GMP-55

GMP-70

GMP-80

refractoriness°C

≥1790

≥1820

≥1850

Al2O3%

55

70

80

Bulk density  (g/cm3) (after dry

≥2.3

≥2.6

≥2.7

Rupture strength

Mpa

Room temperature

≥6

≥7

≥7

110°C×24h

≥8

≥10

≥12

CCS

Mpa

Room temperature

≥35

≥35

≥35

110°C×24h

≥80

≥80

≥80

Linear change%

±0.5

±0.5

±0.5

Safty use temperature

1350°C

1400°C

1450°C