0858839-A1 is referenced by 1 patents and cites 8 patents.

A method of grinding cement clinkers and a cement clinker grinding apparatus having a vertical roller mill (11) are provided. In the method, feed material is ground by a table (13) and rollers (16). Next, substantially all the resultant ground material is taken out from an underside of the table and then conveyed to a separator (37) for classifying the ground material by a bucket elevator (38). The resultant coarse powder (46) 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. 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 (Z2) 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 (Z2), the materials are involved firmly between the table (13) and the roller (16) 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 thereof
Application Number
EP19980102375 19980211
Publication Number
0858839 (A1)
Application Date
February 11, 1998
Publication Date
August 19, 1998
Inventor
Takayama Akihiko
JP
Murata Mitsuaki
JP
Sutoh Kanzaburo
JP
Ando Fuminori
JP
Ueda Hiroshi
JP
Sawamura Seisuke
JP
Mitsuda Yoshihiro
JP
Assignee
Chichibu Onoda Cement
JP
Kawasaki Heavy
JP
IPC
B02C 23/18
B02C 23/12
B02C 15/00
B02C 23/18
B02C 23/00
B02C 15/00
B02C 23/18
B02C 23/12
B02C 15/04
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