Process for converting aluminum dross to ladle flux for steel processing
January 31, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMetal recovery process from aluminum dross Aluminum dross reclamation Process for recovery of free aluminum from aluminum dross or aluminum scrap using plasma energy Recovery of non-ferrous metals from dross using plasma torch Recovery of free aluminum from aluminum dross using plasma energy without use of a salt flux Process for using dross residues to produce refractory products Recovery of aluminum from dross using the plasma torch Patent #: 5135565 InventorsApplicationNo. 764693 filed on 09/24/1991US Classes:75/748, With vaporization of impurity as metal halide75/752Vaporizing metalliferous impurityExaminersPrimary: Andrews, MelvynAttorney, Agent or FirmInternational ClassC22B 007/04AbstractAn indirect plasma-arc processor for aluminum dross is disclosed. The process involves melting aluminum dross in the presence of a flux in a furnace equipped with one or more arc-forming electrodes, wherein the arc is formed with a gas, such as argon. Molten oxides are removed from time to time, and the volatiles are removed via off-gas ducts.Other References
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