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Journal Article

Rheological properties of coal ash at high temperatures

31 Oct 2012-Journal of Fuel Chemistry and Technology (燃料化学学报)-Vol. 40, Iss: 10, pp 1167-1171
TL;DR: Wang et al. as discussed by the authors used a rotational viscometer to study the effect of shear rate on the shear stress and viscosity of coal ash and found that coal ash slag falls into a Newtonian fluid when the temperature is above the liquidus temperature.
About: This article is published in Journal of Fuel Chemistry and Technology.The article was published on 2012-10-31 and is currently open access. It has received 2 citations till now. The article focuses on the topics: Coal & Fly ash.
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TL;DR: In this article, a comprehensive model has been developed to simulate a multiphase flow and reaction process within the spatial region and refractory wall, and is applied to a study on the multi-phase flow characteristics of a single-burner entrained-flow gasifier.

24 citations

Journal ArticleDOI
TL;DR: In this paper, the rheological properties of a CaO-SiO2-Al2O3-MgO-TiO2−(TiC) blast furnace (BF) slag system were analyzed using a high-temperature rheometer to reveal the non-Newtonian behavior of heterogeneous titanium-bearing molten slag.
Abstract: Experimental studies on the rheological properties of a CaO–SiO2–Al2O3–MgO–TiO2–(TiC) blast furnace (BF) slag system were conducted using a high-temperature rheometer to reveal the non-Newtonian behavior of heterogeneous titanium-bearing molten slag. By measuring the relationships among the viscosity, the shear stress and the shear rate of molten slags with different TiC contents at different temperatures, the rheological constitutive equations were established along with the rheological parameters; in addition, the non-Newtonian fluid types of the molten slags were determined. The results indicated that, with increasing TiC content, the viscosity of the molten slag tended to increase. If the TiC content was less than 2wt%, the molten slag exhibited the Newtonian fluid behavior when the temperature was higher than the critical viscosity temperature of the molten slag. In contrast, the molten slag exhibited the non-Newtonian pseudoplastic fluid characteristic and the shear thinning behavior when the temperature was less than the critical viscosity temperature. However, if the TiC content exceeded 4wt%, the molten slag produced the yield stress and exhibited the Bingham and plastic pseudoplastic fluid behaviors when the temperature was higher and lower than the critical viscosity temperature, respectively. When the TiC content increased further, the yield stress of the molten slag increased and the shear thinning phenomenon became more obvious.

9 citations


Cites methods from "Rheological properties of coal ash ..."

  • ...Some constitutive equation models, such as the Bingham, Ellis, Carreau, Casson, Ostwaldde Wale, and Herschel–Bulkley models, are used to describe the rheological properties of the fluid [11]....

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