METHOD FOR DECREASING METAL LOSSES IN NONFERROUS SMELTING OPERATIONS

摘要

The present invention provides a method for producing a metal matte from a non-ferrous metal-containing sulfide mineral concentrate in a horizontally disposed furnace wherein a molten charge of metal matte and slag are present, beneath an enclosed hot atmosphere, an exhaust gases, metal matte and slag are separately discharged therefrom, the improvement wherein loss of nonferrous metals is averted comprising: (a) introducing said sulfide concentrate, flux and an oxygen-rich gas into an enclosed hot sulfur dioxide rich atmosphere so as to effect flash oxidation of the sulfide concentrate therein prior to contact of said concentrate with the molten slag; and (b) sprinkling melted iron sulfide-rich sulfide concentrate into the furnace by means of a burner, using fossil fuel and oxygen-rich gas as the main heat source therefor, to spread the same onto the slag, at a location adjacent and downstream from the introduction of said sulfide mineral concentrate, flux and oxygen-rich gas and spaced from the discharge for said slag.