焼結鉱製造における2層ペレット法適用の基礎的検討

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書誌事項

タイトル別名
  • Fundamental Study on the Sintering Process Using Duplex Mini-pellets
  • ショウケツコウ セイゾウ ニ オケル 2ソウ ペレットホウ テキヨウ ノ キソ

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抄録

A new sintering process was proposed which may cope with the increase in the ratio of fine iron ores. The basic concept associated with the new process using double layered mini-pellets (named duplex mini-pellets) was presented. The sintering experiments were conducted by using duplex mini-pellets and the quality of the produced sinter was evaluated by the various physical tests.<BR>(1) Excellent permeability was observed for the sintering bed using the duplex mini-pellets compared with that for the current sinter practice.The bed-permeation resistance was reduced because size and structure of the pellets remained unchanged in the course of sintering before the fusion.<BR>(2) By selecting the low melting region in CaO-Fe2O3 phase diagram as the chemical composition of the shell layer fines (CaO 20 wt%, Fe2O3 80 wt%), the sintering of the duplex mini-pellets was achieved at low temperature around 1230°C.<BR>(3) The sinter produced by the method mentioned above had the texture of primary hematite and binary calciumferrite without secondary hematite.<BR>(4) The sinter having such texture had excellent metallurgical properties, that is to say, low RDI, high JIS RI and good softening and melt-down properties.

収録刊行物

  • 鉄と鋼

    鉄と鋼 70 (6), 520-526, 1984

    一般社団法人 日本鉄鋼協会

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