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Aya Gold & Silver Surpasses Nameplate Milling Capacity at Zgounder Silver Mine’s New Processing Plant

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Aya Gold & Silver Inc.
Aya Gold & Silver Inc.

MONTREAL, Jan. 23, 2025 (GLOBE NEWSWIRE) -- Aya Gold & Silver Inc. (TSX: AYA; OTCQX: AYASF) (“Aya” or the “Corporation”) is pleased to announce that it has reached and surpassed the nameplate milling capacity at its 100% owned Zgounder Mine located in the Kingdom of Morocco.

The new plant began processing ore on November 4th, 2024. The first silver pour was achieved on November 27th, with commercial production reached on December 29th, less than two months after the new plant began processing the first ore.

Over a consecutive 30-day period ending on January 20th, 2025, the new plant processed a total of 65,990 tonnes (“t”) of ore, an average of 2,200 tonnes per day (“tpd”), and equivalent to 110% of nameplate capacity. Processing rates averaged 96 tonnes per hour (“tph”), at 96% availability. Silver recovery was 85%.

Between January 11th and January 20th, mill throughput averaged 2,239 tpd, with mill availability and silver recovery at 98% and 89%, respectively. Recovery improved consistently as processing parameters were adjusted and grade fed to the plant increased.

As of January 18th, the flotation plant slurry was successfully integrated into the new plant’s leaching circuit. Since then, the combined processing rate of both plants has averaged over 2,900 tpd with a recovery rate exceeding 90%. This integration enables the exclusive production of silver doré, eliminating the previous mix of silver concentrate and doré, increasing the payable value of silver produced.

In the coming months, the goal is to stabilize the combined processing rate at Zgounder above 3,000 tpd while maintaining or exceeding the recovery rate of 89% determined in the feasibility study.

Soutex, a Canadian consulting firm specializing in mineral processing and metallurgy, recently conducted a study analyzing the time required to ramp up mineral processing plants from the first ore in the mill to achieving nameplate capacity (Figure 1). The study identified the new Zgounder plant as delivering amongst the quickest ramp-up performance to nameplate capacity, showcasing the robustness of the plant.

“I am proud to announce the ramp-up of the new plant at Aya’s expanded Zgounder mine, where we are now operating above nameplate capacity just weeks after achieving commercial production,” commented President & CEO Benoit La Salle. “The performance of the now integrated operations at Zgounder reflects the exceptional expertise and commitment of the Aya team and sets the stage for strong production performance in 2025.”

Figure 1 – The dataset below was compiled by Soutex and shows the ramp up time for Zgounder’s new plant to reach design capacity, which is the shortest (tied with another project) compared to 100+ other mineral processing plants. Database from Rollins and Lam (2017) [1] in comparison with Soutex’s experience [2].