Silica Brick for Hot Blast Stoves
Application Industry: Refractories for Steel Industry
Application Equipment: Hot Blast Stove Combustion Chamber, Vault, and Checker Regenerator
Size: Standard silica brick geometry for Hot Blast Stove (custom sizes and shapes available on request)
Products Overview
Our Silica Brick for Hot Blast Stoves is a dense acid refractory product consisting mainly of tridymite, cristobalite, and a small amount of residual quartz and glass phases. The Silica Brick for Hot Blast Stoves product family is engineered for hot blast stove combustion chamber, vault, and checker regenerator service, with silica content of 95 percent or higher for high temperature stability.
The Silica Brick for Hot Blast Stoves product family is offered in two application-specific geometry grades covering Vault brick and Checker brick for the hot blast stove lining design. Both grades deliver a true density of 2.35 g/cm³ or higher, with load softening start temperature of 1620 to 1670 °C and long-term high temperature use without deformation. The thermal shock stability is low (water heat exchange for 1 to 4 cycles), reflecting the inherent low thermal shock behavior of silica bricks.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Silica Brick for Hot Blast Stoves grade is engineered to ASTM, GB/T, and ISO refractory standards. For an overview of the broader catalogue, see the Refractories for the Steel Industry category, or contact our technical sales team for a free consultation against your refractory drawing.
Product Features
Features:
- Manufactured from tridymite, cristobalite, and a small amount of residual quartz and glass phases for hot blast stove fireclay service
- Engineering-proven SiO2 content of 95 percent or higher for hot blast stove vault and checker brick applications
- Load softening start temperature of 1620 to 1670 °C with good high temperature strength in long-term high temperature service
- Residual volume expansion of 1.5 to 2.2 percent at 1450 °C under reducing atmosphere ensures tight masonry joints and structural strength
- Two application-specific geometry grades covering Vault brick and Checker brick for hot blast stove lining design
Product Specification
Standard silica brick geometry is engineered per buyer’s Hot Blast Stove design. Custom sizes and shapes available on request.
| Items | Silica Brick for Hot Blast Stoves | |
|---|---|---|
| Vault Brick | Checker Brick | |
| SiO2 content ≥ (%) | 95 | 95 |
| Apparent Porosity ≤ (%) | 22 | 23 |
| Cold Crushing Strength ≥ (MPa) | 35 | 30 |
| Bulk Density ≥ (g/cm³) | 2.35 | |
| High Temperature Creep Rate (0.2 MPa, 1550 °C, 50h) ≤ (%) | — | 0.8 |
| Thermal Linear Expansion (1500 °C) ≤ (%) | — | 1.26 |
Note: Two application-specific geometry grades for Hot Blast Stove lining design. Both grades maintain SiO2 content of 95 percent or higher and bulk density of 2.35 g/cm³ or higher. The Vault brick is optimized for the combustion chamber dome and the Checker brick for the regenerator. The Thermal Shock Stability is inherently low (water heat exchange 1 to 4 cycles), reflecting the inherent low thermal shock behavior of silica bricks and the need for gradual heating in service. For project-specific chemistry, contact CH Refractories engineering.
Product Applications
Silica Brick for Hot Blast Stoves is a dense acid refractory product manufactured from tridymite, cristobalite, and residual quartz and glass phases, engineered for hot blast stove combustion chamber, vault, and checker regenerator service. The product family delivers SiO2 content of 95 percent or higher, true density of 2.35 g/cm³, with acid slag corrosion resistance and load softening start temperature of 1620 to 1670 °C.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: Hot Blast Stove Combustion Chamber, Vault, and Checker Regenerator of large and medium-size Blast Furnaces.
Specific Application Zones: The Vault brick grade is engineered for the Hot Blast Stove dome and combustion chamber vault positions where the highest mechanical strength is required. The Checker brick grade is engineered for the Hot Blast Stove regenerator checker chamber positions where low creep rate and thermal linear expansion behavior ensure structural integrity under heating-cooling cycles. Both grades deliver residual volume expansion of 1.5 to 2.2 percent at 1450 °C under reducing atmosphere, making the masonry joints tight and ensuring good air tightness and structural strength of the masonry.
CH Refractories is a Silica Brick for Hot Blast Stoves manufacturer in China, Henan, Zhengzhou. The complete Silica Brick for Hot Blast Stoves product family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory standards. Each batch is supported by free consultation, on-site technical support, and a dedicated engineering team serving Refractories for the Steel Industry customers across the global iron and steel value chain.
