China Fused Cast AZS Block RTK-AZS36 Suppliers & Factory for High Corrosion Resistance in 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-AZS36 is a standard oxidation fused cast AZS block, which has the characteristics of particularly high resistance to the corrosion of molten glass and low contamination, and its performance in these two aspects is balanced. It is applicable to the parts in direct contact with the molten glass in the glass furnace, such as the side wall of the melting end, the paving tiles and the doghouse.
Chemical Composition
| Chemical Composition | Typical Value |
|---|---|
| SiO₂% | 13.0 |
| Al₂O₃% | The Remainder |
| ZrO₂% | 36.5 |
| Fe₂O₃＋TiO₂＋CaO＋MgO＋Na₂O＋K₂O% | ≤2.0 |
Physical Property
| Physical Property | Typical Value |
|---|---|
| Bulk density (dense part) g/cm³ | 3.90 |
| Apparent porosity (dense part) g/cm³ | 0.8 |
| Initial precipitation temperature of vitreous phase°C | 1400 |
| Vitreous phase exudation (1500°CX4hr)% | 2.3 |
| Anti-molten glass erosion speed under static condition mm/24hr(1500°CX36hr,ordinary soda lime glass) | 1.3 |
| Bubble release rate%(1300°CX10hr,ordinary soda lime glass) | 1.0 |
| Calculate Specific Gravity | |
| Ordinary casting /inclined casting g/cm³ | 3.55 |
| Quasi-non shrinkage casting g/cm³ | 3.80 |
| Non shrinkage casting g/cm³ | 3.85 |
Frequently Asked Questions (FAQ)
RTK fused cast AZS blocks are manufactured using high-quality purified raw materials in a special electric arc furnace, undergoing a long arc melting and oxidation treatment process.
They are classified into 41# AZS (RTK-AZS41), 36# AZS (RTK-AZS36), and 33# AZS (RTK-AZS33) based on the ZrO₂ content in their chemical composition.
On the basis of the standard manufacturing processes, the SiO₂ and Na₂O contents are reduced to form RTK-AZS36D and RTK-AZS33D, offering specialized performance for glass furnaces.
RTK-AZS36 is ideal for parts in direct contact with molten glass, such as the side walls of the melting end, paving tiles, and the doghouse.
The oxidation fused cast process and high-purity raw materials ensure high resistance to glass corrosion and prevent carbon contamination from the electrodes.
The dense part of the RTK-AZS36 block features a typical bulk density of 3.90 g/cm³.