METHOD FOR OPERATING SELF-MELTING SMELTING FURNACE

摘要

PURPOSE:To drastically improve oxygen efficiency and to reduce the developing ratio of flue cinder by making the specific constitution of a concentrate burner in a self-melting furnace for nonferrous metal sulfide using oxygen-enriched air as air for reaction. CONSTITUTION:The concentrate burner 2' in the self-melting smelting furnace, is constituted of a wind box 17 having a contracting part 17a and an opening part 17b expanding downward, a concentrate chute 18 vertically arranged at center part of the wind box 17 so that the lower end positions at a little lower from the above contracting part 17a, an oxygen blowing pipe 19 concentrically penetrated into the concentrate chute 18 and providing a dispersing cone 20 in outer periphery of lower end part protruded at lower part from tip of this concentrate chute 18 and an auxiliary fuel burner 21 concentrically penetrated into the oxygen blowing pipe 19 and positioned so that the lower end comes to the same level as the lower end of this oxygen blowing pipe 19. This concentrate burner 2' is used, and by blowing the oxygen having quantity more than the oxygen quantity for auxiliary fuel from the oxygen blowing pipe 19, the developing ratio of flue cinder is reduced and the oxygen efficiency is improved.