CN107893135B - A kind of last furnace shell Local Cracking processing method - Google Patents
A kind of last furnace shell Local Cracking processing method Download PDFInfo
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- CN107893135B CN107893135B CN201711217651.6A CN201711217651A CN107893135B CN 107893135 B CN107893135 B CN 107893135B CN 201711217651 A CN201711217651 A CN 201711217651A CN 107893135 B CN107893135 B CN 107893135B
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- cooling wall
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
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- Organic Chemistry (AREA)
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Abstract
The invention belongs to blast furnace maintenance areas, disclose a kind of last furnace shell Local Cracking processing method, economical operation is suddenly seriously affected to solve the problems, such as that prior art blast furnace cooling wall breakage causes blast furnace that cannot keep the safety in production, this method is by making spare cooling wall and standby boiler hull shape into shell wall one cooling wall, and the weld seam of the two is staggered, at work, spare cooling wall is set to be effectively protected the weld seam of spare furnace shell, blast furnace staying chance installs the serious position of craze and transfiguration using shell wall one cooling wall, restore the refrigerating function of this position after installation, the present invention is fixed when removing after needing to change furnace shell and cutting first with stifled burnt plate and last furnace shell, effectively prevent the outflow of furnace charge.The present invention inwardly remove furnace charge when, using the sintered strength support furnace charge of hydrous taphole loam, furnace charge unexpected avalanche when avoiding cleaning, effectively reduce furnace shell again craze and transfiguration the phenomenon that, it is ensured that the safe operation of blast furnace extends blast furnace generation furnace service life.
Description
Technical field
The present invention relates to blast furnace maintenance areas, and in particular to a kind of last furnace shell Local Cracking processing method.
Background technique
Key equipment of the cooling wall as blast furnace is responsible for effectively being completely cut off outside furnace heat and furnace, it is ensured that furnace
Shell temperature is stablized at 30 DEG C hereinafter, furnace labour later period cooling wall damage, furnace shell directly contact gas fluid in blast furnace, and casing temperature increases,
Cracking leakage coal gas or even Strength Failure, furnace body are burnt, and cooling wall once damaging, lose by refrigerating function, and furnace shell is heated rubescent strong
Degree failure, makes blast furnace be forced blowing out medium-capital overhauling.
No. 7 blast furnace dischargeable capacity 2650m3 of wine steel iron-smelter, blast furnace design 15 sections of cooling walls altogether, occur since 2011
Cooling wall breakage, by the end of the year 2016,8 sections of cooling wall breakages reach 48.81%, and 9 sections of cooling wall breakages reach 99.4%, and 10 sections cold
But wall breakage reaches 81.25%.
Since 2014, because cooling wall breakage causes, the caused rubescent cracking of furnace shell increases blast furnace.Blast furnace protects aspect outside
Take the reparation of copper cooling wall pipe root, installation it is chilly, pressure, which makes lining, furnace skin is fetched water, buries the modes such as copper pipe, pressure grouting carries out furnace
Body maintenance, it is interior support to take stop oxygen, limited production, block up the measures such as air port and provided special care to, pass through the measure taken on support within and the outer casing
Certain effect is achieved, but the trend that furnace body deteriorates is not solved.Breaking with cooling wall water pipe since 2016
Damage increases, and furnace Pi Fahong, deformation, cracking phenomena constantly occur.Because blast furnace staying caused by the rubescent cracking of furnace skin reaches 104.5h,
It is that blast furnace safety production and economical operation bring and seriously affect that the furnace body due to caused by cooling wall breakage, which deteriorates, and the prior art can not
It solves the above problems.
Summary of the invention
The purpose of the present invention is to solve prior art blast furnace cooling wall breakages to cause blast furnace that cannot keep the safety in production suddenly sternly
Ghost image rings the problem of economical operation, provides a kind of last furnace shell Local Cracking processing method.
In order to achieve the above object, the invention adopts the following technical scheme:
A kind of last furnace shell Local Cracking processing method, comprising the following steps:
1) according to blast furnace situation and damping down time determine shell deformation position and the damaged cooling wall needed replacing and
The furnace shell size of craze and transfiguration；
2) spare cooling wall and spare furnace shell are made according to the size after determination；
3) after spare cooling wall and spare furnace shell complete, spare cooling wall is mounted on the inside of spare furnace shell, spare
Every side edge of cooling wall is 30-50mm smaller than every side edge of spare furnace shell, and the weld seam of spare cooling wall and spare furnace shell is handed over
Mistake setting, forms shell wall one cooling wall；
4) the furnace shell position scribing line confirmation after blast furnace staying to needing to change, cuts off to furnace shell is needed to change, is needing to change
After the top joint-cutting of furnace shell is cut, it must not will need to change furnace shell and directly remove, need first at the cutting line of top that stifled burnt plate is horizontal
Squeeze into furnace charge, block up the driving depth of coke plate than shell wall one cooling wall thickness more than 50-100mm, and by stifled burnt plate and blast furnace
Furnace shell is welded and fixed, then will be needed to change furnace shell and be rotated down and remove；
5) it needs to change after furnace shell removes, it is inwardly clear according to the size for needing to change furnace shell from stifled burnt plate and lower part cutting line
Except furnace charge, inwardly remove the thickness of furnace charge than shell wall one cooling wall thickness more than 20-50mm, remove after a part in time with having
It is purged again after water stemming material tamping furnace charge；
6) after furnace charge cleans out, the shell wall one cooling wall of new production is installed, first by shell wall one when installation
Lower joint after body cooling wall and excision to just, after to just afterwards the lower part of shell wall one cooling wall fixed with lower joint,
Shell wall one cooling wall is rotated up, when the angle of shell wall one cooling wall and last furnace shell is less than 15 °, excision step 4) in
The stifled burnt plate of installation, then by shell wall one cooling wall and last furnace shell all to just, and with welding rod to shell wall one cooling wall
It is welded with last furnace shell；
7) carrying out the position of opening that pressure makes lining, and makes lining hole after welding on shell wall one cooling wall is shell wall one
The marginal position of body cooling wall, the lining amount of making for making lining hole is 250-300kg, makes lining with a thickness of 300-500mm, makes health 6- after lining
Multiple wind after 8h.
Further, restore the cold of shell wall one cooling wall with high-pressure cooling water in time when making health after serving as a contrast in step 7)
But, and the control of the pressure of high-pressure cooling water is in 1.4-1.6mpa.
Further, pouring material is filled in the gap in step 3) between spare cooling wall and spare furnace shell.
Further, spare cooling wall and spare furnace shell are installed to form shell wall one cooling wall by bolt.
Further, block is set on needing to change the last furnace shell below furnace shell in step 4).
Further, multiple make is provided in the edge of shell wall one cooling wall in step 7) serve as a contrast hole.
Further, the top of shell wall one cooling wall is equipped with hanging ring.
The present invention compared with the existing technology, has the advantages that
Last furnace shell Local Cracking processing method of the invention is by making spare cooling wall and standby boiler hull shape into shell wall
Integrated cooling wall, and the weld seam of the two is staggered, and at work, spare cooling wall is made to be effectively protected the weldering of spare furnace shell
Seam, installs blast furnace staying chance to the serious position of craze and transfiguration using shell wall one cooling wall, restores this after installation
The refrigerating function of position, the present invention are fixed when removing after needing to change furnace shell and cutting first with stifled burnt plate and last furnace shell, effectively
Avoid the outflow of furnace charge.The present invention, using the sintered strength support furnace charge of hydrous taphole loam, is avoided when inwardly removing furnace charge
Furnace charge unexpected avalanche when cleaning.The present invention effectively reduce furnace shell again craze and transfiguration the phenomenon that, it is ensured that the safety of blast furnace
Operation, extends blast furnace generation furnace service life.
Detailed description of the invention
Fig. 1 is the main view of shell wall one cooling wall of the present invention.
Fig. 2 is the side view of shell wall one cooling wall of the present invention.
Fig. 3 is that the present invention needs to change the schematic diagram that furnace shell is not removed.
Fig. 4 is the schematic diagram when present invention needs to change furnace shell dismounting.
Fig. 5 is the schematic diagram that the present invention inwardly removes furnace charge.
Fig. 6 is the schematic diagram of present invention installation shell wall one cooling wall.
Appended drawing reference meaning is as follows: 1. spare furnace shells；2. pouring material；3. spare cooling wall；4. hanging ring;5. shell wall one
Body cooling wall；6. making lining hole；7. block；8. needing to change furnace shell；9. stifled coke plate；10. furnace charge；11. hydrous taphole loam.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
As shown in figures 1 to 6, a kind of last furnace shell Local Cracking processing method, comprising the following steps:
1) according to blast furnace situation and damping down time determine shell deformation position and the damaged cooling wall needed replacing and
The furnace shell size of craze and transfiguration.
2) spare cooling wall 3 and spare furnace shell 1, and spare cooling wall 3 and spare furnace shell 1 are made according to the size after determination
The relative production installation specification of cooling wall and furnace shell need to be followed strictly when production.
3) after spare cooling wall 3 and spare furnace shell 1 complete, spare cooling wall 3 is mounted on spare furnace shell 1 by bolt
Inside, every side edge of spare cooling wall 3 is 30-50mm smaller than every side edge of spare furnace shell 1, spare cooling wall 3 with it is spare
Pouring material 2 is filled in gap between furnace shell 1.And the weld seam of spare cooling wall 3 and spare furnace shell 1 is staggered, and forms shell wall
Integrated cooling wall 5.
4) the furnace shell position scribing line confirmation after blast furnace staying to needing to change, needs to change and sets on the last furnace shell of 8 lower section of furnace shell
Set block 7.It can prevent from needing to change the landing suddenly of furnace shell 8.It is cut off to furnace shell 8 is needed to change, is needing to change the upper of furnace shell 8
After portion's joint-cutting is cut, it must not will need to change furnace shell 8 and directly remove, and need that stifled burnt 9 level of plate will first be squeezed into furnace at the cutting line of top
In material 10, block up the driving depth of coke plate 9 than shell wall one cooling wall 5 thickness more than 50-100mm, and by stifled burnt plate 9 and State of Blast Furnace
Shell is welded and fixed, then will be needed to change furnace shell 8 and be rotated down and remove.
5) need to change after furnace shell 8 removes, from stifled burnt plate 9 and lower part cutting line according to need to change the size of furnace shell 8 to
Interior removing furnace charge 10, inwardly remove furnace charge 10 thickness than shell wall one cooling wall 5 thickness more than 20-50mm, remove a part
It is purged again after consolidating furnace charge with hydrous taphole loam 11 in time afterwards.
6) after furnace charge cleans out, the shell wall one cooling wall 5 of new production is installed, first by shell wall when installation
Integrated cooling wall 5 and the lower joint after excision to just, after to just afterwards the lower part of shell wall one cooling wall 5 consolidated with lower joint
Fixed, the top of shell wall one cooling wall 5 is equipped with hanging ring 4, and wearing hoisting rope from hanging ring 4 is rotated up shell wall one cooling wall 5,
When the angle of shell wall one cooling wall 5 and last furnace shell is less than 15 °, excision step 4) in the stifled burnt plate 9 installed, then by shell
Wall one cooling wall 5 and last furnace shell weld shell wall one cooling wall 5 with last furnace shell with welding rod all to just.
7) carrying out the position of opening that pressure makes lining, and makes lining hole 6 after welding on shell wall one cooling wall 5 is shell wall
The marginal position of integrated cooling wall 5, make lining hole 6 be it is multiple, lining amount of making be 250-300kg, make lining with a thickness of 300-500mm,
It makes and answers wind after serving as a contrast after health 6-8h.Restore the cooling of shell wall one cooling wall 5 when making health after serving as a contrast with high-pressure cooling water in time, and
The pressure of high-pressure cooling water is controlled in 1.4-1.6mpa.
In addition, when determining the furnace shell size of shell deformation position and the damaged cooling wall needed replacing and craze and transfiguration,
It need to consider to overhaul time and spare cooling wall and standby needed for troop replaces the furnace shell and damaged cooling wall of this block craze and transfiguration
Weight when being installed with furnace shell.Because the working space of the type is generally more narrow, it is not available mechanization lifting, is needed when operation
It is had bad luck with cooperations such as jacks to just, so weight general control, within 2t, size just not can guarantee weight greatly very much and furthermore replace
Furnace shell cracking in position is generally accompanied with shell deformation, if too big, new shell wall one cooling wall 5 is unable to ensure after being installed in place
With with regard to furnace shell in the same plane.
Claims (7)
1. a kind of last furnace shell Local Cracking processing method, characterized in that method includes the following steps:
1) damaged cooling wall and cracking for shell deformation position being determined according to blast furnace situation and damping down time and being needed replacing
The furnace shell size of deformation；
2) spare cooling wall (3) and spare furnace shell (1) are made according to the size after determination；
3) after spare cooling wall (3) and spare furnace shell (1) complete, spare cooling wall (3) is mounted on the interior of spare furnace shell (1)
Every side edge of side, spare cooling wall (3) is 30-50mm smaller than every side edge of spare furnace shell (1), and spare cooling wall (3) with
The weld seam of spare furnace shell (1) is staggered, and is formed shell wall one cooling wall (5)；
4) the furnace shell position scribing line confirmation after blast furnace staying to needing to change, cuts off to furnace shell (8) is needed to change, is needing to change furnace
After the top joint-cutting of shell (8) is cut, it must not will need to change furnace shell (8) and directly remove, need first at the cutting line of top by stifled burnt plate
(9) level is squeezed into furnace charge (10), and the driving depth for blocking up coke plate (9) is 50-100mm more than the thickness of shell wall one cooling wall (5),
And stifled burnt plate (9) and last furnace shell are welded and fixed, then furnace shell (8) will be needed to change rotate down and remove；
5) it needs to change after furnace shell (8) removes, according to the size for needing to change furnace shell (8) from stifled burnt plate (9) and lower part cutting line
Furnace charge (10) inwardly are removed, the thickness for inwardly removing furnace charge (10) is 20-50mm more than the thickness of shell wall one cooling wall (5), clearly
Except after a part in time with hydrous taphole loam (11) consolidate furnace charge after be purged again；
6) after furnace charge cleans out, the shell wall one cooling wall (5) of new production is installed, first by shell wall one when installation
Lower joint after cooling wall (5) and excision to just, after to just afterwards the lower part of shell wall one cooling wall (5) and lower joint is solid
Fixed, shell wall one cooling wall (5) is rotated up, and when the angle of shell wall one cooling wall (5) and last furnace shell is less than 15 °, is cut
Except the stifled burnt plate (9) installed in step 4), then by shell wall one cooling wall (5) and last furnace shell all to just, and welding rod is used
Shell wall one cooling wall (5) is welded with last furnace shell；
7) carrying out the position of opening that pressure makes lining, and makes lining hole (6) after welding on shell wall one cooling wall (5) is shell wall
The marginal position of integrated cooling wall (5), the lining amount of making for making lining hole (6) is 250-300kg, makes lining with a thickness of 300-500mm, makes lining
Multiple wind after health 6-8h afterwards.
2. a kind of last furnace shell Local Cracking processing method according to claim 1, it is characterized in that: being made in the step 7)
Restore the cooling of shell wall one cooling wall after lining when health with high-pressure cooling water in time, and the pressure control of high-pressure cooling water exists
1.4-1.6MPa。
3. a kind of last furnace shell Local Cracking processing method according to claim 1, it is characterized in that: in the step 3)
Pouring material (2) are filled in gap between spare cooling wall (3) and spare furnace shell (1).
4. a kind of last furnace shell Local Cracking processing method according to claim 1, it is characterized in that: the spare cooling wall
(3) and spare furnace shell (1) is installed to form shell wall one cooling wall (5) by bolt.
5. a kind of last furnace shell Local Cracking processing method according to claim 1, it is characterized in that: in the step 4)
Need to change setting block (7) on the last furnace shell below furnace shell (8).
6. a kind of last furnace shell Local Cracking processing method according to claim 1, it is characterized in that: in the step 7)
The edge of shell wall one cooling wall (5) is provided with multiple make and serves as a contrast hole (6).
7. a kind of last furnace shell Local Cracking processing method according to claim 1, it is characterized in that: the shell wall is integrally cold
But the top of wall (5) is equipped with hanging ring (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711217651.6A CN107893135B (en) | 2017-11-28 | 2017-11-28 | A kind of last furnace shell Local Cracking processing method |
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| CN201711217651.6A CN107893135B (en) | 2017-11-28 | 2017-11-28 | A kind of last furnace shell Local Cracking processing method |
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| CN107893135B true CN107893135B (en) | 2019-08-06 |
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| CN111702660A (en) * | 2020-06-23 | 2020-09-25 | 宝武装备智能科技有限公司 | Online ultrahigh-pressure water jet cutting method for blast furnace shell and cooling wall |
| CN114622045A (en) * | 2021-12-01 | 2022-06-14 | 武汉科技大学 | Method for reducing temperature of blast furnace shell by using cooling column and cooling plate |
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