The TQSF series specific gravity stone removal machine is a commonly used energy-saving grading stone selection equipment developed and produced by our company. It has the function of removing a large amount of stones from materials and is currently an ideal stone removal and impurity removal equipment for cleaning processes in domestic grain, chemical, feed, alcohol, and pharmaceutical factories. The equipment utilizes the different physical properties of the specific gravity and suspension velocity of grain and shoulder stones to promote the classification of grain and shoulder stones through the air flow passing through the gaps between grain particles. The shoulder stones are of equal weight and impurities in the lower layer, and under the action of the inclined and reciprocating stone removal sieve plate, they move towards the stone discharge end. The grain floating on the upper layer flows towards the discharge end under its own weight, thereby separating the shoulder stones from the grain.