Abstract
The Albany Research Center (ARC) conducted studies of mechanical activation by conventional and ultrafine grinding techniques to enhance olivine reactivity in mineral carbonation reactions. Activated olivine is one of several solid feed materials used at ARC in reactions with carbon dioxide toform carbonate minerals. This paper compares grinding techniques via energy demand data and product characteristics, including particle size distributions, surface areas, full-width-at-half-maximum (FWHM) XRD analyses, and particle morphology by SEM analyses. Reactivity was calculated by percent conversion to carbonate in subsequent carbonation tests. Particle size reduction has the greatest impact on reactivity, and wet grinding is more energy efficient than dry grinding. Large additional inputs of energy to increase surface area or reduce crystallinity do not result in proportional improvements in reactivity.
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Preprint number 04-093, presented at the SME Annual Meeting, Feb. 23–25, 2004, Denver, Colorado. Discussion of this peer-reviewed and approved paper is invited and must be submitted to SME Publications Dept. prior to Feb. 28, 2006.
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Summers, C.A., Dahlin, D.C., Rush, G.E. et al. Grinding methods to enhance the reactivity of olivine. Mining, Metallurgy & Exploration 22, 140–144 (2005). https://doi.org/10.1007/BF03403128
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DOI: https://doi.org/10.1007/BF03403128