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Water Structure Changes within High Solids Loading Calcium Carbonate Slurries

Joshua J. Taylor, Yi-Chung Wang, Wolfgang M. Sigmund

Journal of Ceramic Science and Technology, Vol. 1, No. 1 (2010), pp. 7-14

DOI: 10.4416/JCST2010-00003

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Abstract

Slurries with up to 75 ms% calcite were investigated with attenuated total reflectance – Fourier transform infrared spectroscopy (ATR-FTIR). It was found that infrared absorption bands for water and deuterated water in slurries strongly depend on the solids loading. As the solids loading increases there is a decrease in structured water. Aging of the slurry reverses the trend and increases the amount of structured water. These measurements indicate that results obtained in dilute conditions as required by many scientific characterization techniques may not be extrapolated to high solids loading slurries for calcium carbonate. Furthermore, these results provide the first explanation for unexplained increases in viscosity of aging slurries at high solids loading.

Keywords

calcium carbonate, slurry, water structure, adsorption, dispersion, sodium polyacrylate, ATR-FTIR, deuterium, oxide, solids, loading, ground

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