Conventional gold mining

The Problem

Cyanide is the leading gold extraction agent. It is effective and low cost, but it is a toxic chemical that creates significant environmental risk for mine operators and local communities. It is increasingly opposed by many communities, NGO’s, governments, agencies and investors.

Other miners produce gold concentrates that are shipped to smelters for processing. Payment times are lengthy, shipping and logistics costs are considerable, processing costs are high.

Environmental and carbon footprint of both existing processes are high.

Our Solution

EnviroMetal’s chemistry formulations recover gold from gravity and flotation concentrates with similar effectiveness and costs to cyanide. We allow concentrate producers to recover gold doré on site. We help gold producers reduce processing costs and environmental footprints in many cases.

“We help gold producers reduce processing costs and environmental footprints in many cases.”

EnviroMetal’s Advantages


• Gold recovery rates comparable to cyanide
• Leach kinetics comparable to cyanide
• Chemical costs comparable to cyanide
• Costs vs shipping concentrates to downstream smelters


• Reliance on smelters
• Environmental footprint
• Permitting, monitoring and remediation costs
• Water usage – no water effluent


• Access to environmentally sensitive areas
• Operator sustainability and CSR profile
• Stakeholder support of mining projects

How we compare

EnviroMetal Gold Recovery vs Cyanide

Independent testing completed by SGS

Gold Mining Business Model

EnviroMetal has little or no competition in the mining sector for economic, sustainable alternatives to cyanide.

We also offer significant value to gold miners who produce concentrate materials, but who would prefer to recover gold on-site rather than incur costs for downstream processing. Our technical advantages and early mover status in this market position us as to be a dominant player.

EnviroMetal’s gold sector strategy is based on a licensing and royalty model.

Printed Circuit Board Assembly (PCBA) Processing


E-Waste is a global issue. It is the fastest-growing portion of the municipal waste stream expected to grow to 67.2 million tonnes by 2026. The volume of produced recycled PCBA’s from E-Waste is expected to exceed 3.1 million tonnes annually.


The highest value components in E-Waste are printed circuit board assemblies (PCBA’s). PCBA’s are typically processed by smelters outside North America.

About PCBA Processing

PCBA’s are a highly complex and heterogeneous group of materials. PCBA’s also vary greatly in metal content.

EnviroMetal’s target feedstock is low to mid-grade PCBA’s. These boards typically contain over $4,000 USD worth of metals per tonne.

This is significantly higher than the typical $100 – $500 USD per tonne of conventional mining ores.

EnviroMetal’s Advantages
• Effective recoveries of precious metals
• Cost competitive to incumbent processes
• Environmentally sustainable process
• Higher payable metals
• Lower Emissions
• Avoids landfill of hazardous waste
• Domestic treatment solution
• Operates at ambient temperature
• No wastewater produced
• No off-gassing
• Small operational footprint

EnviroMetal’s target feedstock is low to mid-grade PCBA’s. These boards typically contain over $4,000 USD worth of metals per tonne.

EnviroMetal’s Solution

EnviroMetal offers a cost-effective, sustainable, domestic solution for the treatment of printed circuit boards. EnviroMetal is also developing hydrometallurgical recovery applications for tin and copper, which present the potential for significantly increased operating margins. Our solution integrates with ESG multiple principles and provides a valuable solution for the adoption of Circular Economy for metals and electronics industries.

About Tin

Tin is widely used as solder in PCBA’s. Low grade PCBA’s typically contain higher percentages of tin than high grade boards. Although PCBA’s are almost exclusively processed by smelters, tin is not a payable metal. Yet, the value of tin can represent as much as $950, which is unrealized value.

The E-Waste Circular Economy

PCBA Processing Operations

Located in Metro Vancouver, Canada, EnviroMetal’s 24,000 square foot PCBA processing facility has 2,400 tonne per year throughput capacity. The plant includes state of the art grinding and separation circuits as well as a proprietary chemical leach circuit that uses our patented and reusable formulation. Final facility upgrades are being completed in Q3 2021. EnviroMetal’s PCBA processing business unit achieved commercial revenue in Q2 2021 and expects to enter a revenue growth phase late 2021.

EnviroMetal is building a diversified, international supply chain of recycled PCBA’s and plans to increase operational capacity in North America commencing in 2022.




Find out more about our technology