Resolf techniques The company has achieved a significant milestone in gold extraction technology, reporting approximately 97% gold extraction from complex copper-gold ore without the need for pre-treatment processes that typically complicate mining operations.
The Vancouver-based clean technology company announced Wednesday that its RZOLV formulation successfully extracted gold from ore containing 9.6 grams per tonne of gold and 2.12% copper. The material tested comes from a gold-copper alkaline porphyry system with low-sulphur refractory mineralization.
Technology aims to expand the market segment
The mining industry continues to search for alternatives to cyanide-based processing due to environmental concerns, regulatory pressures and social licensing considerations. Companies that develop proven alternatives that maintain high recovery rates while reducing operational complexity could capture significant market share as the industry shifts toward more sustainable practices.
Copper interference challenges conventional processing
Mining engineers consider copper-bearing gold ores to be among the most challenging materials for conventional cyanide processing. Copper minerals greatly increase cyanide consumption and create complex solution management problems that force operators to install expensive additional circuits to deal with interference.
“This is an important result for RZOLV because it goes beyond recovery alone,” said Duane Nelson, President and CEO of RZOLV Technologies. “To achieve such high gold recovery on a complex copper-containing ore without pretreatment suggests that RZOLV may offer a practical alternative in mineral systems where cyanide can be punished by copper.”
Test results show gradual recovery
The company believes its technology could eliminate the need for SART circuits, which mining operations typically add to precipitate copper sulfide and recover cyanide for recycling when interference with copper becomes significant. Technical publications from SGS, a leading testing and certification company, confirm that copper minerals significantly increase cyanide consumption and complicate solution management in gold processing operations.
RZOLV Technologies conducted bottle roll filtration 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 the progress of gold recovery.
Test results showed a consistent improvement in gold recovery over time, rising from approximately 34% in 24 hours to approximately 97% in 168 hours. Company scientists monitored the process’s pH and oxidation-reduction potential throughout testing and submitted the final solid waste to ALS Laboratories for independent verification.
The technology eliminates pretreatment requirements
This advanced technology addresses many of the challenges facing traditional gold processing operations. Companies often have to install complex pre-treatment systems and additional processing circuits when dealing with copper-bearing ore, which adds significant costs, technical complexity and permitting requirements to mining projects.
Nelson stressed that avoiding pretreatment requirements can significantly improve project economics. “If supported by further work, this could translate into a simpler plant design, lower capital costs, a lower reagent penalty, and potentially avoiding the need for an expensive SART circuit that would be required under a cyanide flow scheme,” he explained.
Multiple operational benefits are expected
The company expects many practical benefits from its technological breakthrough. Mining operations could potentially eliminate separate copper cyanide management circuits, reducing capital requirements by avoiding SART plants and supporting infrastructure. Simplified processing reduces operational complexity through fewer unit operations and less process management associated with copper cyanide recycling.
RZOLV Technologies believes the 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. This technology also expands market opportunities for ore types that fall within traditional cyanide penalty categories.
The company is positioning the technology as an alternative to cyanide
The absence of pre-treatment requirements represents a particularly encouraging development for the mining industry. Preprocessing steps typically add significant cost, time, and technical complexity and allow burden on projects. Demonstrating a high rate of gold recovery without such steps could improve the commercial appeal of complex ore bodies that defy traditional processing methods.
RZOLV Technologies has positioned itself as a clean technology company developing the next generation of aqueous metal chemistry to transform the recovery of precious and critical metals. The company focuses on proprietary, non-cyanide solutions designed to unlock value from complex materials where traditional methods face limitations.
Future testing plans target expansion criteria
RZOLV’s pioneering technology operates as a proprietary water-based dissolution system designed to achieve robust extraction performance without the toxicity, tolerance burden and legacy liabilities associated with traditional cyanide-based processes. The company’s engineers believe that the technology’s wider and more controllable chemical operating window enables the recovery of precious and critical metals from difficult feedstocks while supporting safer and more sustainable mining practices.
The next phase focuses on commercial verification
The company plans to continue mineral work to evaluate recovery performance and optimize detector and expansion parameters across different ore types and geological settings. Future testing programs will examine the performance of the technology in various complex mineralization patterns to establish broader commercial applicability.
RZOLV Technologies expects to progress toward pilot testing as the next stage of technology validation. The company aims to demonstrate the consistent performance standards that mining companies need for feasibility studies and project development decisions.
Market impacts on the mining industry
Industry analysts consider copper-bearing gold ores to represent a significant market opportunity, with many existing operations suffering from economic penalties caused by traditional processing methods. Successful development of alternative extraction technologies can unlock previously uneconomic resources and improve margins for existing operations facing copper interference challenges.
More information is available at www.Rzolv.com
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