Abstract: The plant was found to operate with a considerably high medium consumption at its early commissioning stage. Following an investigation into the technical management,plant design principle and process equipment selection aspects,an analysis is made of the factors causing the high consumption of medium. Based on result of analysis,measures are taken for optimization of coal washing systems and operation management. The optimization work has led to effective control of medium consumption,reduction of operating cost and improvement of economic result,providing,therefore,a solid foundation for allowing the plant to operate in a stable,highly efficient and energy-saving manner.