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High-Quality Fused Cast Mullite Blocks from China Suppliers - Durable Refractory Solutions from Our Factory
Brief Introduction
RTK-FM/ZM fused cast zirconia mullite blocks are made from high-quality mullite clinker, imported bauxite, and zircon sand by melting and casting at high temperatures in an electric arc furnace. It is mainly used for wear-resistant and high-temperature resistant parts, such as skid roll bricks of metallurgical push-type furnaces or tapping platforms (tapping spouts) of walking beam heating furnaces and linings of garbage incinerators.
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, steadily improving 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 Value | ZM 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
Q
What materials are used to manufacture RTK-FM/ZM fused cast zirconia mullite blocks?
RTK-FM/ZM blocks are produced by melting and casting high-quality mullite clinker, imported bauxite, and zircon sand at extremely high temperatures in an electric arc furnace.
Q
What are the primary industrial applications for these blocks?
They are mainly used in high-wear and high-temperature environments, such as skid roll bricks in metallurgical push-type furnaces, tapping platforms/spouts of walking beam heating furnaces, and the internal linings of waste incinerators.
Q
What quality certifications does the manufacturer hold?
The production facility is certified under ISO9001 (Quality Management), ISO14001 (Environmental Management), and ISO45001 (Occupational Health & Safety Management Systems).
Q
How are the internal defects and cavities of the blocks detected?
Internal defects are detected using advanced Ground Penetrating Radar (GPR) from Laurel (USA) Instrument Co., Ltd. The system uses a 2.7G antenna to capture and display real-time images of the block's internal structure.
Q
What is the difference in chemical composition between FM and ZM blocks?
The main difference lies in the zirconia (ZrO2) content. FM typical value contains 2.5% ZrO2 and 17% SiO2, while ZM typical value contains 5.0% ZrO2 and 16.0% SiO2.
Q
What are the thermal properties of these zirconia mullite blocks at high temperatures?
At 1350°C, both blocks maintain a bending strength of 100 MPa. At 1300°C, the thermal conductivity is 4.6 W/m·K for FM and 5.4 W/m·K for ZM, with a thermal linear expansion of 0.8% and 0.9% respectively.