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High-Quality Fused Cast AZS Block RTK-AZS41 from China Suppliers and Factory - Corrosion Resistant for Glass Furnaces
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. In addition, on the basis of RTK-AZS36 and RTK-AZS33 manufacturing processes, the content of corresponding chemical components of SiO₂ and Na₂O has been reduced, and two products, 36 # low silicon low sodium AZS blocks (RTK-AZS36D) and 33 # low silicon low sodium AZS blocks (RTK-AZS33D), have been formed. These five products are further classified according to different casting methods, which can meet the different use requirements of fused cast products in glass furnaces.
RTK-AZS41 has high corrosion resistance and low pollution to molten glass, and is suitable for parts in glass furnace that require high corrosion resistance, such as fully electric melting furnace, throat, weir, bubbler block, and doghouse corner block.
Chemical composition
| CHEMICAL COMPOSITION | TYPICAL VALUE |
| SiO2% | 12 |
| Al2O3 % | allowance |
| ZrO2 % | 41 |
| Fe2O3＋TiO3＋CaO＋MgO＋Na2O＋K2O % | ≤2.0 |
Physical property
| PHYSICAL PROPERTY | TYPICAL VALUE |
| Bulk density (dense part) g/cm3 | 4.05 |
| Apparent porosity (dense part) % | 0.6 |
| Initial precipitation temperature of vitreous phase°C | 1400 |
| Vitreous phase exudation (1500°CX4hr)% | 1.5 |
| Anti-molten glass erosion speed under static condition mm/24hr | 1.2 |
| Bubble release rate%(1300°CX10hr,ordinary soda lime glass) | 0.6 |
| CALCULATE SPECIFIC GRAVITY | TYPICAL VALUE |
| Ordinary casting /inclined casting g/cm3 | 3.65 |
| Quasi-non shrinkage casting g/cm3 | 3.90 |
| Non shrinkage casting g/cm3 | 4.00 |
Frequently Asked Questions
What are RTK fused cast AZS blocks made of?
RTK fused cast AZS blocks are manufactured from high-quality purified raw materials using a special electric arc furnace. They undergo a specialized long arc melting and oxidation treatment process, which ensures almost zero carbon contamination from the electrodes.
What are the different types of RTK fused cast AZS blocks?
They are classified based on their ZrO₂ content into RTK-AZS41 (41# AZS), RTK-AZS36 (36# AZS), and RTK-AZS33 (33# AZS). Additionally, there are low-silicon, low-sodium versions: RTK-AZS36D and RTK-AZS33D.
What are the main applications of RTK-AZS41?
RTK-AZS41 is highly resistant to corrosion and offers low pollution to molten glass. It is ideal for critical glass furnace areas such as fully electric melting furnaces, throats, weirs, bubbler blocks, and doghouse corner blocks.
What is the typical chemical composition of RTK-AZS41?
The typical chemical composition of RTK-AZS41 includes 41% ZrO₂, 12% SiO₂, with Al₂O₃ as the remaining balance, and impurities (Fe₂O₃＋TiO₃＋CaO＋MgO＋Na₂O＋K₂O) kept under 2.0%.
What are the physical properties of the dense part of these AZS blocks?
The dense part of the block features a typical bulk density of 4.05 g/cm³ and an apparent porosity of 0.6%. The initial precipitation temperature of the vitreous phase is 1400°C.
How do casting methods affect the calculated specific gravity of these blocks?
The specific gravity varies by casting method: ordinary/inclined casting yields 3.65 g/cm³, quasi-non shrinkage casting yields 3.90 g/cm³, and non-shrinkage casting yields 4.00 g/cm³.