- Time:Jun 02, 2023
The manufacturing process of refractory bricks generally consists of the following steps:
1.Raw materials preparation: The raw materials for refractory bricks vary depending on the type of brick being produced, but typically include refractory clays, kaolin, bauxite, alumina, silica, chromite, magnesite, and other minerals. The raw materials are usually crushed, ground, and screened to obtain the desired particle size.
2.Batch mixing: The dried and screened raw materials are mixed together in a batch mixer to obtain a homogenous mixture.
3.Molding: The mixed powder is then formed into the shape of the desired brick using various molding methods such as extrusion, pressing, slip casting or hand shaping.
4.Drying: The molded bricks are dried in a drying chamber or under the sun to remove any moisture present and increase strength.
5.Firing: The dried bricks are fired at high temperatures in kilns or furnaces to produce the final refractory brick. The firing temperature and duration depend on the type of material used and the desired properties of the brick. During the firing process, chemical reactions take place between the raw materials, resulting in the formation of new compounds and the transformation of the original components.
6.Cooling: Once the firing process is complete, the bricks are cooled slowly to room temperature to prevent cracking or warping.
7.Quality Control: The finished bricks undergo a series of quality control tests to ensure that they meet the required specifications. Some of the tests include dimensional accuracy, density, porosity, thermal conductivity, compressive strength, and resistance to thermal shock and corrosion.
8.Packaging and Shipping: The bricks are packaged and labeled based on their size, grade, and intended use, and then shipped to customers.
Overall, the manufacturing process of refractory bricks requires careful attention to detail and strict quality control measures to ensure consistent quality and performance.
