Nova flexes 216,000tpa antimony processing capacity in Alaska

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Nova Minerals' Alaska antimony facility has 216,000tpa front-end processing capacity, with pilot-scale production targeted for 2027. ... Read More The post Nova flexes 216,000tpa…

Big things are expected at Nova’s newly-acquired processing plant in Alaska. Pic: Getty Images

Special Report: Nova Minerals has confirmed its Port MacKenzie plant, which is being prepared for installation in Alaska, will have capacity for around 216,000 tonnes a year of crushing, grinding and concentration, with modelling indicating antimony production of up to 20,000 tpa.

The engineering and capacity assessment is based on the plant’s two parallel grinding circuits, each with capacity of about 108,000tpa. That gives Nova the option to stage future development and handle suitable additional mineral feedstocks without replacing the major front-end plant.

The newly assessed processing plant comprises two parallel grinding circuits, each with capacity of about 108,000tpa. That gives Nova the option to stage future development and handle suitable additional mineral feedstocks without replacing the major front-end plant.

The modern turnkey facility was previously owned and operated by Agnico-Eagle at its Hope Bay Gold Project. It has now been procured and delivered to Port MacKenzie, with crushing, grinding, gravity, flotation and leaching circuits, associated equipment and engineering plans. Nova has also separately secured a Steinert ore sorter.

Nova Minerals’ (ASX:NVA) first priority remains the pilot-scale refinery being advanced under its fully funded US$43.4 million US Department of War-supported project.

Phase 1 is designed for up to 600tpa of refined antimony, producing military-grade antimony trisulphide with more than 99.65% pure Grade II antimony metal as an intermediate co-product. The company is targeting initial production in 2027.

The gap between the pilot’s refined output and the plant’s much larger front-end throughput is deliberate. The initial refinery’s main limit is its electrowinning capacity, rather than the amount of material the grinding circuit could process.

Modelling indicates that, with sufficient suitable feed and additional downstream refining…

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