Patents by Inventor Fumito Tanaka

Fumito Tanaka 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: 9447479
    Abstract: A method of treating recyclable raw materials containing valuable metals is provided, the method including the steps of feeding recyclable raw materials (W) containing valuable metals into a rotary kiln furnace (2) in which a refractory product having an Al2O3—Cr2O3 content of 70% or greater is used for an inner wall; feeding an additive (A) containing SiO2 as a major component into the rotary kiln furnace (2) so as to increase a viscosity of a slag (S) flowing along the inner wall, thereby the recyclable raw materials (W) are attached on the slag (S) having a high viscosity such that at least part of the recyclable raw materials (W) is exposed to the inside of the rotary kiln furnace; and burning/melting the recyclable raw materials (W) attached on the slag (S) in the rotary kiln furnace (2).
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: September 20, 2016
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Nobuhiro Oguma, Fumito Tanaka
  • Publication number: 20150337409
    Abstract: A method of treating recyclable raw materials containing valuable metals is provided, the method including the steps of feeding recyclable raw materials (W) containing valuable metals into a rotary kiln furnace (2) in which a refractory product having an Al2O3—Cr2O3 content of 70% or greater is used for an inner wall; feeding an additive (A) containing SiO2 as a major component into the rotary kiln furnace (2) so as to increase a viscosity of a slag (S) flowing along the inner wall, thereby the recyclable raw materials (W) are attached on the slag (S) having a high viscosity such that at least part of the recyclable raw materials (W) is exposed to the inside of the rotary kiln furnace; and burning/melting the recyclable raw materials (W) attached on the slag (S) in the rotary kiln furnace (2).
    Type: Application
    Filed: October 10, 2013
    Publication date: November 26, 2015
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Nobuhiro Oguma, Fumito Tanaka
  • Patent number: 6574263
    Abstract: A method, for charging anode(s) into a furnace, comprises bending anode(s) having a roughly rectangular plate shape at the end of the charging direction, and charging the anode(s) into a melt stored in the furnace through a slope. When the depth of melt is taken to be D (cm), the height of the slope is taken to be H (cm), the inclination angle of the slope is taken to be &bgr; (°) and the thickness of the anode is taken to be b (cm), the bending angle &agr; (°) of the anode and the length c (cm) of the bent end of the anode are set to satisfy the following relationship: Equation (1): D>A×(c sin &agr;/b)B +0.06(H-190), provided that A and B are given by: Equation (2): A=−1051(sin &bgr;)2 +2028 sin &bgr;−839.3, and Equation (3): B=7.378(sin &bgr;)2−11.64 sin &bgr;+3.806.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: June 3, 2003
    Assignee: Mitsubishi Materials Corporation
    Inventors: Osamu Iida, Fumito Tanaka
  • Patent number: 6239051
    Abstract: The present invention provides a magnesia-spinel refractory in which corrosion resistance and slag penetration resistance are significantly improved. The magnesia-spinel refractory is obtained by mixing magnesia granulated powder having a particle diameter of 10 to 150 &mgr;m and alumina powder having a particle diameter of 0.1 to 5 &mgr;m, molding the resultant mixture, and then burning the molded product to form a dense and strong combined structure of periclase and spinel. The mixture of magnesia and alumina contains powders of both components, or a powder of one of the components and a granulated powder of the other component. It is preferable to use a spray dryer method as granulating means, and a hydrostatic pressing method as molding means. These mixtures are used for producing magnesia-spinel protecting tube and crucible, bricks for copper smelting and converting furnaces, and magnesia-spinel protecting tube and crucible for copper smelting and converting furnace slag.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: May 29, 2001
    Assignee: Mitsubishi Materials Corporation
    Inventors: Fumito Tanaka, Hideya Sato, Susumu Okabe, Masaharu Yamada