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Fused Cast Mullite Block (RTK-FMZM）.jpg

High-Quality Fused Cast Mullite Block (RTK-FM/ZM) - China Suppliers and Factory for Refractory Materials

RTK-FM/ZM fused cast zirconia mullite blocks are manufactured in China from premium-grade mullite clinker, imported bauxite, and zircon sand through a high-temperature melting and casting process in an electric arc furnace. As one of the leading suppliers in the industry, we provide these high-performance refractory materials primarily for wear-resistant and high-temperature applications. Our products are ideal for components such as skid roll bricks for metallurgical push-type furnaces, tapping platforms (tapping spouts) of walking beam heating furnaces, and linings for garbage incinerators. Our fused cast zirconium mullite is widely utilized in various high-temperature industrial sectors, including glass melting kilns and ceramic kilns, making us a trusted factory for reliable and durable refractory solutions
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    Product Detail

    Brief Introduction

    RTK-FM/ZM fused cast zirconia mullite block are made from high-quality mullite clinker, imported bauxite and zircon sand by melting and casting at high temperature in electric arc furnace. It is mainly used for wear-resistant and high temperature resistant parts, such as skid roll bricks of metallurgical push-type furnace or tapping platform (tapping spout) of walking beam heating furnace and lining of garbage incinerator.

    Key Applications

    Ideal for wear-resistant and high-temperature environments: skid roll bricks for metallurgical push-type furnaces, tapping platforms (tapping spouts) of walking beam heating furnaces, and linings of municipal waste 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, 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
    Calculated Specific Gravity (g/cm3)
    Ordinary casting / inclined casting 3.0 3.0
    Quasi-non shrinkage casting 3.1 3.1
    Non shrinkage casting 3.2 3.2

    Frequently Asked Questions

    What raw materials are used in RTK-FM/ZM fused cast zirconia mullite blocks?
    RTK-FM/ZM fused cast zirconia mullite blocks are manufactured using high-quality mullite clinker, imported bauxite, and zircon sand, melted and cast at high temperatures in an electric arc furnace.
    What are the primary applications of these zirconia mullite blocks?
    They are mainly used for high-temperature and wear-resistant applications, including skid roll bricks in metallurgical push-type furnaces, tapping platforms (tapping spouts) in walking beam heating furnaces, and linings for municipal waste incinerators.
    How is the quality and internal structure of the blocks inspected?
    We utilize the advanced Ground Penetrating Radar (GPR) system from Laurel (USA) Instrument Co., Ltd. equipped with a 2.7G antenna to non-destructively detect internal cavities and defects, displaying high-resolution visual results.
    What quality management certifications does your production process hold?
    Our manufacturing and management systems are fully certified under ISO9001 (Quality Management), ISO14001 (Environmental Management), and ISO45001 (Occupational Health and Safety Management) standards.
    What is the difference in chemical composition between FM and ZM blocks?
    The primary difference lies in the Zirconia (ZrO2) content; FM typical values contain 2.5% ZrO2, whereas ZM typical values contain 5.0% ZrO2, offering tailored performance for specific thermal and mechanical requirements.

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