ROLL CRUSHER AND CRUSHING METHOD IN USE FOR ROLL CRUSHER

摘要

An object to be crushed is fed into a crushing chamber defined between a pair of rollers facing each other and is compressed and crushed between these rollers. A flange (12) is formed at both ends of either one of the rollers (3) to cover the lower parts of both end openings of the crushing chamber. The remaining portions of the both end openings of the crushing chamber are covered with a holding member (11) disposed fixedly. This structure can prevent the object from overflowing from the crushing chamber. If one of the pair of rollers is used as a driving roller with the other being permitted to rotate freely and the two are rotated at low speed at an initial stage, even coarse particles can be forcibly entrapped and crushed. The crushing capacity of the roll crusher can be improved by setting the crushing gap between the rollers to 0.6 to 2.4 times a particle size that permits 80% of an object to pass and by controlling feed quantity so that the quantity of the passing object is within the range of 0.5 to 0.8 times the theoretical capacity of the crusher.