Patent ID: 9034074
Filing Date: 2015-05-19
Classification: C21B,C22B,Y02P

Abstract:
1. A method for producing a reduced iron pellet, the method comprising producing the reduced iron pellet by heating and reducing a powder formed article including iron oxide and carbon in a rotary hearth furnace, wherein a formed article, produced using a raw material in which an average diameter of the iron oxide is 25 microns or less, a ratio of carbon monoxide to carbon dioxide in a reduction zone is from 0.3 to 1, and a ratio of an atom mole amount of fixed carbon to an atom mole amount of active oxygen is 0.7 to 1.5, is reduced at a temperature of 1400° C. or less, and a reduced iron pellet is produced in which a ratio of metallic iron to total iron is 50 to 85% and a content of residual carbon is 2% or less.