The anthracite produced by Dafeng mine of Rujigou anthracite branch is known as the "king of coal" and the famous "Taixi Coal". In order to fully recover scarce resources, Dafeng coal mine introduced the unique full size dry separation technology of Shenzhou manufacturing group, built a coal preparation plant with a processing capacity of 1.0mt/a, recovered 200-0mm dirty and miscellaneous coal in the mining area, + 80mm raw coal entered the intelligent separation system, and - 80mm raw coal entered the ZM mineral high-efficiency separation system. After separation, the ash content of coal decreased from 50% to less than 28%, creating considerable economic benefits.