Hydrogen metallurgy in the steel industry will be the main scenario for large-scale hydrogen application in the future. Blast furnaces can use hydrogen as a reducing agent to replace the traditional carbon-based reduction process, thereby reducing greenhouse gas emissions. In the process of hydrogen metallurgy, establishment of an efficient and reliable hydrogen storage industry chain is the key to success. A brief review on hydrogen metallurgy and worldwide development of hydrogen storage and transportation tech especially via solid-metal hydride is given in this paper. Combined with the demand on hydrogen storage and transportation for hydrogen metallurgy, a scheme for massive H2 usage in iron&steel plant via conceptional "gas-solid-gas phases" separate charge&discharge system by solid-metal hydride is proposed to reach a theoretically economic, safe, longdistance and scale-up industrial application. In the future, production and storage&transportation for massive H2-contained solid material for raw-material handling process in iron&steel or chemical plants will be realized by attainable engineering, which will propel revolutionary change in the upstream alloy industry and green H2-via-renewable industry.

solid hydrogen storage  /  massive materials  /  hydrogen metallurgy  /  industrial applications