PRETREATMENT OF COAL AND FACILITY THEREFOR

PROBLEM TO BE SOLVED: To provide a coal-treating method for production of coke, capable of preventing concentration of tar content and coal powder in circulation gas of a quick heating process, lowering the acidic gas concentration impairing the quality of heated coal and carrying out a heat treatment in a reducing gas atmosphere and facility therefor. SOLUTION: Hot air generated in a hot air generating furnace 2 is blown into a drying classifier 1 to dry coal and the dried crude particles and fine powder are rapidly heated in stream heating towers 8-1 and 8-2 to pyrolyze the crude particles and fine powder and the resultant gas is separated by solid- gas separators 9-1 and 9-2 and the separated gas is circulated through a circulation line 10 into a stream heating tower to carry out a drying treatment of coal for production of coke. A fuel gas is blown from a fuel gas-blowing line 11 into a circulation gas of the circulation line 10 and a part thereof is circulated into the stream heating towers 8-1 and 8-2 and a part thereof is fed to a burner 13 for hot air-generating furnace 2 by a gas feed line 12.