Application of the heavy-medium slime washing process for separation of anthracite at No.2 Mine Coal Preparation Plant

For attaining effective cleaning of coarse slime, reduction of content of tailings in clean product and improved comprehensive economic performance, a comparative analysis is made of several commonly used coarse slime cleaning methods.Based on the result of analysis and in line with the property of the coal treated and the cleaning processes applied by the plant, the heavy-medium slime separation process in finally selected.The co-authors present a detailed analysis of the process flowsheet, make-up and the practical result obtained in field application of the process.Practice shows that application of the process can lead to effective recovery of the coarse slime which used to enter the heavy-medium separation system due to insufficiency in dry extraction of coal fines, increase of clean coal yield by 1.9 percentage points.