Abstract
Steelmakers have always been faced with the problem of sulfur control. The “reactivity” of a desulfurizer agent like lime to water it has been used as a standard test for predictions of the slag dissolution kinetics. The correlation between the two processes is not granted and a deeper understanding of both kinetics of dissolution is needed. In this paper a physical-mathematical model for the kinetic study of dissolution processes of non-porous powders in liquid phase is presented. A first application of the model has been given through the analysis of data relevant “water test”. A satisfactory agreement between the model's behaviour and the experimental data has been found. According to our results the dissolution of lime in water in a process controlled by the chemical steps. Therefore, at least when one need a comparison among the different commercial lime, the “reactivity” to water of calcium oxides seems to reflect the difference in the properties of the raw materials.
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