Patents by Inventor Jean A. Michard

Jean A. Michard 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 operating a blast furnace with plasma heating
    Patent number: 4707183
    Abstract: A blast furnace, especially for the production of hot metal for the steel industry and operated with a normal charge above the tuyere blast zone, has its hot metal production increased at least temporarily by a lateral injection of metal oxides into the zone. A supply of the thermal energy requirements for the smelting reduction of these metal oxides by electrically operated plasma torches, and the compensation of a overoxygenation resulting from the oxygen contribution of these metal oxides by the introduction of nitrogen.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: November 17, 1987
    Assignee: Institut de Recherches de la Siderurgie Francaise (Irsid)
    Inventors: Jean A. Michard, Lucien De Saint-Martin