There are significant differences between super high-alumina bricks and ordinary high-alumina bricks (ordinary high-alumina bricks) in raw materials, properties, service temperature and service life. The following are specific comparisons:

I. Alumina content

Super high-alumina brick: the content of alumina (Al₂O₃) is not less than 85%.

General high alumina brick: the alumina content is usually between 48% and 75%.

II. Fire resistance

Super high-alumina brick: the fire resistance is above 1820℃.

General high alumina brick: the fire resistance is usually 1770℃-1790℃.

III. Load softening temperature

Super high alumina brick: the softening temperature under load is about 1550℃.

General high alumina brick: The softening temperature under load is usually 1460℃-1510℃.

IV. Bulk density and strength

Super high alumina brick: the bulk density is about 2.6g/cm³, and the compressive strength at room temperature is greater than 80MPa.

General high-alumina brick: the bulk density is between 2.3g/cm and 2.5g/cm, and the compressive strength at room temperature is between 50MPa-70MPa.

V. Service life

Super high-alumina brick: The service life is about 2 times that of ordinary high-alumina brick.

General high alumina brick: The service life is usually 2-3 years.

VI. Erosion and wear resistance

Super-grade high-alumina brick: better corrosion resistance and wear resistance, and higher fatigue resistance at high temperature.

General high-alumina brick: the corrosion resistance is relatively weak, and the wear resistance is not as good as that of super-high-alumina brick.

VII. Operating temperature

Super high alumina brick: the service temperature is above 1500℃.

General high alumina brick: The service temperature is usually 1250℃-1400℃.

VIII. Applicable scenarios

Super high alumina brick: suitable for high temperature and high erosion environment, such as large blast furnace, hot blast stove, glass melting furnace, etc.

General high alumina brick: suitable for medium temperature and corrosive environment, such as cement kiln and small furnace lining.

IX. Price

Super-grade high-alumina brick: Due to higher requirements of raw materials and production technology, the price is relatively high.

General high alumina brick: the price is relatively low.

X. Summary

Super high-alumina bricks are superior to ordinary high-alumina bricks in alumina content, refractoriness, load softening temperature, corrosion resistance and wear resistance, and are suitable for higher temperature and more harsh working conditions, but the price is relatively higher. The choice should be weighed according to the specific use needs and budget.