転炉におけるクロム鉱石の高速還元条件の基礎検討(マンガン, クロム, 鉄の溶融還元とスクラップ溶解)(<特集>転炉機能の拡大)

概要

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Experiments have been carried out on smelting reduction of chromium ore to find out the conditions to get rapid reduction speed by 1 kg and 40 to 120 kg scale equimpents. And by introducing a rate control model, reduction speed have been investigated. The following results were obtained ; (1) Hard agitation, high temperature, fine ore size and low (MgO+Al_2O_3) content slag were efficient in getting rapid reduction speed. (2) As an ore charging method, top blowing of ore, flux and coal mixture through oxy-coal lance were most effective. (3) By using a mixed rate control model consisting of dissolution of ore into slag phase and reaction at the interface of carbonaceous substances and (Cr) in molten slag, contributions of several conditions to reduction speed were explained.
社団法人日本鉄鋼協会の論文
1990-11-01