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High-Performance Fused Cast AZS Block RTK-AZS33 from China Suppliers and Factory for Glass Industry Applications
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.
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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 |
| Al2O3% | 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
What is the composition difference between the different RTK fused cast AZS blocks?
Fused cast AZS products are categorized into 41# AZS block (RTK-AZS41), 36# AZS block (RTK-AZS36), and 33# AZS block (RTK-AZS33) based on the ZrO₂ content in their chemical composition.
Why do RTK fused cast AZS blocks have low carbon contamination?
They are manufactured using high-quality purified raw materials in a special electric arc furnace. The oxidation fused cast process involves long arc melting, which ensures almost zero carbon contamination from the electrodes.
What are the primary applications of RTK-AZS33 blocks?
RTK-AZS33 is highly effective at preventing molten glass contamination. It is widely used in the upper structure of the melting end, the side walls of working pools, paving blocks, and forehearths.
Where should standardly poured vs. non-shrinkage AZS33 blocks be used?
Standardly poured blocks are suitable for working tanks, forehearths, superstructures, and crowns. Poured blocks without shrinkage cavities (non-shrinkage) are preferred for tank sidewalls, tank bottoms, forehearths, C-shaped blocks, doghouse arches, and superstructures.
What is the typical bulk density of the dense part of RTK-AZS33?
The typical bulk density of the dense part of the RTK-AZS33 block is 3.80 g/cm³, providing superior structural stability and resistance to erosion.