中文摘要：

针对云南褐煤,用真空干燥脱水和恒温恒湿箱处理获得了不同含水率的褐煤,在常温常压（t=19.3℃,p=1.01×105Pa）条件下研究了褐煤含水率对油煤浆流变特性的影响。研究表明,原料煤含水率对油煤浆黏度和流变特性有一定的影响。随褐煤含水率增加,油煤浆黏度先减小后增加。油煤浆浓度不同,剪切速率不同,黏度出现最低值的含水率值wmin也不同。浓度为45.45%的油煤浆,剪切速率小于4.4 s^-1时,wmin为9.20%;剪切速率大于4.4 s^-1时,wmin为7.80%。浓度为55.56%的油煤浆,剪切速率小于1.32 s^-1时,wmin为7.40%;剪切速率大于1.32 s^-1时,wmin为10.00%。随剪切速率变化,油煤浆黏度上下行曲线之间形成滞后环,表明油煤浆体系有触变性,并且不同含水率煤浆体系触变性不同,含水率越大,触变性越明显。实验中不同含水率褐煤油煤浆都属于假塑性流体,且含水率对模型参数有一定的影响。

英文摘要：

Yunnan brown coals with different moisture contents were prepared by vacuum-drying and thermostatic and humidistatic treatment, and the effects of moisture on the rheological behavior of brown coal-oil slurries were studied at atmospheric pressure and room temperature（ t= 19.3 ℃, p = 1.01 ×10^5 Pa）. It is found that the moisture contents in raw coals have influences on the rheological properties of brown coal-oil slurries. The viscosity of the slurry decreases first and then increases with the increase in moistuge. The moisture content O.）min at which the lowest viscosity occurs varies with shear rates and coal loadings, tOmin is 9. 20% at the shear stress less than 4.4 s-1 and 7.80% at the shear stress greater than 4.4 s-1 as the coal concentration is 45.45%. ωmin becomes 7.40% at the shear stress less than 1.32 s-1 and 10.00% at the shear stress greater than 1.32 s^-1 as the coal concentration is 55.56%. The thixotropy of brown coal-oil slurries is different for different moisture contents, and is enhanced with the decrease in the moisture contents. Brown coal-oil slurries containing moisture of various contents are pseudoplastic fluid, and the moisture contents also have some effects on the parameters of the rheological model.