Particle size distribution of coal and gangue after impact-crush separation
Particle size distribution of coal and gangue after impact-crush separation
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DOI：
10.1007/s11771-017-3529-2
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发表时间：
2017-06-01
影响因子：
4.4
通讯作者：
Liu Song-yong
中科院分区：
文献类型：
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作者：
Yang Dao-long;Li Jian-ping;Liu Song-yong
基于煤矸石分选分选系统，利用煤矸石的硬度差异，在单轴压缩试验的基础上，进行了矿物质冲击试验。将破碎的煤和矸石颗粒收集并通过不同尺寸的筛网进行筛分。根据Rosin-Rammler分布，研究了不同冲击速度下煤和矸石的粒度分布。讨论了分离指标与冲击速度之间的关系。实验发现，煤料存在一个完全破碎的边界。实验结果表明，Rosin-Rammler分布能较准确地描述不同冲击速度下破碎煤矸石的粒度分布，当冲击速度为12.10 m/s时，存在一个最小重叠区域，此时煤矸石的混合度最小，有利于煤矸石的分选。
Based on the separation and backfilling system of coal and gangue, the mineral material impact experiments were conducted utilizing the hardness difference between coal and gangue according to the uniaxial compression experiments. The broken coal and gangue particles were collected and screened by different size meshes. The particle size distributions of coal and gangue under different impact velocities were researched according to the Rosin-Rammler distribution. The relationships between separation indicators and impact velocities were discussed. It is found from experiments that there is a fully broken boundary of coal material. The experimental results indicate that the Rosin-Rammler distribution could accurately describe the particle size distribution of broken coal and gangue under different impact velocities, and there is a minimum overlap region when the impact velocity is 12.10 m/s which leads to the minimum mixed degree of coal and gangue, and consequently the benefit of coal and gangue separation.