Patent ID: 6245122
Filing Date: 2001-06-12
Classification: C22B,F27B,F27D,Y02P

Abstract:
A scrap metal recovery furnace for reclaiming metals from metallic scrap material contaminated with combustibles comprising:an enclosed first chamber, the lower portion of which is a charge well for receiving molten metal and for receiving scrap material, said first chamber having an outlet above the level of said molten metal;an enclosed second chamber, the lower portion of which comprises a holding well to contain molten metal, said second chamber having;at least one burner for establishing a flame path over said well of said second chamber, said burner having adjustable oxygen/fuel controls operatively connected thereto;an inlet above the level of said molten metal; andan exhaust opening above the level of said molten metal;means connecting said first chamber to said second chamber so that said molten metal in said second chamber may flow into said first chamber;an enclosed passage extending from said outlet in said first chamber to said inlet of said second chamber such that fumes volatilized from melted scrap in said first chamber are movable to said second chamber;means for moving said fumes through said enclosed passage;a furnace control system being operatively connected to said burner oxygen and fuel controls; anda sensor for measuring the quantity of combustible matter in said fumes being inserted in said enclosed passage such that said fumes pass by said sensor, said sensor being connected to said furnace control system such that said oxygen/fuel ratio setting of said burner is adjusted by said furnace control system according to a predetermined ratio based on the measurement of combustible matter contained in said fumes.