Rotary kiln capable of screening off powder

The utility model discloses a rotary kiln capable of screening off powder. The rotary kiln comprises a screening section and a roasting section, wherein the screening section comprises an inner cylinder and an outer cylinder; the wall of the inner cylinder consists of arc-shaped plates with screening holes; the arc-shaped plates are fixed by brackets in a support manner; guide spirals are formed in the inner wall of the outer cylinder. Due to adoption of the rotary kiln, pellets and powder which are dried and preheated inside the rotary kiln can be effectively separated, the powder and the pellets can be also discharged out from different outlets, the powder is prevented from entering the high-temperature section inside the rotary kiln, the ring period of the rotary kiln is greatly retarded, the production efficiency of a grate-rotary kiln system is improved, the content of powder entering a pellet cooling system is also greatly reduced, and the cooling efficiency and the later screening effect can be improved.