美国矿务局继研制出研磨粘土、云母、滑石等陶瓷原料用的蜗轮研磨机后,最近又对其进行改进,研制出制备无杂质高纯超细 SiC 粉末及其它高级陶瓷粉末的蜗轮研磨机。在改进的研磨机中,产品中的金属杂质是通过一定的构造分离的,其整个外部皆用超高分子量的聚乙烯。不存在介质污染问题,因为蜗轮研磨机的研磨是一个自磨过程——含有大磨粒或磨球与研磨物料具有相同的组分。蜗轮研磨机主要构造是一个圆柱形容器,一个笼形旋转器,带有一个自上而下的垂直拉 Following the development of a worm mill for grinding clay, mica, talc and other ceramic raw materials, the US Bureau of Mines has recently made improvements to develop a worm wheel mill for the preparation of high purity, ultra-fine SiC powder and other high-grade ceramic powders. In an improved mill, the metal impurities in the product are separated by a certain configuration, using ultra high molecular weight polyethylene throughout the exterior. There is no media contamination problem because milling of a worm wheel mill is a self-grinding process - with large abrasive particles or balls that have the same composition as the abrasive material. The main construction of a worm wheel mill is a cylindrical vessel, a cage rotator with a vertical pull from top to bottom