Ecological and Economical Arc Furnace

Objective
Opportunities enabled
Country
Japan

Because the preheating shaft and melting chamber are directly and rigidly connected, the scraps are continually present from the steel to preheating areas. This enables high-temperature preheating of the scraps, resulting in a significant reduction of power consumption.
The melting chamber is sealed off from outside air, to prevent the excess air inlet. It prevents over oxidation of scrap under high temperature preheating. As this equipment keeps always flat bath operation, electrode consumption is significantly improved.
Dioxins are decomposed through an exhaust gas combustion chamber and rapid quench chamber in the exhaust gas duct system. Not only dioxins but also a volatile material that causes foul odors and white smoke will be decomposed and the dispersal of them are also prevented. The furnace prevents diluting of exhaust gasses. Therefore, the CO within the exhaust gas can be used as fuel, reducing the amount of fuel gas consumed. Flat bath operation dramatically reduces noise during operation.

Organisation providing the technology
The Japan Iron and Steel Federation
Benefits
  • Electricity savings: 150 kWh/t-steel
  • CO2 Reduction: 135 kg-CO2/t-steel
Co-benefits
  • Low electrode consumption: 0.8-1.0 kg/t-steel
  • Productivity: 40% increace
  • Yield: 1.5% increace
  • DXN: <0.1 ng-TEQ/Nm3
  • Dust: 40% decreace
  • Noise: 15dB decreace
  • Flicker: 40% decreace
  • No Odor or White Smoke
Differentiators

n/a

Investments required

n/a

Timeframe

n/a

Countries where implemented
Thailand
Contact

The Japan Iron and Steel Federation

Tel: +81-3-3669-4837

Email: [email protected]