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    题名: Influence of the interaction between binder and powders on melt agglomeration behavior in a high-shear mixer
    作者: Cheng,HJ;Hsiau,SS;Liao,CC
    贡献者: 機械工程學系
    关键词: WET GRANULATION PROCESSES;DROP PENETRATION TIME;PARTICLE-SIZE;CONTACT-ANGLE;GROWTH MECHANISMS;VISCOSITY;SAND;HETEROGENEITY;GRANULES
    日期: 2011
    上传时间: 2012-03-27 17:07:31 (UTC+8)
    出版者: 國立中央大學
    摘要: The purpose of this study was to investigate the effects of the different surface properties of powders on granular agglomeration in a high-shear mixer. Polyethylene glycol 6000 (PEG 6000) was used as the melting binder. Three different powders, with mean granule sizes of 75-150 mu m were used as the raw materials: calcium carbonate, calcium sulfate, and sodium carbonate. The wetting properties of the raw materials were measured with a contact angle instrument. The results indicate that the speed at which the droplets sink into the powder bed and the contact angle of binder droplets on the powder surface play important roles in determining the progress of the agglomeration process. Several types of agglomeration were found: a slurry state, heterogeneous nucleation, snowballing, and induction growth behavior. Heterogeneous dispersion leads to induction behavior and subsequent growth, but a homogeneous dispersion leads to little or no nucleation and growth of agglomerate size. (C) 2011 Elsevier B.V. All rights reserved.
    關聯: POWDER TECHNOLOGY
    显示于类别:[機械工程學系] 期刊論文

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