钨多金属硫化矿分离废水处理及循环利用研究

对粤北某钨多金属硫化矿加温脱药的废水进行了试验分析，发现直接返回原流程中，对铜、钼、铋回收率影响较大，因此对废水进行了处理。通过系统研究发现主要是废水中的残留药剂及悬浮物对浮选产生了影响，通过混凝沉淀吸附的方式，以25mg·L-1 XN-3为絮凝剂、20 mg·L-1 PAC为助凝剂，加入20 g·L-1活性炭为吸附剂，沉降120min后，COD和SS的脱除效果明显，COD脱除率为49.46%。对处理后的回水进行选矿试验，和小型试验相比，除钼精矿钼品位有所降低以外，改质后的回水对铜、钼、铋分离影响不大，实现了加温脱药废水的零排放。

Treatment and recycling of wastewater from separation of tungsten polymetallic sulfide ore

The treatment of wastewater from a tungsten polymetallic sulfide ore in northern Guangdong Province was studied. It was found that the recovery of copper, molybdenum and bismuth was greatly affected by the direct return of the wastewater. Through systematic research, it was found that the residual reagents and suspended solids in the wastewater had an impact on the flotation.The removal efficiency of COD and SS was 49.46% after sedimentation for 120 min with 25 mg / L xn-3 as flocculant, 20 mg / L PAC as coagulant aid and 20 g / L activated carbon as adsorbent. Compared with the small-scale test, the treated return water has little effect on the separation grade and recovery rate of Cu, Mo and Bi, except that the molybdenum grade of the molybdenum concentrate is reduced. It shows that the heating and deacidification wastewater can be reused by stages and realize zero discharge.