The GWB series is a medium-frequency holding and heat-insulation furnace. It keeps molten metal at temperature for pouring, continuous casting, preheating and duplex operation beside a melting furnace.
Catalog holding capacities run from about 3 ton to 50 ton. Power, frequency and cooling water are confirmed against the metal temperature and the holding time before a furnace is released for design.
Technical Data
| Model | Rated capacity (t) | Rated power (kW) | Incoming line voltage (V) | Holding temperature (°C) | Heat-up rate (t/h) | Output frequency (Hz) | Furnace body voltage (V) | Unit power use (kWh/t) | Cooling water (t/h) |
|---|---|---|---|---|---|---|---|---|---|
| GWB3-300/0.7 | 3 | 300 | 380 | 1580 | 7.5 | 250–500 | 1500 | 49 | 9 |
| GWB5-500/0.6 | 5 | 500 | 380 | 1580 | 12.8 | 250–500 | 1500 | 44 | 12 |
| GWB8-800/0.5 | 8 | 800 | 660 | 1580 | 17.6 | 250–500 | 2400 | 43 | 15 |
| GWB10-1000/0.5 | 10 | 1000 | 660 | 1580 | 24.5 | 250–500 | 2400 | 42 | 1 |
| GWB12-1200/0.5 | 12 | 1200 | 660 | 1580 | 30 | 250–500 | 2400 | 40 | 25 |
| GWB15-1500/0.25 | 15 | 1500 | 660 | 1580 | 36 | 150–250 | 2400 | 40 | 28 |
| GWB20-2000/0.25 | 20 | 2000 | 660 | 1580 | 47 | 150–250 | 2400 | 40 | 36 |
| GWB30-3000/0.15 | 30 | 3000 | 1000 | 1580 | 86 | 150–250 | 3200 | 40 | 55 |
| GWB40-4000/0.15 | 40 | 4000 | 1000 | 1580 | 86 | 150–250 | 3200 | 38 | 70 |
| GWB50-5000/0.15 | 50 | 5000 | 1000 | 1580 | 108 | 150–250 | 3200 | 38 | 80 |
| US standard | Applies to |
|---|---|
| NFPA 86 | Standard for Ovens and Furnaces — furnace safety for US plants |
| NFPA 70 (NEC) | National Electrical Code — incoming power and grounding |
| IEEE 519 | Harmonic limits at the plant point of common coupling |
| UL 508A | Industrial control panels on the power supply |
| ASTM A876 | Grain-oriented electrical steel for the magnetic yoke |
| ASTM B75 | Seamless copper tube for the induction coil |
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
- Holding, temperature maintaining and preheating
- Used beside a melting furnace in one-to-two and duplex lines
- Hydraulic or gearbox tilting
- Lower power than a melting furnace of the same bath size
- Catalog range about 3 t to 50 t
Construction
- Steel-frame body with water-cooled copper coil and magnetic yokes.
- Lining and coil cooling are arranged for long holding, not only for a fast melt.
Working principle
After the melting furnace finishes a heat, metal is transferred to the GWB furnace. A smaller power supply holds temperature while the melting furnace starts the next charge.
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.