Metso & Loesche dry VRM grinding: energy and water-use takeaways for mine engineers
Reviewed by Tom Sullivan

First reported on International Mining – News
30 Second Briefing
Metso Corporation and Loesche GmbH have formed an exclusive partnership to deploy Metso Loesche VRM dry grinding technology across a wide range of mineral processing circuits. The agreement couples Loesche’s vertical roller mill design, proven in cement and industrial minerals, with Metso’s end-to-end flowsheet engineering and global service network to offer fully dry comminution and classification. For mine operators, the VRM-based dry route targets reduced water use, lower specific energy consumption versus conventional SAG/ball mill–HPGR setups, and a smaller plant footprint.
Technical Brief
- Partnership is exclusive, giving Metso sole rights to deploy Loesche VRM tech in mining circuits.
- Loesche contributes cement-proven vertical roller mill design, adapted for hard-rock and industrial mineral ores.
- Metso integrates VRM units into full comminution–classification flowsheets, including upstream crushing and downstream separation.
- Arrangement embeds VRM supply within Metso’s global service network for spares, wear parts and field support.
- Dry grinding route is targeted at orebodies and regions where process water is constrained or costly.
- Integration focus includes dust handling, air classification and product transport to maintain fully dry operation.
- Partnership structure suggests single-point EPC/EPCM responsibility for VRM-based grinding lines, simplifying project interfaces.
- Similar cement-industry VRM deployments provide a reference base for scale-up, wear behaviour and maintenance planning in mining.
Our Take
Among the 1103 Mining stories in our coverage, there are relatively few JV-tagged items centred on process plant OEMs, so a Metso–Loesche tie-up signals that major equipment houses are starting to share IP rather than competing solely on proprietary grinding circuits.
Within the 2077 tag-matched pieces for Projects/Product/Sustainability, most decarbonisation content focuses on mobile fleets or renewables; a dry grinding JV like this points to comminution energy and water use becoming a more material lever for mine-level ESG strategies.
For operators, a Metso–Loesche JV around dry grinding suggests future brownfield upgrades may be structured around integrated vendor packages rather than piecemeal mill swaps, which can simplify performance guarantees but may reduce flexibility to mix-and-match components.
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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