What is the production process of Alumina Hollow Brick?

The main raw material of alumina hollow brick is ore or industrial alumina powder with high content of alumina (Al₂O₃). When selecting raw materials, factors such as purity, particle size and chemical composition need to be considered. The higher the purity of the raw materials, the better the performance of the alumina hollow bricks. In addition, the particle size of the raw materials also needs to be finely controlled to ensure the uniformity and density of the finished product.

The raw materials that have been initially selected need to be crushed and mixed. The purpose of crushing is to adjust the particle size of the raw materials to a suitable range for the subsequent molding process. Mixing is to mix various raw materials in a certain proportion to ensure that the performance of the alumina hollow bricks meets the design requirements. Molding is a key step in the production of alumina hollow bricks. Common molding methods are press molding and extrusion molding. Press molding is to press the mixed raw materials into a brick blank of a specified shape through a mold. This method is suitable for the production of alumina hollow bricks with simpler shapes. Extrusion molding is to extrude the raw materials into a brick blank of a specified shape through an extruder. This method is suitable for the production of alumina hollow bricks with complex shapes. During the molding process, the molding pressure and holding time need to be strictly controlled to ensure the density and dimensional accuracy of the brick blank. At the same time, attention should be paid to the cleaning and maintenance of the mold to prevent the brick blank from being contaminated or damaged during the molding process. The brick blank after molding needs to be dried and fired. Drying is to remove moisture from the brick blank to prevent cracks caused by evaporation of moisture during the firing process. Drying is usually carried out in a special drying room by controlling temperature and humidity. Firing is the last step in the production of alumina hollow bricks and the most critical step. During the firing process, the brick blank needs to be treated with high temperature to make the alumina powder in it undergo a solid phase reaction to form a dense alumina crystal structure. The firing temperature and time need to be strictly controlled to ensure the performance and quality of the alumina hollow brick. The fired alumina hollow brick needs to be quality inspected, including indicators such as size, density, and strength. Qualified alumina hollow bricks will be packaged and shipped to customers for use.

The production process of alumina hollow bricks is a complex and delicate process, which requires strict control of process parameters and quality standards in each link. Only in this way can we produce alumina hollow brick products with excellent performance and reliable quality.
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