摘要：根据粉体颗粒所带饱和电量和颗粒的直径成正比的关系,提出一种新的粉体分级的方法———静电切向分级法,研究粉体带电颗粒在静电场中运动规律以及在粉体分级中的应用。

关键词： 静电；超细粉体；切向分级

Abstract：A new method the static electric tangential grading used in ultrafine powders is put forward．T he method according to the saturated electric charge containing by powder is in direct proportion to the diamer of the powders which is used to study electrification powders kinetic regulation in static electric field and the application in poweders grading．

Keywords：static electricity；ultrafine powder；tangential grading