Refractory Silica Brick

General silica brick: Siliceous refractory products used for various large coke oven, glass kiln stove, hot air stove, etc.

Item

GZ-96

GZ-95

GZ-94

SiO₂   % ≥

96

95

94

Fe₂O₃  % ≤

1.0

1.2

1.4

Refractoriness °C ≥

1710

1710

1690

Apparent porosity % ≤

22

22

24

Cold crushing strength  Mpa  ≥

29.4

24.5

19.6

Refractoriness under load, 0.2MPa, °C ≥

1660

1650

1640

True density  g/cm3 ≤

2.34

2.35

2.35

Silica brick for Hot-blast stove

Item

Dome wall brick

Checker

SiO₂   % ≥

95

95

Cold crushing strength  Mpa  ≥

35

30

Apparent porosity % ≤

22

23

Creep rate(0.2MPa,1550°C,50h)% ≤

0.8

0.8

True density  g/cm3 ≤

2.35

2.35

Thermal expansion(1000 °C)% ≤

1.26

1.26

Silica brick for Glass kiln

Item

BG-96A

BG-96B

BG-95A

BG-95B

SiO₂   % ≥

96

96

95

95

Fe₂O₃  % ≤

0.8

1.0

1.2

1.2

Apparent porosity % ≤

22

22

22

22

Refractoriness under load, 0.2MPa, °C ≥

1680

1670

1660

1650

True density  g/cm3 ≤

2.34

2.34

2.35

2.35

Cold crushing strength  Mpa  ≥

30

30

30

30

Silica brick for coke oven

Item

Furnace bottom,Furnace wall

Other

SiO₂   % ≥

94

94

Cold crushing strength  Mpa  ≥

30

25

Apparent porosity % ≤

22.

24

Refractoriness under load, 0.2MPa, °C≥

1650(Cementation silica 1620)

1650(Cementation silica 1620)

Permanent linear Change  1450 °C,2h ≤

0—+0.2

0—+0.2

True density  g/cm3 ≤

2.34

2.35

Thermal expansion(1000 °C)% ≤

1.28

1.30