Lattice brick for blast furnace hot blast stove

Abstract

The invention relates to a lattice brick for a blast furnace hot blast stove. The lattice brick is of a regular hexagonal prism shape in appearance, the vertical distances between two opposite side planes are 230+ / -3mm, an intersected ridge between every two adjacent side planes of the prism is a transition circular arc surface tangent with the side plane, and diameters of side through holes are not smaller than the diameter of a central through hole; and six grooves penetrating through the central through hole and the side through holes are formed in each of the upper and the lower end surfaces of the prism, and the radiuses of the cross sections of the grooves are smaller than 7% of the diameter of the central through hole. The lattice brick has the advantages that the hole pattern is simple, and the structure is compact; furthermore, the stress concentration does not easily occur in the lattice brick, and the side surfaces and the end surfaces are regular and can be applicable to mutual staggered stacking; and the lattice brick is significant for reducing the fracture or interlayer slippage of the lattice brick caused by the stress concentration, prolonging the service life of the hot blast stove and improving the air supply quality of the hot blast stove.

Description

technical field [0001] The invention belongs to the technical field of kilns, in particular to a checker brick for a blast furnace hot blast stove. Background technique [0002] At present, checker bricks used in blast furnace hot blast stoves have thin brick-shaped hole walls and complex structures. , complex structure, coupled with the uneven temperature, pressure, and flow velocity of the airflow between the grid holes, the checker brick is easy to generate stress concentration in it when it is used, which makes the checker brick cracked and damaged, and due to the limitation of the checker brick structure, Checker bricks cannot be built in staggered layers. Checker bricks often slip sideways or horizontally due to cracking, damage, or under the pressure of hot air or hot flue gas. The wall collapses, which affects the normal operation or use of the hot blast stove and greatly shortens the life of the hot blast stove. Secondly, because the checker brick hole wall is thin...

AI Technical Summary

Problems solved by technology

[0002] At present, checker bricks used in blast furnace hot blast stoves have thin brick-shaped hole walls and complex structures. , complex structure, coupled with the uneven temperature, pressure, and flow velocity of the airflow between the grid holes, the checker brick is easy to generate stress concentration in it when it is used, which makes the checker brick cracked and damaged, and due to the limitation of the checker brick structure, Checker bricks cannot be built in staggered layers. Checker bricks often slip sideways or horizontally due to cracking, damage, or under the pressure of hot air or hot flue gas. The wall collapses, which affects the normal operation or use of the hot blast stove and greatly shortens the life of the hot blast stove. Secondly, because the checker brick hole wall is thin, the weight of the heat storage grid per cubic meter of the regenerator is light, making the total heat storage capacity of the hot blast stove small. , resulting in a short period of combustion, air supply and blowdown, which affects the stability of the air supply quality (such as air temperature, air pressure, and air volume) from the hot blast stove to the blast furnace

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