Method of recovering metallic brass from the skimming of a brass melting furnace
Abstract
Abstract A METHOD OF RECOVERING METALLIC BRASS FROM THE SKIMMINGS OF A BRASS MELTING FURNACE, WHICH SKIMMINGS MAY CONSIST OR APPROXIMATELY EQUAL PARTS OF METAL AND METAL OXIDES, COMPRISING HEATING THE SKIMMINGS TO A TEMPERATURE SOMEWHAT ABOVE THE MELTING POINT OF THE METAL IN THE PRESENCE OF A FLUXING AGENT COMPRISING OXIDE OF BORON (FOR EXAMPLE, IN ANHYDROUS RASORITE CONCENTRATE) AND SODIUM CARBONATE WHICH CAUSES FORMATION OF A SLAG BLANKET AND REDUCING THE VISCOSITY OF THE SLAG BLANKET BY ADDING METAL WHICH REMAINS IN THE SLAG BLANKET AND COMBINES WITH OXYGEN, SIGNIFICANTLY INCREASING THE AMOUNT OF METALLIC BRASS WHICH COALESCES INTO DROPLETS WHICH SETTLE FROM THE SLAG BLANKET. THE ADDED METAL MAY COMPRISE AT LEAST ONE OF THE METALS OF THE GROUP CONSISTING OF CALCIUM, ALUMINUM, SILICON, MANGANESE AND TITANIUM. IN THE HEATING STEP THE COMPONENTS MAY BE PRESENT IN APPROXIMATELY THE FOLLOWING PROPORTIONS: 25,000 POUNDS OF SKIMMINGS, 715 TO 1430 POUNDS OF OCIDE OF BORON (FOR EXAMPLE, IN 1100 TO 2200 POUNDS OF ANHYDROUS RASORITE CONCENTRATE), 100 POUNDS OF SODIUM CARBONATE AND 50 POUNDS OF METAL WHICH REMAINS IN THE SLAG BLANKET AND COMBINES WITH OXYGEN.
Inventors
- 👤 Alfred R Barbour
Bibliographic Details
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