The skelner furnace operates with a high-velocity burner system that fires into the melting chamber, creating a vortex of hot gases for intense heat transfer to the metal charge. The charge material is loaded through the charging door and exposed to the high-temperature combustion gases. As the metal melts, it flows into the lower holding section where it is maintained at pouring temperature. The recuperator system captures exhaust gas heat to preheat incoming combustion air, significantly improving thermal efficiency. The separation of melting and holding zones allows fresh charge to be melted while clean metal is drawn from the holding section, enabling semi-continuous operation.