EnviroGold Global Announces Outstanding Phase 3 Metallurgical Results from Major Tailings Reprocessing Projects

Executive Summary

• EnviroGold Global announced independently‑validated Phase 3 test results for its NVRO Process™, showing >99.5% recovery of gold and silver to saleable concentrate.
• Concentrate grades surged (gold from 5.5 g/t to 20.9 g/t; silver from 92 g/t to 554 g/t), indicating a strong economic upside for tailings reprocessing projects.
• The results also demonstrate significant environmental benefits, including an estimated 86% reduction in acid‑mine‑drainage potential and a 14% cut in on‑site tailings volume.

Key Details

• Metallurgical Recoveries (independent ALS Labs test):
• Gold recovery: 99.55 % to concentrate.
• Silver recovery: 98.96 % to concentrate.
• Gold grade in concentrate increased 380 % (5.5 g/t → 20.9 g/t).
• Silver grade in concentrate increased 602 % (92 g/t → 554 g/t).

• Base and critical metals reported to pregnant leach solution (PLS) rose 8 %.

• Process Validation: Strong correlation between laboratory results and Andritz IDEAS simulation modelling, confirming scalability of the NVRO Process™.

• Environmental & Sustainability Benefits (project‑specific):

• 86 % reduction in acid‑mine‑draining potential via pyrite reduction.
• Production of 1.2 million tonnes of saleable precious‑metal concentrate.
• Additional revenue from base and critical metals recovered from PLS.

• 14 % reduction in on‑site tailings volumes.

• Economic Opportunity: Tailings inventory at the customer site exceeds 9 million t, with gross in‑situ metal values estimated > US$3 billion (primarily gold and silver).

• Path Forward – Phase 4: Will validate mass balance, recovery performance, project economics, and environmental outcomes at commercial scale.

• Management Commentary:

• Grant Freeman (CEO) highlighted the “exceptional technical and economic potential” of the NVRO Process™.
• Royston Denysschen (COO) emphasized near‑total precious‑metal recovery, predictive model validation, and significant environmental benefits.

Notable Quotes

• Grant Freeman, CEO: “These Phase 3 results confirm the exceptional technical and economic potential of the NVRO Process™ to realise metal value from tailings while delivering exceptional environmental benefits.”
• Royston Denysschen, COO: “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.”