微粉炭多量吹き込みを併用した高酸素濃度空気吹き竪型炉による高炭素フェロマンガンの製造試験

概要

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High-carbon ferromanganese has been produced by electric arc furnace in Japan. But its production cost has increased because of a speedy rising of electricity cost and Japanese ferromanganese has lost competitiveness in the international market. So, for the purpose of decreasing its production cost, high-carbon ferromanganese production tests (production rate=1.9-4.3t/d) were performed using a melting test furnace with coke packed bed injected with highly oxygen enriched air and a large quantity of pulverized coal. Moreover the operation indices of a commercial plant of 170t/d in production capacity were estimated by heat and mass balance model, and following results were obtained. 1) In this test, high-carbon ferromanganese of [Mn]=75% was produced stably using the coke blended with 56% non-coking coal, with coal rate of 1502kg/t, coke rate of 1087kg/t and productivity of 3.11t/(d・m^3). 2) The total coal consumption of the commercial plant of this method is estimated to be less than that of the blast furnace in spite of higher fuel rate because a large quantity of pulverized coal is used in this process. Through these investigations, this process seems to have a prospect of being available as a ferromanganese production process instead of electric furnace method.
社団法人日本鉄鋼協会の論文
1993-04-01