Journal ArticleDOI
Enhancement of Rheological Behavior of Indian High Ash Coal−Water Suspension by Using Microwave Pretreatment
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In this paper, rheological characteristics of coal-water slurries by using microwave pretreatment have been presented and detailed experimental investigations were carried out for two high ash Indian coals with 38 and 32% ash content.Abstract:
In this paper, rheological characteristics of coal-water slurries (CWS) by using microwave pretreatment have been presented. Detailed experimental investigations were carried out for two high ash Indian coals with 38 and 32% ash content. Experiments were conducted at the 900 W power level and various exposure times of 30, 60, 90, and 120 s. Before and after treatment, the samples were ground for rheological characteristic of CWS in an online Bohlin viscometer. All slurries were found to exhibit pseudoplastic characteristics and results indicate that the rheological properties of microwave-treated coal are better than untreated coal. The density of microwave-treated coal is less than that of untreated coal after grinding. A factorial plan was used, and empirical equations were obtained and found to be encouraging and highly significant.read more
Citations
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References
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TL;DR: In this article, a critical analysis of the extensive experimental data on the relative viscosity of suspensions of uniform spherical particles was made, and the coefficients of different power series relating relative visco-solutions and volume fraction solids were determined using a nonlinear least squares procedure.
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Microwave energy for mineral treatment processes—a brief review
TL;DR: In this article, a brief account of results generated from microwave-assisted mineral treatments tests is given, which demonstrate that microwave energy has potential in mineral treatment and metal recovery operations such as heating, drying, carbothermic reduction of oxide minerals, leaching, roasting/smelting, pretreatment of refractory gold ore and concentrate, spent carbon regeneration and waste management.
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Effect of coal particle size distribution, volume fraction and rank on the rheology of coal–water slurries
TL;DR: In this article, the effect of coal particle size distributions on the rheology of coal-water slurries (CWS) has been investigated in two different Turkish lignites (Soma and Istanbul-Agacli) and abituminous coal from Siberia (Russia).
Journal ArticleDOI
Slurry rheology in wet ultrafine grinding of industrial minerals: a review
TL;DR: In this article, a semi-empirical model incorporating slurry rheology, solids concentration, particle size and slurry temperature was described, and on-line measurement for the slurry Rheology control was also discussed.
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The effect of chemicals on the viscosity and stability of coal water slurries
TL;DR: In this article, the effects of different chemicals that were used as dispersing agent and stabiliser on the stability and viscosity of coal-water slurries have been investigated.