Metso–Loesche VRM venture: dry grinding flowsheet implications for process engineers
Reviewed by Tom Sullivan

First reported on International Mining – News
30 Second Briefing
Metso Corporation and Loesche GmbH have formed a partnership to roll out Metso Loesche vertical roller mill (VRM) dry grinding technology, now integrated into the Metso Plus offering for minerals processing. The VRM is positioned as a direct replacement for high-pressure grinding rolls (HPGR) and horizontal mills in primary grinding circuits, targeting reduced energy use and a smaller plant footprint. For process engineers, the move signals a push towards single-stage dry comminution flowsheets with fewer conveyors, screens and slurry handling systems.
Technical Brief
- Metso Loesche VRM is being positioned for a “wide range” of minerals, not just iron ore.
- Integration into the Metso Plus portfolio means VRMs are bundled with Metso’s existing process and lifecycle services.
- Loesche contributes long-running industrial VRM design experience from cement and slag grinding into mining circuits.
- Dry VRM operation reduces or eliminates slurry pumps, cyclones and large sumps in comminution areas.
- Single, tall VRM units enable more compact multi-level plant layouts compared with horizontally distributed mills.
- Reduced auxiliary equipment count simplifies structural steelwork, foundations and platework detailing around the grinding line.
- For greenfield mines, VRM-based dry circuits could materially cut water supply, tailings thickening and pipeline requirements.
Our Take
Metso features frequently in our Mining category for comminution and process optimisation pieces, so a vertical roller mill (VRM) venture with Loesche signals an attempt to lock in more of the grinding flowsheet rather than just supply individual components.
Within the 2048 tag-matched pieces that include ‘Product’ and ‘Sustainability’, most OEM items focus on incremental retrofits; a dedicated VRM partnership suggests Metso and Loesche are targeting greenfield and major brownfield redesigns where energy-efficient grinding can materially shift project economics.
For mine operators, a Metso–Loesche VRM offering could increase vendor competition against established SAG/ball mill packages, which in turn may give projects more leverage on capex and power-consumption guarantees during early-stage design and tendering.
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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