Sunday, September 19, 2021

Rotating Shape Granulators

by | June 18, 2020 0

Granulators are machines that form small particles into permanent aggregates to render them into free-flowing state. In Rotating Shape Granulators, the machine shell or the entire mixer shell rotates at a moderate speed around an axis parallel to the ground resulting in the mixing of materials and granulation process.

Particle densification and/or agglomeration is by incorporation of a granulating fluid into the powder mix with low-power-per-unit mass through rotation of the containing vessel and/or intensifier of a cylinder and the rotation speed in rpm(revolution per minute) of the vessel is a function of the vessel size.

Although rotating shape granulators may differ from one another as a result of the vessel geometry and the type of dispersion or intensifier bar, no rotating shape granulator subclasses have been identified. Granulators that fall under this category of granulator are;

  • Slant cone (slant double cone mixer granulator).
  • Double cone (double cone mixer granulator).
  • V-blender with intensifier bar.
  • Slant V- blender

These rotating shape granulators have some advantages over each other. For instance, the dead space that may occur in a double-cone mixer granulator is eliminated in the slant double-cone mixer granulator design.

Advantages of Rotating Shape Granulators

  • Minimal shear and attrition during mixing.
  • The granulator is easy to clean after use.
  • Materials are easily loaded and discharged from the granulator.

Read Also: High Shear Granulator


  • Dilip M. Parikh (2010). Handbook of Pharmaceutical Granulation Technology, Third Edition. CRC Press, Taylor and Francis Group, LLC.
  • Jim Litster, and Bryan Ennis (2004). The Science and Engineering of Granulation Processes. Kluwer Academic Publishers, Dordrecht, Netherland.
  • Larry, L. A. and Stephen, W. H. (2008), Pharmaceutical Dosage Form: Tablet. CRC Press, Taylor and Francis Group, LLC.

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