Abstract: In order to tackle the problem of high medium consumption, technical transformation work is made by the plant based on analysis of the coal washing processes and equipment currently applied. The items renovated include, among others, relocation and addition of medium sumps, cyclone overflow box, medium draining screen′s feed chute and water spray system, spray system of magnetic separator, and desliming screen. Through renovation, the medium consumption has seen a drastic drop from originally 0.75 kg/t to the present 0.52 kg/t; making it possible for the plant to reduce the cost by 960 000 yuan a year.