Product Characteristics of Mullite Insulation Brick for Sales

The mullite insulation brick is a high alumina refractory material mainly composed of mullite (3Al2O3·2SiO2). Generally, the alumina content is between 65% and 75%. In addition to mullite, the mineral composition contains a small amount of glass phase and cristobalite, and a higher amount of alumina also contains a small amount of corundum. The mullite insulation brick can be directly used for lining of high temperature kiln, and has been widely used in the lining of shuttle kiln, roller kiln, glass and petrochemical kiln.

 

The performance and application of mullite insulation bricks: high refractoriness, up to 1790 °C. The load softening start temperature is 1600 to 1700 °C. Normal temperature compressive strength is 70 to 260 MPa. Good thermal shock resistance. There are two kinds of sintered mullite bricks and electric fused mullite bricks. The sintered mullite brick is made of high alumina bauxite clinker as a main raw material, and a small amount of clay or raw bauxite is added as a binder, which is formed by molding and firing.

The electric melting mullite brick is made of high alumina, industrial alumina and refractory clay, and is added with charcoal or coke fine particles as a reducing agent, and is formed by reduction electrofusion after molding. The crystal of fused mullite is larger than sintered mullite, and the thermal shock resistance is better than that of sintered products. Their high temperature performance depends mainly on the alumina content and the uniformity of the mullite phase and glass distribution. Mainly used in hot stove top, blast furnace body and furnace bottom, glass furnace regenerator, ceramic sintering kiln, oil cracking system dead angle lining.

 

Production process of mullite lightweight insulation brick

The current grouting molding method is commonly used for the production of lightweight mullite insulating bricks. After natural curing to demoulding, it is moved into a forced drier to be dried, and then fired at a high temperature, and the fired body is mechanically polished to be a finished product. 

 

When choosing mullite lightweight insulation bricks, it is also necessary to consider the cost performance of two kinds of mullite bricks, such as sintered mullite bricks and fused mullite bricks. According to the actual situation of the kiln, choose the most suitable furnace. Mullite insulation bricks. If you would like more information about mullite insulation bricks, please contact Sunrise Refractory Company and we will serve you sincerely.