基于离散元法的高炉原料摩擦系数与休止角关系的数值分析

Numerical Analysis of the Relationship between Friction Coefficient and Repose Angle of Blast Furnace Raw Materials by Discrete Element Method.

作者信息

Wei Shiyu, Wei Han, Saxen Henrik, Yu Yaowei

机构信息

State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200240, China.

Process and Systems Engineering Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Henriksgatan 8, FI-20500 Åbo, Finland.

出版信息

Materials (Basel). 2022 Jan 25;15(3):903. doi: 10.3390/ma15030903.

DOI:10.3390/ma15030903

PMID:35160849

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8839813/

Abstract

In recent years, the discrete element method (DEM) has been widely used to study the factors affecting the repose angle and calibrate particle parameters for simulations. In this paper, DEM is used to study the effects of the coefficient of rolling and static friction of pellet, sinter and coke particles on the repose angle. By comparison of the results of simulations and physical experiments, the coefficients of rolling and static friction suitable for simulation work are determined. The results demonstrate that repose angle increases with the coefficient of rolling and static friction, but the rate of increase gradually decays, when the coefficient of rolling friction exceeds 0.4 or the coefficient of static friction exceeds 0.35. The coefficient of static friction has a greater impact on the repose angle than the coefficient of rolling friction. The rougher of the base surface, the larger the repose angle of the formed particle piled. It can be concluded that appropriate coefficient of rolling and static friction for simulations can be obtained by the outlined procedure.

摘要

近年来，离散元法（DEM）已被广泛用于研究影响休止角的因素，并校准用于模拟的颗粒参数。本文利用离散元法研究了球团矿、烧结矿和焦炭颗粒的滚动摩擦系数和静摩擦系数对休止角的影响。通过模拟结果与物理实验结果的比较，确定了适合模拟工作的滚动摩擦系数和静摩擦系数。结果表明，休止角随滚动摩擦系数和静摩擦系数的增加而增大，但当滚动摩擦系数超过0.4或静摩擦系数超过0.35时，增大速率逐渐衰减。静摩擦系数对休止角的影响比滚动摩擦系数更大。底面越粗糙，形成的颗粒堆积体的休止角越大。可以得出结论，通过所述程序可以获得适合模拟的滚动摩擦系数和静摩擦系数。