PROCESS FOR MANUFACTURING REDUCED IRON AGGLOMERATES

摘要

A process for manufacturing reduced iron agglomerates which comprises introducing starting agglomerates that comprise both an iron oxide-containing material and a carbonaceous reducing agent onto the hearth of a moving-bed heating furnace, and heating the agglomerates to reduce the iron oxide contained in the agglomerates, wherein the iron oxide-containing material contained in the starting agglomerates has a mean particle diameter of 4 to 23 μm and contains at least 18% of particles having diameters of 10 μm or less. By the use of such starting agglomerates, the process attains: an improvement in the yield of reduced iron agglomerates having large particle diameters; a reduction in the manufacturing time, said reduction leading to an enhancement in the productivity; and a remarkable reduction in the content of impurities such as sulfur in the reduced-iron agglomerates.

主权项

1. A method for manufacturing reduced iron agglomerates, comprising:
charging a compact comprising an iron oxide-containing material and a carbonaceous reducing agent onto a hearth of a moving-bed heating furnace, and heating the compact to reduce iron oxide in the compact thereby producing the reduced iron agglomerate, wherein the compact comprising the iron oxide-containing material has a mean particle diameter of from 4 to 23 μm and comprises particles with a particle diameter of 10 μm or less in a proportion of 18% by mass or more.