Immersion nozzle
EP4592004A4Pending Publication Date: 2026-07-08KROSAKI HARIMA CORP
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- KROSAKI HARIMA CORP
- Filing Date
- 2023-08-23
- Publication Date
- 2026-07-08
AI Technical Summary
Technical Problem
Existing immersion nozzles face issues with cracking and sinking in the neck portion, leading to operational interruptions and steel contamination, which existing solutions have not adequately addressed.
Method used
The immersion nozzle design incorporates a bridging member that bridges the metal case and nozzle body, with the nozzle body's outer surface extending vertically to avoid direct stress concentration, and a flange portion made of refractory material to suppress sinking, while maintaining a horizontal plane with the nozzle body.
Benefits of technology
This design effectively prevents cracking and sinking, ensuring continuous operation and improved steel quality by minimizing stress concentration and maintaining structural integrity.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure IMGAF001_ABST
Abstract
The present invention is intended to make it possible for an immersion nozzle applicable to an immersion nozzle replacement apparatus to satisfy both the suppression of occurrence of cracks in a neck portion thereof and the suppression of occurrence of sinking thereof. In the immersion nozzle 10 according to the present invention, a bridging member 15 is provided to bridge an inner peripheral surface of a metal case 13A surrounding a flange portion 12 and an outer peripheral surface of a nozzle body 11. The bridging member 15 has one end fixed to the metal case 13A and the other end engaged with a recess 11c provided in the outer peripheral surface of the nozzle body 11. Further, in an area above an action point of an upward support force by a support device of the immersion nozzle replacement apparatus, the outer peripheral surface of the nozzle body 11 is formed to have a shape extending in a vertical direction without dimensional change with respect to a central axis of an inner bore 11a, except for the recess 11c.
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