AuLeach™ GDA Gold Leaching Agent HS: 3824999999 – Eco-Friendly Substitute for Sodium Cyanide

Product Introduction

Environment-friendly Gold Leaching Agent / Gold Recovery Reagent / Gold Separation Refining Chemical is a new green, environmentally friendly gold extraction agent. This metallic ore dressing agent is a gray-white powder, widely used for the recovery of gold and silver from a variety of gold- and silver-bearing materials. It can replace NaCN without changing the original process, offering green environmental protection, stable indicators, safe use, and low comprehensive cost.

AuLeach™ Series: The Revolutionary Eco-Friendly Gold Leaching Agent (GDA)

A Sustainable 1:1 Seamless Substitute for Sodium Cyanide — Redefining the Future of Green Mining.

As global environmental regulations tighten and the “Social License to Operate” becomes a critical asset for mining companies, United Chemical presents AuLeach™ (GDA). This high-tech, non-toxic reagent offers an industrial-strength solution for gold extraction, delivering the performance of traditional cyanide without the extreme toxicity or the regulatory burden.

Expert Insight: Breaking the “Cyanide Constraint”

In the modern mining landscape, the “hidden costs” of Sodium Cyanide — including specialized transport, escorts, complex permitting, and high tailings treatment expenses — can erode your project’s profitability.

AuLeach™ is engineered to break this constraint. Classified as a common chemical product (HS: 3824999999), it allows mines to bypass the “Red Tape” of cyanide management while achieving 92%–95% recovery rates. For complex ores (arsenic- or sulfur-bearing), AuLeach™ often demonstrates superior selectivity, reducing reagent consumption and stabilizing the leaching circuit.

Technical Data Sheet (AuLeach™ GDA Series)

Certified by United Chemical Quality Control Center | Conforms to International ESG Mining Standards.

Core Competitive Advantages

A. Seamless Process Integration

AuLeach™ is designed for “Drop-in Replacement.” You do not need to modify your existing CIP, CIL, Heap Leaching, or Pool Leaching infrastructure. Simply switch the reagent and maintain your standard pH (10.5–11.5) and alkalinity controls.

B. Accelerated Adsorption Kinetics

Field data from our operations in 77 countries shows that AuLeach™ can shorten the adsorption equilibrium time by 2–4 hours compared to traditional cyanide. This increases your plant’s throughput and optimizes the efficiency of our AuCarb™ Activated Carbon.

C. Drastic Reduction in Logistics Costs

Because AuLeach™ is not classified as a “highly toxic” substance (Class 6.1), it does not require:

• Armed escorts during inland transport.
• Specialized hazardous goods storage facilities.
• Complex environmental discharge permits for tailings.
• Result: A 30%–50% reduction in total logistics and compliance overhead.

Packaging & International Logistics

We provide robust, tamper-proof packaging designed for the most demanding maritime and inland transit conditions.

Unit Packaging:

• Net Weight: 25 KG per bag.
• Material: PE Paper-Plastic Composite with an internal protective film bag (Moisture-proof & Heavy-duty).

Loading Capacity:

Safety and Hazards (MSDS Highlights)

Unlike Sodium Cyanide, AuLeach™ is environmentally friendly and non-flammable. It significantly reduces the risk of accidental poisoning on-site.

• Non-flammable & Non-explosive.
• Tailings Treatment: The residual liquid can be treated easily, meeting international “Green Mining” discharge standards with minimal chemical intervention.

Why Partner with United Chemical?

• Over 30+ years of experience in the “Gold City” of China.
• Global Presence: Active technical support teams in Africa, Southeast Asia, and Central Asia.
• The Triple Threat: We deliver a technical synergy where AuLeach™ (Leaching), AuCyan™ (Booster), and AuCarb™ (Adsorption) work together to secure an extra 2%–5% recovery gain.

Product Applications

This metallic ore dressing agent is suitable for the following ore types: gold and silver oxide ore, primary ore, high-sulfur and high-arsenic gold ore, cyanide tailings, gold concentrate, sulfuric acid slag, anode mud, etc.

Advantages of the Safe Gold Extracting Agent

1. Low toxicity and environmental protection: non-flammable, non-explosive, non-oxidative, non-radioactive, and low-toxic — a common chemical product that is environmentally friendly.
2. Stable performance: reduces interference from harmful substances such as arsenic and sulfur.
3. Strong applicability: suitable for heap leaching, basin leaching, and CIP processes for oxidized gold and silver ore. Scalable for small to large operations, and especially suited to large-scale heap leaching.
4. High leaching rate: effectively leaches gold ions, achieving a faster and higher recovery rate than Sodium Cyanide.
5. Selective adsorption: activated carbon selectively adsorbs gold from the gold–copper leaching solution, aiding the separation of copper and gold.
6. Easy to use: the manufacturing process aligns with Sodium Cyanide conditions, making it easy to adopt and promote.
7. Easy to transport: a common cargo that can be shipped by air, sea, road, or rail.

Usage Method

During use, the cyanide-free gold recovery reagent should be agitated with alkaline water at normal temperature and then dissolved into the gold leaching slurry. For heap leaching, basin leaching, and oxidized gold ore production, the process is the same as that for Sodium Cyanide. The pregnant solution and the lean solution can be reused, and the best adsorption material for the pregnant gold leach solution is activated carbon. The leaching effect is best when the ambient temperature is above 10 °C. The reagent may be compatible with gold cyanide extract.

Alkalinity: Lime, caustic soda, etc. are commonly used to adjust and maintain the pH value at 10–12. After the raw ore is broken up or fed into the pool, return water to adjust the alkalinity to a pH value of 11 ± 1.

Application / Dosage: Approximately 0.5–1.0 parts per thousand (500–1000 g of product per ton of ore). The ore’s properties, grade, and pH affect the dosage. The actual dosage can be calculated according to the concentration of the solution.