Ball mills are one of the most commonly used devices for grinding bulk materials, using grinders in the form of steel, cast iron, ceramic or special plastic balls as the working medium.
The material is fed into the working chamber, where it is gradually crushed as a result of centrifugal force, numerous hammer blows and friction against the working and sieve surfaces.
Principle of operation of ball mills
The principle of operation is based on the rotation of a cylindrical drum in which grinding balls are located together with the feed material. During the rotational movement, the balls rise and fall, exerting an impact, abrasion and crushing effect on the material. As a result, the raw material is gradually crushed until the required granulation is achieved.
Ball mill operation
Ball mills can operate both in dry mode, used for example in the production of mineral powders, and in wet mode, used for suspensions and sludges in the ceramics or chemical industries. Operating parameters – such as rotational speed, degree of ball filling of the drum, grinding time or type of grinders used – allow for precise control of the degree of fineness and structure of the final product.
Construction
A ball mill consists of several key components that ensure efficient grinding of materials with different properties.
- Body
Cylindrical or conical, steel, armor-lined of steel, ceramic, rubber or plastics for various industries - Grinding balls
Steel, cast iron, ceramic or plastic balls of various diameters for efficient grinding - Drive system
A geared motor moves the drum, ensuring the balls rise and fall for impact and abrasion - Feed and take-up system
Material fed through a funnel or screw, collected through a sieve, grate or overflow; in wet mills, additional discharge for the suspension - Types of discharge
Through, overflow or chamber – depending on the needs of granulation and multi-stage grinding - Separation system
Air separators or hydrocyclones separate fine from coarse fractions in closed circuits
Technical parameters
The technical parameters of the devices, their size and equipment are selected individually each time based on technical parameters, available infrastructure and the Investor’s requirements.
We are able to produce any type of ball mill.
Advantages of ball mills
These devices are characterized by high grinding efficiency, the possibility of obtaining very fine fractions, product homogeneity and high flexibility of applications.
Thanks to their simple and durable design, ball mills can operate continuously, in open or closed systems (with separators and classifiers).
Examples of ball mill projects
Other processes
We shape the future of production
If you are looking for a general contractor for machines or an entire production line, please contact us.
Phone number +48 77 484 42 23
E-mail wakro@wakro.com.pl
Krępna, ul. Zdzieszowicka 51
47-330 Zdzieszowice, Polska