The water-cooled copper induction coil is the working part of a medium-frequency furnace. It is wound to the crucible size, insulated for the furnace voltage, and cooled so the lining survives repeated heats.
Technical Data
| Item | Catalog value |
|---|---|
| Conductor | Rectangular copper tube, 99.9% copper |
| US material standard | ASTM B75 seamless copper tube |
| Insulation | Electrostatic spray, high-strength epoxy |
| Insulation withstand | Above 5000 V |
| Turn spacing after fixing | Error not above 2 mm |
| End cooling | Water-cooled turns at the top and bottom of the coil |
| Large coil shown | 60 t medium-frequency coil on the GW sheet |
| Shell on small furnaces | 50 kg–3000 kg aluminum-alloy shell on the same sheet |
| US standard | Applies to |
|---|---|
| ASTM B75 | Seamless copper tube, water-cooled coil |
| ASTM B152 | Copper sheet and strip where used on connections |
| NFPA 86 | Furnace water-circuit safety interlock |
Every figure in these tables is taken from the factory sheets in the product folder and is written in English. 1 metric ton = 1.102 US short tons. Power-supply ratings can still be negotiated to the customer requirement, as the sheet itself states. American standards are the US specifications normally requested with this equipment.
Key features
- Rectangular copper tube, catalog construction in 99.9% copper
- Electrostatic spray insulation, catalog withstand above 5,000 V
- Turn-spacing error held within about 2 mm after the coil is fixed
- Extra cooling turns at the top and bottom of the coil
- New coils and replacement coils for existing furnaces, including large 60 t class coils
Construction
- Copper tube, turn insulation, stainless supports, cooling-water circuit and power terminals.
- The coil is built to the furnace drawing: diameter, height, turns, tube size and terminal position.
Working principle
Coil current produces the magnetic field that melts the charge. Cooling water takes away the copper loss so the tube and the lining stay within temperature.
Applications
Steel, cast iron, stainless steel, copper, aluminum, aluminum alloy, brass and other non-ferrous metals.
Complete system integration
This equipment sits in the same line as the power supply, the capacitor bank, the induction coil, the magnetic yoke, the furnace body and the cooling system. A quotation can cover one item or the full line.
Customization
Capacity, voltage, frequency, dimensions and connection layout can be made to the furnace design. Send the drawing or the duty data below.
Catalog sheets
Questions before a quotation
Can the rating be customized?
Yes. Capacity, voltage, frequency, tube size and connection layout follow the furnace drawing and the metal.
What do you need for a quotation?
Furnace capacity, metal, melting temperature, melting rate, working hours, input voltage, frequency if known, tilting method and cooling-water conditions. A drawing helps.
Do you supply a single machine or the complete system?
Both. A spare coil, yoke, capacitor or cooling tower can be quoted alone. A new foundry line is quoted as a complete system.
Which metals can be melted?
Steel, cast iron, stainless steel, copper, aluminum, aluminum alloy, brass and other non-ferrous metals. The lining and the frequency follow the alloy.
Will you confirm the catalog numbers before manufacture?
Yes. The sheets on this page are the factory catalog for selection. The quotation states the rating that will be built.