Abstract

The present invention relates to a method and apparatus for crushing a mineral material. Then, the mineral material is delivered in a crushing space (6) towards crushing means (8), whereby at least a portion of the material flow is discharged via a screen (20). The remaining mineral material is arranged to meet transfer and screening as well as crusher drums (10, 11) provided in the crushing space such that the transfer and screening drum continues pre-screening while simultaneously transferring the mineral material towards the crusher drum (11). Finally, the mineral material remaining in the crushing space is by crusher blades (19) of the crusher drum (11) subjected to mechanical machining wedging the mineral material against a crusher plate (21) and decreasing the particle size thereof in order for the mineral material to be finally crushed into a particle size to be discharged from the crushing space.

IPC Classes  ?

• E02F 3/96 - DredgersSoil-shifting machines mechanically-driven with arrangements for alternate use of different digging elements
• E02F 3/40 - DippersBuckets
• B02C 4/08 - Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
• B02C 4/12 - Crushing or disintegrating by roller mills with a roller co-operating with a stationary member in the form of a plate
• B02C 13/09 - Disintegrating by mills having rotary beater elements with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
• B02C 23/08 - Separating or sorting of material, associated with crushing or disintegrating
• B07B 1/46 - Constructional details of screens in generalCleaning or heating of screens