从高压碱浸液中提取钼钨新工艺

针对某氧化钼钨粗精矿高压碱浸后得到的浸出液钼钨含量均较高、钼钨分离困难的特点,确定了钼钨浸出液镁盐净化除杂、钼钨共沉淀、干燥、钼钨酸铵制备的工艺流程,主要考察了氯化铵用量、沉淀时间、pH、温度、溶液浓度对钼沉淀率的影响。结果表明,最终获得的产品含Mo 47.57%、WO310.13%,杂质磷、砷分别为0.0027%、0.041%,产品符合生产钨钼合金的要求。

New Process for Molybdenum and Tungsten Extraction from High Pressure Alkaline Leaching Solution

According to the characteristics of high tungsten and molybdenum content in the high pressure leaching solution of tungsten and molybdenum oxide rough concentrate, a new process for molybdenum-tungsten extraction was adopted including purification with magnesium salt, molybdenum-tungsten co-precipitation, drying, preparation of ammonium molybdate-tungstate. The effects of ammonium chloride dosage, precipitation time, pH, temperature, and solution concentration on molybdenum precipitation rate were investigated. The results show that the final products, i.e., ammonium molybdate-tungstate, contain 47.57% Mo and 10.13% WO3, respectively, and the impurities of phosphorus and arsenic are 0.0027% and 0.041%, respectively. This product meets requirement of molybdenum-tungsten alloy production.