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    Metso Select SAG and ball mills at Viscaria: process design notes for engineers

    January 14, 2026|

    Reviewed by Joe Ashwell

    Metso Select SAG and ball mills at Viscaria: process design notes for engineers

    First reported on International Mining – News

    30 Second Briefing

    Metso will supply two Select horizontal grinding mills – a SAG mill and a ball mill – to Gruvaktiebolaget Viscaria’s re-opened Viscaria copper mine in Kiruna, northern Sweden. The plant is designed for 26,000 t/y of copper concentrate, positioning Viscaria as Sweden’s second-largest copper producer once ramp-up is complete. For process engineers, the Select platform’s standardised mill design and OEM-integrated lifecycle services should simplify sizing, installation and optimisation of the new grinding circuit.

    Technical Brief

    • Both mills supplied as standardised Select platform units, enabling modular configuration and shortened delivery engineering.
    • OEM scope includes engineering, manufacture and supply; installation and commissioning support typically integrated under Select lifecycle services.
    • Select mills use pre-validated drivetrain and bearing configurations, reducing custom design risk for the Viscaria grinding circuit.
    • Standardised spares and wear parts across the Select line simplify inventory and maintenance planning for the Kiruna site.
    • Integration of OEM process optimisation services with the new mills supports debottlenecking of upstream crushing and downstream flotation.
    • For similar Nordic brownfield restarts, Select’s catalogue-based sizing can compress feasibility-to-start-up schedules.

    Our Take

    Metso’s grinding mill order for the Viscaria copper mine in northern Sweden lands amid record stirred mill sales in 2025, suggesting the company is deepening its installed base across both conventional SAG/ball and newer energy‑efficient configurations in copper circuits.

    Recent Metso contracts for a large primary copper smelter complex in Asia, alongside this Viscaria copper concentrate project, indicate the OEM is positioning across the full copper value chain from mine grinding to smelting, which can simplify technology standardisation for multi-asset operators.

    With 596 Mining stories and 150 keyword‑matched copper pieces in our database, copper projects like Viscaria in Kiruna are among the more closely tracked developments, signalling that equipment selections here may be seen as reference choices for other Nordic and European copper concentrators.

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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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