Press ball machines can be divided into two categories according to the type of material: dry powder ball press and wet powder ball press. The dry powder ball press only relies on the forming pressure of the ball press to press the pellets without adding a binder for physical forming, and the materials are relatively relative. In other words, the water content is low, and the properties of pellets remain unchanged after molding. It is mainly used to compress powdery materials that are difficult to form and have too little moisture, such as: quicklime powder, magnesium oxide powder, copper powder, chrome ore powder, lead-zinc waste, bauxite, non-ferrous metal powder, refractory, ceramics etc. Its purpose is to reduce dust, control bulk density, return to use, and improve transportation characteristics. It is widely used in metallurgy, chemical, refractory and other industries. The main features are high molding pressure, adjustable host rotation speed, and screw feeding device. Dry powder ball press can be used to press iron powder, aluminum powder, iron oxide scale, carbon powder, slag, gypsum, tailings, sludge, kaolin, activated carbon, coke powder and other powder, powder, waste, waste finished ball shape .