Grinding drum consists of a body made in the form of a metal hollow cylinder with abrasive elements located on its surface. At the same time, longitudinal grooves are made along the body with a step from 5 to 100 mm at an angle from 0º to 40º to the axis of the body, and metal inserts with a layer of abrasive material applied to their outer surface are used as abrasive elements, the height of the insert being 1-7 mm greater than the height of the body, and the length of the insert being 1-5 mm greater than the length of the body, and flanges are fixed at both ends of the body.