控制连铸中间包钢水增氮的方法、连铸坯的制备方法和钢产品
By optimizing the tundish level control and the insertion depth of the long nozzle, combined with argon blowing, the problem of nitrogen addition to molten steel was solved, achieving high-quality and efficient production of continuously cast billets and improving the performance and yield of steel.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN VALIN LIANYUAN IRON & STEEL CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-17
AI Technical Summary
In the process of steel smelting and continuous casting, nitrogen is easily added to molten steel, which leads to a decline in steel performance. Existing technologies are difficult to effectively control the nitrogen content in molten steel, affecting product quality and yield.
By optimizing the tundish liquid level control, the insertion depth of the long nozzle, and the argon blowing time, combined with precise control of the rising and falling speed of the molten steel in the tundish and the angle between the long nozzle and the tundish, the contact between the molten steel and air is reduced, thus lowering the risk of nitrogen accumulation.
Effectively controlling the nitrogen content in continuously cast billets within a reasonable range improves product quality and yield, reduces scrap losses, and ensures the mechanical and weldability of steel.
Smart Images
Figure CN121104035B_ABST