coal dust ball press machine: 1, Round, square, oval and any shape can be custom-made; 2, Test at workshop with the customer. Coal , Ball Press Machine, OEM Manufacturer in China,30t/h1,Ball press machine: Ball press is a widely used in many range, this machine can press the raw materials for pelletize or press ball, such as coal dust, aluminum powder, active carbon, aluminum oxide, bauxite, ...