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Anneke and University of Science and Technology Beijing signed a cooperation agreement on research of new refractory materials for hydrogen metallurgy

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2022-03-27

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Recently, Annike and Beijing University of Science and Technology signed a technical development cooperation agreement on the project "Research and Development of Refractory Corrosion Mechanism and New Refractory Materials for Hydrogen-based Shaft Furnace" to fully promote the technical development of key refractories for hydrogen metallurgy.

In order to meet China's more stringent energy consumption "double control" and "double carbon" requirements, the iron and steel industry to achieve carbon emission reduction targets, the need to innovate the traditional smelting process, and hydrogen metallurgy is an excellent metallurgical technology to achieve low carbon near zero emissions. The application of hydrogen energy in the field of metallurgy will promote the transformation of traditional "carbon metallurgy" to a new type of "hydrogen metallurgy", so that steel production can get rid of the dependence on fossil energy and solve the problem of carbon emissions from the source. Therefore, the technological development of hydrogen energy metallurgy and its upstream and downstream industrial chains is one of the important ways for my country and the global steel industry to achieve low-carbon transformation.

Hydrogen metallurgy is of great significance in the low-carbon development of the iron and steel industry. Iron and steel enterprises in Europe, America, Japan, South Korea and other countries and regions have formulated a roadmap of low-carbon metallurgy technology, including hydrogen energy metallurgy, which is being developed, tested and applied. Some iron and steel enterprises in China have issued carbon emission reduction targets and timetables, are planning low-carbon development strategies, and actively carry out exploration and research on relevant technologies in conjunction with scientific research institutions, and conduct industrial experiments. The main process technologies of hydrogen metallurgy in China include hydrogen shaft furnace direct reduction technology, blast furnace hydrogen-rich smelting technology, hydrogen-based melting reduction ironmaking technology, etc.

Anneke will work with Professor Hou Xinmei's team from Beijing University of Science and Technology to conduct research on the corrosion mechanism of refractories for hydrogen-based shaft furnaces, develop new long-life refractories for hydrogen metallurgy furnaces, and conduct application research. The high-temperature interface reaction mechanism of refractories for hydrogen-based shaft furnaces was studied by experiments, model calculations, simulation and other methods, the erosion mechanism was clarified, the structure-effect relationship between the structure and performance of refractories during service was established, and a new preparation process for atomic/molecular-micro-macro multi-scale structure transfer to achieve performance improvement was proposed, which provided basic data, theoretical support and material guarantee for the popularization and application of hydrogen metallurgy process. By quantifying the effects of different factors (H2 partial pressure, flow rate, temperature, etc.) on the reaction behavior of the gas-solid interface of refractory materials, the gas-solid interface reaction between refractory materials and reducing atmosphere is explored, the corresponding gas-solid reaction dynamics model is established, the mechanism of refractory material erosion is revealed, and the direction of performance improvement is proposed. With the help of experimental characterization and atomic/molecular scale simulation of gas-solid interface interaction process, the structural evolution mechanism of each component of refractory materials in the service process is analyzed, the synergistic law of material structure regulation and performance matching is analyzed, the controllable theory of refractory structure is established, the correlation between process parameters-refractory raw materials-refractory characteristics is established, and the controllable batch preparation of refractory materials is realized under hydrogen reduction conditions. Further optimize the composition control, microstructure design and preparation process parameters, summarize the performance evaluation mechanism of hydrogen-based shaft furnace refractories, improve the performance improvement theory, and provide theoretical basis and scientific guidance for the continuous improvement of refractory performance.

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