US 10,683,562 B2 · Reduced iron manufacturing method

Abstract

The reduced iron manufacturing method of the present invention includes preparing an agglomerate by agglomerating a mixture containing an iron oxide-containing substance and a carbonaceous reducing agent, and preparing reduced iron by heating the agglomerate to reduce iron oxide in the agglomerate, characterized in that Expression (I) as follows is satisfied: Cfix×Xunder105/OFeO≤51 (I) where OFeO is the mass percentage of oxygen contained in the iron oxide in the agglomerate, Cfix is the mass percentage of total fixed carbon contained in the agglomerate, and Xunder105 is the mass percentage of particles having a particle diameter of 105 μm or less with respect to the total mass of particles configuring the carbonaceous reducing agent.

Claims14

Dependent claims

A reduced iron manufacturing method, the method comprising:

agglomerating a mixture comprising an iron oxide-containing substance and a carbonaceous reducing agent, to obtain an agglomerate;
and
heating the agglomerate to reduce iron oxide in the agglomerate, to obtain a reduced iron,
wherein Expression (I) as follows is satisfied:
Cfix×Xunder105/OFeO≤51 (I)
where OFeO is mass percentage of oxygen contained in the iron oxide in the agglomerate, Cfix is mass percentage of total fixed carbon contained in the agglomerate, and Xunder105 is mass percentage of particles of the carbonaceous reducing agent having a particle diameter of 105 μm or less with respect to total mass of particles of the carbonaceous reducing agent.

3 more elements

Dependencies are inferred from the claim text.

Reduced iron manufacturing method

Life of this patent

Reduced iron manufacturing method

Life of this patent

Abstract

Claims14