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Melting methods of Fused Cast AZS Block



 
 
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Old December 14th 15, 09:44 AM posted to rec.crafts.glass
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Default Melting methods of Fused Cast AZS Block

Melting methods of Fused Cast AZS Block Fused cast AZS block is also called
fusion cast AZS block and fused cast Al2O3-ZrO2-SiO2 block. AZS is the
abbreviation of Al2O3, ZrO2 and SiO2.

Fused cast AZS block is composed of 50%-70% Al2O3, 20%-40% ZrO2 and a small
amount of SiO2 and other components. Based on the ZrO2 content, it can be
divided into AZS 33#, AZS36# and AZS 41#. The most commonly used is AZS 33#,
which has a density of 3.1-3.4g/cm3 and maximum service temperature of 1700
degree.

Based on the position of the electrode, the melting methods of fused cast AZS
can be classified into the reducing method and the oxidizing method. The
electrode of the reducing method is inserted into the melt, while the
electrode of the oxidizing method is over the liquid level.

Products made by different methods have different mineral composition as well
as different proportions and different content of reducing substances (C, H) .
All these will affect the exudation temperature exudation amount of glass
phase.

Now most manufacturers adopt the oxidizing method, since it can reduce the
carbon content to 0.003%-0.006% by long arc melting and blowing oxygen to the
melt. Compared to the reducing method, it can produce fused cast AZS block
with higher corrosion resistance to molten glass and higher exudation
temperature.

Zhengzhou Sunrise is a refractory supplier from China, specializing in various
refractories for glass furnaces, such as fused cast AZS, fused cast high
zircon block, etc..

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