About Drum and Rotary Dryers Machines and Their Features During the tumble dryer process, combustion gases are mixed with clean hot air. The wet bulk material is propelled through the system by a stream of hot air. The material is continuously lifted by the cylinder blades.

The ball mill is the key equipment for crushing the material after it is crushed. This type of grinding machine is to put a certain number of steel balls in its barrel as grinding medium. It is widely used in cement, silicate products, new building materials, refractory materials, fertilizers, ferrous and non-ferrous metal beneficiation and glass ceramics and other production industries, dry or wet grinding of various ores and other grindable materials.