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.