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General refractory bricks for carbon roasting furnace
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General refractory bricks for carbon roasting furnace

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Detail

Item

Unit

N-1

N-2a

LZ-75

LZ-65

LZ-55

Al2O3

%

≥42

≥42

≥75

≥65

≥55

Fe2O3

%

 

 

 

 

 

Apparent porosity ,AP             

%

 

 

 

 

 

Normal temperature compressive strength ,CCS          

Mpa

≥30

≥25

≥53.9

≥49

≥44.1

Softening onset temperature at 0.2 MPa load,RUL 

≥1400

≥1350

≥1520

≥1500

≥1470

Reburning line change rate PLC

1500℃×2h

%

 

 

0.1~-0.4

0.1~-0.4

0.1~-0.4

1400℃×2h

0.1~-0.4

0.1~-0.5

 

 

 

Fire resistance
Refractoriness 

≥1750

≥1730

≥1790

≥1790

≥1770

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General refractory bricks for carbon roasting furnace
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