文献类型：期刊文献

中文题名：煤粉剪切特性及其影响因素分析

英文题名：Shear Performance of Pulverized Coal and Its Influencing Factors

作者：吴福玉[1];陆海峰[1];郭晓镭[1];龚欣[1]

机构：[1]华东理工大学煤气化及能源化工教育部重点实验室,上海200237

年份：2014

卷号：40

期号：4

起止页码：421

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：中国博士后科学基金资助项目(2012M520847);国家自然科学基金项目(21206041);中央高校基本科研业务费专项资金资助

语种：中文

中文关键词：煤粉;剪切特性;剪切速率;屈服轨迹;预压应力

外文关键词：pulverized coal; shear properties; shear velocity; yield locus; preconsolidation stress

摘要：为了研究煤粉的剪切特性及其影响因素,借助ShearTrac-Ⅱ剪切系统,获得了煤粉的屈服轨迹,并将煤粉与典型粉体玻璃微珠的剪切特性进行了比较,分析表明煤粉更难剪切,因此重点研究了剪切速率、剪切位移和预压应力对煤粉剪切特性的影响。Jenike剪切标准D6128-00的剪切速率范围（1-3mm/min）对煤粉介质依然适用,在此范围内可适当提高剪切速率以节省测试时间;为确保煤粉介质达到剪切峰值并进入稳态区,剪切位移设计应不小于8mm。此外,煤粉内聚力和流动指数随着预压应力的增加而增大,应根据实际应用选择与其相对应的预压应力范围。
To investigate the shear performance of pulverized coal and its influencing factors, the yield locus of pulverized coal were obtained by ShearTrac Ⅱ system. Shear characteristics of pulverized coal and typical powder glass beads were compared. The results show that shearing of pulverized coal is more difficult. Furthermore, the effects of shear velocity, shear displacement and preconsolidation stress on shear characteristics are determined, indicating that the recommended shear velocity （D6128-00）, ranging from 1 mm/min to 3 mm/min, is available for pulverized coal. The increasing shear velocity during this range has little effect on the stress measurements but saves test time. To ensure achieving the peak value and the steady state region of shear stress, the shear displacement should be more than 8 mm. The cohesion and flow index increased gradually with the rising preconsolidation stresses, thus, the selection of which should be based on the intended application.