Metso GFF flip-flow screens: HPGR circuit performance lens for process engineers
Reviewed by Joe Ashwell
First reported on International Mining – News
30 Second Briefing
Metso has introduced the GFF Series flip-flow screens for fine dry screening of difficult, often moist ores and aggregates, targeting applications such as sand manufacturing and high-pressure grinding rolls (HPGR) closed circuits. The rugged screen design is aimed at maintaining stable classification under high wear and vibration, while delivering finer cut sizes than conventional dry screening equipment. For HPGR circuits, the tighter size control should improve recirculating load management and downstream grinding efficiency, particularly where water use is constrained.
Technical Brief
- GFF Series flip-flow screens use elastic, dynamically stretched screen mats to prevent blinding with moist fines.
- Metso’s design combines high acceleration of mats with a rugged frame to tolerate severe vibration regimes.
- Flip-flow motion generates high relative particle movement on the mat, improving stratification of near-size material.
- Screen mats are typically modular and quickly replaceable, reducing downtime in abrasive ore and sand duties.
- The dry screening configuration avoids spray bars and pump circuits, simplifying plant layout where water is limited.
- Integration in HPGR recirculating loops allows sharper separation without additional wet classification stages.
- Reduced oversize misplacement from tighter classification can lower specific energy demand in downstream grinding.
Our Take
Metso’s new flip‑flow GFF screens sit alongside a run of recent product and technology launches in our database – from the Outotec Robotic Split Strip for copper electrorefining (2 April 2026) to upgraded Grate Kiln systems for DR‑grade iron ore pellets (29 March 2026) – signalling a push to cover more of the comminution‑to‑refining value chain with proprietary kit.
Across the 2,312 tag‑matched Projects/Product pieces in our coverage, relatively few focus on dry screening upgrades, so this launch gives Metso a chance to differentiate in brownfield debottlenecking work where water constraints or tailings risk are driving flowsheet changes.
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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