Carbolite Precious Metals Furnaces

Crucible furnaces for the previous metals market (SCF)

• Specifically designed for the smelting of precious metals
• Maximum operating temperature 1400°C
• Each furnace has twin chamber construction
• The SCF4 and SCF8 models have the appropriate number of apertures pre-cut to hold the crucibles in position
• The SCF 24 and SCF 48 models offer the same size chambers, but there are no apertures, allowing free selection of crucible size and quantity
• Crucible capacity: SCF 4/SCF 8 models - 120mm x 180mm (maximum outer diameter x height) SCF 24/SCF 48 models - 79 x 97mm (maximum outer diameter x height)
• The chamber is ventilated by a 50mm flue fitted in each hinged lid, which pivots on parallel links, keeping the hot face insulation away from the operator
• Silicon carbide elements are mounted horizontally behind the tiles which are situated around the work chamber
• Click for specification details
  

Cupellation (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
• The Carbolite range of 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

Gold melting crucible furnace (SCF1) for the precious metals market

• Single pot melter for precious metals
• Maximum operating temperature : 1400°C
• Maximum continuous operating temperature : 1350°C
• Heated by silicon carbide heating elements on all four sides of the chamber
• Chamber dimensions : 440 (h) x 285 (w) x 285mm (d)
• Click for specification details