Silica Brick

Silica brick is made of quartz stone material, the content of SiO2 is above 93%, it has good resistance to acid slag and good heat conductivity. And the refractoriness is 1690~1710°C, RUL is beyond 1620°C.


SiO2 has different types of crystals in different temperatures, and the transform between the crystals will cause the change of the bulk. So there is close contact between the changes of SiO2 crystals and the produce, performance, and usage of silica bricks. During the heating, there will be changes of the bulk, and cristobalite changes most, then quartz, phosphorus quartz is the slowest of all and it also has good heat conductivity. Coke oven should use silica brick with small true density. And the phosphorus quartz is better than others.

Application For Silica Brick

Mainly used in the construction of regenerative chamber, chute, combustion chamber, cooking chamber, furnace roof, etc. parts of the coke ovens. Silica Brick For Glass Kiln Mainly used for coke oven of coking chamber and combustion chamber partition, steel open hearth of the regenerative chamber and sediment chamber, soaking furnace, glass melting furnace, refractory silica brick materials, and ceramic firing kiln and kiln of the vault and other supporting parts. Also used in hot blast stove of high temperature bearing parts and acid open hearth furnace roof.

Advantage For Silica Fire Brick

1) Silicon oxide is above 95%.
2) Good acid erosion resistance.
3) High softening point with temperature.
4) No shrink in burn repeatedly.
5) Temperature of refractoriness under load is above 1650º C

Stable Capability, High Quality, Excellent Service, Competitive price is the most important advantage of our products.

Physical and Chemical Indicators

Item Silica brick

for coke oven

Silica brick

for glass kiln

Furnace bed others BG-96A BG-96B BG-95A BG-95B
SiO2% ≥ 94 96 96 95 95
Fe2O3 %≥ / 0.8 1.0 1.2 1.2
0.2MPa RUL°C ≥ 1650 1680 1670 1660 1650
FUSION INDES:

one BRICK<20kg

one BRICK ≥20kg

/
/
0.5
0.6
/
/
0.7
0.7
/
/
True density g/cm3 ≤  2.34       2.35 2.34
PLC % 1450°C×2h +0.2        0 /
AP % ≤ 22(23) 24 22(24)
Thermal expansion

1000°C % ≤

1.28 1.30 /
CCS  MPa ≥
one brick<20kg
one brick≥20kg
30 25 35(30)
30(25)

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