Cupellation (fire assay) furnaces (CF) for the precious metals market

• The assay of gold alloys by cupellation is the standard method used by the United Kingdom Assay Offices and a reference laid down by the International Hallmarking Convention
• Comply with ISO 11426 : 1999
• The Carbolite range of fire assay and cupellation furnaces has an international reputation for close temperature uniformity, low heat loss and maximum fume control
• Maximum operating temperature 1200°C
• One bench mounted and three floor standing models, with capacities ranging from 15 x cupel #8 up to 90 x cupel #6
• Silicon carbide heating elements are mounted above and below the work chamber, providing even heating of the cupels
• Fumes are extracted through an insulated exhaust duct and a removable container, situated below the chimney, collects any condensed lead
• Incoming air, which is controlled by an adjustable valve at the rear of the furnace, is preheated by passing over the lower elements prior to entering the chamber - ensuring rapid heat transfer and even temperature distribution
• The work chamber, roof and hearth are lined with silicon carbide tiles which will withstand the corrosive lead fumes emitted during the process
• Click for specification details