Product Details
Product Introduction
Magnesia-alumina bricks represent one of the key offerings from Rongsheng Kiln Refractory Materials Co., Ltd. Categorized into three varieties—ordinary magnesia-alumina bricks, magnesia-alumina spinel bricks, and modified magnesia-alumina spinel bricks—these products utilize primary raw materials such as high-alumina bauxite clinker, sintered magnesia, and high-purity pre-synthesized magnesia-aluminum spinel. The formation of the magnesia-alumina spinel mineral phase during high-temperature conditions results in superior thermal expansion homogeneity and a minimized thermal expansion coefficient, which markedly enhance thermal shock stability and thermomechanical characteristics. Ordinary magnesia-alumina bricks find extensive application in steelmaking open-hearth furnaces, electric furnaces, glass kilns, refractory product firing tunnel kilns, and shuttle kilns. In contrast, magnesia-alumina spinel bricks are especially well-suited for high-temperature environments like the transition zones of cement rotary kilns, lime kilns, glass kilns, and refining apparatus outside the furnace due to their outstanding corrosion resistance, oxidation-reduction resilience, and high-temperature volume stability. Modified magnesia-alumina spinel bricks are specifically engineered for the firing zones of cement rotary kilns, substantially enhancing their alkali steam resistance and permeability against cement clinker liquid phases, while also improving mechanical stress resistance. This innovation addresses the traditional challenges faced by magnesia-alumina bricks in firing zones, often leading to tissue embrittlement and structural spalling in tape-forming applications. Overall, due to their consistent chemical composition, versatile configurations, and exceptional performance, magnesia-alumina bricks are extensively utilized across various high-temperature kiln applications, showcasing their superior quality and reliability in demanding thermal environments.
Advantages and features
1. Superior resistance to thermal shock: The magnesium-aluminum spinel mineral phase is characterized by exceptional uniformity in thermal expansion and a low thermal expansion coefficient; 2. Exceptional stability under high-temperature conditions: Magnesia-alumina spinel bricks maintain a stable volume structure, even when exposed to extreme thermal conditions; 3. Excellent corrosion resistance: These magnesia-alumina spinel bricks demonstrate remarkable performance against both oxidation and reduction environments; 4. High resistance to mechanical stress: Enhanced modified magnesia-alumina spinel bricks significantly improve resilience against mechanical stress, effectively mitigating tissue embrittlement and structural spalling; 5. Uniform chemical composition: By employing high-quality raw materials such as high-purity pre-synthesized magnesium-aluminum spinel, we guarantee the consistency and stability of performance across our products.
Application Scenario
1. Ordinary magnesia-alumina bricks are ideal for use in high-temperature environments such as steelmaking open-hearth furnaces, electric furnaces, and tunnel kilns; 2. Magnesium-aluminum spinel bricks are specifically designed for applications in equipment that require high-temperature volume stability, particularly in the transition zone of cement rotary kilns; 3. Modified magnesia-alumina spinel bricks are tailored for high-temperature mechanical stress conditions, making them suitable for the firing zone of cement rotary kilns.
