... 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 ... ; Applicable: Coal, Mineral powder and so on; Modle no.: 2 roller;We will test the machine at workshop with customer, until ...