FIELD: material grinding.
SUBSTANCE: attrition mill is proposed, which has a bowl of runners and grinding rollers. The runner bowl is configured to rotate relative to the grinding rollers around the middle axis of the runner bowl in the direction of rotation of the runner bowl, so that the grinding rollers roll along the running path of the runner bowl around the axis of rotation of the roller. At least one of the grinding rollers is rotated by an angle of separation in the direction corresponding to the direction of rotation of the runner bowl, so that the axis of rotation of the roll passes at a radial distance from the average axis of the runner bowl. The spreading angle ranges from 1 degree to 9 degrees.
EFFECT: invention provides effective grinding of lumpy bulk material.
18 cl, 4 dwg
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