云南某铜金多金属矿中金的赋存特性及选矿工艺研究

以云南某铜金多金属矿为研究对象,探索了金在与其伴生的硫化矿、磁铁矿混合体系中的选矿特性及载体矿物对其选矿指标的影响。依据金在该矿石中的赋存状态、嵌布特征及其载体矿物的多样性等特点,采用了优先选铜再选硫,然后磁选铁矿物的工艺流程。通过精细化调控工艺参数,在最佳的综合条件下,获得的铜精矿铜品位为18.63%、含金63.24g/t,铜回收率为88.67%,金在铜精矿中的分布率为67.06%;硫精矿硫品位为47.86%、含金2.41g/t,硫回收率为86.16%,金在硫精矿中的分布率为15.08%;铁精矿铁品位为59.55%、含金1.20g/t,铁回收率为38.22%,金在铁精矿中的分布率为10.51%,为技术经济指标的提升和工艺改进提供了理论依据。

Study on the occurrence characteristics and beneficiation technology of gold in a copper - gold polymetallic ore in Yunnan province

Taking a copper - gold polymetallic ore in Yunnan province as the research object, this paper explores the beneficiation characteristics of gold in its associated sulfide ore and magnetite mixture system and the influence of carrier mineral on its beneficiation indexes. According to the occurrence state of gold in the ore, the characteristics of embedded distribution and the diversity of carrier minerals, the technological process of copper flotation, sulfur flotation and magnetic separation of magnet minerals was adopted. Under the best comprehensive conditions, the copper grade and gold content of the copper concentrate are 18.63%, 63.24g/t, the recovery rate of copper is 88.67%, and the distribution rate of gold in the copper concentrate is 67.06%. The sulfur grade of the sulfur concentrate is 47.86%, containing 2.41g/t gold, the sulfur recovery is 86.16%, and the distribution rate of gold in the sulfur concentrate is 15.08%. The iron grade of the iron concentrate is 59.55%, containing 1.20g/t gold, the iron recovery is 38.22%, and the distribution rate of gold in the iron concentrate is 10.51%, which provides a theoretical basis for improving technical and economic indicators and process improvement.