Airflow type raw material screening and grading device for silicon carbide ceramic preparation

An airflow type raw material screening and grading device for silicon carbide ceramic preparation relates to the technical field of airflow screening and comprises a first supporting plate and a second supporting plate which are parallel to each other, a raw material screening barrel is arranged between the first supporting plate and the second supporting plate, a horizontal cover plate is fixedly connected to an opening in the upper portion of the raw material screening barrel, and a rotary screening assembly is arranged in the raw material screening barrel; a feeding pipe is fixedly connected to the inner side wall of the second supporting plate, a spiral feeding assembly is arranged in the feeding pipe, and a feeding hopper is fixedly connected to the upper portion of the feeding pipe. An annular air bellow is fixedly connected between the outer circumferential wall of the feeding pipe and the inner circumferential wall of the raw material screening barrel. Symmetrical air compressors are fixedly connected