Patents by Inventor Hitoshi DONOMAE

Hitoshi DONOMAE 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 supplying hydrogen-containing reducing gas to shaft part of blast furnace
    Patent number: 10961596
    Abstract: The present invention provides a novel method for supplying a reducing gas to the shaft part of a blast furnace with which a large amount of reducing gas containing hydrogen at a high concentration can be supplied to a deeper position in the blast furnace (location of the blast furnace closer to the center axis in the radial direction) and with which it is possible to reduce the total generated amount of CO2 of the CO2 amount that is reduced by conducting hydrogen smelting in the blast furnace and the CO2 amount that is generated during production of the reducing gas supplied to the blast furnace. The method for supplying a reducing gas to the shaft part of a blast furnace according to the present invention is characterized by reforming coke oven gas by increasing the temperature thereof to 1200 to 1800° C.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: March 30, 2021
    Assignees: NIPPON STEEL CORPORATION, JFE STEEL CORPORATION, KOBE STEEL, LTD., NISSHIN STEEL CO., LTD., NIPPON STEEL ENGINEERING CO., LTD.
    Inventors: Nobuaki Ito, Hitoshi Donomae, Kimihito Suzuki, Kenji Nakao, Toshio Isohara
  • METHOD FOR SUPPLYING HYDROGEN-CONTAINING REDUCING GAS TO SHAFT PART OF BLAST FURNACE
    Publication number: 20190032160
    Abstract: The present invention provides a novel method for supplying a reducing gas to the shaft part of a blast furnace with which a large amount of reducing gas containing hydrogen at a high concentration can be supplied to a deeper position in the blast furnace (location of the blast furnace closer to the center axis in the radial direction) and with which it is possible to reduce the total generated amount of CO2 of the CO2 amount that is reduced by conducting hydrogen smelting in the blast furnace and the CO2 amount that is generated during production of the reducing gas supplied to the blast furnace. The method for supplying a reducing gas to the shaft part of a blast furnace according to the present invention is characterized by reforming coke oven gas by increasing the temperature thereof to 1200 to 1800° C.
    Type: Application
    Filed: February 5, 2016
    Publication date: January 31, 2019
    Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION, JFE STEEL CORPORATION, KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), NISSHIN STEEL CO., LTD., NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
    Inventors: Nobuaki ITO, Hitoshi DONOMAE, Kimihito SUZUKI, Kenji NAKAO, Toshio ISOHARA