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Zircon Mullite Brick

Zirconium mullite bricks are made of fused zirconium mullite and sintered alumina as the main raw materials, hydrated alumina as the binder, and sintered at high temperature. The product has high density and purity. The corundum phase is more than 70%, the content of oblique zircon is more than 19%, and the content of mullite is more than 7%. The product has good thermal shock resistance, good peeling resistance, and strong corrosion resistance to molten glass.


It can be used in severely corroded parts such as crown of glass melting furnace and port, tuck stones brick, peephole brick, burner brick, channel brick, and doghouse arch. It’s the preferred material for opal glass and high borosilicate glass furnaces.

Item ZM-11 ZM-17  

ZM-20

 

ZM-25

 

ZM-30
Chemical Composition% Al2O3 ≥72 ≥70 ≥59 ≥57 ≥47
ZrO2 ≥11 ≥17 ≥19.5 ≥25.5 ≥30
SiO2 ≤12 ≤12 ≤20 ≤14.5 ≤20
Fe2O3 ≤0.5 ≤0.5 ≤0.5 ≤0.5 ≤0.3
Apparent Porosity% ≤17 ≤17 ≤17 ≤17 ≤18
Bulk Density g/cm3 ≥3.1 ≥3.15 ≥2.95 ≥3.15 ≥3.10
Cold Crushing Strength Mpa ≥90 ≥90 ≥100 ≥120 ≥100
0.2Mpa Refractoriness Under Load T0.6 ≥1630 ≥1650 ≥1650 ≥1650 ≥1650
Permanent Linear Change On Reheating(%)1500℃X2h ±0.3 ±0.3 ±0.3 ±0.3 ±0.3
20-1000℃ Thermal Expansion  % (x 10-6) 0-0.6 0-0.6 0-0.6 0-0.6 0-0.6
Thermal Conductivity (Average800℃)

W / (M.K)

≤2.19 ≤2.19 ≤2.19 ≤2.1 ≤2.1
Pyrometric Cone Equivalent ℃ SK 31 31 31 31 31

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