Determination of Rheological Model and Rheological Property Investigation of Coal Water Slurry

摘要：

The Haake rheometer was used to determine the rheological property of Coal Water Slurry (CWS) made up from Datong coal, and the obtained rheological curves were fitted using Power-law, Binghamplastic, Herschel-Bulkley, Casson, Sisko models respectively. The fitted parameters indicated that the Herschel-Bulkley model has the maximum correlation coefficient of all the rheological models, so the Herschel-Bulkley model was used to determine the rheological property of the experimentally prepared CWS. The correlated parameters for Herschel-Bulkley model were used to study the effect of coal concentration, dispersant dosage and electrolyte addition on rheological property of CWS. The results showed that the CWS with higher coal concentration tend to be pseudoplastic fluid, while the CWS prepared using excessive dispersant show shear-thickening flow characteristic. The addition of high-valence cationic electrolyte increase the yield value and pseudoplastic behavior of CWS, while th addition of anionic adjusting agent decrease the yield value of CWS, and the CWS tend to be shear-thickening flow characteristic.

关键词： rheological property rheological model Herschel-Bulkley coal water slurry dispersant

作者: ZHOU Mingsong QIU Xueqing YANG Dongjie LOU Hongming

作者单位: School of Chemical and Energy Engineering, Guangdong Provincial Laboratory of Green Chemical Technology,South China University of Technology, Guangzhou 510640, Guangdong, China

会议类型: 国际会议

会议名称: 第四届中日化工学术研讨会(The 4th Joint China/Japan Chemical Engineering Symposium)(CJCES)

会议地点: 成都

会议语种:英文

在线出版日期: 2007-12-19（万方平台首次上网日期，不代表论文的发表时间）