Magnesia-alumina spinel refractory brick is a type of high-grade refractory brick that has been extensively used in various industries due to its excellent technical performance and superior resistance to high temperatures. This type of refractory brick is made of magnesia and alumina spinel as the main raw materials, which are processed through a series of production processes, including mixing, molding, drying, and firing.
Magnesia-alumina spinel refractory brick can be classified into three grades: low-grade, medium-grade, and high-grade. The difference between each grade lies in the content of alumina spinel, which affects the refractory brick's quality and performance. The high-grade refractory brick has a high alumina spinel content and excellent high-temperature resistance, making it suitable for high-temperature industrial furnaces that require strong resistance to thermal shock, erosion, and wear.
The technical parameters of magnesia-alumina spinel refractory brick include bulk density, modulus of rupture, thermal shock resistance, refractoriness under load, and thermal conductivity. These parameters directly impact the performance and durability of the refractory brick. For example, a high bulk density means a high level of compactness, while a high modulus of rupture means greater resistance to mechanical stress, and a high thermal shock resistance indicates superior resistance to drastic temperature changes.
In terms of production, the manufacturing process of magnesia-alumina spinel refractory brick includes several steps. Firstly, the raw materials are mixed in suitable proportions and then molded into the desired shape. Next, the formed bricks are heated at high temperatures in a tunnel kiln or rotary kiln to remove the moisture and create the final refractory structure. The firing process requires careful control of temperature and atmospheric conditions to ensure uniformity and high-quality performance.
In conclusion, magnesia-alumina spinel refractory brick is a crucial material for many high-temperature industrial applications. Through careful formulation, grading, and production, this refractory brick can offer superior resistance to thermal shock, wear, and erosion, making it an essential component of modern industrial furnaces and kilns.
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