Recovery of metal from dross
Abstract
Abstract PROCEDURE FOR TREATING DROSS FROM A MOLTEN ALUMINUM SURFACE TO RECOVER FREE METAL CONTAINED IN THE DROSS BY HEATING THE DROSS IN AN INDUCTION FURNACE IN THE PRESENCE OF A SALT FLUX. PREFERABLY, THE DROSS IS INITIALLY RAPIDLY QUENCHED UPON REMOVAL FROM THE MOLTEN SURFACE, TO MAINTAIN A HIGH FREE METAL CONTENT IN THE DROSS. WITH A HEEL OF MOLTEN ALUMINUM ESTABLISHED IN THE INDUCTION FURNACE, A SUBSTANTIAL PROPORTION OF THE FLUX IS ADDED, AND THE DROSS IS THEN FED TO THE MELT IN SUCCESSIVE INCREMENTS WHICH MAY BE INTERSPERSED WITH FURTHER ADDITIONS OF FLUX. HEAT AND FLUID CIRCULATION CAUSED BY INDUCED CURRENTS IN THE MELT AND BY THE ELECTROMAGNETIC FIELD EFFECT SEPARATION AND COALESCENCE OF FREE METAL FROM THE DROSS.
Inventors
- 👤 Melvin Elliott Mcleod
- 👤 John Edward Deutschman
- 👤 Herbert Warren Percival
- 👤 Hans Spoel
Bibliographic Details
Claims Analysis
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