Effect of impurities in industrial salts on aluminum scrap melting

Book · Tue Oct 01 00:00:00 EDT 1996

OSTI ID:372095

Ye, J; Sahai, Y ^[1]; Revet, A ^[2]

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1. Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering
2. Kalium Canada, ltd., Regina, Saskatchewan (Canada)

Aluminum scrap such as Used Beverage Containers (UBC) is melted under a protective molten salt cover. An appropriate salt protects metal from oxidation, promotes coalescence of molten droplets, and separates clean metal from the oxide contamination. Generally, the salt compositions for aluminum scrap recycling are based on equimolar mixtures of NaCl and KCl. A small amount of fluoride is also added in the salt. In the past, laboratory research at universities and industrial laboratories have been limited to pure salts. However, the industrial salts have impurities such as sulfates and other insoluble materials. These impurities have a pronounced effect on the efficiency of the scrap remelting process. In this paper, the role of impurities in industrial salts in terms of their chemical interactions with the metal are summarized. The efficiency of different industrial grade salts containing varying amounts of sulfates and other insoluble impurities for scrap recycling is compared.

• OSTI ID: 372095
• Report Number(s): CONF-960202-; ISBN 0-87339-312-0; TRN: IM9641%%172
• Resource Relation: Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Anaheim, CA (United States), 4-8 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of Light metals 1996; Hale, W. [ed.] [Anglesey Aluminum Metal Ltd., North Wales (United Kingdom)]; PB: 1304 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ALUMINIUM
MELTING
RECYCLING
ALUMINIUM ALLOYS
MAGNESIUM ALLOYS
MOLTEN SALTS
SODIUM CHLORIDES
POTASSIUM CHLORIDES
SODIUM FLUORIDES
CHEMICAL REACTIONS
IMPURITIES
SULFATES
OXIDES
SULFIDES
WEIGHT MEASUREMENT
PERFORMANCE
MATERIALS RECOVERY
EXPERIMENTAL DATA