In order to obtain particular fractions, the material should be crushed. To do this, several crushers are usually used. For example, for primary crushing, one type of crusher is used (for example, a jaw crusher). In order to receive medium-sized particles, a different type of crusher is required (for example, an impact crusher). If you need to get a finer fraction, you’ll need a third type of crushers (hammer, roller, etc.). Each crusher is designed for work with a particular particle size input, it often transfers the finished particles to a screen. In order to get powders (as a result of even greater material grinding), one should use mills. If the size of the rocks is too large even for the first stage of processing, special rock splitters are used.
Crushers are used to obtain a fine fraction of raw materials, which can be used for particular purposes or be further crushed with the help of mills.
During operation, raw materials of different sizes are transported by excavators, front-end loaders, and dump trucks. As a result, they enter the feeder. The feeder delivers the raw material into a preliminary classifier (screen) for the selection of particles that don’t have to be grind.