ORALS

<p>The mass transfer rate between different phases such as solid/liquid and liquid/liquid is important to control the slag/metal reaction in the pyrometallurgy field. The solid/liquid mass transfer rate was changed by the suspension patterns of sedimentary particles [1] and floated ones [2, 3] in an impeller stirring. When the stagnant particles partially suspend into liquid, the mass transfer rate began to enhance rapidly, and it was promoted by the collision of lighter density of particles with the impeller and the irregular dispersion into the liquid phase. The liquid/liquid mass transfer rate was also affected by the collision of lighter density of liquid with the impeller [4, 5]. The liquid/liquid flow characteristics of impeller stirring were investigated by a two-dimensional PIV experiment and a computational fluid dynamics (CFD) technique [6] and the space-averaged velocity were found to irregularly enhance when the lighter liquid began to collide with the impeller. The particle penetration depth enhanced the solid/liquid mass transfer rate in the particle blowing technique [7]. In this study, based on the above results of cold model experiments and CFD, the relationship between the mass transfer rates between different phases and suspension pattern was adjusted as a whole.</p>

References:
<p>[1] Y. Tokura, M. A. Uddin, Y. Kato, Ind. Eng. Chem. Res. 58(2019) 10172-10178. [2] R. Shiba, M. A. Uddin, Y. Kato, S. Kitamura, ISIJ Int., 54(2014), 2754-2760. [3] R. Shiba, M. A. Uddin, Y. Kato, Tetsu-to-Hagane, 102(2016), 196-201. [4] S. Horiuchi, M. A. Uddin, Y. Kato, Y. Takahashi, Y. Uchida, ISIJ Int., 54(2014), 87-93. [5] S. Horiuchi, M. A. Uddin, Y. Kato, N. Kikuchi, ISIJ Int., 54(2014), 82-96. [6] T. Okuno, M. M. A. Uddin, Y. Kato, S. B. Lee, Y. H. Kim, ISIJ Int., 57(2017), 1902-1910. [7] R. Tanaka, M. A. Uddin, Y. Kato, ISIJ Int., 58(2018), 620-626.</p>