溶融 Fe-Cr, Fe-Ni 原料からの上吹き併用による AOD 炉でのステンレスの直接製造方法

概要

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The LD-AOD process was previously reported. This report is concerned with direct stainless steelmaking by AOD process with top blowing from molten Fe-Ni and Fe-Cr materials, which has been investigated in order to get increased saving of materials and energy. The results obtained are as follows : 1) The steelmaking process can be simplified because of unnecessary pretreatment in the E.F. or the L.D. converter. 2) AOD with top blowing is effective to refine high carbon (C=3.5∿4.5%) and high silicon (Si=1.5∿2.5%) molten alloys. It results in increase of the decarburization and desiliconization rate, and consequently reduces operation time and Fe-Si consumption. 3) Although 84% of the inert gas consumed is nitrogen, the nitrogen content in the products can be controlled below 650ppm.
社団法人日本鉄鋼協会の論文
1983-05-01