Envirogold obtains 99.6% Au recovery in phase 3 testing

Executive Summary

• Envirogold Global Ltd. announced exceptional Phase 3 metallurgical results from its proprietary NVRO Process applied to major tailings reprocessing projects.
• Independent testing at ALS Laboratories validated high recovery rates for gold and silver, with significant increases in concentrate grades compared to previous benchmarks.
• The project involves over 9 million tonnes of tailings with estimated gross in-situ metal values exceeding $3 billion USD, offering potential multiple revenue streams from precious metals and base/critical metals.

Key Details

• Gold Recovery: 99.55% of gold recovered to a saleable concentrate.
• Silver Recovery: 98.96% of silver recovered to a saleable concentrate.
• Gold Grade Increase: Gold in concentrate increased by 380%, rising from 5.5 g/t to 20.9 g/t.
• Silver Grade Increase: Silver in concentrate increased by 602%, rising from 92 g/t to 554 g/t.
• Base/Critical Metals: Base and critical metals reporting to the pregnant leach solution (PLS) increased by 8%.
• Model Validation: Strong correlation observed between laboratory results and Andritz IDEAS simulation modelling, confirming the reliability and scalability of the NVRO Process.
• Environmental Benefits: The plan aims for an 86% reduction in acid mine draining potential by reducing pyrite content and a 14% reduction in on-site tailings volumes.
• Production Volume: Estimated 1.2 million tonnes of saleable precious metal concentrates.
• Resource Value: Existing tailings facilities contain more than 9 million tonnes of material with gross in-situ metal values exceeding $3 billion (U.S.).
• Next Steps: Phase 4 of the rapid deployment pathway will validate mass balance, recovery performance, project economics, and environmental outcomes at scale.

Notable Quotes

• "These phase 3 results confirm the exceptional technical and economic potential of the NVRO Process to realize metal value from tailings while delivering exceptional environmental benefits." — Grant Freeman, Envirogold Global
• "I am proud of the work that our team and partners have achieved in 2025 delivering a combination of near total precious metal recovery, validation of our predictive process model, and the environmental benefits of pyrite and tailings volume reduction... These results highlight Envirogold's value proposition as a scalable, environmentally responsible solution for the global mining industry." — Royston Denysschen, Chief Operating Officer