【摘 要】
：
用分形理论能描述具有强烈非线性特征的煤粉孔隙结构,利用氮吸附仪分析得到10种煤样的孔隙分形维数为2.572～2.722,利用Haake黏度计测量水煤浆黏度,讨论了孔隙分形、水分、氧量
【基金项目】
：
国家重点基础研究发展计划(973计划)
论文部分内容阅读
用分形理论能描述具有强烈非线性特征的煤粉孔隙结构,利用氮吸附仪分析得到10种煤样的孔隙分形维数为2.572～2.722,利用Haake黏度计测量水煤浆黏度,讨论了孔隙分形、水分、氧量和可磨性指数等对水煤浆性质的影响规律,得到相关的拟合经验公式.当分形维数由2.61增大到2.643和2.698时,不同煤粉制得水煤浆的最高浓度由70.8%降低到69.2%和62.4%,而相应在剪切速率20S-1时表观黏度则由879mPa·s升高到1900和2006mPa·s.说明随着不同煤粉的孔隙分形维数增加,比表面积和孔容积增大,导致水煤浆黏度升高和浓度降低,对成浆特性造成不利影响:而随着煤粉内在水分增加、氧量增加和可磨性指数减小,煤粉的成浆特性变差.
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