Industrial Experience of Caustic Soda Recovery Integrated with Automatic Die Cleaning
Walter Dalla Barba and Fabio Vincenzi, Italtecno
Track: VALUE-ADDED PROCESSES - Extrusion
ABSTRACT --- Recently a new system for caustic soda recovery after cleaning
of extrusion dies has been invented and patented. This system allows the full
automation and control of all parameters (caustic soda, aluminum
concentrations, temperature) and the recovery of all caustic soda, which, after
complexing with aluminum, can be used again as free soda while aluminum is
eliminated as hydroxide. This system is fully integrated with a modern,
automated, and ecological plant for die cleaning. Technical, economic and
ecologic advantages are also described.
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