Patent ID: 6379418
Filing Date: 2002-04-30
Classification: C22B,Y02P

Abstract:
A salt flux composition effective for use in the recovery of scrap aluminum comprising:at least about 90 weight percent, based upon the weight of the salt flux composition, of a high purity alkali metal salt selected from the group consisting of NaCl, KCl and mixtures thereof; from about 0.2 to about 3 weight percent, based upon the weight of the salt flux composition, of an alkaline agent; from about 3 to about 7 weight percent, based upon the weight of the salt flux composition, of and a fluoride source, the alkaline agent and fluoride source each in amounts effective for improving the recovery of aluminum in a process which includes the recovery of aluminum from remelted molten scrap aluminum as compared to a process which utilizes a salt flux composition consisting essentially of a high purity alkali metal salt without the alkaline agent and fluoride source.