RZOLV Technologies achieved a significant milestone in gold extraction technology, reporting approximately 97% gold recovery from complex copper-gold ore without requiring pretreatment processes that typically complicate mining operations.
The Vancouver-based clean-technology company announced Wednesday that its proprietary RZOLV formula successfully extracted gold from ore containing 9.6 grams per tonne of gold and 2.12% copper. The tested material comes from an alkaline gold-copper porphyry system with low-sulphidation epithermal mineralization.
Technology Targets Expanding Market Segment
The mining industry continues seeking alternatives to cyanide-based processing due to environmental concerns, regulatory pressure, and social license considerations. Companies developing proven alternatives that maintain high recovery rates while reducing operational complexity could capture significant market share as the industry transitions toward more sustainable practices.
Copper interference challenges conventional processing
Mining engineers consider copper-bearing gold ores among the most challenging materials for conventional cyanide processing. Copper minerals dramatically increase cyanide consumption and create complex solution management problems that force operators to install expensive additional circuits to handle the interference.
"This is an important result for RZOLV because it goes well beyond recovery alone," said Duane Nelson, President and CEO of RZOLV Technologies. "To achieve this high gold recovery on a copper-bearing complex ore without pretreatment suggests that RZOLV may offer a practical alternative in mineral systems where cyanide can become penalized by copper."
Test results demonstrate progressive recovery
The company believes its technology could eliminate the need for SART circuits, which mining operations typically add to precipitate copper sulphide and recover cyanide for recycling when copper interference becomes significant. Technical publications from SGS, a leading testing and certification company, confirm that copper minerals materially increase cyanide consumption and complicate solution management in gold processing operations.
RZOLV Technologies conducted bottle roll leach tests on the subject material under controlled laboratory conditions. Technicians crushed a 150-gram sample to -500 micrometers and ran the test for 168 hours at 20% pulp density, collecting solution samples at regular intervals to track gold recovery progress.
The test results showed steady gold recovery improvement over time, climbing from approximately 34% at 24 hours to nearly 97% at 168 hours. Company scientists monitored process pH and oxidation-reduction potential throughout testing and submitted final solid residues to ALS Laboratories for independent verification.
Technology eliminates pretreatment requirements
The breakthrough technology addresses multiple challenges that plague conventional gold processing operations. Companies often must install complex pretreatment systems and additional processing circuits when dealing with copper-bearing ores, adding substantial costs, technical complexity, and permitting requirements to mining projects.
Nelson emphasized that avoiding pretreatment requirements could significantly improve project economics. "If supported by further work, this could translate into simpler plant design, lower capital costs, lower reagent penalty, and the potential to avoid the need for a costly SART circuit that might otherwise be required under a cyanide flowsheet," he explained.
Multiple operational benefits expected
The company expects several practical benefits from its technology breakthrough. Mining operations could potentially eliminate separate copper-cyanide management circuits, reducing capital requirements by avoiding SART plants and supporting infrastructure. Simplified processing would reduce operating complexity through fewer unit operations and less process management associated with copper-cyanide recycling.
RZOLV Technologies believes improved project economics will particularly benefit lower-grade or copper-bearing gold operations where processing costs remain highly sensitive to reagent consumption and circuit complexity. The technology also expands market opportunities for ore types that fall within conventional cyanide penalty categories.
Company positions technology as cyanide alternative
The absence of pretreatment requirements represents a particularly encouraging development for the mining industry. Pretreatment steps typically add substantial cost, time, technical complexity, and permitting burden to projects. Demonstrating high gold recovery without such steps could improve commercial attractiveness for complex ore bodies that challenge conventional processing methods.
RZOLV Technologies has positioned itself as a clean-technology company developing next-generation hydrometallurgical chemistry to transform precious and critical metals recovery. The company focuses on proprietary, non-cyanide solutions designed to unlock value from complex materials where conventional methods face limitations.
Future testing plans target scale-up parameters
The flagship RZOLV technology operates as a proprietary, water-based dissolution system designed to achieve strong recovery performance without the toxicity, permitting burden, and legacy liabilities associated with conventional cyanide-based processes. Company engineers believe the technology's broader and more controllable chemical operating window enables precious and critical metals recovery from challenging feedstocks while supporting safer, more sustainable mining practices.
Next phase focuses on commercial validation
The company plans to continue metallurgical work evaluating recovery performance, reagent optimization, and scale-up parameters across different ore types and geological settings. Future testing programs will examine the technology's performance on various complex mineralization styles to establish broader commercial applicability.
RZOLV Technologies expects to advance toward pilot-scale testing as the next phase of technology validation. The company aims to demonstrate consistent performance parameters that mining companies require for feasibility studies and project development decisions.
Market implications for mining industry
Industry analysts consider copper-bearing gold ores a significant market opportunity, as many existing operations struggle with economic penalties from conventional processing methods. The successful development of alternative extraction technologies could unlock previously uneconomical resources and improve margins for existing operations facing copper interference challenges.
More information is available at www.Rzolv.com
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