Analysis of the operating performance of the small raw coal pneumatic cleaning equipment applied at Selian No.1 Mine Coal Preparation Plant

Wet cleaning of small coal can lead to difficulty in treatment of coal slime water and low composite calorific value of clean coal. To tackle this problem, a dry cleaning workshop is added at the plant for treating the 25～0 mm small coal with dry cleaning process. Assessment of the operating performance of the process indicates that the percentage of coal brought into refuse is 4.87% with a refuse removal rate of 82%, a heat efficiency of 90%, and the proportion of refuse getting into coal product is rated at 9.98%. Result of field application shows that after introduction of the dry cleaning system, 100 percent of the raw coal produced by Selian No.1 Mine can get treated by Selilan Plant.