Abstract：The electrical characteristics characteristics of sulfur powder in the grinding process were tested and analyzed by employing small-sized ball grinder of high-frequency vibration to grind the sulfur. The results show that when the grinding speed is controlled at 1 200, 1 500 and 1 800 r/min, respectively, the time for the static electricity amount of sulfur flake to become saturation value is 40, 60 and 100 s, with the rising ratio of charge-to-mass ratio being 0.269, 0.470 and 0.700 nC/ (g·s) . The time for the static electricity amount of powder sulfur to become saturation value is 30, 40 and 70 s, with the rising ratio of charge-to-mass ratio being 0.416, 0.701 and 0.979 nC/ (g·s) . The amount of static electricity of sulfur powder ground by grinding media made from tungsten carbide is the lowest. The static electricity caused by stainless steel material is 1.39 times that by tungsten carbide. The static electricity caused by zirconia is 3.82 times that by tungsten carbide. The augmented wet-basis water content of sulfur powder can effectively reduce the static electricity amount on sulfur powder in the process of grinding. When the wet-basis water content is 0.8%, the saturated static electricity amount when the sulfur powder is ground is reduced to as low as nearly 0.

Keywords: sulfur; charge-to-mass ration; material for grinding; wet-basis water content

第一作者简介：付瑜（1991—），男，硕士研究生，研究方向为易燃易爆物料的粉碎与收集和工业通风与除尘技术。E-mail：710428172@qq.com。

通信作者简介：张明星（1982—），男，硕士，副研究员，硕士生导师，研究方向为粉体工程与设备和通风除尘与净化。E-mail：zhangmingxing@swust.edu.cn。