黄金科学技术 ›› 2023, Vol. 31 ›› Issue (2): 323-330.doi: 10.11872/j.issn.1005-2518.2023.02.096
Shuhao HAO1(),Gaipin CAI1,2(),Cheng YU1,Huiming CHEN1
摘要:
为研究某矿石(硅质岩)准静态加载破碎特性,在压筒加载试验的基础上,利用Tavares破碎模型建立了矿石颗粒群破碎模型,对比分析了压筒加载试验与破碎仿真的破碎过程及特征。结果表明:(1)随着加载压力的增加,矿石颗粒群的破碎主要划分为3个阶段:紧密阶段,矿石颗粒群的空隙率减少,逐渐形成几个较为可靠的接触点,基本不会发生矿石颗粒的破碎;破碎阶段,矿石颗粒之间更加密实,矿石之间接触点的受力增大,部分矿石发生破碎;结团阶段,矿石颗粒被压实而产生大量细粉颗粒,进而发生结团现象。(2)在最大加载压力为400 kN的情况下,随着窄粒级(2 mm范围)矿石入料粒度的减小,碎后小颗粒的占比更高,不同入料粒径对破碎后小颗粒的占比有一定影响。(3)通过仿真与试验对比,将破碎仿真可视化,更好地描述破碎特征,同时验证了Tavares模型的有效性,标定了某矿石的仿真参数,为矿石颗粒的破碎仿真提供了新的方法,研究结果为后续破碎机设计提供了新的思路。
中图分类号:
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