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High-Performance Fused Cast 33 # AZS Block (RTK-AZS3- Quality China Suppliers & Factory for Glass Industry Refractories
Brief Introduction
RTK fused cast AZS blocks are made of high-quality purified raw materials, using a special electric arc furnace, and a fused cast process that has undergone long arc melting and oxidation treatment. This process has almost no carbon contamination from the electrode. Due to the oxidation fused cast process and the use of high-purity raw materials, RTK fused cast AZS series have special and high resistance to the corrosion of molten glass, and have little contamination to the molten glass.
Fused cast AZS products can be divided into 41# AZS block (RTK-AZS41), 36 # AZS block (RTK-AZS36) and 33 # AZS block (RTK-AZS33) according to the different ZrO₂ content in the chemical composition.
RTK-AZS33, a high-performance refractory material, is particularly superior in preventing molten glass from being contaminated. It has little tendency to cause stones, bubbles and matrix glass phase precipitation in the glass. It is applicable to the upper structure of the melting end, the side wall of the working pool, the paving blocks and forehearth, etc.
Standardly poured AZS33 block is suitable for working tank, forehearth, superstructure and crown, while AZS33 poured without shrinkage cavities is suitable for tank sidewall, tank bottom, forehearth, C-shaped block, doghouse arch, superstructure and etc.
Chemical composition
| CHEMICAL COMPOSITION | TYPICAL VALUE |
| SIO2% | 15 |
| AI2O3% | The Remainder |
| ZrO2 | 33.5 |
| Fe2O3＋TiO2＋CaO＋MgO＋Na2O＋K2O% | ≤2.0 |
Physical property
| PHYSICAL PROPERTY | TYPICAL VALUE |
| Bulk density (dense part) g/cm3 | 3.80 |
| Apparent porosity (dense part) % | 0.7 |
| Initial precipitation temperature of vitreous phase°C | 1400 |
| Vitreous phase exudation (1500°CX4hr)% | 2.0 |
| Anti-molten glass erosion speed under static condition mm/24hr | 1.4 |
| Bubble release rate%(1300°CX10hr,ordinary soda lime glass) | 1.2 |
| CALCULATE SPECIFIC GRAVITY | TYPICAL VALUE |
| Ordinary casting /inclined casting g/cm3 | 3.5 |
| Quasi-non shrinkage casting g/cm3 | 3.70 |
| Non shrinkage casting g/cm3 | 3.80 |
Frequently Asked Questions
How are RTK fused cast AZS blocks manufactured?
They are produced from high-quality purified raw materials in a special electric arc furnace through an oxidation fused cast process with long arc melting, which ensures almost zero carbon contamination from the electrode.
How are fused cast AZS products classified?
Fused cast AZS products are categorized based on their ZrO₂ content into 41# AZS block (RTK-AZS41), 36# AZS block (RTK-AZS36), and 33# AZS block (RTK-AZS33).
What are the primary characteristics of RTK-AZS33?
RTK-AZS33 offers high resistance to molten glass corrosion and prevents glass contamination with minimal tendency to produce stones, bubbles, or matrix glass phase precipitation.
Where is standardly poured AZS33 typically used?
Standardly poured AZS33 blocks are ideal for the working tank, forehearth, superstructure, and furnace crown.
What are the application areas for AZS33 poured without shrinkage cavities?
AZS33 poured without shrinkage cavities is suitable for tank sidewalls, tank bottoms, forehearths, C-shaped blocks, doghouse arches, and superstructures.
What is the typical chemical composition of RTK-AZS33?
It typically contains 33.5% ZrO₂, 15% SiO₂, ≤2.0% trace oxides (Fe₂O₃ + TiO₂ + CaO + MgO + Na₂O + K₂O), and the remainder Al₂O₃.