... heat and stable quality.Ball press is widely used in metallurgy, mining, coal, refractory, abrasive, fertilizer, ceramics, etc. Ball press machine ... , high strength, and high hardnessBall press machine working principle:1. Charcoal ball press can press charcoal powder, charcoal dust, coal powder ... Coal ball type pressure machine will pass the power on to the two pressure roller through the reducer. The ...