Yoshimi Tanabe1 and Kyoko Fujii1
1Faculty of Engineering, Tokyo Metropolitan University, Tokyo
In this paper, as the first step of study on the removal of zinc in open hearth dust by chloridizing roasting with a fluidized bed, the possibility of a fluidization of dust was investigated, and then the elutriation velocity constant and the average residence time were measured by means of the batch type fluidized bed. The results obtained were as follows:
(1) A fluidization of dust occurred by mixing dust with powdered iron ore.
(2) The elutriation velocity constant was proportional to about 2.5 power of the fluid velocity.
(3) In the absence of overflow, the average residence time was 7 min at the fluid velocity of 100 cm/sec and 1700 min at the fluid velocity of 10 cm/sec.
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