Method for classification of coals for coke production

A method for classifying wet coal for coke production comprising:

• supplying the wet coal into a cylindrical screen arranged in a casing, rotating and revolving the screen in an almost vertical position to subject the wet coal to gravity, centrifugal force and vibrating force, blowing a high pressure gas stream against the outer side of the screen, and vertically moving the blowing position of the gas stream to clean the screen, while classification is being performed so as to obtain the under-mesh and over-mesh coal fractions, and removing adhesions on the inner surface of the casing by the force of water supplied to the rotating screen and thrown thereby from the outside of the screen after the supply of wet coal is stopped.