Advantages of the ball mill

Ball milling boasts several advantages over other systems: the cost of installation and grinding medium is low; the capacity and fineness can be adjusted by adjusting the diameter of the ball; it is suitable for both batch and continuous operation; it is suitable for open and closed-circuit grinding; it is applicable for materials of all degrees of hardness.

Varieties 

Aside from common ball mills there is a second type of ball mill called a planetary ball mill.Planetary ball mills are smaller than common ball mills and mainly used in laboratories for grinding sample material down to very small sizes.A planetary ball mill consists of at least one grinding jar which is arranged eccentrically on a so-called sun wheel.The direction of movement of the sun wheel is opposite to that of the grinding jars (ratio: 1:−2 or 1:−1).The grinding balls in the grinding jars are subjected to superimposed rotational movements, the so-called Coriolis forces.The difference in speeds between the balls and grinding jars produces an interaction between frictional and impact forces, which releases high dynamic energies.The interplay between these forces produces the high and very effective degree of size reduction of the planetary ball mill.

Vertical roller mill

A vertical roller mill is a grinding machine used to grind materials into extremely fine powders for mineral processing, paint, pyrotechnics, cement and ceramics. It is an energy-saving alternative to ball mills.

Overview

Vertical roller mill is a kind of grinding machine for cement, raw meal, cement clinker, slag and cinder.It has the advantages of simple structure, low manufacturing and use costs.There are many types of vertical mills, but the working principle is basically the same.All of these forms have a roller (or a grinding part equivalent to a roller), and the roller follows the track of the disc in a horizontal circular motion exerting vertical pressure on the outer grinding roller.The material on the disc is compressed and sheared by joints cut, crush.

Operation

Material grinding process motor through reducer rotating drive disc, the material falls from the mill under the central entrance and exit, under the action of centrifugal force to the disc edge by the roller to move and the crushing, grinding out lap after the material was speed up the flow to and vertical mill with one of the separator, after the meal by the separator back to the mill, the re-grinding; powder while grinding out with air, dust collection equipment in the system to collect down, that is, products.Established through the mill in the pneumatic conveying of materials, a larger air flow rate, which can use waste heat of gas, at the same time dry grinding operations.