Patent ID: 6146442
Filing Date: 2000-11-14
Classification: C21B,Y02P

Abstract:
An apparatus for direct reduction of iron oxides to a metallized iron product, comprising:(a) a generally vertical shaft furnace;(b) a device to charge particulate iron oxide material to the upper portion of said furnace to form a burden therein, and a device to remove metallized iron product from the bottom of said furnace, whereby a continuous gravitational flow of said burden can be established through the furnace;(c) a reducing gas inlet system comprising a single bustle having multiple sets of tuyeres communicating with said bustle said tuyeres being aligned in multiple vertically-spaced rows around the circumference of the furnace through which a common reducing gas is injected into the burden, said reducing gas inlet system located intermediate to the ends of the furnace and arranged integrally within the wall of the shaft furnace; and(d) a reacted gas outlet at the upper end of said furnace.