Patents by Inventor Moritoshi MIZUTANI

Moritoshi MIZUTANI 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
    Publication number: 20230167517
    Abstract: A method for producing reduced iron that produces reduced iron by reducing iron oxide charged in a shaft furnace, in which a heated gas mixture which contains a reducing gas and a nitrogen gas, the reducing gas containing 90 volume % or more of a hydrogen gas, is blown into the shaft furnace from a tuyere equipped at a lower portion of a reduction zone of the shaft furnace, at least part of the reducing gas is blown into a cooling zone of the reduced iron provided at a lower portion of the shaft furnace at normal temperature, and the reducing gas that has flowed up in the cooling zone is used for reduction of the iron oxide.
    Type: Application
    Filed: May 14, 2021
    Publication date: June 1, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Takanobu INADA, Moritoshi MIZUTANI, Yutaka UJISAWA, Naoto YASUDA, Hitoshi FUNAGANE
  • METHOD FOR PRODUCING REDUCED IRON
    Publication number: 20230167516
    Abstract: A method for producing reduced iron that produces reduced iron by reducing iron oxide charged in a shaft furnace, in which a gas mixture which contains a reducing gas and a nitrogen gas, and has a predetermined temperature, is blown into the shaft furnace. The reducing gas contains 90 volume% or more of a hydrogen gas.
    Type: Application
    Filed: May 13, 2021
    Publication date: June 1, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Takanobu INADA, Moritoshi MIZUTANI, Yutaka UJISAWA
  • Raw material for direct reduction, method of producing raw material for direct reduction, and method of producing reduced iron
    Patent number: 11198914
    Abstract: A raw material for direct reduction which is reduced in a shaft furnace includes a raw material, and a coating layer which coats the raw material and has a porosity of 20 volume % or more.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: December 14, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Moritoshi Mizutani, Tsunehisa Nishimura
  • RAW MATERIAL FOR DIRECT REDUCTION, METHOD OF PRODUCING RAW MATERIAL FOR DIRECT REDUCTION, AND METHOD OF PRODUCING REDUCED IRON
    Publication number: 20200224285
    Abstract: A raw material for direct reduction which is reduced in a shaft furnace includes a raw material, and a coating layer which coats the raw material and has a porosity of 20 volume % or more.
    Type: Application
    Filed: March 30, 2020
    Publication date: July 16, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Moritoshi MIZUTANI, Tsunehisa NISHIMURA
  • RAW MATERIAL FOR DIRECT REDUCTION, METHOD OF PRODUCING RAW MATERIAL FOR DIRECT REDUCTION, AND METHOD OF PRODUCING REDUCED IRON
    Publication number: 20160153061
    Abstract: A raw material for direct reduction which is reduced in a shaft furnace includes a raw material, and a coating layer which coats the raw material and has a porosity of 20 volume % or more.
    Type: Application
    Filed: July 25, 2014
    Publication date: June 2, 2016
    Inventors: Moritoshi MIZUTANI, Tsunehisa NISHIMURA