Development status and application of hydrogen metallurgy technology
As an important economic support industry in China,the steel industry is also a major carbon emission industry.The application of hydrogen energy in the field of metallurgy is an environmentally friendly and efficient steel production technology,which is one of the important ways to achieve low-carbon development.Based on the comprehensive introduction of hydrogen rich blast furnace,hydrogen based direct reduction and hydrogen based smelting reduction technology,this paper analyzes the application of various technology in metallurgical industry,and systematically discusses the exploration and practice of each process.By comparing the advantages and disadvan-tages of each technology,the development trend of hydrogen metallurgy under the background of low carbon in China is analyzed.At present,the production of China's iron and steel industry is still dominated by long processes,and in order to realize the goal of 30%emission reduction by 2035,the hydrogen-rich blast furnace technology can be used as the preferred direction for the improvement of technology at this stage.However,the ability of hydrogen-rich blast furnace technology to achieve carbon emission reduction is relatively limited,the carbon emission reduction is about 10%-20%,which can not meet the goal of carbon neutrality in the future.Compared with the hydrogen-rich blast furnace technology,the carbon emission reduction of hydrogen-based direct iron reduction technology can reach more than 50%,so the hydrogen-based direct reduction technology can be used as the main route for future development.Hydrogen based smelting reduction also has a better carbon emission reduction effect,and the produc-tion of high-purity foundry pig iron can be used in the field of high-end castings.However,the current research is not enough,and it is still in the basic research stage,and there is still a big gap with large-scale industrial produc-tion.Hydrogen metallurgy is an important way for the low-carbon green development of the iron and steel industry.However,China started late and still faces problems such as weak basic research and high short-term costs.With the development of green hydrogen industry,green hydrogen metallurgy will be an important direction for the green development of the iron and steel industry in the future.
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