Results 1 to 4 of 4

Thread: Gentle Reduction of Agglomerate Size

  1. #1
    nmbnmb Guest

    gentle reduction of agglomerate size

    We convey 2 tons/h of a spray dried modified starch through a low dense pneumatic system with ambient air. The particles are agglomerates with a loose grape structure - and low bulk density - and with a low mechanical strength. We want to reduce particle size >just a little< in order to increase final powder bulk density - a little.
    Use of built-in mills is not possible.
    Has anybody experience with in-line static impingement for a gentle particle size reducion in a 100mm (4"inch) pneumatic conveyor ?
    Thanks in advance

  2. #2

    gentle reduction of agglomerate size

    Thought of using a cyclone at the receiving end?

    Michael Reid.

  3. #3
    Dennis Hauch - Freeport, TX, USA Guest

    Particle Size Reduction


    I would suggest that a particle size distribution (PSD) measurement be made of the starch both before and after conveying. If there is a noticeable shift in the PSD, it follows that increasing the conveying velocity will increase particle degradation. The beauty of this approach is that the desired PSD can be approached incrementally.

    Best regards,

    Dennis Hauch

  4. #4
    Patrick Cole Guest

    gentle reduction of agglomerate size


    We have done more attriction of powders (milk powders in Denmark) Here we had spool peices of zig, zag shape which we could insert into the convey line instead of a streight section as close to the end of the line as possible. We had 6 peices we could put in but only used 3-4 dependant on the strenght of agglomerate. This worked well as long as the drier was stable.
    Patrick Cole
    Colby Powder Systems

Similar Threads

  1. DLS & Multimodal size distributions
    By naik in forum Particle Characterization & Analysis
    Replies: 1
    Last Post: 19th August 2002, 22:40
  2. Invitation for bids - size reduction, classification and conveying equipment
    By Author in forum New Projects, Tenders, Inquiries
    Replies: 0
    Last Post: 28th May 2002, 16:26
  3. Looking for market info on particle size distribution instrumentation
    By kenzheng in forum Particle Characterization & Analysis
    Replies: 5
    Last Post: 17th December 2001, 19:46
    By Mark Kilfoil in forum Pneumatic Conveying
    Replies: 5
    Last Post: 31st October 2001, 23:40
  5. Frame size of centrifugal pumps
    By Madhukar Anand in forum General Aspects
    Replies: 0
    Last Post: 10th November 2000, 14:20

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Single Sign On provided by vBSSO