Product Overview
Our BG-96A Silica Brick is a premium high-purity silica refractory specifically engineered for the superstructure of glass melting furnaces. The “BG” designation stands for “Glass Furnace Silica Brick,” while “96A” indicates a minimum silica (SiO₂) content of 96% with the highest performance grade classification .
Manufactured from high-purity quartzite with carefully selected mineralizers, BG-96A silica bricks feature a stable microstructure dominated by tridymite and cristobalite crystals with minimal residual quartz. This unique phase composition provides excellent volume stability, high load-bearing capacity under elevated temperatures, and superior resistance to alkaline vapor attack—making them the industry standard for glass furnace crowns and superstructures .
Key Features & Benefits
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Exceptional High-Temperature Strength: BG-96A silica bricks maintain their mechanical strength even at temperatures approaching their melting point, with a refractoriness under load (T0.6) of ≥1680°C. This ensures structural integrity of the furnace crown under extreme operating conditions .
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Excellent Volume Stability: The optimized mineral composition, with controlled tridymite-cristobalite ratio and residual quartz content below 3% , ensures minimal permanent linear change (0-0.2% at 1450°C×2h) during operation, preventing crown deformation and maintaining furnace sealing .
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Superior Alkali Resistance: The dense microstructure and high purity minimize reaction with alkaline vapors from the glass batch, extending service life in the chemically aggressive atmosphere of the furnace superstructure .
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Low Impurity Content: With Fe₂O₃ content strictly controlled to ≤0.6-0.8% and a Melt Flow Index (fluxing index) of ≤0.5% , BG-96A bricks minimize the formation of low-melting phases that could compromise high-temperature performance or contaminate the glass .
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Accurate Dimensional Tolerances: Precision forming and controlled firing ensure consistent dimensions, facilitating tight joint construction and reducing installation time .
Applications
BG-96A silica bricks are specifically designed for the critical superstructure zones of glass furnaces where high temperatures and alkaline vapor exposure require maximum performance:
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Furnace Crown (Main Roof): The primary application for BG-96A bricks, where they must support their own weight at temperatures exceeding 1600°C while maintaining gas-tight sealing .
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Breast Walls and Sidewalls: Upper structure walls above the glass line that are exposed to flame radiation and alkaline vapors .
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Suspended Walls: Channel suspended walls and inlet sealing areas where thermal shock resistance is important .
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Port Arches and Port Necks: The flame port structures that direct combustion gases into the melting chamber .
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Regenerator Crowns: The roofs of regenerator chambers where exhaust gases pass through checkerwork .
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Doghouse Crown: The batch inlet area subject to thermal shock and mechanical abrasion .
Why Choose Our BG-96A Silica Brick?
Our BG-96A silica bricks are manufactured using carefully selected high-purity quartzite and advanced firing cycles that ensure complete and stable phase transformation. Each production batch undergoes rigorous quality control testing to verify:
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Chemical composition by XRF analysis
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Physical properties per ASTM/CNS standards
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Phase composition by XRD analysis
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Dimensional accuracy to customer drawings
With over 15 years of experience in silica refractory technology, our technical team provides comprehensive support, from brick selection and furnace design consultation to installation supervision .
For Inquiries:
Contact our glass industry specialists for application engineering support, custom sizing, or to discuss which silica brick grade is optimal for your specific furnace design. We provide detailed shop drawings, installation recommendations, and certification documents with every order.
