铜钼混合精矿磁浮联合工艺分离试验研究

为解决德兴铜矿铜钼分离工艺硫化钠用量大、产生的碱性废水中COD含量高、废水处理成本高等问题，结合铜钼混合精矿粒度细、铜钼矿物组成简单、单体解离度高的特点，开展了磁浮联合工艺选矿试验研究。通过条件试验确定了较优的磁选工艺参数，磁选扩大试验获得了磁选精矿产率39.16%、铜品位29.27%、钼损失率6.08%的指标；对磁选尾矿进行了浮选分离试验，获得了精矿钼品位46.54%、钼作业回收率93.97%的指标；综合计算表明，采用磁浮联合工艺处理含铜25.56%、含钼1.04%的铜钼混合精矿，可获得铜品位26.02%、铜回收率99.79%的铜精矿及钼品位46.54%、钼回收率88.30%的钼精矿，铜钼分离指标较优。此外，由于磁选作业提前分离出近40%的高铜低钼铜精矿，大幅降低了浮选处理量，使硫化钠等浮选药剂用量降低40%以上，显著降低了碱性废水的COD含量及后续水处理成本，具有显著的经济效益和环保效益。

Separation Test Study on the Combined Process of Magnetic Separation and Flotation for Copper and Molybdenum Mixed Concentrate

In order to solve the problems of large consumption of sodium sulfide， high COD contents in alkaline wastewater and high cost of wastewater treatment in Dexing Copper Mine， combined with the characteristics of fine particle size， simple component of minerals contained copper or molybdenum and high degree of monomer dissociation， the tests combined process of magnetic separation and flotation was carried out to bulk concentrate of copper and molybdenum. Through condition test， the better magnetic separation process parameters were determined. The magnetic separation extended test was carried out， and the magnetic separation results showed that the yield， copper grade and molybdenum loss rate of the concentrate were 39.16%， 29.27% and 6.08% respectively. The flotation separation test on magnetic separation tailings was carried out， and the flotation results showed that the molybdenum grade and molybdenum operation recovery rate were 46.54% and 93.97% respectively. The comprehensive calculation showed that the bulk concentrate containing 25.56% Cu and 1.04% Mo was treated by magnetic and flotation combined process，copper concentrate with Cu grade of 26.02% and recovery rate of 99.79% and molybdenum concentrate with Mo grade of 46.54% and recovery rate of 88.30% were obtained. The separation indexes of copper and molybdenum was very ideal. In addition， due to a yield of nearly 40% copper concentrate was separated by magnetic separation， the flotation amount was greatly reduced， the dosage of sodium sulfide and other flotation agents were reduced by more than 40%， the COD content of alkaline wastewater and the cost of water treatment were significantly reduced， which had significant economic and environmental benefits.