Benz Mining gold recoveries at Glenburgh: flowsheet and cost lens for engineers
Reviewed by Tom Sullivan
First reported on Australian Mining
30 Second Briefing
Benz Mining has reported initial metallurgical testwork from the Icon camp at its Glenburgh gold project in Western Australia showing the ore is free milling, with composite samples from the higher-grade core achieving about 95.5 per cent gold extraction within 24 hours. The results suggest conventional cyanide leach flowsheets and standard grinding may be sufficient, reducing the likelihood of requiring refractory processing or complex pre-treatment. For project evaluation, such rapid, high recoveries materially improve potential plant design simplicity, operating costs and cut-off grade assumptions.
Technical Brief
- Metallurgical testwork was conducted on composite samples from the Icon camp’s higher‑grade core zone.
- Free-milling behaviour implies minimal sulphide encapsulation, favouring gravity and direct cyanidation over oxidation.
- Early confirmation of amenable metallurgy allows scoping of a conventional CIL/CIP plant rather than pressure oxidation.
- Simpler flowsheet options reduce requirements for complex reagent suites, high-pressure vessels and associated maintenance regimes.
- Process plant power demand and water balance can be optimised without energy-intensive ultra-fine grinding circuits.
- Project economics at Glenburgh become more sensitive to mining dilution and geometallurgical domaining than to processing complexity.
Our Take
Benz Mining’s Glenburgh corridor has also shown widespread tungsten mineralisation in earlier work, so strong gold recoveries here point to a potentially valuable polymetallic system rather than a single-commodity play.
Across our gold project coverage in Western Australia, rapid leach kinetics approaching full extraction within 24 hours are typically associated with simpler processing routes, which can materially reduce both plant complexity and operating costs at assets like Glenburgh’s Icon camp.
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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