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

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International Journal of Minerals,Metallurgy and Materials 2023年第8期30卷 1608-1620页

作者： Qiusong Chen Hailong Zhou Yunmin Wang Daolin Wang Qinli Zhang Yikai Liu School of Resources and Safety Engineering Central South UniversityChangsha 410083China Sinosteel Maanshan General Institute of Mining Research Co. Ltd.Maanshan 243000China Department of Geosciences University of Padova35131 PadovaItaly

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 *** wear(EW)remains the main cause of failure in tailings slurry pipeline systems,particularly at *** is a complex phenomenon influenced by numerous factors,but research in this area has been *** study performs numerical simulations of slurry transport at the bend by combining computational fluid dynamics and fluid particle tracking using a wear *** 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 650μm,and bend angle(BA)ranging from 45°to 90°on EW at the bend in terms of particle kinetic energy and incidence *** 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 *** 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 650μm,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 450μm,the maximum EW position is mainly at the outlet of the *** PS is greater than 450μm,the maximum EW position shifts toward the center of the bend with the increase in ***,EW at the bend can be reduced in practice by reducing IV as much as possible and using small particles.

关键词： tailings transportation erosion wear pipe wear CFD numerical simulation

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