Zhengzhou Annec Industrial Co., Ltd.
Continuously Pushing Forward R& D of HBS for BF and Progress of Refractory Technology To Become Preferred Global Supplier in High Temperature Industry
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Description for Silica Insulating Bricks
Silica Insulation Bricks are produced with silica through adding inflammable substances such as coke, anthracite coal, sawdust, and carbonized rice husk, or foaming agents to form porous structure. Generally add 35-45% anthracite coal or 30% coke as inflammable substances. Since there are Fe2O3 and Al2O3 in the ash of coke and anthracite coal, there is no need to add iron scales. Silica Insulation Brick’s main mineral composition includes 78%~86% tridymite, 13%~15% cristobalite and 4%~7% quartz. Its cold crushing strength is 2.0-5.9MPa, thermal conductivity is 0.35-0.42W/(m•K) and density is 0.9-1.1g/cm3.
| Silica Insulating Brick | ||||
| Item | PSB | |||
| SiO2(%) | ≥90 | |||
| Expansion, 1000℃ | 1.1~1.3 | |||
| Refractoriness Under Load,0.1MPa(℃) | ≥1500 | |||
| Bulk Density (g/cm3) | ≤1.15 | |||
| Cold Crushing Strength (MPa) | ≥5.0 | |||
| Permanent Linear Change(%) | ±0.5 | |||
| Thermal conductivity(350±25)℃ (W/mK) | ≤0.65 | |||
Silica insulating bricks Properties
1. Good thermal conductivity;
2. Strong high temperature mechanical strength;
3. High temperature stable volume change;
4. Small residual swell;
5. Strong acid-resistant slag erosion;
6. Light weight and Eco friendly;
7. Good thermal shock resistance;
More information about us
Q1.Are you Manufacturer?
A:Yes, of course, our factory is in Xinmi,zhengzhou city,Henan province.
Q2.Can we visit your company?
A:Sure,welcome at any time,seeing is believing.