Gold does not arrive at the end of a processing plant simply because it was present in the ore.

Between ore entering the plant and recoverable gold leaving it sits a carefully controlled sequence of crushing, grinding, leaching, adsorption, elution and recovery processes.

For many gold-processing operations, activated carbon plays a critical role in that chain.

It may look like an ordinary black granular material, but its physical characteristics allow it to capture dissolved gold from process solutions.

For mining companies and procurement teams, this creates an important distinction.

Activated carbon should not be treated simply as another consumable to be purchased at the lowest available price.

Its performance can affect the efficiency and economics of the gold-recovery circuit.

What Is Activated Carbon?

Activated carbon is a highly porous carbon material manufactured to provide a very large internal surface area.

Think of a granule of activated carbon less like a solid stone and more like an extremely complex microscopic network of pores.

Those pores create the surface on which adsorption can occur.

Adsorption is different from absorption.

In absorption, one material enters the volume of another.

In adsorption, molecules or ions accumulate on a surface.

That difference is central to understanding activated carbon’s role in gold processing.

First, the Gold Has to Enter Solution

Gold contained within ore cannot simply attach itself to activated carbon.

It first needs to be made available in a dissolved form through the plant’s leaching process.

In conventional cyanidation, gold is dissolved into solution and forms a soluble gold-cyanide complex.

Activated carbon can then adsorb this dissolved gold complex from the process stream.

Once sufficiently loaded, the carbon is separated and transferred for subsequent processing, where the gold is removed from the carbon.

The carbon can then be treated and returned to the circuit, depending on plant design and carbon condition.

The overall system is therefore cyclical.

The plant is not simply “using carbon.”

It is managing an adsorption medium that repeatedly moves through loading, recovery and regeneration stages.

CIP and CIL: What Is the Difference?

Two terms frequently encountered in gold processing are CIP and CIL.

They are related, but they are not identical.

Carbon-in-Pulp

In a Carbon-in-Pulp, or CIP, circuit, gold is first leached from the ore.

The resulting pulp then passes through adsorption stages containing activated carbon.

The dissolved gold complex adsorbs onto the carbon.

In simplified terms:

Leach first, then adsorb.

Carbon-in-Leach

In Carbon-in-Leach, or CIL, leaching and carbon adsorption take place within the same overall tank train.

Activated carbon is present while gold dissolution is occurring.

In simplified terms:

Leach and adsorb together.

The appropriate circuit depends on ore characteristics, process design, economics and other metallurgical considerations.

CIL can be particularly useful with certain preg-robbing ores because activated carbon competes for dissolved gold that might otherwise be adsorbed by naturally occurring carbonaceous or other adsorptive constituents within the ore.

The important procurement lesson is that activated carbon exists within a process.

Its suitability should therefore be considered in relation to that process.

Why Coconut-Shell Activated Carbon Is Common in Gold Recovery

Activated carbon can be manufactured from different carbonaceous raw materials.

For gold recovery, coconut-shell activated carbon is widely used because it can combine desirable adsorption characteristics with mechanical strength.

Mechanical strength matters because carbon in a CIP or CIL circuit does not spend its life sitting peacefully inside a bag.

It is exposed to agitation, pumping, screening, transfer and repeated processing.

Weak carbon can break down.

When valuable gold is loaded onto carbon, excessive carbon loss becomes more than a consumables problem.

It can become a precious-metal loss problem.

Hardness Matters

Imagine buying two activated carbons.

Both appear to adsorb gold effectively in an initial test.

But one is significantly more susceptible to abrasion.

As it circulates through the plant, more particles break into fines.

Those fines may be difficult to retain effectively within the circuit.

Now consider what those carbon particles may contain.

Gold.

This is why hardness and abrasion resistance matter.

The procurement team may see only a price difference per tonne.

The processing team sees something different:

How much of this carbon will survive the circuit?

That is a much more commercially useful question.

Adsorption Activity Matters Too

Mechanical strength alone is not enough.

The carbon must also adsorb gold effectively.

Important performance characteristics can include adsorption rate and loading behaviour.

A carbon that is physically strong but performs poorly as an adsorbent is not automatically a good choice.

Similarly, a carbon that adsorbs rapidly but breaks down excessively may create another set of operational problems.

Good carbon selection therefore involves balance.

The plant needs material with properties suited to its circuit.

Particle Size Is More Important Than It Looks

Particle-size distribution affects how carbon behaves within the adsorption circuit.

Particles must be large enough to be retained by appropriate screening systems while still providing suitable adsorption performance and mass-transfer characteristics.

Excessive fines can create losses.

Inconsistent particle size can also affect handling and circuit behaviour.

This is one reason serious industrial buyers should look beyond the words “activated carbon” on a quotation.

A proper specification matters.

What Is Carbon Attrition?

Attrition is the gradual wearing and breakdown of carbon particles through mechanical action.

In an operating plant, carbon is:

mixed,
pumped,
screened,
transferred,
washed,
eluted,
regenerated,
and returned to service.

Each stage creates opportunities for mechanical degradation.

Some loss is unavoidable.

The objective is to manage it.

Carbon with poor mechanical characteristics can increase replacement requirements and potentially increase the risk of losing gold-bearing fines.

For procurement teams, a lower purchase price therefore needs to be considered alongside expected carbon consumption and performance.

Activated Carbon Does Not Stay Clean Forever

As carbon moves through a gold-recovery circuit, other substances can accumulate on or within it.

This is commonly referred to as fouling.

Inorganic scale, organic material and fine solids can interfere with the carbon’s pore structure or surface, potentially reducing its ability to adsorb gold efficiently.

This is why plants may incorporate processes such as acid washing and thermal regeneration.

Regeneration is intended to restore carbon performance so that it can be returned to the adsorption circuit.

But regeneration itself must be properly controlled.

Excessive damage during repeated cycles can contribute to carbon degradation.

Once again, carbon performance is a lifecycle issue, not simply a purchase-price issue.

Procurement Should Ask Better Questions

When sourcing activated carbon for gold recovery, “How much per tonne?” should not be the only question.

A stronger procurement conversation includes:

What is the carbon made from?

Understand the raw material and product type.

What particle-size specification is being supplied?

Consistency matters.

What performance data is available?

Request appropriate technical information relevant to the intended application.

What information is available on hardness and abrasion resistance?

The carbon needs to survive the physical environment of the circuit.

What is the product’s adsorption performance?

The supplier should be able to provide relevant product specifications or test information.

What documentation accompanies the shipment?

Depending on the purchasing requirements, this may include product specifications, Certificate of Analysis, Safety Data Sheet and other quality documentation.

Is batch consistency controlled?

A successful trial is useful.

Consistent supply over subsequent shipments is better.

What is the lead time?

Activated carbon is process-critical. Running short is not an attractive procurement strategy.

Ghana’s Mining Supply Chain Makes This Particularly Relevant

Gold mining remains a major part of Ghana’s industrial economy.

The Ghana Chamber of Mines reported that mining companies spent approximately US$3.5 billion on goods and services in 2024, reflecting the scale of the industry’s procurement ecosystem.

Ghana’s local-content framework is also encouraging greater domestic participation in mining supply chains.

Activated carbon appears on the Minerals Commission’s mining procurement list.

That matters.

It means the conversation around activated carbon in Ghana is not only metallurgical. It is also connected to procurement strategy, local participation, supplier capability and industrial development.

For Ghanaian suppliers, however, local presence alone is not enough.

Mining operations require products that meet demanding technical, safety and supply requirements.

That means local suppliers seeking to serve this market need to build credibility around specification, documentation, logistics and consistency.

The Cheapest Carbon Can Be an Expensive Decision

Consider two products.

Carbon A costs less per tonne.

Carbon B costs more.

On a purchase-order comparison, Carbon A wins.

But what happens if Carbon A:

breaks down faster,
requires more frequent replenishment,
produces more fines,
performs inconsistently,
or creates additional operational difficulty?

The correct economic comparison changes.

Instead of looking only at:

purchase price per tonne

the operation should consider:

carbon consumption + adsorption performance + losses + operating impact + supply reliability.

This principle applies to many industrial chemicals, but it is particularly important where the consumable interacts directly with valuable process material.

Supply Continuity Matters

Gold-processing plants cannot base critical consumables on hope.

Activated carbon procurement should consider:

• normal consumption
• expected replacement rate
• available warehouse stock
• supplier stockholding
• manufacturing lead time
• international shipping time where applicable
• customs and inland logistics
• contingency stock
• forecast changes in plant demand

A reliable supplier should understand that the requirement is not simply to deliver carbon once.

The requirement is to support continuity.

Activated Carbon Is Part of a System

There is no universally “best” activated carbon independent of application.

Plant design, ore characteristics, circuit configuration, operating conditions, regeneration practices and other factors all influence performance.

For this reason, changes to process-critical materials should be evaluated with the appropriate metallurgical and operational expertise.

Procurement’s role is to ensure that commercial pressure does not disconnect purchasing decisions from technical requirements.

The best purchasing decision is the one that supports the plant’s actual objective:

recovering gold safely, consistently and economically.

Sourcing Activated Carbon for a Mining Operation in Ghana?

Aviv Kitov Group supports mining and mineral-processing operations with specialised industrial chemical supply and strategic sourcing.

If your operation requires activated carbon, process chemicals or other mining inputs, our team can work from your required specification, quantity and delivery schedule to identify appropriate supply options through our local and international sourcing network.

Send us your:

product specification
required quantity
delivery location
expected delivery schedule

and our industrial supply team will help you assess the requirement.

Request an Activated Carbon Supply Quote from Aviv Kitov Group.

Technical note: Gold-processing circuits involve hazardous chemicals and specialised metallurgical processes. This article is for general information and procurement education only. Process design, chemical dosing and operational decisions should be undertaken by appropriately qualified personnel.