Detailed Product Description 1.This series of pressure-ball machine is a kind of powder material will be pressed like the ball of equipment.Many materials can be pressure groups, granulation or the ball. For example,aluminum scrap, magnesium chip, activated carbon, alumina, bauxite Caustic soda, charcoal, clay, coke dust, coal, cryolite, fertilizers, plastics, limestone, pigments, urea, potassium ...