We recently shipped 13 tons of HMGOLD7000 coconut shell activated carbon for gold recovery to a mining client in Djibouti. One 20-foot container, packed with 25 kg bags, departed from our factory and headed to the Port of Djibouti.
This article covers the order background, why a 20GP container was the right fit for this volume, and how we ensure quality from factory floor to container seal.
| Item | Details |
|---|---|
| Product | HMGOLD7000 coconut shell activated carbon
for gold recovery |
| Quantity | 13 tons |
| Container | 1 × 20GP |
| Packaging | 25 kg PP woven bags |
| Destination | Port of Djibouti, Djibouti |
| End use | Gold recovery (CIL/CIP process) |
Djibouti sits at the Horn of Africa, where the Red Sea meets the Gulf of Aden. While the country's own gold mining sector is still developing, Djibouti's port and free trade zone make it a logistics gateway for the broader East African gold belt — including Ethiopia, Somalia, and parts of Sudan and Eritrea, all of which have active gold operations.
This particular order went directly to a mining operation in Djibouti. The client needed a reliable supply of gold recovery carbon with consistent adsorption performance for their CIL circuit. After evaluating samples, they placed an initial order of 13 tons — a practical volume for a 20GP container and a good starting point to validate the carbon in their plant before scaling up.
A standard 20-foot container (20GP) handles up to 21–22 tons of payload. For 13 tons of activated carbon, it's the right choice:
Every shipment from our factory follows the same process, whether it's 13 tons to Djibouti or 140 tons to Egypt:
For clients who can't visit the factory — which is most of our African customers — these loading photos and videos are their eyes on the ground. It's not a sales gimmick. It's how we've built repeat orders across 40+ countries.
HMGOLD7000 is our mid-range gold recovery carbon, designed for CIL and CIP circuits that need solid adsorption kinetics without the premium price tag of our top-tier HMGOLD7500. It's made from coconut shell, steam-activated in our kilns in Fujian and Ningxia provinces, China.
HMGOLD7000 is a proven workhorse in gold plants across East Africa, West Africa, and Central Asia. For full specifications, visit our HMGOLD product page.
Yes. We ship regularly to ports across East Africa, including Djibouti, Dar es Salaam, Mombasa, and Port Sudan. Djibouti's port handles container cargo efficiently, and we can arrange CIF or FOB terms depending on your preference.
Our minimum order quantity is 10 tons — enough to fill a 20GP container. For first-time buyers, we recommend starting with one container to test the carbon in your plant, then scaling up based on results.
We provide pre-shipment samples and test reports for every batch. You can also arrange third-party inspection (SGS, Bureau Veritas, Intertek) at our factory. During loading, we share real-time photos and videos via WhatsApp so you can monitor the process remotely.
Need gold recovery carbon delivered to East Africa? We've shipped to Djibouti, Tanzania, Egypt, Niger, Benin, Sudan, Ghana, and more. Tell us your volume and specs — we'll quote within 24 hours.
A Turkish water treatment company ordered 28 tons of A500 coal-based granular activated carbon in jumbo bags. Their biggest concern wasn't specs or pricing — it was trust. They couldn't be in China to watch their cargo get loaded.
So we solved that the simplest way possible: real-time loading photos and videos sent directly to the buyer throughout the container stuffing process.
| Item | Details |
|---|---|
| Product | A500 Coal-Based Granular Activated Carbon |
| Quantity | 28 tons |
| Mesh Size | 8×30 |
| Iodine Value | ≥900 mg/g |
| Packaging | Jumbo bags |
| Destination | Turkey |
| Application | Water treatment |
When you're buying 28 tons of activated carbon from a factory 7,000 km away, there's a moment of doubt every buyer knows: Is the right product actually going into my container?
This Turkish client said it directly — his biggest psychological barrier was not being able to watch the loading in person. He'd ordered from other Chinese suppliers before. Not all of those experiences were smooth.
Here's what we did:
This isn't a premium service we charge extra for. It's standard practice for every shipment. If you can't be here, we bring the loading floor to your phone.
This case illustrates something we see regularly: the product spec is rarely the hard part. Trust is.
Activated carbon is a commodity with well-defined test standards. Any qualified manufacturer can hit an iodine value of 900 mg/g. What separates suppliers is everything around the product — communication speed, documentation accuracy, loading transparency, and what happens when something goes wrong.
For first-time buyers, we recommend:
If the supplier hesitates on any of these, that tells you something.
A500 is a coal-based granular activated carbon (8×30 mesh, iodine ≥900 mg/g) primarily used in water treatment — municipal drinking water, industrial process water, and wastewater polishing. It's effective for removing chlorine, organic compounds, taste, and odor.
For orders above 20 tons, jumbo bags are most common. We also offer 25 kg woven bags, and custom packaging based on your facility requirements.
Yes. Every shipment includes pre-loading, during-loading, and container-seal photos at no extra cost. Video clips via WhatsApp are available on request. This is standard — not a paid add-on.
Good news to share with you!
Huamei Activated Carbon has successfully completed the production and shipment of 46.2 tons of HMGOLD™7000 coconut shell activated carbon to Azerbaijan for gold recovery applications.
The activated carbon supplied in this project is specially designed for CIP/CIL gold extraction processes, where high adsorption capacity, excellent hardness, and stable performance are essential for efficient gold recovery.
Product: HMGOLD™7000 Coconut Shell Activated Carbon
Application: Gold Recovery
Raw Material: Coconut Shell
Size: 6×12 Mesh
Iodine Value: 1100 mg/g
Quantity: 46.2 Tons
Destination: Azerbaijan
In gold extraction operations, activated carbon is a key material that directly influences gold adsorption efficiency and overall recovery performance.
HMGOLD™7000 coconut shell activated carbon is manufactured from selected coconut shell raw materials and optimized through advanced activation technology. It features:
The microporous structure of coconut shell activated carbon makes it particularly suitable for gold recovery applications, providing efficient adsorption performance in CIP and CIL circuits.
At Huamei Activated Carbon, each batch of activated carbon undergoes strict quality inspection before shipment to ensure consistency and compliance with customer requirements.
From raw material selection, activation process control, to final product testing, Huamei focuses on delivering stable and reliable activated carbon solutions for global mining customers.
With professional manufacturing experience and continuous quality improvement, Huamei Activated Carbon supports gold recovery operations worldwide with high-performance coconut shell activated carbon.
The Problem: Two Exhaust Streams, One Failing System
A chemical processing plant in Chile came to us with a headache that standard activated carbon couldn't solve.
Their production lines generate two types of exhaust simultaneously:
| Stream | Pollutant | Character |
|---|---|---|
| Line A exhaust | H₂S, SO₂ | Acidic gases |
| Line B exhaust | NH₃, amines | Alkaline gases |
The client had been running regular (non-impregnated) 4mm coal-based pellet carbon in both adsorption towers. The result:
The core issue: standard activated carbon relies purely on physical adsorption. For reactive gases like H₂S and NH₃ at elevated concentrations, physical adsorption alone is insufficient. You need chemical reactivity built into the carbon itself.
After reviewing the client's gas composition data, flow rates, and operating temperatures, we designed a matched pair:
For acid gas stream (H₂S, SO₂): KOH-impregnated 3mm coal-based pellet carbon. The potassium hydroxide on the carbon surface chemically neutralizes acid gases — not just traps them physically. This increases H₂S breakthrough capacity by 5–8× compared to standard carbon.
For alkaline gas stream (NH₃, amines): Phosphoric acid-impregnated 3mm coal-based pellet carbon. The H₃PO₄ reacts with alkaline gases on contact, converting them to stable salts retained in the carbon pore structure.
Same pellet diameter (3mm), same base carbon, same tower configuration — but completely different chemistry matched to each gas stream. The client doesn't need to modify any hardware. Just swap the carbon.
The client's existing adsorption towers were designed for 3mm pellets. Pressure drop, contact time, and flow distribution are all optimized for this diameter. Using 4mm would reduce surface area per unit volume; using smaller sizes would increase pressure drop beyond their blower capacity. We matched the spec to their installed system — zero retrofit cost.
Impregnated carbon is not the same as standard carbon when it comes to packaging. The chemical reagent on the surface is moisture-sensitive — if humidity gets in during transport, the impregnation degrades before the carbon ever reaches the adsorption tower.
Our packaging solution for this shipment:
Impregnated grades (KOH + H₃PO₄):
For comparison — standard (non-impregnated) carbon bags:
The visual difference is unmistakable. When this mixed shipment arrives at the client's warehouse, workers can identify impregnated vs. standard bags instantly — round puffy bags get stored in the dry warehouse, square bags go to general storage.
| Item | Detail |
|---|---|
| Product | 3mm coal-based impregnated pellet activated carbon |
| Quantity | 30 tons total |
| Configuration | KOH-impregnated + H₃PO₄-impregnated (split shipment) |
| Destination | Chile |
| Application | Chemical plant dual-stream exhaust treatment |
| Lead time | 28 days (including impregnation + curing + QC) |
After installation and commissioning:
The client has since signed a long-term supply agreement for quarterly replenishment shipments — the same dual-impregnation configuration, delivered on a rolling schedule.
Most activated carbon suppliers offer one product and tell you to make it work. The reality for chemical plants with complex exhaust profiles:
We don't sell generic carbon and hope it fits. We start with your gas analysis, design the impregnation to match, and deliver with packaging that keeps the chemistry intact across 10,000+ miles of ocean shipping.
No. KOH-impregnated carbon is alkaline — it neutralizes acid gases (H₂S, SO₂, HCl). Phosphoric acid-impregnated carbon is acidic — it neutralizes alkaline gases (NH₃, amines). Using one type for both is chemically impossible. Dual-stream plants need both types, matched to each exhaust line.
For target pollutants: typically 4–8× longer bed life. Standard carbon at 50 ppm H₂S inlet might last 6–8 weeks. KOH-impregnated carbon under the same conditions lasts 6–12 months. The difference is mechanism — chemical reaction + physical adsorption vs. physical adsorption alone. ASTM D6646 provides the standard breakthrough test method for comparison.
10 tons per impregnation type. The impregnation bath is a batch process — reagent concentration must be controlled precisely for uniform loading. Mixing different impregnation types in the same batch risks cross-contamination. This Chile order at 30 tons split between two types was well above the minimum.
Yes. Our facility uses Taixi anthracite as base material — naturally low ash content means more available pore volume for impregnant loading. Higher pore volume = higher reagent capacity = longer service life. The dry climate is also ideal for impregnated carbon production — low ambient humidity reduces quality risks during the drying and packaging stages.
Need impregnated carbon matched to your specific gas treatment challenge? Send us your gas analysis — we'll design the right impregnation package. WhatsApp: +86 181-3792-7803
A gold mine in Ghana's Ashanti region had been running 6×12 mesh activated carbon in their CIP circuit for three years. Gold recovery was acceptable — 94.5% — but they were losing carbon at the interstage screens faster than they could account for. Screen blinding, carbon passing through slots, and frequent screen replacements were eating into their operating budget.
They switched to 8×16 mesh HMGOLD™ 7000 in Q1 2026. Fifty-six tons. This is what changed and why the mesh size decision matters more than most operators realize.
| Parameter | CIL (Carbon-in-Leach) | CIP (Carbon-in-Pulp) |
|---|---|---|
| Carbon residence | In leach tanks with agitation | In adsorption tanks, counter-current flow |
| Slurry abrasion | High (grinding media present) | Moderate (no grinding media) |
| Screen slot size | 0.8–1.0 mm typical | 0.6–0.8 mm typical |
| Standard carbon size | 6×12 mesh | 6×12 or 8×16 mesh |
| Carbon transfer | Pumped between leach tanks | Pumped counter-current to slurry flow |
| Key carbon requirement | Maximum hardness (resist grinding) | Good kinetics + screen compatibility |
The core difference: CIL tanks contain both leaching reagent and grinding media — carbon takes a beating, so you want the biggest, hardest particles possible (6×12). CIP tanks separate leaching from adsorption — there's no grinding media, so you can use smaller carbon particles without catastrophic attrition.
Why smaller matters in CIP: Smaller carbon particles have more surface area per unit mass. More surface area = faster gold adsorption kinetics = higher gold loading per cycle = fewer carbon transfers needed.
This Ghana mine's CIP circuit used 0.7 mm interstage screens. On paper, 6×12 mesh (smallest particle = 1.7 mm) should have no trouble staying behind those screens. In reality:
| Issue | What happened | Root cause |
|---|---|---|
| Screen blinding | Screens clogged
every 72–96 hours |
Oversized carbon trapped
fine ore particles against the screen surface |
| Carbon passing | 0.3% carbon loss
per transfer stage |
Breakage of larger
6×12 particles created sub-1.7mm fragments that passed through slots |
| Slow kinetics | Required 5 adsorption stages to
reach 94.5% recovery |
Large particles = lower
surface-to-volume ratio = slower gold uptake |
| Screen replacement | Every 6 weeks | Pressure differential
from blinding stressed screen panels |
The mine was spending $18,000/month on screen maintenance alone — plus the hidden cost of gold lost with passing carbon.
8×16 mesh carbon particles range from 1.0 to 2.4 mm. That's smaller than 6×12 (1.7–3.4 mm) but still well above the 0.7 mm screen slot size.
| Metric | Before (6×12) | After (8×16 HMGOLD™ 7000) | Change |
|---|---|---|---|
| Gold recovery | 94.5% | 96.8% | +2.3 points |
| Adsorption stages needed | 5 | 4 (same tanks,
one taken offline for maintenance) |
-1 stage |
| Carbon loss
per cycle |
0.3% | 0.15% | -50% |
| Screen cleaning frequency | Every 72–96
hours |
Every 168+ hours | -55% fewer cleanings |
| Screen
replacement interval |
6 weeks | 14 weeks | +133% longer life |
| Carbon loading
(g Au/kg C) |
3,200 | 4,100 | +28% |
| Screen
maintenance cost |
$18,000/month | $7,500/month | -58% |
The math on 2.3% recovery improvement: On a mine producing 3,000 oz/month, 2.3% additional recovery = ~69 oz/month × $2,300/oz = $158,700/month in additional gold revenue. Against a carbon cost of roughly $85,000 for 56 tons. Payback: under 20 days.
| Parameter | Value |
|---|---|
| Mesh size | 8×16 (US standard) |
| Particle size range | 1.0–2.4 mm |
| Iodine number | ≥1100 mg/g |
| Hardness (ball-pan) | ≥98% |
| Attrition (Wenman test) | ≤2% |
| Ash content | <3% |
| Moisture | ≤5% |
| Bulk density | 0.48–0.52 g/cm³ |
| Gold adsorption rate (K value) | ≥3.2 mg Au/g C/hr |
| Equilibrium loading | ≥30 mg Au/g C |
| Raw material | 100% coconut shell |
HMGOLD™ series full specifications →
| Your situation | Recommended mesh | Reason |
|---|---|---|
| CIL circuit (carbon in leach
tanks with ball mill discharge) |
6×12 | Maximum particle size =
maximum survival in abrasive environment |
| CIP circuit with
≥0.8 mm screen slots |
8×16 | Better kinetics, less
screen blinding, acceptable attrition |
| CIP circuit with
0.5–0.6 mm screen slots |
6×12 | Safety margin — 8×16
fines might pass through |
| CIC columns
(carbon in column) |
6×12 or 5×10 | Column flow dynamics
need larger particles for permeability |
| Heap leach
with carbon columns |
6×12 | Dirty solution = need
robustness over kinetics |
Rule of thumb: If your screen slot size is ≥0.7 mm and you're running CIP (not CIL), test 8×16 mesh. The kinetics improvement alone typically justifies the switch. If you're running CIL with SAG/ball mill discharge in the same tanks, stay with 6×12 — the abrasion environment is too harsh for smaller particles.
| Item | Detail |
|---|---|
| Product | HMGOLD™ 7000 (8×16 mesh) |
| Quantity | 56 tons |
| Destination | Ashanti Region, Ghana |
| Port | Tema |
| Lead time | 35 days (order to port arrival) |
| Application | CIP gold recovery |
| Previous carbon | 6×12 mesh (competitor brand) |
Not inherently. Hardness is a property of the carbon material itself, not the particle size. HMGOLD™ 7000 in 8×16 mesh has the same ≥99% ball-pan hardness as the 6×12 version — same raw material, same activation process, just screened to a different size fraction. What changes is abrasion behavior: smaller particles have more surface area exposed to mechanical forces per unit mass, so they experience slightly higher proportional wear in highly abrasive environments (CIL). In CIP conditions (moderate agitation, no grinding media), 8×16 attrition is negligible.
Run a parallel basket test: load 5–10 kg of 8×16 mesh carbon in a screen basket within one of your existing CIP tanks. After 7 days, measure carbon loss (dry weight before vs after), gold loading, and check for screen passing. Compare against your current 6×12 performance. If carbon loss is <0.5% per cycle and gold loading is higher, scale up. Most mines see results within the first cycle (5–7 days).
Usually no. If you're going from 6×12 to 8×16, your existing screens (designed for 6×12) have slot sizes that will retain 8×16 particles with even more margin. The smallest 8×16 particle (1.0 mm) is still larger than typical CIP screen slots (0.6–0.8 mm). You might actually find screen blinding decreases because the smaller carbon particles create a less aggressive bridging pattern against the screen face.
Not recommended. CIC columns need good permeability for pregnant solution to flow through the carbon bed. Smaller particles create higher pressure drop and increase channeling risk. For CIC, stick with 6×12 or even 5×10 mesh for optimal flow characteristics. The exception: very small-scale CIC with low flow rates, where the
htmlpressure drop from 8×16 is manageable.
Minimal — typically 3–5% higher for 8×16 because the yield of that size fraction from raw activated carbon is slightly lower than 6×12. On HMGOLD™ 7000, the difference is approximately $30–50/ton. Negligible compared to the operational savings from better kinetics, less screen maintenance, and higher gold recovery.
Need HMGOLD™ 8×16 mesh samples for CIP testing? Free 2kg sample, COA included. WhatsApp: +86 181-3792-7803 | Request quote →
A Tanzania-based gold mining operation needed 112 tons of coconut shell activated carbon for their CIL (carbon-in-leach) circuit. Their core concern: the aggressive agitation conditions in their tanks were destroying carbon too fast — high attrition loss, frequent top-ups, and inconsistent quality between shipments from previous suppliers.
We supplied the full 112-ton order in a single shipment, with batch-level COA documentation and container loading coordinated to meet their production schedule.
The mine's processing team outlined three problems they'd been dealing with:
| Problem | Impact on operations |
|---|---|
| Carbon breaking
apart in agitated tanks |
Fines passing through
screens → gold loss to tailings |
| High attrition rate
(previous supplier: ~3% per cycle) |
Frequent carbon top-ups,
increased cost per ounce recovered |
| Quality inconsistency
between batches |
Unpredictable gold loading,
harder to optimize elution timing |
Their spec requirement was clear: they needed carbon that could survive 15+ adsorption-elution cycles without significant degradation, with consistent performance from the first ton to the last.
| Parameter | Specification | Test method |
|---|---|---|
| Raw material | Coconut shell | — |
| Mesh size | 6×12 (1.68–3.35 mm) | Sieve analysis |
| Iodine number | ≥1100 mg/g | ASTM D4607 |
| Hardness (ball-pan) | ≥98% | ASTM D3802 |
| Moisture | ≤5% | ASTM D2867 |
| Ash content | ≤3% | ASTM D2866 |
| Apparent density | 0.48–0.52 g/mL | ASTM D2854 |
| Gold adsorption activity (K value) | ≥28 mg Au/g C | In-house CIP simulation |
Why these numbers matter for gold mining:
Every shipment includes batch-level testing. For this 112-ton order (shipped across 5 containers), each container's carbon lot was tested separately:
The client received 5 individual COAs — one per container — so they could track performance differences (if any) between lots during operation. This is standard practice for mining clients who run continuous CIL circuits and need to correlate carbon performance with specific batches.
| Item | Detail |
|---|---|
| Total volume | 112 tons |
| Packaging | 1-ton FIBC jumbo bags (double-lined) |
| Containers | 5 × 20ft |
| Loading port | Xiamen, China |
| Destination | Dar es Salaam, Tanzania |
| Transit time | ~15 days |
| Shipping terms | FOB Xiamen (client
arranged ocean freight) |
Scheduling consideration: Gold mines run 24/7. A production stoppage because carbon ran out costs far more than the carbon itself. We coordinated production timing so all 5 containers shipped within the same week — the client received the full 112 tons in one customs clearance cycle rather than staggered deliveries that would each require separate port handling.
Some suppliers offer coal-based carbon at lower prices for gold recovery. Here's why most professional mining operations specify coconut shell:
| Factor | Coconut shell | Coal-based |
|---|---|---|
| Hardness | 98–99% | 95% |
| Attrition loss
per cycle |
0.5–1.5% | 2–4% |
| Gold loading
capacity |
Higher (more micropores) | Lower |
| Reactivation
cycles |
18–22 before
replacement |
8–12 before replacement |
| Cost per ton | Higher | Lower |
| Total cost of
ownership |
Lower (lasts longer,
less gold loss) |
Higher (frequent replacement
+ gold loss to fines) |
The upfront price difference between coconut and coal carbon is typically 30–40%. But when you factor in carbon life, gold loss from fines, and reactivation costs — coconut shell carbon usually costs less per ounce of gold recovered.
After 6 months of operation with our carbon, the client reported:
They've since placed a second order for the next production campaign.
| Parameter | What we offer |
|---|---|
| Product | Coconut shell activated carbon, |
| Standard grades | 6×12mesh |
| Iodine number | 1050–1200 mg/g |
| Hardness | ≥98% premium |
| Monthly capacity | 700+ tons (across 2
production facilities) |
| Packaging | 25kg bags, 500kg bags, or
1-ton jumbo bags |
| Certifications | ISO 9001, COA per batch,
SGS/BV inspection available |
| Key markets served | Tanzania, Ghana, Sudan, Mali,
DRC, South Africa, Ethiopia |
We supply activated carbon to CIL/CIP gold operations across East and West Africa. If you're evaluating suppliers or looking to reduce carbon consumption costs, send us your current carbon spec or COA — we'll confirm if our product matches and arrange samples for your own plant trial.
6×12 mesh (1.68–3.35 mm) is the standard size for gold CIL and CIP circuits. This size provides the right balance between gold adsorption kinetics (smaller particles adsorb faster) and screen retention (larger particles don't pass through inter-stage screens). Some operations use 6×16 for finer ore slurries.
High-quality coconut shell carbon with hardness ≥98% typically survives 18–22 adsorption-elution-reactivation cycles before reaching minimum particle size for screen retention. Actual lifespan depends on agitation intensity, slurry abrasiveness, reactivation kiln conditions, and operating temperature.
Commercial CIL operations typically achieve 4–8 kg of gold per ton of activated carbon, depending on head grade, cyanide concentration, carbon concentration in the circuit, and residence time. Higher iodine number carbon (≥1100) generally achieves the upper end of this range under optimized conditions.
This depends on circuit size, gold throughput, and carbon attrition rate. A typical medium-scale CIL operation processing 3,000–5,000 tons of ore per day uses 50–150 tons of activated carbon in circulation, with monthly top-up requirements of 10–30 tons to replace losses from attrition and fine generation.
Yes. After gold is stripped from the carbon through elution (hot caustic cyanide solution or Zadra process), the carbon is thermally reactivated at 700–850°C in a rotary kiln. This burns off organic contaminants and re-opens pore structure. Properly reactivated carbon recovers 90–95% of its original adsorption capacity.
