Patents by Inventor Takaya Kitajima

Takaya Kitajima 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).

  • Method for producing reduced iron
    Patent number: 6602320
    Abstract: A method for producing reduced iron comprises agglomerating a raw material mixture containing a carbonaceous reducing agent and an iron oxide-containing material into small agglomerates, heating the agglomerate within a heat reduction furnace, thereby solid reducing the iron oxide in the agglomerate to produce solid reduced iron, or further heating the solid reduced iron, melting the metallic iron produced by the reduction, and coagulating the molten metallic iron while separating the slag component contained in the small agglomerates to provide granular metallic iron, which is characterized by using a agglomerate having a particle size of 10 mm or less or 3-7 mm, preferably less than 6 mm, more preferably 3 mm or more and less than 6 mm as the small agglomerates.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: August 5, 2003
    Assignees: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Midrex International B.V.
    Inventors: Kojiro Fuji, Hidetoshi Tanaka, Shoichi Kikuchi, Takaya Kitajima, Osamu Tsuchiya
  • Method for producing reduced iron
    Publication number: 20010037703
    Abstract: A method for producing reduced iron comprises agglomerating a raw material mixture containing a carbonaceous reducing agent and an iron oxide-containing material into small agglomerates, heating the agglomerate within a heat reduction furnace, thereby solid reducing the iron oxide in the agglomerate to produce solid reduced iron, or further heating the solid reduced iron, melting the metallic iron produced by the reduction, and coagulating the molten metallic iron while separating the slag component contained in the small agglomerates to provide granular metallic iron, which is characterized by using a agglomerate having a particle size of 10 mm or less or 3-7 mm, preferably less than 6 mm, more preferably 3 mm or more and less than 6 mm as the small agglomerates.
    Type: Application
    Filed: April 10, 2001
    Publication date: November 8, 2001
    Applicant: K. K. Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Kojiro Fuji, Hidetoshi Tanaka, Shoichi Kikuchi, Takaya Kitajima, Osamu Tsuchiya