Ultrafines dewatering: converting field and laboratory test work results into process design criteria

Authors: Cocks, BLD

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DOI https://doi.org/10.36487/ACG_repo/2655_32

Cite As:
Cocks, BLD 2026, 'Ultrafines dewatering: converting field and laboratory test work results into process design criteria', in AB Fourie, M Horta, M Oliveira & S Wilson (eds), Paste 2026: Proceedings of the 28th International Conference on Paste, Thickened and Filtered Tailings, Australian Centre for Geomechanics, Perth, pp. 1-15, https://doi.org/10.36487/ACG_repo/2655_32

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Abstract:
The mineral sands industry faces challenges from lower-grade deposits with higher ultrafine clay content. Operations previously reliant on free-flowing sands must adopt new technologies to maintain throughput and mine life. Regulatory constraints demand innovative methods for safe ultrafine residue disposal that promote post-mining agricultural land rehabilitation while preventing production bottlenecks. To minimise land sterilisation and operational risks, mining companies are exploring alternative dewatering techniques beyond conventional market solutions. This study examines frequently overlooked technologies through laboratory and field trials, developing robust process design criteria for design of effective mine tailings management processes in these challenging conditions.

Keywords: accelerated mechanical consolidation, residue dewatering,polymer-assisted co-disposal, rehabilitation

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