The rotary kilns are divided into two main categories: externally heated (SYHW) and internally heated (SYHN) types. They are primarily used for calcining and drying materials such as catalysts, molecular sieves, chemical powder materials, activated carbon, battery materials, abrasives, welding agents, and rare earth materials, featuring high production efficiency and automation. Based on the properties and requirements of different materials, feeding systems, discharge systems, cooling systems, and dust removal systems can be equipped for the rotary kilns.