酸化水玻璃对钼矿浮选的影响

Effect of Acidified Sodium Silicate on the Floatation of Molybdenite

钼矿浮选时通常用水玻璃作为硅酸盐的抑制剂。将酸化后的水玻璃在实验室对新华钼矿矿石进行浮选,试验结果表明酸化水玻璃在改善浮选指标的同时可降低浮选药剂的用量。采用1段粗选、1段扫选、4段精选工艺流程进行开路试验,使用酸化水玻璃获得的最终精矿钼品位为41.83%、回收率为36.37%,尾矿钼品位为0.030%、钼损失率为12.50%,与未酸化水玻璃相比,精矿钼品位提高16.80个百分点,尾矿钼损失率减少1.50个百分点。

Sodium silicate is generally used as depressant of silicate mineral in the floatation of molybdenite. Acidified sodium silicate was used in the laboratory flotation test of Xinhua molybdenum and the test result shows that acid sodium silicate can reduce the dosage of other reagents in flotation while improving the flotation performance. In the open-circuit test of a process composed of one rougher, one scavenger and four cleaners using acidified sodium silicate, a final concentrate assaying 41.83% at a Mo recovery of 36.37% and tails grading 0. 030% at a Mo recovery of 12.50% were produced, a 16.80 percentage-point increase in concentrate grade and a 1.5 percentage-point decrease in Mo loss in tails compared with the results achieved in the test with non-acidified sodium silicate.