Solid-liquid mixing operation is widely used in some chemical process such as polymerization, fermentation, catalysis, crystallization and waste water treatment. The stirred tank studied in the text is based on central tornado flow stirred tank by Guo Duxin and Hao Huidi. It uses large size blade instead of conventional size blade. This paper studies the stirring and mixing characteristics of the turbulence characteristics from the critical suspension speed and power consumption. In this paper the stirred t...