Our annealing furnaces are made by a tubular frame and panels with Louvres for air exchange. Tubular system makes general maintenance interventions easier. Resistence and special refractory insulating panels, with high thermal features, make up heating muffles. Special stainless steel heating chambers can resist strong temperature changes. Nozzles inside the chamber let protection gas in. A burner placed in front of the chamber avoids entrance of oxygen and improves de-oxidation. A stainless steel shovel lies inside. When metal is annealed, you just push the pale till the bottom of cooling chamber and throw it in the water tub for instantaneous cooling (or let it Lie in the cooling chamber to cool, taking some time). Treated material is recovered from the tub manually or by a pneumatic piston
Optional :
- Hydrogen Nitrogen Mixer
- Ammonia filter
- Ammonia pressare regulator
- Nitrogen pressare regulator
- Hydrogen pressare regulator
- Ammonia dissociator
| Model | aD 010 | aD 020 | aD 030 | aD 040 | aD 050 | |
| Size | mm kg |
923 x 1800 x1380 290 (350 with diss.) |
1094 x 2200 x1560 420 (480 with diss.) |
1094 x 2200 x1560 440 (500 with diss.) |
1480 x 2620 x1890 663 (720 with diss.) |
1480 x 2800 x1950 730 (790 with diss.) |
| Voltage | V | |||||
| Power | kw | 8,0 10.5 (With diss.) |
10,5 13.0 (With diss.) |
12,0 14.5 (With diss.) |
18,0 20.5 (With diss.) |
24,0 26.5 (With diss.) |
| T Max | C° | |||||
| Chamber Dimension | mm | 200 x110 x 875 | 250 x 150 x1185 | 290 x 150 x1185 | 450 x 150 x 1185 | 450 x210 x 1185 |
| Length Heading Zone | rilril | 400 | 720 | 720 | 720 | 720 |
| n°zone | 1 | 1 | 1 | 2 | 2 | |
| Cooling Chamber | mr11 | 475 | 559 | 559 | 684 | 684 |
| Reducing atmosphere | Ilmin | N+3H 15-20 |
N+3H 16-20 |
N+3H 17-20 |
N+3H 18-20 |
N+3H 19-20 |
| Accessories Optional | |||||
| NH3 Dissociator | Only In Order Face 60 kg -2.5 kw |
||||
| N+3H Mixer | 0 | 0 | 0 | 0 | 0 |
| Pneumatic unloading | – | 0 | 0 | 0 | 0 |
Frequently Asked Questions
The OPDEL FR Series Annealing Furnace is a static-type annealing furnace designed for gold, silver, and other precious metals. It features a digital control panel, loading tray, and controlled atmosphere for precise heat treatment.
The FR Series is ideal for gold, silver, copper, platinum, and other non-ferrous metals used in jewelry manufacturing, refining, and metal processing.
The FR Series operates at high temperatures suitable for annealing applications, with models designed to deliver consistent and uniform heat treatment for precious metals.
After annealing, the material can be immediately quenched in the integrated water tank for rapid cooling or allowed to cool naturally in the cooling chamber, depending on the required metallurgical properties.
The furnace uses a Nitrogen-Hydrogen (N₂ + H₂) reducing atmosphere along with a front burner that minimizes oxygen entry, producing clean, bright, and oxidation-free metal surfaces.
Key features include:
- Digital temperature control
- Static-type heating chamber
- Stainless steel loading tray
- Heavy-duty tubular frame construction
- High-performance refractory insulation
- Stainless steel heating chamber
- Integrated cooling chamber
- Energy-efficient operation
Optional accessories include:
- Hydrogen-Nitrogen Mixer
- NH₃ (Ammonia) Dissociator
- Ammonia Filter
- Hydrogen Pressure Regulator
- Nitrogen Pressure Regulator
- Ammonia Pressure Regulator
- Pneumatic Unloading System
The FR Series is widely used in jewelry manufacturing, precious metal refining, coin production, and industrial metal processing, where precise and reliable annealing is required.