难选氧化钼矿提取氧化钼的试验研究

Experimental Study on the Molybdenum Oxide Extraction From a Refractory Molybdenum Oxide Ore

采用两次循环盐酸池浸的方法提取内蒙古难选氧化钼矿中的氧化钼,矿石含钼1.20%、粒度10～20mm,两次浸出的液固比均控制为0.3,浸出时间均为8h,浸出液盐酸浓度分别为200g/L和220g/L。结果表明,此工艺平均钼浸出率78.80%,氨水中和沉淀回收率96.22%,全流程钼回收率超过75%,产品钼含量为43%。

The process of sump leaching with hydrochloric acid for two cycles was adopted to extract molybdenum oxide from a refractory molybdenum oxide ore produced in Inner Mongolia.The ore contains 1.20% Mo,and its particle size is 10~20 mm.The ratio of liquid to solid is controlled at 0.3 during leaching,and leaching duration of either cycle is 8 h.The HCl concentrations of leaching solutios are 200 g/L and 220 g/L,respectively for the first cycle and the second cycle.The results show that the average Mo leaching rate of the above process is 78.80%,the recovery of ammonia neutralization-precipitation process is 96.22%,and Mo content of the product is 43%.