尾矿浆输送过程中弯管处的冲蚀磨损数值研究：考虑入口速度、颗粒粒径和弯管角度

陈秋松; 周海龙; 王运敏; 王道林; 张钦礼; 刘一锴

doi:10.1007/s12613-023-2672-z

Volume 30 Issue 8

Aug. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(8): 1608-1620

Qiusong Chen, Hailong Zhou, Yunmin Wang, Daolin Wang, Qinli Zhang, and Yikai Liu, Erosion wear at the bend of pipe during tailings slurry transportation: Numerical study considering inlet velocity, particle size and bend angle, Int. J. Miner. Metall. Mater., 30(2023), No. 8, pp. 1608-1620. https://doi.org/10.1007/s12613-023-2672-z

Cite this article as:

Qiusong Chen, Hailong Zhou, Yunmin Wang, Daolin Wang, Qinli Zhang, and Yikai Liu, Erosion wear at the bend of pipe during tailings slurry transportation: Numerical study considering inlet velocity, particle size and bend angle, Int. J. Miner. Metall. Mater., 30(2023), No. 8, pp. 1608-1620. https://doi.org/10.1007/s12613-023-2672-z

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研究论文

尾矿浆输送过程中弯管处的冲蚀磨损数值研究：考虑入口速度、颗粒粒径和弯管角度

1)
中南大学资源与安全工程学院, 长沙 410083, 中国
2)
中钢集团马鞍山矿山研究总院有限公司, 马鞍山 243000, 中国
3)
帕多瓦大学地球科学学院, 帕多瓦 351313, 意大利

通讯作者:
王道林 E-mail: daolinw@csu.edu.cn

文章亮点

(1) 构建了尾矿浆管道输送过程中弯管的冲蚀磨损数值模型，并验证了模型的可靠性。

(2) 探明了入口速度、颗粒粒径和弯管角度对弯管冲蚀磨损的影响机理、分布规律与影响程度。

(3) 拟合了最大冲蚀磨损速率与三种主要影响因素之间的函数关系。

中文摘要

管道水力运输是一种高效、低能耗的固相运输方式，常用于采矿业中的尾矿浆运输环节。而冲蚀磨损是造成尾矿浆管道系统失效的主要原因，尤其在弯管处。与此同时，管道的冲蚀磨损属于多因素影响下的复杂流固耦合作用，鲜有学者对其进行研究。本文结合计算流体力学，粒子追踪以及冲蚀磨损模型，构建弯管处料浆输送数值模型。在验证该模型可靠性的基础上，从粒子动能和入射角度两个方面重点研究了入口速度（1.5–3.0 m·s^-1）、颗粒粒径（50–650 μm）以及弯管角度（45°–90°）对弯管处冲蚀磨损的影响。结果表明，在给定的参数范围，料浆在弯管处的最大冲蚀磨损速率随着入口速度和颗粒粒径的增加而呈指数级增长，随着弯管角度的增加先增大后减小，转折点为60°。同时，三个因素对弯管的最大冲蚀磨损速率影响程度为颗粒粒径>入口速度>弯管角度。其中，当入口速度为3.0 m·s^-1，颗粒粒径为650 μm，弯管角度为60°时，弯管磨损最为严重，最大冲蚀磨损速率为5.68 × 10^-6 kg·m^-2·s^-1。此外，在颗粒粒径不高于450 μm时，弯管处最大磨损位置在弯管出口附近；颗粒粒径高于450 μm时，弯管处最大磨损位置逐渐由弯管出口向弯管中心偏移。因此，在实际工程中，可以通过降低入口速度、使用较细粒径的尾矿浆来减轻弯管的冲蚀磨损。

关键词:

Research Article

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

+ Author Affiliations

Abstract

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.
- tailings transportation;
- erosion wear;
- pipe wear;
- CFD;
- numerical simulation.

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尾矿浆输送过程中弯管处的冲蚀磨损数值研究：考虑入口速度、颗粒粒径和弯管角度

文章亮点

中文摘要

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

Abstract

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