CN108588312A - A method of processing blast furnace spray gun slagging - Google Patents
A method of processing blast furnace spray gun slagging Download PDFInfo
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- CN108588312A CN108588312A CN201810365915.0A CN201810365915A CN108588312A CN 108588312 A CN108588312 A CN 108588312A CN 201810365915 A CN201810365915 A CN 201810365915A CN 108588312 A CN108588312 A CN 108588312A
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- spray gun
- slagging
- blast furnace
- injection
- coal
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses a kind of methods of processing blast furnace spray gun slagging, belong to pulverized coal injection operating technology field.The present invention, using injection, mechanical oscillation, stopping spray gun cooling wind, rotation a series of measures is stopped, destroying the condition that slagging occurs, realizes online processing spray gun slagging by occurring the analysis of slag-bonding mechanism repeatedly to spray gun after spray gun coal powder injection slagging.Solve the problems, such as that other spray guns injection loads increase after single branch spray gun cannot be blown；Solve the problem of after spray gun slagging that coal bias current flow washes away air port and grinds away air port；It solves since cannot to be blown the bottom house air flow method brought unreasonable for branched rifle, ultimately causes blast furnace slide rule, collapses the problem of malignant activities such as material；Solve the problems, such as that branched rifle cannot be blown and must damping down replacement spray gun.
Description
Technical field
The present invention relates to a kind of methods of processing blast furnace spray gun slagging, belong to technical field of blast furnace coal.
Background technology
During blast furnace is normally smelted, need that coal dust is sprayed into cupola well by spray gun, but spray during injection
Rifle front end often will appear slagging situation, and this phenomenon is just called spray gun slagging.
The appearance of blast furnace spray gun slagging phenomenon has seriously affected the normal coal powder injection of blast furnace.1. there is the branch spray gun after this phenomenon
It needs to stop being blown, the injection load of other spray guns will be increased in this way.2. if spray gun slagging finds later, branch spray gun spray
The coal stream gone out will bias current, wash away air port（One equipment at blast furnace crucibe position）, cause air port to be worn, if air port（Wind
Lead to high pressure water in mouthful to cool down the equipment）Leak then needs damping down（One of blast furnace operation, will be passed through the wind of blast furnace by
A kind of operation gradually stopped, and with all systems of blast furnace cooperation it is required for carrying out that corresponding one operated is complicated makees
Industry）It replaces.3. branched spray gun stop-spraying can influence the lower stream of airflow distribution of blast furnace, cause blast furnace slide rule, collapse the malignant activities such as material,
Seriously affect blast fumance.
The conventional treatment method of blast furnace slagging phenomenon is：It was found that after slagging, stops the branch spray gun coal powder injection, utilize stove after stop-spraying
Interior high fever melts spray gun front end slagging object, but effect unobvious, occurs the thawing of slagging object once in a while, when being blown again
When, spray gun still this phenomenon can occur if it is branched rifle in addition repeatedly in interior slagging in short-term, and blast furnace will be forced
Damping down replaces spray gun.In this way, the yield and quality of blast furnace, cost can be seriously affected.
Invention content
The present invention is intended to provide a kind of method of processing blast furnace spray gun slagging, solves blast furnace spray gun slagging phenomenon online,
To extend the injection service life of single branch rifle, a series of its influence caused by blast furnace is avoided.
The present invention basic principle be：It is shaken spray gun front end using the high heat condition of itself in blast furnace crucibe and external force
The fusing of slagging object, vibrations fall off, and spray gun front end is melted neatly, the condition of slagging is destroyed, and restore spray gun to reach not damping down
The purpose of function.
The present invention provides a kind of methods of processing blast furnace spray gun slagging, by being tied repeatedly to spray gun after coal powder injection slagging
The analysis of slag mechanism destroys the item that slagging occurs using the measure for stopping injection, mechanical oscillation, stopping spray gun cooling wind, rotation
Part realizes online processing spray gun slagging.
The method of processing blast furnace spray gun slagging provided by the invention, specifically includes following steps：
（1）It was found that after spray gun slagging, stop the coal powder injection of the spray gun, prevents the coal stream of coal powder injection from washing away air port of grinding away.Due to stopped
The branch rifle coal injection, there is following variation：First, reduce and the coal gas volume that coal dust firing generates is sprayed by the spray gun；Second,
It stopped and spray into coal dust to branch spray gun front end heat absorption（Normal condition spray gun head temperature at 2050 DEG C ~ 2350 DEG C, and spray into
Coal dust temperature is at 100 DEG C or so）；Third stopped hydrocarbon gasification in coal dust and decompose heat absorption.In summary 3 points of originals
Cause can play the role of promoting spray gun head temperature after stopping injection.
（2）Spray gun is promoted into 20 ~ 30mm to promote spray gun head temperature into stove, and external force is imposed to spray gun and is shaken
It is dynamic, in the case of high temperature and vibrations, the fusing of slagging object, the vibrations of spray gun front end are fallen off；
The application external force be by using pipe wrench, spanner to spray gun carry out tap make spray gun generate vibrations.
（3）Stop the cooling wind of the spray gun, promotes spray gun head temperature again（Spray gun cooling wind is at 15 DEG C or so, spray gun
Head temperature is at 2050 DEG C ~ 2350 DEG C, so spray gun head temperature can be improved by stopping spray gun cooling wind）, will by high fever in stove
Spray gun melts, timing rotation, spray gun front end is melted neatly, and avoid spray gun and deform at high temperature.
（4）After slagging object in spray gun front end falls off, the fusing of spray gun front end is neat, which is restored to be blown.
The spray gun is double pipe structure, and divulge information in outer tube cools down spray gun, inner tube for conveying, injection coal
Powder.
The concrete operations of timing rotation are：Spray gun is rotated by 90 ° every 3 minutes, the time to rotate a circle is 12 minutes, is surpassed
Crossing 12 minutes spray guns can deform.
It is generally acknowledged that spray gun can deform at high temperature after stopping spray gun cooling wind, therefore cooling wind cannot stop；The present invention from
Purpose is set out, devise it is a kind of spray gun front end melted to neat mode, therefore realized by stopping cooling wind and promoted again
The purpose of spray gun head temperature.
Beneficial effects of the present invention：
1. solving the problems, such as that other spray guns injection loads increase after single branch spray gun cannot be blown；
2. solving after spray gun slagging, coal bias current flow washes away air port, grind away air port the problem of；
3. solve since cannot to be blown the bottom house air flow method brought unreasonable for branched rifle, ultimately cause blast furnace slide rule,
The problem of collapsing the malignant activities such as material；
4. solving the problems, such as that branched rifle cannot be blown and must damping down replacement spray gun.
Specific implementation mode
It is further illustrated the present invention below by embodiment, but is not limited to following embodiment.
Embodiment：
A kind of processing method of blast furnace spray gun slagging is present embodiments provided, it is cold using stopping injection, mechanical oscillation, stopping spray gun
But wind, rotation measure, destroy slagging occur condition, realize online processing spray gun slagging.
Specific implementation process is as follows：
（1）Taiyuan Iron and Steel Co. 3# blast furnace spray guns work finds the spray gun slagging of the air ports 17# in customary inspection, and the coal stream sprayed deviates air port
Center line has the possibility for washing away air port, the operation that technical staff takes to be：It was found that after spray gun slagging, contact coal powder injection work stops should
The coal powder injection of spray gun prevents the coal stream of coal powder injection from washing away air port of grinding away.
Due to stopped the branch rifle coal injection, there is following variation：First, reduce and coal dust firing production is sprayed by the spray gun
Raw coal gas volume；Second, it stopped and spray into coal dust to branch spray gun front end heat absorption（Normal condition spray gun head temperature is 2050
DEG C ~ 2350 DEG C, and the coal dust temperature sprayed into is at 100 DEG C or so）；Third stopped hydrocarbon gasification in coal dust and decompose and inhales
Heat.In summary 3 reasons can play the role of promoting spray gun head temperature after stopping injection.
（2）Spray gun work unclamps spray gun clamp, promotes 20mm to promote spray gun head temperature into stove spray gun, utilizes simultaneously
Pipe wrench continuously taps vibrations spray gun, and about spray gun front end slagging object falls off after five minutes.In the case of high temperature and vibrations, by spray gun
The fusing of slagging object, the vibrations of front end fall off；
（3）Then spray gun union system coal powder injection work stops the cooling wind of the spray gun, promotes spray gun head temperature again（Spray gun cooling wind
At 15 DEG C or so, spray gun head temperature is at 2050 DEG C ~ 2350 DEG C, so spray gun head temperature can be improved by stopping spray gun cooling wind）,
Spray gun is melted by high fever in stove, after 3 minutes, spray gun is rotated by 90 ° using pipe wrench, heats and melts spray gun front end, so
Spray gun has carried out 360 ° of rotation process, rotates a circle 12 minutes used times.
Spray gun front end is melted neatly, and avoids spray gun and deform at high temperature by timing rotation in the step.
（4）After slagging object in spray gun front end falls off, the fusing of spray gun front end is neat, which is restored to be blown.The present embodiment
In, it is 18 minutes total to restore normal coal powder injection from discovery spray gun slagging to spray gun.（It is observed after this time operating, the spray gun is again continuous to be made
Industry 2 months.）
The spray gun is double pipe structure, and divulge information in outer tube cools down spray gun, inner tube for conveying, coal injection.
The concrete operations of timing rotation are：Spray gun is rotated by 90 ° every 3 minutes, the time to rotate a circle is 12 minutes, is surpassed
Crossing 12 minutes spray guns can deform.
Through the invention, it solves blast furnace spray gun slagging phenomenon online, to extend the injection service life of single branch rifle, avoids
A series of its influence caused by blast furnace.
Claims (5)
1. a kind of method of processing blast furnace spray gun slagging, it is characterised in that：By occurring slagging repeatedly to spray gun after coal powder injection slagging
The analysis of mechanism destroys the item that slagging occurs using the measure for stopping injection, mechanical oscillation, stopping spray gun cooling wind, rotation
Part realizes online processing spray gun slagging.
2. the method for processing blast furnace spray gun slagging according to claim 1, it is characterised in that：Include the following steps：
（1）It was found that after spray gun slagging, stop the coal powder injection of the spray gun, prevents the coal stream of coal powder injection from washing away air port of grinding away；After stopping injection
It can play the role of promoting spray gun head temperature；
（2）Spray gun is promoted into 20 ~ 30mm to promote spray gun head temperature into stove, and external force is applied to spray gun and is shaken,
In the case of high temperature and vibrations, the fusing of slagging object, the vibrations of spray gun front end are fallen off；
（3）Stop the cooling wind of the spray gun, promotes spray gun head temperature again；Spray gun is melted by high fever in stove, timing is revolved
Turn, spray gun front end is melted neat；
（4）After slagging object in spray gun front end falls off, the fusing of spray gun front end is neat, which is restored to be blown.
3. the method for processing blast furnace spray gun slagging according to claim 2, it is characterised in that：The spray gun is two-tube knot
Structure is divulged information in outer tube and is cooled down to spray gun, and inner tube is used for conveying, coal injection.
4. the method for processing blast furnace spray gun slagging according to claim 2, it is characterised in that：The concrete operations of timing rotation
For：Spray gun is rotated by 90 ° every 3 minutes, the time to rotate a circle is 12 minutes.
5. the method for processing blast furnace spray gun slagging according to claim 2, it is characterised in that：Step（2）Middle application external force
Be by using pipe wrench, spanner to spray gun carry out tap make spray gun generate vibrations.
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| CN201810365915.0A CN108588312B (en) | 2018-04-23 | 2018-04-23 | A method of processing blast furnace spray gun slagging |
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| CN201810365915.0A CN108588312B (en) | 2018-04-23 | 2018-04-23 | A method of processing blast furnace spray gun slagging |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363930A (en) * | 2020-04-15 | 2020-07-03 | 云南锡业股份有限公司铜业分公司 | Method for quickly melting furnace accretion of top-blown furnace |
| CN116875751A (en) * | 2023-09-08 | 2023-10-13 | 稷山县铭福钢铁制品有限公司 | Device for reducing coke ratio of blast furnace and operation method thereof |
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2018
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Patent Citations (7)
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| JPS55100275A (en) * | 1979-01-19 | 1980-07-31 | Kawasaki Steel Co | Mud gun mozzle |
| JPS59143005A (en) * | 1983-02-07 | 1984-08-16 | Sumitomo Metal Ind Ltd | Method for preventing deposition of molten iron and molten slag |
| CN101003845A (en) * | 2006-12-28 | 2007-07-25 | 鞍钢股份有限公司 | Maintenance and clinker removal method of sub lance for converter dual blown from top and bottom, and equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363930A (en) * | 2020-04-15 | 2020-07-03 | 云南锡业股份有限公司铜业分公司 | Method for quickly melting furnace accretion of top-blown furnace |
| CN116875751A (en) * | 2023-09-08 | 2023-10-13 | 稷山县铭福钢铁制品有限公司 | Device for reducing coke ratio of blast furnace and operation method thereof |
| CN116875751B (en) * | 2023-09-08 | 2023-11-14 | 稷山县铭福钢铁制品有限公司 | Device for reducing coke ratio of blast furnace and operation method thereof |
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| CN108588312B (en) | 2019-11-26 |
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