Buying copper ore at the mine gate, one truck at a time

Not all copper is bought as cathode in a warehouse. Processing plants in the Copperbelt need feed, and some buyers source ore directly from small and mid-sized mines, one truck at a time. In 2026 this was one of the most practical models we worked on in Zambia.

How the model works

1. Find operating mines that can load ore regularly, and check their licences against the mining cadastre.
2. Send the buyer's own trucks to the mine gate. The material never depends on the seller's logistics.
3. Sample jointly as each truck is loaded or unloaded, using an agreed method, and seal the samples.
4. Crush and assay at an independent laboratory both sides accept.
5. Pay per truck, against the assay, within an agreed short window.

Because the buyer controls the truck and the sample, neither side has to trust the other with much money at once.

The maths of grade

Ore is paid for its copper content, so grade and moisture matter more than tonnage. A worked example:

• One truck carries 30 wet tonnes.
• At 8% moisture, that is 27.6 dry tonnes.
• At a grade of 3% copper, it contains about 828 kg of copper.

Price is usually agreed as a share of the LME value of the contained copper, minus deductions for processing, recovery and transport. At low grades, transport can eat most of the value, which is why buyers set a minimum grade, often 2% copper or more, and why distance from the mine to the plant matters.

Risks to manage

• Grade varies from truck to truck and even within a truck. Sample every truck, not just the first.
• Sampling disputes. Agree the method, the lab and an umpire lab in writing before the first truck.
• Licences. Check that the mine holds a valid licence for the area the ore comes from.
• Upfront demands. Requests for 100% payment before loading, or for large "circumvention fees" to meet the mine owner, are warning signs. In one 2026 trial negotiation, the seller's side asked for both; the trial stalled.

Where Copper Supply helps

Post an ore requirement on the marketplace with your minimum grade, location and payment terms, and verified producers can respond directly. Use a deal room to keep the trial agreement, sampling records and assay results in one place.