... non-explosive materials with Mohr’s hardness below 6 and humidity below 8%, such as kaolin, limestone, calcite, talcum, marble, barite, gypsum ... tension rod on the cantilever end in the bearing house. With cantilever as a supporting point, grinding roller shall be ... device, blade on the shovel shelf will rotate synchronically together with grinding roller, which at the same time revolves around itself ...