离子可能会交互产生不良影响。因此，基于HSC Chemistry软件进行了Mn-Cu-Fe的电势-pH分析，构建了化学浸出平衡体系。根据铜在不同pH值和电势条件下的物质组成，推断出酸浸后残余的铜会消耗氰化物，影响银的回收，据此进行了氰化钠用量优化试验。结果表明，在酸浸终点pH=3.0时，残余铜的影响较小，氰化钠的用量可以从6000g/t降低至2500g/t，对矿山含氰尾渣的治理以及含氰废水的回收利用具有一定意义。最终在工业化研究中，通过调整硫酸添加方式，确保了酸浸作业pH值在2~3的范围内，取得了银浸出率92.30%、铜浸出率30.45%的稳定试验指标。
关键字: HSC Chemistry软件；锰银铜结合矿；化学解离；浸出机理；工业化
（1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Institute of Resources Comprehensive Utilization, Guangdong Academy of Sciences, Guangzhou 510651, China;
3.State Key Laboratory of Rare Metal Separation and Comprehensive Utilization, Guangzhou 510651, China;
4.Guangdong Provincial Key Laboratory of Development &Comprehensive Utilization of Mineral Resources, Guangzhou 510651, China）
Abstract:The oxide minerals of Fe and Mn contain Ag and Cu usually, which are mostly associated and combined with manganese in the form of isomorphism and submicroscopic inclusion. The occurrence state is complex.Mn, Cu and Fe ions may have adverse effects on each other in the process of chemical leaching. Therefore, the potential-pH analysis of Mn-Cu-Fe was carried out based on HSC chemistry software, and the chemical leaching system was constructed at the same time. According to the composition of copper under different pH and potential conditions, it is inferred that the residual copper in acid leaching will consume cyanide and affect the recovery of silver. Based on this, the optimization test of sodium cyanide dosage was carried out. The results show that, the remaining copper has little effect on the results at the end of acid leaching pH value of 3.0, and the dosage of sodium cyanide can be reduced from 6000g/t to 2500g /t. It is valuable for the treatment of cyanide tailings and the reuse of cyanide wastewater.Finally, in the industrial-scale research, by adjusting the way of adding H2SO4, the pH value of acid leaching is ensured to be in the range of 2-3.The silver leaching rate is 92.30% and that of copper is 30.45% in the stability test.
Key words: HSC chemistry software; manganese-silver-copper combined ore; chemical dissociation;leaching mechanism;industrialization
