Silica Brick
Low bulk density
Low thermal conductivity
High apparent porosity
Good thermal shock resistance
Great high temperature mechanical strength
High temperature stable volume change
Strong acid slag erosion resistance
Application: Silica refractory brick can be widely used to build all kinds of refractory linings for kilns and furnaces.
Brief Description
Silica brick adopts silica as the raw material and lime milk, iron-phosphorus and sulfite lye as the binding agent and mineralizer, are manufactured through firing in the high temperature and go through strong chemical and mechanical erosion. Silica brick is a kind of acid refractory with over 93% SiO2 content and 2.35g/cm3 true density, which has various features of low volume expansion, excellent high-temperature strength, strong acid slag erosion resistance, And the refractoriness is 1690~1710°C,RUL is beyond 1620°C.
Technical Specification Of RongSheng Silica Brick
| Item | BG-94 | BG-95 | BG-96A | BG-97B | |
| Chemical Composition % | SiO2 | ≥94 | ≥95 | ≥96 | ≥96 |
| Fe2O3 | ≤1.5 | ≤1.5 | ≤0.8 | ≤0.7 | |
| Al2O3+2(K2O+Na2O) | ≤1.0 | ≤0.5 | ≤0.7 | ||
| Refractoriness ℃ | 1710 | 1710 | 1710 | 1710 | |
| Apparent Porosity % | ≤22 | ≤21 | ≤21 | ≤21 | |
| Bulk Density g/cm³ | ≥1.8 | ≥1.8 | ≥1.87 | ≥1.8 | |
| True Density g/cm³ | ≤2.38 | ≤2.38 | ≤2.34 | ≤2.34 | |
| Cold Crushing Strength Mpa | ≥24.5 | ≥29.4 | ≥35 | ≥35 | |
| Refractoriness Under Load (0.2MPa)T0.6℃ | ≥1630 | ≥1650 | ≥1680 | ≥1680 | |
| Permanent Linear Change On Reheating % 1500℃X2h | 0~﹢0.3 | 0~﹢0.3 | 0~﹢0.3 | 0~﹢0.3 | |
| Thermal Conductivity W/m.k 1000℃ | 1.74 | 1.74 | 1.44 | 1.44 | |
| 20-1000℃ Thermal Expansion 10-6/℃ | 1.25 | 1.25 | 1.25 | 1.25 | |
Advantages
Silicon oxide is above 95%
Good acid erosion resistance
High softening point with temperature
No shrink in burn repeatedly
Temperature of refractoriness under load is above 1650º C
Great high temperature mechanical strength
High temperature stable volume change
Good thermal shock resistance property
Application
Mainly used for coke oven of coking chamber and combustion chamber partition, steel open hearth of regenerative chamber and sediment chamber, soaking furnace, glass furnace, refractory silica brick materials and ceramic firing kiln and kiln of vault and other supporting parts. Also used in hot blast stove of high temperature bearing parts and acid open hearth furnace roof.
Mainly used in the construction of regenerative chamber, chute, combustion chamber, coking chamber, furnace roof etc.
parts of the coke ovens and Silica Brick For Glass Kiln.
