MMD HYD Sizer for rare earths: design and throughput notes for plant engineers
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
MMD Australia is targeting rare earth element projects with its next-generation HYD Sizer, redesigned for variable ore hardness, higher moisture contents and tighter product size control than earlier MMD sizers. The unit incorporates hydraulic drive and modular tooth configurations to handle both soft overburden and abrasive rare earth-bearing ores in a single machine, reducing the need for multiple crushing stages. For geometallurgy and plant designers, the HYD Sizer’s adaptability to changing feed characteristics offers flexibility for deposits with complex mineralogy and fluctuating throughput.
Technical Brief
- For similar REE projects, single-sizer layouts could shorten commissioning schedules and reduce civils complexity.
Our Take
Within our 1200 Mining stories, rare earth elements appear far less frequently than iron ore or gold, so MMD’s positioning around this commodity in Australia signals a push into a niche where equipment vendors can secure higher-spec, higher-margin process roles.
For Australian rare earth elements projects, which often deal with variable ore textures and tight environmental constraints, MMD-style sizers can allow smaller footprints and lower dust generation than conventional crushers, an operational angle that tends to resonate with local permitting and ESG expectations.
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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