Patent ID: 8079536
Filing Date: 2011-12-20
Classification: B02C,Y10T

Abstract:
1. A method for detaching a frozen charge from the inner wall of a grinding pipe mounted rotatably about a horizontal axis of rotation, the frozen charge being formed during a standstill of the grinding pipe and having a center of gravity positioned in a starting position below the horizontal axis of rotation, the method comprising the steps of: from a starting position in which the center of gravity of the frozen charge is positioned in the starting position below the horizontal axis of rotation, controlling a drive device of the grinding pipe to control the angle of rotation and the speed of rotation of the grinding pipe; and varying the speed of rotation of the grinding pipe by the drive device such that the varied rotational speed creates detaching forces caused by inertia to act on the frozen charge, the detaching forces created by the varied rotational speed causing the frozen charge to detach from the inner wall of the grinding pipe, wherein a maximum value of the angle of rotation about the starting position is selected smaller than 180°; wherein the frozen charge is wetted.