If you're running a CIL or CIP gold circuit, chances are you've either used Haycarb RCGC or been quoted on it. It's one of the most recognized coconut shell activated carbon brands in gold mining — especially in African and Australian operations where it's been the default specification for decades.
But "default" doesn't mean "only option." This article breaks down what RCGC actually delivers, where it fits, what it costs, and what factory-direct alternatives look like when you compare the numbers side by side.
Haycarb PLC is a Sri Lankan activated carbon manufacturer, founded in 1973 and listed as a subsidiary of Hayleys PLC on the Colombo Stock Exchange. They're vertically integrated — meaning they control the supply chain from coconut shell charcoal production (sourced from 19 districts across Sri Lanka) to activation and packaging.
Key facts:
Haycarb's strength is consistency. When you order RCGC, you're getting a product backed by 50+ years of process control in coconut shell activation. Their quality management system is mature, and their brand carries weight with mining engineers who've used it across multiple projects.
That said, you're also paying for that brand. And as China-based manufacturers have closed the quality gap in the last decade, the value equation has shifted.
RCGC is Haycarb's gold recovery grade — designed specifically for carbon-in-leach (CIL), carbon-in-pulp (CIP), and carbon-in-column (CIC) applications. Here's what a typical RCGC Technical Data Sheet looks like:
| Parameter | RCGC Typical Spec | Test Method |
|---|---|---|
| Raw material | Coconut shell | — |
| Activation | Steam activated | — |
| Mesh size | 6×12 (1.70–3.35 mm) | ASTM D2862 |
| Iodine number | ≥1050 mg/g | ASTM D4607 |
| Hardness (ball-pan) | ≥97% | ASTM D3802 |
| Moisture | ≤5% | ASTM D2867 |
| Ash content | ≤3% | ASTM D2866 |
| Bulk density | 0.48–0.54 g/cm³ | ASTM D2854 |
| Surface area (BET) | ≥1000 m²/g | BET method |
| Gold adsorption rate (K value) | Published on request | Mintek method |
These are solid specifications. The 97% hardness floor is what makes RCGC survive the abrasion of CIL circuits — where carbon is constantly pumped, screened, and recycled through aggressive pulp environments. The iodine number at 1050+ ensures adequate gold loading capacity.
To be fair to Haycarb — there are legitimate reasons RCGC became an industry standard:
1. Track record in African gold mines. Haycarb has supplied major operations in Ghana, Tanzania, Mali, Burkina Faso, and South Africa for decades. When a mine's metallurgical team has 10+ years of plant data on RCGC, switching carries perceived risk.
2. ESG documentation. Haycarb's green charcoal program and Colombo Stock Exchange listing mean they can provide ESG compliance documentation that some publicly-traded mining companies require from suppliers.
3. Consistent quality batch-to-batch. Their vertically integrated model — controlling charcoal production through to activation — reduces variability. You generally get what the TDS says.
4. Global distribution. Warehouses in multiple countries mean shorter lead times for urgent orders, even if the per-ton cost is higher.
1. Premium pricing. RCGC typically lands 30–50% above factory-direct alternatives from Chinese manufacturers producing equivalent specs. For a mine consuming 200+ tons/year, that's a significant cost difference.
2. Lead times during peak demand. Despite their capacity, Haycarb's order book fills up — especially when gold prices spike and every mine is restocking. Lead times of 6–8 weeks are not uncommon during peak periods. Factory-direct suppliers in China often ship within 2–3 weeks.
3. Limited customization. RCGC is a standard product. If your circuit needs a slightly different mesh distribution, higher iodine value, or acid-washed variant, Haycarb can accommodate but at premium pricing and longer lead times. Smaller manufacturers are generally more flexible.
4. Minimum order quantity. Haycarb's MOQ is typically 20+ tons. For small-scale operations or trial orders, this can be a barrier. Factory-direct Chinese manufacturers commonly accept 10-ton trial orders.
Here's where the comparison gets concrete. We'll use published specifications from Haycarb and two factory-direct manufacturers.
| Parameter | Haycarb RCGC | HMGOLD™ 7500 (Huamei) |
| Raw material | Coconut shell (Sri Lanka) | Coconut shell (Philippines) |
| Mesh size | 6×12 | 6×12 |
| Iodine number | ≥1050 mg/g | ≥1100 mg/g |
| Hardness | ≥99% | ≥99% |
| Ash content | ≤3% | ≤3% |
| Moisture | ≤5% | ≤5% |
| Bulk density | 0.48–0.54 g/cm³ | 0.48–0.52 g/cm³ |
| Surface area | ≥1000 m²/g | ≥1050 m²/g |
| CTC | Not typically published | ≥60% |
| MOQ | 20 tons | 10 tons |
| Lead time | 2–3 weeks | 2–3 weeks |
| Pricing model | Distributor/agent network | Factory-direct |
The numbers tell the story: on paper, the factory-direct alternatives match or exceed RCGC on key parameters (iodine, hardness, ash). The HMGOLD™ 7500, for example, specs at ≥1100 iodine and ≥99% hardness — both above RCGC's guaranteed minimums.
But paper specs aren't the whole picture.
Experienced metallurgists know that two carbons with identical TDS numbers can perform differently in the same circuit. Here's what to evaluate beyond the data sheet:
Gold loading capacity (K value and R value)
The K value measures how fast carbon adsorbs gold from solution. The R value measures how much gold the carbon can hold. These are the metrics that actually predict CIL/CIP performance — not iodine number.
Haycarb publishes K and R values on request. If you're comparing alternatives, demand these numbers from every supplier. Any manufacturer serious about gold recovery carbon will have Mintek or equivalent test data available.
Attrition resistance under real conditions
Ball-pan hardness (ASTM D3802) is a standardized test, but it doesn't perfectly replicate the specific abrasion conditions in your circuit. Carbon that tests at 99% hardness in a lab may lose 2% vs 1.5% per cycle in a high-screen-velocity CIL plant. The only way to verify: run a trial.
Elution behavior
How cleanly does the gold strip during elution? Some carbons hold gold more tightly than others, requiring higher temperatures or longer strip times. This affects your overall gold recovery and operating costs. Request elution test data or, better, run your own strip test on a sample batch.
Fines generation
Even high-hardness carbon generates fines over time. The question is how much and how fast. Excessive fines mean gold losses (fines pass through screens), increased thickener load, and higher replacement costs. Track fines percentage per cycle during your trial.
Let's model the actual cost impact. Assume a mid-size CIL operation consuming 150 tons of carbon per year:
| Cost factor | Haycarb RCGC | Factory-direct (China) |
|---|---|---|
| FOB price (estimated range) | $3,500–5,200/ton | $3,200–3,800/ton |
| Shipping (to West Africa) | Similar (both export via container) | Similar |
| Annual carbon cost (150 tons) | $525,000–780,000 | $480,000–570,000 |
| Potential annual savings | — | $45,000–210,000 |
| Sample/trial cost | Usually available, MOQ 20T | 1–2 kg free sample, MOQ 10T |
A $100,000–150,000 annual saving is worth investigating — even if it requires a 3-month parallel trial to validate performance.
Important caveat: These are estimated ranges based on market conditions. Actual pricing depends on volume, payment terms, and current supply/demand. Request quotes from both sides to get real numbers.
If you're currently on RCGC and considering a switch, here's a low-risk evaluation process:
Contact the alternative supplier and ask for:
Any manufacturer that can't provide these documents isn't ready for gold mining supply.
Run your own lab tests. Compare iodine number (ASTM D4607), ball-pan hardness (ASTM D3802), and ash content (ASTM D2866) against your current RCGC batch results. Not against Haycarb's published minimums — against what you're actually receiving.
Load the alternative carbon into one circuit or one adsorption stage while running RCGC in the others. Track:
Run for a minimum of 8–12 weeks to capture performance over multiple adsorption/elution cycles.
Don't just compare purchase price. Factor in:
If the alternative matches RCGC on performance and saves $100+/ton, you have your answer.
Based on published case studies and export records, the shift from premium-brand carbon to factory-direct alternatives has been most pronounced in:
West African gold mines (Ghana, Burkina Faso, Mali): These markets were early Haycarb strongholds but have increasingly adopted Chinese-manufactured carbon as quality has proven equivalent in-plant. A 56-ton HMGOLD™ shipment to a Ghana CIP operation showed the mine upgraded from 6×16 to 6×12 mesh during the switch — improving both carbon retention and gold loading.
East African operations (Tanzania, Ethiopia): Chinese manufacturers have built strong export records here, particularly for CIL circuits.
South American mines: Peru, Brazil, and Colombia have seen increasing adoption of factory-direct coconut shell carbon, driven by cost pressure and improved logistics from Chinese ports.
Australian mines remain more brand-loyal, partly due to established supply agreements and proximity to Southeast Asian production.
RCGC is one of the most proven gold recovery carbons on the market, backed by decades of plant data. "Best" depends on what you're optimizing for — if brand reputation and ESG documentation are priorities, RCGC delivers. If you're optimizing for cost-per-gram-of-gold-recovered and are willing to trial alternatives, factory-direct options with equivalent specs may deliver equal performance at 30–50% lower cost. The only way to determine what's "best" for your specific circuit is a parallel plant trial.
Both are coconut shell, steam-activated, 6×12 mesh gold recovery carbons. The key differences: RCGC uses Sri Lankan coconut shells and is produced in Haycarb's own facilities; HMGOLD™ uses Indonesian/Philippine shells and is manufactured in China. On specifications, HMGOLD™ 7500 guarantees ≥1100 iodine and ≥99% hardness vs RCGC's ≥1050 iodine and ≥97% hardness. Pricing differs significantly — HMGOLD™ is factory-direct while RCGC goes through distributor networks. Performance in-plant should be validated through trial.
Haycarb doesn't publish pricing — it varies by volume, destination, and distributor. Market estimates for RCGC typically range $2,200–2,800/ton FOB, depending on order size and delivery terms. Factory-direct alternatives from Chinese manufacturers typically range $1,400–1,800/ton FOB for equivalent specifications. Request quotes from both sides for your specific volume and destination.
Yes — if the alternative meets or exceeds the critical performance parameters (K value, R value, hardness, and attrition rate) in your specific circuit. The key is testing, not assuming. Run a parallel plant trial with 10–20 tons over 8–12 weeks. If gold recovery rates match within your acceptable tolerance, the cheaper carbon delivers the same metallurgical outcome at lower cost.
Haycarb ships from Sri Lanka (primary), Thailand, and Indonesia. They have warehouse/distribution points in several countries for faster delivery. Lead times from Sri Lanka to West Africa are typically 4–8 weeks including production and shipping. Chinese manufacturers ship from Fujian or Ningxia ports with similar transit times but often shorter production lead times (2–3 weeks vs 4–6 weeks).
