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1. 发明专利

JPH04346884A TREATMENT OF FLY ASH 失效
公开(公告)号：JPH04346884A
公开(公告)日：1992-12-02
申请号：JP14942491
申请日：1991-05-24
申请人： KYUSHU ELECTRIC POWER , ONODA CEMENT CO LTD
发明人： INOUE TORU , OGAWA KEIZO , KAMAKURA HIROKI , TAMAE TAKAMIKI , UEHARA TAKASHI , FUJII SATORU
IPC分类号： B02C23/10 , B07B7/083 , B09B5/00 , C04B7/26 , C04B14/02 , C04B18/08
摘要： PURPOSE:To utilize coarse powder of fly ash. CONSTITUTION:Fly ash F is introduced into an air classifier 1 and ground by a pin mill 9 in a dispersion chamber 12. Thereafter this fly ash F is allowed to fall into a classification chamber 11 and classified into fine powder S and coarse powder L. Therefore unburned carbon is made extremely slight in the classified coarse powder L because unburned carbon contained in fly ash becomes fine powder by grinding.

2. 发明专利

JPH04341355A GRINDING METHOD AND APPARATUS THEREFOR 失效
公开(公告)号：JPH04341355A
公开(公告)日：1992-11-27
申请号：JP1709791
申请日：1991-01-17
申请人： ONODA CEMENT CO LTD
发明人： UEHARA TAKASHI , OBANA HIROSHI
IPC分类号： B02C4/02 , B02C13/02 , B02C21/00 , B02C23/12
摘要： PURPOSE:To enhance grinding efficiency by preventing the stop of the whole of a grinding apparatus due to the clogging of a screen being the point at issue of a conventional grinding method and apparatus consisting of a roll machine, a screen and a classifier, and improving non-efficiency returning flakes generated by the grinding of the roll machine to disintegrate the same, and non-efficiency further grinding the fine powder contained in said flakes by the roll machine. CONSTITUTION:The ground product 4 consisting of the fine powder 5 and flakes 6 generated in a roll machine 3 is supplied to a rotary bar screen 7 wherein a large number of obstruction members are provided to a rotary substrate at a predetermined interval to separate the fine powder 5 and the flakes 6 are separated into the fine powder 5 and powder while the powder is allowed to meet with the fine powder 5 to be supplied to a classifier and the classified powder is supplied to the roll machine 3 along with a material to be ground. The apparatus is constituted of the roll machine 3, the rotary bar screen 7 and the classifier.

3. 发明专利

JPH0538468A DISPOSAL METHOD FOR COAL ASH 失效
公开(公告)号：JPH0538468A
公开(公告)日：1993-02-19
申请号：JP22208091
申请日：1991-08-07
申请人： ONODA CEMENT CO LTD
发明人： ASADA MASAYOSHI , TAMAE TAKAMIKI , UEHARA TAKASHI
IPC分类号： B03D1/02 , B03D1/001
摘要： PURPOSE:To separate efficiently unburnt coal content in coal ash. CONSTITUTION:The hydrophobic process and flotation process are carried out in a low pH zone formed by adding a pH adjuster 20 into water slurry of coal ash in the disposal method of coal ash consisting of the hydrophobic process for turning unburnt coal content hydrophobic by adding a collecting agent 22 into water slurry of coal ash and the floatation process in which foams are formed by adding a foaming agent 23 into water slurry, having the unburnt coal content attached to said foams and floating the same.

4. 发明专利

JPH03270740A VERTICAL ROLLER MILL 失效
公开(公告)号：JPH03270740A
公开(公告)日：1991-12-02
申请号：JP6905790
申请日：1990-03-19
申请人： ONODA CEMENT CO LTD
发明人： OBANA HIROSHI , TAMAE TAKAMIKI , UEHARA TAKASHI , SUZUKI YASUYOSHI
IPC分类号： B02C15/04
摘要： PURPOSE:To keep the biting gap between a roller and a table by providing a cone inclined at an angle larger than the angle of repose of a material to be ground to the central part of the table and positioning the base end part of the cone in the vicinity of the head part of the roller. CONSTITUTION:When a material to be ground is supplied to a vertical roller mill M, the material to be ground is guided to a cone 2 to enter a biting gap 10 and ground by the pressing force between a tabel 1 and roller 3 while it receives centrifugal force to move toward the outer periphery 1c of the table 1. The cone 2 is inclined at an angle larger than the angle of repose of the material to be ground and the base end part 2a thereof is positioned in the vicinity of the head part 6b of a tire 6 and the material to be ground is bitten in the gap 10. Since the gap L between the head part 6b of the tire 6 and the inner periphery 1a of the table 1 is larger than the thickness dimension D of a tolerant abrasion part 7 even when the tire 6 is abraded on the side of the bottom part 6a thereof, the head part 6b of the tire 6 does not come into contact with the inner periphery 1a of the table 1.

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