... brittleness of materials such as coal, coal gangue, limestone, shale,, feldspar, gypsum, coke, bricks, brown iron ore, crushed stone, salt mine, ... into the crushing cavity, they are crushed by the rotating hammers, the crushed products which meet the required size can ... back to the crushed area for being re-crushed until they reach the required size.Technical parameters of Coal CrusherModelRotor speed ...