Post: Low-Grade Gold Projects Just Got a Lifeline—Thanks to RZOLV

RZOLV - Staff writer - November 14, 2025

For decades, low-grade gold deposits—especially those processed through heap leach pads or vat leach operations—have lived on the economic edge. Their margins are razor-thin, their recoveries unpredictable, and their reliance on cyanide presents constant environmental, regulatory, and reputational headwinds.

But a Canadian clean-technology breakthrough is giving these projects something they haven’t had in a long time: breathing room. That breakthrough is RZOLV™, a non-cyanide, water-based gold leaching solution engineered to make low-grade operations profitable, safer, and easier to permit.

A Simple Chemistry Shift with Outsized Impact

Heap and vat leaching are the workhorses of the gold industry. They’re inexpensive to build, cheap to operate, and ideal for low-grade ore bodies that can’t justify a milling plant. Their Achilles heel has always been recovery: slow kinetics, uneven percolation, ore variability, and poor performance on oxidizes, sulfides, and complex copper/gold minerals.

RZOLV addresses these weaknesses—not with new infrastructure, but simply by replacing cyanide. The results are striking:

• Faster Kinetics = More Gold, More Quickly – RZOLV dissolves gold at a significantly faster rate than cyanide in many low-grade ores.

• Higher Recovery on Difficult Ores Low-grade material often contains, sulfides, or partially oxidized zones that choke cyanide.

• Works at Low Concentrations - Unlike cyanide, which often must be maintained at higher levels to overcome ore losses, RZOLV remains effective at controlled, low concentration—reducing consumption and operating cost.

  
  

Vat Leach Projects Benefit Even More

Vat leaching—essentially a controlled, flooded version of heap leaching—has long been limited by slow cyanide penetration and passivation of gold surfaces. RZOLV’s chemistry breaks through these barriers:

• Better gold exposure

• Broader mineral applicability

• Higher per-vat yields

• More predictable outcomes

• Lower reagent costs on complex ores

In a vat leach system, even small improvements in reaction speed have outsized economic impact because the ore is held in a fixed vessel. Faster turnover equals more gold per year.

A Game-Changer for Marginal or Stranded Projects

The mining industry is littered with low-grade deposits that never proceeded because cyanide restrictions or the economics of cyanide heap leaching were simply too weak. RZOLV may bring many of these deposits into the realm of feasibility:

• Easier permitting accelerates time to production

• Higher recovery increases revenue

• Shorter leach cycles accelerate cash flow

• Lower environmental risk improves social license

• Non-cyanide chemistry opens doors in jurisdictions where cyanide is restricted or banned

For governments and communities, it means more projects can move forward without the safety concerns associated with cyanide.

A Cleaner Leach Solution in an ESG-Driven World

Cyanide has always been the elephant in the room for heap leaching. Even when managed responsibly, it remains a difficult sell to regulators and the public. RZOLV eliminates key issues:

• No cyanide destruction circuit

• No hydrogen cyanide gas risk

• No wildlife exposure

• No international cyanide code compliance burden

• No tailings detox challenges

In an era where ESG performance drives investment, the ability to leach gold without cyanide is no longer just a technical advantage—it’s a competitive imperative.

The Future of Low-Grade Gold Mining

Gold producers know the truth: easy, high-grade deposits are gone. The future belongs to low-grade ore, marginal deposits, and complex geology. The industry needs technologies that can squeeze more value out of less material, without increasing environmental risk.

RZOLV may deliver this without building new processing plants or changing the fundamental heap/vat layout.

In an industry starved for innovation that actually moves the needle, RZOLV presents something rare: a simple substitution that can transform the economics of projects around the world.

The next generation of heap leach mines may still look familiar from the outside—tall pads, plastic liners, drip emitters, and drainage ponds. But inside those pipelines, the chemistry is changing.

And with it, the future of low-grade gold mining.

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Disclosure and Cautionary Statement

This article has been published by RZOLV Technologies Inc. as part of its corporate communications and investor relations activities and reflects the views and opinions of management as of the date of publication. It is provided for general informational purposes only and does not constitute investment advice, an offer to sell, or a solicitation to buy securities. Certain statements in this article may constitute forward-looking information within the meaning of applicable Canadian securities laws and are subject to risks, uncertainties, and assumptions that could cause actual results to differ materially. Readers should not place undue reliance on such statements. The Company’s officers, directors, and insiders may hold securities of RZOLV and therefore have a financial interest in the Company’s performance. Readers are encouraged to review RZOLV’s public disclosure documents available on SEDAR+ for a discussion of material risks and assumptions. Neither the TSX Venture Exchange nor its Regulation Services Provider has reviewed or approved the contents of this article.