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ISSN: 2157-7048

Journal of Chemical Engineering & Process Technology
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Research Article

Rheology and Viscosity Prediction of Bituminous Coal Slag in Reducing Atmosphere

Feng Zhao, Jie Xu, Wei Huo, Fuchen Wang and Guangsuo Yu*
Key Laboratory of Coal Gasification, Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai, PR China
Corresponding Author : Guangsuo Yu
Key Laboratory of Coal Gasification
Ministry of Education
Shanghai Engineering Research Center of Coal Gasification
East China University of Science and Technology
Shanghai 200237, PR China
Tel: 862164252974
E-mail: [email protected]
Received September 02, 2015; Accepted September 16, 2015; Published September 23, 2015
Citation: Zhao F, Xu J, Huo W, Wang F, Yu G (2015) Rheology and Viscosity Prediction of Bituminous Coal Slag in Reducing Atmosphere. J Chem Eng Process Technol 6:243. doi:10.4172/2157-7048.1000243
Copyright: © 2015 Zhao F, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

The high-temperature rheology of bituminous coal slag in the reducing atmosphere was investigated in this study. The characteristics of slag sample were analyzed by multi-techniques. The rheological measurement of the slag was carried out by a high-temperature rheometer at temperatures of 1360-1460℃. The effects of the shear rate and temperature on the rheological property of the slag were studied. The volume fractions of crystallize particles and mineral matters variation were predicted by thermodynamic software FactSage. The results show that the viscosity and shear stress of the slag increase with decreasing temperature at the constant shear rate. When the volume fraction of the crystallize particles is less than 10%, the slag behaves as a Newtonian fluid. When the volume fraction of the crystallize particles is more than 15%, the slag viscosity decreases with increasing shear rate. The non-Newtonian fluid behavior of slag is illustrated by shear thinning behavior and thixotropic behavior. With decreasing temperature, the shear thinning behavior becomes increasingly significant. In addition, the viscosity prediction model basing on S2 model and Einstein-Roscoe model was established.

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