CN110527759A - A method of prevent blast furnace taphole from leaking coal gas - Google Patents
A method of prevent blast furnace taphole from leaking coal gas Download PDFInfo
- Publication number
- CN110527759A CN110527759A CN201810647949.9A CN201810647949A CN110527759A CN 110527759 A CN110527759 A CN 110527759A CN 201810647949 A CN201810647949 A CN 201810647949A CN 110527759 A CN110527759 A CN 110527759A
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- China
- Prior art keywords
- blast furnace
- cupola well
- iron mouth
- coal gas
- mud jacking
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
Abstract
The present invention provides a kind of method for preventing blast furnace taphole leakage coal gas, comprises the following steps that and carries out mud jacking filling tuyere medium sleeve, big set surrounding hole region to tuyere medium sleeve, the former reserved mud jacking hole of big set；Aperture mud jacking is carried out to furnace shell under tuyere big sleeve, between the filling cooling wall and cupola well brick fuel or gap between cupola well brick fuel and cupola well brick fuel；Aperture mud jacking is carried out to the cooling wall under tuyere big sleeve between the domain of iron mouth region, between the filling cooling wall and cupola well brick fuel or gap between cupola well brick fuel and cupola well brick fuel；Aperture mud jacking is carried out to iron mouth (including taphole frame) region.By taking different filling measures to the gap between cupola well-different position in iron mouth region domain, blast furnace taphole gas fire is set obviously to die down or even be completely cured, the stability of stokehold iron mouth state is improved, and also avoids blast furnace crucibe region especially cooling wall side wall because there are air gaps to be in the presence of that heat transfer is obstructed.
Description
Technical field
The invention belongs to blast furnace technology technical fields, are related to a kind of method for preventing blast furnace taphole leakage coal gas.
Background technique
At present all there is different degrees of leakage coal gas phenomenon in blast furnace taphole substantially, and serious iron mouth gas fire is in rigidity, fire
Seedling is long more up to 1000mm, seriously jeopardizes the conventional maintenance and prolonging campaign of iron mouth, casthouse equipment especially mud gun nozzle.It is existing
Improvement of the technology for iron mouth leakage coal gas, be the administering methods such as handle in iron mouth region domain mud jacking or iron mouth casting to be blocked, but
Still there is different degrees of leakage coal gas phenomenon, give blast furnace manager, iron mouth maintenance personnel causes to puzzle.
Summary of the invention
In view of the problems of the existing technology, we have found the generation of blast furnace gas leakage by the continuous observation at scene
Place is burning convolution region before air port, and is analyzed from cupola well-iron mouth region domain-functionalities, and iron mouth region domain itself does not generate blast furnace coal
Gas, only a slag iron, coal gas discharge outlet, therefore suspect it is because of tuyere medium sleeve, big set, furnace shell, cooling wall, brick fuel and Tie Kou
There are internal connection gaps between the iron mouth modular tile in region, the channel Tie Kou, and coal gas is just caused to pass through tuyere medium sleeve, big set, edge
Gap between furnace shell and cooling wall or between cooling wall and cupola well brick fuel or between brick fuel and brick fuel reach iron mouth region domain
Again toward outward leakage.Blast furnace taphole leaks coal gas in order to prevent, by taking the gap between cupola well-different position in iron mouth region domain
Different filling measures obtains a kind of method for efficiently preventing blast furnace taphole leakage coal gas, by this hair by repeatedly practising and summarizing
Bright method, blast furnace taphole gas fire obviously die down or even are completely cured, and the stability of stokehold iron mouth state is improved, and also avoid
Blast furnace crucibe region especially cooling wall side wall is because there are air gaps to be in the presence of that heat transfer is obstructed.
Blast furnace taphole leaks coal gas in order to prevent, and the present invention provides a kind of method for preventing blast furnace taphole leakage coal gas, step
It is as follows:
Step 1: to tuyere medium sleeve, the former reserved mud jacking hole progress mud jacking of big set, filling tuyere medium sleeve, big set surrounding hole region,
Coal gas is toward coal gas is altered in square iron mouth region domain down between furnace shell and cooling wall in cutting blast furnace；
Step 2: carrying out aperture mud jacking to furnace shell under tuyere big sleeve, mud jacking hole is positioned at the installation gap between two cooling walls, right
Between the hot face of cooling wall, i.e. cooling wall and cupola well brick fuel or the gap between cupola well brick fuel and cupola well brick fuel is filled, cutting
Coal gas is along the iron mouth region domain gas blowby between cooling wall and cupola well brick fuel down in blast furnace；
Step 3: carrying out aperture mud jacking to the cooling wall under tuyere big sleeve between the domain of iron mouth region, it is cooling that mud jacking hole is positioned at two
Installation gap between wall, to the hot face of cooling wall, i.e., between cooling wall and cupola well brick fuel or between cupola well brick fuel and cupola well brick fuel
Gap be filled, cut off in blast furnace coal gas along square iron mouth region domain gas blowby down between cooling wall and cupola well brick fuel；
Step 4: carrying out aperture mud jacking to iron mouth (including taphole frame) region, it is therefore an objective to cut off coal gas in blast furnace and pass through taphole frame
Gap between iron mouth modular tile or between iron mouth modular tile gap is toward iron mouth pore passage gas blowby；
Further, if modular tile badly broken in taphole frame, damaged part modular tile can be pulled down, is cleaned out, then adopt
Corundum pouring material is taken to carry out integrated poured.
Further, the first step grouting material is that High-Alumina is pressed into mud.
Further, the second step to the 4th step grouting material is that carbon is pressed into mud.
To ensure blast furnace natural labor, the step is carried out using blast furnace staying chance or periodical repair chance substep, because described in
Operation all refers to high temperature, and appliances for labor protection should have been dressed before operation, prevents from scalding.
The beneficial effects of the present invention are: first and second step uses phase therewith to the hot face of cooling wall, huyashi-chuuka (cold chinese-style noodles) from source
Applicable different mud jacking materials are filled, and have the function that separate coal gas square iron mouth region domain gas blowby down, third and fourth described step
Iron mouth pore passage area above gas blowby is separated, coal gas gas blowby and the gas leakage in iron mouth region domain are prevented from source, makes iron mouth
Gas fire obviously die down or even be completely cured, the stability of stokehold iron mouth state is greatly enhanced, and blast furnace crucibe region is especially
Originally in the hot face of cooling wall, there are air gaps, and side wall temperatures is caused promotion restriction blast furnace maintenance height occur because occurring conducting heat being obstructed often
Intensity smelt situation be improved significantly；Except tuyere medium sleeve, big set region are filled solidification using High-Alumina indentation mud
Outside, other regions use carbon to be pressed into mud, except can reach blind, improve outside heat-transfer effect effect, because it is with liquid
In the presence of the unimpeded state of tapping is preferable, can repeatedly use.The present invention can use long period periodical repair (24~30 hours)
Or multiple 10~20 hours damping down chances carry out stereoscopic multi-layer time aperture, mud jacking, ensure that the normal production of blast furnace.
Detailed description of the invention
Fig. 1 is cupola well iron mouth-air port regional structure schematic diagram
Fig. 2 is the side view of Fig. 1.
In figure: covering 6- big set mud jacking in mud jacking hole in 1- furnace shell 2- tuyere big sleeve 3- tuyere medium sleeve 4- tuyere small sleeve 5-
Aperture 10- cooling wall 11- cupola well cooling wall aperture 12- iron mouth under the big set of hole 7- tuyere combined brick 8- carbonaceous ramming mass 9-
Frame 13- iron mouth neck aperture 14- iron mouth pore passage 15- iron mouth modular tile 16- brick fuel.
Specific embodiment
Below with reference to embodiment, the present invention is further described.
Referring to Fig. 1, Fig. 2, a method of prevent blast furnace taphole from leaking coal gas, processing step is:
Step 1: carrying out mud jacking, the combination of filling air port to tuyere medium sleeve mud jacking hole 5, big set mud jacking hole 6 using blast furnace staying chance
Brick 7 and tuyere big sleeve 2, tuyere medium sleeve 3,4 surrounding hole region of tuyere small sleeve cut off coal gas in blast furnace and pass through furnace shell 1 and cooling
Gap is toward iron mouth region domain gas blowby between wall 10；Being pressed into material is that High-Alumina is pressed into mud.When blast furnace newly replaces tuyere medium sleeve 3 every time
It must adhere to mud jacking；Blast furnace unloads bulb-blowing machine meeting every time, should open tuyere medium sleeve mud jacking hole 5, big set mud jacking hole 6 carries out daily dimension
Mud jacking is protected, air port peripheral region is promoted to keep secret room throughout the year.
Step 2: carrying out mud jacking to aperture 9 under tuyere big sleeve using blast furnace periodical repair chance, it is cooling that mud jacking hole is positioned at cupola well
Between wall 10, to the hot face of cooling wall, i.e., between cooling wall 10 and cupola well brick fuel 16 or between cupola well brick fuel 16 and cupola well brick fuel 16
Gap be filled, it is past along 8 gaps of carbonaceous ramming mass former between cooling wall 10 and cupola well brick fuel 16 to cut off coal gas in blast furnace
Iron mouth region domain gas blowby；It is pressed into material carbon and is pressed into mud.If the gas fire of all iron mouths is all substantially identical, under tuyere big sleeve
9 mud jacking of aperture is contemplated that first to the lower progress aperture mud jacking of 4~6 above each iron mouth big set；If effect is unobvious, answer
Aperture mud jacking will be all carried out under all air ports, under air port cupola well region formed a whole ring belt to from top to bottom alter coal
Gas is separated.
First and second step is comprehensive treatment the first line of defence, uses phase therewith to the hot face of cooling wall 10, huyashi-chuuka (cold chinese-style noodles) from source
Applicable different mud jacking materials are filled, and are reached the cupola well region under air port and are separated coal gas often iron mouth region domain gas blowby.
Step 3: covering lower cupola well cooling wall aperture 11 between aperture 9 and iron mouth region domain to big using blast furnace periodical repair chance
Mud jacking is carried out, mud jacking hole is positioned between two cooling walls, to the hot face of cooling wall, i.e., between cooling wall 10 and cupola well brick fuel 16 or furnace
There may be hole regions to be filled between 16 gap of cylinder brick fuel, and coal gas is along cooling wall 10 and cupola well brick fuel in cutting blast furnace
Toward iron mouth modular tile 15,14 gas blowby of iron mouth pore passage between 16；It is pressed into material carbon and is pressed into mud.The mud jacking of one's respective area, generally with
Centered on iron mouth, increase the number of openings to left and right, widens mud jacking radiation scope on cupola well is lateral.
Step 4: carrying out mud jacking to iron mouth neck aperture 13 using blast furnace periodical repair chance, position of opening requires to be greater than iron mouth
1 150~200mm of continuous line welding gap of neck aperture 13 and last furnace shell.Purpose is turned off coal gas in blast furnace and passes through taphole frame
Between 12 and iron mouth modular tile 15 between gap or iron mouth modular tile 15 gap toward 14 gas blowby of iron mouth pore passage；The indentation of material carbon
Mud.
Third and fourth step separates 14 area above gas blowby of tapping hole duct to administer second defence line.
Step 5: damaged part modular tile can be pulled down if modular tile badly broken in taphole frame 12, it is peace and quiet, then adopt
Corundum pouring material is taken to carry out integrated poured.Modular tile breakage in taphole frame 12, daily difficulty is estimated, in addition needing after casting
When being conserved, therefore executing this operation, need to select to carry out at periodical repair (24~30 hours) of the long period.
The operation all refers to high temperature, and appliances for labor protection should have been dressed before operation, prevents from scalding.
Embodiment:
At present in certain steel enterprise 3200m3Blast furnace application, for iron mouth gas fire in rigidity, flare is up to more than 1000 mm, fire before
As burning torch, iron mouth tapping is often accompanied by splash for seedling end, and not only to mud gun nozzle, there are security risks, and iron mouth difficulty is tieed up
Shield, iron mouth lower sidewalls temperature repeatedly reach 660 DEG C or more, and blast furnace is forced damping down and blocks up air port, and reduces smelting and operate by force, to production
Restriction clearly.Once individual taphole frame casting was repeatedly carried out, tuyere medium sleeve mud jacking, effect cannot continue.Using
After the present invention, iron mouth leakage coal gas situation is improved, and eliminates air gap, improves the heat transfer between brick fuel and cooling wall, is solved
In addition to side wall temperatures height is to the restriction of production.
The present invention can use long period periodical repair or multiple 10~20 hours damping down chances carry out the synthesis such as aperture, mud jacking
It administers.Governing system, effect is good, can promote iron mouth gas fire and obviously dies down or even be completely cured, the stability of stokehold iron mouth state
Be improved, blast furnace crucibe region especially originally in the hot face of cooling wall there are air gap, cause side wall temperatures because appearance conduct heat by
Resistance be often in the presence of promotion restrict blast furnace maintain high-intensitive smelting be improved significantly.
Claims (5)
1. a kind of method for preventing blast furnace taphole leakage coal gas, includes the following steps:
Step 1: to tuyere medium sleeve, the former reserved mud jacking hole progress mud jacking of big set, filling tuyere medium sleeve, big set surrounding hole region,
Coal gas is toward coal gas is altered in square iron mouth region domain down between furnace shell and cooling wall in cutting blast furnace；
Step 2: carrying out aperture mud jacking to furnace shell under tuyere big sleeve, mud jacking hole is positioned at the installation gap between two cooling walls, right
Between the hot face of cooling wall, i.e. cooling wall and cupola well brick fuel or the gap between cupola well brick fuel and cupola well brick fuel is filled, cutting
Coal gas is along the iron mouth region domain gas blowby between cooling wall and cupola well brick fuel down in blast furnace；
Step 3: carrying out aperture mud jacking to the cooling wall under tuyere big sleeve between the domain of iron mouth region, it is cooling that mud jacking hole is positioned at two
Installation gap between wall, to the hot face of cooling wall, i.e., between cooling wall and cupola well brick fuel or between cupola well brick fuel and cupola well brick fuel
Gap be filled, cut off in blast furnace coal gas along square iron mouth region domain gas blowby down between cooling wall and cupola well brick fuel；
Step 4: carrying out aperture mud jacking to iron mouth (including taphole frame) region, it is therefore an objective to cut off coal gas in blast furnace and pass through taphole frame
Gap between iron mouth modular tile or between iron mouth modular tile gap is toward iron mouth pore passage gas blowby.
2. a kind of a kind of method for preventing blast furnace taphole leakage coal gas as described in claim 1, it is characterized in that: it further include walking as follows
Suddenly, the modular tile for clearing up badly broken in taphole frame takes corundum pouring material to carry out taphole frame integrated poured.
3. a kind of a kind of method for preventing blast furnace taphole leakage coal gas as claimed in claim 1 or 2, it is characterized in that: described first
Walking grouting material is that High-Alumina is pressed into mud.
4. a kind of a kind of method for preventing blast furnace taphole leakage coal gas as claimed in claim 3, it is characterized in that: the second step is extremely
4th step grouting material is that carbon is pressed into mud.
5. a kind of a kind of method for preventing blast furnace taphole leakage coal gas as claimed in claim 1 or 2, it is characterized in that: the step
Carried out using blast furnace staying chance or periodical repair chance substep.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810647949.9A CN110527759A (en) | 2018-06-22 | 2018-06-22 | A method of prevent blast furnace taphole from leaking coal gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810647949.9A CN110527759A (en) | 2018-06-22 | 2018-06-22 | A method of prevent blast furnace taphole from leaking coal gas |
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| CN110527759A true CN110527759A (en) | 2019-12-03 |
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| CN201810647949.9A Pending CN110527759A (en) | 2018-06-22 | 2018-06-22 | A method of prevent blast furnace taphole from leaking coal gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112123544A (en) * | 2020-09-19 | 2020-12-25 | 河南华西耐火材料有限公司 | Construction method of integrated full-cast refractory structure applied to blast furnace lining |
| CN113088592A (en) * | 2021-04-08 | 2021-07-09 | 包头市安德窑炉科技有限公司 | Online grouting process for cold and hot surfaces of blast furnace |
| CN114576447A (en) * | 2022-01-29 | 2022-06-03 | 北京首钢股份有限公司 | Sealing structure of blast furnace tuyere and installation method |
| CN114891940A (en) * | 2022-04-18 | 2022-08-12 | 大连科萌工程材料有限公司 | Method for hot-face grouting of blast furnace carbon brick |
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| CN102392086A (en) * | 2011-11-21 | 2012-03-28 | 安阳钢铁股份有限公司 | Large blast furnace body gas leakage prevention method |
| CN102912050A (en) * | 2012-10-30 | 2013-02-06 | 鞍钢股份有限公司 | Freeze protection method for material ramming and mud jacking of cooling wall in winter overhaul of blast furnace |
| CN203904374U (en) * | 2014-06-25 | 2014-10-29 | 中冶京诚工程技术有限公司 | Maintenance structure for simultaneously grouting cold and hot surfaces of cooling wall of blast furnace cylinder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112123544A (en) * | 2020-09-19 | 2020-12-25 | 河南华西耐火材料有限公司 | Construction method of integrated full-cast refractory structure applied to blast furnace lining |
| CN113088592A (en) * | 2021-04-08 | 2021-07-09 | 包头市安德窑炉科技有限公司 | Online grouting process for cold and hot surfaces of blast furnace |
| CN114576447A (en) * | 2022-01-29 | 2022-06-03 | 北京首钢股份有限公司 | Sealing structure of blast furnace tuyere and installation method |
| CN114891940A (en) * | 2022-04-18 | 2022-08-12 | 大连科萌工程材料有限公司 | Method for hot-face grouting of blast furnace carbon brick |
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Application publication date: 20191203 |
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