Metso’s record 2025 stirred mill sales: circuit design lessons for process engineers
Reviewed by Tom Sullivan

First reported on International Mining – News
30 Second Briefing
Metso booked record stirred mill sales in 2025 as miners shifted new and brownfield grinding circuits towards energy‑efficient, multi‑stage configurations. Demand is rising for optimised combinations of stirred mills with conventional SAG/ball mills to cut specific energy consumption and associated carbon emissions while maintaining or increasing throughput. For process and project engineers, the trend signals stronger scrutiny of comminution power draw, lifecycle operating costs and circuit layouts, with stirred milling moving from niche regrind duty towards mainstream primary and secondary grinding roles.
Technical Brief
- OEM scope typically covers mill sizing, media selection, liner configuration and control integration with plant DCS.
Our Take
Metso’s record stirred mill sales in 2025 line up with a run of large copper and gold plant awards in our database (Koné in Côte d’Ivoire and multiple copper smelter contracts in Asia and Uzbekistan), suggesting the company is increasingly locking in full comminution-and-processing packages rather than stand-alone equipment orders.
The new rubber and Poly-Met lining plant Metso is building in Quzhou, China, gives it a regional supply base for wear parts that are critical to stirred mill performance, which likely underpins both after-market margins and customer confidence in adopting higher-intensity grinding circuits.
Across the 572 Mining stories in our coverage, Metso appears unusually frequently in ‘Projects’ and ‘Product’ tagged pieces, signalling that OEM-led process design choices—like shifting to stirred milling—are increasingly shaping flowsheet decisions at the feasibility and expansion stages.
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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