Metso modular Grinding classification system: design and upgrade notes for plant engineers
Reviewed by Joe Ashwell

First reported on International Mining – News
30 Second Briefing
Metso is launching a configurable Grinding classification system built from compact, pre‑engineered modules integrating pumps, hydrocyclones, product samplers, liquid resistance starters and particle size measurement. The modular skids are designed to shorten design and installation schedules for new and brownfield grinding circuits while standardising layouts, interfaces and safety provisions. For plant engineers, the approach simplifies layout planning, reduces on-site fabrication and should ease future debottlenecking or capacity upgrades by swapping or adding classification modules.
Technical Brief
- Modules integrate hydrocyclones, pumps, samplers, liquid resistance starters and particle-size measurement into single skids.
- Factory pre-engineering allows repeatable structural supports, walkways and guarding layouts around rotating and pressurised equipment.
- Standardised interfaces enable consistent isolation valves, lock‑out points and pressure‑relief arrangements across multiple modules.
- Compact skids reduce on-plant pipe runs and cable trays, lowering trip hazards and congestion around mills.
- Predefined instrumentation packages facilitate uniform alarm setpoints and interlocks for sump levels and cyclone feed pressures.
- Off-site assembly and testing shift more work into controlled environments, reducing hot work and working‑at‑height on site.
- Consistent module geometry simplifies CFD and structural checks for slurry load cases and vibration response.
- For brownfield upgrades, plug‑in modules reduce tie‑in duration, limiting exposure to simultaneous operations risks.
Our Take
Metso’s new modular grinding classification system sits alongside its recently launched Grande Series screens and integrated crushing–grinding–flotation flowsheet work on critical minerals, signalling a push to offer more plug‑and‑play, OEM‑standardised process islands rather than purely bespoke circuits.
The divestment of Metso’s Häggblom loading and hauling business to Miilux Oy, combined with investment in modular comminution and the new Pittsburgh bulk handling hub, suggests Metso is reallocating capital away from mobile earthmoving hardware toward higher‑margin, process‑plant and materials‑handling solutions.
Within our 274 Mining stories and 586 tag‑matched pieces, Metso appears frequently in ‘Product’ and ‘Projects’ items, indicating that operators evaluating this modular grinding classification system can expect a relatively mature support ecosystem and ongoing product iteration rather than a one‑off launch.
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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