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Residence time

Tagged: Physical and chemical parameters Process control

Christian Kabbe
Participant

3 years, 7 months ago #2421

What is residence time, and why does it matter?

Forum Administrator
Keymaster

3 years, 7 months ago #2430

When liquid is added to the tumbling feed, the fine particles layer onto the intermediate and large nuclei’s (some intermediates may adhere to larger particles as well). Continued growth occurs as some intermediate particles change role from nuclei to layer particles. As a significant number of collisions is required, this stage is slow. Equilibrium is reached when the number of collisions dislodging particles from layers balances the number adding particles. This is the point for the maximum stable granule size.
This explains why residence time is required for granule growth mechanisms.

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