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Aluminum Recycling, 2nd Edition
book

Aluminum Recycling, 2nd Edition

by Mark E. Schlesinger
December 2013
Intermediate to advanced content levelIntermediate to advanced
282 pages
9h 56m
English
CRC Press
Content preview from Aluminum Recycling, 2nd Edition
209Metal Refining and Purification
MgCl
2
+ 2Na = Mg + 2NaCl (slag) (12.19)
MgCl
2
+ Ca = Mg + CaCl
2
(slag) (12.20)
These uxes are premelted with KCl (to prevent hydration of the MgCl
2
) at one of
several compositions corresponding to eutectics in the KCl–MgCl
2
system. The price
of KCl is volatile, so Courtenay (2011) has demonstrated that satisfactory sodium
removal can be achieved with an MgCl
2
–KCl–NaCl eutectic ux that reduces the
cost. Adding 1–3 wt.-% uorspar (CaF
2
) improves reaction efciency.
Many of the same methods for improving degassing kinetics also improve
the kinetics of reactive-metal removal. The effectiveness of chlorine injection ...
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Publisher Resources

ISBN: 9781466570245