Corundum Bricks

Corundum bricks feature high refractoriness under load and excellent chemical stability. They have strong resistance to acidic or alkaline slags, liquid metals, and molten glass, along with a dense structure.

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Physical and Chemical Indicators

Item	GYZ-99A	GYZ-99B	GYZ-98	GYZ-95
Al₂O₃ (%)	≥ 99	≥ 99	≥ 98	≥ 95
SiO₂ (%)	≤ 0.15	≤ 0.2	≤ 0.5	/
Fe₂O₃ (%)	≤ 0.1	≤ 0.15	≤ 0.2	≤ 0.3
Apparent Porosity (%)	≤ 19	≤ 19	≤ 19	≤ 20
Bulk Density (g/cm³)	≥ 3.20	≥ 3.15	≥ 3.15	≥ 3.1
Cold Crushing Strength (MPa)	≥ 80	≥ 80	≥ 80	≥ 100
Refractoriness Under Load (0.2MPa, ℃)	≥ 1700	/	/	/
Permanent Linear Change (%) (1500℃×2h)	± 0.2	± 0.3	/	/

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