Title:
VERTICAL-TYPE MILL
Document Type and Number:
WIPO Patent Application WO/2013/141303
Kind Code:
A1
Abstract:
Provided is a vertical-type mill whereby abrasion of a hopper and accumulation of coarse particles in the hopper can both be prevented. A vertical-type mill provided with a milling mechanism for milling a material to be milled and obtaining solid particles by meshing of a milling roller or milling ball and a milling table, a classification mechanism having a classifier for classifying milled solid particles and a hopper (11) for collecting coarse particles that are classified by the classifier and dropped downward and leading the coarse particles toward the milling mechanism, a raw material feeding pipe (1) for charging the material to be milled into the milling table, and housings (43a, b), wherein the raw material feeding pipe is provided in the hopper so that the relationship 0.15 ≤ L'/L ≤ 0.5 is satisfied, where, using the boundary line between a cylindrical part of the hopper and an inverted conical part of the hopper as a reference position, L is the distance from the reference position to the top end of the hopper, and L' is the distance from the reference position to the bottom end (1a) of the raw material feeding pipe.
Inventors:
AIZAWA TAKASHI (JP)
AOYAMA TAKEHIRO (JP)
HAMANAKA FUMIYA (JP)
AOYAMA TAKEHIRO (JP)
HAMANAKA FUMIYA (JP)
Application Number:
PCT/JP2013/058091
Publication Date:
September 26, 2013
Filing Date:
March 21, 2013
Export Citation:
Assignee:
BABCOCK HITACHI KK (JP)
International Classes:
B02C15/04; B02C23/02
Foreign References:
| JP2007117903A | 2007-05-17 | |||
| JPS62204861A | 1987-09-09 | |||
| JPS58180242A | 1983-10-21 |
Attorney, Agent or Firm:
The Patent Body Corporate TAKEWA INTERNATIONAL PATENT OFFICE (JP)
Patent business corporation Takekazu international patent firm (JP)
Patent business corporation Takekazu international patent firm (JP)
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