Patent ID: 8182575
Filing Date: 2012-05-22
Classification: C21B,C21C,C22B,Y02P

Abstract:
1. A producing method of direct reduced iron comprising the steps of: drying an oxidized iron raw material selected from the group consisting of iron ore and iron-making dust generated in an iron-making process to have a predetermined moisture content; mixing the oxidized iron raw material subjected to the drying step and a reducing material having a predetermined moisture content to obtain a mixture; pulverizing the mixture obtained in the mixing step for 80% minus-sieve to have a particle diameter of 70 μm to 500 μm; adjusting the moisture content of the mixture subjected to the pulverizing step; kneading the mixture subjected to the adjusting step; agglomerating the mixture subjected to the kneading step to be agglomerate; and reducing the agglomerate obtained in the agglomerating step by a rotary hearth furnace to generate direct reduced iron.