Application of 7-Hole, 19-Hole, 31-Hole and 37-Hole Checker Bricks in Hot Blast Furnaces
Lattice brick, this term may not be common in the daily life of ordinary people, but in the iron-making industry, it is widely recognized and accepted as a heat transfer and heat storage body with many superior thermal characteristics such as strong heat exchange capacity, large heat storage area, smooth ventilation, and low resistance. Rongsheng Checker Bricks, English name Lattice brick, is a heat transfer medium, mainly used in the upper and middle parts of the heat storage chamber of the hot blast furnace to store heat. In the process of heating cold air into hot air, lattice brick plays an extremely important role.
7-Hole, 19-Hole, 31-Hole and 37-Hole Hot Blast Furnace Checker Bricks
Checker bricks, the name may sound a bit mysterious, but it actually plays a very important role in industry. In hot blast furnaces, glass kilns and coke oven regenerators, it is like a passionate heat transfer messenger, helping hot and cold gases to complete heat exchange.
So, what is so special about checker bricks? First of all, its design is very clever, with bricks with grid holes arranged in an orderly manner. These grid holes allow hot and cold gases to pass freely, thereby achieving efficient heat exchange.
The characteristics of checker bricks are also quite significant:
- Strong heat exchange capacity: can quickly transfer heat to cold gas.
- Large heat storage area: store more heat and reduce energy consumption.
- Smooth ventilation: ensure smooth passage of gas without affecting heat exchange.
- Good volume stability: can maintain the shape even at high temperatures.
- High-temperature load creep performance: the performance remains stable under high temperatures and high load.
According to the material classification, checker bricks can be divided into clay, high alumina, mullite, silica and sillimanite and other types. And according to the specification classification, there are 7 holes, 19 holes, 31 holes and 37 holes and other options.
Whether in hot blast furnaces, glass kilns or coke oven regenerators, checker bricks are an indispensable part. It not only affects the operating efficiency of the entire system, but also directly affects the safety and stability of production. Therefore, choosing the right checker brick is a crucial decision for every industrial producer.
The Volume Stability of the Hot Blast Furnace Checker Brick is Good
The checker brick has multiple transparent grid holes parallel to the side surface, as well as positioning protrusions and positioning grooves on two parallel surfaces. These designs not only make it ventilated smoothly and with low resistance, but also greatly enhance its heat exchange capacity and heat storage area. In addition, the checker brick has good volume stability, excellent high temperature load creep performance, high density and low porosity, which enables it to maintain excellent performance under high temperature and high pressure working environment.
Blast furnace hot blast furnaces usually adopt a checker brick regenerator structure, which transfers heat to the checker bricks by passing the high temperature flue gas after combustion through the holes of the checker bricks. Then during the air supply period, the cold air is heated into hot air through the checker bricks, and then sent to the blast furnace through the hot air pipe for combustion reaction. The aperture and heating area of the checker bricks have a direct impact on the performance of the hot blast furnace. The old blast furnace hot blast furnace uses standard checker bricks with an aperture of 40 mm and a heating area of 32.7 square meters per cubic meter. The Kalugin top-fired hot blast furnace uses checker bricks with smaller apertures and larger heating areas, such as checker bricks with an aperture of 30 mm and a heating area of 48 square meters per cubic meter, and checker bricks with an aperture of 20 mm and a heating area of 64 square meters per cubic meter. These improvements not only improve the thermal efficiency of the hot blast furnace, but also significantly reduce the amount of refractory materials used and investment costs of the hot blast furnace.
With the technological development of the ironmaking industry in the metallurgical industry, increasing the air temperature of the hot blast furnace has become an important measure. The technological development of the Kalugin top-fired hot blast furnace has enabled the maximum air temperature of the blast furnace hot blast furnace to reach 1350 degrees. Under this trend, 20 mm aperture checker bricks have become the first choice for modern hot blast furnaces due to their higher heating area and lower dosage. In blast furnace hot blast furnaces in Russia, China, Kazakhstan, Ukraine and other places, 20 mm aperture checker bricks have been widely used.
The application of checker bricks is not limited to blast furnace hot blast furnaces, it is also used in other industrial fields such as flame furnaces. According to different temperature zones and technical requirements, checker bricks of different materials are generally selected, such as siliceous checker bricks, clay bricks, high alumina bricks, mullite bricks, sillimanite bricks, etc. These checker bricks provide strong heat exchange and heat storage capacity for industrial production with their unique structure and performance.
In general, checker bricks have become an indispensable and important material in the ironmaking industry with their superior thermal properties and wide application fields. Its design and application not only reflect the continuous exploration and innovation of human beings in industrial technology, but also provide more possibilities and opportunities for our future industrial production. Contact Rongsheng for more information.