18560737. MOLTEN STEEL DENITRIFICATION METHOD AND STEEL PRODUCTION METHOD simplified abstract (JFE STEEL CORPORATION)
Contents
MOLTEN STEEL DENITRIFICATION METHOD AND STEEL PRODUCTION METHOD
Organization Name
Inventor(s)
Hidemitsu Negishi of Tokyo (JP)
MOLTEN STEEL DENITRIFICATION METHOD AND STEEL PRODUCTION METHOD - A simplified explanation of the abstract
This abstract first appeared for US patent application 18560737 titled 'MOLTEN STEEL DENITRIFICATION METHOD AND STEEL PRODUCTION METHOD
Simplified Explanation: The patent proposes a method to achieve a very low nitrogen concentration in molten steel quickly without using top-blown gas. It involves denitrification using CaO and AlO-containing slag formed by adding Al and CaO to the molten steel, stirring the molten steel at a high power density, and maintaining a low-pressure atmosphere.
- Molten steel denitrification method using CaO and AlO-containing slag
- Al addition step to deoxidize molten steel and create Al-containing molten steel
- CaO addition step to remove nitrogen from the molten steel
- Stirring the molten steel at a high power density of 60 W/t or higher
- Maintaining a low-pressure atmosphere of 1.0×10Pa or lower during denitrification process
Potential Applications: This technology can be applied in steel production processes where achieving low nitrogen concentrations in molten steel is crucial. It can improve the quality of steel products by reducing nitrogen content, leading to better mechanical properties and overall performance.
Problems Solved: 1. Rapidly achieving low nitrogen concentrations in molten steel 2. Eliminating the need for top-blown gas in denitrification processes 3. Enhancing the deoxidation and denitrification efficiency in steel production
Benefits: 1. Improved steel quality with reduced nitrogen content 2. Faster denitrification process without the use of top-blown gas 3. Enhanced mechanical properties and performance of steel products
Commercial Applications: The technology can be utilized in steel manufacturing plants to produce high-quality steel products with superior mechanical properties. It can benefit industries that require stringent quality control in their steel production processes.
Prior Art: Prior research in the field of molten steel denitrification has focused on various methods to reduce nitrogen content, including the use of different slag compositions and stirring techniques. Researchers have explored the impact of different additives on the denitrification process and steel quality.
Frequently Updated Research: Ongoing research in the field of steel production continues to explore innovative methods for improving the quality and performance of steel products. Studies focus on optimizing denitrification processes, enhancing deoxidation efficiency, and developing new techniques for controlling nitrogen content in molten steel.
Questions about Molten Steel Denitrification: 1. How does the stirring power density affect the efficiency of nitrogen removal in molten steel denitrification? 2. What are the potential environmental benefits of reducing nitrogen content in steel production processes?
Original Abstract Submitted
A method by which an extremely low nitrogen concentration range can be stably reached in a short time without use of a top-blown gas is proposed. A molten steel denitrification method is a denitrification process in which CaO-and-AlO-containing slag formed by a combination of an Al addition step of adding a metal-Al-containing substance to molten steel to deoxidize and turn the molten steel into Al-containing molten steel and a CaO addition step of adding a CaO-containing substance to the molten steel is brought into contact with the Al-containing molten steel to remove nitrogen in the molten steel, in which the molten steel is stirred at a stirring power density ε of 60 W/t or higher. It is preferable that, in the denitrification process, a surface of the molten steel or the slag is subjected to an atmosphere of 1.0×10Pa or lower. In a steel production method, the obtained molten steel is cast after the components are adjusted.
