Saving energy is of key importance in the energy-intensive melting process. Making use of waste heat is one of the ways to save money.
Melting furnaces, such as that shown in Figure 1, make targeted use of the waste heat from the melting process in order to preheat the material to be melted. For this purpose, they have a special shaft geometry well-known under the EtaMax brand. An adapted burner technology combines the melting phases of preheating, heating and liquefying the aluminum.