News detail
High Alumina Curved Brick: Ideal Lining Material for High-Temperature Industrial Kilns
Overview
High alumina curved brick is a shaped refractory product made from high-grade bauxite clinker as the primary raw material, matched with high-purity alumina powder and binding agents, formed via high-pressure molding and high-temperature sintering. Different from standard straight refractory bricks, it features an integrated curved arc design customized according to kiln inner diameter, eliminating gaps caused by splicing flat bricks. It is a core lining refractory widely applied in circular rotary kilns, tunnel kiln arches, vertical furnaces and high-temperature flue pipelines.
According to alumina content, it is divided into three mainstream grades: 48% Al₂O₃, 65% Al₂O₃ and 75% Al₂O₃. Higher alumina proportion brings stronger refractoriness, better load softening performance and superior chemical corrosion resistance, adapting to varying industrial temperature operating environments.
Core Performance Advantages
- Stable high-temperature resistanceThe refractoriness of high alumina curved brick ranges from 1580℃ to 1790℃, capable of long-term stable operation under continuous high-temperature working conditions. It will not soften, deform or collapse under high thermal load, effectively supporting the structural safety of kiln linings.
- Optimized curved splicing structureThe prefabricated arc surface perfectly fits the circular inner wall of rotary kilns and arched kiln tops. Compared with assembling straight bricks, it reduces assembly gaps, cuts heat loss through gaps, and avoids local high-temperature burnout of the kiln shell. The seamless fit also slows down the erosion of high-temperature flue gas and molten slag to the lining.
- Outstanding thermal shock resistanceThe product adopts optimized mineral phase composition, with low thermal expansion coefficient. It can withstand frequent cold and hot alternation during kiln startup and shutdown without cracking or peeling, greatly extending the service cycle of kiln lining and reducing frequent maintenance downtime.
- Strong anti-slagging and anti-corrosion capacityHigh alumina composition presents weak chemical reactivity with acidic and weakly alkaline kiln atmospheres. It resists erosion from ceramic glaze melt, cement clinker liquid phase and high-temperature ash slag, suitable for ceramic, cement, refractory and non-ferrous metal calcination industries.
- Convenient installation and low construction costEach curved brick is produced with precise dimensional tolerance matching the customer’s kiln diameter. Workers can complete masonry quickly without secondary cutting, shortening construction periods and lowering labor and waste costs.
Main Application Scenarios
- Cement rotary kiln: Preheating zone, transition zone and cooling zone lining
- Ceramic industry: Tunnel kiln arch top, circular shuttle kiln inner wall, sanitary ware firing kiln
- Refractory production: High-temperature rotary calcination kiln, vertical shaft kiln lining
- Non-ferrous metallurgy: Aluminum melting furnace, copper smelting circular flue lining
- Chemical industry: High-temperature circular reaction furnace, thermal insulation flue pipeline
Customization Service
Our factory supports full personalized customization of high alumina curved bricks:
- Customize arc radian, brick thickness, length and width based on customer’s kiln inner diameter;
- Adjust alumina content, bulk density and refractoriness according to actual working temperature and kiln atmosphere;
- Provide special surface treatment for scenarios with severe slag erosion;
- Supply supporting masonry drawings and technical guidance for on-site construction.
Why Choose Our High Alumina Curved Brick
We adopt automated batching and full-automatic tunnel kiln sintering process to ensure consistent physical and chemical indicators of each batch of products. Strict raw material inspection, semi-finished product testing and finished product third-party detection are implemented before delivery to avoid unqualified goods.
We have long-term cooperative experience with kiln manufacturers and industrial production enterprises from India, Southeast Asia and Middle East. We can match cost-effective grade solutions according to customers’ budget and service life requirements, and provide complete test reports, packing and sea transportation services to Mundra Port and other destination ports.
If you have demand for kiln renovation or new kiln construction, send us your kiln diameter, maximum working temperature and production medium parameters. Our professional refractory technical team will offer free tailored material recommendation and quotation support.
Send inquiry
Please Leave your message you want to know! We will respond to your inquiry within 24 hours!