Method for processing raw coal

摘要

A method and apparatus for beneficiating crushed raw coal comprising: cleaning the crushed coal in bulk in cyclone separators using only water as a cleaning medium and obtaining a product of wet clean coal and wet reject material and also a stream of effluent; drying said wet clean coal and wet reject material by agglomerating after the addition of a small amount of oil and then centrifuging to obtain a product of clean dry coal and solid reject material and also a stream of effluent; treating the effluent stream from the cleaning step and the effluent stream from the drying step by means of flocculation to recover a product of coal and reject sludge which is returned to pass through the drying step again; and thus obtain clean water which is recycled and applied to the input of the cyclones in the cleaning step.