Applications

Agglomeration 

A high percentage of fine dust and poor flowability often make powdered substances difficult to process when it comes to bottling, measuring and transport. The process of agglomeration changes the physical properties of these products.

A powder's fine particles are fused together using a binding agent to form larger groups of particles, which makes them easier to process. Equally, for many substances it is sometimes only possible to achieve good solubility by increasing particle porosity through agglomeration or instantisation. Substances created through agglomeration ensure a good flow of material and lower dust levels in the surrounding area.

Advantages

  • Improves flowability
  • Lowers risk of separation
  • Reduces percentage of fine dust
  • Improved tabletisation
  • Instantisation

Basic principle
The starting product (powder) is injected into the fluidised bed processor as a 'fluid', i.e. vigorously mixed in with a heated gas stream and held in a suspended state. Using specially designed two-substance nozzles, the particles are moistened with a suitable liquid. A liquid bridge forms between the individual particles. During the subsequent drying process, these bridges become solidified and thus stabilise the granulate. The blackberry-shaped structure is then dried to achieve the desired final moisture content.

  • Three- & Four-Substance 946, 0/56

    Circular full-coneRead more
  • Two-Substance - 0/64-0/60

    Internal mixing - circular full-conesRead more
  • Two-Substance - 937

    External mixing - circular full-conesRead more
  • Two-Substance - 940

    External mixing - circular full-coneRead more
  • Two-Substance - 970

    External mixing - circular full-coneRead more

Publications

  • Say Goodbye to Blockages

    Use of anti-bearding cap nozzles in fluidised bed systems

    Blocked spray nozzles are a widespread problem in fluidised bed systems in which very fine or tacky products are processed. By using ABC nozzles, the pharmaceutical excipient manufacturer DMV Fonterra Excipients has succeeded in avoiding unplanned downtimes. Düsen-Schlick Anti-bearding cap technology (ABC nozzles) is well-established in the field of tablet coatings.

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