Decent - Fire Assay Cupellation Furnace

A Chinese manufacturer specializing in design and sale quality fire assay cupellation furnaces

Qingdao Decent Group Cupellation Furnace is a kind of fire assay equipment used to detect the content of precious metals, also known as muffle furnace. The heating element of the cupellation furnace adopts silicon carbide heaters, and the furnace adopts refractory materials with silicon carbide as the main element. The maximum temperature can reach 1200. PID temperature control system can realize temperature indication and precise regulation. The modular design of the cupellation furnace chamber is convenient for maintenance and replacement of parts.

• Easy to maintain and operate.
• Door panel for easy access to transformer.
• Compatible with “Multi-pour” loading / unloading system.
• Built to industry standards.
• Construction
• Cabinet is durable 2mm steel plate, lined with high quality refractory bricks and insulation.
• The furnace is mounted on a console fabricated from 2mm laser cut plate in blue enamel.
• Temperature Control
• Electronic, automatic control max. 1200°C,
• Type “K” thermocouple
• High temperature alarm output.
• Optional 7 days timer is available.
• Door Operation
• Counter balanced rising.

Cupellation is an important step to separate precious metals from lead in lead alloys. First, the cupels are preheated in the fire assay cupellation furnace at 800-900 ? to remove the organic matter, moisture, carbon dioxide and other volatile substances. Then put the lead button into the preheated cupels. After the lead button is melted in the cupellation furnace, the lead is oxidized into lead oxide and penetrates into the porous cupels. Thereby removing the lead and base metal from the lead button. Gold, silver and precious metals are not oxidized and kept in the cupels to form gold and silver particles.