PRODUCTS
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.
Supply a variety of cupellation furnaces for fire assay laboratories
Qingdao Decent Group range of cupellation furnaces for fire assay laboratories. These furnaces, also known as muffle furnaces, accurately detect gold, silver, and precious metal content. They significantly improve laboratory efficiency by accommodating 50 or 100 cupels, reducing manual operations.
Our cupellation furnaces feature a robust carbon steel structure, precise temperature control with silicon carbon heating elements, a K-type thermocouple, and an Omron temperature controller. The furnace reaches temperatures up to 1200°C, ensuring reliable results during the cupellation process to obtain gold-silver alloys.
Advantages of Cupellation Furnaces
- Industrial standard with the capacity for 50/100 cupels
- Easy maintenance and operation
- Fast heat-up time, uniform and stable furnace temperature
- Simple consumables replacement
- Electronic component leakage protection
- Pneumatic door with vertical lifting using a foot pedal
Equipment Structure
- Sturdy 2mm carbon steel frame with electrostatic paint finish
- Aluminum silicate refractory cotton on the door panel, high-quality thermal insulation refractory bricks, and thermal insulation fiber cotton in the chamber
- Long-lasting silicon carbide element heating
- Independent furnace muffle and plate for easy replacement
- Electric heating method with the requirement of an air compressor
Temperature Control
- Type K thermocouple
- Electronic automatic temperature control, up to 1200°C
- High-temperature alarm output
- Equipped with an over-temperature controller
Various Options
- Integration with optional equipment such as fire assay tools, manual/electric crucible loaders, forming multi-pour loading and cupellation systems
- Optional laboratory dust removal system and acid fume scrubber
- The connection between 50-place cupellation furnace and 25-place laboratory crucible fusion furnace
- Safety gear, including goggles, aluminized heat-insulating protective clothing, and aluminized protective gloves, must be worn throughout the cupellation process
- Customization is available based on customer requirements
How To Cupellation
Cupellation is a crucial step in separating precious metals from lead alloys. Cupels are preheated in the furnace at 800-900°C to remove volatile substances. The lead button is then placed into the preheated cupels, melted, and oxidized into lead oxide. The lead oxide permeates into the cupels, removing lead and base metals. Gold, silver, and precious metals remain in the cupels as gold and silver particles.
Product Video
Cupellation Furnaces Technical Parameters
| Model No. | Muffle No. | Muffle Size (mm) | Crucible Qty & Size | Heating Element | Transformer | Air Compressor Recommended Air Pressure (MPa) | Rated Temperature | Power (KW) | Dimension (mm) |
| DE-50CF | No.4 | 300x480x246 | 50x6A/7A/7AS | 12pcs, Silicon Carbide Element | 3ph, 20KVA Multi-tap | 0.4-0.5 | 1200℃ | 11-20 | 937x1170x1675 door closed 937x1385x1915door open 1200x1350x2000 packing |
| DE-100CF | No.5 | 535x610x350 | 100X6A/7A/7AS | 12pcs, Silicon Carbide Element | 3ph, 30KVA Multi-tap | 0.4-0.5 | 1200℃ | 16-25 | 1260x1370x1690 door closed 1260x1390x1960 door open 1500x1500x2000 packing |
| DE-100CF-1 | No.5 | 535x610x350 | 100X6A/7A/7AS | 12pcs, Silicon Carbide or Silicon Molybdenum Rod | 3ph, 30KVA Multi-tap | 0.4-0.5 | 1500℃ | 24-36 | 1260x1370x1690 / door closed 1260x1390x1960 door open 1500x1500x2000 packing |
