Silicon oxide brick

Silica Bricks is made from quartz stone materials with …

Composition: SiO2>=92% Refractoriness: 1790℃

B.D.:>2.3 g/cm3

Color: yellow

Max service temp: 1600℃

Application: Hot blast furnace

Capacity: 100 tons/day

Package: wooden pallet

Product Overview

Silica Bricks is made from quartz stone materials with SiO2 content  above 92%;the more SiO2,the higher refractoriness. Al2O3,TiO2 etc impurity amount is under 2%. Silicon oxide brick is a kind of acid refractory material, has good performance to resistant acid slag, but it not resistant to alkali slag.


  • Acid,erosion and slag resistance.
  • refractoriness under load at 1620-1680°C
  • Refractoriness 1690-1730°C.
  • True density  2.3-2.4 g/cm3

Because silica oxide brick, with poor thermal shock resistance, should not be used for rapid temperature ranges.


1.Coke oven, blast furnace hot blast furnace, copper smelting furnace, glass smelting kiln furnace, electric furnace roof.

2.Regenerative chamber wall, chimney flue, combustion chamber, coking chamber, furnace roof etc. parts of the coke ovens.

3.Hot blast stove/furnace of dome, furnace wall and checker brick.

4.Steel open hearth of regenerative chamber and sediment chamber, soaking furnace, glass melting furnace and ceramic firing kiln etc.


Silicon Oxide Brick BG-96A BG-96B BG-95 BG-94
SiO2 ≥96 ≥96 ≥95 ≥94
Fe2O3 ≤0.8 ≤0.7 ≤1.5 ≤1.5
Al2O3+TiO2+R2O ≤0.5 ≤0.7 ≤1.0
Refractoriness ℃ 1710 1710 1710 1710
Apparent Porosity% ≤21 ≤21 ≤21 ≤22
Bulk Density g/cm3 ≥1.8 ≥1.8 ≥1.8 ≥1.8
True Density,g/cm3 ≤2.34 ≤2.34 ≤2.38 ≤2.38
Cold Crushing Strength Mpa ≥35 ≥35 ≥29.4 ≥24.5
0.2Mpa Refractoriness Under Load T0.6 ℃ ≥1680 ≥1680 ≥1650 ≥1630
Permanent Linear Change On Reheating (%)1500℃X2h 0~+0.3 0~+0.3 0~+0.3 0~+0.3
20-1000℃ Thermal Expansich10-6/℃ 1.25 1.25 1.25 1.25
Thermal Conductivity (W/MK) 1000℃ 1.44 1.44 1.74 1.74


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