Patents Assigned to Georg Fischer Disa Engineering AG
  • Process for melting of metal materials in a shaft furnace
    Patent number: 5946340
    Abstract: A process for smelting metallic raw materials in a shaft furnace having beds of metallic raw material and coke comprises injecting concurrently into the shaft furnace (1) a mixture of flue gases and oxygen at a subsonic velocity and (2) preheated oxygen at supersonic velocity wherein the supersonic velocity oxygen is injected into the coke bed.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: August 31, 1999
    Assignee: Georg Fischer Disa Engineering AG
    Inventors: Josef Ramthun, Albert Koperek