ソーダ灰の底吹きおよび上吹き精錬の比較(脱りん・脱硫 : ソーダ系スラグ)(<特集>溶銑処理の発展)

概要

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Hot metal refining using the flux containing Na_2CO_3 was studied on a laboratory scale by comparison of bottom injection method with top blowing method using argon or oxygen gas as a flux carrier. Excellent desulfurization performance could be obtained by the bottom injection method, particularly on using argon gas as a flux carrier. This was due to a increase in flux/metal interfacial reaction area which was estimated about 3 times as large as that of top blowing method. However, efficient phosphorous removal could not be achieved by the bottom injection method because the reaction of Na_2CO_3 with C took place instead of the reaction of Na_2CO_3 with P, especially in the region of low phosphorous content level. On the other hand, in the case of top blowing, dephosphorization reaction proceeded to the extreamly low phosphorous content level without remarkable decarburization reaction.
社団法人日本鉄鋼協会の論文
1983-11-01