Tundish Impact Pad Conical Surface Turbulence Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Turbulence and surface disruption in continuous caster tundishes caused by the ladle stream of molten steel lead to impurities and chemical changes in the steel bath, resulting in reduced steel quality and safety hazards, despite existing fluid flow control devices being insufficient for high-quality steel production.
Innovation Solution
A tundish impact pad with a conical impact surface area and a radially inwardly and downwardly sloping top wall, creating a continuous annular chamber that redirects and dissipates the incoming ladle stream, reducing turbulence and energy, and featuring a mouth opening design that minimizes 'open-eye' and splashing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional flat impact pads are used in tundishes, then the structure is simple, but turbulence and surface disruption increase leading to poor steel quality
Solution Approach 1:
The impact pad uses a conical surface with a specific apex angle (30-60 degrees) instead of a flat surface. This curved geometry redirects the molten steel flow in a controlled manner, reducing turbulence and preventing surface disruption while maintaining structural feasibility
Solution Approach 2:
The invention adds vertical dimension to the impact pad design by creating a conical surface that extends upward from the tundish floor. This three-dimensional structure controls flow in multiple directions simultaneously, reducing turbulence without requiring complex lateral configurations
2Manufacturing precision
If the ladle stream is fed directly into the tundish bath, then the process is simple, but turbulence causes impurity entrainment and chemical changes
Solution Approach 1:
The conical impact pad serves as an intermediary structure between the ladle stream and the tundish bath. It intercepts the direct flow path and redirects the steel through a controlled trajectory, preventing direct impact on the bath surface and reducing turbulence-induced impurity entrainment
Solution Approach 2:
The impact pad预先 redirects the ladle stream before it can cause harmful turbulence. By intercepting and redirecting the flow in advance, the system prevents the formation of violent surface waves and splashing that would otherwise entrain air and impurities
3Productivity
If high velocity ladle stream is used for efficient steel transfer, then productivity increases, but turbulence and open-eye formation increase reducing steel quality
Solution Approach 1:
The invention converts the harmful high-velocity impact into a beneficial controlled flow pattern. The conical surface utilizes the kinetic energy of the fast-moving steel to create a smooth redirected flow that maintains transfer efficiency while eliminating turbulence and open-eye formation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly reduces turbulence and 'open-eye' formation, leading to improved steel quality by decreasing area average velocity and probability of impurity entrainment, enhancing residence time and temperature uniformity, and promoting particle flotation.
Implementation Method 1
a base having a base surface with a conical impact surface area that establishes an apex
Implementation Method 2
The solution significantly reduces turbulence and 'open-eye' formation
Implementation Method 3
creating a continuous annular chamber that redirects and dissipates the incoming ladle stream
Implementation Method 4
decreasing area average velocity and probability of impurity entrainment
Data Source
AI summary
A tundish impact pad, a tundish containing the same, and a method of using and assembly containing the impact pad and tundish are provided. The tundish impact pad features a base having a base surface with a conical impact surface area establishing an apex, a sidewall, and a top wall extending inwardly relative to the sidewall to terminate at an inner edge establishing a mouth opening spaced above and centered relative to the apex. The top wall includes a lip sloping radially inwardly and downwardly towards the conical impact surface.