FIELD: metallurgy. SUBSTANCE: method is realized by method of fluidized bed. Oxide-containing material is suspended in fluidized bed by flow of reducing gas flowing from below upward and reduced in this way. Velocity of flow of reducing gas in empty pipe exclusively higher the fluidized bed is continuously decreased with prevention of formation of vertexes over the entire free cross-section of space existing above fluidized bed, for instance, from 0.8-1.5 m/s at inlet and 0.4-0.75 m/s at outlet. The plant for embodiment of the method has reactor and gas distributing bottom on which material fluidized bed is located and under which pipeline of reducing gas is located. Channels of loading and unloading are located above gas distributing bottom. Upper section of reactor is cylindrical in shape and fulfils the role of quieting section and is provided with cover from which runs pipeline of reducing gas discharge. Reactor also has lower cylindrical section and intermediate conical section whose wall maximum inclination relative to reactor central axis equals to 10 deg, in particular, 8 deg. Installed in reactor may be dust separator with pipeline for recirculating dust introduced into reactor lower cylindrical section, and inlet for dust-laden gas to dust separator is located in upper quieting zone. EFFECT: increased period of operation of plant for reduction of oxide-containing material without interruption caused by sticking or contaminating. 13 cl, 3 dwg
Authors
Dates
1999-01-27—Published
1995-09-14—Filed