陕西科技大学学报2017，Vol.35Issue(6)：1-5,5.
高温高浓竹浆黑液流变性及膨胀性研究
Study on rheological properties and expansion of thick bamboo kraft black liquor at high temperature
摘要
Abstract
It is necessary to study the rheological properties of black liquor at a high solid con-tent above 70 w t% due to the development of new technology for the recovery unit in pulp and paper industry.Adding sodium aluminate can ensure high efficiency in the method of black liquor combustion to remove silicon.Nevertheless,the effect of sodium aluminate on the expansion of black liquor should not be ignored.The rheological properties of thick bam-boo kraft black liquor (70.19 wt% and 79.87 wt% ) at different temperatures (70 ℃ and 98℃) were investigated by an AR2000ex rotational rheometer.The results proved that the flowability of the bamboo kraft black liquor obeyed the law of pseudoplastic fluid in the shear rate range of 0~100 s-1.Thick bamboo kraft black liquor represented strong elastic solid properties.The apparent viscosity of black liquor could be reduced effectively with the in-crease of temperature.High temperature also weakened the pseudoplastic characteristics of black liquor,as well as the intensity of the molecular structure of black liquor.Therefore,it was benefit for the transportation of black liquor.As an indication of expansion of black liq-uor,the volumetric isothermal expansivety (VIE ) reached the maximum value w hen the loading of sodium aluminate was 0.5 wt%.The expansion of the black liquor would be sup-pressed if the loading was increased continued.关键词
黑液/流变特性/假塑性/膨胀性Key words
black liquor/rheological properties/pseudoplastic/expansion分类
资源环境引用本文复制引用
岳小鹏,杜鑫,徐永建..高温高浓竹浆黑液流变性及膨胀性研究[J].陕西科技大学学报,2017,35(6):1-5,5.基金项目
国家十二五科技支撑计划项目(2012BAD23B02) （2012BAD23B02）
陕西科技大学学术带头人团队基金项目(2013XSD25) （2013XSD25）
