摘要
为满足超细粉体制备工艺的需要,尤其矿物加工领域超细或纳米级煤粉等的制备需要,本文基于粒径5～10μm超细墨粉的表面特征和界面状态,从理论角度分析了利用超声驻波分离流体中超细粉体过程的受力状态和运动过程,利用matlab探讨了声学参数对分离过程的影响,得到了声学参数对分离过程中超细粉体的受力及运动过程的影响规律,结果表明:粒径一定的超细粉体在频率和声强适当的超声驻波作用下能够有效分离,从而为超细粉体分离提供了一种新思路,为后续实验装置的设计与选型提供了科学依据。
Based on the surface features and interface states of 5～10 μm superfine coal particles,we describe the stress state and movement of superfine powder with ultrasonic standing wave and the effects of acoustic parameters on separation process to meet the needs of superfine powder preparation process,especially for superfine or nano-scale coal in mineral processing.the results show that acoustic parameters have certain influence with the stress state and movement of superfine powder with ultrasonic standing wave and Suitable frequency and sound intensity can separate certain superfine powder effectively.We propose a new method for the separation of superfine powder and provide a scientific basis for the design and selection of subsequent experimental setup.
出处
《科技通报》
北大核心
2013年第1期1-4,8,共5页
Bulletin of Science and Technology
基金
国家自然科学基金项目(51075387)
国家卫生部基金项目(LW201004)
关键词
超声驻波
超细粉体
超声辐射力
理论分析
ultrasonic standing wave
particle separation
superfine powder
ultrasound radiation force
