Steel Ladle Taper Plate Assemblies for Refractory Compression
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Solution Overview
Problem
Conventional extension rings in steel production ladles deform over time, leading to loss of refractory lining compression, premature removal of ladles from service, and requiring routine maintenance or replacement.
Innovation Solution
The use of taper plate assemblies with a conical taper plate and ring-shaped support flange, which maintain refractory linings in compression by providing a greater than 30° taper angle, ensuring stability and durability during multiple casting operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional extension rings are used to restrain refractory linings, then initial compression is provided, but the rings deform over time and lose compression capability
Solution Approach 1:
The invention changes the geometric parameters of the restraint structure by using a tapered plate with a specific angle (greater than 30 degrees) instead of a conventional vertical extension ring. This parameter change allows the plate to maintain compression on the refractory lining over time by distributing forces more effectively, preventing the deformation that plagues conventional rings.
Solution Approach 2:
The tapered plate introduces a curved or angled geometry rather than a straight vertical structure. This curvature/angle allows the plate to better accommodate the thermal and mechanical stresses in the ladle environment, maintaining its structural integrity and compression capability throughout the service life.
2Strength
If conventional extension rings are used, then refractory lining restraint is achieved, but deformation occurs leading to premature ladle removal
Solution Approach 1:
By changing the geometric parameter from a vertical ring to a tapered plate at greater than 30 degrees, the structure achieves both strong restraint capability and long-term structural stability. The angle parameter optimizes the distribution of thermal and mechanical loads, preventing deformation while maintaining restraint.
3Ease of manufacture
If conventional extension rings are used, then initial refractory compression is provided, but routine maintenance and replacement are required
Solution Approach 1:
The tapered plate design is engineered to maintain its compression capability throughout the entire service life of the ladle without requiring intermediate maintenance or replacement. The structure essentially serves itself by continuously providing the necessary restraint force through its geometric design, eliminating the need for routine maintenance interventions.
Data Source
AI summary
Taper plate assemblies are disclosed that may be installed on the top of steel casting ladles to restrain and maintain refractory lining materials in compression during casting operations. The taper plate assemblies include a generally conical taper plate supported by a ring-shaped support flange and a support collar. The taper plate is located at least partially above a refractory top ring that may comprise a castable refractory material, and is designed to maintain the refractory top ring in compression during multiple casting operations.