How to lay facing bricks in a hot blast furnace regenerator?

According to various layouts and designs of the combustion chamber and regenerator of the hot blast furnace, Hot blast furnace can be divided into three main design forms: internal combustion hot blast furnace, external combustion hot blast furnace and top combustion hot blast furnace. Below is information about the method of laying a hot blast furnace regenerator.

Preparation before laying control bricks

Before laying facing bricks, it is necessary to level the bottom of the oven. First align the ring belt under the wall. Starting to lay facing refractory bricks, align it again. Before laying the wires, the area of ​​the leveling layer must be solid.

Hot Blast Furnace Regenerator

When laying the internal combustion hot blast furnace regenerator according to the spray center line, draw a vertical center line from the thermocouple hole at the top of the furnace, position the center line at the bottom of the oven, and then mark the regenerator on the surface with spray paint layer The transverse center line widens as the height of the masonry increases.

Hot Blast Furnace Regenerator with External Roasting

Installation of an external combustion blow furnace regenerator follows the same steps, as for an internal combustion furnace. First take the center spray line as a guide, mark the transverse center line of the stove body on the surface of the spray coating layer and widen it as the masonry height increases.

Regenerator wall design

When constructing the regenerator wall, it is necessary to check the verticality and curvature of the wall and composite bricks in the holes under the furnace grate, as well as their compliance with design and construction requirements. Composite bricks in openings cannot be covered after construction is completed.

Internal combustion guard

Internal combustion type guard is sprayed first, and then control bricks are laid. When constructing multi-ring walls, the bricks of the inner ring should be laid first, and the bricks of the outer ring should fit snugly against the control bricks of the inner ring. The gap between the facing brick and the coating should be filled with asbestos board or putty, and the top surface of the putty should be no lower than, than on 500 mm below the masonry surface.

Masonry walls of a hot external combustion blast furnace

When constructing the wall of a hot blast furnace with external firing, the structure must be carried out in accordance with the center line. A wall, consisting of several rings, erected from the laying of the outer ring to the laying of the inner ring. During masonry work, it is necessary to confirm the flatness of the inner radius of the masonry. When making inner ring bricks, mark the height of the masonry on the insulating layer of the fire brick.

Housing of hot blast furnace internal and external combustion

Whenever the internal and external combustion hot blast furnace body is rotated, expansion joints and sliding joints of the upper and lower masonry sections of the surrounding walls must be reserved in accordance with the design requirements, and the surface of each section of the base plate must be leveled with fireproof materials.
Regenerator mesh bricks usually use seven-hole mesh bricks. During construction, each layer should be placed in a checkerboard pattern., and the top and bottom holes of the mesh should be aligned. Staggered bricks along the edges and at wall joints must be pre-classified and marked according to design dimensions before construction begins. During construction, staggered bricks are laid in order and in different sizes according to the construction drawings.