06193176 is referenced by 1 patents and cites 21 patents.

A method of grinding cement clinkers and a cement clinker grinding apparatus having a vertical roller mill are provided. In the method, feed material is ground by a table and rollers. Next, substantially all the resultant ground material is taken out from an underside of the table and then converted to a separator for classifying the ground material by a bucket elevator. The resultant coarse powder provided by the separator is returned to a center of the table. In grinding, an pressing force of each of the rollers onto the table is selected so that a roller pressure per full sectional area of the roller ranges from 10 to 15 kg/cm

2

. Further, a circulation quantity of the coarse powder to be returned to the vertical roller mill is selected from 100 to 300% of the feed material charged into the center of the table. And the liquid of 0.5 to 3% of the feed material to be ground such as water alone or a mixture of water and diethylene glycol is sprayed on the only frictional grinding zone which is positioned outside a position where a relative speed between said table and each of said rollers is equal to zero, in the radial direction of said table. By spraying the liquid on the only frictional grinding zone, the materials are involved firmly between the table and the roller to form the layer of the ground materials, so that the vibration of the roller and table are restrained

Title
Cement clinker grinding method using vertical roller mill and apparatus
Application Number
9/20417
Publication Number
6193176 (B1)
Application Date
February 9, 1998
Publication Date
February 27, 2001
Inventor
Akihiko Takayama
Ofunato
US
Mitsuaki Murata
Kumagaya
US
Kanzaburo Sutoh
Kodama-gun
US
Fuminori Ando
Kobe
US
Hiroshi Ueda
Kobe
US
Seisuke Sawamura
Akashi
US
Yoshihiro Mitsuda
Kakogawa
US
Agent
Oliff & Berridge
US
Assignee
Taiheiyo Cement Corporation
US
Kawasaki Jukogyo Kabushiki Kaisha
US
IPC
B02C 19/12
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