CN109811110A - A kind of accurate slag splashing method of converter - Google Patents
A kind of accurate slag splashing method of converter Download PDFInfo
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- CN109811110A CN109811110A CN201910294422.7A CN201910294422A CN109811110A CN 109811110 A CN109811110 A CN 109811110A CN 201910294422 A CN201910294422 A CN 201910294422A CN 109811110 A CN109811110 A CN 109811110A
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Abstract
The invention discloses a kind of accurate slag splashing methods of converter, comprising: checks when tapping converter body, determines each position erosion condition of converter body, and accordingly adjusts the bottom blowing gun flow of corresponding position according to each position erosion condition of furnace body；According to furnace body erosion condition by converter grate to designated position after tapping；Drop rifle carries out splashing slag, slag basis rifle position and flow are splashed according to each position erosion condition determination of furnace body, splashing slag rifle position reduces with attack sites height growth splashing within the scope of the best rifle position of slag, splashes slag flow and increases with attack sites height growth most preferably splashing in slag range of flow；Converter is shaken to charging bit after splashing slag and is charged.This method is splashed thickness of slag layer to each position of furnace body and is precisely controlled, and realizes the scientific and normal control of converter profile, it is ensured that furnace body operational safety.And the accurate control by splashing the quantity of slag, the science control of the type of furnace is realized, and then improve operational stability, reduces the excessive quantity of slag of smelting process, promote each economic indicator, reduce smelting cost.
Description
Technical field
The present invention relates to metallurgical technology fields, more specifically to a kind of accurate slag splashing method of converter.
Background technique
Converter in charging and smelting process, each position of furnace lining due to by steel scrap, molten iron hit degradation degree and clinker and
Molten steel erosive velocity is different, individual sites often occurs and corrodes serious phenomenon, repairs furnace lining at present and mostly uses the mode for splashing slag.
However splash each position of furnace body when slag to splash the quantity of slag almost the same, it splashes slag and finishes each position and splash slag blanket and cannot achieve and be precisely controlled on demand,
When furnace lining individual sites being caused to corrode serious, it is unable to get timely reparation, is forced to be safeguarded using blowing out fettling mode, to life
It produces stability and smelting cost is affected.
Further, since splashing slag blanket can not be precisely controlled, often there are furnace lining individual sites and splash that slag blanket is blocked up to lead to Converter
Type is irregular, is affected to converter smelting.
In conclusion how to efficiently solve using converter splash slag repair furnace lining to splash slag blanket precision low and then to converter smelting
The problems such as refining is affected, is current those skilled in the art's problem to be solved.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of accurate slag splashing method of converter, this method can be solved effectively
Certainly converter splash slag repair furnace lining to splash slag blanket precision low and then the problem of be affected to converter smelting.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of accurate slag splashing method of converter, comprising:
Converter body is checked when tapping, determines each position erosion condition of converter body, and according to each position of furnace body
Erosion condition accordingly adjusts the bottom blowing gun flow of corresponding position；
According to furnace body erosion condition by converter grate to designated position after tapping；
Drop rifle carries out splashing slag, is determined according to each position erosion condition of furnace body and splashes slag basis rifle position and splash slag normal flow, splashed
Slag rifle position splash within the scope of the best rifle position of slag by it is described splash slag basis rifle position on the basis of reduce with attack sites height growth, splash
Slag flow most preferably splash in slag range of flow by it is described splash slag normal flow on the basis of increase with attack sites height growth；
Converter is shaken to charging bit after splashing slag and is charged.
Preferably, in the accurate slag splashing method of above-mentioned converter, it is described according to furnace body erosion condition by converter grate to specific bit
It sets, specifically includes:
If the top of the slag corrodes seriously, converter is shaken to 2-3 ° of the vertical off setting top of the slag, if steel face is corroded seriously, converter is shaken
To 2-3 ° of vertical off setting steel face.
Preferably, described that correspondence is accordingly adjusted according to each position erosion condition of furnace body in the accurate slag splashing method of above-mentioned converter
The bottom blowing gun flow at position, specifically includes:
Each bottom blowing gun flow with bottom blowing gun upper furnace body erosion severity and the rising away from furnace bottom height and increase.
Preferably, in the accurate slag splashing method of above-mentioned converter, each bottom rifle wind drift amount corrodes tight with bottom blowing gun upper furnace body
Weight degree and rising away from furnace bottom height and increase, specifically include:
Each bottom blowing gun flow by it is described splash slag normal flow based on, flow value added is corresponding upper furnace body attack sites
Height value is multiplied by 60Nm3/h。
Preferably, in the accurate slag splashing method of above-mentioned converter, the best rifle position of slag of splashing is 0.4-0.9 times of furnace diameter.
Preferably, in the accurate slag splashing method of above-mentioned converter, bottom blowing optimum flow range is 300-1000Nm3/h。
Using the accurate slag splashing method of converter provided by the invention, on the one hand converter body is checked in tapping, really
Determine each position erosion condition of converter body, the bottom blowing gun stream of corresponding position is accordingly adjusted further according to each position erosion condition of furnace body
Amount.On the other hand, after tapping according to furnace body erosion condition by converter grate to designated position；Drop rifle carries out splashing slag, according to
Each position erosion condition of furnace body, which determines, to be splashed slag basis rifle position and splashes slag normal flow, is splashed slag rifle position and is being splashed within the scope of the best rifle position of slag
It is reduced on the basis of splashing slag basis rifle position with attack sites height growth, splashes slag flow and splash in slag range of flow most preferably to splash
Increase on the basis of slag normal flow with attack sites height growth；Converter is shaken to charging bit after splashing slag and is charged.
To sum up, this method by tapping furnace body inspection determine each position erosion condition of furnace body, and invaded according to each position
Erosion situation optimization bottom blowing gun flow and oxygen rifle splash slag rifle position and flow, and control clinker splashes height, while corroding feelings according to furnace body
The quantity of slag is splashed at condition adjustment each position of converter zero-location control furnace body, is reached each position of furnace body and is splashed thickness of slag layer and is precisely controlled, and realizes converter
The scientific and normal control of the type of furnace, it is ensured that furnace body operational safety.By splashing the accurate control of the quantity of slag, the science for realizing the type of furnace is controlled,
And then operational stability is improved, the excessive quantity of slag of smelting process is reduced, each economic indicator is promoted, reduces smelting cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow diagram of the accurate slag splashing method of converter of a specific embodiment of the invention；
Fig. 2 is that the top of the slag corrodes serious converter grate schematic diagram.
It is marked in Fig. 2 as follows:
The top of the slag 1, vertical off setting top of the slag angle [alpha].
Specific embodiment
The embodiment of the invention discloses a kind of accurate slag splashing method of converter, reaches each position of furnace body and splash thickness of slag layer and precisely control
System realizes the scientific and normal control of converter profile, provides safeguard for stable operation, smelting cost is effectively reduced, it is ensured that furnace body operation
Safety.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the flow diagram of the accurate slag splashing method of converter of a specific embodiment of the invention.
In a specific embodiment, the accurate slag splashing method of converter provided by the invention, comprising the following steps:
S1: checking converter body when tapping, determines each position erosion condition of converter body, and according to each portion of furnace body
Position erosion condition accordingly adjusts the bottom blowing gun flow of corresponding position.
It can specifically be checked in such a way that artificial experience judges or tool measures, to determine each position of converter body
Erosion condition.Erosion severity can specifically be characterized by converter body surface according to the distance of burner hearth center line, and distance is big
Position be to corrode serious position.According to each position erosion condition of furnace body, the bottom blowing gun flow at each position of correspondence is adjusted
It is whole, specifically, each bottom blowing gun flow can be determined according to bottom blowing gun upper furnace body erosion degree with the height away from furnace bottom, it is tight with corroding
Weight degree and height rise and flow increases.The size of specific value added can be accordingly arranged according to the actual situation, not make to have herein
Body limits.
S2: according to furnace body erosion condition by converter grate to designated position after tapping.
Specifically, shake converter to 2-3 ° of the vertical off setting top of the slag if the top of the slag corrodes seriously, if steel face is corroded seriously,
Converter is shaken to 2-3 ° of vertical off setting steel face.The converter top of the slag and steel face are two positions of converter body, and erosive velocity is compared with other portions
Position is fast.Converter is shaken to 2-3 ° of the vertical off setting top of the slag, is shaken converter center line to the deviation top of the slag by vertical line as shown in Fig. 2, referring to
2-3 °, i.e. vertical off setting top of the slag angle [alpha] is 2-3 °.Converter is shaken to 2-3 ° of vertical off setting steel face, then for by converter center line by hanging down
Straight line shakes to deviateing 2-3 ° of steel face, shown in Fig. 2 in be to shake 2-3 ° counterclockwise.
S3: drop rifle carries out splashing slag, is determined according to each position erosion condition of furnace body and splashes slag basis rifle position and splash slag normal flow,
Splashing slag rifle position reduces on the basis of splashing within the scope of the best rifle position of slag to splash slag basis rifle position with attack sites height growth, splashes slag
Flow increases on the basis of most preferably splashing in slag range of flow to splash slag normal flow with attack sites height growth.
Namely during splashing slag, according to each position erosion condition of furnace body, top gun (oxygen rifle) is adjusted accordingly and splashes slag rifle
Position and flow, so that it is almost the same to splash slag rear furnace body lining thickness.It is determining according to tapping temperature and the quantity of slag specifically to splash the slag time.
Splashing slag rifle position reduces on the basis of splashing within the scope of the best rifle position of slag to splash slag basis rifle position with attack sites height growth, then phase
It answers, splashing slag rifle position reduces with attack sites height on the basis of splashing within the scope of the best rifle position of slag to splash slag basis rifle position and increased
It is high；Slag flow is splashed to increase on the basis of most preferably splashing in slag range of flow to splash slag normal flow with attack sites height growth,
Then correspondingly, splash slag flow most preferably splash in slag range of flow to splash slag normal flow on the basis of with attack sites height reduce and
It reduces.
Wherein, splash slag basis rifle position refer to according to lining wear position height determination actually splash slag rifle position absolute altitude, can specifically join
Examine the conventional determination for splashing slag rifle position in the prior art；It splashes slag rifle position and refers to practical rifle position during splashing slag；The best rifle position of slag is splashed to refer to
The good rifle position range of slag effect, range spluttering slag effect are splashed according to what oxygen rifle aditus laryngis, angle, bottom blowing distribution and furnace diameter determined
Poor, specifically splashing the best rifle position of slag can be to splash slag basis rifle position to float up and down 500mm.It splashes the best rifle position of slag and most preferably splashes slag stream
Amount setting value range corresponds to same or similar tonnage converter.
It splashes slag normal flow and refers to that existing oxygen rifle splashes the flow of slag setting；It most preferably splashes slag flow and refers to that oxygen rifle is splashed in slag technique and provide
Flow-control scope, going beyond the scope will lead to that effect is poor, and specific size can be set as needed；It splashes slag flow and refers to that oxygen rifle is splashed
Actual flow during slag.
Specifically splashing slag rifle position and splashing slag flow can be set as needed with the adjustment amount of attack sites height change, herein not
It is specific again to limit.
S4: converter is shaken to charging bit after splashing slag and is charged.
The present invention provides the accurate slag splashing method of converter, splashes slag rifle position and flow by optimization bottom blowing gun flow and oxygen rifle, controls
Clinker processed splashes height, splashes the quantity of slag by adjusting each position of converter zero-location control furnace body, reaches each position of furnace body and splash thickness of slag layer
It is precisely controlled, realizes the scientific and normal control of converter profile, it is ensured that furnace body operational safety.By splashing the accurate control of the quantity of slag, realize
The science control of the type of furnace, and then improve operational stability reduces smelting process and overflows the quantity of slag, promotes each economic indicator, reduce smelting
It is smelt this.
Further, in above-mentioned steps S3, each bottom rifle wind drift amount is with bottom blowing gun upper furnace body erosion severity and away from furnace
The rising of bottom height and increase, specifically include: each bottom blowing gun flow based on bottom blowing normal flow, flow value added be correspond to
Upper furnace body attack sites height value is multiplied by 60Nm3/h.Wherein, the unit of attack sites height value takes m, with flux unit pair
It answers.By setting above-mentioned corresponding relationship for flow value added, slag accordingly accurately can be splashed according to furnace body erosion degree.
Bottom blowing normal flow refers to the flow of existing bottom blowing process setting, is joined according to bottom blowing gun distribution, type and converter process
The setting such as number.
Specifically, the above-mentioned best rifle position of slag of splashing is 0.4-0.9 times of furnace diameter, above-mentioned bottom blowing optimum flow range is
300-1000Nm3/h.Bottom blowing optimum flow refers to flow-control scope specified in bottom-blowing of converter technique, goes beyond the scope and will lead to bottom
It is poor to blow effect, there is also security risks, specifically can be set to 300-1000Nm3/h.Above-mentioned numberical range is preferably to splash
Slag rifle position and slag flow is splashed, according to other actual needs, mutually should can also carry out adaptability tune to splashing slag rifle position and splashing slag flow
It is whole.
Individually below by taking a preferred embodiment as an example, and this programme is maked a comparison description with comparative example.
Embodiment 1
120 tons of accurate slag splashing methods of oxygen top and bottom combined blown converter, including following operating procedure:
1) furnace body is observed when tapping, determines that the converter top of the slag is serious according to lining wear at 5-6 meters of furnace bottom, it is more recessed than normal portions
50mm；
2) the bottom blowing gun flow of vessel slag face position 2 is adjusted to 730Nm3/ h, other bottom blowing gun flows keep normal flow
(400Nm3/h)；
3) tapping finishes, and converter is shaken to 2 ° of the furnace body vertical off setting top of the slag；
4) drop rifle carries out splashing slag, splashes the control of slag basis rifle position away from furnace bottom 2629mm, splashing slag rifle position adjusting range is to splash slag
Basic rifle position ± 500mm, top gun splash slag flow control in 30960Nm3/h；
5) it splashes after slag 4 divides 30 seconds to shake converter to charging bit and charge.
Comparative example 1
120 tons of oxygen top and bottom combined blown converters splash slag operation, comprising the following steps:
1) tapping, which finishes to shake converter to zero-bit, carries out splashing slag；
2) each bottom blowing gun flow keeps normal flow (400Nm3/h)；
3) drop rifle carries out splashing slag, splashes the control of slag basis rifle position away from furnace bottom 2945mm, splashing slag rifle position adjusting range is to splash slag
Basic rifle position ± 500mm, top gun splash slag flow control in 28800Nm3/h；
4) it splashes after slag 4 divides 30 seconds to shake converter to charging bit and charge.
Embodiment 1 is splashed slag effect with comparative example 1 to compare, the results are shown in Table 1.
Table 1 splashes slag Contrast on effect
To sum up, the accurate slag splashing method of converter provided by the invention, by optimization bottom blowing gun flow and oxygen rifle splash slag rifle position and
Flow, control clinker splash height, splash the quantity of slag by adjusting each position of converter zero-location control furnace body, reach each position of furnace body and splash slag
Thickness degree is precisely controlled, and is realized the scientific and normal control of converter profile, is provided safeguard for stable operation, smelting cost is effectively reduced,
Ensure furnace body operational safety.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (6)
1. a kind of accurate slag splashing method of converter characterized by comprising
Converter body is checked when tapping, determines each position erosion condition of converter body, and corrode according to each position of furnace body
Situation accordingly adjusts the bottom blowing gun flow of corresponding position；
According to furnace body erosion condition by converter grate to designated position after tapping；
Drop rifle carries out splashing slag, is determined according to each position erosion condition of furnace body and splashes slag basis rifle position and splash slag normal flow, splashes slag rifle
Position splash within the scope of the best rifle position of slag by it is described splash slag basis rifle position on the basis of reduce with attack sites height growth, splash slag stream
Amount most preferably splash in slag range of flow by it is described splash slag normal flow on the basis of increase with attack sites height growth；
Converter is shaken to charging bit after splashing slag and is charged.
2. the accurate slag splashing method of converter according to claim 1, which is characterized in that described to be turned according to furnace body erosion condition
Furnace grate is specifically included to designated position:
If the top of the slag corrodes seriously, converter is shaken to 2-3 ° of the vertical off setting top of the slag, if steel face is corroded seriously, converter is shaken to vertical
It is straight to deviate 2-3 ° of steel face.
3. the accurate slag splashing method of converter according to claim 1 or 2, which is characterized in that described to be invaded according to each position of furnace body
Erosion situation accordingly adjusts the bottom blowing gun flow of corresponding position, specifically includes:
Each bottom blowing gun flow with bottom blowing gun upper furnace body erosion severity and the rising away from furnace bottom height and increase.
4. the accurate slag splashing method of converter according to claim 3, which is characterized in that each bottom rifle wind drift amount is with bottom blowing gun
Upper furnace body erosion severity and rising away from furnace bottom height and increase, specifically include:
Each bottom blowing gun flow by it is described splash slag normal flow based on, flow value added is corresponding upper furnace body attack sites height
Value is multiplied by 60Nm3/h。
5. the accurate slag splashing method of converter according to claim 1, which is characterized in that the best rifle position of slag of splashing is that burner hearth is straight
0.4-0.9 times of diameter.
6. the accurate slag splashing method of converter according to claim 1, which is characterized in that bottom blowing optimum flow range is 300-
1000Nm3/h。
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| CN201910294422.7A CN109811110A (en) | 2019-04-12 | 2019-04-12 | A kind of accurate slag splashing method of converter |
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| CN201910294422.7A CN109811110A (en) | 2019-04-12 | 2019-04-12 | A kind of accurate slag splashing method of converter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074038A (en) * | 2019-12-27 | 2020-04-28 | 安徽工业大学 | Converter slag splashing protection targeted slag splashing gun position control method |
| CN113249541A (en) * | 2021-04-23 | 2021-08-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Furnace protection method of bottom blowing powder injection converter |
| WO2022001874A1 (en) * | 2020-06-29 | 2022-01-06 | 宝山钢铁股份有限公司 | Slag-splashing fettling method |
| CN115287392A (en) * | 2022-08-10 | 2022-11-04 | 柳州钢铁股份有限公司 | Quick maintenance method for converter slag pouring surface and furnace bottom lining |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000040976A (en) * | 1998-12-21 | 2000-07-15 | 이구택 | Method for coating slag splash of electric furnace |
| CN101280365A (en) * | 2008-05-28 | 2008-10-08 | 北京科技大学 | Slag splashing method for nickel-copper smelting converter |
| CN104789733A (en) * | 2015-03-27 | 2015-07-22 | 山东钢铁股份有限公司 | Maintenance method of converter lining |
| CN105821175A (en) * | 2016-05-27 | 2016-08-03 | 山东钢铁股份有限公司 | Slag-splashing converter protection method for controlling converter profiles |
| CN108517386A (en) * | 2018-04-10 | 2018-09-11 | 唐山新宝泰钢铁有限公司 | Fettling method for steelmaking converter |
-
2019
- 2019-04-12 CN CN201910294422.7A patent/CN109811110A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000040976A (en) * | 1998-12-21 | 2000-07-15 | 이구택 | Method for coating slag splash of electric furnace |
| CN101280365A (en) * | 2008-05-28 | 2008-10-08 | 北京科技大学 | Slag splashing method for nickel-copper smelting converter |
| CN104789733A (en) * | 2015-03-27 | 2015-07-22 | 山东钢铁股份有限公司 | Maintenance method of converter lining |
| CN105821175A (en) * | 2016-05-27 | 2016-08-03 | 山东钢铁股份有限公司 | Slag-splashing converter protection method for controlling converter profiles |
| CN108517386A (en) * | 2018-04-10 | 2018-09-11 | 唐山新宝泰钢铁有限公司 | Fettling method for steelmaking converter |
Non-Patent Citations (4)
| Title |
|---|
| 姜殿良: "120t转炉炉衬维护实践", 《黑龙江冶金》 * |
| 廖永松: "转炉溅渣护炉技术的特点及其应用", 《武钢技术》 * |
| 李升 等: "100t顶底复吹转炉溅渣护炉控制实践", 《黑龙江冶金》 * |
| 苏天森 等: "《转炉溅渣护炉技术》", 31 March 1999, 冶金工业出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074038A (en) * | 2019-12-27 | 2020-04-28 | 安徽工业大学 | Converter slag splashing protection targeted slag splashing gun position control method |
| CN111074038B (en) * | 2019-12-27 | 2022-03-08 | 安徽工业大学 | Converter slag splashing protection targeted slag splashing gun position control method |
| WO2022001874A1 (en) * | 2020-06-29 | 2022-01-06 | 宝山钢铁股份有限公司 | Slag-splashing fettling method |
| CN113930574A (en) * | 2020-06-29 | 2022-01-14 | 宝山钢铁股份有限公司 | Slag splashing fettling method beneficial to furnace bottom maintenance |
| CN113930574B (en) * | 2020-06-29 | 2022-12-16 | 宝山钢铁股份有限公司 | Slag splashing fettling method beneficial to furnace bottom maintenance |
| CN113249541A (en) * | 2021-04-23 | 2021-08-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Furnace protection method of bottom blowing powder injection converter |
| CN115287392A (en) * | 2022-08-10 | 2022-11-04 | 柳州钢铁股份有限公司 | Quick maintenance method for converter slag pouring surface and furnace bottom lining |
| CN115287392B (en) * | 2022-08-10 | 2023-10-27 | 柳州钢铁股份有限公司 | Method for rapidly maintaining converter slag pouring surface and converter bottom lining |
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Application publication date: 20190528 |
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| RJ01 | Rejection of invention patent application after publication |