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Cross construction method of replacing furnace shells and cooling walls of blast furnaces

A blast furnace shell and cross-construction technology, which is applied to blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as long construction time, achieve the effect of compressing the construction period, shortening the main line construction period, and realizing cross-construction

Active Publication Date: 2015-12-30
ANHUI MA STEEL EQUIP MAINTENANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of long construction time in the process of blast furnace shell replacement and stave replacement in the prior art, the present invention provides a cross-construction method for blast furnace shell replacement and stave replacement

Method used

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  • Cross construction method of replacing furnace shells and cooling walls of blast furnaces
  • Cross construction method of replacing furnace shells and cooling walls of blast furnaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In order to improve the efficiency of blast furnace maintenance and improve the production efficiency of the enterprise, a steel factory proposes a cross-construction method of blast furnace shell replacement and stave replacement. The steps are as follows:

[0038] A. Divide each ring of furnace shell to be replaced; because the height of each stave is fixed, and the height of each ring of staves is also fixed, then, for different blast furnaces, the height of each ring of staves is different. The height of the circle furnace shell is the same as that of each circle of staves. Each circle of furnace shell is divided into 8, 10 or 12 pieces. If the furnace shell is divided into more pieces, it will be necessary to replace multiple pieces of furnace shell, which will delay the construction period of the main line. , if the furnace shell is divided into fewer pieces, when replacing each piece of furnace shell, it will affect the overall structural strength of the blast fur...

Embodiment 2

[0051] Such as figure 1 , the furnace shell 1 is the furnace shell to be replaced, the stave 1 2 is the stave to be replaced at the position of the furnace shell, the stave 2 3 and the stave 3 4 are the staves to be replaced, the stave 4 5 and the stave 5 6 For non-replaceable staves.

[0052] Such as figure 2 , the furnace shell 1 is divided into an upper ring furnace shell 11 and a lower ring furnace shell 12, both of which are divided into 8 pieces, and the upper ring furnace shell 11 is correspondingly divided into an upper block furnace shell 19, an upper block furnace shell Two 13, upper block furnace shell three 15, upper block furnace shell four 17, upper block furnace shell five 29, upper block furnace shell six 23, upper block furnace shell seven 25, upper block furnace shell eight 27 ;

[0053] The lower ring furnace shell 12 is correspondingly divided into lower block furnace shell one 110, lower block furnace shell two 14, lower block furnace shell three 16, l...

Embodiment 3

[0062] Overhaul of a certain number blast furnace of a steel company, replacing the 8th to 13th floor staves and the two rings of the furnace shell at the position of the 9th to 12th floor staves, the specific steps are:

[0063] 1. Shut off the wind, fetch water and cool the stove on the lowering surface;

[0064] 2. Straight blowing pipe, small and medium-sized sets are disassembled, and the griddle is dismantled, and the water pipe pad is dismantled and the 7-shaped board is welded at the same time;

[0065] 3. Assemble the movable hanging pan and hoisting ring beam in the furnace and put it in place;

[0066] 4. Remove staves from the 11th floor to the 8th floor;

[0067] 5. Lift the tray to the lower edge of the 12th floor stave, replace the 12th and 13th floor staves and replace the furnace shell at the 9th-11th floor stave;

[0068] 6. The 12th and 13th layers of stave mats are welded, and the furnace shell is continued to be replaced at the same time;

[0069] 7. Af...

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Abstract

The invention discloses a cross construction method of replacing furnace shells and cooling walls of blast furnaces and belongs to the technical field of construction of the blast furnaces. The cross construction method comprises the following steps: A, dividing each ring of furnace shell to be replaced into equal blocks, then dismounting and replacing the ring of furnace shell; B, determining a furnace shell replacing and constructing sequence; C, descending charging level, damping down, fetching water and cooling the furnaces; D, dismounting straight blasting pipes and medium-small sleeves, scrabbling the furnaces, simultaneously dismounting cooling water pipes of cooling walls of the furnace shells to be replaced and welding inverted-L-shaped plates on the furnace shells; E, assembling movable hoisting disks and hoisting annular beams in the furnaces; F, dismounting the cooling walls, instantly beginning to replace the furnace shells which are divided into blocks in the step B in the upper rings, the lower rings and the opposite perforated positions at the same time, and welding the furnace shells at the exterior; and G, firstly welding the inner welding seams in the furnace shells and finally welding the outer welding seams of the furnace shells which are divided into blocks for the finally-mounted furnace shells which are divided into blocks. According to the method, the sequence of replacing the overall furnace shells which are divided into blocks can be optimized, the sequence of replacing the furnace shells and the cooling walls can also be optimized, the cross construction of the furnace shells and the cooling walls can be implemented to the greatest extent; the main line construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of blast furnace construction, in particular to a cross construction method for blast furnace shell replacement and stave replacement. Background technique [0002] After the blast furnace has been used for a certain number of years, due to the damage of the stave, the furnace shell will bulge due to deformation, or part of the furnace shell needs to be replaced due to renovation. The usual construction sequence is to remove the stave → replace the furnace shell → install the stave. This construction method takes time It is relatively long, and when the furnace shell is replaced in pieces, if the method of first changing one circle and then changing the second circle is used, the amount of welding required is also very large. If most of the furnace shell is replaced, the furnace shell can be replaced in a whole circle, but this method requires Large-scale hoisting tools and large-scale temporary facilities a...

Claims

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Application Information

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IPC IPC(8): C21B7/00
Inventor 章锐师志民王斌
Owner ANHUI MA STEEL EQUIP MAINTENANCE CO LTD
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