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    • 9. 发明专利
    • Method of operating rotary hearth reducing furnace
    • JP5368522B2
    • 2013-12-18
    • JP2011200107
    • 2011-09-14
    • 株式会社神戸製鋼所
    • 宏志 杉立孝夫 原田脩 土屋英年 田中
    • C21B13/10C22B1/16C22B5/10
    • PROBLEM TO BE SOLVED: To provide a method for operating a rotary hearth type reducing furnace, with which in the operation of the rotary hearth type reducing furnace for producing the reduced metal, the abrasion of the cutting edge of a screw in an exhausting apparatus is prevented or decreased by preventing the formation of the strong platy fixing material to a hearth and facilitating the exhaust of the fixing material while minimizing the rise of the equipment cost and operation cost, and also, by achieving the long period of the continuous operation, the high working ratio can be achieved. SOLUTION: After previously adding fixing-inhibition agent into agglomerated material containing powdery metallic oxide and powdery carbonaceous material, the agglomerated material is charged on the hearth with a charging device and the fixing-inhibition agent is scattered into the fixing material formed on the hearth. Then, when the reduced iron is raked out to the outside of the furnace with the exhausting apparatus, the crack is made on the fixing material as the starting point of the fixing-inhibition agent by scraping while adding the compressing force to the fixing material at the same time, and the fixing material is peeled off from the hearth while dividing into the small pieces and is raked out together with the reduced iron. COPYRIGHT: (C)2012,JPO&INPIT