目前,国外一些钨矿公司为了提高钨金属实收率,先在选矿过程生产含WO_315—30％的低品位钨精矿,然后采用水冶流程处理,可使钨的选冶回收率提高到90％以上。然而,这种低品位钨精矿含硅、钙等杂质相当高,有些甚至含硅高达50％以上,致使这类钨精矿不但难于分解,而且压煮液中含杂质高,钨的产品质量很难达到要求。 At present, in order to increase the actual yield of tungsten metal, some foreign tungsten mining companies first produce low-grade tungsten concentrates containing WO_315-30% in the beneficiation process, and then use the water-smelting process to increase the recovery rate of tungsten smelting and selecting %the above. However, the low-grade tungsten concentrates containing silicon, calcium and other impurities is quite high, and some even contain up to 50% more than silicon, resulting in not only difficult to decompose this type of tungsten concentrate, and pressure cooker containing impurities, tungsten product quality Difficult to meet the requirements.