Effect of Drying on Powder Coating Efficiency and Agglomeration in Vibro-Fluidized Bed

Authors :: Dept. of Applied Chemistry, Kyushu Institute of Technology, Kitakyushu, Japan
Kage, Hiroyuki
Nishihara, Keiichi
Ishimatsu, Hiromichi
Ogura, Hironao
Matsuno, Yoshizo
Dept. of Applied Chemistry, Kyushu Institute of Technology, Kitakyushu, Japan
Kage, Hiroyuki
Nishihara, Keiichi
Ishimatsu, Hiromichi
Ogura, Hironao
Matsuno, Yoshizo
Publication Year :: 2017
Abstract: type:Journal Article<br />Glass beads of 43 m were coated in a vibro-fluidized bed by atomizing a fine silica powder together with polyvinyl alcohol aqueous solution. The coating efficiency and weight fraction of the agglomerated particles were measured under various experimental conditions, and their dependencies on the frequency and the direction of vibration were investigated. The coating efficiency and the degree of the agglomeration among core particles correlated well with an index R. The index R was introduced to evaluate quantitatively the drying conditions in a fluidized bed. Application of vertical vibration on the fluidized bed lowered the coating efficiency somewhat, while it prevented agglomeration. From the experimental results it was confirmed that coating with high quality and high efficiency, where few agglomerates were produced and silica powder was utilized efficiently, was possible in a vibro-fluidized bed with adequate vibration frequency and orientation of the vibration vector.<br />source:http://www.informaworld.com/smpp/content~content=a713628017~db=all~order=page

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