... powder to ball. Ball press is a widely used in many range, this machine can press the raw materials ... active carbon, aluminum oxide, bauxite, causticity sodium, charcoal, clay ,braize ,coal, cryolite, chemical fertilizer, plastic, lime stone, pigment, urea, etc. ... type: 4 rollers double mechanical pressFeed materials: coal dust, coke powder, ferrous and non-ferrous metal powder, ferric oxide sheet, ...