A material feeding device for a VSI-crusher, and a method of crushing material.

摘要

A vertical shaft impact crusher comprises a rotor for accelerating a first flow of material to be crushed, a first feed means for feeding the first flow of material to the rotor, a housing against which the accelerated first flow of material may be crushed, and a second feed means for feeding a second flow of material to be crushed into the path of the accelerated first flow of material. The second feed means comprises an inner hopper (8) and an outer hopper (10). An outlet (14) is formed in said inner hopper (8) for allowing said second flow of material to enter a space (12) formed between said inner and outer hoppers (8, 10). A slide plate (36) is located in said space (12) adjacent to the outlet (14), the slide plate (36) being inclined in a direction being substantially tangential in relation to the rotor.