Gold recovery is a game of efficiency. In Carbon-in-Leach (CIL) and Carbon-in-Pulp (CIP) circuits, the activated carbon acts as a sponge, soaking up dissolved gold from the cyanide slurry. But what happens when that sponge starts to crumble?
Many mining operators focus solely on the K-Value (Adsorption Rate) when selecting carbon. While kinetics are crucial, our field data from 50+ mines globally suggests that Attrition Resistance (Hardness) is the single biggest factor in profitability.
The Economics of Attrition Loss
In a CIL tank, carbon particles are constantly agitated. If the carbon is soft (typically coal-based or low-quality coconut), it breaks down into fine dust (“fines”). These fines, loaded with gold, are too small to be caught by the interstage screens. They pass through and are lost forever in the tailings.
“A mere 1% increase in carbon attrition can result in $500,000+ of annual gold loss for a mid-sized mine.”
This is why Premium Coconut Shell Carbon is the industry standard. Its natural micro-structure provides superior hardness compared to coal or wood-based alternatives.
Critical Parameters for Mining Carbon
When reviewing a Technical Data Sheet (TDS) for gold recovery, look for these three metrics:
- Hardness Number: Should be >98% (ASTM D3802).
- Platelet Structure: Ensures faster kinetics than standard granules.
- Activity (CTC/Iodine): Ensures capacity for gold loading.
Need a Sample for Hardness Testing?
We offer free 500g samples of our GoldMax™ 6×12 carbon for your lab verification.Request Free Sample
Coconut vs. Coal: The Verdict
While coal-based carbon is cheaper upfront, its softer structure leads to higher top-up rates and gold loss. Coconut shell carbon, specifically our GoldMax™ Series, is engineered to withstand the rigorous abrasion of modern CIL agitators.
Optimizing Your Circuit
Beyond selection, proper pre-attrition and regeneration (kiln) practices are essential. Our technical team can assist with on-site audits to optimize your carbon management strategy.
