Cupellation Furnaces is a high temperature fire assay furnace, max temperature can up to 1300 °C. Cupellation is a process to separate precious metals, such as gold or silver, from alloys with base metals. During the process, aggressive gases that attack the insulation and the heating are released. Cupellation furnaces are especially designed for the very demanding process requirements.
The cupel furnace chamber consists of a ceramic muffle, which offers very good protection for the heating elements and insulation against the vapors. A special fresh-air and exhaust air system guides exhaust gases directly into the exhaust hood of the cupellation furnace. At the same time, fresh air is lead into the furnace atmosphere. The integrated exhaust hood on top of the furnace and above the door is the interface to the customer’s required exhaust air system. The design is very-maintenance friendly; all wear and tear parts on the furnace, which are f.i. the ceramic muffle and the heating elements, can be replaced easily.
Cupellation furnaces are designed especially for cupellation. Due of its high chamber design, the fire assay furnace can also be used for crucible melting.
STANDARD FEATURES of fire assay furnace
1300°C maximum operating temperature
Designed for testing using the cupellation method to ISO the standard test method used by the UK Assay Office, a reference quantitative assay method by the International Hallmark Convention
The airflow, controlled by an adjustable valve, is preheated before entering the work chamber
Silicon carbide elements mounted above and below the chamber provide even heating of cupels, have good resistance to thermal shock & offer extended working life at high temperatures
Silicon carbide lined roof and hearth protect the heating elements and resist the corrosive fumes emitted during the cupellation process
Fumes are extracted through an insulated exhaust duct, with a removable container to collect condensed lead
Up & away counterbalanced vertically opening door fitted with observation hole
Element over-temperature protection controller
Fitted with 7 days, 24 hours time-switch.
Cupellation Furnaces is a high temperature fire assay furnace, max temperature can up to 1300 °C. Cupellation is a process to separate precious metals, such as gold or silver, from alloys with base metals. During the process, aggressive gases that attack the insulation and the heating are released. Cupellation furnaces are especially designed for the very demanding process requirements.
The cupel furnace chamber consists of a ceramic muffle, which offers very good protection for the heating elements and insulation against the vapors. A special fresh-air and exhaust air system guides exhaust gases directly into the exhaust hood of the cupellation furnace. At the same time, fresh air is lead into the furnace atmosphere. The integrated exhaust hood on top of the furnace and above the door is the interface to the customer’s required exhaust air system. The design is very-maintenance friendly; all wear and tear parts on the furnace, which are f.i. the ceramic muffle and the heating elements, can be replaced easily.
Cupellation furnaces are designed especially for cupellation. Due of its high chamber design, the fire assay furnace can also be used for crucible melting.
STANDARD FEATURES of fire assay furnace
1300°C maximum operating temperature
Designed for testing using the cupellation method to ISO the standard test method used by the UK Assay Office, a reference quantitative assay method by the International Hallmark Convention
The airflow, controlled by an adjustable valve, is preheated before entering the work chamber
Silicon carbide elements mounted above and below the chamber provide even heating of cupels, have good resistance to thermal shock & offer extended working life at high temperatures
Silicon carbide lined roof and hearth protect the heating elements and resist the corrosive fumes emitted during the cupellation process
Fumes are extracted through an insulated exhaust duct, with a removable container to collect condensed lead
Up & away counterbalanced vertically opening door fitted with observation hole
Element over-temperature protection controller
Fitted with 7 days, 24 hours time-switch.
