Coke Oven Corbel Tongue-and-Groove Refractory Blocks
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Solution Overview
Problem
Coke ovens with traditional refractory brick structures face challenges in durability, maintenance, and cost due to the need for multiple brick types and complex designs, with large bricks being expensive and difficult to handle, and existing solutions for monolithic refractory blocks do not fully optimize flue gas containment and assembly efficiency.
Innovation Solution
The coke oven corbel structures are designed with multiple stacked tiers of refractory blocks featuring tongue-and-groove interconnections to form reliable joints, minimizing flue gas escape and allowing for efficient assembly and repair, using a combination of vertically and diagonally oriented flues with specialized block shapes to enhance structural integrity and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional refractory brick structures are used, then the coke oven can be constructed with multiple brick types to achieve complex designs, but the construction cost increases and assembly time increases
Solution Approach 1:
The corbel structure is divided into multiple modular units (first corbel unit, second corbel unit, etc.), each comprising standardized refractory blocks with tongue-and-groove features. This segmentation allows complex structures to be built from simple, repeatable modules, reducing assembly time while maintaining design flexibility through modular arrangement.
Solution Approach 2:
The refractory blocks are designed with universal tongue-and-groove interconnection features that can be applied across all blocks regardless of their specific position or function in the corbel structure. This universal interface standardizes the assembly process for all blocks, reducing the need for specialized handling procedures and decreasing overall assembly time.
2Quantity of substance
If large-sized refractory bricks are used, then the number of bricks required is reduced, but the handling difficulty increases and specialized lifting devices are required
Solution Approach 1:
Instead of using a small number of very large bricks, the structure uses a greater number of moderately-sized blocks that can be handled with conventional equipment. The tongue-and-groove design allows these smaller blocks to be assembled into a structure that would otherwise require fewer, larger bricks, thereby improving handling ease while maintaining structural integrity.
Solution Approach 2:
Multiple moderately-sized blocks with tongue-and-groove features are combined to form a unified corbel structure that functions as a single integrated unit. This merging approach achieves the structural efficiency of large bricks while using smaller, more handleable components that can be assembled with conventional lifting equipment.
3Ease of manufacture
If conventional silica bricks are used, then the production cost is reduced, but the heat-up time increases significantly
Solution Approach 1:
The refractory blocks utilize fused silica material, which combines the low-cost advantages of conventional silica with the rapid heat-up properties of fused material. This material selection achieves both economical production and reduced heat-up time, avoiding the need to choose between cost and performance.
Solution Approach 2:
The material is processed into a fused state, fundamentally changing its physical properties compared to conventional pressed silica bricks. This parameter change (from pressed to fused) dramatically reduces heat-up time while maintaining the cost-effectiveness of silica-based materials, as the fusion process creates a more thermally responsive structure.
4Ease of manufacture
If traditional refractory brick structures are used, then the construction is completed with standard materials, but the flue gas containment is insufficient and repair frequency increases
Solution Approach 1:
The tongue-and-groove features are pre-formed as integral parts of each refractory block during manufacturing. This preliminary action ensures that when blocks are assembled, the interlocking features are already in place, creating immediate and reliable flue gas containment without requiring additional sealing materials or procedures, thereby improving reliability while using standard materials.
Solution Approach 2:
The tongue-and-groove interconnection structure acts as an intermediary mechanism between adjacent refractory blocks, creating a mechanical and sealing interface that prevents flue gas leakage. This intermediary feature transforms simple block placement into a reliable, interlocked assembly that maintains containment integrity while using conventional refractory materials.
Data Source
AI summary
Coke oven corbel structures include an assembly of multiple stacked tiers of refractory blocks defining a plurality of substantially vertically oriented central flues and a plurality of diagonally oriented lateral flues. At least one tier of refractory blocks in the assembly includes a plurality of tongue-and-groove interconnected refractory blocks. This plurality of interconnected refractory blocks of the at least one tier comprise mutually substantially orthogonal faces defining an edge and respectively including an elongate tongue protruding outwardly therefrom and an elongate groove recessed therein. The elongate tongue and groove include respective adjacent ends which co-terminate with one another at the edge defined by the mutually orthogonal faces of the refractory blocks.