AN ALTERNATIVE MINERAL SOLUTION FOR DEPOSIT CONTROL, TAPPICon24

Mineral deposit control agents are being used increasingly in pulp mills to avoid both the formation of sticky deposits on their machines and as a natural alternative to mitigate excess chemical usage. Minerals are used primarily at the pulping stage to act via an adsorption mechanism which prevents the eventual sticky deposits. If the deposits are not controlled it can increase mill downtime for cleaning operations and detrimentally impact the final paper products. Although talc is still the primary mineral used in certain regions for pitch and sticky control, the search for alternatives is not misplaced. For this reason, this paper aims to introduce the novel idea of a cationised kaolin as an alternative mineral deposit control agent. Overall the combination of electrostatic attraction, available surface area, layered structure and favourable particle characteristics makes cationic kaolin potentially a very good alternative and effective agent for deposit control. In the lab, model systems of deposit material were used to assess the minerals capability for controlling them and were based on separation technique and turbidity of the supernatant.

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