| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing an agglomerate for the raw material for a blast furnace, in which an agglomerate for the raw material for a blast furnace having high strength can be produced even if coal having low softening-melting properties or hardly having softening-melting properties and high crystallization water-containing iron ore are combinedly used. <P>SOLUTION: In powdery coal A having the maximum fluidity MF of 0.3 to 2.5 by log MF, further containing a volatile matter VM of ≥10 mass% and containing ≥0.3 mass% sulfur S and powdery iron ore B containing crystallization water LOI of ≥3 mass%, the average particle diameter d<SB POS="POST">50</SB>of the powdery iron ore B (Do) is controlled to 5 to 70 μm, also, the ratio with the average particle diameter d<SB POS="POST">50</SB>of the powdery coal A (Dc), Do/Dc is controlled to 0.1 to 2.0, they are subjected to cold mixing by a mixer 1 to be a mixed raw material C, thereafter, the mixed raw material C is heated at 350 to 550°C by a heating device 2, the heated raw material C' is hot--molded by a hot molding machine 4 to produce a molding D, and the molding D is subjected to heating treatment at 560 to 750°C for ≥10 min in an inert gas atmosphere by a heat treatment device 5 to produce an agglomerate E for the raw material for a blast furnace. <P>COPYRIGHT: (C)2012,JPO&INPIT |
