Simulation Study on Separation Effect of Mineral Particles Based on EDEM-FLUENT Coupling
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摘要:
为了能同时依据矿粒的密度和粒度对其分离，尝试选用水平冲击水流和振动作用的联合分离工艺，采用EDEM-FLUENT耦合方法，以矿粒的回收率及分离产品含杂率为评价指标，对矿粒在分选装置中的分离行为进行模拟研究，并探讨不同工艺参数对矿粒分离效果的影响。结果表明：所选用的分离工艺可有效地依据矿粒的密度和粒径进行分离。添加振动筛能大幅度降低分离产品的含杂率。分选装置的较佳参数为：筛面倾角为0°、振动频率为10 Hz、振幅为3 mm、颗粒入口底部宽度为7 mm，此时回收率96.8%，含杂率5.67%。
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关键词:
- EDEM-FLUENT耦合 /
- 矿粒分离 /
- 回收率 /
- 含杂率 /
- 模拟研究
Abstract:In order to separate different minerals at the same time according to density and grain size of mineral particles, the combined separation process of horizontal water flow and vibration and the coupling method of EDEM-FLUENT were used, mineral recovery and impurity rate used as the evaluation index. The separation behavior of mineral particles in the separation device was simulated, and the influence of different process parameters on the separation effect of mineral particles was discussed. The results show that the selected separation process can effectively separate mineral particles according to the density of mineral particles and size of mineral particles. The addition of vibrating screen can greatly reduce the impurity content of mineral particles in the separated products.The optimal parameters of the sorting device are: screen surface inclination Angle is 0°, vibration frequency is 10 Hz, amplitude is 3 mm, particle inlet bottom width is 7 mm. By this time recovery 96.8% and containing impurity rate 5.67% were obtained.
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Key words:
- EDEM-FLUENT coupling /
- Separation of mineral particles /
- Recovery /
- Impurity rate /
- Simulation study
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表 1 壳体各部分尺寸 /mm
Table 1. Dimensions of each part of the shell
进料口底部 进水口 出口Ⅰ 出口Ⅱ 出口Ⅲ 出口Ⅳ 长度 60 90 100 100 100 90 宽度 8 10 77 57 95 70 高度 15 10 20 20 20 5 
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表 2 材料物理参数
Table 2. Material physical parameters
名 称 泊松比 剪切模量/MPa 密度/(kg·m-3) 目标矿粒 0.4 70 6500 脉石矿粒 0.4 21 2650 分选装置 0.3 7.9×104 7800
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表 3 材料接触系数
Table 3. Material contact coefficient
名 称 恢复系数 静摩擦系数 动摩擦系数 颗粒-颗粒 0.44 0.27 0.1 颗粒-筛网 0.50 0.15 0.1
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表 4 有无振动筛作用下矿粒的回收率及含杂率
Table 4. Recovery rate and impurity content of ore particles with and without vibrating screen
名 称 颗粒总数 目标矿粒
总数/个脉石矿粒
总数/个回收率/% 含杂率/% 无振动筛 1609 988 621 98.8 38.60 有振动筛 1139 962 177 96.2 15.54
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表 5 不同颗粒入口底部宽度时目标矿粒回收率及含杂率
Table 5. Recovery rate and impurity content of target ore with different bottom width of particle inlet
颗粒入口宽度/mm 回收率/% 含杂率/% 7 96.8 5.67 8 94.6 8.94 9 90.4 11.87 10 88.9 13.53
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