Andalusite Bricks – Premium High-Alumina Refractory for High-Temperature Kilns

High Performance Andalusite Refractory Bricks with Superior Thermal Shock Resistance for Blast Furnace Hot Blast Stove & Cement Rotary Kiln

We supply high-purity fired andalusite bricks featuring high load softening temperature, low high-temperature creep and outstanding spalling resistance. Custom sizes & formulas for metallurgy, glass, cement and ceramic kilns. Factory direct supply, ISO certified.

Andalusite brick is a premium high-alumina refractory brick manufactured with natural high-purity andalusite mineral as the primary raw material, matched with mullite powder, sillimanite powder and high-quality bonding agents, then shaped by high-pressure pressing and sintered at ultra-high temperature above 1500℃.

Natural andalusite will steadily convert into stable needle-shaped mullite crystals when heated above 1350℃. This irreversible mineral transformation greatly improves the brick’s high-temperature strength, volume stability and anti-slag penetration capacity, making andalusite bricks far superior to ordinary high-alumina bricks in thermal shock resistance and high-temperature creep performance.

With low impurity content, low thermal expansion coefficient and stable chemical inertness against both acidic and weak alkaline slag, andalusite refractory bricks become the preferred lining material for industrial kilns that face frequent sharp temperature fluctuations and long-term high-temperature load conditions. We provide both standard straight andalusite bricks and custom special-shaped precast bricks to fit various furnace structural zones.

Low thermal expansion coefficient plus in-situ mullitization reaction effectively disperse thermal stress during repeated heating and cooling cycles. The bricks will not crack, peel or spall under drastic temperature changes, solving the biggest pain point of common high-alumina bricks in hot blast stoves and glass kilns.

The formation of dense mullite framework delivers high refractoriness under load, reaching 1450℃–1700℃. Even under long-term heavy load at constant high temperature, the brick body generates minimal deformation, extending the service life of furnace linings significantly.

Dense sintered structure restricts molten slag infiltration inside the brick matrix. It shows stable corrosion resistance to acid slag from cement kilns and weak alkaline slag in blast furnace systems, reducing lining thinning and local damage during continuous production.

High-pressure molding and full high-temperature firing ensure dense bulk density and high cold crushing strength. The brick maintains reliable flexural and compressive strength at service temperature, resisting abrasion and impact from hot airflow and materials inside kilns.

Compared with clay bricks and ordinary high-alumina bricks, andalusite bricks feature lower thermal conductivity, effectively reducing heat loss through furnace walls, cutting fuel consumption and lowering overall operation costs for factories.

Low content of harmful flux impurities such as iron oxide and alkali metal oxides. The brick will not react violently with most molten materials, flue gas and kiln atmosphere, supporting long-term stable operation without structural failure.

Andalusite bricks are widely applied in high-temperature equipment across metallurgy, building materials, glass and chemical industries.

Metallurgical Industry: Blast furnace hot blast stove lining, checker bricks, furnace dome and combustion chamber; torpedo ladle, iron ladle lining; soaking pit, heating furnace and electric arc furnace upper wall zones.

Cement Industry: Upper transition zone and safety zone lining of cement rotary kilns, applicable for both new dry-process and traditional rotary kilns.

Glass & Ceramic Industry: Glass melting kiln regenerator, ceramic tunnel kiln, shuttle kiln and high-temperature firing zone lining.

Other High-Temperature Equipment: Carbon calciner, waste incinerator, industrial boiler and various medium-temperature to high-temperature heat treatment furnaces with frequent temperature variation.

First, raw material screening: select low-impurity high-grade andalusite ore, strictly control Fe₂O₃ and alkali oxide content to guarantee high-temperature performance.

Second, precision batching & mixing: proportionally match andalusite aggregate, mullite fine powder and binder, fully knead under constant temperature to achieve uniform matrix structure.

Third, high-pressure hydraulic forming: large tonnage press compacts blanks to guarantee stable bulk density and dimensional accuracy.

Fourth, drying treatment: multi-stage slow drying to eliminate internal moisture and avoid cracking during high-temperature firing.

Fifth, high-temperature sintering: fire at 1500℃–1650℃ to complete mullitization reaction and form dense integrated brick structure.

Sixth, full performance inspection: test chemical composition, bulk density, cold crushing strength, refractoriness under load and thermal shock resistance for every batch before packaging.

Seventh, waterproof export packaging: moisture-proof wrapping and wooden pallet packing suitable for long-distance sea transportation.

Aluminum oxide content of finished andalusite bricks is controlled above 65%, with iron oxide impurity kept below 1.5%. The bulk density ranges from 2.30 g/cm³ to 2.70 g/cm³, cold crushing strength reaches 40–60 MPa. Refractoriness under load varies from 1450℃ to 1700℃ according to different grades, and long-term service temperature can reach 1550℃–1680℃. Products own outstanding volume stability with tiny permanent linear change after high-temperature treatment and extremely low high-temperature creep rate.

If you need durable anti-spalling lining bricks for hot blast stoves, cement rotary kilns or glass furnaces, our andalusite bricks are your cost-effective long-life solution.

You may send us your furnace type, maximum working temperature, slag composition and required brick dimensions. Our engineers will design a matched formula and provide free technical quotation. We also support sample supply for lab testing; contact us to confirm sample quantity and shipping arrangement.