孔雀石分段硫化浮选行为及动力学基因特性研究

为改善孔雀石的硫化浮选效果，通过浮选试验，系统研究了孔雀石单矿物分段硫化浮选行为及动力学基因特性规律，确定了孔雀石的最佳硫化浮选段数。结果表明：硫化时间过长，孔雀石可浮性降低，适量硫化钠能提高孔雀石浮选速率，但浮选速率随时间延长而降低；硫化钠用量为 4 mg/L，硫化时间为 1 min，丁基黄药用量为 80 mg/L 时，孔雀石可浮性最好；添加碳酸铵可以改善孔雀石的浮选效果，当碳酸铵用量为 50 mg/L 时，对孔雀石活化效果最佳；分段硫化浮选过程中，每段孔雀石的浮选速率高低与浮选药剂的质量分配比例有关；适当增加硫化浮选段数，可以提高孔雀石的总回收率；孔雀石的最佳硫化浮选段数为三段，各阶段浮选药剂分配比例为 4∶2∶2。

Study on Flotation Behavior and Kinetic Gene Characteristics of Malachite by Staged Sulfurization

In order to improve the sulfurized flotation effect of malachite, the behavior and kinetic gene characteristics of the staged sulfurized flotation of malachite were systematically studied, and the optimal number of sulfurized flotation sections of malachite was determined by flotation tests. The results show that the floatability of malachite is reduced with the increase of sulfurized time, and the flotation rate of malachite increases with appropriate amount of sodium sulfide, but the flotation rate decreases with the increase of time; when the dosage of sodium sulfide is 4 mg/L, the curing time is 1 min, and the dosage of butyl xanthate is 80 mg/L, the floatability of malachite is the best; the flotation effect of malachite can be improved by adding ammonium carbonate and when the dosage of ammonium carbonate is 50 mg/L, the activation effect of malachite is the best; the flotation rate of each section of malachite is related to the mass distribution ratio of flotation reagents; the total recovery of malachite increases with the increase of the number of sulfurized flotation sections properly; the optimal number of sulfurized flotation sections of malachite is three, and the proportion of flotation agent distribution in each stage is 4∶2∶2.