不同磨矿方式对闪锌矿浮选的影响

Effect of Different Grinding Methods on Floatation of Sphalerite

通过单矿物浮选试验、浮选动力学计算、扫描电镜分析,研究了水射流磨矿与球磨磨矿(铁介质球、玛瑙介质球)不同磨矿方式对闪锌矿浮选的影响。浮选试验与润湿性结果表明,闪锌矿在不同磨矿方式下浮选回收率大小为:水射流磨矿>玛瑙介质球磨矿>铁介质球磨矿,浮选速度大小为:水射流磨矿>玛瑙介质球磨矿>铁介质球磨矿。说明闪锌矿经水射流磨矿后表面疏水性最好,可浮性最高,玛瑙介质球磨矿次之,铁介质球磨矿最差。扫描电镜分析结果表明,经水射流磨矿,闪锌矿瞬间粉碎解离,表面纯净,保持天然可浮性;经玛瑙介质球磨矿,闪锌矿之间发生物理化学反应,可浮性降低;而经铁介质球磨矿,闪锌矿之间及闪锌矿表面与铁球发生反应,生成大量亲水性的羟基铁化合物,亲水性增强,可浮性显著变差。

Through single mineral flotation test, flotation kinetics calculation and SEM analysis, the influence of different grinding ways of water jet grinding and ball milling （ iron medium ball and agate medium ball） on sphalerite flotation is studied. The results of flotation test and wettability show that the recovery rates and speed of sphalerite under different grinding ways are ranked in the following descending order： water jet grinding 〉 agate medium ball milling 〉 iron medium ball milling. It shows that the surface hydrophobicity of sphalerite is the best, the floatability is the highest, the agate medium ball mill is the second, and the iron medium ball mill is the worst. The results of scanning electron microscopy showed that the sphalerite was broken and dissociated instantaneously by water jet grinding, and the surface was pure, and the natural floatability was maintained. By the agate medium ball mill, the physical and chemical reaction occurred between the sphalerite and the floatability;The iron ore milling medium, and between the surface and the iron sphalerite sphalerite reaction of hydroxy iron compounds generate large hydrophilie, hydrophilic, floatability significantly worse.