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High Dense Zircon Block

High dense zircon bricks have good corrosion resistance against alkali-free glass, high temperature creep resistance, and good high temperature flexural strength. It is used in specialty glass furnaces and nuclear industry with strict requirements on trace impurities.

In the alkali-free glass kiln, it is used in glass contact parts, such as paving or sub-paving of melting bottom , forehearths, channel blocks and back-up blocks of sidewall. In addition, it is also used as sidewall blocks, bottom paving or back-up blocks of LCD glass, crystallized glass, low alkali boro-alumino silicate glass and laser glass furnaces.

Item HDZ-65
ZrO2 (%) ≥65
SiO2 (%) ≤33
Fe2O3(%) ≤0.3
Apparent Porosity (%) ≤1
Bulk Density (g/cm3) ≥4.25
Cold Crushing Strength (Mpa) ≥310
0.2Mpa Refractoriness Under Load T0.6 ≥1680
Pyrometric Cone Equivalent S.C. SK 40
Reversible Thermal Expansion 1000℃ % 0.5



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