Patents by Inventor Horstmar Mohnkern

Horstmar Mohnkern 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).

  • Patent number: 5772727
    Abstract: A process of producing metal from a metal ore containing metal oxides includes the steps of: obtaining a reducing gas containing at least one of carbon and hydrogen from solid substances containing at least one of carbon and hydrocarbons; bringing the ore into reaction contact with the reducing gas in a metallurgical blast furnace; and injecting a comminuted, fluidized plastics material into a blast current in a hearth region of the blast furnace, the plastics material comprising an agglomerate including plastics particles having a particle size substantially between 1 mm and 10 mm.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: June 30, 1998
    Assignee: Stahlwerke Bremen GmbH
    Inventors: Hans De Haas, Joachim Janz, Horstmar Mohnkern, Manfred Voss
  • Patent number: 5286008
    Abstract: A system for inerting a casting vessel, such as a traversable ladle or torpedo vessel, used for transporting molten metal, the vessel being positioned below the molten metal outlet opening at a transfer station, and the vessel cavity being flushed with an inert gas both prior to the molten metal inletting and during the inflow of the molten metal in such a manner as to avoid contact between the molten metal surface and the vessel and the atomospheric oxygen. A blowpipe is arranged in the vicinity of the molten metal outlet opening but does not intersect the molten metal stream, is located outside the free space profile of the vessel at least during the approach and return of the vessel, and terminates a distance from the vessel inlet opening and produces at its terminal end an inert gas stream which enters the cavity of the vessel adjacent the molten metal stream at an acute angle.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: February 15, 1994
    Assignee: Klockner Stahl GmbH
    Inventors: Hans de Haas, Klaus Ulrich, Klaus Grutzmacher, Erhard Krause, Horstmar Mohnkern, Manfred Lowenstein, Manfred Voss, Joachim Witt, Uwe Hammer
  • Patent number: 5246485
    Abstract: It is proposed, in the case of at least one transport and discharge runner installed at a tapping orifice of the metallurgical furnace and a transfer station having a swivel or tilting runner in which the molten metal flows from the discharge runner by way of a distribution system into the outlet openings from which it flows into a preferably movable casting vessel, to cover the discharge runners conveying the molten metal from the tapping orifice of the metallurgical furnace with cover hoods, to screen off the transfer station in a substantially gastight manner, to sweep these interiors with inert gas and in addition to screen off the molten metal discharge stream from the outlet opening to the casting vessel by means of a pressurized inert gas covering which prevents air access and is substantally annular in cross-section. By these means, fume production is effectively avoided.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: September 21, 1993
    Assignee: Klockner Stahl GmbH
    Inventors: Hans de Haas, Klaus Ulrich, Klaus Grutzmacher, Erhard Krause, Horstmar Mohnkern, Manfred Lowenstein, Manfred Voss, Joachim Witt, Uwe Hammer