... in metallurgy, mining, coal, refractory, abrasive, fertilizer, ceramics, etc. Ball press machine feature:1. High efficiency2. Apply ... high hardnessBall press machine working principle:1. Charcoal ball press can press charcoal powder, charcoal dust, coal ... Egg-shaped ball, oval-shaped ball, circular-shaped ball, square-shaped ball, columnar-shaped ball, banding-shape ball, cake-shaped ball, etcTechnical ...