CN106906329B - A method of control bottom blowing gun for converter is exposed - Google Patents
A method of control bottom blowing gun for converter is exposed Download PDFInfo
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- CN106906329B CN106906329B CN201710219343.0A CN201710219343A CN106906329B CN 106906329 B CN106906329 B CN 106906329B CN 201710219343 A CN201710219343 A CN 201710219343A CN 106906329 B CN106906329 B CN 106906329B
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- Prior art keywords
- bottom blowing
- converter
- gun
- blowing gun
- flow
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- 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
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
-
- 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
- C21C5/36—Processes yielding slags of special composition
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- 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 present invention relates to converter steeling technology field more particularly to a kind of method that control bottom blowing gun for converter is exposed, method includes: during converter tapping, and the bottom blowing flow that control bottom blowing gun carries out bottom blowing to converter is 500~600m3/h；Slag splashing operation is carried out to converter；After slag splashing operation, the bottom blowing flow of bottom blowing gun is down to 150~200m3/h.The present invention during converter tapping by using 500~600m3The outsole wind drift amount of/h, meanwhile, after slag splashing operation, the bottom blowing flow of bottom blowing gun is down to 150~200m3/ h is being bessemerized early period so as to form the mushroom head of low melting point above bottom blowing gun, the low melting point mushroom head above bottom blowing gun can rapid melting, guarantee that bottom blowing gun is exposed, to improve bottom blowing effect, reduce the carbon oxygen product of converter terminal.
Description
Technical field
The present invention relates to converter steeling technology field more particularly to a kind of methods that control bottom blowing gun for converter is exposed.
Background technique
With the application of Technology of Slag Splashingfor Furnace Maintenance, furnace bottom rising becomes universal phenomenon, the furnace bottom of converter during bessemerizing
Rise directly affects bottom blowing effect.In order to safeguard that the type of furnace and bottom blowing effect, the prior art reduce furnace bottom by changing furnace bottom operation
Thickness, during changing furnace bottom, bottom blowing gun upper end is easy to be wrapped up by clinker and mending material, and therefore, bottom blowing effect is poor, will finally lead
Cause the carbon oxygen product of converter terminal excessively high.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State the exposed method of the control bottom blowing gun for converter of problem.
The embodiment of the present invention provides a kind of method that control bottom blowing gun for converter is exposed, which comprises
During the converter tapping, control bottom blowing gun to the converter carry out bottom blowing bottom blowing flow be 500~
600m3/h；
Slag splashing operation is carried out to the converter；
After slag splashing operation, the bottom blowing flow of the bottom blowing gun is down to 150~200m3/h。
Preferably, during carrying out slag splashing operation to the converter, the chemistry of the clinker of the converter is controlled
Ingredient are as follows: magnesia: 8~12%, calcium oxide: 40~60%, silica: 10~15%, Quan Tie: 10~20%.
Preferably, during carrying out slag splashing operation to the converter, the bottom blowing gun is controlled to the converter
Carry out pulsed bottom blowing.
Preferably, the control bottom blowing gun carries out pulsed bottom blowing to the converter, comprising:
Pulsed bottom blowing is carried out to the converter with the first pulse flow and the second pulse flow cycle alternation, wherein institute
Stating the first pulse flow is 150~200m3/ h, second pulse flow are 500~600Nm3/h。
Preferably, during carrying out pulsed bottom blowing to the converter, pulse frequency is 0.01~0.1Hz.
Preferably, the bottom blowing gun is circular seam type bottom blowing gun.
Preferably, the capacity of the converter is 150~250t.
One or more technical solutions in the embodiment of the present invention, have at least the following technical effects or advantages:
The present invention during converter tapping by using 500~600m3The outsole wind drift amount of/h, due to bottom blowing flow
Larger, the furnace bottom above bottom blowing gun will form pyramidal pits centered on bottom blowing gun, so as to blow clinker open, guarantee bottom blowing gun
It is exposed, further, during slag splashing operation, clinker solidification, also, after slag splashing operation, by bottom blowing
The bottom blowing flow of rifle is down to 150~200m3/ h, due to bottom blowing flow-reduction, the clinker of bottom blowing gun neighboring area is by gravity
Low melting point can mutually flow into the pyramidal pits above bottom blowing gun, and high-melting-point is mutually retained in other regions, it is difficult to flow
It is dynamic, the mushroom head of low melting point is finally formed above bottom blowing gun, it is further, low due to being formed in the pit above bottom blowing gun
Fusing point mushroom head is being bessemerized early period, the mushroom head above bottom blowing gun can rapid melting, guarantee bottom blowing gun it is exposed, thus
Improve bottom blowing effect, reduce the carbon oxygen product of converter terminal, and the furnace lining in other regions is since fusing point is higher, in blowing after
Phase high-melting-point furnace lining can just melt, and also achieve the technical effect of protection furnace lining.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, identical component is indicated with identical reference pattern.In the accompanying drawings:
Fig. 1 shows the flow chart of the exposed method of one of embodiment of the present invention control bottom blowing gun for converter.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
The embodiment of the present invention provides a kind of method that control bottom blowing gun for converter is exposed, as shown in Figure 1, which comprises
Step 101: during the converter tapping, control bottom blowing gun carries out the bottom blowing flow of bottom blowing to the converter
For 500~600m3/h。
Step 102: slag splashing operation is carried out to the converter.
Step 103: after slag splashing operation, the bottom blowing flow of the bottom blowing gun is down to 150~
200m3/h。
The application during converter tapping by using 500~600m3The outsole wind drift amount of/h, due to bottom blowing flow
Larger, the furnace bottom above bottom blowing gun will form pyramidal pits centered on bottom blowing gun, blow clinker open to realize, guarantee bottom blowing gun
It is exposed, further, during slag splashing operation, clinker solidification, also, after slag splashing operation, by bottom blowing
The bottom blowing flow of rifle is down to 150~200m3/ h, due to bottom blowing flow-reduction, the clinker of bottom blowing gun neighboring area is due to gravity work
In the pyramidal pits for the top that bottom blowing gun mutually can be flowed into low melting point, and high-melting-point is mutually retained in other regions, difficult
With flowing, low-melting mushroom head is finally formed above bottom blowing gun, further, due to being formed in the pit above bottom blowing gun
Have low melting point mushroom head, bessemerizing early period, the mushroom head above bottom blowing gun can rapid melting, guarantee bottom blowing gun it is exposed,
And the furnace lining in other regions can just be melted since fusing point is higher in blowing middle and later periods high-melting-point furnace lining, also achieve protection furnace lining
Technical effect.
In a kind of preferred embodiment of the application, during carrying out slag splashing operation to converter, control turns
The chemical component of the clinker of furnace are as follows: magnesia (MgO): 8~12%, calcium oxide (CaO): 40~60%, silica (SiO2):
10~15%, Quan Tie (TFe): 10~20%, rest part can be phosphorus pentoxide (P2O5) or manganese oxide (MnO), thus,
High-melting-point in clinker is mutually mainly 2CaOSiO2、3CaO·SiO2, low melting point is mainly mutually FeO, in the process of slag splashing
In, oxygen rifle is blown into the cooling effect of nitrogen, and dystectic clinker starts to solidify, after slag splashing operation, due to bottom blowing
Flow-reduction, for the clinker of bottom blowing gun neighboring area due to gravity, the low melting point based on FeO can mutually flow into bottom blowing
In pyramidal pits above rifle, and high-melting-point is mutually retained in other regions, to ensure to be formed above bottom blowing gun compared with low melting point
Mushroom head.
In a kind of preferred embodiment of the application, during carrying out slag splashing operation to converter, bottom is controlled
It blows rifle and pulsed bottom blowing is carried out to converter, wherein can be with the first pulse flow and the second pulse flow cycle alternation to converter
Pulsed bottom blowing is carried out, the first pulse flow is 150~200m3/ h, the second pulse flow are 500~600Nm3/ h, pulse frequency
For 0.01~0.1Hz, the application is operated using pulsed bottom blowing, by high and low two kinds of air pulses alternately bottom blowing, is conducive to
Blow the clinker being covered on bottom blowing gun open.
In the specific implementation process, the quantity that the bottom blowing gun in converter is arranged in can be to be multiple, and bottom blowing gun can be ring
Seam bottom blowing gun, the capacity of converter can be 150~250t.
The specific embodiment of two exposed methods of control bottom blowing gun for converter in practical applications is given below.
In the first embodiment, converter capacity 250t, the quantity of bottom blowing gun are 6, firstly, in converter tapping and slag
During, the bottom blowing flow for controlling each bottom blowing gun is 500m3/ h after slag, shakes positive converter, splashes to converter
Slag furnace retaining operation, during slag splashing operation, the flow for controlling bottom blowing gun is pulse operation, with the first pulse flow
For 200m3/ h and the second pulse flow 600Nm3/ h cycle alternation to converter carry out pulsed bottom blowing, pulse frequency 0.1Hz, together
When, control slag composition is MgO:12%, CaO:60%, SiO2: 15%, TFe:18%, other ingredients are P2O5 and MnO, when
After slag splashing, cancels pulsed bottom blowing, the flow of bottom blowing gun is adjusted to 200m3/ h, finally, the furnace life of converter is
7000 furnaces, and realize that full furnace labour bottom blowing gun is exposed.
In a second embodiment, converter capacity 150t, the quantity of bottom blowing gun are 3, firstly, in converter tapping and slag
During, the bottom blowing flow for controlling each bottom blowing gun is 500m3/ h after slag, shakes positive converter, splashes to converter
Slag furnace retaining operation, during slag splashing operation, the flow for controlling bottom blowing gun is pulse operation, with the first pulse flow
For 150m3/ h and the second pulse flow 500Nm3/ h cycle alternation to converter carry out pulsed bottom blowing, pulse frequency 0.01Hz,
Meanwhile controlling slag composition is MgO:8%, CaO:45%, SiO2: 12%, TFe:13%, other ingredients are P2O5 and MnO, when
After slag splashing, cancels pulsed bottom blowing, the flow of bottom blowing gun is adjusted to 150m3/ h, finally, the furnace life of converter is
6500 furnaces, and realize that full furnace labour bottom blowing gun is exposed.
Technical solution in above-mentioned the embodiment of the present application, at least have the following technical effects or advantages:
The present invention during converter tapping by using 500~600m3The outsole wind drift amount of/h, due to bottom blowing flow
Larger, the furnace bottom above bottom blowing gun will form pyramidal pits centered on bottom blowing gun, so as to blow clinker open, guarantee bottom blowing gun
It is exposed, further, during slag splashing operation, clinker solidification, also, after slag splashing operation, by bottom blowing
The bottom blowing flow of rifle is down to 150~200m3/ h, due to bottom blowing flow-reduction, the clinker of bottom blowing gun neighboring area is by gravity
Low melting point can mutually flow into the pyramidal pits above bottom blowing gun, and high-melting-point is mutually retained in other regions, it is difficult to flow
It is dynamic, the mushroom head of low melting point is finally formed above bottom blowing gun, it is further, low due to being formed in the pit above bottom blowing gun
Fusing point mushroom head is being bessemerized early period, the mushroom head above bottom blowing gun can rapid melting, guarantee bottom blowing gun it is exposed, thus
Improve bottom blowing effect, reduce the carbon oxygen product of converter terminal, and the furnace lining in other regions is since fusing point is higher, in blowing after
Phase high-melting-point furnace lining can just melt, and also achieve the technical effect of protection furnace lining.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (4)
1. a kind of method that control bottom blowing gun for converter is exposed, which is characterized in that the described method includes:
During the converter tapping, the bottom blowing flow that control bottom blowing gun carries out bottom blowing to the converter is 500~600m3/
h；
Slag splashing operation is carried out to the converter；
After slag splashing operation, the bottom blowing flow of the bottom blowing gun is down to 150~200m3/h；
Wherein, it during carrying out slag splashing operation to the converter, controls the bottom blowing gun and arteries and veins is carried out to the converter
Rush formula bottom blowing；
Wherein, the control bottom blowing gun carries out pulsed bottom blowing to the converter, comprising:
Pulsed bottom blowing is carried out to the converter with the first pulse flow and the second pulse flow cycle alternation, wherein described the
One pulse flow is 150~200m3/ h, second pulse flow are 500~600Nm3/h；
Wherein, during carrying out pulsed bottom blowing to the converter, pulse frequency is 0.01~0.1Hz.
2. the method as described in claim 1, which is characterized in that during carrying out slag splashing operation to the converter,
Control the chemical component of the clinker of the converter are as follows: magnesia: 8~12%, calcium oxide: 40~60%, silica: 10~
15%, Quan Tie: 10~20%.
3. the method as described in claim 1, which is characterized in that the bottom blowing gun is circular seam type bottom blowing gun.
4. the method as described in claim 1, which is characterized in that the capacity of the converter is 150~250t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219343.0A CN106906329B (en) | 2017-04-06 | 2017-04-06 | A method of control bottom blowing gun for converter is exposed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219343.0A CN106906329B (en) | 2017-04-06 | 2017-04-06 | A method of control bottom blowing gun for converter is exposed |
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| Publication Number | Publication Date |
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| CN106906329A CN106906329A (en) | 2017-06-30 |
| CN106906329B true CN106906329B (en) | 2019-03-29 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108148942B (en) * | 2017-11-23 | 2019-08-06 | 华北理工大学 | A kind of converter slag stays slag gasification dephosphorization method and recycles smelting process |
| CN110343800B (en) * | 2019-07-03 | 2021-08-20 | 邯郸钢铁集团有限责任公司 | Converter bottom blowing process for bottom blowing brick grouping blowing control |
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| CN101338350A (en) * | 2008-08-07 | 2009-01-07 | 武汉钢铁(集团)公司 | Element protection process by bottom-blowing gas supply |
| CN101487070A (en) * | 2009-02-23 | 2009-07-22 | 钢铁研究总院 | Method for improving combined blown converter campaign length by metal furnace cinder composite mushroom |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Applicant after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Applicant before: Capital Iron & Steel General Company |
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