Brand Specification	HBLT-60	HBLT-70	HBLT-80	HBL-94	HBLMT	HBLGT
Al2O3    ≥ %	60	70	80	94	55	80
MgO   ≥ %	-	-	-	-	8	ZrO2≥3
C     ≥ %	3	7	5	-	8	3
Apparent porosity % ≤	10	10	6	18	10	9
Bulk density  g/cm3 ≥ %	2.7	2.8	2.9	3.0	2.9	3.1
Compressive strength(MPa)	-	-	-	85	-	-