We supply high performance Ashes Assay Crucibles for the determination of Precious Metals (Gold, Silver, and Platinum Group Metals) using the Fire Assay / Cupellation method (aka “Docimasy”).
Their application is to “flux-melt” a sample under high temperature and reducing conditions. It is possible to Fire Assay the following kinds of samples:
● Gold mines and Geological Labs Exploration ores from drill cores / trenching / grabbing .
● Mineral concentrates and electrolytic slimes. Copper smelters are the most common processors of mineral concentrates.
● Scraps & Residues (ashes) from sweeps / filings / lemel / catalysts . Precious metal refineries recylce these materals.
They are specially suitable to work with scraps & residues, but also with mineral concentrates. In addition, our Ashes Assay Crucible also provide excellent resistence against flux and minimize absorption losses. Furthermore, they are made of silico aluminous refractory material which confers them excellent resistance against the high temperatures present in the oven (up to 1250ºC)
Finally, our ashes assay crucibles have a conical inner shape that favours the oxygenation of the crucible and that optimises the separation of the slag and lead phase.
We supply a whole range of ashes assay crucibles:
|Dimensions in mm:
Ø – Upper External
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