| 摘要 |
PROBLEM TO BE SOLVED: To provide nonfired agglomerated ore for iron manufacture having required strength in normal temperature and furnace low temperature regions, and in which degradation, reduction/degradation or the like caused by the thermal decomposition of a binder are hard to occur in the furnace high temperature region. SOLUTION: The nonfired agglomerated ore is obtained by binding a plurality of primary particles obtained by granulating a mixture in which an iron raw material A for iron manufacture is blended with a hydraulic binder B. The plurality of primary particles are coated and bound with a binder composed of a mixture obtained by blending the hydraulic binder B and iron oxide-containing powder C in which the ratio of the particles with a particle diameter of≤10μm is≥90 mass% and iron oxide-containing powder C. In normal temperature and furnace low temperature regions, its strength is secured with the hydraulic binder B, and, in a furnace high temperature region, the primary particles are hard to be subjected to reduction/degradation, and also, by the sintering of the iron oxide-containing powder C, the strength of the primary particles and the strength in binding between the primary particles are secured. COPYRIGHT: (C)2008,JPO&INPIT
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