某钼尾矿浸泡液pH变化及镍溶出规律研究

通过105 d的连续静态浸泡试验，研究了某钼尾矿浸泡液pH值及Ni²⁺离子浓度随浸泡时间的变化规律。结果表明：该尾矿对酸性溶液有很强的中和能力，可将初始pH值为3.5~6.0的酸性溶液在2~8 d内中和到pH=7左右的中性状态并长期维持不变；尾矿粒度越细，经浸泡后Ni²⁺的溶出浓度越大；总体上，Ni²⁺的溶出浓度在25 d时达到最高值，此后开始下降并围绕某一平均值发生震荡。

Investigation on the pH Variation of the Soaking Solutions and the Rules of Nickel Release from a Molybdenum Tailing

After 105 d continuous static soaking tests,the variation rule of the pH value of the soaking solutions and the ion concentration with soaking time for a molybdenum tailing is investigated.The results showed that this tailing can well neutralize the acidic solutions of pH values ranged from 3.5 to 6 to neutral state (pH=7) within 2~8 days and then always maintained this state.The more fine the tailing is,the more thick the Ni²⁺ ion release solution is.In general,Ni²⁺ ionic concentration reached its maximum values within 25 d,and then declined,following with oscillating around some average values.