基于CFD-DPM模型的高浓度矿浆输送90°弯管冲蚀磨损特性研究  

Erosion and Wear Characteristics of High-Concentration Slurry Conveying 90°Elbow Pipe Based on CFD-DPM Model

作　　者：卜显忠[1] 武栋平 何川[2] 李九洲[2] 李新宏 BU Xianzhong;WU Dongping;HE Chuan;LI Jiuzhou;LI Xinhong(School of Resources Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,Shaanxi,China;Jinduicheng Molybdenum Co.,Ltd.,Xi′an 710077,Shaanxi,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055 [2]金堆城钼业股份有限公司,陕西西安710077

出　　处：《中国钼业》2024年第5期57-64,共8页China Molybdenum Industry

摘　　要：在工况条件较为复杂的矿浆输送管道中,造成管道失效的主要原因是冲蚀磨损。管道中的冲蚀主要发生在典型弯管、变径管等流向或结构发生变化的位置。本文基于CFD-DPM耦合模型,模拟研究了复杂工况下液固两相流中的固体颗粒粒径、矿浆流速、矿浆浓度对某选矿厂矿浆输送管道的90°弯管冲蚀磨损的影响。结果表明:弯管的冲蚀磨损最为严重,90°弯管处的冲蚀磨损速率与矿浆浓度呈线性关系;流速达到5 m/s时90°弯管处的冲蚀磨损速率变化幅度较大;粒径在0.0374~0.0750 mm范围时,90°弯管处的冲蚀磨损速率无明显变化,粒径达到0.150 mm后90°弯管处的冲蚀磨损速率变化幅度较大。研究结果可实现矿浆输送管道冲蚀磨损区域和磨损速率的有效评估,为管道安全运维和寿命预测提供技术依据。In slurry pipelines with complex working conditions,the main cause of pipeline failure is erosion and wear.Erosion in pipelines occurs mainly at locations where the flow direction or structure changes such as typical elbows,reducers.This article is based on the CFD-DPM coupling model to simulate and study the effects of solid particle size,slurry flow rate,and slurry concentration on the erosion and wear of a 90°bend pipe in a slurry conveying pipeline of a certain beneficiation plant under complex operating conditions in liquid-solid two-phase flow.The results showed that the erosion wear of the bent pipe was the most severe,and the erosion wear rate at the 90°bend was linearly related to the slurry concentration;when the flow rate reaches 5 m/s,the erosion and wear rate at the 90°bend changes significantly;when the particle size is in the range of 0.0374~0.0750 mm,there is no significant change in the erosion wear rate at the 90°bend,while the erosion wear rate at the 90°bend changes significantly when the particle size reaches 0.150 mm.This paper can effectively evaluate the erosion wear area and wear rate of slurry transportation pipelines,and provide a technical basis for pipeline safety operation and maintenance and life prediction.

关 键 词：矿浆 数值模拟 弯管 冲蚀磨损 

分 类 号：U173.91[交通运输工程]