Effect of solid circulation rate on coating efficiency and agglomeration in circulating fluidized bed type coater

Circulating fluidized bed was proposed to be used as a coater, and coating experiments of glass beads with silica powder were performed in a circulating fluidized bed. Glass beads and silica powder were chosen as model particles, because their shape was almost spherical. The respective effects of ga...

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Bibliographic Details
Published in:Powder technology 2003-02, Vol.130 (1), p.203-210
Main Authors: Kage, Hiroyuki, Abe, Ryuhei, Hattanda, Ryusuke, Zhou, Tao, Ogura, Hironao, Matsuno, Yoshizo
Format: Article
Language:English
Subjects:
Agglomeration
Applied sciences
Chemical engineering
Chemistry
Circulating fluidized bed
Coating
Colloidal state and disperse state
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
General and physical chemistry
Materials science
Materials synthesis
materials processing
Physics
Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation
Powders
Sintering, pelletization, granulation
Solid circulation rate
Solid circulation time
Solid-solid systems
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Summary:Circulating fluidized bed was proposed to be used as a coater, and coating experiments of glass beads with silica powder were performed in a circulating fluidized bed. Glass beads and silica powder were chosen as model particles, because their shape was almost spherical. The respective effects of gas flow rates supplied from a distributor and from an air nozzle for solid circulation, feed rate of powder suspension and particle content in the bed on coating efficiency and agglomeration are mainly discussed. Coating efficiency in circulating fluidized bed coater was correlated well with solid circulation time rather than with gas flow rates or solid circulation rate, while the agglomeration among core particles was mainly governed by solid circulation rate.
ISSN:0032-5910
1873-328X
DOI:10.1016/S0032-5910(02)00267-X