CN114058779A - Method for quickly washing converter - Google Patents
Method for quickly washing converter Download PDFInfo
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- CN114058779A CN114058779A CN202111382865.5A CN202111382865A CN114058779A CN 114058779 A CN114058779 A CN 114058779A CN 202111382865 A CN202111382865 A CN 202111382865A CN 114058779 A CN114058779 A CN 114058779A
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- washing
- oxygen
- oxygen lance
- converter
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- 238000005406 washing Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 46
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 120
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 120
- 239000001301 oxygen Substances 0.000 claims abstract description 120
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 238000011010 flushing procedure Methods 0.000 claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims description 30
- 239000002893 slag Substances 0.000 claims description 26
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 20
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 20
- 239000011449 brick Substances 0.000 claims description 20
- 239000004571 lime Substances 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 10
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 10
- 239000010436 fluorite Substances 0.000 claims description 10
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 239000011572 manganese Substances 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000001427 coherent effect Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- 238000010276 construction Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 4
- 235000012245 magnesium oxide Nutrition 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 241000271510 Agkistrodon contortrix Species 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4693—Skull removal; Cleaning of the converter mouth
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
- C21C5/441—Equipment used for making or repairing linings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides a method for quickly washing a converter, which relates to the technical field of converter washing and comprises the following steps: flushing a furnace cap, controlling time, flushing a molten pool, controlling a gun position, lifting a gun for cooling, flushing a furnace bottom and cooling and maintaining; the invention reasonably matches the side-blown oxygen lance and the 5-hole oxygen lance in the furnace washing process to ensure that the on-line control is that the side-blown oxygen lance and the 5-hole oxygen lance are respectively one, a furnace washing scheme is formulated for different positions in the converter, 16 copper holes of the side-blown oxygen lance are in an annular structure, so that the oxygen jet area has wider action surface and stronger pertinence, and the fast furnace washing effect is achieved.
Description
Technical Field
The invention relates to the technical field of converter washing, in particular to a method for quickly washing a converter.
Background
When the converter steelmaking is carried out, because the alkalinity of the slag is higher, the MgO content in the slag reaches or exceeds a saturation value, the temperature of a hearth is reduced after the converter is turned over and the steel is tapped, part of high-melting-point substances (MgO, C2S and C3S) are separated out, the viscosity of the slag is increased, most of the slag is remained at the bottom of the converter except part of the slag which is linked on a furnace wall and a furnace lining during slag splashing and is combined with magnesia carbon brick periclase crystals at the bottom of the converter, so that the bottom of the converter is expanded, the reaction space in the converter is reduced after the bottom of the converter is expanded, the dephosphorization effect is poor, meanwhile, splashing is easy to cause, the steel-making cost is increased, and meanwhile, the safety risk is brought, and the smooth production of the converter is influenced, therefore, the converter needs to be cleaned;
the traditional method for cleaning the converter before service of the converter is to clean the slag splashing layer of the furnace cap, the molten pool and the furnace bottom by using a common online oxygen lance, and the online oxygen lance has a triangular oxygen jet flow path and a large slag accumulation amount of the furnace cap, so that the common oxygen lance has more times for cleaning the furnace cap and long cleaning time, the furnace cap cannot be cleaned rapidly, and the cost and the time are wasted.
Disclosure of Invention
Aiming at the problems, the invention provides a method for quickly washing a converter, which realizes the reasonable matching of a side-blown oxygen lance and a 5-hole oxygen lance according to the condition of slag adhering in the converter during washing the converter, sets reasonable oxygen supply flow, oxygen lance height and oxygen supply time according to the washing effect, and achieves the effect of quickly washing the converter, thereby saving the time for washing the converter in service and improving the efficiency for washing the converter.
In order to realize the purpose of the invention, the invention is realized by the following technical scheme: a method for quickly washing a converter comprises the following steps:
the method comprises the following steps: flushing stove cap
Using a side-blown oxygen lance, manually opening the oxygen lance to 14.5m below the side-blown oxygen lance, controlling the height of the oxygen lance to be 13m-14.5m after slag is removed, moving the lance up and down, washing the position of a furnace cap, and washing the furnace cap to be thin until no obvious slag is accumulated;
step two: controlling time
Controlling the time for washing the furnace cap each time within 1.5min, and then gradually reducing the washing time according to the condition of the last furnace;
step three: flushing molten pool
After the furnace washing cap meets the requirements, the converter is shaken to the zero position, a side-blown oxygen lance and a 5-hole oxygen lance are respectively used, the lance position of the oxygen lance is lowered, oxygen is manually turned on, and the position of a molten pool is washed;
step four: controlling gun position
In the process of washing the molten pool, controlling the gun position range, and stringing guns up and down according to the slag-forming condition until the molten pool is washed to be thin to generate brick joints;
step five: gun lifting cooling
The cleaning time is gradually reduced according to the condition of the last furnace in each time of furnace cleaning, and lime is added into the furnace for cooling after the gun is lifted each time of furnace cleaning;
step six: flushing furnace bottom
Using a side-blown oxygen lance and a 5-hole oxygen lance respectively, reducing the height of the oxygen lances, adopting a manual oxygen opening mode, reducing the height of the oxygen lances again after slag removal, controlling the lance position range in the process, stringing the lances up and down back and forth, and flushing the bottom of the converter until the thickness of the lance is reduced to the current brickwork joint;
step seven: cooling and curing
And gradually reducing the cleaning time according to the condition of the last furnace during each time of cleaning the bottom of the furnace, adding lime into the furnace after the gun is lifted after each time of cleaning, cooling, pouring out the lime after cooling, and adding a carbon ramming mass into the bottom of the furnace for maintenance.
The further improvement lies in that: in the first step, the oxygen supply flow is controlled at 6000-7000m3And in the step one, when the gun is moved up and down, each position is controlled to stay for 3-5 s.
The further improvement lies in that: in the second step, the subsequent furnace washing cap time is gradually reduced within 1-1.5min according to the previous furnace condition, so that the phenomenon that the slag dumping control is influenced by the cavity is prevented.
The further improvement lies in that: in the third step, the oxygen lance position is lowered to 3m encoder height, oxygen is opened manually, wherein the side-blown oxygen lance and the 5-hole oxygen lance are opened synchronously, and the flow is controlled to 24000m3H, the oxygen blowing intensity is controlled to be 3-4m3/t*min。
The further improvement lies in that: in the fourth step, in the process of washing the molten pool, the gun position range is controlled to be 1.5m-3m of the height of the encoder, and in the fourth step, the concrete specification of the brick joints is as follows: the gap is continuous without interruption, and the bath washing is stopped.
The further improvement lies in that: in the fifth step, the time is controlled to be gradually reduced within 1-3min, and in the fifth step, lime is added into the furnace for 1.5-2.0t after the gun is washed.
The further improvement lies in that: and in the fifth step, after cooling, pouring out lime, pouring manganese ore and fluorite into the furnace, covering the bottom of the furnace, heating the furnace body again to ensure that accretions are separated from the furnace, pouring out the manganese ore, the fluorite and the accretions, and cooling to room temperature.
The further improvement lies in that: in the sixth step, the oxygen lance is lowered to the height of the 1.5m encoder, and the flow rate is controlled to 20000-3H, the oxygen blowing intensity is controlled to be 4-5m3/t*min。
The further improvement lies in that: in the sixth step, the oxygen lance is lowered to the height of the encoder of 1m after slag is removed, the lance position range is controlled to be 0.5m-1m of the encoder height in the process, and in the sixth step, the specification of the brick joints is that the joints are coherent without interruption, and the furnace bottom washing is stopped.
The further improvement lies in that: and in the seventh step, the time is controlled to be gradually reduced within 1.5-3.5min, and lime is added into the furnace for 1-1.5t after the extraction gun is washed each time.
The invention has the beneficial effects that:
1. according to the invention, the side-blown oxygen lance and the 5-hole oxygen lance are reasonably matched in the process of washing the converter, the on-line control of one side-blown oxygen lance and one 5-hole oxygen lance is ensured, the scheme of washing the converter is formulated at different positions in the converter, and 16 copper holes on the copper head of the side-blown oxygen lance are in an annular structure, so that the oxygen jet area has a wider action surface and stronger pertinence, and the effect of quickly washing the converter is achieved.
2. The invention sets the oxygen supply flow of the side-blown oxygen lance, sets the height of the oxygen lance position according to the furnace condition of the converter, sets the control time of the process of washing the furnace, avoids the condition of cavities, damages and the like in the furnace from influencing slag pouring operation, uses the 5-hole oxygen lance to treat the molten pool and the furnace bottom after the furnace cap position is washed, has wider washing area of the furnace bottom and the molten pool and higher efficiency, solves the problem of single means in the process of washing the furnace, reduces the loss time in the process of washing the furnace, and improves the working efficiency.
3. According to the invention, the manganese ore and the fluorite are poured and heated before the bottom of the furnace is washed, so that the melting temperature of the furnace accretion can be reduced, the accretion is separated from the furnace wall, and the cleaning effect is optimized.
4. The invention adds carbon ramming mass to the bottom of the furnace for maintenance after cleaning and cooling the bottom of the furnace, is mainly used below the carbon bricks of the bottom of the furnace and in the gaps between the carbon bricks of the hearth and the cooling wall, has the characteristics of high heat conductivity, no harmful gas escape in normal-temperature construction, better construction labor conditions and the like, has the functions of ramming, heat conduction and the like, and has very important effects on the safety and long service life of the hearth and the bottom of the converter.
Drawings
Fig. 1 is a front view of the present invention.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Example one
According to the illustration in fig. 1, the embodiment proposes a method for rapid washing of a converter, which comprises the following steps:
the method comprises the following steps: flushing stove cap
Using a side-blown oxygen lance, manually opening oxygen when the oxygen lance is lowered to 14.5m, and controlling the oxygen supply flow at 6000m3Controlling the height of the oxygen lance to be 13-14.5 m after slagging, moving the oxygen lance up and down, controlling each position to stay for 3s, washing the position of a furnace cap, and washing the furnace cap to be thin until no obvious slag deposition exists;
step two: controlling time
Controlling the time for washing the furnace cap within 1.5min each time, and then gradually reducing the washing time within 1-1.5min according to the previous furnace condition to prevent the occurrence of cavities from influencing slag dumping control;
step three: flushing molten pool
After the furnace washing cap meets the requirements, the converter is shaken to the zero position, a side-blown oxygen lance and a 5-hole oxygen lance are respectively used, the oxygen lance position is lowered to the height of a 3m encoder, oxygen is manually opened, wherein the side-blown oxygen lance and the 5-hole oxygen lance are synchronously opened, and the flow is controlled to 24000m3H, the oxygen blowing intensity is controlled to be 3-4m3T min, flushing the position of the molten pool;
step four: controlling gun position
In the process of washing the molten pool, the gun position range is controlled to be 1.5m-3m in height of an encoder, guns are connected back and forth according to the slag-forming condition until the molten pool is washed to be thin until brick joints appear, and the specific specification is as follows: the gap is continuous without interruption, and the bath washing is stopped;
step five: gun lifting cooling
Controlling the cleaning time to be gradually reduced within 1-3min according to the condition of the last furnace in each time of furnace cleaning, adding 1.5t of lime into the furnace after the gun is lifted in each time of furnace cleaning for cooling, pouring out the lime after the cooling is finished, pouring manganese ore and fluorite into the furnace, covering the bottom of the furnace, heating the furnace body again to separate accretions from the furnace, pouring out the manganese ore, the fluorite and the accretions, and cooling to room temperature;
step six: flushing furnace bottom
Using side-blown oxygen lances and 5-hole oxygen lances respectively, lowering the oxygen lances to the height of a 1.5m encoder, and controlling the flow rate to 20000m by adopting a manual oxygen starting mode3H, the oxygen blowing intensity is controlled to be 4-5m3T min, reducing the height of the oxygen lance again after slag is removed, reducing the height of the oxygen lance to 1m of the height of an encoder, controlling the lance position range to be 0.5m-1m of the height of the encoder in the process, stringing the lance up and down back and forth, and washing the position of the bottom of the furnace until the thickness of the brick joint is reduced to the current brick joint, wherein the specification is that the joint is coherent without interruption, and the bottom of the furnace is stopped to be washed;
step seven: cooling and curing
And controlling the cleaning time to gradually decrease within 1.5-3.5min according to the last furnace condition during each time of cleaning the bottom of the furnace, adding 1.5t of lime into the furnace after cleaning the gun, cooling, pouring out the lime after cooling, and adding a carbon ramming mass into the bottom of the furnace for maintenance. The material is mainly used for gaps below the carbon bricks at the bottom of the converter and between the carbon bricks in the hearth and a cooling wall, has the characteristics of high heat conductivity, no harmful gas escape in normal-temperature construction, better construction labor conditions and the like, has the functions of tamping, heat conduction and the like, and has very important effects on the safety and long service life of the hearth and the bottom of the converter.
Example two
According to the illustration in fig. 1, the embodiment proposes a method for rapid washing of a converter, which comprises the following steps:
the method comprises the following steps: flushing stove cap
Using a side-blown oxygen lance, manually starting oxygen when the oxygen lance is lowered to 14.5m, and controlling the oxygen supply flow at 7000m3Controlling the height of the oxygen lance to be 13-14.5 m after slagging, moving the oxygen lance up and down, controlling each position to stay for 5s, washing the position of a furnace cap, and washing the furnace cap to be thin until no obvious slag deposition exists;
step two: controlling time
Controlling the time for washing the furnace cap within 1.5min each time, and then gradually reducing the washing time within 1-1.5min according to the previous furnace condition to prevent the occurrence of cavities from influencing slag dumping control;
step three: flushing molten pool
After the furnace washing cap meets the requirements, the converter is shaken to the zero position, a side-blown oxygen lance and a 5-hole oxygen lance are respectively used, the oxygen lance position is lowered to the height of a 3m encoder, oxygen is manually opened, wherein the side-blown oxygen lance and the 5-hole oxygen lance are synchronously opened, and the flow is controlled to 24000m3H, the oxygen blowing intensity is controlled to be 3-4m3T min, flushing the position of the molten pool;
step four: controlling gun position
In the process of washing the molten pool, the gun position range is controlled to be 1.5m-3m in height of an encoder, guns are connected back and forth according to the slag-forming condition until the molten pool is washed to be thin until brick joints appear, and the specific specification is as follows: the gap is continuous without interruption, and the bath washing is stopped;
step five: gun lifting cooling
Controlling the cleaning time to be gradually reduced within 1-3min according to the condition of the last furnace in each time of furnace cleaning, adding lime into the furnace for 2.0t after the gun is lifted in each time of furnace cleaning for cooling, pouring out the lime after the cooling is finished, pouring manganese ore and fluorite into the furnace, covering the bottom of the furnace, heating the furnace body again to separate accretions from the furnace, pouring out the manganese ore, the fluorite and the accretions, and cooling to room temperature;
step six: flushing furnace bottom
Using a side-blown oxygen lance and a 5-hole oxygen lance respectively, lowering the oxygen lances to the height of a 1.5m encoder, and controlling the flow rate to 24000m by adopting a manual oxygen opening mode3H, the oxygen blowing intensity is controlled to be 4-5m3T min, reducing the height of the oxygen lance again after slagging, reducing the height of the oxygen lance to 1m of the height of the encoder, and controlling the lance position range in the processMaking the position of the furnace bottom at the height of a 0.5-1 m encoder, stringing guns up and down back and forth, and washing the furnace bottom until the brick joints are washed thin and the specification is that the joints are continuous without interruption, and stopping washing the furnace bottom;
step seven: cooling and curing
And controlling the cleaning time to gradually decrease within 1.5-3.5min according to the last furnace condition during each time of cleaning the bottom of the furnace, adding 1.5t of lime into the furnace after cleaning the gun, cooling, pouring out the lime after cooling, and adding a carbon ramming mass into the bottom of the furnace for maintenance. The material is mainly used for gaps below the carbon bricks at the bottom of the converter and between the carbon bricks in the hearth and a cooling wall, has the characteristics of high heat conductivity, no harmful gas escape in normal-temperature construction, better construction labor conditions and the like, has the functions of tamping, heat conduction and the like, and has very important effects on the safety and long service life of the hearth and the bottom of the converter.
According to the first embodiment and the second embodiment, the oxygen supply flow is controlled to be 6000-7000m3And/h, when the lance is moved up and down, each position is controlled to stay for 3-5s, so that the furnace cap is washed, and the effect is better.
According to the method for rapidly washing the converter, the side-blown oxygen lance and the 5-hole oxygen lance are reasonably matched in the process of washing the converter, the fact that the side-blown oxygen lance and the 5-hole oxygen lance are respectively controlled to be one on line is ensured, a scheme for washing the converter is formulated at different positions in the converter, 16 copper holes on the copper head of the side-blown oxygen lance are in an annular structure, the area of action of oxygen jet flow is wider, the pertinence is stronger, and the effect of rapidly washing the converter is achieved. And the method for quickly washing the converter sets the oxygen supply flow of the side-blown oxygen lance, sets the height of the oxygen lance position according to the condition of the converter, sets the control time of washing the converter in the process, avoids the condition of cavities, damages and the like in the converter from influencing slag pouring operation, and uses the 5-hole oxygen lance to treat the molten pool and the furnace bottom after the washing of the furnace at the position of the furnace cap is finished, so that the washing area of the furnace bottom and the molten pool is wider, the efficiency is higher, the problem of the singleness of the means in the process of washing the converter is solved, the loss time in the process of washing the converter is reduced, and the working efficiency is improved. Meanwhile, the method for rapidly washing the converter pours the manganese ore and the fluorite into the converter before washing the bottom of the converter and heats the converter, so that the melting temperature of a furnace nodule can be reduced, the furnace nodule is separated from the furnace wall, and the cleaning effect is optimized. In addition, the method for quickly washing the converter is mainly used for curing the carbon ramming material added into the converter bottom after the converter bottom is cleaned and cooled, is mainly used for gaps below the carbon bricks of the converter bottom and between the carbon bricks of the converter hearth and a cooling wall, has the characteristics of high heat conductivity, no harmful gas escape in normal-temperature construction, better construction labor conditions and the like, has the functions of ramming, heat conduction and the like, and has very important effects on the safety and long service life of the converter hearth and the converter bottom.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method for quickly washing a converter is characterized by comprising the following steps:
the method comprises the following steps: flushing stove cap
Using a side-blown oxygen lance, manually opening the oxygen lance to 14.5m below the side-blown oxygen lance, controlling the height of the oxygen lance to be 13m-14.5m after slag is removed, moving the lance up and down, washing the position of a furnace cap, and washing the furnace cap to be thin until no obvious slag is accumulated;
step two: controlling time
Controlling the time for washing the furnace cap each time within 1.5min, and then gradually reducing the washing time according to the condition of the last furnace;
step three: flushing molten pool
After the furnace washing cap meets the requirements, the converter is shaken to the zero position, a side-blown oxygen lance and a 5-hole oxygen lance are respectively used, the lance position of the oxygen lance is lowered, oxygen is manually turned on, and the position of a molten pool is washed;
step four: controlling gun position
In the process of washing the molten pool, controlling the gun position range, and stringing guns up and down according to the slag-forming condition until the molten pool is washed to be thin to generate brick joints;
step five: gun lifting cooling
The cleaning time is gradually reduced according to the condition of the last furnace in each time of furnace cleaning, and lime is added into the furnace for cooling after the gun is lifted each time of furnace cleaning;
step six: flushing furnace bottom
Using a side-blown oxygen lance and a 5-hole oxygen lance respectively, reducing the height of the oxygen lances, adopting a manual oxygen opening mode, reducing the height of the oxygen lances again after slag removal, controlling the lance position range in the process, stringing the lances up and down back and forth, and flushing the bottom of the converter until the thickness of the lance is reduced to the current brickwork joint;
step seven: cooling and curing
And gradually reducing the cleaning time according to the condition of the last furnace during each time of cleaning the bottom of the furnace, adding lime into the furnace after the gun is lifted after each time of cleaning, cooling, pouring out the lime after cooling, and adding a carbon ramming mass into the bottom of the furnace for maintenance.
2. The method for rapidly washing the converter according to claim 1, wherein: in the first step, the oxygen supply flow is controlled at 6000-7000m3And in the step one, when the gun is moved up and down, each position is controlled to stay for 3-5 s.
3. The method for rapidly washing the converter according to claim 1, wherein: in the second step, the subsequent furnace washing cap time is gradually reduced within 1-1.5min according to the previous furnace condition, so that the phenomenon that the slag dumping control is influenced by the cavity is prevented.
4. The method for rapidly washing the converter according to claim 1, wherein: in the third step, the oxygen lance position is lowered to 3m encoder height, oxygen is opened manually, wherein the side-blown oxygen lance and the 5-hole oxygen lance are opened synchronously, and the flow is controlled to 24000m3H, the oxygen blowing intensity is controlled to be 3-4m3/t*min。
5. The method for rapidly washing the converter according to claim 1, wherein: in the fourth step, in the process of washing the molten pool, the gun position range is controlled to be 1.5m-3m of the height of the encoder, and in the fourth step, the concrete specification of the brick joints is as follows: the gap is continuous without interruption, and the bath washing is stopped.
6. The method for rapidly washing the converter according to claim 1, wherein: in the fifth step, the time is controlled to be gradually reduced within 1-3min, and in the fifth step, lime is added into the furnace for 1.5-2.0t after the gun is washed.
7. The method for rapidly washing the converter according to claim 1, wherein: and in the fifth step, after cooling, pouring out lime, pouring manganese ore and fluorite into the furnace, covering the bottom of the furnace, heating the furnace body again to ensure that accretions are separated from the furnace, pouring out the manganese ore, the fluorite and the accretions, and cooling to room temperature.
8. The method for rapidly washing the converter according to claim 1, wherein: in the sixth step, the oxygen lance is lowered to the height of the 1.5m encoder, and the flow rate is controlled to 20000-3H, the oxygen blowing intensity is controlled to be 4-5m3/t*min。
9. The method for rapidly washing the converter according to claim 1, wherein: in the sixth step, the oxygen lance is lowered to the height of the encoder of 1m after slag is removed, the lance position range is controlled to be 0.5m-1m of the encoder height in the process, and in the sixth step, the specification of the brick joints is that the joints are coherent without interruption, and the furnace bottom washing is stopped.
10. The method for rapidly washing the converter according to claim 1, wherein: and in the seventh step, the time is controlled to be gradually reduced within 1.5-3.5min, and lime is added into the furnace for 1-1.5t after the extraction gun is washed each time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111382865.5A CN114058779A (en) | 2021-11-22 | 2021-11-22 | Method for quickly washing converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111382865.5A CN114058779A (en) | 2021-11-22 | 2021-11-22 | Method for quickly washing converter |
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| Publication Number | Publication Date |
|---|---|
| CN114058779A true CN114058779A (en) | 2022-02-18 |
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| CN202111382865.5A Pending CN114058779A (en) | 2021-11-22 | 2021-11-22 | Method for quickly washing converter |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB739674A (en) * | 1954-04-02 | 1955-11-02 | Pintsch Bamag Ag | Improvements in or relating to apparatus for loosening and/or removing slag from a metallurgical converter |
| CN102994687A (en) * | 2012-11-27 | 2013-03-27 | 攀钢集团攀枝花钢钒有限公司 | Method for reducing thickness of converter bottom |
| CN107828933A (en) * | 2017-10-31 | 2018-03-23 | 日照钢铁控股集团有限公司 | The method for controlling convertor lining thickness |
| CN108950126A (en) * | 2018-09-04 | 2018-12-07 | 马鞍山钢铁股份有限公司 | A kind of method of quick reduction converter bottom height |
| CN108977617A (en) * | 2018-09-03 | 2018-12-11 | 南京钢铁股份有限公司 | One kind scrubbing clinker cross-drilled hole oxygen rifle and its brushing method |
| CN110408738A (en) * | 2019-08-30 | 2019-11-05 | 攀钢集团攀枝花钢钒有限公司 | Steelmaking converter furnace bottom method |
-
2021
- 2021-11-22 CN CN202111382865.5A patent/CN114058779A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB739674A (en) * | 1954-04-02 | 1955-11-02 | Pintsch Bamag Ag | Improvements in or relating to apparatus for loosening and/or removing slag from a metallurgical converter |
| CN102994687A (en) * | 2012-11-27 | 2013-03-27 | 攀钢集团攀枝花钢钒有限公司 | Method for reducing thickness of converter bottom |
| CN107828933A (en) * | 2017-10-31 | 2018-03-23 | 日照钢铁控股集团有限公司 | The method for controlling convertor lining thickness |
| CN108977617A (en) * | 2018-09-03 | 2018-12-11 | 南京钢铁股份有限公司 | One kind scrubbing clinker cross-drilled hole oxygen rifle and its brushing method |
| CN108950126A (en) * | 2018-09-04 | 2018-12-07 | 马鞍山钢铁股份有限公司 | A kind of method of quick reduction converter bottom height |
| CN110408738A (en) * | 2019-08-30 | 2019-11-05 | 攀钢集团攀枝花钢钒有限公司 | Steelmaking converter furnace bottom method |
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