IsaMill at 30: fine grinding efficiency lessons for concentrator engineers
Reviewed by Tom Sullivan
First reported on International Mining – News
30 Second Briefing
Glencore Technology is marking 30 years of the IsaMill fine grinding mill, first developed by Mount Isa Mines and NETZSCH to tackle complex, ultra-fine regrind duties in base metal circuits. The horizontal, high-intensity stirred mill has since been deployed in more than 130 installations globally, often replacing ball mills in the sub-20 µm range to cut specific energy consumption and increase throughput. Recent IsaMill developments focus on larger M-series units, improved ceramic media wear performance and integration with modern flotation and coarse particle recovery flowsheets.
Technical Brief
- IsaMill was co-developed by Mount Isa Mines and NETZSCH to address a specific complex metallurgy problem.
Our Take
In our database, Glencore Technology’s recent pieces are dominated by the Jameson Cell and Albion Process, so the IsaMill’s 30‑year milestone underlines how Glencore is now marketing a full ‘suite’ of proprietary comminution and flotation technologies rather than single-point solutions.
The cluster of Glencore Technology items at Antapaccay, Mogalakwena North and South32’s Hermosa project suggests IsaMill will increasingly be pitched as the grinding backbone for the same compact, high-recovery flowsheets where Jameson Cells are already being adopted.
With more than 1,200 mining stories and over 2,400 tag-matched pieces in our coverage, Glencore Technology stands out as one of the few OEM-style players repeatedly featured for both brownfield upgrades and greenfield designs, signalling that IsaMill’s longevity is being leveraged to de-risk newer technologies in the same circuits.
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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