A process for producing a coal-water slurry having a low viscosity and a good stability even in a high coal concentration without increase in the production cost is provided, which process is characterized in that when coal is fed to a wet mill and milled therein, the coal feed is divided in a multi-stage...http://www.google.es/patents/US4747548?utm_source=gb-gplus-sharePatente US4747548 - Process for producing a high concentration coal-water slurry
Process for producing a high concentration coal-water slurry
