摘要
为探明时间因素对于全尾砂膏体管道输送阻力的影响规律,基于宾汉流变模型,结合浆体絮网结构理论,构建了考虑时变特征的五参数膏体流变模型,提出通过膏体恒定剪切率流变测试进行模型参数估算,推导了相应管输阻力的计算模型.以某铅锌矿质量分数为78%的全尾膏体为研究对象,进行了5组恒剪切率流变测试,根据结果对其管输阻力的时间变化过程进行了分析,结果表明：在60~80m3/h的系统流量下,膏体输送阻力随运行时间逐渐降低,最终达到约4.5MPa/km的稳定值,为初始阻力的46%.
Based on the rheological equation of Bingham fluid and the theory of slurry flocculent structure, a 5-parameter time-dependent rheologieal model is established to reveal the time effect on resistance loss in piping transport of total tailings paste. Numerical solution to the re- sistance loss is derived by means of constant shear rate rheological tests. By using the paste （Cw=78%） of a lead-zinc mine, five groups of constant shear rate rheological tests were imple- mented, and the time-varying transport resistance was estimated. The results showed that within a flow of 60~80 m3/h, the transport resistance decreased gradually with operating time before it reached a stable value at 4.5 MPa/km which was 46 % of the initial resistance.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2013年第5期736-740,共5页
Journal of China University of Mining & Technology
基金
国家"十二五"科技支撑计划项目(2012BAB08B02)
教育部长江学者和创新团队发展计划(IRT0950)
国家自然科学基金重点项目(50934002
51104011)
关键词
全尾膏体
流变关系
时变行为
絮网结构
输送阻力
total tailings paste rheological relation time-dependent behavior flocculent struc-ture transport resistance
