Curved fire brick is a semi arc refractory brick. One end of the arc is a semicircle, the other end is a groove and it can be built into circles of different diameters according to actual conditions. This product is very suitable for masonry of circular furnace linings with tonnage of 10-200 tons such as ladles, teeming ladles and molten iron transfer ladles. The furnace lining built with this brick fits tightly. Adding refractory mortar during masonry can also fill the mortar joints and increase the saturation.
Both fireclay curved bricks(traditional) and high alumina curved fire bricks(upgraded) provide stability for kilns. The fireclay bricks are more cost-effective while require more frequent replacements. And the high alumina bricks offer higher refractoriness and stability, with a service life 210% longer than it. You can choose freely based on your project requirements.
Easier Installation
The rounded corner design of curved fire bricks facilitates adjustments during installation. Workers can move the bricks to match the required curve. Brick joints can be controlled within 1 mm, which ensures smooth and uniform lining. This effectively shortens construction period and reduces installation errors.
Less Consumption
Compared to other shapes, using curved bricks can reduce consumption and save on quantity. Because it has a better structural fit with round steel kilns, which is less prone to cracking and peeling. Furthermore, high alumina curved firebricks are less susceptible to corrosion from molten steel and slag. Overall, using curved bricks results in less replacements and requiring fewer refractory bricks.
Longer Service Life
Compared to standard refractory bricks (230x114x65mm), curved refractory bricks reduce vertical gaps by 70%! Smaller gaps limit the vertical movement of molten steel within the gaps. This protects the ladle lining from corrosion, reducing cracking and subsequent maintenance issues. You can use the kiln for longer time!
Higher Molten Steel Purity
The use of high alumina curved bricks reduces secondary contamination of the molten steel Because of the non-peeling property, it does not introduce impurities into the product. Besides, the tighter construction of curved bricks with fewer joints allows less molten steel to intrude into the gaps. This extends the service life of the ladle lining and improves the stability of ladle performance.
Larger Capacity
Each batch of curved refractory bricks is custom-made to fit the circular kiln lining perfectly. While standard refractory bricks require increased thickness to facilitate subsequent cutting or adjustments. More importantly, the stress will not concentrate at the brick joints or corners. In short, the reduced lining thickness also helps increase the effective capacity of the kiln. This is a direct advantage for customers looking to increase production and efficiency.
Main Types and Applications of Curved Fire Brick
Types of Curved Fire Brick
Currently, KERUI commonly produces curved refractory bricks in 16 different thicknesses and 9 different laying diameters. We typically categorize them by laying diameter from smallest to largest: C19, C20, C21, C22, C23, C25 C27. If you are interested in any particular type, please contact us immediately for more details.
Application of Curved Fire Brick
In addition, it is also widely used in blast furnaces, electric furnaces, hot blast furnaces, thermal boilers, glass kilns, cement kilns, fertilizer gasification furnaces, casting and steel pouring bricks, etc.
As a refractory manufacturer with more than 20 years of experience, KERUI has accumulated deep technical expertise in designing and producing high-precision curved fire bricks. With our advanced forming equipment, CNC cutting systems, and strict dimension-control procedures, we ensure consistent quality and accurate brick geometry for every order.
Professional Construction
Beyond production, our engineering team also provides professional on-site guidance, including installation layout, masonry instructions, joint-control standards, and troubleshooting during construction. This ensures that each project achieves optimal lining performance, longer service life, and stable furnace operation.
Kerui Curved Fire Bricks
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Masonry of Curved Firebrick
The masonry of curved fire bricks is usually to lay them one ring at a time in a climbing manner. This process is similar to the step-by-step method, not built layer by layer.
Before workers use this brick on your high-temperature kiln, it is usually necessary to use starting bricks to adjust the teeming ladles of different diameters to ensure the flatness and roundness of the masonry.
