Crushers are used at containers' outlets, e.g. cement, lime or ashes silos. They crush lumps of material, that occurred during storage, before its further processing or transportation. There are different versions of lump crushers available, depending on the required flow and outlet size.
Agglomerated material is milled with specially shaped active knives (installed on the revolting rollers) and passive knives (screwed to the corpse).
If the material is extremely hard and solid and it is necessary to control the size of lumps of the milled material, one should use crusher with additional sieve. In such case the lumps are are stopped at the sieve and then are milled with the crusher's knives.