Granules from fine powder: Agglomaration

  1. rollingstein

    rollingstein 636
    Gold Member

    I'm trying to convert a fine powder into hard granules (1mm - 3mm dia) & was trying to use a Fluidized Bed Dryer to do it. It seems to somewhat work but the granules stay crumbly & soft rather than the hard product I need.

    My protocol is to mix ~20% starch as a binder & then add water & fluidize the bed with 50 C air for about 30 minutes in the hope that the particles agglomerate.

    Any tips? What other parameters are relevant?
  2. jcsd
  3. Greg Bernhardt

    Staff: Admin

    I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
    1 person likes this.
  4. rollingstein

    rollingstein 636
    Gold Member

    No, I gave up on the problem. I couldn't find a way to get it to work.
  5. The problem may be with the binder. Thinking about it from first principles, you need a binder that will wet the metal, but has a high enough surface tension (and high viscosity would help) to hold the granule together.

    If I had to solve this problem, I would be looking at a fatty acid salt of the metal you are trying to agglomerate.
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