Abstract
Mixings were performed in a water model system of a gas-stirred ladle with both an optical decolorization method and conductivity measurements at different positions within the vessel. The experimental results show that the rate by which the concentration is homogenized depends on the location of the measuring probe as well as on the used stirring conditions, e.g. gas flow rate and position of the gas injection nozzle. Furthermore, a new theoretical mixing model that combines the concepts of the circulating concentration cloud and the two-tank model is presented. The results of numerical calculations using the model are compared with experimental data of mixing in the water model and in a 40-tonne steel ladle.
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