Zircon brick is refractory product made of natural zircon. It has the advantages of strong slag resistance, high mechanical strength, high refractoriness under load, large abrasive resistance and excellent thermal shock stability, it is an important material for furnace construction in the industries, such as metallurgy, building materials and electronics, It is usually used in regenerator chamber, bottom part and side wall.

1. Zircon Brick With Good Dense Structure For Glass Furnace
Why does zircon brick have dense structure?
Zircon brick is acid refractory whose main composition is ZrO2, generally the contents is
above 64%, and the superior zircon sand is imported from Australia which has excellent
quality, at the same time, SiO2 and Fe2O3 are added to the material when producing zircon
brick which can make its micro structure dense. Zircon brick is designed to using in specific
environment where the zircon brick need to withstand high temperature and heavy
pressure ， meanwhile, zircon brick can still keep its own stability. In addition, the dense
structure of zircon brick directly leads to its ability of strong resistance to glass liquid, good
creep resistance and high refractoriness under load.
As to zircon brick, zircon brick can be divided into several types according to the content of
ZrO2, such as ZS-64, ZS-65,HDZ-65,HDZ-68. Obviously, the higher the content of ZrO2, the
better the stability, the higher the ability of bearing high temperature and the higher the
resistance to glass liquid. Zircon brick with the excellent performance and features can mainly
be used in glass contact portion of alkali free or low-alkali glass melting furnace, such as the
superstructure of flame space and tank bottom of glass furnace. and it is also used in lining of
other quality glass furnace and special glass furnace with high corrosion resistance, such as
boron silicate glass, ceramic glass, low-alkali or other technical glass.
Below are the specific indexes of zircon brick:
Item ZS-64 ZS-65 HDZ-65 HDZ-68
ZrO2 （%） ≥64 ≥65 ≥65 ≥68
SiO2 （%） ≤34 ≤33 ≤33 ≤30
Fe2O3（%） ≤0.5 ≤0.5 ≤0.3 ≤0.3
Apparent Porosity （%） ≤20 ≤18 ≤1 ≤8
Bulk Density (g/cm3) ≥3.6 ≥3.65 ≥4.25 ≥4.15
Cold Crushing Strength （Mpa） ≥100 ≥100 ≥310 ≥200
0.2Mpa Refractoriness Under Load T0.6
℃
≥1630 ≥1650 ≥1680 ≥1680
Pyrometric Cone Equivalent S.C. SK 40 40 40 40
Reversible Thermal Expansion 1000℃
%
0.5 0.5 0.5 0.5

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for further information. Zhengzhou Sunrise Refractory Co., Ltd can provide excellent zircon
brick. All the products of Zhengzhou Sunrise Refractory Co., Ltd have passed the ISO
international certified. High purity raw material, scientific formula, advanced technology and
professional guide, all of them contribute to our qualified production. Sunrise is sincerely
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