CN110484684A - A kind of molten steel pocket deslagging method - Google Patents
A kind of molten steel pocket deslagging method Download PDFInfo
- Publication number
- CN110484684A CN110484684A CN201910868118.9A CN201910868118A CN110484684A CN 110484684 A CN110484684 A CN 110484684A CN 201910868118 A CN201910868118 A CN 201910868118A CN 110484684 A CN110484684 A CN 110484684A
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- supervisor
- ladle
- scum
- branch pipe
- packet
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A kind of molten steel pocket deslagging method provided in an embodiment of the present invention, which comprises will be in ladle and the scum on the rear packet edge of the ladle removes using mucking machine；The stretching of slag rifle is blown in control；The described first branch pipe being responsible for is opened, and is blown by the branch pipe on first supervisor to the rear packet edge of the ladle, makes the scum in the ladle far from the rear packet edge；The branch pipe on second supervisor is opened, and is blown by the branch pipe on second supervisor to the direction Bao Zui of the ladle, remaining scum in the ladle is rushed at the packet mouth；It will be removed by the scum rushed at the packet mouth using the mucking machine.The present invention solves the problems, such as that the resistance to material loss of current Slag Tool is high, skims that not clean to cause subsequent smelting to return sulfur content big and unsafe.
Description
Technical field
The present invention relates to steelmaking technical fields, in particular to a kind of molten steel pocket deslagging method.
Background technique
Molten iron pretreatment is that the important measures that converter producing realizes efficient, high-quality, low consumption, low cost, especially molten iron are de-
Sulphur, because desulfurizing iron is that cost is minimum in blast furnace desulfurization, converter desulfurization, the numerous sulfur removal technologies of refining desulfuration, efficiency is highest
A kind of technique, therefore, steel plant generally take Desulphuring Process of Molten Iron, and different steel plant use different sulfur removal technologies, mainly have
KR (KambaraReactor, KR mechanical mixing method) paddling process and blowing process.
As product up-gradation and production cost pressure are continuously increased, many steel plant grind in development desulfurization blowing slag-removing technique
Study carefully and applies.Mainstream blowing slag-removing are as follows: iron packet bottom blowing brick, which blows slag, the side-blown brick of iron packet blows slag, blows slag rifle blows slag.But at present these three
Technique, which exists, catches up with the resistance to material loss of slag tool high and unsafe problem.
Summary of the invention
In view of this, the embodiment of the present invention is designed to provide a kind of molten steel pocket deslagging method, solves and skim at present
Tool resistance to material loss is high, skims and does not lead completely, and subsequent smelting returns that sulfur content is big and unsafe problem.
The application is provided the following technical solutions by an embodiment:
A kind of molten steel pocket deslagging method, comprising:
It will be in ladle and the scum on the rear packet edge of the ladle removes using mucking machine；Control is blown slag rifle and is stretched
Out, the slag rifle that blows includes gun body, and the gun body is located at the top of the ladle, and the gun body is connected with the first supervisor and
Two supervisors, first supervisor and second supervisor are relative to the equal lateral arrangement of the ladle, first supervisor and institute
It states and is provided with branch pipe on the second supervisor；The branch pipe on first supervisor is opened, and passes through the branch pipe on first supervisor
It blows to the rear packet edge of the ladle, makes the scum in the ladle far from the rear packet edge；Open second supervisor
On branch pipe, and by it is described second supervisor on branch pipe to the direction Bao Zui of the ladle blow, by the ladle
Interior remaining scum rushes at the packet mouth；It will be removed by the scum rushed at the packet mouth using the mucking machine.
Preferably, the branch pipe on first supervisor is flat, and the rear packet to the ladle is wrapped along blowing
It includes:
Pass through the rear packet of flat branch pipe to the ladle on first supervisor air-flow flat along blowout.
Preferably, blown described in the opening slag rifle second supervisor on branch pipe before, further includes:
It is removed using the mucking machine to by the scum on the rear packet edge of blowing off.
Preferably, there are three above branch pipes for the setting on second supervisor, described to open on second supervisor
Branch pipe, and blown by the branch pipe on second supervisor to the direction Bao Zui of the ladle, it will be remained in the ladle
Remaining scum rushes at the packet mouth, comprising:
It is blown by outermost two branch pipes on second supervisor, the blowing direction of described two branch pipes is and institute
The middle section shape for stating the second supervisor is in an acute angle；To at the packet mouth during branch pipe on second supervisor is blown
The gun body is swung, the scum in the ladle is converged into Bao Zuichu.
Preferably, the angle of the acute angle is 70 ° -80 °.
Preferably, the swing angle of the gun body is -7.5 °~7.5 ° relative to vertical direction.
Preferably, the air flow rate of first supervisor is 20~70Nm3/h；The air flow rate of second supervisor is 60
~200Nm3/h。
Preferably, described will be in the ladle and the scum on the rear packet edge of the ladle is taken off using mucking machine
Except when remove the time are as follows: 2~3 minutes.
It is preferably, described to be removed by the scum rushed at the packet mouth using the mucking machine, comprising:
When molten iron steel grade when skimming is common steel grade, the scum at the packet mouth is removed using the mucking machine, directly
It is more than or equal to 80% to bright face；When molten iron steel grade when skimming is low-sulphur steel, the scum at packet mouth is removed using mucking machine
Until bright face is more than or equal to 90%；When molten iron steel grade when skimming is ultra-low sulphur steel kind, removed at packet mouth using mucking machine
Scum is until bright face is more than or equal to 97%；Wherein, bright face is the exposed surface ratio of molten iron.
Preferably, the blown work pressure of the branch pipe on first supervisor and the branch pipe on second supervisor is 0.4-
0.6Mpa。
The technical solution provided in the embodiment of the present application, has at least the following technical effects or advantages:
A kind of molten steel pocket deslagging method provided by the invention, most of scum is removed by mucking machine first, then, is used
The branch pipe of first supervisor separates rear wrap along the scum realized to packet along part of blowing with packet edge, convenient for preferably taking off
Slag.Finally, using second supervisor on branch pipe blow by scum rush to Bao Zuichu carry out concentrate remove.By blow slag rifle first
The branch pipe of supervisor and second supervisor branch pipe blow cooperate, ensure that it is significantly more efficient to scum remove, after avoiding wrap edge iron
Slag attachment finally carries out concentrating again taking off iron dross removing and effectively raising the efficiency skimmed in Bao Zuichu, stage by stage to scum
Effect of skimming can effectively be improved by remove, and reduced subsequent smelting and returned sulfur content, and blowing slag rifle in the whole process will not be straight
It connects and is contacted with molten iron, the service life for blowing slag rifle can be improved, reduce cost and improve safety of skimming.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of flow chart for molten steel pocket deslagging method that present pre-ferred embodiments provide；
Fig. 2 is can be using a kind of operative scenario for blowing slag rifle for molten steel pocket deslagging method that present pre-ferred embodiments provide
Structural schematic diagram；
Fig. 3 is the structural schematic diagram of the second supervisor for blowing slag rifle in present pre-ferred embodiments.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
First embodiment
Fig. 1 is please referred to, provides a kind of molten steel pocket deslagging method, in the present embodiment in order to cooperate this method in the present embodiment
In additionally provide one kind and blow slag rifle.
Referring to figure 2. with Fig. 3, blowing slag rifle 10 includes gun body 11, and gun body 11 is located at the top of ladle 21, specifically, rifle
Body 11 can be vertically arranged relative to ladle 21, and gun body 11 at an angle can be swung, the direction of swing and ladle
21 rotation direction is consistent.Specifically, gun body 11 has support oriented device by desulfurization agitator head platform, gun body 11 is scalable,
Such as: stretching speed 15m/min, tilt angle is consistent when setting angle is substantially skimmed with ladle 21.Gun body 11 is connected with
One supervisor 12 and the second supervisor 14, the first supervisor 12 and the second supervisor 14 are relative to the equal lateral arrangement of ladle 21, the first supervisor
12 and second supervisor 14 on be provided with branch pipe；Air-flow reaches the first supervisor 12 and the second supervisor by shunting by gun body 11
14, finally by the branch pipe blowout being respectively arranged on the first supervisor 12 and the second supervisor 14, the shape of branch pipe can be flat.
Further, in order to enable the effect for implementing 21 slag skimming method of ladle is more preferable, air-flow and air pressure are more easily controlled,
Settable the following size: first supervisor 12 effective internal diameter be 25mm, second supervisor 14 effective internal diameter be 60mm, branch pipe it is total
Quantity is 5.It is provided with a branch pipe on first supervisor 12, is oriented rear packet edge of the ladle 21 far from packet mouth 22.Second is main
It is provided with 4 branch pipes on pipe 14, is oriented 22 direction of packet mouth of ladle 21.
As shown in Figure 1, the molten steel pocket deslagging method in the present embodiment, comprising:
Step S10: will be in ladle and the scum on the rear packet edge of the ladle removes using mucking machine；
Step S20: the stretching of slag rifle is blown in control, and the slag rifle that blows includes gun body, and the gun body is located at the upper of the ladle
Side, the gun body are connected with the first supervisor and the second supervisor, and first supervisor and second supervisor are relative to the molten iron
Equal lateral arrangement is wrapped, is provided with branch pipe on first supervisor and second supervisor；
Step S30: opening the branch pipe on first supervisor, and passes through the branch pipe on first supervisor to the molten iron
The rear packet of packet makes the scum in the ladle far from the rear packet edge along blowing；
Step S40: opening the branch pipe on second supervisor, and passes through the branch pipe on second supervisor to the molten iron
The direction Bao Zui of packet is blown, and remaining scum in the ladle is rushed at the packet mouth；
Step S50: it will be removed by the scum rushed at the packet mouth using the mucking machine.
In step slo, execution the result is that the main scum in ladle 21 is removed, remaining scum is more difficult
With what is removed.It should focus on to remove packet along the scum of part when removing using mucking machine.2~3 points of the time removed
Clock, control throughput are 20~70Nm3/ h can remove 60%~80% scum eventually by step S10.
Since the state of scum is different with the difference of slag ingredient, the more typical slag condition of scum after KR desulfurization
Are as follows: powdery/bulk desulfurization slag, dry slag/spherical desulfurization slag (being difficult to remove), normal condition desulfurization slag.It specifically can be according to scum slag
The control of condition adjustment 12 throughputs of the first supervisor and the control for removing the time.For example, dry slag/spherical desulfurization slag can be appropriate when more
Increase by first supervisor 12 throughput.In addition, controlling and removing the control of time for the first 12 throughputs of supervisor can be according to steel
Kind difference be adjusted, such as sulfur-bearing, lower steel grade, which removes the time, suitably to increase, and throughput can suitably increase；Other first
The control of the throughput of supervisor 12 can also be gradually decreased with the increase for removing the time.
In step S20~S30, by being wrapped backward along blowing, packet can be blown off along upper scum and wrap edge, be convenient for mucking machine
It skims.Further, the branch pipe on the first supervisor 12 can be flat, (such as by the flat branch pipe on the first supervisor 12
Branch pipe 121 shown in Fig. 2) to ladle 21 rear packet along blowing out flat air-flow.The horizontal area of air blowing can be increased, improved
The effect of air blowing.Also multiple branch pipes can be set on the first supervisor 12, packet is along blowing backward, with improvement effect.
It mucking machine can be used after blows off to the branch pipe on the first supervisor 12 in packet that scum blows off and wrap the scum on edge and carry out
Removing or take off to packet mouth 22 nearby avoids scum from coming back to packet edge.The process is generally continuously 1~2 minute.
In step s 40, by second be responsible for 14 on branch pipe open be opening first supervisor 12 upper branch pipe after, can
The scum for wrapping edge after benefit is taken off to packet mouth 22, the influence for avoiding the branch pipe on the second supervisor 14 from blowing.In step s 30, second
The throughput of supervisor 14 can be 60~200Nm3/h.The adjusting of the throughput of second supervisor 14 can refer to the air-flow of the first supervisor 12
Conditional manner is measured, is repeated no more.
Further, there are three above branch pipes, such as 3,4,6 etc. for the setting on the second supervisor 14.To described
It blows to rush to scum near packet mouth 22 in 22 direction of packet mouth of ladle 21, comprising:
Step S41: being blown by outermost two branch pipes on second supervisor 14, the air blowing of described two branch pipes
Direction is in an acute angle with the middle section shape of second supervisor 14.Such as, when which is first angle.Specifically, this
One angle is 70 ° -80 °, preferably 75 °, for example, branch pipe 141, branch pipe 144 in Fig. 3 are to 14 inclination of the second supervisor
(air blowing) forms a sharp angle α, β with the middle section of the second supervisor 14.If the branch pipe quantity on the second supervisor 14 is 4 or more,
Second angle can also be formed with the middle section of the second supervisor 14 in the branch pipe of secondary outer layer, second angle is acute angle and is slightly larger than
First angle, for example, 80 ° -90 °.The medial leg of second supervisor 14 can also be in 90 ° of angles with the second supervisor 14, for example, In
Branch pipe 142, branch pipe 143 and the second supervisor 14 in Fig. 3 are in a right angle.The oblique air blowing of branch pipe for being responsible for 14 outsides by second,
Scum can be converged.
Step S42: gradually to described in swing at the packet mouth during branch pipe on second supervisor 14 is blown
Gun body 11 converges to the scum in the ladle 21 at packet mouth 22.Main scum is molten iron surface scum at this time.Its
In, the swing angle of gun body 11 is ± 7.5 ° relative to vertical direction, and the direction of swing should be with the rotation direction one of ladle 21
It causes.
When focusing on scum near packet mouth 22, step S50 can be performed, scum is subjected to concentration and is removed.Step S40-
The execution time of S50 is 2~3 minutes.It should be noted that step S40 and step S50 can be executed repeatedly, the limit of number is not done
System.
In step s 50, it finally removes effect and should correspond to and meet any standard below:
1, when the molten iron steel grade when skimming is common steel grade, the scum near packet mouth 22 is removed using mucking machine until bright
Face is more than or equal to 80%, and molten iron surface is scum mixture, needs to remove after desulfurization, in order to describe effect of skimming, uses
Evaluation criterion is in the bright face of the molten iron exposed or is scum depeeling rate.Bright face that is, molten iron exposed surface ratio.
2, when the molten iron steel grade when skimming is low-sulphur steel, the scum near packet mouth 22 is removed using mucking machine until bright
Face is more than or equal to 90%；
3, the molten iron steel grade when skimming be ultra-low sulphur steel kind when, using mucking machine remove the scum near packet mouth 22 until
Bright face is more than or equal to 97%.
In embodiments of the present invention, in order to control the gas supply on the first supervisor 12 and the second supervisor 14 respectively, can exist respectively
Gun body 11 branches to the position setting control valve of the first supervisor 12 and the second supervisor 14, and the control of control valve is the prior art, no
It repeats again.In addition, the blown work pressure of the branch pipe on the first supervisor 12 and the branch pipe on the second supervisor 14 is 0.4-0.6Mpa,
Slag effect is blown in guarantee, avoids blow gas pressure is excessive from causing danger.
In embodiments of the present invention, it should also periodically check to blowing slag rifle 10, such as: it is serious or disconnected for scaling loss
It splits, blocks up rifle, no flow；Junction gas leakage can not be handled；Resistance to material falls off exposed steel pipe, be easy to cause equipment to deform, can not carry out
The failures such as slag operation are blown, are required to replace to blowing slag rifle 10.
In a specific example, original process common variety is averaged slag-removing time 6.9min, low-sulphur steel slag-removing time
8.0min, ultra-low sulphur steel kind slag-removing time 9.2min are respectively 5.1min, 5.7min and 6.9min after optimization)；Low-sulfur steel steel grade
Sulfur content is returned in converter reduces by 0.0012%；Sulfur content is returned in ultra-low sulphur steel kind converter reduces by 0.0009%, excellent using the present embodiment method
After change, slag-removing time, converter are returned sulfur content and are significantly reduced, and preferable level is reached, and mention for the progress of steel industry smelting converter environment
Direction is supplied.
A kind of molten steel pocket deslagging method provided by the invention, most of scum is removed by mucking machine first, then, is used
The branch pipe of first supervisor separates rear wrap along the scum realized to packet along part of blowing with packet edge, convenient for preferably taking off
Slag.Finally, using second supervisor on branch pipe blow by scum rush to Bao Zuichu carry out concentrate remove.By blow slag rifle first
The branch pipe of supervisor and second supervisor branch pipe blow cooperate, ensure that it is significantly more efficient to scum remove, after avoiding wrap edge iron
Slag attachment, removing to scum stage by stage can effectively improve quality of skimming, and finally carry out concentration in Bao Zuichu and remove iron
Slag effectively raises the efficiency skimmed, and blows slag rifle in the whole process and will not directly contact with molten iron, can be improved and blows slag
The service life of rifle reduces cost and improves safety of skimming.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of molten steel pocket deslagging method characterized by comprising
It will be in ladle and the scum on the rear packet edge of the ladle removes using mucking machine；
The stretching of slag rifle is blown in control, and the slag rifle that blows includes gun body, and the gun body is located at the top of the ladle, and the gun body connects
It is connected to the first supervisor and the second supervisor, first supervisor and described second are responsible for relative to the equal lateral arrangement of the ladle,
Branch pipe is provided on first supervisor and second supervisor；
The branch pipe on first supervisor is opened, and is blown by the branch pipe on first supervisor to the rear packet edge of the ladle
Gas makes the scum in the ladle far from the rear packet edge；
The branch pipe on second supervisor is opened, and the branch pipe being responsible for by described second is to the direction Bao Zui of the ladle
It blows, remaining scum in the ladle is rushed at the packet mouth；
It will be removed by the scum rushed at the packet mouth using the mucking machine.
2. the method according to claim 1, wherein it is described first supervisor on branch pipe be it is flat, it is described to
The rear packet of the ladle is along air blowing, comprising:
Pass through the rear packet of flat branch pipe to the ladle on first supervisor air-flow flat along blowout.
3. the method according to claim 1, wherein blowing the branch pipe on the second supervisor of slag rifle described in the opening
Before, further includes:
It is removed using the mucking machine to by the scum on the rear packet edge of blowing off.
4. the method according to claim 1, wherein there are three above branch for the setting on second supervisor
Pipe, it is described open it is described second supervisor on branch pipe, and by it is described second be responsible on packet mouth from branch pipe to the ladle
Direction is blown, and remaining scum in the ladle is rushed at the packet mouth, comprising:
It is blown by outermost two branch pipes on second supervisor, the blowing direction of described two branch pipes is with described the
The middle section shape of two supervisors is in an acute angle；
Gradually to the swing gun body at the packet mouth during branch pipe on second supervisor is blown, by the iron
Scum in water packet converges to Bao Zuichu.
5. according to the method described in claim 4, it is characterized in that, the angle of the acute angle is 70 ° -80 °.
6. according to the method described in claim 4, it is characterized in that, the swing angle of the gun body relative to vertical direction be-
7.5 °~7.5 °.
7. the method according to claim 1, wherein the air flow rate of first supervisor is 20~70Nm3/h；
The air flow rate of second supervisor is 60~200Nm3/h。
8. the method according to claim 1, wherein described will be in the ladle and described using mucking machine
The time is removed when the scum on the rear packet edge of ladle is removed are as follows: 2~3 minutes.
9. the method according to claim 1, wherein described will be rushed at the packet mouth using the mucking machine
Scum removed, comprising:
When molten iron steel grade when skimming is common steel grade, the scum at the packet mouth is removed using the mucking machine, until bright
Face is more than or equal to 80%；
When molten iron steel grade when skimming is low-sulphur steel, the scum at packet mouth is removed using mucking machine until bright face is more than or equal to
90%；
When molten iron steel grade when skimming is ultra-low sulphur steel kind, the scum at packet mouth is removed using mucking machine until bright face is greater than etc.
In 97%；
Wherein, bright face is the exposed surface ratio of molten iron.
10. -9 any method according to claim 1, which is characterized in that branch pipe on first supervisor and described the
The blown work pressure of branch pipe on two supervisors is 0.4-0.6Mpa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669722A (en) * | 2022-05-27 | 2022-06-28 | 东北大学 | Slag avoiding method for improving purity of casting blank |
| CN115198056A (en) * | 2022-06-21 | 2022-10-18 | 首钢集团有限公司 | Blowing device and KR efficient slag skimming method |
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| CN203360480U (en) * | 2013-07-26 | 2013-12-25 | 武汉钢铁(集团)公司 | Spray gun used for assisting slagging-off by blowing air at top during molten iron pretreatment |
| CN104328238A (en) * | 2014-10-15 | 2015-02-04 | 首钢总公司 | Converter smelting resulfurization amount control method |
| CN104831013A (en) * | 2015-05-28 | 2015-08-12 | 中冶赛迪工程技术股份有限公司 | Slag blow-removal mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669722A (en) * | 2022-05-27 | 2022-06-28 | 东北大学 | Slag avoiding method for improving purity of casting blank |
| CN115198056A (en) * | 2022-06-21 | 2022-10-18 | 首钢集团有限公司 | Blowing device and KR efficient slag skimming method |
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