NVRO Metals advances commercial deployment on Greens Creek material

NVRO Metals Advances Commercial Deployment of the NVRO Process™ Through Successful Continuous Production Demonstration on Hecla Greens Creek Material

202-hour continuous production campaign generated engineering, operating and commercial data supporting future deployment of the NVRO Process™

VANCOUVER, British Columbia, Aug. 28, 2026 (GLOBE NEWSWIRE) -- NVRO Metals Limited (TSXV: NVRO | OTCQB: ESGLF | FSE: YGK) ("NVRO Metals" or the "Company") is pleased to announce the successful completion of a continuous production demonstration campaign using material from Hecla Mining Company's Greens Creek operation in Alaska as announced on 22 April 2026.

The campaign forms an important part of the Company's collaboration with Hecla Mining Company to evaluate the NVRO Process™ as a potential commercial processing solution for Greens Creek tailings material. The campaign successfully demonstrated continuous operation using customer feedstock under representative operating conditions and generated engineering, operating and metallurgical data to support future commercial deployment and investment decisions.

Highlights

Successfully completed 202 hours of continuous operation on Hecla Greens Creek material.

Campaign was preceded by 57.5 hours of commissioning and process stabilization.

Continuous operation was consistent with the Company's IDEAS™ digital process model.

Approximately 97% sulfide oxidation achieved during the campaign.

Approximately 70% reduction in solids mass achieved during leaching.

Preliminary operating results indicate: approximately 10.6-times silver upgrading from flotation feed to NVRO Process™ leach product;

approximately 10.8-times gold upgrading from flotation feed to NVRO Process™ leach product;

Full independent laboratory assays and complete metallurgical reconciliation remain in progress.

For more information, including important assumptions and requirement for independent accredited testing to be completed, see "Basis of Reported G