Refractory silica brick is the most important material when you build the crown and roof of a glass melting furnace.
If you choose a bad brick for your glass kiln, the roof will drop flakes into the glass liquid and ruin the whole batch of production. That is why a professional silica refractory brick company always tells you to look at the raw material quartzite purity and the firing temperature inside the tunnel kiln, rather than just choosing by low cost.
1.Crucial silica brick properties for glass kilns
Let us look closely at the actual silica fire brick features.
The main silica brick composition is SiO2, which must be more than 96% for glass furnace application.
Why do glass engineers only want this material for the crown? The answer is in the unique silica brick properties at high heat.
When the furnace heats up, the brick expands. But once it passes 600°C, the volume becomes completely stable. It does not shrink back when running at high temperatures.
Also, the silica brick thermal conductivity rises as the temperature goes up, which helps keep the heat distribution balanced across the massive furnace arch.
Another point is the weight. Our standard silica brick density is controlled around 1.8 to 1.95 g/cm³. This light weight is excellent because it reduces the total dead load on the kiln supporting steel structure, preventing structural failure during long-term operation.
2.Silica firebrick dimensions and specifications
In our manufacturing plant, we produce many different silica brick specifications depending on the specific kiln drawings.
Buyers often ask for standard 230x114x65mm bricks for simple walls, but for glass melting furnace crowns, you need large wedge bricks, arch bricks, and heavy special shapes.
You can check all the precise measurements and tolerances in our standard silica brick catalogue and technical silica brick datasheet.
3.Silica refractories application and factory price
The main silica refractory brick uses are concentrated in the crown, arch, and breast walls of glass tank furnaces, as well as hot blast stoves and coke ovens.
For glass makers, this specific silica brick application is irreplaceable because the acid gas coming from the melting glass batch does not corrode SiO2 materials.
If you are searching for a reliable silica refractory fire brick factory in China, Ruitai Lianxin gives you direct factory wholesale prices.
The actual silica brick price depends on the raw material grade and the total firing time in our kilns. We make sure every single brick gets enough firing time to convert quartz into tridymite completely, preventing risky expansion problems when you start your furnace.
Contact us to get your customized silica brick refractory solution today.