KNOWLEDGE ARTICLE
A fluorspar certificate of analysis should be easy to read and should tell a buyer whether the material fits the plant. CaF2 matters, but so do the impurity fields and moisture line.
A fluorspar COA should identify the lot or shipment, report the chemistry that affects the buyer's process, and make the inspection basis clear enough to compare with the signed specification.
Do not read the CaF2 line in isolation. A shipment with an acceptable CaF2 number can still be poor value if moisture, silica, carbonate, size, or sampling basis does not match the plant requirement.
The table below is an illustrative review format, not a substitute for a real laboratory report. Use it to check whether a supplier COA gives enough information for procurement and plant teams to make the same decision.
| COA field | Example format | Buyer check |
|---|---|---|
| Lot or batch ID | Shipment lot, bag lot, or production batch reference | Must match packing list, invoice, and inspection record. |
| CaF2 | Percent by weight, preferably with basis stated | Compare with contracted grade and clarify dry or as-received basis. |
| SiO2 | Percent by weight | Important for acid-grade and process compatibility checks. |
| CaCO3 | Percent by weight | Can affect acid consumption and downstream process behavior. |
| Moisture | Percent by weight | Check usable material, freight economics, and handling risk. |
| Particle size | Mesh, mm range, or buyer-agreed sizing | Confirm feeding, dust, screening, and furnace charging fit. |
| Sampling basis | Lot sample, composite sample, third-party sample, or supplier lab sample | Clarify representativeness before using the COA for acceptance. |
Final acceptance should follow the signed specification, agreed sampling method, and contract inspection terms.
Before accepting a COA as commercial proof, connect it to the shipment and the process requirement.
These mistakes create disputes because the buyer and supplier are not evaluating the same basis.
The best COA is the one the buyer can read, compare, and use in procurement without guesswork.
It depends on the buyer process, but CaF2, moisture, and the impurity limits are usually the first checks.
Yes. The report should map to the exact lot or shipment being purchased.
