Steel Industry: Bricks for Hot Blast Stove Hot Air Ducts

2. Structural Design: Wedge-shaped + Arc-shaped + Locking Bricks: Balancing load-bearing capacity and sealing, preventing loosening and air leakage.
The spherical dome is a spherical load-bearing structure, which must bear its own weight and resist the internal pressure of the pipe (0.3-0.6MPa), while also preventing hot air leakage. Wedge-shaped bricks, through a precise 3°-5° angle design, form an "arch effect" after construction, converting vertical load into circumferential pressure, distributing it to the straight wall of the pipe, and avoiding local crushing; arc-shaped bricks fit the curvature of the pipe, solving the problem of the connection gap between the spherical dome and the straight wall; the central conical locking brick locks the surrounding wedge-shaped bricks from top to bottom, and is combined with circumferential snap-on locking bricks to form a three-dimensional locking system, which will not loosen even under high pressure. This combined structure ensures tight fit between the bricks, with mortar joints of only 2-3mm, and a leakage rate of ≤0.5%, far superior to ordinary brick types, reducing heat loss and avoiding safety hazards.

3. Customized Design: Adapting to complex spherical surfaces, convenient construction, and long service life.
Different hot air ducts have different diameters and curvatures, and standardized brick types cannot fit the spherical surface. The interlocking bricks can be customized with specific wedge angles and curved radii according to design parameters, ensuring that each brick fits precisely without gaps or voids. The modular main bricks, auxiliary bricks, and locking bricks have uniform dimensions, eliminating the need for complex cutting during construction and improving efficiency compared to traditional irregularly shaped bricks. Furthermore, the bricks boast high strength and durability, reducing production losses due to downtime for maintenance and lowering overall costs.