Waste to Energy Plants

Ash melting furnaces (electric resistance type)

JFE electric resistance type ash melting furnace

JFE’s Electric Resistance Ash Melting Furnace melts bottom/ fly ash at temperatures of 1,500 degree C, and transforms it into slag and metal. The electric resistance heat generated consequently melts ash under stable controlled conditions. The slag and metal can be used or recycled. The significant volume reduction contributes to prolongation of final disposal sites.

1) Excellent slag quality:
Slag and metal are gravity-separated and discharged through the outlets on the bottom of the furnace at different heights, resulting in excellent slag quality.

2) Reduction in hazardous gas:
Generation of hazardous gas is minimized since the gas flows out of the melting furnace is in a negative pressure.

3) Resource recovery:
Most of the heavy metals contained in the ash are trapped in fly ash and can be recycled.

Reference Plants

Nasushiobara Clean Center
Capacity (ash melting)
14 tons/day (14 tons/day × 1 line)
May 2009
Naha-Haebaru Clean Center
Capacity (ash melting)
52 tons/day (26 tons/day × 2 lines)
March 2006
Kanazawa Plant, Resource Circulation Bureau, Yokohama City
Capacity (ash melting)
60 tons/day (60 tons/day × 1 line)
March 2001

Structural drawing