Grinding of calcite suspensions in a stirred media mill: Effect of operational parameters on the product quality and the specific energy

Abstract

This is an author's version published in: http://oatao.univ-toulouse.fr/20264 To cite this version:Ouattara, Soualo and Frances, Christine Grinding of calcite suspensions in a stirred media mill: Effect of operational parameters on the product quality and the specific energy. (2014) Powder Technology, 255. 89-97. a b s t r a c t a r t i c l e i n f o Keywords: Wet grinding Stirred media mill Particle size RheologyThis paper investigates the production of calcite suspensions by a wet grinding process in a stirred media mill. The experimental set-up allows the circulation mode process in the presence of sodium polyacrylate as additive. The influence of different operational parameters on grinding results in terms of particle size distribution and rheological behavior of the suspensions as well as the grinding efficiency is presented. We observe that the specific energy input that leads to a required product quality is not the same. Moreover, analyzing the trend of particle size versus the specific energy input instead of versus the grinding time, different and opposite conclusions flow from the experiment results. In addition, the effect of particle mean size on the suspension viscosity is presented.

Wet grinding of CaCO3 with a stirred media mill: Influence of obtained particle size distributions on pressure filtration properties

“…Fine and ultrafine wet grinding of minerals, pigments, coatings, pharmaceuticals and other materials using stirred media mills is increasing [4][5][6]. The size of these mills varies, from < 1 dm 3 to several m 3 , depending on the application [7].…”

Special issue on innovative processes and materials

“…Special issue on innovative processes and materials drug in order to improve its bioavailability [12]. Wet nanogrinding process, as a route to produce nanoparticles in dense suspensions using a stirred media mill, is then described in the next paper [13]. Then, papers [14] and [18] both concern crystallization processes but with two different strategies.…”

“…A second group of papers [12][13][14][15][16][17][18] focuses on the analysis of innova-tive processes used to produce powders with the desired properties. In the first paper, the work is focused on the CO 2 -induced precipitation of a http://dx.doi.org/10.1016/j.powtec.2014.01.066…”

Optimization of Operating Parameters on Dry Grinding of Calcite in a Stirred Media Mill Using the Box-Behnken Design

“…Many parameters may influence the outcomes of dry grinding in stirred media mills. It is possible to classify such parameters as the mill's design properties (e.g., impeller types, the features of impeller arms, the length/diameter ratio of the mill, the orientation of the shaft), vertical [6][7][8] or horizontal [9][10][11][12] 2 of 11 and operating parameters (e.g., grinding time [7,[13][14][15], stirrer speed [6,9,13,[15][16][17][18], media loading, type and size [13,19,20], grinding type. The information obtained from these studies shows that dry stirred media mills are still in an early to intermediate stage of development.…”