VERTICAL TYPE MILL AND CHARCOAL BURNING BOILER FACILITY PROVIDED WITH THE SAME

PROBLEM TO BE SOLVED: To provide a vertical type mill capable of performing stable execution even when increase of an amount of air is suppressed. SOLUTION: The vertical type mill is provided with a crushing part 5 having a throat 4 for introducing air on an outer peripheral part; and a classification part 8 provided above the crushing part 5. In the vertical type mill, the powder crushed by the crushing part 5 is conveyed to the classification part 8 by air 18 from the throat 4, the coarse particle classified by the classification part 5 is returned and re-crushed in the crushing part 5 and the fine particle classified by the classification part 5 is discharged to the outside of the system. A re-circulation system 27 for extracting a part of the air 18 from a rear flow side of the crushing part 5 and re-circulating the extracted air to an upstream side of the throat 4 is provided. COPYRIGHT: (C)2006,JPO&NCIPI