What are the factors affecting the life of refractory bricks?
  • Time:Jan 18, 2023
  • Views: 1

      There are many factors that affect the life of refractory bricks, mainly for the following reasons.

      1. Refractory bricks are subject to high temperature and thermal shock stress. The melt firing zone (the front end of the upper transition zone) is in the middle of the kiln, the temperature of the flue gas is around 1700 degrees Celsius, and the temperature of the kiln material is above 1300 degrees Celsius. The body lacks kiln skin protection. Therefore, when Zhengzhou Zhenjin Company develops and produces fired refractory bricks, it takes load softening temperature as an important indicator, and needs refractory bricks that are resistant to kiln material melt erosion. ZHENJIN REFRACTORIES' perclaes-hercynite refractory brick can meet various requirements and is an ideal environmentally friendly alkaline refractory brick for the firing zone.

      2. The influence of the gas generated in the clinker production process inside the kiln. In addition, the main components of the raw material of clinker are CaO, SiO2, Al2O3, Fe2O2, and the minor components are oxides such as MgO, K2O, Na2O, SO3, Cl2, and trace element compounds. In recent years, a large amount of raw fuel, industrial waste and municipal solid waste has been used as raw fuel for cement, increasing the variety and quantity of small and trace element compounds. A gaseous compound that causes thermochemical attack on the refractory lining. In order to reduce the production of polluting gases, ZHENJIN REFRACTORIES introduced desulfurization and denitrification equipment to realize green production.

      3. Mechanical peeling. Mechanical stress is generated between the lining brick and the lining brick, between the lining brick and the kiln material, between the lining brick and the metal cylinder, and between the lining body and the thermally expanded metal parts, resulting in the damage of the lining brick.

      4. The kiln is cold and hot. The temperature is increased drastically in a short period of time in the furnace, with no buffer period. Refractory bricks are subject to varying degrees of thermal shock, increasing the risk of refractory brick breakage. Therefore, ZHENJIN REFRACTORIES technicians require users to slow down the heating process when drying the kiln after the installation of the refractory bricks, so that the expansion of the kiln cylinder complements the expansion of the bricks to play a compensatory role in the kiln body. This is because of the use of alkaline bricks.

      5. Refractory bricks can resist the corrosion of high temperature charge and the scouring effect of chemical gas in high temperature use. The chemical corrosion of various acids, alkali gases, slag or solutions to refractory bricks can be seen everywhere, which seriously affects its service life. The selection of refractory bricks with different properties is of great significance for improving the service life of the masonry. ZHENJIN REFRACTORIES can tailor refractory products for customers according to the actual working conditions and the kiln industry, so that the service life of the refractory materials can reach the best state. 


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