Patent ID: 6585929
Filing Date: 2003-07-01
Classification: C21B,F27B,F27D,Y02P

Abstract:
A direct smelting vessel which is adapted to contain a molten bath of metal and slag and includes: a hearth; side walls that extend upwardly from the hearth; a roof; an off-gas chamber that extends upwardly from the roof, the off-gas chamber having an upwardly extending side wall; and an off-gas duct extending from the side wall of the off-gas chamber for discharging from the vessel an off-gas that is produced during a direct smelting process operated in the vessel, said off-gas duct includes:(a) a first section which has an off-gas inlet positioned in an upper section of the vessel so that off-gas is forced to undergo a substantial change of direction to enter the first section, the first section having an upward inclination of greater than 0Â° and less than 30Â° to the horizontal; and (b) a second section which extends upwardly from an upper end of the first section at a relatively steep inclination to the horizontal whereby in use off-gas flowing through the duct undergoes a substantial change of direction on flowing from the first section into the second section.