Aluminum thermal insulation fire brick is a kind of refactory material which is widely used in chemical, metallurgy and building industries. It is made of high quality alumina and excellent fire material, adopting advanced process technology to form alumina-magnesium bricks, clay horns and other characteristics. It has the advantages of beautiful surface, high temperature resistance, good thermal insulation performance, excellent anti-erosion performance, stable performance and convenient use. However, due to the physical, chemical and thermal characteristics of aluminum thermal insulation fire brick, there will be cracks on its cross section, which seriously affects its service life and performance.
The cross section cracking of aluminum thermal insulation fire brick is mainly caused by the accumulation of thermal stress and intrusive force during the service process. Therefore, when selecting and preparing to use aluminum thermal insulation fire brick, it is necessary to pay attention to the three-point principle of pressure, temperature, performance and type of aluminum fire brick. Before use, dry the fire brick and remove the surface moisture, so as not to reduce its thermal shock resistance, acid and alkali corrosion resistance and other performance.
In order to prolong the service life and maintain the performance of aluminum thermal insulation fire brick, it is also necessary to use it in a suitable temperature range, which should not exceed the selected model’s maximum working temperature. Otherwise, the cross section of the aluminum fire brick will be easily cracked, affecting its performance and causing losses. Therefore, before using aluminum thermal insulation fire brick, it is necessary to understand the usage environment, temperature and other data of the fire brick, and carry out corresponding treatment according to the requirements.
In addition, improper operation and use of aluminum thermal insulation fire brick in construction and fire design, such as mismatched bricks, cold and hot joints or improper installation, will also cause thermal stress, resulting in cross-section cracking of the fire brick. Therefore, it is necessary to install the fire brick according to the design drawings and pay attention to the details of construction to avoid structural stress and ensure the integrity of the fire brick.
In a word, the cross-section cracking of aluminum thermal insulation fire brick seriously affects its performance, and it is necessary to prevent and control it in selection, preparation, construction and other aspects. It is necessary to strictly implement the requirements of operation and maintenance, correctly understand the use environment of aluminum fire brick, avoid mismatched bricks and improper joint connection.
