METHOD FOR PRODUCING SINTERED ORE, METHOD FOR PRODUCING MATERIAL FOR SINTERING, GRANULATED PARTICLE, AND SINTERED ORE

摘要

Sequentially forming the core particles first cover layer 52, the second cover layer 53 with limestone and a solid fuel based material by using the SiO ₂ containing the raw material in accordance with the iron-containing material and optionally on the surface of (51) containing iron ore and to granulated particles (50), and sintering the granulated particles (50) to produce a sintered ore (50a). A first iron-containing material used in the cover layer 52 has a porosity of 20%, or a porosity of less than also Al ₂ O ₃ content is 2.1% or less 20%, and iron ore for the nucleus particle has a first cover layer 52 than the iron-containing material used in a high porosity, or porosity, and Al ₂ O ₃ either or both of the high content.