A process for treatment and recovery of spent potliner (SPL)

Conference · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:372100

Adrien, R J; Besida, J; Pong, T K; O`Donnell, T A; Wood, D G; Covey, G H ^[1]; Giansiracusa, J J; Price, D E ^[2]

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1. Univ. of Melbourne, Parkville, Victoria (Australia). Dept. of Chemical Engineering
2. DEPCO-TRH Pty. Ltd., Melbourne, Victoria (Australia)

Spent potliner (SPL) is classified as a hazardous waste as it contains cyanides and high levels of fluorides. This paper describes a novel process for the conversion of SPL at near ambient temperatures for the recovery of useful products and a benign residue. The initial treatment of crushed SPL removes over 90% of the cyanide and a large percentage of the fluoride. By appropriate selection of the chemical species and wash conditions aluminum fluoride and other fluorides are effectively recovered in subsequent stages. After this treatment by a series of chemical washes the residue produced is a carbonaceous material containing only carbon and brick fragments, i.e. refractory aluminum compounds.

• OSTI ID: 372100
• Report Number(s): CONF-960202--; ISBN 0-87339-312-0
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
ALUMINIUM
ALUMINIUM FLUORIDES
AQUEOUS SOLUTIONS
CALCIUM FLUORIDES
CARBONACEOUS MATERIALS
CRUSHING
CYANIDES
FILTRATION
FLOWSHEETS
HAZARDOUS MATERIALS
INORGANIC ACIDS
MATERIALS RECOVERY
PRECIPITATION
SMELTING
WASHING
WASTE PROCESSING
X-RAY DIFFRACTION