Rotating Shape Granulators

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

REFERENCES

• 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.