Rongsheng Silica Insulating Refractory Bricks are insulating siliceous refractory products with SiO2 content of more than 90% and a bulk density less than 1.2g/cm3. Silica Insulating Refractory Bricks are generally made of crystalline quartzite or silica sand as raw materials and flammable substances are added to the ingredients. Such as coke, anthracite, sawdust, carbonized rice husks or gas foaming method to form a porous structure. Rongsheng Silica Insulating Refractory Bricks Sales, Contact Rongsheng and get detailed information for free.

Ingredients of Silica Insulating Refractory Bricks

The production process of Silica Insulating Refractory Bricks is similar to that of ordinary silica bricks. Some mineralizers (CaO, Fe2O3) are added to the ingredients to promote the transformation of quartz, and pulp waste liquid is used as a binder to give the bricks a certain strength. When coke or anthracite is used as a combustible additive, since the ash will bring in Fe2O3 and Al2O3, there is no need to add iron scale to the ingredients. When Silica Insulating Refractory Bricks are fired, a strong oxidizing flame should be maintained before 1200℃ to completely burn out the additives.

Physical and Chemical Indicators of Silica Insulation Refractory Bricks

The mineral composition of silica insulation refractory bricks is: tridymite 78%~86%, cristobalite 13%~15%, and quartz 4%~7%. The volume density of general silica insulation refractory bricks is 0.9~1.1 g/cm3, the compressive strength is 2.0~5.9 MPa, and the thermal conductivity is 0.35~0.42 W/(m·K). Technical indicators of silica insulation refractory bricks for industrial furnaces. Physical and chemical indicators of Rongsheng silica insulation refractory bricks.

Performance and Application of Silica Insulation Refractory Bricks

Silica insulation refractory bricks have excellent refractory properties, and the load-softening temperature is close to that of dense silica bricks, reaching above 1620℃. There is only a small amount of residual expansion, and its thermal stability is better than that of dense silica bricks. Therefore, silica insulation refractory bricks can be used for a long time under high temperature conditions (1500~1550℃) without contact with slag. But it is particularly suitable for the insulation material of silica brick lining of high-temperature hot blast furnaces in large blast furnaces and the insulation of silica brick masonry in glass kilns.

The silica insulation refractory bricks produced by Rongsheng are divided into one and two grades. The first grade can be used for the top of steel rolling heating furnaces and the top of silicate industrial kilns, and can directly contact the flame. The second grade is used for the insulation of general industrial kilns.

Rongsheng Lightweight Insulating Refractory Brick Manufacturer

Rongsheng Refractory Material Manufacturer is a powerful manufacturer and seller of refractory materials. Rongsheng Factory is committed to providing high-quality refractory lining materials for high-temperature industrial furnaces. In addition, our refractory insulation materials can also help companies reduce energy consumption and save production costs. Rongsheng lightweight insulating refractory bricks include lightweight high-alumina bricks, lightweight silica bricks, mullite insulation bricks, Rongsheng high-strength nano insulation bricks, insulation boards, etc. If you need insulation bricks, silica insulation refractory bricks, lightweight high-alumina bricks, or lightweight clay bricks, please Contact Rongsheng. Get free samples and quotes.