摘要
Four kinds of SiO2 （5-10 nm）＋ Fe3O4 （44.8 μm） particle were fluidized in a sole acoustic field, a sole magnetic field and a combined acousticmagnetic field. Introduction of a single field, 100 dB/40-60 Hz acoustic or 10 mT magnetic, could suppress plugging and channeling and reduce the superficial minimum fluidization gas velocities, Umf. Combination of both acoustic and magnetic fields demonstrated even more promising results, especially more significant reduction of Umf.
Four kinds of SiO2 （5-10 nm）＋ Fe3O4 （44.8 μm） particle were fluidized in a sole acoustic field, a sole magnetic field and a combined acousticmagnetic field. Introduction of a single field, 100 dB/40-60 Hz acoustic or 10 mT magnetic, could suppress plugging and channeling and reduce the superficial minimum fluidization gas velocities, Umf. Combination of both acoustic and magnetic fields demonstrated even more promising results, especially more significant reduction of Umf.
基金
This research is supported by Natural Science Founda- tion of Shandong Province （Contract No. Z2003B04 and No. Q2006B08）
the Project sponsored by SRF for R0CS, SEM （Contract No. 2004527）
the Key Project of Chinese Ministry of Education （Contract No. 105106）
by National Natural Science Foundation of China （Contract No. 20490200）.
