Simulation of long-distance pipeline transportation properties of whole-tailings paste with high sliming

Abstract

Based on Bingham rheological model, a three-dimensional numerical simulation model for long-distance pipeline transportation is established by computational fluid dynamics (CFD) to study the pipeline transportation properties of high sliming paste from a copper mine in China. Based on the rheological properties test, the pressure and velocity of pipeline and elbow are simulated by CFD under different mass concentrations and different stowing capacities. The results show that the pipeline resistance of whole-tailings paste with high sliming while without pumping agent is much higher than that with high sliming and pumping agent at the same mass concentration, and the pipeline resistance of whole-tailings paste with high sliming while without pumping agent is much higher than that with low sliming while without pumping agent. It is very important to add pumping agent to whole-tailings paste with high sliming, and the resistance changes with mass concentration and stowing capacity at the same cement-to-sand ratio of 1:5 and tailings-to-waste ratio of 6:1. However, the change is just limited, that is to say, the paste transportation system is of good stability. Furthermore, at the elbow, the maximum pressure and velocity transfer to the outside of the pipe from the inside. However, lubricating layer is formed at the pipe wall because of high content of fine particles in whole-tailings paste, which will protect the elbow from abrasion. CFD provides an intuitive and accurate basis for pipeline transportation study, and would have a wider application space in the study of paste rheological properties and resistance reduction methods.

Keywords

high sliming / whole-tailings paste / long-distance transportation / computational fluid dynamics

References

[1] WuA-x, WangY, WangH-jiang. Status and prospects of the paste backfill technology [J]. Metal Mine, 2016, 45(7): 1-9

[2] ChenX, ShiX-z, ZhouJ, QiuX-y, LiuX-fei. CFD simulation of transportation properties of W type and long distance pipeline for foam slurry backfilling [J]. Chinese Journal of Nonferrous Metals, 2016, 26(8): 1782-1793

[3] CowperS N T, CowperJ N T, ThomasA D. Slurry Pipelines: Past, present and future [J]. Australian Journal of Multi-Disciplinary Engineering, 2009, 7(2): 189-196

[4] LiuX-h, WangG-l, ZhaoZ-b, WangS-yong. Study on the flow resistance characteristics of structure fluid backfilling slurry based on loop pipe testing [J]. China Molybdenum Industry, 2016, 40(5): 20-23

[5] ZhangX-x, QiaoD-pan. Simulation and experiment of pipeline transportation of high density filling slurry with coarse aggregates [J]. Chinese Journal of Nonferrous Metals, 2015, 25(1): 258-267

[6] WuA-x, LiuX-h, WangH-j, WangY-m, JiaoH-z, LiuS-zhong. Resistance characteristics of structure fluid backfilling slurry in pipeline transport [J]. Journal of Central South University: Science and Technology, 2014, 45(12): 4325-4330

[7] SongJ T, ShinJ H. Rheological properties of cement pastes containing mineral admixtures and superplasticizer [J]. Journal of the Korean Ceramic Society, 2005, 42(11): 737-742

[8] YouC D, ByunS H, SongJ T. Rheological properties of cement paste containing ultrafine blast furnace slag [J]. Journal of the Korean Ceramic Society, 2007, 44(8): 430-436

[9] ZhangQ-l, ChenQ-s, WangX-min. Cemented backfilling technology of paste-like based on aeolian sand and tailings [J]. Minerals, 2016, 6(4): 132-141

[10] WeiC, WangX-m, ZhangY-h, ZhangQ-li. Paste-like cemented backfilling technology and rheological characteristics analysis based on jigging sands [J]. Journal of Central South University, 2017, 24(1): 155-167

[11] MikanovicN, JolicoeurC. Influence of super plasticizers on the rheology and stability of limestone and cement pastes [J]. Cement & Concrete Research, 2008, 38(7): 907-919

[12] JayasreeC, KrishnanJ M, GettuR. Influence of superplasticizer on the non-Newtonian characteristics of cement paste [J]. Materials and Structures, 2011, 44(5): 929-942

[13] OuattaraD, YahiaA, MbonimpaM, BelemT. Effects of superplasticizer on rheological properties of cemented paste backfills [J]. International Journal of Mineral Processing, 2017, 161(4): 28-40

[14] PapoA, PianiL, RicceriRRheological properties of very high-strength portland cement pastes: Influence of very effective superplasticizers [EB/OL], 2010

[15] WangS-y, WuA-x, YinS-h, HanB, WangH-jiang. Influence factors of pressure loss in pipeline transportation of paste slurry [J]. Chinese Journal of Engineering, 2015, 37(1): 7-12

[16] YuY, ChengK, PangBo. Rheological properties of high concentration cemented backfilling slurry [J]. Electronic Journal of Geotechnical Engineering, 2016, 21(7): 1611-1620

[17] SenapatiP K, MishraB K. Feasibility studies on pipeline disposal of concentrated copper tailings slurry for waste minimization [J]. Journal of the Institution of Engineers, 201617

[18] YaoZ-liang. Application and prospect of structural fluid cemented filling technology [J]. Mining Research and Development, 2016, 10: 39-45

[19] WuA-x, LiuX-h, WangH-j, WangY-m, JiaoH-z, LiuS-zhong. Resistance characteristics of structure fluid backfilling slurry in pipeline transport [J]. Journal of Central South University (Science and Technology), 2014, 45(12): 4325-4330

[20] WuA-x, ChengH-y, WangY-m, WangH-j, LiuX-h, LiG-cheng. Transport resistance characteristic of paste pipeline considering effect of wall slip [J]. The Chinese Journal of Nonferrous Metals, 2016, 26(1): 180-187

[21] IhleC F. The least energy and water cost condition for turbulent, homogeneous pipeline slurry transport [J]. International Journal of Mineral Processing, 2016, 148: 59-64

[22] HurtadoJ P, AcuñaE I. CFD analysis of 58 Adit main fans parallel installation for the 2015–2019 underground developments of the new level mine project [J]. Applied Thermal Engineering, 2015, 90(4): 1109-1118

[23] WangX-m, ZhaoJ-w, XueJ-h, YuG-feng. Features of pipe transportation of paste-like backfilling in deep mine [J]. Journal of Central South University of Technology, 2011, 18(5): 1413-1417

[24] DengD-q, ZhuY-j, WangF-z, WangL, YuW-jian. Transportation numerical simulation of filling slurry in long distance pipeline [J]. Journal of Anhui University (Nature Science Edition), 2012, 36(6): 36-43

[25] WuD, CaiS-j, YangW, WangW-x, WangZhang. Simulation and experiment of backfilling pipeline transportation of solid-liquid two-phase flow based on CFD [J]. Chinese Journal of Nonferrous Metals, 2012, 22(7): 2133-2140

[26] KaushalD R, ThinglasT, TomitaY, KuchiiS, TsukamotoH. CFD modeling for pipeline flow of fine particles at high concentration [J]. International Journal of Multiphase Flow, 2012, 43: 85-100

[27] ChenL-y, DuanY-f, PuW-h, ZhaoC-sui. CFD simulation of coal-water slurry flowing in horizontal pipelines [J]. Korean Journal of Chemical Engineering, 2009, 26(4): 1144-1154

[28] ChenQ-s, ZhangQ-l, WangX-m, XiaoC-c, HuQing. A hydraulic gradient model of paste-like crude tailings backfill slurry transported by a pipeline system [J]. Environmental Earth Sciences, 2016, 75(14): 1099

[29] BandyopadhyayT K, DasS K. Non-Newtonian liquid flow through small diameter piping components: CFD analysis [J]. Journal of the Institution of Engineers, 2016, 5: 1-11

[30] XingP, YangX-x, WangH-j, ZhouF-l, WangS-y, ChuY-sha. Research on flocs selection of tailings with high sliming in Baishitamu copper mine [J]. Modern Mining, 2016, 349-52

[31] PopescuM E. An introduction to geotechnical engineering [J]. Engineering Geology, 1981, 22(4): 377-377

[32] ClaytonS, GriceT G, BogerD V. Analysis of the slump test for on-site yield stress measurement of mineral suspensions [J]. International Journal of Mineral Processing, 2003, 70(1–4): 3-21

[33] ZhangQ-l, LiuQ, ZhaoJ-w, LiuJ-gang. Pipeline transportation characteristics of filling paste-like slurry pipeline in deep mine [J]. The Chinese Journal of Nonferrous Metals, 2015, 25(11): 3190-3195

[34] KurniaJ C, SasmitoA P, MujumdarA S. CFD simulation of methane dispersion and innovative methane management in underground mining faces [J]. Applied Mathematical Modelling, 2014, 38(14): 3467-3484

[35] WangX-m, DingD-q, WuY-b, ZhangQ-l, LuY-zhe. Numerical simulation and analysis of paste backfilling with piping transport [J]. China Mining Magazine, 2006, 15(7): 57-59

[36] MaS, WangX-d, WuJ-d, LengT-t, MaJ, JiangDi. Study on resistance loss characteristics of iron concentrate pipeline transportation [C]. Control and Decision Conference, 201520372041

[37] WuA-x, WangH-jiangTheory and technology of metal cemented paste backfill [M], 2015, Beijing, Science Press: 331347

[38] LandriaultD. Paste backfill mix design for Canadian underground hard rock mining [C]. 97th Annual General Meeting of CIM, Rock Mechanics and Strata Control Session, 1995229238