Crusher and a method of crushing material

A vertical shaft impact crusher for crushing material, said crusher comprising:

• a rotor for accelerating a first flow of material to be crushed,
• a first feed means for vertically feeding the first flow of material to the rotor,
• a housing comprising a wall with a circumferential impact wall section against which the accelerated first flow of material may be crushed,
• a second feed means for feeding a second flow of material to be crushed into the path of the accelerated first flow of material, wherein
• the second feed means comprises means for forming at least one hillside on which the second flow of material may slide, the hillside having a slope being substantially tangential in relation to the rotor for directing the second flow of material in a direction having a substantially tangential component in relation to the rotor, such that the second flow of material will have a substantially tangential component of movement in relation to the rotor when reaching the path of the first flow of material.