溶銑脱燐処理におけるスラグ形成過程

概要

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The dissolution rate of solid lime was estimated by fundamental equations obtained previously. In order to apply the equation to industrial operations, the relative velocity between solid lime and liquid slag was assumed by analogy with the process of scrap melting. The calculation suggested that lumpy lime can dissolve into the slag to only a few millimeters from the surface during a 20-min treatment under a hot metal pretreatment condition. As the difference of lime concentration in the molten slag and that at the surface of the solid lime, which is saturated with dicalcium silicate, is not large, solid lime can not dissolve rapidly. In addition to the chemical dissolution considered in this report, the mechanical detachment of the dicalcium silicate phase formed at the lime surface should be considered to improve the model.報文