| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for pretreating a raw material for sintering, by which an iron ore material containing fine powder in an amount larger than before can be dealt with, pellets having pelletization characteristics and strength more improved than before can be prepared and a sintered ore with superior quality can be manufactured. SOLUTION: Pellets containing an iron ore having a content of crystal water of≥3 mass%, e.g., Maramanba ore, pisolite ore or high phosphorous Brockman ore at least in one part and pelletized in the presence of water are dried at a temperature of≥40 and≤250°C before it is charged into a sintering machine 21. Thereby, the decomposition of crystal water is suppressed and further inhibited because the drying temperature is controlled to be≥40 and≤250°C. Further, the breakdown and degradation of the pellets can be suppressed and further prevented. COPYRIGHT: (C)2007,JPO&INPIT
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