... , mining, coal, refractory, abrasive, fertilizer, ceramics, etc. Ball press machine feature:1. High efficiency2. Apply for many kinds of ... density, high strength, and high hardnessBall press machine working principle:1. Charcoal ball press can press charcoal powder, charcoal dust, coal ... machine will pass the power on to the two pressure roller through the reducer. The two sides and roll rotation, ...