Refractory Composition Thermal Shock Resistance
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Solution Overview
Problem
Refractory articles used in high-temperature processes face challenges with corrosion, shock, and deformation, leading to frequent replacement or repair, which results in downtime due to inadequate resistance to these extreme conditions.
Innovation Solution
A refractory composition comprising 50% to 90% chamotte, 5% to 25% mullite, 3% to 20% fused silica, and 3% to 30% aqueous colloidal silica binder, with specific particle size distributions and proportions of chamotte components, providing enhanced shock and creep resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional refractory compositions are used, then the refractory articles can withstand high temperature processes, but they exhibit insufficient resistance to thermal shock and creep, leading to frequent replacement
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating specific amounts of colloidal silica (3-30% by weight), mullite (5-25% by weight), and fused silica (3-20% by weight) to achieve improved thermal shock and creep resistance. This compositional parameter change directly addresses the reliability issue without requiring system redesign.
Solution Approach 2:
The patent creates a composite refractory material combining multiple components: chamotte (50-90% by weight), mullite, fused silica, and colloidal silica binder. This composite structure leverages the complementary properties of each component to achieve superior thermal shock and creep resistance compared to conventional single-material refractories.
2Productivity
If refractory articles are used in extreme high temperature conditions, then they can perform their function, but they suffer from corrosion and deformation, requiring periodic replacement
Solution Approach 1:
The patent modifies the chemical composition by adding mullite (5-25% by weight) and fused silica (3-20% by weight), which provide enhanced resistance to chemical corrosion and thermal deformation. These parameter changes enable the refractory to withstand extreme conditions without degradation.
Solution Approach 2:
The composite refractory composition combines chamotte with mullite and fused silica to create a material that resists both mechanical deformation and chemical corrosion at high temperatures, addressing the harmful factors that limit continuous operation.
3Reliability
If refractory articles require periodic replacement or repair, then they can maintain process safety, but it results in downtime for the industrial process
Solution Approach 1:
By optimizing the composition parameters—specifically the ratios of chamotte, mullite, fused silica, and colloidal silica—the patent extends the service life of refractory articles, reducing the frequency of replacement and maintaining industrial process continuity.
Solution Approach 2:
The patent applies colloidal silica as a binder during manufacturing to pre-strengthen the refractory structure, improving its durability and extending service life before replacement is needed, thereby preventing future downtime.
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 refractory composition exhibits excellent high-temperature shock resistance and creep resistance, reducing the need for frequent replacement and minimizing downtime in industrial processes.
Implementation Method 1
about 3% to about 30% by weight of an aqueous colloidal silica binder
Implementation Method 2
The refractory composition exhibits excellent high-temperature shock resistance and creep resistance
Implementation Method 3
The refractory composition exhibits excellent high-temperature shock resistance and creep resistance
Data Source
AI summary
A refractory composition yields refractory articles having excellent resistance to high-temperature thermal shock and creep. The refractory composition is based primarily on chamotte having controlled particle sizes, and may also include mullite, fused silica, calcined alumina and microsilica, having controlled particle sizes. The refractory composition includes an aqueous colloidal silica binder that provides excellent castability and binding between the ingredients following drying.