Renascor Resources Limited (RNU) has released a new cost study confirming the economic potential of its hydrofluoric acid (HF) free purification process for battery-grade graphite. The company estimates operating costs of approximately US$459/t for its proprietary method, which is designed to produce Purified Spherical Graphite (PSG) with 99.99% carbon purity. By eliminating the use of HF, the process avoids the significant health, safety, and environmental disposal costs typically associated with conventional purification techniques used in Western battery supply chains.

The study is based on a conceptual design for a commercial facility in Bolivar, South Australia, with an annual processing capacity of 50,000 tonnes. Renascor’s process incorporates a sulfuric acid leach and low-temperature caustic bake, coupled with an integrated water treatment circuit that facilitates reagent recycling. This technical approach is aimed at establishing a commercially viable, non-Chinese alternative for the lithium-ion battery anode market.

"As global battery supply chains increasingly seek competitive ex-China sources of battery materials, Renascor's strategy is to combine the scale and quality of the Siviour Graphite Deposit with downstream PSG processing in South Australia to establish an integrated Australian mine-to-PSG operation."

"The work currently being undertaken through Renascor's PSG demonstration plant program is intended to validate this value proposition by generating the operating data, cost information and qualification samples required to support engagement with anode and cell manufacturers, advance customer qualification programs and progress offtake and strategic partnership discussions."
— David Christensen, Managing Director

The company is currently in the commissioning phase for its Australian Government co-funded demonstration plant. This facility is critical for the next stage of development, as it will serve to validate engineering parameters and provide product samples for ongoing offtake negotiations with potential strategic partners. Data derived from this plant will be used to finalize the design for the proposed full-scale commercial operation.

Read the full announcement: Cost Study Supports Low-Cost PSG Purification Process