Project indicators

Corundum spinel

High aluminum spinel

GNGJ-1

GNGJ-2

GNGJ-3

GNGJ-4

GNGJ-5

Al2O3,%

≥90

≥85

≥80

≥70

≥65

MgO,%

≤5

≤6

≤8

≤8

≤10

bulk density,g/㎝3

110℃×24h

≥3.0

≥2.90

≥2.80

≥2.70

≥2.60

Flexural strength,MPa

110℃×24h

≥6

≥6

≥6

≥6

≥6

1500℃×3h

≥10

≥10

≥10

≥9

≥8

Compressive strength,MPa

110℃×24h

≥ 30

≥ 30

≥ 30

≥ 30

≥ 30

1500℃×3h

≥80

≥75

≥70

≥50

≥45

Long term rate of change,%

0～+1.0

0～+1.0

0～+1.0

0～+1.5

0～+1.5

purpose

Sidewall and bottom of large and refined ladle

Small and medium ladle as a whole