DE ASHING AND TRANSPORTING COAL

摘要

A method for de-ashing crushed coal and transporting it in the form of pellets, said method comprising the following steps: A. the step of mixing pulverized coal with a binder to cover the surfaces of coal particles with the binder; B. the step of adding water to the pulverized coal; C. the step of stirring the slurry to disperse ash particles in the pulverized coal into water and to agglomerate coal particles in the pulverized coal by tumbling, whereby forming pelletized coal; and D. the step of separating the pelletized coal from the ash particles, and transporting the pelletized coal. The above basic four steps may be combined with the following steps depending on the state and particle size of raw coal: E. the step of crushing raw coal and separating it into high-ash coal and purified crushed coal, and further pulverizing the purified crushed coal and supplying the resulting powder to the above step A; and F. the step of separating by gravity separation the pellets obtained in the above step D into high-ash pellets and purified pellets, and transporting the resulting purified pellets.