Hakim AC Consumtion Tool in Gold Production Plants

What the Calculator Does

Carbon make-up is one of the largest recurring reagent costs in a gold plant. Getting the estimate right helps you budget procurement, size your regeneration kiln duty, and compare carbon suppliers on a true cost-per-tonne-treated basis.

The tool models the three real drivers of carbon consumption:

• Carbon advance rate — how much carbon moves through the adsorption circuit, driven by the gold adsorbed and the target loading.
• Attrition loss — mechanical breakage of carbon into fines that are lost through the screens; scales with ore throughput.
• Regeneration loss — thermal burn-off during reactivation; scales with the amount of carbon advanced.

Inputs You Provide

• Ore throughput — tonnes of ore processed per day (t/day)
• Gold head grade — grams of gold per tonne of ore (g/t)
• Recovery to carbon — fraction of gold adsorbed onto the carbon (%)
• Carbon loading — grams of gold held per kilogram of carbon (g Au/kg C)
• Attrition loss — carbon lost to breakage per tonne of ore (g C/t ore)
• Regeneration loss — carbon lost during thermal reactivation (% of advanced carbon)
• Carbon price — delivered cost of activated carbon (USD/kg)

Results You Get

• Gold in feed (g/day)
• Gold adsorbed (g/day)
• Carbon advance rate (kg/day)
• Attrition loss (kg/day)
• Regeneration loss (kg/day)
• Total make-up (kg/day)
• Specific consumption (g carbon per tonne of ore)
• Monthly and annual carbon requirement (tonnes)
• Projected annual cost (USD)

How the Numbers Are Calculated

The model follows the standard mass-balance approach used in gold plant carbon management, based on Fleming (2011) and Mellifiq technical specifications:

• Gold in feed = Ore throughput × Head grade
• Gold adsorbed = Gold in feed × Recovery to carbon
• Carbon advance rate = Gold adsorbed / Carbon loading
• Attrition loss = Attrition rate × Ore throughput
• Regeneration loss = Advance rate × Regeneration loss 
• Total make-up = Attrition loss + Regeneration loss

Why Mellifiq WCOC-11

Mellifiq WCOC-11 is a coconut shell based activated carbon engineered for gold adsorption in CIP, CIL, and carbon-in-column circuits. Its high hardness minimizes attrition loss, and its high gold activity maintains loading capacity through repeated regeneration cycles. Both of these directly lower the total make-up in the calculation above, which is where the real operating cost lives.

Read here : 

Why Is Coconut-Shell-Based Carbon More Suitable for Gold Extraction?

It is a direct, performance-matched alternative to Jacobi Goldsorb 6000. As the exclusive distributor of Mellifiq activated carbon, Hakim Chemicals & Engineering supplies WCOC-11 with full technical support, adsorption test programs, and reliable supply for operations in Oman and the MENA region.

Frequently Asked Questions

What is a typical activated carbon consumption in a CIL plant?

Specific consumption commonly falls in the range of roughly 30–60 g of carbon per tonne of ore, depending on ore abrasiveness, agitation intensity, screen design, and regeneration practice. Use the calculator with your own figures for a site-specific estimate.

What is the difference between attrition loss and regeneration loss?

Attrition loss is the physical breakage of carbon into fines that escape through the screens, and it scales with ore throughput. Regeneration loss is the burn-off during thermal reactivation, and it scales with how much carbon advances through the circuit. Both are reduced by using a harder, more thermally stable carbon such as Mellifiq WCOC-11.

Is this calculator free and does it work offline?

Yes. It is a free, browser-based tool that runs entirely offline once the page is loaded. No data is sent anywhere and no login is required.

Can I use it to compare carbon suppliers?

Yes. Enter the attrition and regeneration loss figures for each candidate carbon along with its price, then compare the resulting annual make-up tonnage and annual cost. This is the most reliable way to compare Mellifiq WCOC-11 Gold against Jacobi Goldsorb 6000 or other coconut shell carbons on a true total-cost basis.