Lattice brick for blast furnace hot blast stove

A checkered brick and hot blast stove technology, applied in the field of kilns, can solve the problems of uneven airflow temperature, pressure, flow rate, checkered brick cracking and damage, fire well wall collapse, etc., so as to reduce cracking or interlayer slip, side and The end face is regular and the effect of stress concentration is not easy

Inactive Publication Date: 2016-05-25
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Lattice brick for blast furnace hot blast stove
  • Lattice brick for blast furnace hot blast stove
  • Lattice brick for blast furnace hot blast stove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: In the staggered-layer circular paving method of the present invention, the checker brick is made of magnesia siliceous olivine, and its composition is 2MgO SiO 2 content of 96%, the radius of the transition arc of prism 1 is 12mm, and the vertical distance between the opposite sides of the hexagon is 230mm. Two kinds of checker bricks are used for masonry, one is the end face distance and each side The whole height brick is 230mm in height, and the other is the half-height brick with the distance between the end face and the height of each side being 115mm. At the center of the circle, half-height bricks are paved on each side, full-height bricks are paved on the outer ring side of the half-height bricks, and half-height bricks are paved on the outer ring of the full-height bricks, and the paving is repeated in turn until it reaches the hot blast furnace wall , using conventional technology to fill the gaps between the checker bricks and the hot blast sto...

Embodiment 2

[0018] Embodiment two: the staggered layer in-line paving method of the present invention, the material of checker brick is magnesia siliceous olivine, and its composition 2MgO·SiO 2 The content is 96%. The full-height brick with the distance between the end face and the height of each side is 230mm. After cutting, it is processed into an adjusted brick whose height and the height of each side are half the height of the full-height brick. The center of the circular section of the furnace and the straight line that divides the hot blast stove fire well wall into two symmetrical parts are the reference line. A full-height brick is laid from the hot blast furnace wall as the starting brick, and then a row of full-height bricks is laid in sequence along the reference line until the hot blast The wall of the furnace well is used as the reference row, and then a row of adjustment bricks is paved on both sides of it, and then the whole height bricks are paved respectively, and the pav...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B9/06
CPCC21B9/06
Inventor 王振峰
Owner ZHENGZHOU UNIV
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