SKY Mining and Construction Machinery Co., Ltd. is a hi-tech, engineering group. We are specialized in the research, development, and production of industrial crushing, powder grinding, mineral processing equipments and other related devices. Our products have been sold to 120 countries and areas of Southeast Asia, East Europe, South America, the Middle East and Africa etc, and more foreign markets will be promoted in future.
We hold "Pursuing the Technology and Quality" as our management concept all the time. Relying on absorbing world leading crushing and powder processing technology, advanced management and quality control system, as well as our full efforts, SKY has earned high reputation among our customers.
The "Critical Speed" for a grinding mill is defined as the rotational speed where centrifugal forces equal gravitational forces , This is the rotational speed where balls will not fall away from the mill's shell , the formula used for Critical Speed is:
27 Jun 2013 , The ball size is one of the critical factors for determining the mill , the curve in the smaller region and A is the S value for the standard size, xo , such as the mill rotational speed, ball filling, powder filling, mill diameter, and ball diameter , Austin and Klimpel  derived such an equation for predicting the.