Xu QianDe, Hu Wentao, Zhang Ming
Key Laboratory of High-Efficient Mining and Safety of Metal Mines ministry of education (USTB), University of Science and technology Beijing, Beijing, 100083, China.
Research Center for Efficient Utilization of Fine Minerals, University of Science and technology Beijing, Beijing, 100083, China.
Sci Rep. 2024 Oct 4;14(1):23124. doi: 10.1038/s41598-024-73367-y.
Microfine mineral particles have a small size, light weight, and low inertia, making it difficult for them to deviate from streamlines and collide with bubbles. Conventional flotation operations consume a large amount of reagents and exhibit poor flotation indicators. This study employs computational fluid dynamics (CFD) simulation and hydrodynamic testing to investigate the flow field within a high-turbulence microfine particle flotation machine equipped with a multilayer impeller-stator configuration, and validates the practical application performance of the microfine particle flotation machine through single-batch flotation experiments. Result shows that the impeller region of the traditional mechanical stirring flotation machine has a turbulent energy dissipation rate of 20 m²/s³, whereas that for the microfine particle flotation machine averages over 120 m²/s³. In the flotation verification, the cumulative recovery rate of the fine particle flotation machine is increased by 28% compared with that of the traditional KYF flotation machine. The flotation rate is also 1.3 times that of the KYF, demonstrating stronger selectivity for fine particle concentrates. It has certain guiding significance for the resource utilization of fine particle minerals.
微细矿物颗粒尺寸小、重量轻、惯性低，使其难以偏离流线并与气泡碰撞。传统的浮选作业消耗大量试剂，浮选指标不佳。本研究采用计算流体动力学（CFD）模拟和流体动力学测试，对配备多层叶轮-定子结构的高湍流微细颗粒浮选机内的流场进行研究，并通过单批次浮选实验验证微细颗粒浮选机的实际应用性能。结果表明，传统机械搅拌浮选机的叶轮区域湍能耗散率为20平方米/秒³，而微细颗粒浮选机的平均湍能耗散率超过120平方米/秒³。在浮选验证中，微细颗粒浮选机的累积回收率比传统KYF浮选机提高了28%。浮选速率也是KYF浮选机的1.3倍，对细颗粒精矿表现出更强的选择性。这对细颗粒矿物的资源利用具有一定的指导意义。
