Massive Silver Cyanicide Ratios

Mexico is the world's largest silver producer, and gold is almost always co-mined with it. Silver requires nearly double the stoichiometric amount of cyanide to dissolve. Low-purity reagents will be rapidly exhausted by the silver, causing gold recovery to crash.

Arid Desert Kinetics (Sonora)

Northern Mexico's deserts experience severe water scarcity, necessitating the use of highly saline or recycled process water. High salinity lowers dissolved oxygen, retards leaching kinetics, and causes severe scaling in Heap Leach drip irrigation lines.

Inland Security & Transit Risks

Transporting DG Class 6.1 (Highly Toxic) Sodium Cyanide across certain Mexican states poses extreme security risks. Armed escorts and rigorous federal permits drive up OPEX. A legally compliant, non-hazardous alternative is a massive strategic advantage.

AuCyan™ Sodium Cyanide NaCN (≥98.3%)

AuCarb™ Gold Recovery Coconut Shell Activated Carbon

AuLeach™ Gold Leaching Agent (GDA) - Non-Hazardous

📌 Complimentary Laboratory Sample Availability:
                   United Chemical proudly provides free laboratory test samples strictly for AuCarb™ Gold Recovery Coconut Shell Activated Carbon and the AuLeach™ Gold Leaching Agent (GDA) - Non-Hazardous. Run comprehensive bottle roll and column tests to verify our kinetic advantages before placing a bulk order.

                   * Commercial bulk shipments globally commence at a factory Minimum Order Quantity (MOQ) of 1x20' FCL via FOB or CIF maritime terms.

1. How does AuCyan™ handle the extreme silver-to-gold ratios in Mexico?

AuCyan™ handles high silver-to-gold ratios by providing an ultra-high purity concentration (≥98.3%) of active sodium cyanide. Silver requires nearly double the stoichiometric amount of cyanide to dissolve compared to gold. If reagent purity is low, silver aggressively consumes the active ions, leaving gold un-leached. Our guaranteed ≥98.3% purity ensures an overwhelming surplus of free CN⁻ ions to dissolve both metals simultaneously, maximizing total recovery.

2. Which Mexican maritime ports do you utilize for CIF deliveries?

We primarily utilize the Port of Manzanillo, Port of Lázaro Cárdenas, and Port of Veracruz for CIF maritime deliveries to Mexico. Ports on the Pacific coast (Manzanillo) are ideal for operations in the Sierra Madre, while Veracruz serves eastern states. Once cleared through customs, your appointed local logistics firm handles the inland trucking to the mine site.

3. How does AuLeach™ GDA solve inland security and transport risks in Mexico?

AuLeach™ solves security risks because it is officially classified globally as a Non-Hazardous chemical. Transporting DG Class 6.1 toxic cyanide across Mexican highways poses extreme security risks and requires expensive military or federal escorts. AuLeach™ can be trucked as general cargo, eliminating massive security overhead and transit dangers.

4. Does AuCyan™ perform well in highly saline or recycled water in the Sonora desert?

Yes, AuCyan™ performs exceptionally well in highly saline or recycled water. High ionic strength in desert water retards oxygen solubility. Because AuCyan™ has extremely low impurities (like NaOH ≤0.13%), it dissolves rapidly without causing severe calcium scaling in Heap Leach drip emitters, sustaining aggressive leaching in arid environments.

5. Why is a ≥99% hardness rating critical for Activated Carbon in high-silver CIL plants?

A ≥99% hardness rating prevents activated carbon from shattering under the immense weight of adsorbed gold and silver complexes. In CIL operations, mechanical agitation combined with heavy silver loads will grind soft carbon into fine dust. AuCarb™'s extreme structural integrity ensures zero attrition loss, preventing your precious metals from washing into the tailings.

6. Are there any capital expenditure (CAPEX) costs to switch to AuLeach™?

There are zero CAPEX costs required because AuLeach™ is engineered as a 100% drop-in replacement. Plant managers do not need to purchase new leaching tanks, alter their Heap leach irrigation systems, or modify their carbon elution circuits. You simply substitute the cyanide with AuLeach™ directly into the process.

7. What types of ores can be processed using the AuLeach™ Non-Hazardous reagent?

AuLeach™ has a very broad application spectrum for various ore types. According to its Technical Data Sheet, it is highly effective on primary ores, oxide ores, semi-oxide ores, sulfide ores, gold concentrates, and cyanide tailings across both Carbon-in-Pulp and pool leaching operations.

8. How do Mexican metallurgical labs test the concentration of AuLeach™?

Laboratories test AuLeach™ concentration via a standard chemical titration method. This involves using an analytical grade silver nitrate complexing agent and a rhodanine indicator. During titration, the solution changes from yellow to red, and the milliliters of complexing agent consumed precisely indicates the reagent's active concentration.

9. What is the optimal pH range for utilizing AuLeach™ in leaching circuits?

The guaranteed operational pH range for AuLeach™ is between 10.5 and 12. This aligns perfectly with traditional cyanidation circuits, meaning plant operators can continue using standard hydrated lime to manage slurry alkalinity without altering their current procedures.

10. Do you provide international railway transport directly into Mexico from overseas?

No, we strictly prohibit the use of international railway transport for our overseas chemical exports. Due to severe international safety regulations governing hazardous chemicals across the Pacific, we secure our supply chain exclusively via maritime ocean container shipping (FOB or CIF) to Mexican seaports.

11. What is the Minimum Order Quantity (MOQ) for exporting to Mexico?

Our strict Minimum Order Quantity (MOQ) is 1x20' FCL (Full Container Load). This policy applies universally to AuCyan™, AuCarb™, and AuLeach™ to guarantee factory-direct pricing, protect packaging integrity, and optimize maritime freight costs across the Pacific Ocean.