Patents Assigned to Kuttner GmbH & Co. KG
  • Process for regenerating used foundry sand
    Patent number: 5279741
    Abstract: The invention relates to a process for regenerating used foundry sand, whose original molding sand contained, as the molding material, inorganic binders such as, for example and especially, bentonite ("inorganic used sand") and/or organic binders such as, for example and especially, phenolic resins and/or furan resins ("organic used sand"), wherein the used sand to be reconditioned is impregnated with water and then transferred in the moist state into a heated fluidized bed.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: January 18, 1994
    Assignee: Kuttner GmbH & Co. KG
    Inventor: Klaus Schott
  • Process and apparatus for producing steel from scrap
    Patent number: 4753677
    Abstract: A process and apparatus for producing steel from scrap. A cupola furnace is provided with a layer of coke in the vicinity of the tuyeres of the furnace, with scrap to be melted being supplied upstream of the layer of coke and molten scrap passing through the layer of coke to a converter located downstream of the furnace. The molten scrap is refined in the converter with oxygen, thereby producing a CO-rich converted waste gas, which is supplied to the coke layer and burned in the vicinity of the tuyeres.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: June 28, 1988
    Assignee: Dr. Kuttner, GmbH & Co. KG
    Inventor: Hans-Gunther Rachner