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为了开发宏量钨钼分离的低成本方法,研究不同工艺条件对硫酸亚铁沉淀分离钨钼的影响。结果表明:钨钼分离的最佳反应温度为10℃,在此温度下反应时间大于7h后钨钼的分离系数不再增加;沉淀剂溶液的慢速加入可提高分离效果;当溶液中n(H+)/n(W)低于1/1时,往中性溶液中添加酸对分离过程有利;当溶液中铵浓度不高于3mol/L时,钨的沉淀率高,分离系数也较大。本方法可有效处理含一定杂质的工业溶液。这些结果表明铁盐在工业上用于钨钼分离的潜力大。
In order to develop a low-cost method for macro-tungsten-molybdenum separation, the effects of different process conditions on the separation of tungsten and molybdenum by ferrous sulfate were studied. The results showed that the optimum reaction temperature for tungsten and molybdenum separation was 10 ℃. When the reaction time was longer than 7h, the separation coefficient of tungsten and molybdenum did not increase. Slow addition of precipitant solution could improve the separation efficiency. When n When the concentration of ammonium in the solution is less than 3mol / L, the precipitation rate of tungsten is high and the separation coefficient is also larger . The method can effectively deal with certain industrial impurities containing impurities. These results indicate the great potential of iron salts for the industrial separation of tungsten and molybdenum.