Evidence based speculation, page-42

From Wiki
"To produce a ton of steel in an electric arc furnace requires approximately 400 kilowatt-hours per short ton or about 440 kWh per metric tonne; the theoretical minimum amount of energy required to melt a tonne of scrap steel is 300 kWh (melting point 1520 °C/2768 °F). Therefore, a 300-tonne, 300 MVA EAF will require approximately 132 MWh of energy to melt the steel, and a "power-on time" (the time that steel is being melted with an arc) of approximately 37 minutes. Electric arc steelmaking is only economical where there is plentiful electricity, with a well-developed electrical grid. In many locations, mills operate during off-peak hours when utilities have surplus power generating capacity and the price of electricity is less."
I used a figure of .11kwh to melt 1kg of Cu which would be 1520/1085 = 40% more for Iron which is likely similar to magnetite .
.11kwh * 140% = .154kwh for steel of 1kg
.154kwh * 1000 = 154kwh for a tonne of steel they give a figure of 300kWh so my calculation was only half what it should have been in real life .