JFE’s Electric Resistance Ash Melting Furnace melts incinerator bottom ash at high temperatures of up to 1,500°C, converting it into slag and metal that can be safely reused in various applications, thereby reducing the load on final disposal sites.
By applying AC voltage between the electrodes inside the furnace, the ash itself becomes a resistive body and generates electric resistance heat, resulting in stable and smooth melting. In addition, the furnace is equipped with outlets at different heights at the bottom of the furnace, so that slag and metal are discharged after being separated by specific gravity, resulting in slag of very high quality. In addition, the generation of toxic gases is suppressed by the reducing atmosphere inside the melting furnace. Therefore, most of the heavy metals contained in the ash are captured as molten fly ash and can be recovered and safely reused.
Reference Plants
Name
Nasushiobara Clean Center
Capacity (ash melting)
14 tons/day (14 tons/day × 1 line)
Completion
May 2009
Name
Naha-Haebaru Clean Center
Naha-Haebaru Clean Center
52 tons/day (26 tons/day × 2 lines)
Completion
March 2006
Name
Kanazawa Plant, Resource Circulation Bureau, Yokohama City
