Ball mill is an important grinding in mineral processing production line equipment, the critical value of ball mill, here mainly refers to the rotational speed of ball mill barrel threshold for the effects of the production efficiency.
Critical speed is one of the main data measure grinding machine working condition. The rotational speed of ball mill cylinder speed directly decides the effect of grinding medium and grinding operations. If speed is slow, then the height of the steel ball was promoted is small, its own gravity fall in steel xie, the impact is very small, but the grinding effect is very strong, although can improve crushing rate, but the effect is too low.
Speed is the speed of the cylinder, and in the process of grinding ball and material, through expert precision calculation, there is a critical value in a small range, can make the material and reaches the state of grinding ball, if you can control the rotation speed, to control the ball consumption, the consumption of equipment efficiency and equipment, etc., to help save a lot of the cost of production.
When high speed, the height of the ball mill ball was promoted too high. The ball out of the barrel after rose to a certain height, fall along a parabolic trajectory, in throwing working state. In placement has great impact, ore main impact and shattered, grinding efficiency is highest.
When the ball mill speed exceeds a certain limit, the ball mill speed is high, the ball can follow the rotation of the cylinder without falling, in the centrifugal operation state. Steel ball no impact at this moment, grinding effect is very small, also make the grinding effect. Ball mill the outermost layer of the ball just with the cylinder rotate together instead of falling, the rotating speed of ball mill then referred to as the critical speed.
Critical speed of ball mill is directly proportional to its diameter D, the absolute value of critical speed is not easy to get, at present only the theory calculation formula of critical speed is widely used.
In the process of production, want to hold good ball mill speed threshold to reduce the consumption of steel ball and the purpose of saving the cost of beneficiation abrasion, is not easy to do. Liming will provide you with the best solutions, to provide you with the most comprehensive, the most advanced processing production line equipment, as well as the most suitable for your use, guarantee the customer production benefit maximization, website customer service 24 hours online welcome the choose and buy.