When raw material is fed into the drum, it is rotated and tumbled by the rotating drum. The material continuously moves along the drum, with finer particles passing through the screen holes and being discharged through the material chute, while larger particles continue to move forward until discharged from the rear of the drum screen. Widely used for grading and washing materials such as stones, sand, coal, chemicals, and minerals in industries like stone processing, sand and gravel, coal preparation, chemical, and mineral processing.