連続脱燐炉による溶銑の予備処理について

概要

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Continuous pre-dephosphorization process with 300kg trough type furnace was examined ; with the hot metal input rate : 33∿38kg/min, oxygen blowing rate : 0.7Nm^3/min, and flux rate : 4∿5kg/min. The slag was co-current with the metal. As the result of one and two lance-operations, it became clear that the two lance-operation was more advantageous for slag-metal reactions as predicted from the characteristics of the resistance model. Moreover, from a theoretical analysis it was proved that the slag-metal reactions could proceed most effectively when the gas-liquid flow rate ratio {(oxygen blowing rate+CO gas generating rate)/hot metal rate} of each lance was kept equal. By utilizing the result of this investigation it would be possible to develop a continuous pre-treatment process of hot metal with higher dephosphorization ability by optimizing the physical conditions of the process and by the operation such as the adoption of countercurrent.
社団法人日本鉄鋼協会の論文
1978-12-01