Every feed material presents unique challenges. Our alkaline pressure oxidation platform adapts to these variations through parameter optimization. We've successfully processed feeds others reject, each required different approaches within our core process framework.
Validated Feed Types
Materials We've Successfully Processed at SGS Lakefield
Cobalt-Arsenic Assemblages
Beaver Tailings: 49.9% As, 10.2% Co feed processed to <0.5% As concentrate and battery-grade cobalt sulfate meeting Sumitomo specifications
Refractory Materials
Granada Gold Mine's alkaline/REE program demonstrating recovery from previously unprocessable silicate-hosted mineralization
Secondary Materials
Call2Recycle sourced battery black mass processing, proving platform adaptability to recycled feed sources
24-48 hour
24-48 hour
Entire Processing cycle
Up to 50%
Up to 50%
Arsenic Feed range
Arsenic Feed range
99%+
99%+
Final Product purity
Technical Process
The Re-2Ox Process: Staged Extraction for Maximum Recovery
01
Alkaline Pressure Oxidation
High-temperature alkaline treatment breaks down refractory mineral matrices, liberating penalty elements while protecting valuable metals from oxidation
02
Selective Precipitation
Controlled pH adjustment precipitates arsenic into a stable form while maintaining base metals in solution for subsequent recovery
03
Solution Purification
Multi-stage impurity removal through controlled precipitation and separation, ensuring metal streams meet customer specifications while penalty elements are stabilized for disposal.
04
Product Recovery
Crystallization, electrowinning, or other finishing steps produce final products tailored to customer specifications
Partnership Approach
From Bench to Commercial Scale: Our collaboration with SGS Lakefield enables systematic scale-up from gram-scale screening to continuous pilot operation. Each program follows rigorous stage-gate advancement: mineralogical characterization, bench optimization, pilot demonstration, and engineering design. This disciplined approach de-risks deployment for our partners.
Frequently Asked Questions: Re-2Ox embodies circular economy principles through closed-loop water management, reagent regeneration, and resource recovery from waste streams.
What happens to the arsenic after removal?
We convert dispersed arsenic contamination into compact, stable forms reducing volume by 10:1. Third-party testing confirms long-term stability. This transforms an uncontrolled liability into a manageable, regulated material with clear chain-of-custody.
How much water does the process consume?
Our closed-circuit design recycles >95% of process water. Filtrates and rinses return to the plant water system. This matters in water-stressed regions where mines face increasing restrictions on freshwater usage.
Can the process handle variable feed composition?
Real-time monitoring with automated control bands adjusts to ore variability. We've successfully processed feeds ranging from 5% to 49.9% arsenic across different mineralogies. The modular design allows parameter adjustment without hardware changes.
What's the power requirement and carbon footprint?
All-electric operation using 50-75 kWh per tonne processed. No combustion equipment means we can leverage renewable grid power where available. This represents 40% lower emissions than roasting and avoids producing arsenic trioxide gas.
How does this integrate with existing mine operations?
Modular units tie into existing utilities and can process multiple waste streams - tailings, concentrates, smelter dust. We return cleaned water to plant circuits and can recover valuable metals that offset processing costs, supporting brownfield optimization without major infrastructure changes.
What about reagent costs and availability?
We use standard, widely available reagents (caustic, sulfuric acid, lime) with >90% regeneration through closed loops. No exotic chemicals or scarce materials. This ensures predictable opex and supply chain resilience.
What happens to the arsenic after removal?
We convert dispersed arsenic contamination into compact, stable forms reducing volume by 10:1. Third-party testing confirms long-term stability. This transforms an uncontrolled liability into a manageable, regulated material with clear chain-of-custody.
How much water does the process consume?
Our closed-circuit design recycles >95% of process water. Filtrates and rinses return to the plant water system. This matters in water-stressed regions where mines face increasing restrictions on freshwater usage.
Can the process handle variable feed composition?
Real-time monitoring with automated control bands adjusts to ore variability. We've successfully processed feeds ranging from 5% to 49.9% arsenic across different mineralogies. The modular design allows parameter adjustment without hardware changes.
What's the power requirement and carbon footprint?
All-electric operation using 50-75 kWh per tonne processed. No combustion equipment means we can leverage renewable grid power where available. This represents 40% lower emissions than roasting and avoids producing arsenic trioxide gas.
How does this integrate with existing mine operations?
Modular units tie into existing utilities and can process multiple waste streams - tailings, concentrates, smelter dust. We return cleaned water to plant circuits and can recover valuable metals that offset processing costs, supporting brownfield optimization without major infrastructure changes.
What about reagent costs and availability?
We use standard, widely available reagents (caustic, sulfuric acid, lime) with >90% regeneration through closed loops. No exotic chemicals or scarce materials. This ensures predictable opex and supply chain resilience.
What happens to the arsenic after removal?
We convert dispersed arsenic contamination into compact, stable forms reducing volume by 10:1. Third-party testing confirms long-term stability. This transforms an uncontrolled liability into a manageable, regulated material with clear chain-of-custody.
How much water does the process consume?
Our closed-circuit design recycles >95% of process water. Filtrates and rinses return to the plant water system. This matters in water-stressed regions where mines face increasing restrictions on freshwater usage.
Can the process handle variable feed composition?
Real-time monitoring with automated control bands adjusts to ore variability. We've successfully processed feeds ranging from 5% to 49.9% arsenic across different mineralogies. The modular design allows parameter adjustment without hardware changes.
What's the power requirement and carbon footprint?
All-electric operation using 50-75 kWh per tonne processed. No combustion equipment means we can leverage renewable grid power where available. This represents 40% lower emissions than roasting and avoids producing arsenic trioxide gas.
How does this integrate with existing mine operations?
Modular units tie into existing utilities and can process multiple waste streams - tailings, concentrates, smelter dust. We return cleaned water to plant circuits and can recover valuable metals that offset processing costs, supporting brownfield optimization without major infrastructure changes.
What about reagent costs and availability?
We use standard, widely available reagents (caustic, sulfuric acid, lime) with >90% regeneration through closed loops. No exotic chemicals or scarce materials. This ensures predictable opex and supply chain resilience.
