Fire Assay Furnaces

cupellation furnace
fire assay furnace working view
assay furnace back view
cupellation furnace circuit board
fire assay furnace circuit board
cupellation furnace
fire assay furnace working view
assay furnace back view
cupellation furnace circuit board
fire assay furnace circuit board

Cupellation Furnace

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.

Product Details

Supply a variety of cupellation furnaces for fire assay laboratories

Qingdao Decent Group cupellation furnace is a kind of fire assay equipment used to detect the content of gold, silver and precious metals, also known as muffle furnace. As professional laboratory equipment, the industrial standard furnace chamber can be loaded with 50 or 100 cupels. It significantly improves the efficiency of laboratory work and reduces the frequency of manual operations.

The structure of the fire assay cupellation furnace is made of carbon steel as a whole, which is strong and durable. Silicon carbon heating elements, K-type thermocouple and Omron temperature controller make the furnace temperature can be adjusted precisely, and the furnace temperature is uniform and stable. The maximum temperature of the furnace can reach 1200 ℃. These conditions provide reliable results for the operation of absorbing lead buttons to obtain gold silver alloys in the cupellation process.

Key Advantage:
• Industrial standard, take 50/100 cupels at one time
• Easy to maintain and operate
• Heat up fast, furnace chamber temperature uniform and stable
• Simple replacement of consumables
• Electronic component leakage protection
• Pneumatic door vertical lifting by foot pedal

Equipment Structure:
• 2mm carbon steel frame is integrally formed, and the outer surface is electrostatically painted
• The door panel is attached with aluminum silicate refractory cotton, and the chamber is made of high-quality thermal insulation refractory bricks and refractory thermal insulation fiber cotton
• Using high-quality silicon carbide element heating, long life
• Independent furnace muffle and plate, easy to replace
• Electric heating method, an air compressor is required

Temperature Control:
• Type K  thermocouple
• Electronic automatic temperature control, up to 1200°C
• High temperature alarm output
• Fitted with over temperature controller



[ Various Options ]

• Optional equipment such as fire assay tools, manual/electric crucible loader, etc. can be used to form integrated systems of multi-pour loading, unloading and cupellation.
• Optional laboratory dust removal system and acid fume scrubber
• The 50 place cupellation furnace can be connected with a 25 place laboratory crucible fusion furnace
• Safety goggles, aluminized heat-insulating protective clothing, and aluminized protective gloves must be worn during the whole process of the cupellation
• Fire assay cupellation furnace can be customized according to customer needs

[ How To Cupellation ]

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.

[ Product Video ]

[ 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

937x1385x1915 / door 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

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