Fire clay Brick

Local materials

cheap,durable

fireproof, heat insulation

sound insulation

moisture absorption

  Description

Fireclay brick is also called chamotte brick. It is acidic firebrick. The higher SiO2 content, the stronger acid corrosion resistance. Fireclay brick has certain degree of acid slag corrosion resistance, but its alkaline slag corrosion resistance is not good. Therefore, fireclay brick is usually used as acidic kilns inner lining. The main applications of fireclay  bricks are blast furnace, hot blast furnace, glass furnace, carbon furnace, etc. 

  Technical Data:

Blast Furnace Fireclay Bricks Physicochemical Index

Item

GNZ-42a

GNZ-42b

Al2O3%

42

42

Fe2O3 % ≤

1.7

1.7

Refractoriness ℃

1750~1770

1750~1770

RUL 0.2 Mpa ℃ ≥

1450

1430

Reheating linear change(1450℃, 3h)

0~-2

0~-3

Apparent porosity%

≤15

≤16

Cold compression strength Mpa ≥

58.8

49.0

Hot Blast Furnace Fireclay Bricks

Hot blast furnace fireclay bricks have good thermal shock resistance, high refractoriness under load temperature, low creep rate . They are mainly used in regenerators, partition wall and so on.

Hot blast furnace clay bricks physicochemical index

Item

RN-42

RN-40

RN-36

Al2O3% ≥

42

40

36

Refractoriness ℃

1750~1770

1730~1750

1690~1710

RUL 0.2 Mpa ℃ ≥

1400

1350

1300

Reheating linear change

(1450℃, 3h)0~-0.4

(1350℃, 3h)0~-0.3

(1350℃, 3h)0~-0.5

Apparent porosity%

≤24

≤24

≤25

Cold compression strength Mpa ≥

29.4

24.5

19.6

 

Glass Kiln Fireclay Blocks

Glass kiln fireclay block’s unit weight is no less than 50 kg.

Glass Kiln Fireclay Blocks Physicochemical Index

Item

GCB-40a

GCB-40b

Al2O3% ≥

40

40

Fe2O3 % ≤

1.5

1.8

RUL 0.2 Mpa ℃ ≥

1450

1400

Reheating linear change(1400℃, 2h)

0~-0.4

0~-0.4

Apparent porosity%

≤18

≤18

Cold compression strength Mpa ≥

49

34.3

 

  Application:

Fireclay Bricks Applications

Fireclay bricks is the most widely used firebricks with the largest output in  the world. They are used to build working lining and permanent linings of various kinds of thermal equipment and kilns. For example, fireclay bricks are widely used in blast furnace,  hot blast furnace, glass furnace, etc.

Blast furnace fireclay bricks are mainly used at small blast furnace throat, furnace bosh, furnace hearth and furnace bottom, large blast furnace bosh. Blast furnace fireclay bricks have high cold crushing strength, long term furnace load wear resistance, small volume shrinkage at high temperature working condition, so furnace lining integrity can be kept. Besides, blast furnace fireclay brick should have low apparent porosity, low Fe2O3 content, so carbon won’t deposit in pores. 

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