Patents by Inventor Kiyoharu Ito

Kiyoharu Ito 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 and apparatus for removing deposit in non-ferrous smelting furnace
    Patent number: 5980816
    Abstract: A method of removing furnace deposit in a non-ferrous smelting furnace, comprising the steps of inserting a lance 2 provided with a spray nozzle 4 at the tip thereof from a furnace ceiling into a furnace; spraying a reducing agent from the spray nozzle 4 at the tip of the lance toward a molten deposit mainly comprising oxides adhering to a furnace wall surface of a non-ferrous smelting furnace by turning the lance within a prescribed angular range and vertically moving the lance within a prescribed range; reducing the molten deposit into a low-melting-point slag; causing the slag to flow; and discharging the slag together with furnace slag to outside the furnace.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: November 9, 1999
    Assignee: Nippon Mining and Metals Co., Ltd.
    Inventors: Chikashi Suenaga, Manabu Tanaka, Yutaka Yasuda, Kiyoharu Ito, Yasuto Katayama