Patents by Inventor Mitsuaki Murata

Mitsuaki Murata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6193176
    Abstract: 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/cm2. 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.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: February 27, 2001
    Assignees: Kawasaki Jukogyo Kabushiki Kaisha, Taiheiyo Cement Corporation
    Inventors: Yoshihiro Mitsuda, Seisuke Sawamura, Hiroshi Ueda, Fuminori Ando, Kanzaburo Sutoh, Mitsuaki Murata, Akihiko Takayama
  • Patent number: 6019299
    Abstract: The grinding efficiency can be improved by use of a vertical roller mill, while reducing the energy consumption and improving the product quality. The disclosed cement clinker grinding apparatus comprises a closed circuit for conveying the ground material from the vertical roller mill (21) to the external separator (28) by the bucket elevator (29), for classifying the conveyed material into coarse powder and fine powder, and further for returning the classified coarse powder into the vertical roller mill (21). That is, a part of the ground material conveyed by the bucket elevator (29) is divided by the distributing damper (32) and then directly returned to the vertical roller mill (21). Since the ground material are not conveyed by air flow conveyance (i.e., air sweep), it is possible to prevent an increase of power consumption of the suction fan (31).
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: February 1, 2000
    Assignees: Kawasaki Jukogyo Kabushiki Kaisha, Taiheiyo Cement Corp.
    Inventors: Yoshihiro Mitsuda, Seisuke Sawamura, Hiroshi Ueda, Fuminori Ando, Kanzaburo Sutoh, Mitsuaki Murata, Akihiko Takayama
  • Patent number: 6017213
    Abstract: A probe having a double-tubed structure is provided to communicate with a kiln exhaust gas flowing path. A part of kiln exhaust gas is extracted through an inner tube of the probe, while cooling gas is supplied to a fluid flowing path formed between the inner tube and an outer tube of the probe. The cooling gas is guided to flow into an inner area of a front end portion of the inner tube so as to form a mixing and quick cooling area at a front end portion of the probe, thereby rapidly cooling the extracted gas.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: January 25, 2000
    Assignee: Taiheivo Cement Corporation
    Inventors: Mitsuaki Murata, Hiuma Kaneko, Naoki Ueno
  • Patent number: 5975309
    Abstract: A fluidized-bed classifier has a vessel defining a space divided into an upper fluidized-bed chamber and a lower gas chamber by a perforated dispersion plate having the shape of a funnel. Rising currents of a gas, such as air, are blown through the dispersion plate into the upper fluidized-bed chamber to produce a fluidized bed of a particulate material over the dispersion plate. The lower gas chamber is divided into a first gas chamber and a second gas chamber by a partition plate. The gas is supplied into the first air chamber so that rising gas currents of a velocity necessary for fluidizing coarse particles contained in the particulate material fed into the vessel are blown from the first air chamber through the dispersion plate into the fluidized-bed chamber.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: November 2, 1999
    Assignees: Kawasaki Jukogyo Kabushiki Kaisha, Taiheiyo Cement Corporation
    Inventors: Yoshihiro Mitsuda, Seisuke Sawamura, Ryuichi Okamura, Hiroshi Ueda, Fuminori Ando, Kanzaburo Sutoh, Mitsuaki Murata, Tsutomu Hirobe
  • Patent number: 5937771
    Abstract: In the processing of exhaust gases by a chlorine bypass system, a portion of kiln exhaust gases G is extracted from a kiln 1, after the extracted exhaust gases G are instantly cooled to 600.degree. C. to 700.degree. C. or less, the dust W in the cooled exhaust gases is separated to rough powder and fine powder by a separator, the separated rough powder is returned to the kiln 1 and the separated fine powder is discharged to a cement system, wherein extracting means extracts the kiln exhaust gases at the ratio more than 0% to equal to or less than 5% and the separating point of the separator is set to 5 .mu.m to 7 .mu.m.
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: August 17, 1999
    Assignee: Taiheiyo Cement Corporation
    Inventors: Kanzaburo Sutoh, Mitsuaki Murata, Naoki Ueno
  • Patent number: 5895213
    Abstract: A clinker cooler (3) comprises a plurality of grates (5) arranged in adjacent and overlapping relation to each other for conveying hot cement clinker (11) supplied from a kiln (1). The grate (5) is formed with an air hole (20) through which air from a fan (8) is jetted toward the cement clinker via a compartment (16) to cool the cement clinker. A distribution chamber (13) is equipped to a part of the grate corresponding to a part of cement clinker which is not cooled sufficiently, and the air from the fan (14) is jetted to such part of cement clinker which is not cooled sufficiently. The quantity of air jetted from the distribution chamber is adjusted by varying a degree of opening of a damper (15).
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: April 20, 1999
    Assignees: Chichibu Onoda Cement Corp., Babcock Hitachi Kabushiki Kaisha
    Inventors: Kanzaburo Sutoh, Mitsuaki Murata, Akira Mochizuki, Koji Wakasa, Kazuto Fujiwara, Taro Kaetsu
  • Patent number: 5529248
    Abstract: A grinding apparatus includes a roller mill in which material particles are pre-ground, a tube mill connected to the roller mill through a fluidized-bed-type classifying device in which the material particles are classified by size and a circulation line is connected between the classifying device and the roller mill, wherein a fluidized portion of the pre-ground particles, which consists of a fine material component is fed into a tube mill, a remaining portion of the pre-ground particles, which consists of course material and some amount of fine material not fed into the tube mill is returned to the roller mill through the circulation line where the remaining portion of the pre-ground particles is again crushed together with newly fed material particles in the roller mill.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: June 25, 1996
    Assignees: Kawasaki Jukogyo Kabushiki Kaisha, Chichibu Cement Co., Ltd.
    Inventors: Seisuke Sawamura, Hiroshi Ueda, Kanzaburo Sutou, Mitsuaki Murata