Abstract: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 hydrophilic, hydrophilic, floatability significantly worse.