Abstract：Hydrogen metallurgy is a green and low-carbon smelting process, which is an effective way to achieve the transformation and upgrading of iron and steel industry and change the image of high carbon emissions. Hydrogen metallurgy can reduce CO2 emission by replacing traditional coke with pure hydrogen or hydrogen-rich gas in the production of direct reduction iron. The preparation of hydrogen-rich reducing gases is one of the keys to realize hydrogen metallurgy. The processes and catalysts of large-scale hydrogen production for hydrogen metallurgy are compared and analyzed, including hydrogen made from coke oven gas, natural gas, coals, and ammonia decomposition. The way of hydrogen production from renewable energy, including water electrolysis, is also discussed. Since the techniques for hydrogen metallurgy is increasingly mature, hydrogen metallurgy will become the focus of the upgrading and transformation of iron and steel industry in the future.
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2023, Vol. 33 
