... coal, refractory, abrasive, fertilizer, ceramics, etc. Ball press machine feature:1. High efficiency2. Apply for many kinds of powder like charcoal, coal ... density, high strength, and high hardnessBall press machine working principle:1. Charcoal ball press can press charcoal powder, charcoal dust, coal powder ... -3T3603607.54-6T430430156-8 ball shape Double-roll type press machine for charcoal powder