气雾化粉末制备用组合式分离器分离性能的数值模拟及实验研究

来源期刊:中国有色金属学报2020年第12期

论文作者:刘杨 张国庆 许文勇 郑亮 李周

文章页码:2940 - 2951

关键词:组合式分离器;数值模拟;气雾化制粉;选区激光熔化

Key words:combined separator; numerical simulation; gas atomization powder preparation; selective laser melting

摘    要:基于计算流体力学模拟技术(CFD)和实验结合的方法,设计了一种用于气雾化制粉设备的组合式分离器,开展了高温合金粉末分离性能研究,旨在利用不同结构分离器性能差异直接在制粉过程中实现粗细颗粒分级分离。结果表明,在氩气流量400 m3/h、粉末流量1 kg/min的工况条件下,C1结构的分离器对细微颗粒分离效率偏低,而C2结构的分离器对细微颗粒保持较高的分离效率,两种结构分离器组合能有效地实现粗细颗粒分级分离,从而达到缩短选区激光熔化用金属粉末制备周期和降低成本的目的。

Abstract: A kind of combined separator for gas atomization equipment was designed. The combination of computational fluid dynamics(CFD) simulation and experiment were employed to investigate the separation performance. Based on the separation performance difference between two different structure separators, the coarse and fine particles can be hierarchically collected during the powder preparation process, so that the preparation cycle and the cost of alloy powder for selective laser melting(SLM) can be reduced. The results indicate that the collection efficiency of C1 structure separator for fine alloy particles is lower under the condition of argon flow rate of 400 m3/h and powder flow rate of 1kg/min, while C2 structure separator exhibits a high collection efficiency for fine alloy particles under the same gas atomization condition. These two structure separators in series connection can effectively classify fine and coarse particles, thus the separation treatment cycle in the next process can be shorten.

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