| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a producing method and producing equipment of reduced iron which prevents the reoxidation of the reduced iron produced in a rotary hearth type direct reducing furnace. SOLUTION: In the producing method of the reduced iron, raw material pellets which is produced by mixing iron oxide powder and carbonaceous powder are reduced in the rotary hearth type direct reducing furnace 1 and the reduced iron produced in the rotary hearth type direct reducing furnace 1 is melted in a closed type electric iron-making furnace 14 and also, reducing gas consisting essentially of CO2 by-produced in the clased type electric iron-making furnace 14 is made to flow into just the front of a discharging part 3 for reduced iron pellet in the rotary hearth type direct reducing furnace 1. In such a way, the reducing gas by-produced in the closed type electric iron-making furnace 14 is introduced just before the discharging part 3 for reduced iron pellet in the rotary hearth type direct reducing furnace 1 which is easily brought into contact with oxidizing gas (O2, CO2 and H2O gas, etc.), to lower the partial pressure of the oxidizing gas near the discharging part, and the reoxidation of the high temp. reduced iron pellet is restrained.</p> |
