摘要
尾砂膏体是高浓度料浆,表现出复杂的触变性。本研究通过一系列恒剪切速率实验研究了尾砂膏体的稳态和瞬态触变性行为。基于ZHANG等提出的触变性模型分析了固体浓度对尾砂膏体触变性的影响,建立了基于固体浓度的稳态流变参数经验模型,提出了描述固体浓度对瞬态屈服应力影响的时变性模型。上述模型实现了浓度影响下尾砂膏体稳态和瞬态剪切应力时变性演化的定量分析。
Tailings pastes are high-concentration mixtures and exhibit complex thixotropy. This study is to investigate the equilibrium and transient thixotropic behaviours of tailings pastes via a series of constant shear rate tests. The thixotropic model proposed by ZHANG et al is utilized to analyze the effect of solids concentration on thixotropy of tailings pastes.The empirical functions that represent the relationship between equilibrium rheological parameters and solids concentrations is proposed. Meanwhile, a time-dependent model is established to characterize the effect of solids content on the transient shear stress. These functions enable the quantitative analysis of concentration-dependent equilibrium and transient stress evolution for tailings pastes.
作者
张连富
王洪江
ZHANG Lian-fu;WANG Hong-jiang(School of Mining Engineering,Anhui University of Science and Technology,Huainan 232001,China;Anhui Engineering Research Center of Exploitation and Utilization of Closed/Abandoned Mine Resources,Anhui University of Science and Technology,Huainan 232001,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)
基金
Project(51834001) supported by the National Natural Science Foundation of China
Project(2022yjrc59) supported by the Scientific Research Foundation for High-level Talents of Anhui University of Science and Technology,China
Project(EUCMR202208) supported by the Open Project Program of Anhui Engineering Research Center of Exploitation and Utilization of Closed/abandoned Mine Resources,China
Project supported by the China Scholarship Council。
关键词
尾砂膏体
触变性
稳态
瞬态
固体浓度
tailings paste
thixotropy
equilibrium
transient state
solids concentration
