Tin Concentrate Supplier in Nigeria: Cassiterite, Assays and Smelter Terms

Tin concentrate buying begins with a distinction between cassiterite ore, concentrate and refined tin metal. A smelter, an industrial metal user and an investor in a processing facility need different products and evidence. Wigmore Trading helps buyers define a sourcing enquiry around the material, assay, origin and delivery requirements.

For a Nigerian tin ore exporter or concentrate enquiry, provide the target specification, volume and receiving processor. If you need industrial tin for the UK or another market, say whether you require refined metal, an alloy or a mineral feedstock. The same quoted price cannot meaningfully describe all of these.

Agree the tin content and settlement basis

Specify the tin assay, moisture, particle size and relevant impurities. State whether the reported grade is elemental tin or another reporting basis. Ask for the laboratory method and sample identity. A shiny mineral specimen or a high-grade hand sample is not a representative assay of a commercial lot.

Agree how the shipment is sampled, weighed and tested, and how a disputed result is handled. Pricing may depend on payable contained metal and processor terms, but the exact formula must be written. A benchmark metal price is not the same as the price of a tonne of concentrate.

Smelter acceptance comes before dispatch

Ask the intended smelter to review the complete assay and material description. Impurities, associated minerals and physical form can affect acceptance or charges. If a qualification sample is needed, connect it to the proposed lot and retain the written acceptance criteria.

Where tin occurs alongside tantalum or niobium-bearing minerals, do not assume the buyer pays for every component. Identify which elements are payable, which attract penalties and which require further separation. Mixed material needs a clear description and a processor able to handle it.

Source verification and traceability

Request the mine or aggregation origin, seller identity, authority to sell and the relevant mineral trading and movement documents. Verify the applicable Nigerian permissions, royalty and export requirements with the responsible authority. Do not accept a generic company registration as proof of a right to mine, possess or export a lot.

Tin is one of the minerals for which responsible-sourcing due diligence is especially important. Keep chain-of-custody records and investigate source and payment risks rather than relying on a “conflict free” declaration alone. Ask what evidence your customer or smelter requires.

Transport and material classification

Have a qualified party assess the material for transport requirements, including any relevant hazardous or naturally occurring radioactive constituents. Do not assume a concentrate is ordinary non-hazardous cargo without its characterization. Agree packaging, sealing and handling arrangements with the carrier for the actual material.

State the loading and delivery points, port, shipment window and responsibility for documentation. The commercial plan should allow for sampling, inspection and clearance. Avoid committing to a vessel or truck schedule before the lot is documented and accepted for transport.

Tin smelter or processing investment enquiries

A tin smelter in Africa requires more than access to concentrate. Define the feed mix, process route, recoveries, energy, environmental controls and product market through a qualified feasibility study. Equipment quotations need an engineering specification and a credible source of feedstock.

Review the project separately from a concentrate purchase. Mining rights, processing permissions, financing and plant operation are different responsibilities. We do not describe Wigmore as owning a tin smelter or guarantee that a project will be financed or profitable.

Compare offers on the same basis

Request the grade, payable terms, deductions, packaging, freight and inspection charges in one written offer. Agree when risk and title transfer and how final settlement is calculated. A low ex-site price can become expensive if transport, moisture deductions or processor charges are omitted.

For repeat contracts, specify how lot quality and source records are maintained. Keep substitution and rejection rules explicit. A buyer should be able to identify which material was delivered and why the final invoice differs from a provisional estimate.

Send a tin procurement brief

Tell Wigmore Trading the product form, assay limits, tonnage, intended smelter or industrial use and destination. We can discuss sourcing, verification and logistics as a defined service scope. Availability, legality and acceptance are checked for the proposed lot before a commercial commitment is confirmed.

Related sourcing and equipment guides

• Lithium Supplier in Nigeria: Concentrate, Assays and Processing Enquiries
• Tantalite and Coltan Suppliers in Africa: Responsible Procurement Guide
• Rare Earth Suppliers in Africa: Assays, Magnet Materials and Project Checks

For a broader sourcing brief, see Nigerian mineral procurement and discuss the required service scope.

Reference information

• Nigeria mineral export permit application guidance
• OECD responsible mineral supply chains

Reviewed 24 October 2026. Confirm current requirements for the actual product, activity and destination with the responsible authority and professional advisers before committing to a transaction.