Methods of processing aluminium dross and aluminium dross residue into calcium aluminate
Patent 5716426 Issued on February 10, 1998. Estimated Expiration Date: 
March 22, 2016. 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.
March 22, 2016. 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 ReferencesRecovery of aluminum from dross using the plasma torch Process for converting aluminum dross to ladle flux for steel processing Patent #: 5385601 InventorsApplicationNo. 620381 filed on 03/22/1996US Classes:75/672, Treating slag or dross423/600Aluminum (e.g., aluminate, etc.)ExaminersPrimary: Andrews, MelvynAttorney, Agent or FirmForeign Patent References
International ClassC01F 007/16Foreign Application Priority Data1995-03-24 NLAbstractThe processing of aluminium dross containing Al and Al2 O3 originating from aluminium production, comprises the steps of separating aluminium from the dross to produce a dross residue and reacting the dross residue at a temperature above 1360° C. with a calcium-oxygen compound to form calcium aluminate as an at least partially melted material. To obtain a product specially suitable for use in steel-making, the calcium aluminate is rapidly cooled to form a glassy solid product. The two steps may be performed in the same vessel, which has a suitable refractory lining.Other References
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