High-Quality Fused Cast Mullite Block (RTK-FM/ZM) - China Suppliers & Factory for High-Temperature Applications
Brief Introduction
We have passed ISO9001, ISO14001, and ISO45001 management system certification. At the same time, our company has established an intelligent management platform to conduct digital collection and analysis of the production process from raw materials to finished products, and have steadily improved the quality stability and traceability of products.
We use the most advanced flaw detection radar GPR of Laurel (USA) Instrument Co., Ltd. to detect the internal defects of blocks. The GPR is equipped with a 2.7G antenna, a positioning system, a touch screen operation interface and six control buttons. It can detect the internal cavities of inorganic non-metallic materials and display the detection results in images. The results are intuitive and efficient.
We establish a standardized, independent and efficient quality assurance system according to the requirements of modern enterprises. We rely on advanced analytical instruments and testing equipment to monitor the whole process of products, provide scientific and effective theoretical data for production, and provide users with high-level quality supervision services.
Chemical Composition
| CHEMICAL COMPOSITION | FM TYPICAL VALUE | ZM TYPICAL VALUE |
|---|---|---|
| SiO2% | 17 | 16.0 |
| Al2O3% | 77.5 | 75 |
| ZrO2% | 2.5 | 5.0 |
| Fe2O3% | 2.0 | 2.0 |
| TiO2 + CaO + MgO + Na2O + K2O% | 1.0 | 2.0 |
Physical Property
| PHYSICAL PROPERTY | FM TYPICAL VALUE | ZM TYPICAL VALUE |
|---|---|---|
| Bulk density (dense part) g/cm3 | 3.2 | 3.2 |
| Bending strength at room temperature MPa | 140 | 140 |
| High temperature bending strength MPa (1350°C) | 100 | 100 |
| Thermal conductivity (1300°C) W/m·K | 4.6 | 5.4 |
| Thermal linear expansion (1300°C) % | 0.8 | 0.9 |
| CALCULATE SPECIFIC GRAVITY | ||
| Ordinary casting / inclined casting g/cm3 | 3.0 | 3.0 |
| Quasi-non shrinkage casting g/cm3 | 3.1 | 3.1 |
| Non shrinkage casting g/cm3 | 3.2 | 3.2 |
Frequently Asked Questions
What are the primary raw materials of RTK-FM/ZM fused cast blocks?
RTK-FM/ZM fused cast zirconia mullite blocks are manufactured from high-quality mullite clinker, premium imported bauxite, and zircon sand through melting and casting in a high-temperature electric arc furnace.
Where are RTK-FM and RTK-ZM blocks commonly applied?
They are primarily applied to severe wear-resistant and high-temperature furnace zones, such as skid roll bricks in metallurgical push-type furnaces, tapping platforms (spouts) in walking beam heating furnaces, and refractory linings of waste incinerators.
What is the difference between FM and ZM typical values?
The main chemical distinction lies in the ZrO2 content: RTK-FM contains approximately 2.5% ZrO2 and 77.5% Al2O3, whereas RTK-ZM contains 5.0% ZrO2 and 75% Al2O3. Thermally, ZM offers higher thermal conductivity (5.4 W/m·K vs. 4.6 W/m·K at 1300°C).
How is internal structural integrity guaranteed for cast blocks?
Internal quality is inspected using advanced Laurel (USA) ground penetrating radar (GPR) equipped with a 2.7G antenna, allowing non-destructive visual imaging of cavities and internal voids in non-metallic materials.
What casting options are available for specific gravity requirements?
We supply three casting specifications: Ordinary casting / inclined casting (3.0 g/cm³), Quasi-non shrinkage casting (3.1 g/cm³), and Non shrinkage casting (3.2 g/cm³).
What quality management certifications govern production?
Production is fully governed under ISO9001 quality, ISO14001 environmental, and ISO45001 occupational health and safety management systems, backed by an intelligent digital traceability platform.