GAS BLOWING LANCE AND DEVICE FOR PRODUCTION OF FERROUS METAL BY DIRECT MELTING METHOD Russian patent published in 2005 - IPC

FIELD: metallurgy.

SUBSTANCE: proposed lance is used for blowing preheated oxygen-containing gas into converter with molten metal and slag bath; lance has elongated gas channel formed by inner and outer concentric tubes made from carbon steel; these tubes perform function of main load-bearing structure; gas is admitted through rear end and is discharged through front end; gas channel is provided with gas swirling unit; hot gas is admitted through inlet in rear end; provision is made for output unit connected with concentric tubes. Delivery and return units running from rear end to front end are made in wall of channel and are used for supply of cooling water to front end of channel and return of water from it. Outer surface of concentric tube of channel is provided with mechanical unit for holding the layer of solidified slag on channel. Channel is provided with lining made from refractory or other non-metallic material for protection of it against high temperature of flow at 800-1400°C. Invention gives description of device used for production of ferrous metal from iron-containing starting material.

EFFECT: enhanced operational efficiency during extended period of time.

35 cl, 19 dwg