Asante begins sulphide plant operations at Bibiani

Executive Summary

• Asante Gold Corp. began 12‑hour‑per‑day operations at its new Bibiani sulphide treatment plant on Sept. 27, 2025, with a transition to 24‑hour operation slated for Sept. 30, 2025.
• The plant is expected to boost gold recovery from ~60 % to >92 % by late October 2025, supporting an LOM recovery increase and contributing toward the company’s target of 450‑500k oz annual production.
• Project costs are on budget ($32 M spent vs. $32 M budgeted) and health & safety metrics remain at zero lost‑time incidents year‑to‑date.

Key Details

• Health & Safety: Lost‑time incident frequency rate = 0.00; total recordable incident frequency rate = 0.00 (YTD 2025).
• Project Cost: Total spend to date $32 M (U.S.) – fully aligned with the original budget.
• Construction Status: Construction and commissioning of the sulphide plant are complete.
• Production Ramp‑Up:
• 12‑hour‑per‑day operation started Sept. 27, 2025.
• 24‑hour‑per‑day operation expected to begin Sept. 30, 2025.
• Optimization through October 2025 to achieve >85 % recovery initially, progressing to >92 % by late October 2025.
• Life‑of‑Mine Recovery: Expected increase from 60 % to 92 % gold recovery by late Oct. 2025.
• Plant Capacity: Nameplate throughput of 4 million tonnes per year.
• Technical Highlights:
• Approximately 30 % of gold in ore <110 m depth occurs within sulphide mineralisation (average grain size ~35 µm).
• Process flow includes flotation, re‑grind to 25 µm, high‑intensity leach with elevated O₂ (Aachen reactor), and carbon‑in‑pulp (CIP) for gold recovery.
• Supply Chain Partners:
• Process test work – ALS (Australia).
• Major equipment suppliers – FLSmidth (US), MO Group (Europe), Maelgywn (South Africa).
• Design – Mining Process Project Engineering (MiningPro – Ghana Ltd.).
• Project management – Jet‑Rom Engineering (Ghana).
• Strategic Outlook: CEO Dave Anthony notes the plant’s start enables execution of a strategic plan to allocate capital to Bibiani and Chirano, targeting long‑term production of 450‑500 k oz gold per year.
• Earnings Webcast: Replay of the July 31, 2025 quarter earnings call is now available on Asante’s website.

Notable Quotes

“With construction and commissioning of the Bibiani sulphide treatment plant complete, we are focused on the next phase, which moves the plant into operation, ramp‑up, testing and optimization to achieve 92‑percent recovery and enhance Bibiani's growth profile.” – Dave Anthony, President & CEO.