Isothermal Hot Pressing of Skimmed Aluminium Dross: Influence of the Main Processing Parameters on In-House Molten-Metal Recovery

The isothermal hot pressing (IHP) of skimmed aluminium dross, considered in this study, was performed under laboratory conditions using a cylindrical pressing model made from high-temperature stainless steel. The pressing model was inserted into an electrical furnace with a protective argon atmosphere. The temperature of the pressing was within the interval 650–900 °C, while the applied pressure varied between 5 and 50 bars. The laboratory results showed that when using IHP it is possible to reduce the remaining aluminium content in “pressed dross skulls” below 10%.