Experimental Investigation on Flow Behavior of Paste Slurry Transported by Gravity in Vertical Pipes

被引:9
|
作者
Wang, Jiandong [1 ,2 ,3 ]
Wu, Aixiang [1 ,3 ]
Wang, Mi [4 ]
Ruan, Zhuen [1 ,2 ,3 ]
机构
[1] Univ Sci & Technol Beijing, Key Lab, Minist Educ Efficient Min & Safety Met Mines, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Shunde Innovat Sch, Foshan 528399, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
[4] Univ Leeds, Sch Chem & Proc Engn, Leeds LS2 9JT, W Yorkshire, England
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
paste slurry; vertical pipe; flow regime; axial velocity; pressure; ELECTRICAL-RESISTANCE TOMOGRAPHY; PRESSURE-DROP; 2-PHASE FLOW; BACKFILL; LIQUID; VELOCITY; ERT; TAILINGS; SYSTEM;
D O I
10.3390/pr10091696
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In order to dispose of large quantities of mineral tailings, paste backfill is proposed and widely adopted. Paste backfill, which has high concentration and yield stress and behaves as a non-Newtonian fluid, is prepared at the surface plant and then transported underground. Vertical pipelines are more likely to suffer various failures, such as pipe breaks, wear and plugging, during the transport process. Few present studies focus on the flow behavior of paste slurry flowing in vertical pipes. In this work, two L-shaped pipeline systems with internal diameters (ID) of 40 mm and 65 mm with electrical resistance tomography (ERT) were manufactured to visualize flow regimes and measure the axial velocity and pipe pressure of slurry flowing in the upper and lower zones of vertical pipes. Flow regimes were extracted from ERT-reconstructed images stacked by time-series. Based on this, four typical flow regimes were summarized, and the characteristics of velocity and pressure change with vertical pipe depth were discussed.
引用
收藏
页数:17
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