SUSPENSION SMELTING FURNACE AND METHOD FOR PRODUCING CRUDE METAL OR MATTE IN A SUSPENSION SMELTING FURNACE

摘要

The invention relates to a suspension smelting furnace (1), such as a flash smelting furnace, comprising a reaction shaft (2) comprising a burner (3). The burner (3) comprises a solid matter feed arrangement (4) for feeding solid matter (5) into the burner (3), and a reaction gas feed arrangement (6) for feeding reaction gas (7), such as oxygen-enriched air, to the burner (3). The burner (3) is arranged to feed solid matter (5) and reaction gas (7) into the reaction shaft (2) and to burn the solid matter (5) and reaction gas (7) fed into the reaction shaft (2), so that the solid matter (5) and reaction gas (7) react together forming a melt (8). In addition, the suspension smelting furnace (1) comprises a settler (9) arranged at the lower end of the reaction shaft (2), the settler (9) comprising a bottom (10), on top of which the melt (8) is collected, and an uptake shaft (11) arranged to the settler (9) for exhausting combustion gases (12) from the suspension smelting furnace (1). The burner (3) is arranged in the reaction shaft (2), at the distance of 2 to 5 meters from the surface (13) of the melt (8), above the surface (13) of the melt (8). The invention also relates to a method for producing crude metal or matte, such as blister copper, copper matte, fine nickel matte, or nickel matte in a suspension smelting furnace (1), such as a flash smelting furnace.