A PROCESS FOR PRODUCING UPGRADED FUEL OR COAL OF HIGH ENERGY DENSITY FROM LUMPY BROWN COAL

摘要

A process for producing from lumpy brown coal of high water content an upgraded product of high energy content characterised in that the raw brown coal having a particle size of more than 3 mm is in a first stage partially dewatered by a discontinuous treatment with saturated steam in one or more autoclaves, and in that subsequently the coal is dried in a second stage with steam having a temperature higher than 300 DEG C. Preferably coal introduced into the second stage is comminuted to a particle size of not more than 10 mm.