Zhengzhou Dongfang Ancai Refractory Co., Ltd
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Phone:+86-371－69938359
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E-mail:zzacrc@163.com
Address: No.1 Dongfang Road, Chaohua Town, Xinmi City
AC- 36 (Fused cast AZS 36 block))
Category:
Fused zirconium corundum
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Introduction
Despite of the similar eutectic crystal asAZS 33, AZS 36 has more free baddeleyite crystals in chain structure and less vitreous phase, which further improve the corrosion resistibility and reduce the potential defects in glass, so AZS 36 is recommended to be used in sections where glass flow is faster and temperature is higher, such as melter sidewall, paving, doghouse, etc.
Typical Chemical Composition:
Al2O3 48.3%
Zr2O3 36%
SiO2 14%
NaO2 1.4%
Fe2O3+TiO2+CaO 0.3%
Typical Crystallographic Analysis:
Baddeleyite 35.5%
Alumina (corundum) 43.5%
Vitreous Phase 21%
Typical Physical Properties：
| Item | Value | |
| True Specific Gravity | 3.93g/cm3 | |
| Apparent Porosity | 1.0% | |
| Cold Crushing Strength | 350MPa | |
| Exudation Temp. | 1400 ℃ | |
| Static corrosion of molten glass （Soda-lime glass, 1500℃ *36 h）： |
1.4mm/24h | |
| Blister rate （Soda-lime glass, 1300℃ *10 h）： |
1.2% | |
| Bulk density | PT/QX | 3.5 g/cm3 |
| ZWS | 3.75 g/cm3 | |
| WS | 3.8 g/cm3 |
Casting Technology
ZWS : Sidewall
WS ： Sidewall
Normal Cast
Some shrinkage voids are formed under the casting scar in the annealing process.The blocks(PT)having such voids are usually installed and used in the area with no serious corrosion and the surface with scar is not used as working face,considering no influence for furnace performance and life.
Tilting Cast
A special casting technique which causes shrinkage voids to be concentrated toward one end of the blocks,allowing the other end to become compact for maximum use.
End cast
ZWS casting reserves only a few small voids under the casting scar and produces a very compact structure,so it is widely used in production of melter sidewall blocks.
Void Free Cast
Casting is performed with a large header in which most of the voids are concentrated.The header is subsequently cut off after cooling.The resultant block is compact and substantially void-free.AC-41 and AC-M are preferably in WS casting.
Key words:
AC- 36 (Fused cast AZS 36 block))
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