... shape can be custom-made; 2, Turn-key production line service. Coal Dust, Ball Press Machine, OEM Manufacturer in China,50t/ ... machine can press the raw materials for pelletize or press ball, such as coal dust, aluminum powder, active carbon, aluminum ... cryolite, chemical fertilizer, plastic, lime stone, pigment, urea, etc. 2,Ball Forming Machines working Principle This series of type pressure machine ...