Sillimanite bricks are high-performance refractory materials made from sillimanite minerals, which are calcined at high temperatures to transform into mullite and free silica. These bricks are known for their superior thermal stability, low thermal expansion rate, and excellent resistance to chemical erosion. They are produced using either high-temperature firing or slurry casting methods. Sillimanite refractory bricks offer better physical and chemical properties than high-alumina bricks, with a refractoriness of 1770–1830°C and a load softening starting point of 1500–1650°C.
Product Parameters
|
Item |
LS-65 |
LS-60 |
|
AL2O3% |
≥65 |
≥60 |
|
SiO2% |
≤32 |
≤37 |
|
Fe2O3% |
≤0.5 |
≤1 |
|
Bulk density g/cm3 |
≥2.5 |
≥2.3 |
|
Apparent porosity % |
≥18 |
≥19 |
|
Cold crushing strength/ Mpa |
≥80 |
≥80 |
|
Refractoriness under load(0.2MPa) °C |
≥1650 |
≥1600 |
Product Usage:
Sillimanite bricks are widely used in various high-temperature industries:
Glass Industry: Used in glass melting furnaces, forehearths, feeders, and pipe-drawing machines due to their resistance to glass liquid corrosion.
Metallurgy: Suitable for blast furnace linings, furnace throats, and other areas requiring high-temperature stability.
Ceramics: Used as kiln furniture and in other ceramic manufacturing processes.
Chemical Industry: Employed in areas where resistance to chemical attack is crucial
Product Advantages
1. Cracks and Defects: To prevent cracks, manufacturers use controlled cooling and high-precision molding techniques. Regular quality inspections ensure only defect-free bricks are shipped.
2. Erosion Resistance: Sillimanite bricks' dense structure and high zirconia content provide excellent resistance to erosion, extending their service life.
3. Thermal Shock Resistance: The bricks' ability to withstand rapid temperature changes without degrading makes them suitable for applications with frequent thermal cycling.
4. Customization: Manufacturers offer customization options to meet specific size and shape requirements, ensuring the bricks fit perfectly into the intended equipment.
5. Quality Assurance: Reputable manufacturers adhere to strict quality control standards, using high-purity raw materials and advanced production techniques. They also provide detailed product specifications and certifications to give buyers confidence in their purchase.
Product technology:
Key steps include:
The production of sillimanite bricks involves several key steps:
1. Raw Material Selection: High-purity sillimanite minerals are selected and crushed into the required particle sizes.
2. Mixing and Formulation: The crushed minerals are mixed with binders and other additives to form a slurry.
3. Molding: The slurry is poured into molds and shaped into the desired forms.
4. Drying: The molded bricks are dried to remove excess moisture.
5. Firing: The dried bricks are fired at high temperatures (1350–1400°C) to achieve the desired properties.
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
Proper packaging is crucial to ensure the safe transportation and storage of sillimanite bricks. The bricks are typically packaged in wooden crates or pallets, which provide adequate protection against damage during transit. Each crate or pallet is carefully secured with straps or bands to prevent movement during shipping. Additionally, the packaging materials are designed to be moisture-resistant, safeguarding the bricks from potential water damage.
FAQ
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