Looking into those calculations, I see the current average energy used to make 1 kg of steel is about 10 thousand BTU [1] - about 3 kWh. 75% is consumed in blas

Looking into those calculations, I see the current average energy used to make 1 kg of steel is about 10 thousand BTU [1] - about 3 kWh. 75% is consumed in blast furnace and "About 50% of an integrated facility’s energy input comes from coal, 35% from electricity, 5% from natural gas and 5% from other gasses [2]" Your estimate of 2kWh per kilo would look very promising for this process. Also the comparison of electrical price, with the price for raw coal surely begs some adjustment. [1] https://www.quora.com/How-much-energy-does-it-take-to-produce-steel https://www.quora.com/How-much-energy-does-it-take-to-produc... [2] https://www.worldsteel.org/en/dam/jcr:f07b864c-908e-4229-9f92-669f1c3abf4c/fact_energy_2016.pdf https://www.worldsteel.org/en/dam/jcr:f07b864c-908e-4229-9f9...