Advanced Gold Extraction Chemicals for Colombian Metallurgy
Optimizing Refractory Ores Across the Antioquia and Segovia Belts
United Chemical supplies guaranteed purity AuCyan™ Sodium Cyanide NaCN (≥98.3%), AuCarb™ Gold Recovery Coconut Shell Activated Carbon (≥99% Hardness), and non-hazardous AuLeach™ Gold Leaching Agent (GDA) to empower Heap leaching, Vat leaching, CIP, CIL, and CIC operations across the Colombian mining sector.
The Colombian Mining Landscape: A Convergence of Geological and Environmental Challenges
Colombia is witnessing a transformative era in commercial gold extraction. From the world-class underground operations in Antioquia (such as the Buriticá and Segovia-Remedios belts) to the rich deposits in Caldas (Marmato) and Chocó, the nation offers immense metallurgical potential. However, Colombian mineralogy often presents complex, refractory sulfide ores containing pyrites and tellurides. Furthermore, the extreme tropical rainfall and humidity of the Andean geography place immense stress on the storage and stability of mining chemicals.
As a leading manufacturer proudly exporting to 77+ countries worldwide, United Chemical delivers custom-engineered chemical infrastructures that combat these specific constraints. We recognize the rigorous environmental mandates enforced by Colombia's National Authority of Environmental Licenses (ANLA), providing both high-strength conventional reagents and revolutionary non-hazardous alternatives to ensure your operations remain highly productive and 100% compliant across Carbon-in-Pulp (CIP), Carbon-in-Leach (CIL), Carbon-in-Column (CIC), Heap leaching, and Vat leaching.
To ensure absolute logistics security and uninterrupted supply chains, we operate exclusively via maritime ocean freight. We execute transactions under FOB (China ports) or CIF terms directly to Colombia’s vital maritime gateways, including the Port of Buenaventura (Pacific), Port of Cartagena, and Port of Barranquilla (Caribbean). We do not utilize international railway transport. Supported by a strict Minimum Order Quantity (MOQ) of 1x20' FCL, we guarantee factory-direct pricing for commercial-scale operators.
1. Overcoming Colombian Operational Bottlenecks
Extreme Tropical Humidity & Storage
Regions like Chocó and the Andean slopes experience some of the highest rainfall globally. Standard chemical packaging fails under high humidity, causing Sodium Cyanide to rapidly hydrolyze and degrade before it even reaches the leaching vats.
Refractory Sulfides (Cyanicides)
The Segovia-Remedios belt produces ores rich in sulfides (pyrite, sphalerite). These act as severe oxygen and cyanide scavengers, rapidly depleting weak reagents and drastically reducing overall gold dissolution rates in CIL tanks.
Stringent ANLA Environmental Scrutiny
As the Colombian government fiercely cracks down on illegal mining and toxic discharge, large commercial plants face immense permitting pressure. Transporting and detoxifying traditional Class 6.1 cyanide requires heavy security escorts and exorbitant compliance OPEX.
2. The Golden Triangle: United Chemical's Solutions for Colombia
AuCyan™ Sodium Cyanide NaCN (≥98.3%)
Purity Standard: ≥98.3%To overpower the refractory sulfides found in the Antioquia gold belts, AuCyan™ Sodium Cyanide NaCN delivers unparalleled chemical aggression. We strictly guarantee a minimum purity of ≥98.3% (with factory analyses routinely at 98.5%). This massive concentration of free CN⁻ ions rapidly cuts through complex base metals, ensuring your gold dissolution kinetics remain fast and efficient.
Anti-Hydrolysis Packaging: Sealed in UN-certified 50kg steel drums or heavy-duty 1,000kg wooden boxes. Every container features a thick internal Polyethylene (PE) liner, absolutely preventing moisture ingress during transit through Buenaventura and storage in high-rainfall regions.
Stable pH Buffering: Low unreacted sodium hydroxide (NaOH) content minimizes scaling in pipes and heat exchangers.
📊Technical Specification: The 98.3% Purity Standard
Surpassing industry benchmarks, our latest production batches consistently achieve "Superior Quality" grades. Below is the certified performance data .
| Testing Items | Standard (GB/T 19306-2003) | AuCyan™ (Typical) | Operational Impact |
|---|---|---|---|
| Sodium Cyanide (NaCN) | ≥ 98.0% | 98.3% | Maximum gold dissolution kinetics and recovery rates. |
| Sodium Hydroxide (NaOH) | ≤ 0.5% | 0.13% | Superior pH stability; prevents premature hydrolysis. |
| Sodium Carbonate (Na2CO3) | ≤ 0.5% | 0.18% | Minimized impurity interference in the leaching solution. |
| Moisture (H2O) | ≤ 0.9% | 0.3% | Enhanced solid stability during long-term storage and sea transit. |
| Insoluble Substances | ≤ 0.05% | 0.02% | Anti-clogging formula; protects critical pumps and nozzles. |
AuCarb™ Gold Recovery Coconut Shell Activated Carbon
Ball-Pan Hardness: ≥99%In high-density CIP and CIL agitation tanks, soft activated Carbon is crushed into fine dust, carrying your adsorbed gold straight into the tailings dam. AuCarb™ Activated Carbon is manufactured from hand-selected, high-density Coconut Shells via rigorous steam activation. We guarantee an elite ball-pan hardness of ≥99%, virtually eliminating mechanical attrition loss.
Rapid Adsorption Kinetics: Extremely high Iodine and CTC activity ensure that gold-cyanide complexes are stripped from the solution quickly, increasing total plant throughput.
Low Platelet Content: Engineered at ≤5% platelets to resist organic poisoning and ensure highly efficient elution and thermal regeneration cycles.
📊 AuCarb™ Series: Core Parameters Intuitive Comparison Table
To facilitate a more intuitive selection process tailored to your specific metallurgy circuit, we have summarized the core technical parameters of our four flagship AuCarb™ variants.
| Core Testing Parameter | AuCarb™ BC1100 | AuCarb™ AC50 | AuCarb™ AC55 | AuCarb™ AC60 |
|---|---|---|---|---|
| Market Benchmarking Positioning | Conventional Heap Leach / High Cost-Performance | Comparable product: Jacobi G208S | Comparable product: Jacobi G209S | Advanced choice for Large Scale / Comparable: Jacobi G210S |
| Apparent Density | 0.40 - 0.50 g/ml | 0.48 - 0.55 g/ml | 0.45 - 0.55 g/ml | 0.45 - 0.55 g/ml |
| Ball-pan Hardness | ≥ 98.5% | ≥ 99% | ≥ 99% | ≥ 99% |
| Platelet Content | ≤ 5% | ≤ 5% | ≤ 5% | ≤ 5% |
| Attrition | ≤ 2% | ≤ 1.5% | ≤ 2% | ≤ 2% |
| Total Ash Content | ≤ 5% | ≤ 3% | ≤ 3% | ≤ 3% |
| Moisture | ≤ 10% | ≤ 5% | ≤ 5% | ≤ 5% |
| Adsorption Capacity (K Value) | / | ≥ 26 Kg/t | ≥ 28 Kg/t | ≥ 30 Kg/t |
| Adsorption Rate (R Value) | / | ≥ 50% | ≥ 55% | ≥ 60% |
| Iodine Number | ≥ 1100 mg/g | / | / | / |
| Butane Activity | / | ≥ 19.5% | ≥ 21% | ≥ 23% |
| CTC (Carbon Tetrachloride Activity) | / | ≥ 50% | ≥ 55% | / |
* Execution Standards: Complies with American ASTM standards and A.A.R.L. internal mining testing standards. The product has passed third-party inspection and test samples can be provided upon request.
AuLeach™ Gold Leaching Agent (GDA) - Non-Hazardous
Non-Hazardous ReagentTo navigate the intense regulatory scrutiny of ANLA and secure community approval across environmentally sensitive Colombian municipalities, AuLeach™ Gold Leaching Agent (GDA) is the definitive solution. Globally certified as a Non-Hazardous chemical, AuLeach™ entirely replaces sodium cyanide, slashing the massive overhead of military transit escorts and complex chemical import permits.
Zero Equipment CAPEX: It is a 100% drop-in replacement. Simply utilize your existing Heap leaching pads, Vat leaching tanks, and CIL infrastructure without modifying pumps or adding new equipment.
Frictionless Andean Logistics: Shipped as general cargo, bypassing dangerous goods restrictions at Cartagena and Buenaventura ports, accelerating delivery times to the mine site.
Drastic OPEX Reduction: Significantly reduces the cost of tailings detoxification (such as INCO SO₂/Air) before discharging into sensitive mountain watersheds.
Validate Performance on Your Colombian Ore Samples
Are high-sulfide ores slowing your recovery? Are strict ANLA regulations delaying your project? We invite Colombian Metallurgists, Plant Directors, and Supply Chain Managers to evaluate our chemical superiority independently.
📌 Complimentary Laboratory Sample Availability:
United Chemical gladly 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.
Frequently Asked Questions: Colombian Metallurgy & Logistics
1. How does AuCyan™ maintain stability in Colombia's extremely humid, high-rainfall regions?
Sodium cyanide is highly hygroscopic; exposure to tropical humidity in regions like Chocó or Antioquia can cause it to absorb moisture, hydrolyze, and lose active CN⁻ strength before use. To combat this, AuCyan™ (≥98.3%) is manufactured with a remarkably low moisture content (≤0.3%) and is packaged in highly secure, UN-certified 50kg steel drums or 1,000kg reinforced wooden boxes. Crucially, every package contains a thick, heat-sealed inner polyethylene (PE) liner, ensuring the briquettes remain 100% dry and stable during prolonged storage at the mine site.
2. Which Colombian maritime ports do you utilize for CIF deliveries?
To ensure optimal inland routing for our mining partners, we offer comprehensive maritime shipping to both the Pacific and Caribbean coasts. Under CIF terms, we regularly dispatch ocean containers to the Port of Buenaventura (ideal for western and central Andean operations) and the Port of Cartagena / Barranquilla (for northern operations). Once the cargo is cleared at the destination port, the client's appointed local logistics provider manages the inland trucking to the specific mine site.
3. Does the ANLA (National Authority of Environmental Licenses) permit the use of AuLeach™?
Yes. Because AuLeach™ Gold Leaching Agent (GDA) is globally certified as a Non-Hazardous chemical substance (unlike DG Class 6.1 Sodium Cyanide), it aligns perfectly with the stringent environmental conservation mandates enforced by the ANLA and regional autonomous corporations (CARs). Utilizing AuLeach™ vastly simplifies the environmental licensing process for new concessions, eliminates the requirement for heavily armed inland transport escorts, and significantly lowers the toxicity of your tailings discharge.
4. Why is a ≥99% hardness rating critical for Activated Carbon in Colombian CIL plants?
In modern Carbon-in-Leach (CIL) plants, the ore slurry is subjected to continuous, high-shear mechanical agitation. If the activated carbon is soft or poorly activated, the impeller blades will grind the carbon granules into microscopic dust. This fine carbon—now loaded with your extracted gold—will pass through the retaining screens and be permanently lost in the tailings pond. AuCarb™ provides a guaranteed ball-pan hardness of ≥99%, ensuring immense structural integrity and maximizing your ultimate gold yield.
5. Are there any capital expenditure (CAPEX) costs to switch from Cyanide to AuLeach™?
Absolutely zero. AuLeach™ is engineered as a 100% direct drop-in replacement for Sodium cyanide. Colombian plant managers do not need to purchase new leaching tanks, alter their Heap leach drip irrigation systems, or modify their carbon elution and electrowinning circuits. You simply substitute the cyanide with AuLeach™ in your dosing regime, utilizing standard hydrated lime to maintain the optimal pH level (usually between 10.5 and 11.5).
6. How does AuCyan™ perform against the refractory sulfide ores found in Segovia?
Ores from regions like the Segovia-Remedios belt often contain refractory sulfides (such as pyrite and sphalerite) which consume large amounts of oxygen and reagent. AuCyan™ Sodium Cyanide delivers an ultra-high purity of ≥98.3%, ensuring an overwhelming concentration of free CN⁻ ions. This aggressive formulation rapidly penetrates the ore matrix, preventing the base metals from entirely depleting the cyanide before the gold can be fully dissolved, thus securing high recovery rates.
7. Do you provide railway transport for inland deliveries in South America?
No. Due to severe international safety regulations governing the movement of hazardous chemicals and the logistical complexities of the Andean geography, we strictly prohibit the use of international railway transport for our exports. We secure our supply chain exclusively via maritime ocean container shipping.
8. What is the Minimum Order Quantity (MOQ) for exporting mining chemicals to Colombia?
To guarantee factory-direct pricing, protect the integrity of the chemical packaging, and optimize maritime freight costs across the Pacific, our strict MOQ is 1x20' FCL (Full Container Load). This policy applies universally to AuCyan™, AuCarb™, and AuLeach™. Depending on the product and packaging type, a single 20-foot container typically accommodates between 10 to 20 metric tons of material.
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