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Aluminum fluxing salts: a critical review of the chemistry and structures of alkali aluminum halides.

Authors
Sorrell-CA; Groetsch-JG Jr.; Soboroff-DM
Source
Avondale, MD: U.S. Department of the Interior, Bureau of Mines, IC 9069, 1986 Jan; :1-37
Link
NIOSHTIC No.
10005047
Abstract
The publication reviews the structural characteristics of crystalline phases and phase equilibria data for the system NaCl-KCl-AlCl3-NaF-KF-AlF3, which encompasses a large number of molten salt fluxes currently used in aluminum recycling. Its purpose is to provide guidelines for research into the relationships between molten salt compositions and their physical properties, notably vapor pressures, densities, surface tensions, and viscosities, knowledge of which is essential to minimizing fluxing efficiencies and metal recovery and minimizing hazardous emissions and disposal problems. In addition, the report describes experimental determinations of sub solidus compatibility relationships in the system, which is of the quaternary reciprocal type, containing 12 different stable 4-phase assemblages in the solid state. The compatibility diagram serves to define the important compositional planes across which important changes in properties are likely to occur.
Keywords
Cryolite; Aluminum-halides; Alkali-halides; Phase-equilibria; Fluxing; Metal-recovery; Hazardous-wastes; Aluminum-recycling; Molten-salt-fluxes; Recycling
Publication Date
19860101
Document Type
IH; Information Circular
Fiscal Year
1986
NTIS Accession No.
PB86-205259
NTIS Price
A03
Identifying No.
IC-9069
NIOSH Division
AVRC
Source Name
Avondale, MD: U.S. Department of the Interior, Bureau of Mines, IC 9069
State
MD
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