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    Metso Simberi expansion package: flowsheet and risk notes for gold plant engineers

    August 27, 2026|

    Reviewed by Joe Ashwell

    First reported on International Mining – News

    30 Second Briefing

    Metso has secured multiple process technology packages for the New Simberi Gold Project Expansion in Papua New Guinea, supplying grinding, flotation, thickening and filtration equipment. The project is owned by Simberi Gold Company Limited, a 50:50 joint venture between Lingbao Gold Group and St Barbara Limited, with engineering delivery led by Pitch Black Group. The deal signals further standardisation of Metso’s integrated comminution–flotation–tailings dewatering flowsheets on brownfield gold expansions in the Asia–Pacific region.

    Technical Brief

    • Packages span comminution, flotation, thickening and filtration as an integrated process technology scope.
    • Metso’s supply is structured as several discrete “major” packages rather than a single EPCM lot.
    • Engineering delivery is centralised under Pitch Black Group, separating OEM process design from project management.
    • Unified OEM supply for grinding–flotation–dewatering reduces interface risk between unit operations and control systems.
    • Concentrate thickening and filtration scope suggests a push towards lower-moisture tailings and reduced storage volumes.

    Our Take

    Metso’s win at the New Simberi Gold Project Expansion follows a run of recent process‑plant awards at Troilus (gold‑copper, Canada) and Yitirrti (copper‑zinc‑silver, Australia), signalling that operators are favouring its integrated grinding‑to‑filtration packages for new builds rather than piecemeal sourcing.

    With Simberi Gold Company Limited split 50/50 between Lingbao Gold Group and St Barbara Limited, major plant choices like this Metso package are likely to be benchmarked against both Chinese and Australian portfolios, which can tighten specifications on availability, remote support and lifecycle cost in Papua New Guinea conditions.

    Gold remains one of the more frequently covered commodities in our mining database, and pairing a gold expansion in Papua New Guinea with Metso’s global reference base may help the owners de‑risk permitting and financing discussions by pointing to comparable flowsheet performance at other gold operations in our coverage.

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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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