Patents by Inventor Mitsumasa Hoshi

Mitsumasa Hoshi 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).

  • Copper smelting method
    Patent number: 8382879
    Abstract: A copper smelting method includes: supplying an oxygen-enriched gas, a solvent, and a copper concentrate into a furnace, while not supplying a coke material; and supplying pig iron to slag that is generated in the furnace.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: February 26, 2013
    Assignee: Pan Pacific Copper Co., Ltd.
    Inventors: Tatsuya Motomura, Yoshiaki Suzuki, Masaharu Takahashi, Mitsumasa Hoshi
  • COPPER SMELTING METHOD
    Publication number: 20090293678
    Abstract: A copper smelting method includes: supplying an oxygen-enriched gas, a solvent, and a copper concentrate into a furnace, while not supplying a coke material; and supplying pig iron to slag that is generated in the furnace.
    Type: Application
    Filed: April 29, 2009
    Publication date: December 3, 2009
    Inventors: Tatsuya MOTOMURA, Yoshiaki SUZUKI, Masaharu TAKAHASHI, Mitsumasa HOSHI
  • Method of operating a copper smelting furnace
    Patent number: 6436169
    Abstract: In a method of operating a copper smelting furnace, wherein a ferrous substance containing more than 80 wt. % metallic iron having a specific gravity of 3.0-8.0 and particle diameter of 0.3-15 mm is added to copper smelting slag containing Fe having an oxidation-reduction number of 3+ and to the Fe3O4 in the intermediate layer, thereby deoxidizing the Fe3O4 to FeO, the method reduces the Fe3O4 within the slag layer and the Fe3O4 generated in the intermediate layer between the slag layer and the matte layer. So that their viscosity is reduced and separation rate is increased, thus increasing the yield rate of useful metal, and the problems that originate in the intermediate layer are eliminated.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: August 20, 2002
    Assignee: Nippon Mining & Metals Co., Ltd.
    Inventors: Yushiro Hirai, Mitsumasa Hoshi
  • Method of operating a copper smelting furnace
    Publication number: 20010049982
    Abstract: In a method of operating a copper smelting furnace, wherein a ferrous substance containing more than 80 wt. % metallic iron having a specific gravity of 3.0-8.0 and particle diameter of 0.3-15 mm is added to copper smelting slag containing Fe having an oxidation-reduction number of 3+ and to the Fe3O4 in the intermediate layer, thereby deoxidizing the Fe3O4 to FeO, the method reduces the Fe3O4 within the slag layer and the Fe3O4 generated in the intermediate layer between the slag layer and the matte layer. So that their viscosity is reduced and separation rate is increased, thus increasing the yield rate of useful metal, and the problems that originate in the intermediate layer are eliminated.
    Type: Application
    Filed: March 5, 2001
    Publication date: December 13, 2001
    Inventors: Yushiro Hirai, Mitsumasa Hoshi