Role of particle size on the cohesive behavior of limestone powders at high temperature

The Sevilla Powder Tester: A Tool for Measuring the Flow Properties of Cohesive Powders at High Temperatures

“…8). In the case of limestone, no deformations of the surface of the particles were appreciable after the samples (either silica coated or uncoated) were subjected to the high temperature fluidization cycles (Espin et al, 2020). These findings can be qualitatively explained by the change in the mechanical properties of the material as affected by temperature, particularly its hardness, which decreases significantly with temperature (Michel et al, 2004;Wheeler and Michler, 2013;Zhang et al, 2017) yielding an increase of the tensile strength as predicted by contact mechanics (Castellanos, 2005) when the particles deform plastically at contact points.…”

“…7). The results reported by Espin et al (2020) revealed that powder flowability is critically influenced by particle size as depending on temperature. As it is clear from Fig.…”

“…The CaL process involves storing and handling CaCO 3 / CaO powders at high temperatures and consolidations (Paksoy, 2007). As it has been shown in the works reviewed above (Durán-Olivencia et al, 2021;Espin et al, 2020), the increase of temperature rises the cohesiveness of the powders which could be a serious restraint to their flowability. The results shown in Figs.…”

“…Table A1 Mechanical properties of the material tested, reprinted with permission from Ref. (Espin et al, 2020 References: a (data provided by the supplier), b (Crystran, 2020;Daniel et al, 1982;Ghadami Jadval Ghadam, 2015;Gunda and Volinsky, 2011;Gupta, 2010;Lee et al, 2016;Shi et al, 2018;Surfacenet, 2020) c (Gunda and Volinsky, 2011;Hubermaterials, 2020;Lee et al, 2016;Matweb, 2020;Shi et al, 2018) d (Daniel et al, 1982;Gunda and Volinsky, 2011;Gupta, 2010;Lomboy et al, 2011;Materialsproject, 2020;Ramlakhan et al, 2000;Upadhyay, 2013) e (Røyne et al, 2011;Santhanam. and Gupta, 1968) Authors' Short Biographies…”

“…Fig.2Dimensionless pressure drop Δp/W vs the gas flow rate q m for CaCO 3 powder samples (average particle size d p = 88.02 ± 0.7 μm, T = 500 °C) previously subjected to different consolidation stresses σ c as indicated. Reprinted with permission from Ref (Espin et al, 2020)…”