某高碳高次生铜铜矿选矿工艺优化研究

新疆某高碳高次生铜铜矿矿石中矿物组成复杂,铜矿物种类繁多,同时由于鳞片石墨的存在,致使现场生产铜精矿品质低,总尾矿中有价金属流失严重。针对以上问题,开展了详尽的工艺矿物学及工艺优化小型试验研究,开发出阶段磨矿-易浮快浮-中矿及粗选尾矿再磨再选的创新工艺流程,获得了良好的选矿指标。在浮选药剂优化过程中,采用石灰、水玻璃和单宁作为细粒石墨、次生泥质及被铜离子活化的硫矿物的抑制剂,保证了再磨再选精矿的产出,避免了中矿的循环累积。采用推荐的优化工艺,总铜精矿中铜、金、银回收率提高了24.05%、14.44%、9.32%。

WANG Jianan

The mineral composition of a high carbon and high secondary copper ore in Xinjiang is complex and there are many kinds of copper minerals. At the same time, due to the existence of flake graphite, the quality of copper concentrate produced on site is low and the loss of valuable metals in the total tailings is serious. In view of the above problems, a detailed small-scale experimental study on Process Mineralogy and process optimization was carried out, and an innovative process flow of stage grinding, easy floating and fast floating, medium ore and roughing tailings regrinding and re concentration was developed, and good beneficiation indexes were obtained. In the process of flotation reagent optimization, lime, water glass and tannin are used as inhibitors of fine graphite, secondary argillaceous and sulfur minerals activated by copper ions to ensure the output of regrinding and re concentration concentrate and avoid the cyclic accumulation of medium ore. Using the recommended optimized process, the recoveries of copper, gold and silver in the total copper concentrate were increased by 24.05%, 14.44% and 9.32%.