METHOD OF CONCENTRATION OF TITANIUM-CONTAINING RAW MATERIAL AND DEVICE FOR REALIZATION OF THIS METHOD Russian patent published in 2003 - IPC

FIELD: non-ferrous metallurgy; technology and equipment for concentration of titanium- containing raw materials. SUBSTANCE: proposed method includes warming-up of furnace, preparation of charge from carbon-containing reductant, loading, smelting and reduction of charge at continuous evacuation of reactive gases, cooling of hearth, furnace roof , contact unit and flexible flow lines, extraction of melting products from furnace and cleaning of exhaust gases. Prior to loading, reductant and raw material are proportioned at ratio of 1: (8-10), mixed and fed to center of furnace; melting and reducing processes are conducted at continuous delivery of air to gas space of furnace; cooling of hearth is effected at constant temperature of its lining not above 450 C. Besides that, cooling of furnace roof is effected by cooling each individual section by means of evaporative cooling system. Device proposed for realization of this method includes metal sectional casing, lining made in form of hemispherical cooled hearth and shaft of furnace, tap- hole, furnace roof made in form of water-cooled jacket provided with water supply and discharge branch pipes and plate made from high-temperature concrete for mounting the charge delivery unit, gas duct for evacuation of exhaust gases and electrodes with current leads and contact units. It is additionally provided with proportioners with conveyer connected via dispensing bins with charge delivery unit installed in center of roof, hearth cooling passages located in lining in plane parallel to furnace base and connected with air delivery manifold. Furnace roof is made in form of detachable segment sections ; each section consists of water jacket fitted with water supply and discharge branch pipes; lower portion of water jacket is filled with high-temperature concrete. EFFECT: reduced power requirements; increased service life of furnace. 14 cl, 5 dwg, 1 ex