How to melt Steel with Electricity? The question boils down to concentrating heat. You can force heat into a crucible with heat from resistive coils. Or you can zap the right material in a microwave and it will heat up. (Examples have found use graphite, magnetite, and silcon carbonate). Or maybe a sort of induction furnace could work using a resistive crucible. Are any of these methods more efficent than the others? What are some standard industrial methods?