Modeling ore degradation during handling using continuum damage mechanics

被引：33
作者：
Tavares, Luis Marcelo [1 ]
de Carvalho, Rodrigo M. [1 ]
机构：
[1] Univ Fed Rio de Janeiro, COPPE, Dept Met & Mat Engn, BR-21941972 Rio De Janeiro, Brazil
来源：
INTERNATIONAL JOURNAL OF MINERAL PROCESSING | 2011年 / 101卷 / 1-4期
关键词：
Degradation; Handling; Modeling; Particle breakage; PARTICLE FRACTURE; BREAKAGE;
D O I：
10.1016/j.minpro.2010.07.008
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Degradation of steelmaking materials during handling causes a significant economic impact, given the higher prices achieved by lump ore in comparison to finer products. It is relevant to model the amenability of ores to degradation, since it may be used to simulate the response of ores to different sequences of handling and transportation events from mine to port. The paper presents a mechanistic model to describe degradation caused by transfers and drops of particulate materials. The model is based on damage mechanics and the distribution of fracture energies of the original particles, using data collected in impact load cell and tumbling tests. This model, which is capable of predicting the proportion of particles broken and the entire size distribution resulting from any sequence of drops, has been validated at a preliminary level using data from drop tests of a Brazilian iron ore. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：21 / 27
页数：7
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