复杂钼钨矿石溶浸试验

Leaching Experiment of Low-grade Complex Molybdenum Tungsten Ore

某钼钨矿石钼、钨品位较低,其中钼含量0.36%、钨含量0.88%,-38μm占90%,矿石中矿物物相复杂、有用矿物粒度小且较为分散,矿物颗粒连生情况极其复杂。采用焙烧—化学浸出的方式回收钨、钼,开展了液固比、药剂用量、浸出温度和浸出时间的研究。研究表明:在液固比6 mg/g、氧化剂A用量10 kg/t、碱性浸出剂B和C用量分别为80 kg/t和9 kg/t、浸出时间4 h、浸出温度80℃的条件下,钼的浸出率为83.79%,钨的浸出率为39%。通过细磨强化,-20.043μm占90%,在同样条件下钼浸出率达到94.11%,钨浸出率为60.74%,取得了较好的浸出效果。

The grade of molybdenum and tungsten in a molybdenum and tungsten ore is low,with molybdenum content of 0.36%and tungsten content of 0.88%,and-38μm accounts for 90%.The mineral matter in the ore is complex,the useful mineral particle size is small and relatively dispersed,and the continuous growth of mineral particles is extremely complex.Tungsten and molybdenum was extracted and recovered by roasting-chemical leaching.Effects of ratio of liquid to solid,dosage of leaching agent,leaching temperature and leaching time on leaching were carried out.The results show that leaching rate of molybdenum and tungsten is 83.79%and 39%respectively under the conditions including ratio of liquid to solid of 6 mg g,dosage of oxidant A of 10 kg t,dosage of alkaline leaching agent B and C is 80 kg t and 9 kg t respectively,leaching time of 4 h,and leaching temperature of 80℃.Through fine grinding strengthening with-20.043μm accounts for 90%,under the same conditions,the leaching rate of molybdenum and tungsten is 94.11%and 60.74%respectively,and good leaching effect is obtained.