Influence of plate surface protuberance size and shape on the production of pellets by extrusion-spheronisation

- Cross-hatched pattern friction plates were of different size and shape surface protuberances.
- A systematic effect of plate surface protuberances on spheronisation yield was evident.
- The size and shape of the protuberances had significant effects on pellet quality.
- The relative size of pellets to protuberances has an important role in spheronisation.