Collector Nozzle Second Case for Continuous Casting
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Solution Overview
Problem
In continuous casting, base metal adheres to the shroud nozzle, leading to increased maintenance costs, reduced productivity, and degradation of molten steel quality due to the need for oxygen cleaning and potential air introduction during cleaning processes.
Innovation Solution
A collector nozzle design featuring a second metal component case that covers the exit surface of the nozzle body, with protrusion members arranged in a zigzag or oblique pattern, which allows base metal to adhere and be automatically removed, preventing it from falling back onto the shroud nozzle and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base metal is allowed to form between the nozzle body and shroud nozzle, then the shroud nozzle can be protected from direct contact with molten steel, but base metal adheres to the shroud nozzle causing increased maintenance costs and reduced productivity
Solution Approach 1:
The invention extracts the base metal accumulation problem from the shroud nozzle by introducing a separate second case that specifically receives and contains the base metal. This allows the shroud nozzle to remain protected while the base metal is isolated in a removable component, eliminating the need for frequent maintenance of the shroud nozzle itself.
Solution Approach 2:
The second case acts as an intermediary component between the nozzle body and shroud nozzle. It receives the base metal that forms during operation and prevents it from adhering to the shroud nozzle, thereby protecting the shroud nozzle while managing the base metal accumulation issue.
2Manufacturing precision
If oxygen cleaning is performed to remove base metal from the shroud nozzle, then steel quality can be maintained, but air is introduced into the molten steel causing degradation
Solution Approach 1:
The invention extracts the base metal from the shroud nozzle environment by providing a dedicated second case that collects and contains the base metal separately. This eliminates the need for oxygen cleaning of the shroud nozzle, thereby preventing air from being introduced into the molten steel while still maintaining steel quality through proper base metal management.
3Reliability
If the second case is designed to cover the entire exit surface, then base metal adhesion to the shroud nozzle is prevented, but device complexity increases
Solution Approach 1:
The invention segments the nozzle structure into distinct functional components: the nozzle body, the second case for base metal containment, and the shroud nozzle. This segmentation allows each component to perform its specific function efficiently while maintaining overall system simplicity and ease of assembly.
Solution Approach 2:
The second case is designed as a consumable or easily replaceable component that can be removed and replaced when filled with base metal. This approach reduces device complexity by making the base metal containment function disposable rather than requiring a complex permanent structure.
Data Source
AI summary
A collector nozzle for continuous casting may include: a nozzle body extended toward a shroud nozzle, and having an internal movement path through which molten steel is moved; a first case covering a side surface of the nozzle body; and a second case including a second metal component, connected to the first case, and covering an exit surface of the nozzle body facing the shroud nozzle. The first case can include a first metal component, and the first and second cases may be connected through welding or formed as one body.