• Silica Brick

Product Description And Parameters

Composition:SiO2

Application:Coke oven, hot blast stove, glass kiln, etc

SiO2:≥94%

Stanard size:230*114*65mm

Raw Material:Quartz sand

Refractoriness:≥1790℃

Silica brick is an acid refractory material composed of tridymite, cristobalite and a small amount of residual quartz and glass phase. Silica bricks have good resistance to acid slag erosion. The refractoriness under load is as high as 1640~1670℃, and the volume is relatively stable under high temperature for long-term use.

Features
1.Good resistance to acid slag erosion.
2.High strength at high temperature.
3.Little dimensional change when using at high temperature for a long time.

Application
It is mainly used for the chamber and combustor of coke oven, regenerator chamber and cinder chamber of steelmaking open hearth furnace, soaking pit, refractory material of glass melting furnace, vault and other load-bearing parts of ceramic kiln .It is also used for high temperature load bearing parts of hot blast furnace and roof of acid open hearth furnace.

Item

KN

KD

KS

Testing In Accordance With

Regenerator

Boiler Wall

Carbonization Chamber Bottom

Boiler Wall

Oven Roof

ChemicalComposition

SiO2

%  μG

≥94.5

≥95.0

DIN51070

σ

1.0

1.0

Part 26

Al2O3

%  μG

≤2.0

≤1.5

DIN51070

σ

0.3

0.3

Part 36

Fe2O3

%  μG

≤1.0

≤1.0

DIN51070

σ

0.2

0.2

Part 56

CaO

%  μG

≤3.0

≤3.0

DIN51070

σ

0.35

0.35

Part 76

Na2O+K2O

%  μG

≤0.35

≤0.35

DIN51070

σ

0.02

0.02

Part 86

Residual Quartz Content1)

Raw Materials Type A(Coarse Crystalline)

%  μG

As Per Mutual Agreement

(2)

σ

6.0

xmax

 

Raw Materials Type B(Crypto Crystalline)

%

1.5

-

0.5

-

Cold Compressive Strength

N/mm2μG

≥282

≥35

≥45

DIN51067 Part 1

σ

10

10

10

xmin

20

25

30

Apparent Porosity

%    μG

≤24.5

≤22.0

≤22.0

DIN51056

σ

1.3

1.3

1.3

Refractoriness Under Load Initial Temperature ta

℃   μG

≥1640

≥1650

DIN51064

σ

25

25

Refractoriness Under Load T0.5℃ (Differential Method)

℃   μG

According to Agreements

DIN51053

σ

Part 1

Compressive Creep 3

%   μG

≤0.12

-

DIN51053Part 2

σ

0.05

%    μG

≤0.35

σ

0.1

-

 

Refractoriness 4)

SK  μG

≥170(SK31)5)

-

-

DIN51063Part 1

σ

2(SK1)5)

Average Thickness Loss

mm  μG

-

-

≤4.5

DIN52108

σ

0.1

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