摘要
非牛顿流体在管道输送时其流变特性是管道工艺设计的主要依据。基于管流法的流变测试原理,分析已有浓密膏体流变特性测试实验台优缺点,取长补短对其实施改进。采用液压系统代替气压方式推送物料实现管道输送,以"稳流量测压差"代替"定压力测流量"的方式获取关键参数,以此推算浓密膏体的流变特性,为浓密膏体的管道输送工艺设计提供新实验平台。以赤泥为例进行实验验证,确定了67.5%～68.5%浓度赤泥不同管径输送下的流变模型。测量过程表明本实验台可行且操作方便、数据可靠;原始实验数据及其处理结果符合理论规律。
In order to measure the rheological characteristic of high concentration and viscous industry dense paste waste, a kind of non-Newtonian fluid, and help designing the transport pipelines definitely, a new rheological test system based on the principles of pipe flow type with better performance is introduced in this paper. Instead of ＂measuring the corresponding flow rate under fixed pressure value＂, a manner called ＂measuring the corresponding pressure when flow rate is kept stable at different values＂ is used in the new system. Besides, the system is driven by a well controlled hydraulic pressure system. At the end, the rheological equations for red mud with a concentration of 67.5%～68.5% when transported by the pipelines with different diameters are decided using the new rheological test system. Test results prove that the new system is useful and reliable. Also the acquired data, original or processed, are in accordance with the authoritative theoretic description.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2009年第8期1646-1650,共5页
Chinese Journal of Scientific Instrument
基金
科技部科技型创新基金(20021104021799)
教育部博士点专项基金(2002029001)资助项目
关键词
非牛顿流体
管流法
浓密膏体
流变特性
管道输送
压差
赤泥
non-Newtonian fluid
pipe flow type
dense paste
rheological characteristic
pipeline transportation
corresponding pressure
red mud
