Impeller Geometry Effect on Velocity and Solids Suspension

Study of solid–liquid mixing in agitated tanks through electrical resistance tomography

“…Therefore, it is essential to know about the various factors affecting on solid-liquid suspension. These comprise: (a) physical properties of liquid such as density and viscosity (Chapman et al, 1983;Ibrahim and Nienow, 1994); (b) physical properties of solid such as density, particle size, sphericity, wetting characteristic of solid, tendency to entrap air, agglomerating tendencies of the solid and, hardness and friability characteristic of the solid (Becker, 1959;Baldi et al, 1978;Oldshue, 1983;Chapman et al, 1983;Altway et al, 2001); (c) process operating conditions such as liquid depth in the vessel, and solid concentration (Maude and Whitmore, 1958;Einenkel, 1980); (d) geometric parameters such as vessel diameter, bottom head geometry like flat, dished or cone-shaped, impeller type and geometry, impeller diameter, impeller clearance from the bottom of the vessel, baffle type and geometry and number of baffles (Mak, 1992;Armenante and Nagamine, 1998;Biswas et al, 1999;Wu et al, 2001;Paul et al, 2004); (e) agitation conditions such as impeller speed and impeller power, impeller tip speed, level of suspension achieved, liquid flow pattern, distribution of turbulence intensity in the vessel (Biswas et al, 1999).…”

High solids concentration agitation for minerals process intensification

“…The agitator energy efficiency is sensitive to the impeller off-bottom clearance and impeller diameter, as reviewed by [5][6][7][8][9] among others. It should be noted that most of these studies were concerned with Newtonian slurry, with low viscosity, and operations at relatively low-solids concentration, typically in the range ( 20% (v/v) and almost always with baffles installed.…”

A Digital Imaging Technique for the Analysis of Local Inhomogeneities from Agitated Vessels

“…It is noted the constant S value strongly depends on the vessel geometry [27] and impeller type. Therefore, it very difficult to perform an accurate literature review as mentioned by Pinho and Cavadas [28] and Wu et al [29].…”