Jacobi vs SunCarb vs HMGOLD: Gold Carbon Compared (2026)

If you're comparing activated carbon brands for your gold CIP or CIL plant, you've probably narrowed it down to a few names: Jacobi, SunCarb, and a growing list of Chinese manufacturers.

This article breaks down the real differences between Jacobi GoldSorb, SunCarb-Gold, and HMGOLD™ from Huamei Carbon — not marketing claims, but verified specs, operational trade-offs, and total cost of ownership.

Quick Specs Comparison

Parameter	Jacobi GoldSorb 610C	SunCarb-Gold	HMGOLD™7000
Raw Material	Coconut shell	Coconut shell	Coconut shell
Iodine Number	1050+ mg/g (claimed)	950-1050 mg/g (claimed)	1208 mg/g (SGS verified)
Hardness/Strength	97%+ (claimed)	95-96% (claimed)	98.2% (SGS verified)
Ash Content	≤3%	≤5%	2.52% (SGS verified)
Moisture	≤5%	≤5%	5.0% (SGS verified)
Available Mesh	6x12, 8x16	6x12, 8x16	6x12, 8x16, 5x10
Reactivation Cycles	8-12	5-8	10-15
Origin	Sweden/Sri Lanka	India	China (Fujian)
Third-Party Certification	ISO	Varies	SGS Report No. MSRCZ2500346-01A
Lead Time to Africa	4-6 weeks	2-3 weeks	2-3 weeks
MOQ	20 tons	10 tons	10 tons

The Iodine Value Trap: Why Some "High-Spec" Carbon Fails in Practice

Here's something most carbon salespeople won't tell you: a higher iodine number does not guarantee better gold recovery.

Iodine value measures total micropore volume using a small molecule (iodine, 0.27nm). Gold cyanide complexes are much larger (~0.6nm). A carbon with excellent iodine numbers might have the wrong pore size distribution for gold — plenty of micropores, but not enough mesopores where gold actually loads.

What this means for your operation:

Carbon A: Iodine 1100 mg/g, but mostly <0.5nm pores → slower gold loading, lower K-value
Carbon B: Iodine 1050 mg/g, but optimized pore distribution → faster loading, higher recovery

This is why you see cases where a "lower spec" carbon outperforms a "higher spec" one in actual plant conditions. The only way to know for sure is to run a plant trial — which is why we provide free samples for testing before any order.

Jacobi GoldSorb: The Premium Standard

What they do well:

Jacobi Carbons (now part of Osaka Gas Chemicals) has been in the gold carbon business for decades. Their GoldSorb and PICAGOLD lines are considered the industry benchmark in many large-scale operations.

Consistent batch-to-batch quality
Well-documented technical data sheets
Global supply chain with regional warehouses
Strong technical support team

The trade-offs:

Price premium: Jacobi commands the highest prices in the market. For operations processing thousands of tons monthly, this adds up significantly.
Lead time: European/Sri Lankan origin means 4-6 weeks to most African mining sites.
Minimum commitment: Large MOQs and long-term contracts preferred.

Best suited for: Large publicly-listed mining companies with strict vendor compliance requirements and budgets that prioritize brand name over cost optimization.

SunCarb-Gold: The Budget Option

What they do well:

SunCarb (Suneeta Carbons) offers a lower entry price point, making it accessible for smaller operations or pilot projects.

Lower upfront cost per ton
Fast delivery from India to East/West Africa
Flexible order quantities

The trade-offs:

Hardness concerns: At 95-96% hardness, attrition losses are higher during CIP screening. More carbon breaks down into fines that pass through screens — taking adsorbed gold with them.
Reactivation limits: Users report significant performance degradation after 5-8 reactivation cycles. Higher replacement frequency offsets the lower purchase price.
Batch consistency: Some operations report variation between shipments.

Best suited for: Small-scale miners, trial operations, or projects with extreme budget constraints where upfront cost is the only factor.

HMGOLD™: Factory-Direct Performance

HMGOLD™ is Huamei Carbon's dedicated gold recovery product line, manufactured from premium coconut shell charcoal through steam activation. Available in four grades: HMGOLD™6000, 7000, 7500, and PLUS.

Verified performance (SGS Report No. MSRCZ2500346-01A):

Iodine adsorption: 1208 mg/g — exceeds both Jacobi and SunCarb published specs
Strength: 98.2% — near-identical to Jacobi's claimed 97%+, significantly above SunCarb's 95-96%
Ash: 2.52% — lower ash = less contamination during elution
pH: 10.0 — optimal alkaline range for gold cyanide adsorption

Why these numbers matter for your gold recovery:

High hardness (98.2%) = less gold loss. Every percent of carbon that breaks into fines during CIP screening carries adsorbed gold past your recovery screens. The difference between 95% and 98% hardness over a year of operation can mean kilograms of gold lost to tailings.
High iodine (1208 mg/g) with optimized pore structure = faster loading. HMGOLD is specifically engineered for gold cyanide complexes, not just high iodine scores.
Low ash (2.52%) = cleaner elution. Less inorganic residue means more efficient gold stripping and higher purity final product.
10-15 reactivation cycles before replacement — 2-3x more than budget alternatives.

Operational advantages:

Factory-direct pricing (no distributor markup)
700+ tons monthly production capacity — no supply shortages
2-3 week delivery to African ports
Free samples for plant trial before commitment
COA provided with every shipment

The Real Cost: Carbon Price vs. Gold Lost

The cheapest carbon per ton is rarely the cheapest carbon per ounce of gold recovered. Here's how to think about total cost:

Total Operating Cost = Carbon Purchase + Gold Loss to Fines + Replacement Frequency

Example: Processing 50,000 tons of ore per year

Cost Factor	Premium Brand	Budget Brand	HMGOLD™
Replacement frequency	Every 10-12 cycles	Every 5-8 cycles	Every 10-15 cycles
Annual carbon consumption	Lower	Higher (2x)	Lowest
Gold loss to fines (hardness-related)	Low	High	Low
Elution efficiency	High	Medium	High
Estimated total cost	High	Medium-High	Lowest

The math is simple: spending 20-30% more on better carbon that lasts twice as long and loses less gold is always cheaper than buying "cheap" carbon twice as often while losing gold to tailings.

What Operations Are Switching To

In the past two years, we've seen a clear trend: established gold mining operations across Africa, Central Asia, and South America are diversifying away from single European suppliers.

The reasons are consistent:

Same or better lab-verified performance
30-40% lower procurement cost
Shorter lead times and more responsive logistics
No long-term contract lock-in
Willingness to provide trial samples before commitment

Recent HMGOLD shipments include 112 tons to a Tanzanian CIL plant, 56 tons to a Ghanaian CIP operation, and multiple repeat orders to mines in Sudan, Niger, and Egypt.

Get Free Samples for Your Plant Trial

The only way to truly compare activated carbon performance is to test it in your actual ore and process conditions. Lab specs matter, but plant results matter more.

We offer:

Free 25kg sample of HMGOLD™ (any grade: 6000/7000/7500/PLUS)
Technical consultation on mesh size selection for your circuit
SGS/third-party test reports for your procurement team's review

How to request:

Tell us your ore type, processing method (CIP/CIL/CIC), current carbon brand, and monthly consumption. We'll recommend the right grade and ship samples within 1 business days.

Huamei Carbon is an activated carbon manufacturer based in China with 700+ tons monthly capacity. HMGOLD™ is our dedicated product line for gold recovery applications, serving mines in 40+ countries.

Activated Carbon for Gold Recovery: A Practical Buyer's Guide (2026)

Activated carbon is the backbone of gold extraction in CIL and CIP circuits. The right carbon means higher gold loading, fewer losses, and lower cost per ounce recovered. The wrong one means money left in the tailings.

This guide covers what you actually need to know when sourcing activated carbon for gold recovery — specs, grades, pricing, and how to avoid overpaying.

How Activated Carbon Works in Gold Recovery，Activated carbon adsorbs gold-cyanide complexes [Au(CN)₂]⁻ from leach slurry. It's used in three main circuit types:


CIL (Carbon-in-Leach)	Carbon added directly to leach tanks	8–24 hours
Process	How It Works	Carbon Contact
CIP (Carbon-in-Pulp)	Carbon contacts already-leached pulp	4–8 hours
CIC (Carbon-in-Column)	Heap leach solution passes through carbon columns	Continuous

In all three, gold loads onto the carbon surface, then gets stripped (desorbed) with hot caustic cyanide solution, and the carbon gets reactivated for reuse.

A well-performing carbon typically achieves 95–99% gold recovery from solution.

Key Specifications for Gold Recovery Carbon

Not all activated carbon works for gold. Here's what separates gold-grade carbon from generic water treatment carbon:

Parameter	Gold Recovery Grade	Water Treatment Grade
iodine Number	1000–1100 mg/g	800–1000 mg/g
Gold Activity (K value)	≥25 mg Au/g	Not tested
Hardness Number	≥98%	≥98%
Particle Size	6×12 mesh	8×30mesh 12×40mesh etc
Ash Content	≤3%	≤3%
Moisture	≤5%	≤5%
Apparent Density	0.45–0.55 g/mL	0.40–0.55 g/mL

The two specs that matter most: hardness and gold activity.

Hardness determines how many reactivation cycles your carbon survives. Low hardness = high attrition = carbon loss = gold loss. In a typical CIL plant, carbon goes through 50–200 reactivation cycles over its lifetime.

Gold activity (K value) measures how fast and how much gold the carbon can adsorb. Tested by the Mintek method or similar — if your supplier can't provide this number, that's a red flag.

Coconut Shell vs Coal-Based: Which One for Gold?

Short answer: coconut shell wins for gold recovery, almost always.

Parameter	Coconut Shell	Coal-Based
Hardness	98–99.5%	90–95%
Gold Activity	Higher (micropore-dominant)	Lower
Attrition Loss	0.5–2% per cycle	3–5% per cycle
Reactivation Cycles	100–200+	50–100
Price (FOB China)	$3200–3700/ton	$550–1700/ton
Best For	CIL/CIP circuits,CIC columns	ower-grade ores

Coconut shell carbon has a micropore-dominant structure (pore diameter <2nm), which is ideal for adsorbing the relatively small gold-cyanide complex. Coal-based carbon has more mesopores — better for larger organic molecules, not as efficient for gold.

When coal-based makes sense: If you're running a heap leach with CIC columns and your solution is relatively clean (low organics), coal-based can work at a lower cost. But for CIL/CIP with abrasive slurry, coconut shell's hardness advantage pays for itself.

How to Choose the Right Carbon for Your Operation

Choosing carbon isn't just about specs on a datasheet. Consider these factors:
1.Your circuit type,

• CIL with high-abrasion ore → need hardness ≥97%
• CIP with clean pulp → hardness ≥95% is fine
• CIC columns → coal-based can work, saves 30–40% on carbon cost

2.Your ore characteristics,

• High organic content (preg-robbing ore) → need higher activity carbon, consider acid-washed grade
• High calcium/magnesium → carbon fouling risk, plan for more frequent reactivation
• Fine-grained gold → longer contact time needed, higher carbon concentration

3.Your reactivation setup

• Rotary kiln available → standard carbon works
• No kiln → consider buying carbon with higher initial activity to extend cycle life
• Outsourcing reactivation → factor in transport costs

4.Total cost of ownership, Don't just compare $/ton.

Calculate:True cost = (Carbon price × Annual consumption) + (Gold lost to attrition) + (Reactivation cost × Cycles/year)

A $2,200/ton coconut shell carbon that lasts 150 cycles often costs less than a $1,400/ton coal-based carbon that lasts 60 cycles — especially when you factor in the gold trapped in discarded fines.

Specifications We Supply for Gold Recovery

At our factory, we produce coconut shell activated carbon specifically for gold mining operations. Here are our standard gold-grade specs:

Raw Material:100% coconut shell
Iodine Number:≥1050 mg/g
Gold Activity (K) :≥28 mg/g
Hardness:98%
Particle Size: 6×12 mesh
Ash Content：≤2.5%
Moisture：≤5%
Packaging：25kg PP bags or 500kg jumbo bags

We test every batch for gold activity — not just iodine number. We can provide SGS or third-party test reports on request.

Current production capacity: 500 tons/month for gold-grade carbon.

Common Problems and How to Avoid Them

Problem: Gold recovery dropping over time
• Cause: Carbon fouling from organics or calcium
• Fix: Acid wash (3% HCl) before reactivation, or switch to acid-washed carbon

Problem: High carbon attrition

• Cause: Carbon too soft for your circuit, or over-screening
• Fix: Switch to higher hardness grade (≥97%), check screen condition

Problem: Gold not stripping completely

• Cause: Carbon poisoned by mercury or sulfides
• Fix: Increase strip temperature, extend strip time, or replace carbon batch

Problem: Inconsistent quality between shipments

• Cause: Supplier blending different raw materials
• Fix: Request batch-specific test reports, specify "100% coconut shell, no blending"

FAQ

What iodine number is best for gold recovery?
For CIL/CIP gold recovery, target an iodine number of 1000–1200 mg/g. But don't rely on iodine number alone — it measures total adsorption capacity for small molecules, not specifically gold. Always ask for the gold activity (K value) test result, which directly measures gold adsorption performance. A carbon with iodine 1050 and K value ≥28 is a solid performer.
How long does activated carbon last in a gold plant?
In a well-managed CIL/CIP circuit, coconut shell activated carbon typically lasts 100–200 reactivation cycles before it needs full replacement. That translates to 1–3 years depending on your reactivation frequency and ore abrasiveness. Annual carbon consumption for a typical 3,000 tpd gold plant runs 50–150 tons.
What's the difference between CIL and CIP carbon requirements?
The carbon specs are essentially the same — both need high hardness, high gold activity coconut shell carbon in 6×12 mesh. The difference is operational: CIL carbon sees more abrasion because it's in the leach tanks with fresh ore, so you may want to spec slightly higher hardness (≥98%) for CIL versus ≥97% for CIP.
Can I use the same carbon for gold and water treatment?
Technically yes, but it's wasteful. Gold-grade carbon costs more because it's made to tighter specs (higher hardness, tested for gold activity, lower ash). Water treatment carbon doesn't need these properties. Going the other direction — using water treatment carbon for gold — will give you poor recovery and high attrition losses. Don't do it.
How do I test carbon quality when it arrives?
Three quick checks on delivery:
1. Visual: Uniform black granules, no dust or fines, no foreign material,
2. Hardness test: Shake a sample in a sealed container for 5 minutes, screen at 12 mesh — loss should be <5%,
3. Moisture: Weigh, oven-dry at 105°C for 2 hours, reweigh — should be <5%,

For gold activity, you'll need a lab test (takes 24–48 hours). We provide pre-shipment test reports so you know what's coming.

84 Tons of Activated Carbon for Gold Recovery to Egypt

How to Choosing the Right Activated Carbon for Water Treatment?