Heap Leaching Applications

Transforming Large-Scale Gold Recovery with Clean Chemistry
Heap leaching is the backbone of global gold production, enabling cost-effective metal recovery from low-grade and bulk-tonnage ores. Its simplicity—stacking crushed ore on lined pads and irrigating with leach solution—has made it the preferred method for remote and large-scale operations. However, the reliance on sodium cyanide introduces serious environmental and social challenges. Hydrogen cyanide gas emissions, complex detoxification systems, and mounting regulatory restrictions are increasingly threatening the long-term viability of cyanide-based heap leaching.

RZOLV™ Designed for Real-World Leach Pad Conditions
RZOLV™ is specifically formulated to operate under open-air, ambient-temperature conditions typical of heap leach environments. Working at mildly acidic pH and moderate oxidation-reduction potentials, RZOLV™ forms stable, soluble gold complexes without producing toxic gases or harmful by-products. The reagent’s strong oxidative capacity and buffering system maintain consistent solution strength even during long percolation cycles—ensuring uniform contact, high recovery, and minimal passivation across large heaps. Importantly, RZOLV™ functions effectively with existing infrastructure, allowing mines to transition from cyanide to clean chemistry with minimal capital investment.

Performance, Cost, and Environmental Advantages
Field testing has shown that RZOLV™ achieves recoveries comparable to or exceeding cyanide across oxide, sulfide, and complex ore types, while maintaining solution stability over prolonged leach cycles. The reagent’s compatibility with standard carbon and adsorption circuits enables direct integration into current operations. Electrochemical regeneration further enhances economics by reducing reagent consumption and make-up costs.
Beyond performance, RZOLV™ eliminates the acute toxicity, spill risk, and permitting barriers associated with cyanide. Its environmentally benign composition allows projects to advance in jurisdictions where cyanide is restricted or banned—strengthening ESG compliance, reducing closure liabilities, and enhancing community acceptance.