Abstract:
1. A METHOD OF RECOVERING ALUMINUM VALUES FROM ALUMINUM MATERIAL FED TO A POOL OF MOLTEN SALT, THE MEMETHOD COMPRISING THE STEPS OF (1) FEEDING ALUMINUM MATERIALS INTO SAID POOL, (2) CONTACTING THE ALUMINUM MATERIALS WITH SAID MOLTEN SALT, THE SALT BEING EFFECTIVE TO SEPARATE NON-METALLIC SOLIDS FROM THE ALUMINUM MATERIAL, AND THEREBY RELEASE MOLTEN ALUMINUM, (3) REMOVING MOLTEN ALUMINUM FROM SAID POOL OF SALT THEREBY SUBSTANTIALLY DEPLETING THE SAME OF ALUMINUM VALUES WHILE LEAVING ITENRICHED WITH A SUSPENSION OF NON-METALLIC SOLIDS, (4) CIRCULATING THE SALT ENRICHED WITH NON-METALLIC SOLIDS TO MAINTAIN SUSPENSION OF THE SAME IN SAID SALT AND TO DIRECT THE SUSPENSION AND SALT TO A DEVICE CAPABLE OF COLLECTING AND THEREBY REMOVING SOLIDS FROM SAID SALT TO SUBSTANTIALLY DEPLETE THE SALT OF SAID SOLIDS WHILE THE SALT DEPLETED OF SAID SOLIDS IS RETURNED DIRECTLY TO THE CIRCULATING SALT FROM THE DEVICE, AND
(5) CORRELATING THE FEEDING OF SAID ALUMINUM MATERIALS WITH THE REMOVAL OF SAID NON-METALLIC SOLIDS TO MAINTAIN IN SAID POOL A SOLIDS CONTENT NOR EXCEEDING 25 PERCENT BY WEIGHT OF THE SALT THEREIN.
Abstract:
A device and method particularly suitable for separating particulate matter in a molten salt or molten metal bath from the bath. The device comprises a unitary bowl and pump structure adapted to be immersed into and rotated in a pool of the bath, and to draw into the bowl the bath and particulate matter when the bowl is rotated. With rotation of the bowl, the particulate matter, in large measure, is collected in a concentrated form in the bowl while the bath, which is now largely depleted of particulate matter, is discharged from the bowl. To remove the particulate matter, and any bath entrapped therewith, from the bowl, the bowl is removed from the bath and a blade means is inserted into the bowl to scrape the particulate matter from the bowl. The particulate matter falls from the bowl through an opening provided in the lower end thereof. After the particulate matter is removed from the bowl, the bowl is returned to the bath for another cycle of collection and particle removal.