Nova Minerals Confirms 216,000 tpa Processing Capacity at Port MacKenzie Antimony Plant

Anjali Anand

11 November 2026 12:32 PM AEDT

Nova Minerals Confirms 216,000 tpa Processing Capacity at Port MacKenzie Antimony Plant

Image Source: Krish Capital Pty Ltd

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Nova Minerals Corp (ASX:NVA) has disclosed that an engineering and processing capacity assessment of its newly acquired processing plant, to be constructed at Port MacKenzie, Alaska, has confirmed front-end crushing, grinding and concentration capacity of approximately 216,000 tonnes per annum (tpa), with capacity modelling indicating potential refined antimony production of up to approximately 20,000 tpa, subject to feed grade, additional downstream refinery equipment and other operating requirements.

Key Points

Engineering assessment confirms 216,000 tpa front-end processing capacity at the Port MacKenzie plant, comprising two parallel mill trains each with approximately 108,000 tpa capacity.
Phase 1 pilot-scale refinery targeting up to 600 tpa of refined antimony is being advanced under a fully funded US$43.4 million Department of War supported project, targeting domestic production of military-grade antimony trisulphide in 2027.
Capacity modelling indicates potential refined antimony production of approximately 9,400 tpa at a 5% feed grade and 20,000 tpa at a 10% feed grade, subject to additional downstream refinery equipment.
The plant infrastructure could also support processing of tungsten, gallium, bismuth, tellurium, arsenic and other critical mineral feedstocks.

Processing Plant Infrastructure at Port MacKenzie

The processing plant, previously owned and operated by Agnico-Eagle at the Hope Bay Gold Project, has been procured and delivered to Nova Minerals' Port MacKenzie site. The plant incorporates crushing, grinding, gravity, flotation and leaching circuits, together with associated equipment and engineering plans. A Steinert ore sorter has also been separately procured. The two parallel grinding mill trains, each with approximately 108,000 tpa capacity, provide operational flexibility and the ability to progressively expand production without requiring replacement of the major existing processing infrastructure, according to the filing.

Phase 1 Pilot-Scale Refinery and Hydrometallurgical Flowsheet

Nova Minerals is advancing its Phase 1 refinery under the US$43.4 million Department of War supported project. Based on metallurgical test-work, the company has developed a hydrometallurgical flowsheet incorporating leaching, electrowinning, melting and sulphurisation to produce military-grade antimony trisulphide, with standard Grade II antimony metal of greater than 99.65% purity as an intermediate co-product. The initial refinery is designed to produce up to approximately 600 tpa of refined antimony, with electrowinning capacity representing the principal production constraint, the filing states.

Commercial Expansion Scenarios and Multi-Commodity Processing Potential

Following Phase 1 completion, the filing states that the principal expansion requirement would be additional downstream refining capacity, specifically electrowinning and melting capacity, with no additional primary crushing, sorting or grinding equipment required under the modelled production scenarios. The 216,000 tpa processing platform is also disclosed as capable of supporting processing of suitable third-party ores and concentrates and evaluating additional critical mineral commodities including tungsten, gallium, bismuth, tellurium and arsenic. The facility is also intended to support processing of feedstock from Nova's Estelle Project and potentially suitable third-party mineral sources.

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