Gold Carbon Recovery — Activated Carbon for CIP/CIL Mines
Engineered for maximum gold loading, high attrition resistance, and low gold losses. Sourced directly from our state-of-the-art facility in Tuticorin, India.
High-Performance Gold Carbon Recovery
In modern precious metal extraction, **gold carbon recovery** stands as the industry standard for mining profitability. Raj Carbon manufactures high-hardness coconut shell activated carbon engineered specifically to capture gold-cyanide complexes from agitated slurry.
As a leading direct manufacturer, we supply mine sites worldwide with premium activated carbon that minimizes flotation losses and ensures optimal elution performance. Strategically operating close to India's coastal coconut-growing hubs, we control our raw material chain to deliver unmatched consistency in every batch of gold recovery carbon.
Our specialized grades are engineered to withstand the rigorous mechanical demands of Carbon-In-Pulp (CIP) and Carbon-In-Leach (CIL) circuits, ensuring your mine achieves the highest gold loading rate and the lowest attrition loss possible.
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What Is Activated Carbon Gold Recovery (CIP/CIL)?
The Carbon-In-Pulp (CIP) and Carbon-In-Leach (CIL) processes are the dominant gold extraction methods in mines globally, particularly in major mining jurisdictions like South Africa, Australia, Ghana, and the Americas. The process begins after the gold-bearing ore has been crushed, ground, and treated in a cyanide leach circuit. Gold is dissolved into a liquid phase as a gold-cyanide complex.
In a Carbon-In-Pulp (CIP) circuit, the leaching of ore is completed prior to the addition of activated carbon. Slurry flows through a series of adsorption tanks containing granular activated carbon, moving counter-current to the slurry. The carbon selectively adsorbs (and technically takes up via adsorption, though some buyers search for "absorption" parenthetically) the gold complexes onto its vast internal pore network.
In a Carbon-In-Leach (CIL) circuit, leaching and adsorption occur simultaneously within the same tanks. CIL is particularly preferred for ores containing organic matter ("preg-robbing" ores) because the activated carbon immediately adsorbs the gold as soon as it dissolves, preventing other minerals or carbonaceous matter in the ore from reclaiming the gold. In both systems, the gold-loaded carbon is screened from the slurry, stripped of its gold via elution, and regenerated in high-temperature rotary kilns for reuse.
Why Mines Choose Raj Carbon Gold Recovery Carbon
Every fraction of a percent of carbon loss translates to lost gold and reduced profitability. Raj Carbon's gold recovery carbon grades are engineered to address the specific pain points of mining operators.
Withstands high shear forces in agitated mine tanks, reducing mechanical breakdown (attrition) and preventing gold loss.
Up to 1,250 mg/g iodine value provides an extensive microporous structure for high gold loading capacity and rapid adsorption kinetics.
Extremely low attrition rates mean minimal carbon fines generation, keeping gold bound to recoverable carbon fractions.
Highly accessible pores facilitate quick adsorption kinetics, lowering gold concentrations in final tailing slurries.
Our facility is located just 7 km from Tuticorin Port, enabling immediate dispatch, low freight cost, and fast global shipping.
The Impact of Hardness and Attrition Resistance
During agitation in CIP/CIL tanks, carbon particles collide with each other, ore particles, and tank walls. If the carbon does not possess high hardness, it easily disintegrates into micro-fines. These carbon fines pass through the exit screens and carry adsorbed gold directly into the tailings pond, resulting in irreplaceable financial losses. Raj Carbon uses a controlled steam-activation process that maximizes internal pore structure while maintaining the natural, dense crystalline structure of the coconut shell, guaranteeing a ball pan hardness of 97% or above.
Mercury Purification & Removal Grades
Many gold ores naturally contain trace amounts of mercury. During cyanidation, mercury is leached along with gold and is adsorbed by the activated carbon. When the carbon is sent to the elution and regeneration circuits, mercury can vaporize, posing severe health risks to workers and environmental threats to surrounding regions.
To address this critical issue, Raj Carbon supplies specialized mercury purification carbon grades. These include sulfur-impregnated activated carbons that chemically bind vaporized mercury, transforming it into stable cinnabar (mercury sulfide) within the carbon matrix. Our mercury removal grades are widely used in air scrubbers, retort exhausts, and wastewater treatment circuits around gold processing plants, ensuring clean operations that comply with global environmental standards.
• Base Material: Premium Coconut Shell GAC
• Sulfur Impregnation: 10% - 15% by weight
• Target Contaminants: Vapor-phase mercury, dissolved ionic mercury
• Typical Mesh: 4×8, 8×16
Technical Specifications — Gold Recovery Grades
Below are the standard technical specifications for Raj Carbon's gold recovery grades. All testing is conducted in our in-house, ASTM-compliant laboratory, and every batch is shipped with a full Certificate of Analysis (CoA).
| Parameters | RC-Gold 1050 | RC-Gold 1150 | RC-Gold 1250 | Test Method |
|---|---|---|---|---|
| Iodine Value (mg/g) | 1,050 min | 1,150 min | 1,250 min | ASTM D4607 |
| Ball Pan Hardness (%) | 97.5% min | 98% min | 98.5% min | ASTM D3802 |
| CTC Activity (%) | 50% min | 55% min | 60% min | ASTM D3467 |
| Ash Content (%) | 3% max | 3% max | 2.5% max | ASTM D2866 |
| Moisture Content (%) | 5% max | 5% max | 5% max | ASTM D2867 |
| Standard Mesh Sizes | 6×12 (1.70mm–3.35mm), 8×16 (1.18mm–2.36mm) | ASTM D2862 | ||
Global Export & Delivery Capabilities
Raj Carbon is recognized as a leading exporter and one of India's highest volume exporters of coconut shell activated carbon. Our operations are backed by a robust annual manufacturing capacity of 50,000 metric tons and a modern 10-acre production plant.
With over 153+ active clients in 40+ countries, we manage an average of 2,103 annual shipments. Our strategic location in Tuticorin, Tamil Nadu—only 7 km from the Tuticorin Port—gives us a unique logistical advantage, allowing us to load containers directly and ship immediately, maintaining a secure supply chain with minimal transit delays for mine sites in Western Australia, West Africa, and Latin America.
Gold Circuit Optimization & Adsorption Kinetics
To maximize gold extraction efficiency in Carbon-in-Pulp (CIP), Carbon-in-Leach (CIL), and Carbon-in-Column (CIC) circuits, mining operations rely on precise carbon adsorption kinetics. Raj Carbon's gold recovery grades are mathematically optimized to deliver superior loading kinetics and mechanical stability.
Gold Loading Capacity (K-Value)
The K-Value (tested per ASTM standards) measures the equilibrium gold loading capacity of the activated carbon. Our premium steam-activation parameters ensure an exceptionally high density of transport pores and adsorption sites, guaranteeing a K-value of >28 kg/t. This high capacity reduces the total inventory of carbon required in the circuit, lowering elution frequency and operational costs.
Adsorption Rate Kinetics (R-Value)
The R-value defines the kinetic rate of gold adsorption, representing how fast gold complexes are transferred from the liquid pulp onto the carbon. Raj Carbon features an optimized R-value of >60% in the first 4 hours of contact. Rapid kinetics ensure that soluble gold is quickly captured, minimizing soluble gold losses in tailings screens even during high-throughput slurry surges.
Platelet & Particle Geometry Control
Flat, elongated carbon particles (platelets) are highly undesirable as they pass horizontally through interstage screens or plug screen apertures, causing screen blinding and soluble gold loss. Raj Carbon utilizes specialized post-activation screening and de-dusting systems to keep platelet content under 1.0% by weight, ensuring trouble-free screening and low tailing losses.
Optimizing Elution and Thermal Regeneration
Beyond adsorption, our coconut shell activated carbon is engineered for optimal desorption (elution) characteristics. The clean, unblocked micropore system ensures that gold-cyanide complexes are fully eluted during standard Zadra or Anglo American Research Laboratory (AARL) stripping cycles. Additionally, our carbon exhibits high structural integrity under thermal reactivation (up to 750°C), restoring activity levels close to virgin carbon values without structural collapse or significant yield loss.
Gold Carbon Recovery FAQs
Gold mines require an ASTM ball pan hardness of 97% or higher. CIP and CIL tanks are continuously agitated, subjecting carbon to severe mechanical shear. Standard carbon would quickly break down into micro-fines. Raj Carbon's specialized gold grades achieve up to 98.5% hardness, preventing attrition and keeping gold locked in the system.
Thanks to our strategic facility location just 7 km from the Port of Tuticorin, we offer immediate dispatch. We maintain a steady inventory of standard gold grades (6×12 and 8×16 mesh), allowing us to ship container loads immediately after order confirmation to meet urgent mining requirements globally.
Yes. Many gold ores contain mercury which co-adsorbs onto the carbon. During high-temperature elution and reactivation, mercury vaporizes and poses safety risks. We manufacture sulfur-impregnated activated carbon grades designed specifically to capture vapor-phase mercury in mine exhaust circuits and process streams, safeguarding workers and keeping operations compliant.
The standard size distributions are 6×12 mesh (1.70mm to 3.35mm) and 8×16 mesh (1.18mm to 2.36mm). The larger size is selected to ensure easy screening of the carbon from the ore slurry without screen blinding. We manufacture both standard distributions with strict particle sizing control to ensure zero out-of-spec fractions.
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