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A comment on A new way to make steel could cut 5% of CO2 emissions at a stroke. Parent comment
The way I understand it, is that when mined they get iron-oxide, Fe(2)O(3), or Fe(3)O(4), so there is no carbon present.
They use the coke to make carbon monoxide (CO). And this process removes the oxide and adds carbon to iron to create pig iron.
From there it will be further processed to create different steels, alloys and iron products.
Wikipedia (https://en.wikipedia.org/wiki/Iron_ore) under the smelting paragraph describes the oxide removal process.
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The way I understand it, is that when mined they get iron-oxide, Fe(2)O(3), or Fe(3)O(4), so there is no carbon present.
They use the coke to make carbon monoxide (CO). And this process removes the oxide and adds carbon to iron to create pig iron.
From there it will be further processed to create different steels, alloys and iron products.
Wikipedia (https://en.wikipedia.org/wiki/Iron_ore) under the smelting paragraph describes the oxide removal process.