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Silicon Mullite Fireclay Insulating Silica Refractory Bricks for stove

Silica Mullite Brick is a kind of refractory brick mainly composed of mullite andalusite silicon carbide and special grade homogenization alumina by high pressure shaping and high temperature firing.
Model Number: Hongtai
Certification: ISO9001
Minimum Order Quantity: 5 ton



Refractory Silica Mullite Bricks Fire Bricks Silicon Bricks

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Description of Silica Mullite Brick

Silica Mullite Brick is a kind of refractory brick mainly composed of mullite, andalusite, silicon carbide and special grade homogenization alumina by high pressure shaping and high temperature firing.

Silica Mullite Brick is with good high temperature resistance, wear resistance, corrosion resistance, low thermal conductivity, low energy consumption, etc. Currently, it covers the cooling zone and transitional zone of most cement kilns. Silicon mullite brick is of not only good thermal vibration performance, but also suitable thermal conductivity for cement kiln operation.

According to client's feedback, the temperature requirement outside cement kiln isn't more than 320ºC, but the tested temperature of silicon mullite brick is only 250~280ºC after using, which reduces the surface temperature of kiln shell significantly and energy consumption. Silicon mullite brick is also of very good thermal resistance, its refractoriness under load can reach 1600ºC, but for carrier in cement kiln is normally about 1400ºC, there won't be any problem after reusing for one year. It's also of good wear resistance which fully meets the international standard of refractory material.

Application of Silica Mullite Brick

Silica Mullite Brick is widely used in decomposition zone and preheating zone of dry cement kiln, high wear parts of grate cooler and other parts scoured by rapid wind. It's of strong allocation adaptation. For traditional refractory allocation, spinel brick, magnesia-chromite brick, anti-stripping brick and other refractories of different performances are normally allocated in kilneye, former transitional zone, latter transitional zone and decomposition zone separately while silicon-mullite brick can cover all the craft zones except firing zone.


Technical performance of Silica Mullite Brick






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Product Features

1. wear resistance-Silica Mullite Brick
Silica Mullite Brick main crystalline phase of the silica brick consists of silicon carbide having a high hardness (Mohs hardness of 9.0 to 9.5), mullite (Mohs hardness of 7.0 to 7.5), and corundum (Mohs hardness of 9.0 to 9.2). The product has high density and the bulk density is above 2.7g·cm-3. The normal temperature wear resistance of the refractory material depends on its strength and compactness of the structure, and the material with high strength and high density has good wear resistance. The lining of cement rotary kiln is subject to rolling friction of materials for a long time, and wear is one of the main reasons for the damage of refractory lining. The density, strength and wear resistance of silica bricks are significantly better than those of high alumina bricks and magnesium aluminum spinel bricks. It has a good effect in the secondary firing zone and transition zone of the cement rotary kiln. It can be said that the wear resistance plays an important role.

2. high temperature performance-Silica Mullite Brick
Silica Mullite Brick  The load softening temperature of silica brick is above 1500 °C, and some are as high as 1690 °C, which can completely resist the high temperature impact in the kiln, no softening and no deformation.
Different grades of silica bricks have different load softening temperatures and different application points. The secondary firing zone or the upper and lower transition zone, the temperature reaches 1400~1450 °C, which is higher than the brick surface temperature of the firing zone (the blasting zone is lined with kiln skin protection, the brick surface temperature is 900~1000 °C), so the silicon brick is selected. Grade 1650, while seat belts, disintegration belts or cooling belts are cooler, with a choice of 1600; pre-tropical or split belts with a choice of 1550 silica bricks. The load softening temperatures of these silica bricks are significantly higher than the high alumina bricks that are often used.

3. anti-flaking and thermal shock stability-Silica Mullite Brick
Silica Mullite Brick is known to all, the temperature of the cement rotary kiln varies greatly, frequently shutting down the kiln for repair or handling accidents, and the lining is subject to severe temperature fluctuations. Silicone brick contains certain SiC, SiC has high thermal conductivity and relatively small thermal expansion coefficient, which makes the product's hot vine stability significantly improved. The water temperature test at 1100 °C is more than 10 times, up to 46 times, so the silica mullite brick is in The use of cement rotary kiln does not peel off, does not break, significantly improves the service life.

4. thermal insulation performance-Silica Mullite Brick
Silica Mullite Brick is used in the transition zone of the cement rotary kiln, due to the high thermal conductivity, increases the heat loss and affects the life of the kiln. It causes the kiln to be shut down for 2-3 times a year and replace the refractory material. The thermal conductivity of silica mullite brick [≤2.3W·(m·K)] is lower than that of spinel brick, so the thermal insulation effect of silica brick is better. In the large rotary kiln firing zone, transition zone, cooling zone, pre-tropic zone, decomposition zone and other parts, the surface temperature of the silica mullite brick is lower than 100 ° C than the temperature of the cylinder using the spinel brick

Production Equipment

Production capacity: Our factory actively response to government environmental protection policy, we designed and built the fully automatic controlled high temperature gas tunnel kiln (1700℃), and got capacity of annual output 70,000 tons of high quality refractory products.

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Packing Details
Packing details:

★Bricks: Fumigated wooden pallet with log paperboard covered and stainless steel band strapping, the whole outside is wrapped with thermoplastic film. Or carton packaging.

★Wooden pallet size: usually 92*92cm (standard brick)

★Castable: Ton bag with rain film and 25kg bags inside

★Or according to customer’s requirements


★Port of dispatch: Tianjin port; Qingdao port

★Delivery time: According to customer’s demand or two sides negotiate

Our Services

We provide you 

★Timely response: Timely response to your inquiry within 24 hours and provide solution. 

★Competitive Price: Make the products competitive in your market. 

★Free sample: Free sample are offered, trial order are accepted for quality evaluation. 

★Strict quality control: We set Quality Management System, from the raw material to finished products, produce high quality products according to chemical & physical specifications strictly to satisfy customers’ needs.

★Fast delivery time: Within 3-30 days according to your quantity after receiving your advance payment. 

★ Professional services: Provide pictures from order to delivery. Inspect report by our country’s designated authority and oversea services if necessary.

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Certification:  (ISO 9001:2015)



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