[BurningPenguin]

Pretty sure those don't run on electricity.

[jacquesm]

Electrical aluminum smelters are pretty common. They consume an insane amount of power, 13 to 15 MWh / ton! (to produce aluminum from raw ore).

For foundries the picture is a bit better, for instance:

https://www.strikowestofen.com/aluminium-holding-furnaces

There are also gas fired ones and various special purpose furnaces (recycling, for instance).

[FirmwareBurner]

Energy isn't just electricity. Could be gas as well.