- Time:May 22, 2023
Checker bricks are used in ironmaking for a number of reasons. One of the primary functions of checker bricks is to support and separate layers of coke and iron ore within a blast furnace, which allows for efficient combustion and the production of high-quality iron.
More specifically, checker bricks are used in the lower part of a blast furnace, where they form the checkerwork or regenerator system. This system helps to preheat the air that is blown into the furnace, which improves the efficiency of the blast furnace process and reduces the amount of fuel needed.
The checkerwork consists of a series of vertical and horizontal channels (also called flues), which alternate to form a grid-like pattern. Coke and iron ore are charged into the furnace and allowed to sink between the checker bricks, while hot gases from the combustion of coke rise up through the channels. The checker bricks absorb heat from the rising gases, which is then transferred to the incoming cold air as it passes through the opposite set of channels. This helps to preheat the air and reduce the amount of fuel required to maintain the necessary temperature inside the blast furnace.
In addition to their thermal insulation properties, checker bricks also provide mechanical stability to the furnace lining and can help to prevent erosion and damage to the refractory materials. Overall, checker bricks play an important role in the efficient operation of a blast furnace, helping to reduce costs and improve the quality of iron produced.
