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The adhesion mechanics of coal and the behavior of the coal adhesion to the hopper are analyzed. A model coal hopper is developed, and the model experiments are made by using the surface electro-osmosis technology according to the processing conditions. The parameters of the surface electro-osmosis technology are optimized by the method of orthogonal polynomial regression designing. The result shows that the surface electro-osmosis technique is one of the good methods to solve the adhering problem of coal to the coal hopper in transfer piping.