Gas Propane Cupellation Furnace

Modular mid-sized propane-fired kiln designed specifically for cupellation processes after fire assay.
Used to separate precious metals from lead prill.
Not suitable for melting or smelting operations.

Kit Contents :

• Kiln with clay cupel pedestal
• Cupels (#12)
• Bent tongs (8″)
• Fire assay book
• Liner maintenance kit
• Instruction manual

Working Principle :

• A lead prill obtained from fire assay is placed in a cupel
• Heating causes lead to oxidize into litharge, which is absorbed by the cupel
• Remaining material forms a bead of precious metal

Operation :

• Place kiln on fireproof surface
• Insert and ignite propane torches
• Preheat kiln and cupel
• Place lead prill in cupel and heat
• Remove lid to create oxidizing environment
• Continue heating until lead is absorbed
• Allow bead to form and cool

Additional Information

• Not intended for melting or smelting
• Requires propane torches (not included)

• Cupellation after fire assay
• Precious metal recovery from lead prill

Height :

• 6″

Diameter :

• 6″

Chamber size :

• 3.5″ diameter × 3.25″ height

Weight :

• 2 lbs 12 oz

Temperature rating :

• Up to 2300°F

Material :

• Stainless steel exterior with alumina refractory interior

Fuel type :

• Propane

Heating requirement :

• 2 × 6000 BTU torches (not included)

Safety :

• High temperature operation (>2200°F)
• Not suitable for children
• Use in controlled environment with precautions
• Improper use voids warranty

• Modular design
• Chamfered chamber for cupel placement
• High temperature refractory interior
• Compact and portable
• Designed specifically for cupellation
• Durable stainless steel construction