Light Weight Silica Insulation Brick
What is Light Weight Silica Insulation Brick
Light weight silica insulation brick is a kind of light weight insulation bricks with over 91% silica content and less than 1.2g/cm3 density, also called Light Weight Silica Brick, is a kind of light weight refractory materials with more than 91% silicon dioxide and less than 1.2g/cm3 bulk density. Its refractoriness and refractoriness under load have hardly difference with common silica bricks that with the same composition. As there is much porosity, the compression strength, slag resistance and corrosion resistance are inferior to common silica refractory bricks.
Process of Light Weight Silica Insulation Brick
Light weight silica insulation brick adopt finely-divided silica ore as the raw material. Its critical particle size is not more than 1mm, therein more than 90% particle size is less than 0.5mm. Light Weight Silica Brick is made by adding flammable substance in the burdening or adopting gas bubble method to produce porous structure through firing. It also can be made to be unburned product. Light Weight Silica Brick is mainly used for each position of kilns that require insulation or lightening self-weight but without directly contact with melt, without gas erosion and heat shock resistance. Lightweight Silica Insulation Bricks can be used in high temperature but cannot contact with basic refractory. According to the different of materials structure, its highest service temperature is 1200~1550℃.
Light Weight Silica Insulation Brick Features
.Small residual swell
.Strong acid-resistant slag erosion
.Light weight and Eco friendly
.Good thermal shock resistance
.Good thermal conductivity
.Strong high temperature mechanical strength
.High temperature stable volume change
Specifications of Light Weight Silica Insulation Brick
| Light Weight Silica Insulation Brick | |||||
| Item/Index | RS-0.8 | RS-1.0 | RS-1.1 | RS-1.15 | RS-1.2 |
| SiO2 % | ≥88 | ≥91 | ≥91 | ≥91 | ≥91 |
| Bulk Density g/cm3 | ≤0.85 | ≤1.00 | ≤1.10 | ≤1.15 | ≤1.20 |
| Cold Crushing Strength Mpa | ≥1.0 | ≥2.0 | ≥3.0 | ≥5.0 | ≥5.0 |
| Thermal Conductivity (W/MK) 350℃ | 0.55 | 0.55 | 0.60 | 0.65 | 0.70 |
| Permanent Linear Change On Reheating (%) 1450℃*2h | 0~+0.5 | 0~+0.5 | 0~+0.5 | 0~+0.5 | 0~+0.5 |
| 0.2Mpa Refractoriness Under Load T0.6℃ | ≥1400 | ≥1420 | ≥1460 | ≥1500 | ≥1520 |
| 20~1000℃ Thermal Expansion 10.6/℃ | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 |
Light Weight Silica Insulation Brick Application
Light weight silica insulation brick can be used in the glass furnace and hot blast stove, which can be classified into two grades, one is used for the roof of reheating furnaces and Portland industrial furnaces and can directly contact with the flame, another one is used for the common industrial furnaces. Light weight silica insulation brick also can be used in Coke ovens, Carbon forging furnace and any other industrial furnaces.