IndexItem

CL－55

CL－65

CL－75

CL－80

PZCL－78

Bottom brick

Wall brick

AL2O3, %

≥55

≥65

≥75

≥80

≥78

≥68

≥60

MgO , %

/

/

/

/

/

≥10

≥15

Fe2O3, %

/

/

/

≤2.0

≤2.0

/

/

0.2MPa load softening start temperature rul, ℃

≥1470

≥1490

≥1510

≥1530

≥1550

/

/

Reburning line change rate PLC,%

1450℃×2h

0.1～0.5

/

/

/

/

/

/

1500℃×2h

/

0.1～0.5

0.1～0.5

/

/

/

/

1550℃×2h

/

0.1～0.5

0.4～0.3

/

/

Apparent porosity AP,%

≤22

≤28

≤28

≤24

≤21

≤8

≤8

bulk densityBD , g/cm3

/

/

/

/

/

≥3.0

≥3.0

Normal temperature compressive strengthCCS，Mpa

≥45

≥35

≥40

≥50

≥70

≥55

≥50