Silica Mullite Bricks

Mullite bricks refer to high-alumina refractories with mullite as the main crystalline phase, and the general alumina content is between 65% ~ 75%. It is mainly used for hot blast furnace top, blast furnace body and bottom, glass melting furnace regenerator, ceramic sintering kiln, petroleum cracking system dead angle furnace lining, etc.
Mullite bricks have high refractoriness, up to more than 1790 C, and have good thermal shock resistance. There are two types: sintered mullite bricks and fused mullite bricks. The crystallization of fused mullite is larger than that of sintered mullite, and the thermal shock resistance is better than that of sintered products.
Aluminum content: 65-90%
Standard brick size: 230*115*65mm
Compressive strength at room temperature: 100-120MPa
Good thermal shock resistance:

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With the breakthrough of the suspension preheating and pre-decomposition technology in the cement industry and the increasing size of the equipment, the heat load of the kiln is significantly increased, the rotation speed is accelerated, the alkali corrosion is severe, and the lining life and equipment operation cycle are shortened, thus the requirements for refractory materials. More demanding.
Its performance advantages are mainly manifested in: 1. High refractoriness under load and excellent high temperature resistance; 2. High strength, abrasion resistance, and easy to peel off and erosion; 3. Low thermal conductivity and good heat insulation effect; 4. Strong flexibility and heat resistance Excellent seismic performance; 5, moderate density, reduce the cylinder load.

Custom Made Shapes Of High Alumina Bricks, Mullite Bricks

Silica bricks are the main species of silica-based refractories, where the mass fraction of sio2 is not less than 93%. Silica brick is a typical acid refractory bricks, the acid slag has a good resistance to al2o3, feo, fe2o3 and other oxides also has good resistance, but the resistance to alkaline slag is poor, easy to cao, k2o, na2o and other oxides and damage. Silicone brick softening temperature as high as l640-1680 â??, long-term use at high temperatures more stable. But the thermal resistance of silicon brick is poor, refractoriness is not high enough.

Descriptions:
Mullite bricks have the properties of high purity, good mechanical strength, high refractoriness under load and low thermal conductivity. Mullite bricks are the best suited for reducing atmospheres and have resistance to slag and alkali attack. It has superior resistance to abrasion and thermal shocks. The effect on energy saving is significant.

Applications:
It is the ideal to be used as both insulating linings and working linings of high temperature kilns like glass tank furnace, kiln furnitures for firing ferrites, high alumina ceramics, carbon black reactor, cement kiln, burner blocks.

Mullite Brick is a refractory material characterized by excellent performance (especially high temperature creep performance), is made from pure mullite and also alumina powder is added according to different types, finally sintered at high temperature.
The features of our mullite bricks are with high mechanical intensity; high refractoriness, contact with flame directly; high porosity, low volume density, low thermal conductivity; low creep rare at high temperature, good thermal shock stability; chemical corrosion resistance and long service life.

Mullite lightweight brick

It was made of mullite and other fine raw refractory materials with advanced techniques. It is a kind of new popular energy-saving material widely used in metallurgy, ceramics, glass and chemical industry, glass and chemical industry as high temperature liner, such as in pyrolyzers, chemical industry furnace, metallurgy industry furnace, heating furnace, electric resistance furnace, roller kiln, tunnel kiln and shuttle kiln.

Description
Mullite insulation bricks are high alumina refractories mainly made from good quality and pure raw materials.In generally, alumina accounts 65%-75%. Besides mullite,there are also glass phase and christobalite as well as corundum which are good grade fillings. Mullite insulation bricks are widely used for lining in high temperature kilns such as shuttle kiln,roller kiln,glass kiln and petroleum kilns.

Specifications
1.Low thermal conductivity, good heat insulation.
2.Low thermal melting point. Lightweight mullite insulating bricks save heat and energy.
3.Low impurity content,high temperature resistance; higher alumina content ensures good performance.
4.Customized shapes to reduce bricks quantity and cost.
5.Dense,compact and accurate structure,low porosity rate.
6.High loading temperature,corrosion resistance.

Application
Due to its lightweight and good insulating performance,our mullite insulation bricks has broad use for fire resistance lining in heat side and insulating layers, thus increases energy efficiency greatly. Mullite lightweight bricks are popular in hot blast kiln crown,flame side and bottom parts; glass melting furnace regenerator,ceramic sintering kiln,Petroleum cracking system corners and linings,ethylene pyrolysis furnaces, tubular furnaces, reforming furnaces of synthetic ammonia, gas generators and high-temperature shullte kilns, etc.