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Why do industrial kilns such as cement kilns and lime kilns use magnesia-aluminum spinel bricks?
  • Time:Apr 03, 2023
  • Views: 13

      Magnesia-aluminum spinel brick is a high-temperature refractory material, which is usually used in the lining of industrial furnaces such as cement kilns and lime kilns to protect the furnace body from high temperature, erosion and other factors. The magnesia-aluminum spinel brick produced by Zhenjin refractory is favored by the majority of users for its compact structure, strong corrosion resistance, high thermal shock resistance, and high load softening temperature. This article will introduce the characteristics, application scenarios, advantages and disadvantages of magnesia-alumina spinel bricks.

1. Characteristics of magnesia alumina spinel brick

      (1) Tight structure: the structure of magnesia-alumina spinel brick is very dense, and because of its low microporosity, it has good corrosion resistance and slag corrosion resistance.

      (2) Strong corrosion resistance: the main component of magnesia-aluminum spinel bricks is MgAl2O4. This compound can resist various chemical erosions such as acids, alkalis, and salts, and will not chemically react with the processed substances.

      (3) High thermal shock resistance: Magnesia-aluminum spinel bricks have high thermal shock resistance and can withstand large temperature changes without cracks and fragmentation, so they can guarantee high-temperature industrial furnaces such as cement kilns and lime kilns. Long-term stable operation of the kiln.

      (4) High load softening temperature: The load softening temperature of magnesia-aluminum spinel bricks is very high, generally around 1600°C, so it can withstand greater pressure and heavy loads.

2. Application scenarios of magnesia-alumina spinel bricks

      Due to its good physical and chemical properties, magnesia-alumina spinel bricks are widely used in the lining of industrial furnaces such as cement kilns and lime kilns. These industrial furnaces usually need to withstand extremely high temperature and erosion. If traditional refractory materials are used, problems such as cracking, deformation, and penetration are prone to occur, which will affect the service life and efficiency of the furnace body. The magnesia-aluminum spinel brick can effectively protect the furnace body from high temperature, erosion and other factors due to its excellent performance, thus prolonging the service life and maintenance cycle of industrial furnaces.

3. Advantages and disadvantages of magnesia alumina spinel brick

      Magnesia-aluminum spinel bricks have the advantages of compact structure, strong corrosion resistance, high thermal shock resistance, and high load softening temperature. These characteristics make it have good performance in high temperature environment, and can maintain stable operation for a long time. However, compared with traditional refractory materials, the price of magnesia-alumina spinel bricks is relatively high, and the production cost is relatively high.

      In fact, most enterprises still choose magnesia-aluminum spinel bricks, mainly because they perform well in extreme environments such as high temperature and erosion, and can maintain long-term stable operation, thereby improving production efficiency and economic benefits.

      First of all, because magnesia-alumina spinel bricks have many excellent characteristics such as compact structure, strong corrosion resistance, high thermal shock resistance, and high load softening temperature, they are used in the lining of industrial furnaces such as cement kilns and lime kilns. Outstanding. Compared with traditional refractory materials, magnesia-aluminum spinel bricks can better protect the furnace body from high temperature, erosion and other factors, thus prolonging the service life and maintenance cycle of industrial furnaces.

      Secondly, because industrial furnaces such as cement kilns and lime kilns usually need to withstand extremely high temperature and erosion, if traditional refractory materials are used, problems such as cracking, deformation, and penetration are prone to occur, which will affect the service life and efficiency of the furnace body. The use of magnesia-aluminum spinel brick lining can not only effectively protect the furnace body, but also improve production efficiency and economic benefits.

      In addition, although the manufacturing process of magnesia-alumina spinel bricks is relatively complicated, its excellent performance and stable operation allow enterprises to save more maintenance and replacement costs, and can maintain long-term production operations to obtain more High market competitiveness and economic benefits.

      Therefore, enterprises choose to use magnesia-aluminum spinel bricks mainly because they have excellent physical and chemical properties and stability, and can maintain long-term stable operation in extreme environments such as high temperature and erosion, thereby improving production efficiency and economic benefits.

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