Liquid steel is an important metal material with extensive applications in various fields. However, due to some reasons in the production process, steel often contains impurities, with hydrogen being the most common. The presence of hydrogen can have a negative impact on the quality of steel, therefore, researching and developing hydrogen refining technologies for steel has become crucial.
Hydrogen is a very active element that can react chemically with other metal elements in molten steel, forming bubbles. These bubbles will adhere to the surface of particles in the steel liquid and form internal defects during solidification, reducing the strength and toughness of the steel liquid. In addition, hydrogen can also promote the occurrence of hydrogen embrittlement, leading to easy fracture of steel in practical use. Therefore, research on hydrogen refining technology is crucial for improving the quality of steel liquid.
There are two main methods for hydrogen refining technology: physical refining and chemical refining. Physical refining is achieved by utilizing the difference in solubility of hydrogen gas. The hydrogen gas in the steel liquid will react with the solute in the steel liquid, forming bubbles. By taking measures such as heating, bubbles can rise to the surface of the molten steel, thereby achieving the goal of hydrogen refining. Chemical refining is achieved by adding special chemical agents to the molten steel, allowing hydrogen to react with it to generate gas or dissolved substances, thereby achieving the removal of hydrogen. These chemical agents often react selectively with hydrogen gas, thus not affecting other elements in the steel liquid.
The research on hydrogen refining technology is a complex and critical process. Firstly, it is necessary to have a deep understanding of the source and content of hydrogen gas in the molten steel. Hydrogen mainly comes from the moisture in the raw materials, hydrogen in the fuel, and oxide reduction reactions in the steel liquid. Secondly, it is necessary to choose appropriate refining methods and reagents. Different steel compositions and process requirements can have an impact on the selection of refining methods and reagents. Finally, experimental verification and optimization are required. Through experiments, the optimal refining method and dosage of reagents can be determined to achieve the best refining effect.
The research on hydrogen refining technology is not only of great significance for improving the quality of steel, but also has a positive impact on environmental protection. Hydrogen is a greenhouse gas, and its emissions can lead to global warming. By effectively refining hydrogen in molten steel, hydrogen emissions can be reduced, contributing to environmental protection.
In summary, hydrogen refining technology for molten steel is an important and complex research task. It is of great significance for improving the quality of steel and reducing the hydrogen content in steel. By selecting appropriate refining methods and reagents, and conducting experimental verification and optimization, hydrogen refining in steel can be achieved, improving the quality of steel and protecting the environment.