取鍋底吹法による溶銑の脱硫実験

概要

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A fundamental study on preliminary desulphurization of molten pig iron has been carried out by means of cold and hot model experiments. The results are as follows ; 1) The ladle porous plug method is one of the effective pretreatment processes of molten pig iron, and by application of this method, sulphur content in molten pig iron can be reduced easily and effectively, for example, from 0.04% to 0.006% under the selected condition. 2) Desulphurization of molten pig iron by this method runs satisfactory when desulphurizing agent with proper size (CaC_2 particles, about 3mm) that does not cause the slag build-up phenomenon is used, and when the flow rate of nitrogen is as large as possible without iron loss. The most suitable arrangement of the porous plugs is the three-plugs setting which their plugs are set on the vertex of regular triangle on the concentric circle having a half radius of the ladle bottom.
社団法人日本鉄鋼協会の論文
1971-06-01