Semi silica bricks represent an economical yet high-performance refractory solution designed for industrial applications operating in the 1200-1450°C (2192-2642°F) temperature range. With silica content typically between 65-80% and alumina content of 15-30%, these versatile refractory bricks offer an optimal balance between performance and cost-effectiveness. Unlike standard fireclay bricks, semi-silica formulations demonstrate 2-3x better thermal shock resistance and 30% lower thermal conductivity, making them particularly suitable for cyclic heating applications found in boiler furnaces, hot blast stoves, and ceramic kilns. Their unique composite microstructure, combining cristobalite and mullite phases, provides excellent volume stability while maintaining good resistance to acidic slags and iron oxide penetration.
Product Parameters
| Product Name | Semi-silica brick |
| AI2O3/% | 21.59 |
| SiO2/% | 76.58 |
| Fe2O3/% | 0.83 |
| Refractoriness℃ | 1630-1650 |
| Bulk Density g/cm³ | 2.1 |
| Apparent Porosity % | 18 |
| Normal temperature compressive strength / MPa | 29 |
| Load softening temperature (T6.6) / °C | 1490 |
Product Usage:
Semi silica bricks find extensive use in various industrial applications due to their versatile performance.
In the metallurgical sector, they are commonly used in ladle linings and the lower steel casting system, where they provide excellent resistance to slag erosion and thermal shock.
In the glass industry, semi silicon bricks are used in furnace roofs and regenerative chambers, protecting against the corrosive effects of molten glass.
They are also employed in ceramic kilns, rotary cement kilns, and petrochemical reactors, where their high-temperature stability and durability are crucial for long service life and minimal maintenance.
Product Advantages
high refractoriness
with a melting point above 1610℃, ensuring they can withstand extreme temperatures without deforming.
thermal shock resistance
maintain integrity during rapid temperature changes.
low thermal expansion
minimizes the risk of cracking or deformation
high compressive strength
ensures dimensional stability under significant mechanical loads.
resistant to acid and slag corrosion
making them ideal for chemically aggressive environments
Customizable:
Available in various sizes, shapes, and densities to meet specific needs.
Product technology:
The production of semi-Silica Bricks involves advanced technology and rigorous quality control to ensure superior performance. Key steps include:
Key steps include:
Raw materials, including pyrophyllite and clay, are carefully selected and blended to achieve the desired chemical composition.
The mixture is then molded into the desired shape using high-pressure presses and dried to remove moisture.
The molded bricks are subjected to high-temperature firing in specialized kilns, with temperatures reaching up to 1600℃. This firing process ensures the formation of a stable crystalline structure, enhancing the bricks' refractory properties.
After firing, the bricks undergo rigorous quality inspection to verify their physical and chemical .
Why Choose Us?
23+
years experience focus on refractories field
2 plants
with 3 sets of tunnel kilns for 120,000 tonnes capacity
3 QC
Labs Technology Centres
120+ employees
with ISO9001,TUV,SGS,Intertek certifications
100+
abroad customers in 50+ countries
20+
major industry furnace projects yearly
Packing
FAQ
Hot Tags: semi silica bricks, China semi silica bricks manufacturers, suppliers, factory, Alumina Ceramic Mosaic Tiles, Ceramic Fiber Board, anti acid products, Welding Fire Blanket, Ceramic Fiber Module, industry ceramics
