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Citation: YUAN Hai-ping, LIANG Qin-feng, LIU Hai-feng, GONG Xin. Rheological properties of coal ash at high temperatures[J]. Journal of Fuel Chemistry and Technology, ;2012, 40(10): 1167-1171. shu

Rheological properties of coal ash at high temperatures

1.
Key Laboratory of Coal Gasification of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

Corresponding author: GONG Xin,
Received Date: 13 December 2011
Available Online: 23 February 2012
Fund Project: 国家自然科学基金(21106046) (21106046) 国家重点基础研究发展规划(973计划, 2010CB227005) (973计划, 2010CB227005) 国家高技术研究发展计划(863计划, 2008AA05031)。 (863计划, 2008AA05031)

Four coal samples including Shenmu coal from Shaanxi, Nalingou coal from Inner Mongolia, Yangchangwan coal from Ningxia and Nantun coal from Shandong were prepared for the research on the rheological properties of coal ash at high temperatures. The high temperature rotational viscometer was used to study the effect of shear rate on the shear stress and viscosity of coal ash. The results indicate that the coal ash slag falls into a Newtonian fluid when the temperature is above the liquidus temperature, while it gradually turns into non-Newtonian fluid when the temperature is below the liquidus temperature. Shenmu and Yangchangwan coal ash owns the plastic and shear-thicking characteristics, while Nalingou and Nantun coal ash has the pseudoplastic and shear-thinning characteristics. Meanwhile, the crystals are formed with the decrease of temperature, which makes the yield stress increase and the flowability of coal ash slag decrease.
- coal ash,
- viscosity,
- rheological properties,
- yield stress
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