Erosion wear at the bend of pipe during tailings slurry transportation: Numerical study considering inlet velocity, particle size and bend angle

IF 5.6 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Qiusong Chen, Hailong Zhou, Yunmin Wang, Daolin Wang, Qinli Zhang, Yikai Liu
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引用次数: 8

Abstract

Pipeline hydraulic transport is a highly efficient and low energy-consumption method for transporting solids and is commonly used for tailing slurry transport in the mining industry. Erosion wear (EW) remains the main cause of failure in tailings slurry pipeline systems, particularly at bends. EW is a complex phenomenon influenced by numerous factors, but research in this area has been limited. This study performs numerical simulations of slurry transport at the bend by combining computational fluid dynamics and fluid particle tracking using a wear model. Based on the validation of the feasibility of the model, this work focuses on the effects of coupled inlet velocity (IV) ranging from 1.5 to 3.0 m·s−1, particle size (PS) ranging from 50 to 650 µm, and bend angle (BA) ranging from 45° to 90° on EW at the bend in terms of particle kinetic energy and incidence angle. The results show that the maximum EW rate of the slurry at the bend increases exponentially with IV and PS and first increases and then decreases with the increase in BA with the inflection point at 60° within these parameter ranges. Further comprehensive analysis reveals that the sensitivity level of the three factors to the maximum EW rate is PS > IV > BA, and when IV is 3.0 m/s, PS is 650 µm, and BA is 60°, the bend EW is the most severe, and the maximum EW rate is 5.68 × 10−6 kg·m−2·s−1. In addition, When PS is below or equal to 450 µm, the maximum EW position is mainly at the outlet of the bend. When PS is greater than 450 µm, the maximum EW position shifts toward the center of the bend with the increase in BA. Therefore, EW at the bend can be reduced in practice by reducing IV as much as possible and using small particles.

尾矿浆输运管道弯道处冲蚀磨损:考虑进口速度、粒径和弯道角度的数值研究
管道水力输送是一种高效、低耗能的固体输送方式,是采矿行业中常用的尾矿浆输送方式。冲蚀磨损(EW)仍然是尾矿浆管道系统失效的主要原因,特别是弯道。电子战是一种受多种因素影响的复杂现象,但在这方面的研究还很有限。本研究结合了计算流体力学和流体颗粒跟踪的磨损模型,对弯道处的泥浆输运进行了数值模拟。在验证模型可行性的基础上,研究了进口速度(IV)为1.5 ~ 3.0 m·s−1、粒径(PS)为50 ~ 650µm、弯道角(BA)为45°~ 90°时,颗粒动能和入射角对弯道EW的影响。结果表明:在此参数范围内,料浆在弯道处的最大EW速率随IV和PS呈指数增长,在拐点为60°时随BA的增加先增大后减小;进一步综合分析表明,3个因子对最大电子束速率的敏感性等级为PS >四比;当IV = 3.0 m/s, PS = 650µm, BA = 60°时,弯曲EW最严重,最大EW速率为5.68 × 10−6 kg·m−2·s−1。另外,当PS <等于450µm时,电子束最大位置主要在弯道出口。当PS大于450µm时,随着BA的增大,电子束的最大位置向弯曲中心偏移。因此,在实践中可以通过尽可能减少IV和使用小颗粒来减少弯道处的电子束。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
9.30
自引率
16.70%
发文量
205
审稿时长
2 months
期刊介绍: International Journal of Minerals, Metallurgy and Materials (Formerly known as Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material) provides an international medium for the publication of theoretical and experimental studies related to the fields of Minerals, Metallurgy and Materials. Papers dealing with minerals processing, mining, mine safety, environmental pollution and protection of mines, process metallurgy, metallurgical physical chemistry, structure and physical properties of materials, corrosion and resistance of materials, are viewed as suitable for publication.
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