某铜矿山浮选尾矿中铜硫回收工艺技术

我国西南部某特大型铜矿山浮选尾矿中铜品位0.21%,硫品位2.10%,含金0.11g/t。该矿石中目的矿物嵌布粒度细,与脉石矿物嵌布关系复杂,另外,因该矿山建设投产较早,受限于当时选矿技术水平相对较低,选矿指标不理想,有较多的铜损失在尾矿中。随着国家经济发展对资源需求量的逐步提高,针对老尾矿开展资源回收再利用,实现有价资源的应收尽收,具有重要的实践意义。因此,本文针对该尾矿开展了详细的选矿试验研究,通过工艺及药剂制度的研究,开发了高效捕收剂BKL-1,采用“铜硫依次优先浮选”的工艺流程,实验室闭路试验获得了铜品位20.11%,含金3.11g/t,铜回收率81.63%、金回收率25.39%的铜精矿及硫品位42.15%、硫回收率81.18%的硫精矿,在减少尾矿排放的同时,进一步实现了有用资源的综合回收。

Recovery technology of copper and sulfur from flotation tailings of a copper mine

A large copper mine contains copper grade 0.21%, sulfur grade 2.10% and gold grade 0.11g/t in flotation tailings, which locates in southwest of China.SIn addition, due to the early construction and operation of the mine, the mineral processing technology was relatively low at that time, and the mineral processing index was not ideal, and much more copper was lost in the tailings.SWith the gradual increase in the demand for resources from national economic development, it is of great practical significance to carry out resource recovery and reuse for old tailings and realize the receivable collection of valuable resources.STherefore, this paper carried out a detailed beneficiation test study on the tailings. Through the study of the process and reagent system, the efficient collector BKL-1 was developed. The process of "copper and sulfur priority flotation in sequence" was adopted.SThe copper concentrate with copper recovery of 81.63% and gold recovery of 25.39% and the sulfur concentrate with sulfur grade of 42.15% and sulfur recovery of 81.18% can further realize the comprehensive recovery of useful resources while reducing tailing discharge.