Note: Melting aluminum in a graphite crucible for casting

Objective:

To heat a graphite crucible to 1,292 °F (700 °C) to melt aluminum to liquid form for a casting application.

End Product:

Equipment:

Ambrell EKOHEAT 50 kW induction power supply with a workhead and coil specifically designed for this application.

Materials:

9.8 in (250 mm) OD, 22.4 in (570 mm) long, 0.7 in (17.5 mm) thick
Graphite crucible, approx. 92.5 lb. (42 kg) of aluminum.

Temperature:

1,292 °F (700 °C)

Frequency:

8.3 kHz

Testing:

A ten-turn helical coil was used to heat the graphite crucible to 1,292 °F (700 °C) for 25 minutes to melt the aluminum to liquid form. Once the aluminum was melted it was then cast. No stirring was involved, molten sunk to bottom of crucible and aided in the melting process.

Benefits:

  • Hands-free heating that involves no operator skill for manufacturing.

  • Repeatable, dependable results.

  • Rapid heating.

  • More efficient and cost effective than a gas furnace; does not heat up the manufacturing area.

  • Quicker process time which increases production/throughput.

Melting aluminum in a graphite crucible for casting

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