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- Title
Investigation of the effect of the surfactant on the mixing of highly concentrated slurries of fine particles via SEM, RSM, and CFD.
- Authors
Kazemzadeh, Argang; Ein-Mozaffari, Farhad; Lohi, Ali; Bank, Ali
- Abstract
The main purpose of this research was to explore the likelihood of preparation of highly concentrated slurries of stabilized submicron CaCO 3 particles using a surfactant in a pilot-scale mixing system. To achieve this goal, the effects of independent factors such as CaCO 3 and surfactant (lecithin) concentrations, impeller type, and their interactions on power consumption, slurry rheological characteristics, and particle size were investigated. Employing the Eulerian-Granular multiphase model, a computational fluid dynamics model (CFD) was created. The validated CFD model was utilized to assess the degree of homogeneity for slurries agitated inside the mixing system. The lowest power consumption, the smallest particle size and consistency index, and the highest power-law index were achieved for highly concentrated slurries containing the optimal amount of lecithin (3.5 wt%) for the stabilization of fine CaCO 3 particles. The high-shear sawtooth impeller was shown to be the most efficient impeller for mixing fine CaCO 3 slurries containing lecithin. [Display omitted] • The optimal concentration of surfactant was found to be 3.5 wt%. • Smaller particle sizes were attained at the optimal surfactant concentration. • Use of 3.5 wt% surfactant led to the shortest mixing time and lowest power consumption. • Impeller type and surfactant concentration had a significant effect on the particle size. • Sawtooth impeller was the most efficient impeller for slurry preparation.
- Subjects
SLURRY; PARTICULATE matter; SURFACE active agents; COMPUTATIONAL fluid dynamics
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2024, Vol 203, p178
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2024.01.040