To provide a vertical mill achieving the enhancement of classification efficiency by increasing the flow velocity of the primary air rising through a classification chamber while revolving to increase the centrifugal force acting on an object to be ground.
The vertical mill includes a housing 2, which is constituted of a cylindrical grinding part 3, a truncated cone-shaped speed increasing part 4 upwardly extending from the upper end of the grinding part to upwardly reduce in diameter and a rectification part 5 upwardly extending from the upper end of the cone-shaped speed increasing part 4, and which forms a classification chamber 12; a classifier 21 provided to the rectification part; a grinding table 7 provided to the lower part of the grinding part; and pressure rollers 9 pressed to the grinding table and grinding a lumpy substance, wherein primary air is ejected from the periphery of the grinding table so as to revolve in the classification chamber.
OHASHI SATOSHI
YAMAZAKI SHUSAKU
YAMANE YOSHIYUKI
| JP2005113125A | 2005-04-28 | |||
| JPS6283052A | 1987-04-16 | |||
| JPH0322539U | 1991-03-08 | |||
| JPH03193142A | 1991-08-22 |