CN105969944B - RH vacuum chamber deep molten bath bottom slot structure - Google Patents
RH vacuum chamber deep molten bath bottom slot structure Download PDFInfo
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- CN105969944B CN105969944B CN201610554738.1A CN201610554738A CN105969944B CN 105969944 B CN105969944 B CN 105969944B CN 201610554738 A CN201610554738 A CN 201610554738A CN 105969944 B CN105969944 B CN 105969944B
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- molten bath
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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
- C21C7/10—Handling in a vacuum
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Abstract
A kind of RH vacuum chamber deep molten bath bottom slot structure provided by the invention, belong to technical field of ferrous metallurgy, including bottom slot shell, the resistance to material of base channel and dip pipe, circulation molten steel when vacuum refining is in the molten bath that the instantaneous molten steel entered in RH vacuum chamber is in that the resistance to material of the base channel is formed, bottom slot shell is successively welded by multistage heat-resisting steel sheet and plate, multistage heat-resisting steel sheet and plate is divided into integral (type) flange from top to bottom, whole pin, slot bottom shell and barrel shell, molten bath is space made of resistance to material is built in the bottom slot shell, equipped with circulation molten steel access way, respectively rising passway and decline passway.The present invention increases the indoor instantaneous molten steel amount retained of vacuum under conditions of main structure size constancy, the molten steel circular flow of holding equipment for vacuum refining are constant；The present invention is also to improve top gun oxygen blast flow to create conditions, and extends circulation molten steel in the RH vacuum chamber residence time, shortens vacuum refining process cycle, improve the efficiency of equipment for vacuum refining.
Description
Technical field
It is specifically deep for a kind of RH vacuum chamber the present invention relates to the vacuum degasser for being used for external refining in metallurgy industry
Molten bath bottom slot structure.
Background technique
RH refining has the metallurgical function such as vacuum outgas, oxygen decarburization, powder injection desulphurization, temperature-compensating, uniform temperature and ingredient
Can, it is large-scale production one of ultra-clean steel and the important equipment of ultra-low-carbon steel, vacuum chamber system is to realize vacuum metallurgy reaction
Core equipment.
Existing RH equipment for vacuum refining is pursued and efficiently, is quickly handled, and main means are to increase the recycle stream of molten steel
Amount.But with the increase of processing capacity, the raising of circular flow is to blowing gas flow, blowing mouth depth and vacuum chamber vacuum
The dependence of degree accordingly weakens, and increasing dipping bore becomes the effective ways for improving molten steel circular flow.But due to by
The limitation of steel ladle inner edge, the RH processing unit of especially medium and small tonnage, in the hair for using application number 201310074271.7
After bright patent " the integral type dip pipe of the RH equipment for vacuum refining " technology, the internal diameter of dip pipe is without can increase.According to
By increasing after molten steel circular flow reaches capacity in the method for promoting RH efficiency, continues to improve RH vacuum refining efficiency needs and seek
Other methods.
Component metallurgical theory is pointed out: RH is a kind of dress that whole molten steel components are recycled into vacuum chamber progress Metallurgical processing
It sets, the molten steel for being instantaneously in vacuum chamber is the sub-fraction of whole molten steel.Within certain time, under vacuum state
Time is longer, and the gas of escape is more.
In addition, the oxygen stream being blown into order to prevent burns out the resistance to material in vacuum chamber bottom, causes to generate when RH uses oxygen decarburization
Accident, therefore it is deep come the hole for limiting supersonic airstream blowout to limit oxygen blast flow.Existing RH vacuum chamber bottom is generally flat
Bottom, due to the limitation of cell bottom structure, when carrying out liquid steel refining processing, the depth capacity of molten steel is only capable of reaching 300~450mm, no
Oxygen blast flow can be further increased, further increasing for RH refining treatment efficiency is limited.
Summary of the invention
In view of this, being recycled the purpose of the present invention is to provide a kind of RH vacuum chamber deep molten bath bottom slot structure in molten steel
In the case that flow can not continue growing, increase molten steel capacity and molten steel depth in vacuum chamber, improves RH equipment for vacuum refining
Efficiency.
In order to achieve the above objectives, the present invention is achieved through the following technical solutions:
A kind of RH vacuum chamber deep molten bath bottom slot structure provided by the invention, including the resistance to material of bottom slot shell, base channel and
Dip pipe, circulation molten steel when vacuum refining be in the resistance to material formation of the base channel in the instantaneous molten steel entered in RH vacuum chamber
In molten bath, it is characterised in that: the bottom slot shell is successively welded by multistage heat-resisting steel sheet and plate, the multistage heat-resisting steel sheet and plate from
Under to integral (type) flange, whole pin, slot bottom shell and barrel shell is above divided into, the molten bath is that resistance to material is built in the bottom slot shell
Space made of building is equipped with circulation molten steel access way, respectively rising passway and decline passway.
Further, circulation molten steel when vacuum refining enters the molten bath from rising passway, and leaves institute from decline passway
The instantaneous molten steel depth stating molten bath, and residing in the molten bath is more than 400mm, up to 600mm.
Further, the liner of the dip pipe is welded on the integral (type) flange, the tedge of the dip pipe and decline
Pipe is aligned with the rising passway in the molten bath and decline passway is connected to respectively.
Further, the barrel shell is cylindrical or cone, and the slot bottom shell is flat, cone bottom or circular arc bottom.
Further, deep molten bath bottom slot structure respectively constitutes monoblock type by integral type or split type dip pipe or divides
The bottom of body formula RH vacuum chamber.
Compared with the prior art, the advantages of the present invention are as follows: RH vacuum chamber deep molten bath bottom of the present invention slot structure is being kept
Under conditions of main structure size constancy, the molten steel circular flow of equipment for vacuum refining are constant, RH vacuum indoor wink is increased
When molten steel amount retained, and achieve following effect:
1) it creates conditions to improve top gun oxygen blast flow；
2) instantaneous molten steel is extended in the RH vacuum chamber residence time；
3) vacuum refining process cycle is shortened；
4) it reduces and promotes the splash height that gas generates；
5) absolute altitude for reducing RH vacuum chamber reduces the investment of SECONDARY REFINING IN A VACUUM CHAMBER；
6) increase molten steel circular flow, improve the efficiency of equipment for vacuum refining；
7) it reduces and promotes throughput, effectively reduce the operating cost of equipment for vacuum refining.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and
It obtains.
Detailed description of the invention
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
The detailed description of one step, in which:
Fig. 1 is the cut-away section structural schematic diagram of RH vacuum chamber deep molten bath base channel of the present invention；
Fig. 2 is the structural schematic diagram of RH vacuum chamber deep molten bath bottom of the present invention slot shell；
Fig. 3 is the bottom substance schematic diagram for the monoblock type RH vacuum chamber that the present invention is welded with integral type dip pipe；
Fig. 4 is the bottom substance schematic diagram for the split type RH vacuum chamber that the present invention is welded with split type dip pipe；
Fig. 5 is to flow to schematic diagram when present invention circulation molten steel enters RH vacuum chamber deep molten bath base channel；
Appended drawing reference: 1 is bottom slot shell, and 2 be the resistance to material of base channel, and 3 be dip pipe；Wherein, 11 be barrel shell, and 12 be slot
Bottom case, 13 be whole pin, and 14 be integral (type) flange, and 21 be molten bath, and 22 be decline passway, and 23 be rising passway, and 31 be liner.
Specific embodiment
Below by a preferred embodiment of the present invention will be described in detail；Preferred embodiment be should be appreciated that only for saying
The bright present invention, rather than limiting the scope of protection of the present invention.
Embodiment one:
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 5, a kind of RH vacuum chamber deep molten bath bottom slot structure provided in this embodiment is main
Be made of bottom slot shell 1, the resistance to material 2 of base channel and dip pipe 3, the bottom slot shell 1 successively welded by multistage heat-resisting steel sheet and plate and
At i.e. multistage heat-resisting steel sheet and plate cyclotomy taper barrel shell 11, arc-shaped slot bottom case 12, whole pin 13, integral (type) flange from top to bottom
Overall structure is formed by welding in 14 4 parts, in this way, the rigidity between whole pin 13 and slot bottom shell 12 can be improved, to reduce thermal change
Shape；Certainly in various embodiments, the barrel shell can also use flat or cone bottom using cylinder, the slot bottom shell,
It equally can achieve above-mentioned purpose；In bottom, the inside of slot shell 1 builds the resistance to material 2 of base channel, so that following when vacuum refining
Ring molten steel is in the molten bath 21 that the instantaneous molten steel entered in RH vacuum chamber is in that the resistance to material 2 of the base channel is formed, i.e., the described molten bath
21 be space made of resistance to material is built in the bottom slot shell 1, and is equipped with circulation molten steel access way, is respectively risen logical
Road 22 and decline passway 23；The dip pipe 3 is an integral structure, to form monoblock type RH vacuum chamber, liner 31 and global approach
Orchid is 14 affixed, and the tedge of integral type dip pipe 3 is aligned with 21 rising passway 23 of molten bath, the down-comer of integral type dip pipe 3 and
The alignment of 21 decline passway 22 of molten bath.Ladle molten steel of the present invention is entered molten by the rising passway 23 of dip pipe 3 and the resistance to material 2 of base channel
Purifying reaction occurs for pond 21, and forms steel by the process that the decline passway 22 of the resistance to material 2 of base channel and dip pipe 3 return to ladle
Liquid recycle stream is dynamic；Meanwhile when the dip pipe 3 insertion ladle molten steel 600mm depth, RH vacuum indoor base channel when vacuum outgas
Instantaneous molten steel depth in molten bath 21 can reach 600mm, and when oxygen decarburization, it can be 400mm.
Specifically, as shown in figure 5, RH internal vacuum chamber forms low pressure, molten steel when RH vacuum chamber is constantly evacuated outward
Enter the base channel of RH vacuum chamber by the tedge nozzle of dip pipe 3 under atmospheric pressure, i.e., dip pipe 3 at this time is upper
Riser is blown into promotion gas and is mixed into molten steel, causes the density of the part molten steel to reduce, to be allowed to continually rise, and true in RH
Drop to ladle again after overflowing gas in the molten bath 21 of the base channel of empty room, to form continuous molten steel circulation, and by pair
Into and reside in molten bath 21 instantaneous molten steel occur metallurgical reaction, with realize degassing, decarburization, mixing ingredient and temperature etc. it is metallurgical
Function.Deep molten bath base channel of the invention, which promotes bubble in vacuum outgas and leaves, rises the distance that nozzle floats to molten steel surface
RH than the prior art increases 200~250mm, and the kinetic energy of bubble is attenuated to relatively large extent, thus in RH vacuum chamber molten steel splashing
Height reduces, and the height of RH vacuum chamber is minimized.Deep molten bath base channel of the invention is in vacuum-oxygen decarbonizing, molten steel surface
Depth from the resistance to material of slot bottom increases 150~200mm, and the depth that oxygen blows hole allows to increase, so that the maximum oxygen blast stream of top gun
Amount is increased, and decarburizing reaction speed is accelerated.By taking 120tRH as an example, the maximum of deep molten bath base channel of the invention is deposited steel amount ratio and is adopted
The molten steel that about 20% is increased with the RH vacuum chamber of the prior art, in the identical situation of molten steel circular flow, component molten steel exists
Residence time is extended in vacuum environment, and the efficiency of vacuum reaction is improved, finally, using deep molten bath bottom of the invention
The metallurgical efficiency of the equipment for vacuum refining of portion's slot is improved.
The present embodiment it is indoor can to increase RH vacuum under conditions of the size of main body of holding equipment for vacuum refining is constant
Steel amount is deposited in molten bath, increases the depth of molten steel, and achieves following effect:
1) compared with prior art, top gun oxygen blast flow significantly improves the present embodiment RH vacuum chamber deep molten bath base channel；
2) compared with prior art, natural decarburization and pressure decarburization efficiency mention the present embodiment RH vacuum chamber deep molten bath base channel
It is high；
3) compared with prior art, the vacuum dehydrogenation time shortens the present embodiment RH vacuum chamber deep molten bath base channel；
4) compared with prior art, vacuum refining efficiency improves the present embodiment RH vacuum chamber deep molten bath base channel；
6) compared with prior art, the operating cost of vacuum processing reduces the present embodiment RH vacuum chamber deep molten bath base channel；
7) compared with prior art, the investment cost of vacuum plant reduces the present embodiment RH vacuum chamber deep molten bath base channel.
Embodiment two:
As shown in figure 4, the present embodiment and embodiment one the difference is that: the dip pipe 3 is split type structure, to be formed
Split type RH vacuum chamber is made up of the bottom of split type RH vacuum chamber split type dip pipe 3, the split type dip pipe 3
Rise dipping pipe orifice to be aligned with the rising passway 23 of the resistance to material 2 of base channel, liner 31 and integral (type) flange 14 are affixed, decline dipping
Pipe orifice is aligned with the decline passway 22 of the resistance to material 2 of base channel, in the welding of liner 31 and integral (type) flange 14.The split type RH vacuum chamber
Using effect it is identical as the using effect of monoblock type RH vacuum chamber.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Scope of the claims in.
Claims (5)
1. a kind of RH vacuum chamber deep molten bath bottom slot structure, including the resistance to material of bottom slot shell, base channel and dip pipe, vacuum refining
When circulation molten steel in the molten bath that the instantaneous molten steel entered in RH vacuum chamber be in the base channel resistance to material formation, feature exists
In: the bottom slot shell is successively welded by multistage heat-resisting steel sheet and plate, and the multistage heat-resisting steel sheet and plate is divided into entirety from top to bottom
Flange, whole pin, slot bottom shell and barrel shell, the molten bath are space made of resistance to material is built in the bottom slot shell,
Equipped with circulation molten steel access way, respectively rising passway and decline passway.
2. RH vacuum chamber deep molten bath bottom according to claim 1 slot structure, it is characterised in that: circulation when vacuum refining
Molten steel enters the molten bath from rising passway, and leaves the molten bath from decline passway, and reside in instantaneous in the molten bath
Molten steel depth is 400mm~600mm.
3. RH vacuum chamber deep molten bath bottom according to claim 1 slot structure, it is characterised in that: the liner of the dip pipe
Be welded on the integral (type) flange, the tedge and down-comer of the dip pipe respectively with the rising passway in the molten bath and decline
Channel alignment connection.
4. RH vacuum chamber deep molten bath bottom according to claim 1 slot structure, it is characterised in that: the barrel shell is cylinder
Shape or cone, the slot bottom shell are flat, cone bottom or circular arc bottom.
5. RH vacuum chamber deep molten bath bottom according to claim 1 slot structure, it is characterised in that: the deep molten bath base channel
Structure respectively constitutes the bottom of monoblock type or split type RH vacuum chamber by integral type or split type dip pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610554738.1A CN105969944B (en) | 2016-07-14 | 2016-07-14 | RH vacuum chamber deep molten bath bottom slot structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610554738.1A CN105969944B (en) | 2016-07-14 | 2016-07-14 | RH vacuum chamber deep molten bath bottom slot structure |
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| Publication Number | Publication Date |
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| CN105969944A CN105969944A (en) | 2016-09-28 |
| CN105969944B true CN105969944B (en) | 2019-01-15 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205741092U (en) * | 2016-07-14 | 2016-11-30 | 中冶赛迪工程技术股份有限公司 | RH vacuum chamber deep molten bath base channel structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05295418A (en) * | 1992-04-22 | 1993-11-09 | Shinagawa Refract Co Ltd | Circulating flow tube in rh vacuum degassing apparatus |
| JPH07316632A (en) * | 1994-05-25 | 1995-12-05 | Shinagawa Refract Co Ltd | Structure of vessel bottom of lower vessel in rh vacuum degassing equipment |
| CN203096117U (en) * | 2013-03-08 | 2013-07-31 | 中冶赛迪工程技术股份有限公司 | Integrated dipping tube of RH vacuum refining device |
| CN103834766B (en) * | 2014-03-12 | 2015-10-14 | 东北大学 | The soaking tub that RH equipment for vacuum refining is used |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205741092U (en) * | 2016-07-14 | 2016-11-30 | 中冶赛迪工程技术股份有限公司 | RH vacuum chamber deep molten bath base channel structure |
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