钨矿石中都伴生有磷、砷、硅等杂质元素。在钨精矿碱分解过程中,部分杂质元素与钨一起进入溶液。在制取纯钨化合物之前,必须净化除去这些杂质元素。下面就钨冶炼过程中净化除磷、砷、硅作些介绍。一、矿石预处理除杂质白钨精矿中的磷、砷、硫等杂质元素只要以容易与酸作用的化合物形态存在,通过两步酸浸处理后,原矿中的磷便降至200ppm Tungsten ore is associated with phosphorus, arsenic, silicon and other impurity elements. During the alkali decomposition of tungsten concentrates, some of the impurity elements enter the solution together with tungsten. Before making pure tungsten compounds, these impurity elements must be removed. Following the purification of phosphorus in the smelting process of phosphorus, arsenic, silicon for some introduction. First, the ore pretreatment impurity impurity scheelite concentrate of phosphorus, arsenic, sulfur and other impurities as long as the role of compounds with easy acid form exists through two-step acid leaching, the ore phosphorus dropped to 200ppm