Pb 17% ＋ Zn 25%
＝42%Above the screening threshold
Submit the lot details for further review. Acceptance, pricing and import eligibility remain subject to verification.
RTV PROCUREMENT · SOUTHEAST ASIA → CHINA
Mixed Lead-Zinc Concentrate Procurement
We evaluate mixed lead-zinc concentrates with combined Pb + Zn above 40%. Oxide and sulphide materials are assessed lot by lot.
For mine owners, processing plants, cargo owners and authorised traders. Start with separate Pb and Zn results, the cargo location and available quantity, then establish the assay, origin and delivery details.
Pb + Zn >40% is RTV’s commercial screening threshold. Material type, impurities, origin, documents and import eligibility still require review. Meeting the threshold is neither import approval nor a purchase commitment.
SEPARATE VALUES, COMBINED ASSESSMENT
42% and 40% have different outcomes
Hypothetical examples only: these are not inventory, assay reports or transaction records. Both values must concern the same lot on the same assay basis.
Pb 15% ＋ Zn 25%
＝40%Does not exceed the threshold
Exactly 40% does not satisfy >40%. Report the actual result without rounding it up.
Do not combine results from different samples, lots or dry/wet bases. Separate Pb and Zn values support both commercial screening and subsequent verification.
COMPOSITION FIRST, THEN THE CARGO
Four points to establish for mixed concentrates
Report Pb and Zn separately
The combined value is used for commercial screening, but each metal’s individual result must remain available. A statement of ‘42% combined lead and zinc’ alone is insufficient. Do not add results from different stockpiles.
One lot, one assay basis
Identify the report date, sample number and corresponding lot. Retain the stated dry or wet basis. Explain differences between sample dates or assay bases before evaluation.
Oxide or sulphide, and processing details
State the actual material type, processing method, particle size, packaging and moisture. Similar names or appearances do not establish identical composition, quantity or acceptance conditions.
Impurities, associated metals and title
Include available results for impurities such as As, Cd, Hg and Tl, associated metals such as Ag, and your relationship to the cargo owner. Mark missing information clearly. Payment for associated metals is negotiated per lot.
The two photos are appearance references for lead and zinc concentrates, not evidence of mixed-concentrate stock or a particular lot. Composition cannot be established by appearance.
YOUR FIRST SUBMISSION
Share available records and identify missing items
- Assay information
- Separate Pb and Zn results, available moisture and impurity data, assay basis, and report or sample identifiers.
- Physical lot
- Current location, stockpile or package identifiers, site photos and how they correspond to the report.
- Quantity and your role
- Separate current stock from planned output and wet tonnes from dry tonnes. Explain your relationship to the owner and which checks you can arrange.
- Proposed delivery
- Propose a loading port, land-border crossing or arrival transaction in China. The precise location, cost responsibilities and milestones are then negotiated.
Only have partial assay results or photos? Explain what is known and whether the report matches the cargo, then continue checking the lot.
How to prepare an offer →SOUTHEAST ASIAN DELIVERY ROUTES
Identify the location; agree responsibilities per lot
State the origin, current storage location and proposed delivery point separately. Storage location alone does not establish export readiness or delivery conditions.
FOB at shipment port
Laem Chabang · Hai Phong · Agreed Ho Chi Minh City terminal
Port FOB can be discussed with the named port, loading point, export procedures and shipment arrangements specified. The terminal, transport arrangements and responsibilities must be agreed.
Land-border delivery
Boten, Laos · Agreed Vietnam border point
Confirm the precise delivery point, current cargo location, inland transport and customs responsibilities. Land delivery is agreed separately and is not described as maritime FOB.
Transaction upon arrival in China
Qinzhou · Fangcheng · Nansha
For other cargo locations, transactions upon arrival in China are preferred for discussion. The contract must specify inspection, settlement and title-transfer milestones; arrival alone does not determine them.
These are delivery points open to discussion. They do not imply RTV owns a warehouse or has a permanent office at each location. Export arrangements, documents and import eligibility are checked per lot.
SUPPLIER QUESTIONS
Before you submit an offer
How is the mixed concentrate screening threshold calculated?
Add the separately reported Pb and Zn values for the same lot on the same assay basis. The published commercial threshold is Pb + Zn >40%. If the basis is unclear, explain it first; do not combine results from different reports.
Does a combined result of exactly 40% qualify?
The threshold is strictly above 40%; exactly 40% does not exceed it. Provide the original assay values and basis so the actual lot can be discussed accurately.
Can I submit both oxide and sulphide mixed concentrates?
Yes, both can be submitted for evaluation. Describe the material type, processing, composition, moisture and available impurity results. Meeting the combined grade threshold does not confirm the other acceptance conditions.
Is silver or another associated metal always payable?
Include any available Ag or other associated-metal results. Whether and how a metal is payable, and the assay basis used, are negotiated against the actual results and contract terms.
What are the minimum quantity, payment and title-transfer terms?
Start with the actual available quantity and supply plan. Quantity, price, testing, payment and title-transfer milestones are agreed per lot and contract; this page makes no uniform commitment.
OFFER CARGO TO RTV
Discuss procurement using actual lot information
Start with Pb, Zn, assay basis, location and current quantity. Quantity, price, testing, payment and title-transfer milestones are agreed per lot and contract.