基于工艺矿物学分析提高金浮选尾矿选矿回收率的研究

某金矿浮选尾矿金品位偏高，具有回收价值，对该样品开展了工艺矿物分析和选矿试验研究。工艺矿物学分析表明，尾矿中金矿物主要以三种形态存在，分别为难解离金矿物、易解离金矿物、单体易回收金矿物，后两种金矿物回收较为容易。试验结果表明，将其磨矿细度(-200目含量)提高到60%，浮选时间延长7 min，尾矿金品位降低至0.18 g/t，通过将磨矿细度(-200目含量)提高到80%，尼尔森重选也可将尾矿金品位降低到0.17 g/t，为现场制定改造方案提供技术支持。

Study on improving floatation tailings of a gold mineral recovery based on process mineralogy analysis

The flotation tailings of a gold mine have a high grade and recovery value. The process mineral analysis and test research were carried out in order to provide guidance for proposing a better recovery scheme. Process mineralical analysis shows that the gold mineral in tailings mainly exists in three forms, namely, refractory dissociable mineral, easily dissociable mineral and monomer mineral. The latter two forms are relatively easy to be recovered. The dressing test of grinding fineness and flotation time for the tailings sample shows that by increasing the grinding fineness (-200-mesh content) to 60% and extending the flotation time by 7 min, the tailings grade can be reduced to 0.18g/t. Increasing the grinding fineness (-200-mesh content) to 80% and using Nielsen method can also reduce the tailings grade to 0.17 g/t. This study will provide the technical support for the renovation plan of the production line.