Thyssenkrupp may have just cleared the path to bulk green steelmaking
Comment of the Day

October 06 2022

Commentary by Eoin Treacy

Thyssenkrupp may have just cleared the path to bulk green steelmaking

This article from newatlas may be of interest to subscribers. Here is a section: 

German steel giant Thyssenkrupp is investing US$1.9 billion in a hydrogen-powered direct-reduction system that can create high-quality steel without needing the rare, high-grade iron ore required by most green steel processes. This could open the floodgates.

But the technology to make green steel is well understood and already in use. You stop using fossil-fired blast furnaces to release the oxygen from iron ore, and you stop using baked coal, or coke, as a reductant to add the critical small percentage of carbon to your iron. Instead, you use green hydrogen in a direct reduction process, both as your reductant and to power an electric arc furnace to supply the heat. Instead of tons of carbon dioxide, this process emits water.

Eoin Treacy's view

Electric arc furnaces require scrap steel to function so there is a heavy reliance on recycled supply. Using hydrogen to make the process more efficient and to avoid buying costly carbon credits is a bonus if it can be achieved effectively.

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