Abstract: In view of the backwardness of coarse coal separation process, considerably high loss of coal in refuse and inability to effect closed washwater circulation circuit, Lingxin Coal Preparation Plant switches to the use of the TDS 24-30S intelligent dry cleaning machine to separate coarse coal instead of the Jigging system originally used. Practice shows the use of the intelligent dry cleaning machine has led to save of electric power by 781 440 kW·h, a reduction of water consumption by 30 000 m³, an increase of clean coal yield by 4 100 tons, and a sustantial improvement of overall productivity efficiency, creating therefore a remarkable economic and social benefit.