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    Corroline+ hoses at Cornish Lithium: slurry handling lessons for plant engineers

    June 15, 2026|

    Reviewed by Joe Ashwell

    Corroline+ hoses at Cornish Lithium: slurry handling lessons for plant engineers

    First reported on International Mining – News

    30 Second Briefing

    Blockages in rigid 90° pipework carrying sulphuric-acid-treated mica slurry at Cornish Lithium’s Trelavour hard-rock lithium demonstration plant near St Austell have been resolved by replacing them with flexible Corroline+ hoses from Aflex Hose, part of Watson-Marlow. The PTFE-lined, corrosion-resistant hoses allow smoother routing and reduced sharp bends, cutting slurry build-up and unplanned downtime in the hydrometallurgical circuit. For process and plant engineers, the change points to simpler layouts, fewer fittings and easier maintenance in abrasive, acid leach slurry handling.

    Technical Brief

    • Corroline+ hoses use a smooth-bore PTFE liner, reducing internal turbulence and particle hang-up.
    • The PTFE liner provides full chemical compatibility with sulphuric-acid-treated mica slurry in the leach circuit.
    • Flexible hose routing allows larger bend radii than 90° elbows, lowering local velocity and impact wear.
    • Hose assemblies reduce the number of rigid fittings and flanges, cutting potential leak points in the acid system.
    • Corroline+ is designed for vacuum and positive pressure duties, suiting variable pumping conditions in demonstration plants.
    • External reinforcement on Corroline+ hoses supports kink resistance under tight routing constraints around existing equipment.
    • Quick-disconnect style end fittings enable faster isolation and removal for cleaning or hose replacement.
    • Similar flexible PTFE hose retrofits are applicable to brownfield hydrometallurgical plants with congested pipe racks and sharp changes in direction.

    Our Take

    Cornish Lithium’s Trelavour hard-rock demonstration plant sits alongside its separate Copper House drilling plans near Burncoose and Redruth, signalling that the company is actively testing multiple lithium extraction routes across Cornwall rather than betting on a single asset type.

    Within our mining database, only a modest subset of lithium-tagged pieces focus on the UK, so operational learnings from Cornish Lithium in Cornwall are likely to become reference points for other prospective European hard-rock and geothermal lithium schemes facing similar permitting and space constraints.

    The blockage issues linked to 90-degree rigid pipe bends at the Trelavour plant highlight how flow assurance and hose specification can be a critical bottleneck in small-footprint demonstration circuits, with implications for scale-up design where retrofitting around tight corners is costly and disruptive.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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