These furnaces are ideal to melt precious metals. All ITALIMPIANTI ORAFI induction melting furnaces are fitted with static frequency converters.

A high efficiency of the electrical output that drastically reduces electricity consumption while maintaining the production rate thanks to frequency conversion system we have used.

The modular construction of the electric circuit board greatly simplifies maintenance operations and guarantees high reliability even in the most demanding working conditions.

The highest technical standards used to design the inductors along with the modular construction and the use of only high quality materials guarantee maximum production even in the worst conditions.

Main Advantages of our FIM/NT Melting Units

  • Absolute alloy homogeneity guaranteed by the medium frequency converter
  • Reduction of losses due to uniform temperature distribution in the molten material. This avoids the ‘skin effect’ typical of high frequency converters
  • Better malleability of the alloys allowing for considerable section reductions without annealing
  • Possibility to use different types of crucibles including graphite, clay-graphite, silicon carbide, zirconia etc.
  • Automatic temperature control by immersion thermocouple or optical pyrometer
  • Automatic power control regardless of quantity or type of metal
  • Computerised alarm diagnostics available in four languages. Alarm messages appear on the display along with trouble-shooting guidelines.
  • Automatic turn-off function for the furnace and cooling plant if not used for a certain amount of time (useful at the end of the working day)
  • Pouring can be done by manual extraction of the crucible, tilting by handwheel or hydraulic tilting
  • A closed cycle deionization system for cooling water is available as a standard feature on larger furnaces. This system greatly reduces maintenance operations on these plants.


Power supply Three-phase Three-phase Three-phase Three-phase
Absorbed power 5.5 kW 7 kW 10 kW 12 kW
Power output 5.1 kW 6.5 kW 9.5 kW 11.4 kW
Useful capacity - graphite crucible (kg Au 18 kt) 4,5 6.5 10 13
Useful capacity - silicon carbide crucible (kg Au 18 kt) 4 - 10 -
Melting time at max load (minutes) from cold 15 15 15 15
Temperature measurement T/O T/O T/O T/O
Required cooling power (frig/h) 1700 2500 3800 4500
Chiller for 8 hours working FRIGO 10 FRIGO 15 FRIGO 15 FRIGO 20
Minimum flow rate @25 °C (l/min) 6 15 20 20
Overall Dimensions (mm) 485x510x915 485x510x915 485x510x915 485x510x915
Weight 190 Kg 190 Kg 216 Kg 216 Kg





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