Fused Cast AZS Block For Glass Furnace
AZS Fused Cast Refractories are the most widely used materials in glass melting furnaces, frit kilns and occasionally some foundry plants(skid rails of reheating furnace). They can be classified by their zirconia content, which basically defines their corrosion resistance, into 3 families: AZS 33, AZS 36 and AZS 41.
Other name: white corundum block, refel 1532, refel 1334, refel 1240, CS-3/4/5, ZB 1681/1691/1711, ER 1681/1685/1711, UNICOR 501/1
Model Number: AZS 33#, AZS 36#, AZS 41#
Certification: ISO/DIN
Minimum Order Quantity: 10
Share With:
Fused Cast AZS Block Introduction
AZS Fused Cast Refractories are the most widely used materials in glass melting furnaces, frit kilns and occasionally some foundry plants(skid rails of reheating furnace). They can be classified by their zirconia content, which basically defines their corrosion resistance, into 3 families: AZS 33, AZS 36 and AZS 41.
AZS 33: The compact microstructure of AZS 33 enables it to have very good corrosion resistance to molten glass. It very rearely results in stoning and has very limited chances to cause blistering and othe defects to glass, so AZS 33 is the most common product used in the glass furnace.
AZS 36: Despite of the similar eutectic crystal as AZS 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 it is recommended to be used in sections where glass flow is faster and temperature is higher, such as melter sidewall, paving, doghouse, etc.
AZS 41: AZS 41 has the most free baddeleyite crystals among the fused cast AZS families, which are evenly distgributed within the block. Its corrosion resistibility is the best and thus it is usually recommended to be used in the most demanding positions to balance the furnace life.
Fused Cast AZS Block Physical and Chemical Index
Chemical Composition( % ) | AZS #33 | AZS #36 | AZS #41 |
ZrO2 | ≥ 32.5 | ≥ 36 | ≥ 40.5 |
SiO2 | ≤ 15.5 | ≤ 14.0 | ≤ 12.5 |
Al2O3 | Remains | Remains | Remains |
Na2O | ≤ 1.4 | ≤ 1.6 | ≤ 1.2 |
Fe2O3 + TiO2 | ≤ 0.25 | ≤ 0.25 | ≤ 0.25 |
Physical characters |
|
Volume density (hardest part) | ≥ 3.80 | ≥ 3.85 | ≥ 4.05 |
Cold crushing strength (MPa) | ≥ 300 | ≥ 300 | ≥ 300 |
Exudation Temp. of glass phase （℃） | ≥ 1400 | ≥ 1410 | ≥ 1420 |
Refractorinessunder load of beginning (0.2MPa) | 1700 | 1700 | 1700 |
Corrosion Resistance to glass melt 1300℃x10h(mm/24h) | 1.5 | 1.0 | 0.7 |
Bulk density (g/cm3 ) | PT | 3.42 |
| ≥ 3.55 |
QX | 3.45 |
| ≥ 3.55 |
ZWS | 3.65 | ≥3.65 | ≥3.85 |
WS | 3.70 | ≥ 3.75 | ≥ 3.95 |
Crystalline phase composition ( % ) |
|
Baddeleyite monocrystal | 32 | 35.5 | 40 |
Glass phase | 20 | 19 | 17 |
Corundum | 47 | 44 | 42 |
Fused Cast AZS Block Features
1.High compression strength
2. Top high temperature capablility.
3. Excellent thermal stability.
4. Low thermal conductivity
5. Powerful proof penetrating capability.
6. Good erosion resistance.
7. Strong resistant erosion stability to the glass liquid.
Fused Cast AZS Block Application
1.Sodium silicate furnace, ceramic frit furnace, glass furnace, etc..
2.Important parts of furnaces where chemical erosion is serious and temperature changes frequently.
3.Lining of glass furnace.
4.The chemical industrial, metallurgical furnaces.
