Silicon carbide micro-powder purifying and grading device

The utility model belongs to the technical field of micro-powder purification, and particularly relates to a silicon carbide micro-powder purification and grading device which comprises a purification device body and a fixed base, a plurality of hollow rods are fixedly arranged at the top of the fixed base, sliding rods are movably arranged in the hollow rods, the tops of the sliding rods are fixedly provided with the same working platform, and the same working platform is arranged on the top of the fixed base. An inner groove is formed in the top of the fixed base, sliding grooves are formed in the inner walls of the two sides of the inner groove, and sliding blocks are movably installed in the sliding grooves. By arranging the installation sleeve, the telescopic column, the limiting strip, the clamping block, the hinge seat, the lock frame, the ejector rod and other components, the telescopic rod can be driven when the working platform ascends. The telescopic rod drives the clamping block, the clamping bloc