选择性絮凝-柱浮选回收钼精选尾矿中的微细粒辉钼矿

Recovering fine molybdenite from molybdenum cleaning tailings by selective flocculation-column flotation

针对某钼精选尾矿细泥含量大、辉钼矿嵌布粒度微细的特点,提出选择性絮凝-柱浮选新工艺,即先将钼精选尾矿进行选择性絮凝,采用高效的微细粒分选的设备旋流-静态微泡浮选柱进行分选,解决了该钼精选尾矿中微细粒辉钼矿的回收问题。利用浮选柱半工业试验系统,考察处理量、分散剂用量、捕收剂用量、絮凝剂用量、起泡剂用量和抑制剂用量等因素对浮选指标的影响,并优化工艺和操作参数条件,在此基础上进行连选试验。研究结果表明:采用选择性絮凝-柱浮选工艺,在浮选柱"一粗三精一扫"闭路流程的情况下,可获得钼精矿钼品位为34.40%、铜精矿铜品位为16.83%,钼回收率为73.97%、铜回收率为67.48%的良好指标。该技术的研究为钼精选尾矿中微细粒辉钼矿的回收提供了新思路。

For some molybdenum cleaning tailings with high fine mud content and micro-fine disseminated molybdenite, a new selective flocculation-column flotation process was proposed. The molybdenum cleaning tailings were first selectively flocculated, and the high efficiency fine mineral processing equipment, cyclonic-static microbubble flotation column was used for sorting. Using the flotation column semi-industrial test system, the effects of the amount of treatment, the amount of dispersant, the amount of collector, the amount of flocculant, the amount of foaming agent and the amount of inhibitor on the flotation index were investigated, and the process and operating parameters were optimized. On this basis, the continuous separation tests were carried out. The results show that the selective flocculation-column flotation process can obtain the molybdenum concentrate molybdenum grade of 34.40% and the copper concentrate copper grade of 16.83% in the case of the flotation column ＂one coarse, three fine and one sweep＂ closed-circuit process, the molybdenum recovery rate is 73.97%, and the copper recovery rate is a good indicator of 67.48%.The technology provides a new idea for the recovery of fine-grained molybdenite in molybdenum cleaning tailings.