Used for powder material in pre-clean, effectively crushed powder agglomeration, separation of stones mixed, the machine can also be used to mix materials sifter, clearing away from the shape. With high yield, good cleaning effect, small power consumption, simple structure, small size, and other characteristics. Device to open the access door is convenient for daily maintenance, overhaul and sieve tube replacement. According to the material nature matching suitable sieve, to achieve the best effect.