Patents by Inventor Mototatsu Sugizawa

Mototatsu Sugizawa 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 of desulfurizing molten iron
    Patent number: 6379425
    Abstract: Desulfurization is carried out by blowing CaO into molten iron, and a gas mixture of an inert gas and a hydrocarbon gas is used as a carrier. The ratio of the hydrocarbon gas to the desulfurizing agent is maintained in the range of from about 2.0 to about 50 Nl/kg. This desulfurizing method improves the desulfurization efficiency of the desulfurizing agent, increases the productivity of the desulfurizing process, and reduces the amount of slag generated in the desulfurizing process. Alternatively, a desulfurizing flux is blown into the molten iron together with a carrier gas comprising a gas mixture of an inert gas and a hydrocarbon gas or an inert gas alone at the start of desulfurization. The hydrocarbon gas in the carrier gas is increased, is added, or the unit gas is replaced by the hydrocarbon gas at adequate timing, whereby the desulfurization efficiency is improved.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: April 30, 2002
    Assignee: Kawasaki Steel Coporation
    Inventors: Naoki Kikuchi, Shuji Takeuchi, Akiharu Takao, Mototatsu Sugizawa, Shigeru Ogura
  • Method of desulfurizing molten iron alloy
    Patent number: 6328784
    Abstract: A process for desulfurizing a molten iron alloy in which a desulfurizing agent is applied to the molten iron alloy under agitation. Concurrently, a gas containing a hydrocarbon gas is blown onto the bath surface of the molten iron alloy, or a substance generating a hydrocarbon gas is added to the bath surface.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: December 11, 2001
    Assignee: Kawasaki Corporation
    Inventors: Naoki Kikuchi, Shuji Takeuchi, Mototatsu Sugizawa, Shigeru Ogura
  • Molten metal level control method and device for continuous casting
    Patent number: 5311924
    Abstract: A method and apparatus is provided for stabilizing the molten metal surface in a mold. The invention is used to improve the quality of the casting slab by modifying a controlling parameter according to the detected slab drawing speed and the actual nozzle flowing characteristics calculated by the measured molten metal surface level and the nozzle opening degree.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: May 17, 1994
    Assignee: Kawasaki Steel Corporation
    Inventors: Kazuya Asano, Takayuki Kaji, Kazuo Arai, Shuji Tanaka, Michio Ibaraki, Yuki Nabeshima, Hiromitsu Yamanaka, Masaki Takashi, Saburo Moriwaki, Mototatsu Sugizawa, Hiroshi Nomura, Masayuki Onishi