Melting, remelting and recovering of aluminium and its alloys

Claim 1

IN A METHOD OF MELTING ALUMINUM AND ALUMINUM ALLOYS IN A ROTARY FURNACE THE WALLS OF WHICH ARE INVOLVED IN HEAT TRANSMISSION FROM THE SOURCE OF HEAT TO THE CHARGE TO BE MELTED UNDER A SALT BATH, THE STEPS OF: INTRODUCING INTO THE FURNACE A SUITABLE SALT MIXTURE; HEATING THE MIXTURE TO ITS INCIPIENT MELTING TEMPERATURE WHILE MAINTAINING THE THERMIC INERTIA OF THE FURNACE AT ITS MAXIMUM VALUE; REDUCING THE THERMIC INERTIA AND SETTING IT AT ITS MINIMUM VALUE WHEN THE SALT MIXTURE IS FULLY LIQUEFIED; OVER-HEATING THE SALT AT MINIMUM THERMIC INERTIA OF THE FURNACE, REDUCING THE HEAT SUPPLY AND INTRODUCING INTO THE FURNACE THE METAL CHARGE TO BE MELTED; AGGLOMERATING THE METAL CHARGE WITH THE MOLTEN SALT BATH WHILE MAINTAINING THE THERMIC INERTIA AT ITS MINIMUM VALUE UNTIL METAL SALT CONGLOMERATE IS FORMED; RAISING THE THERMIC INERTIA OF THE FURNACE AND STARTING HEATING AGAIN TO BRING THE CONGLOMERATE TO ITS INCIPIENT MELTING STATE; REDUCING THE THERMIC INERTIA AND SETTING IT TO THE MINIMUM VALUE WHEN ALL THE CHARGE IS FULLY LIQUEFIED; PERSUING HEATING OF THE MOLTEN CHARGE UNTIL THE METAL REACHES A PREDETERMINED POURING TEMPERATURE; CUTTING OFF THE SOURCE OF HEAT AND POURING THE MOLTEN METAL.