The shaft-less drum screen is mainly used for grading the pellet size of materials and is widely used in power, mining, metallurgy, building materials, chemical industry and other production industries. It is often used for grading refractory materials, coal, fertilizer, sand field stones, and screening of sticky and wet materials such as coal, coke, lime, gold ore...in order to make the product structure more uniform to meet production needs. The maximum size of the screened product is 100mm, the middle size is 10-50mm, and the finest size can reach less than 3mm.