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    Multotec spirals and cyclones: circuit design and recovery notes for metallurgists

    July 9, 2026|

    Reviewed by Joe Ashwell

    Multotec spirals and cyclones: circuit design and recovery notes for metallurgists

    First reported on International Mining – News

    30 Second Briefing

    Multotec is pushing higher-precision mineral separation with high-efficiency spiral concentrators and hydrocyclones, backed by manufacturing, R&D and field service operations in more than 100 countries. The company is leveraging over 20 years of Canadian site experience to optimise spiral and cyclone configurations for local orebodies, including cold-climate installations and variable feed conditions. For plant designers and metallurgists, the focus is on tighter cut points, reduced bypass and improved water balance, directly affecting recovery, tailings load and overall circuit stability.

    Technical Brief

    • High-efficiency spirals use gravity-driven laminar flow to separate fine particles without additional power demand.
    • Spiral concentrators are configured in banks, allowing stage-wise upgrading and flexible reconfiguration as ore characteristics change.
    • Hydrocyclones provide sharp size classification by balancing vortex strength, feed pressure and apex/vortex finder geometry.
    • Field service teams routinely adjust cyclone operating pressure and spigot sizes to stabilise circulating loads in variable feeds.
    • Integration of spirals upstream of cyclones can reduce load on milling circuits by rejecting coarse, low-value fractions early.
    • Similar gravity–hydrocyclone circuits are increasingly favoured where water scarcity and energy costs constrain conventional thickening.

    Our Take

    With Multotec active in around 100 countries and already supplying spiral concentrators to the Thaba JV chromite and PGM project in South Africa, the spirals and cyclones highlighted here are clearly being positioned as globally standardised kit that can still be tailored to specific ore bodies.

    The promotion of GV Cyclones for above-ground tailings deposition in a separate piece suggests Multotec is aligning its cyclone designs not only for separation efficiency but also to help operators respond to tighter tailings and water-recovery regulations.

    Across the 1242 Mining stories in our database, Multotec appears repeatedly in Product- and Projects-tagged coverage, signalling that the company is using its two decades of Canadian experience and wider global footprint to push process equipment as a lever for both throughput and ESG compliance rather than just incremental plant upgrades.

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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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