考虑时变性的全尾膏体管输阻力计算  

Calculation of resistance in total tailings paste piping transportation based on time-varying behavior

作　　者：吴爱祥[1] 刘晓辉[1] 王洪江[1] 焦华喆[1] 李辉[1] 刘斯忠[1] 

机构地区：[1]北京科技大学土木与环境工程学院金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《中国矿业大学学报》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)

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.

关 键 词：全尾膏体 流变关系 时变行为 絮网结构 输送阻力 

分 类 号：X753[环境科学与工程—环境工程]