Magnetically stabilized fluidization, part II: Continuous gas filtration

The magnetically stabilized fluidized bed can be used as a dust filter, as was suggested earlier by Rosensweig and coworkers (1983). In this experimental study filtration tests were carried out under various conditions. It was shown experimentally that dust particles of about one micron can be filtered effectively in beds of magnetite particles of about 300 microns, with a bed height of 10 cm. The filtration efficiency was predicted reasonably well by existing theories. By using a magnetic grid plate, proposed by Jaraiz and coworkers (1983), an even quasi continuous downflow of the solids can be realized. Since it was shown that the dust penetrates the bed for a few millimeters only, a very effective removal of the collected dust can be obtained. In this manner, the filter was used effectively in a continuous operation. The results appear to be especially promising for dust filtration of gas flows under high pressure and at elevated temperatures. limited only bv the Curie Doint of the bed material.