Fuel-fired furnaces with burner systems that include heat recovery via a recuperator provide for optimum energy efficiency in connection with a top melt quality. The combustion air for the burner is pre-heated with the hot exhaust gases from the furnace via heat exchanger. The system results in savings of up to 25 % compared to conventional fuel-fired furnaces with side exhaust gas discharge.
Depending on the utilisation the relatively higher acquisition costs pay off already after a short period of time.
- Burner systems with a recuperator system save around 25 % of the power compared to furnaces with a side exhaust gas discharge
- High melt quality due to low burn-off and reduced hydrogen absorption in the melt
- Reduced power consumption by up to 50 % during holding with a closed swing lid
- Operator exposed to less heat in the area above the crucible
- Best melt quality if a bath control for a precise temperature control is used
- Lower melting performance than furnaces with exhaust gas discharge over the crucible edge
- Power consumption during melting around 20-25 % higher than furnaces with exhaust gas discharge over the crucible edge