CN207749161U - The control device and consutrode of reducing atmosphere in esr process - Google Patents
The control device and consutrode of reducing atmosphere in esr process Download PDFInfo
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- CN207749161U CN207749161U CN201721921464.1U CN201721921464U CN207749161U CN 207749161 U CN207749161 U CN 207749161U CN 201721921464 U CN201721921464 U CN 201721921464U CN 207749161 U CN207749161 U CN 207749161U
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Abstract
The utility model is related to a kind of steel esr process technical field, the control device and consutrode of reducing atmosphere in a kind of esr process are disclosed.The control device of reducing atmosphere includes crystallizer, consutrode ontology, deoxidation material and protective gas delivery pipe in the esr process; consutrode ontology is set in crystallizer; protective gas delivery pipe uses self-consuming material, deoxidation material to may be contained on consutrode ontology with protective gas delivery pipe.The fusing synchronous with consutrode ontology of appendix, linear cored deoxidation material may be implemented in it; protective gas and deoxidation material are delivered directly to the top of the slag simultaneously; improve the convection current of gas and the effect of deoxidier in crystallizer; stabilize nitrogen partial pressure; prevent the reduction of nitrogen in steel content; Deoxidation Atmosphere in Furnace preferably is controlled, to protecting the gas contents such as oxidizable melting loss of elements and control hydrogen, oxygen, nitrogen in Electroslag Process to have more obvious effect.
Description
Technical field
The utility model is related to a kind of steel esr process technical fields, especially can be achieved on esr process
The control device and consutrode of reducing atmosphere in the esr process that reducing atmosphere controls in middle crystallizer.
Background technology
With the development of energy industry, to Thermal generation unit, more stringent requirements are proposed, in order to improve the thermal efficiency and tight
The running temperature of the discharge of lattice control carbon dioxide and contaminant particle, boiler and steam turbine has been increased to 620 DEG C, wherein boiler
Before pipeline and steam turbine High inter case are totally different from material requirements, especially High inter case large forgings design makes
With heat-resistance high-strength stainless steel, it is desirable that silicone content is less than 0.10% in steel, and aluminium is less than 0.010%, not titaniferous, while need to control nitrogen
0.015~0.030%, boron is controlled 0.008~0.011%, since oxyphilic element silicon, aluminium, Ti content are quite few in steel,
When melting, the elements such as boron, chromium in steel easily aoxidize, and cause chemical composition unqualified and scrap, so for steel grade requirement
Melting is carried out in non-oxidizing atmosphere, it is not oxidized not only to control the ingredients such as oxyphilic element chromium, silicon, boron in steel, simultaneously
Control hydrogen, oxygen, the nitrogen content in steel.
As shown in Figure 1, in traditional electroslag furnace reducing atmosphere control, be that protective cover 4 is placed on crystallizer 9, still
Not in contact with consutrode ontology 2, while gas blow pipe 11 is mounted on 9 upper port of crystallizer；In fusion process, by upper in crystallizer 9
Slag bath 6, molten bath 7 and steel ingot 8 are followed successively by under.The reducing atmosphere of slag is kept to need to manually add to a small amount of deoxidation material, by
It is acinous or powdery in these materials, deoxidier, in reflow process, traditional reproducibility gas is added from crystallizer upper port
Atmosphere control program has the following problems：
First, outside air does not play good buffer action, and since 6 temperature of slag bath is up to 1700 DEG C or more, slag bath top
Air, the especially air near consutrode ontology 2 largely overflows because of heating, causes the protective gas being blown into and stove
Interior gas will produce strong convection and mixing, the oxygen in the air for entering 6 top of the crystallizer top of the slag can not be set a raft going out, i.e. consumable
Gas near electrode body 2 flows up, and the gas near crystallizer 9 flows downward, therefore because of gaseous exchange and mixing
And the inert protective gas being blown into is made to be difficult to reach the top of the slag 6, gas shield can not be played the role of, reducing atmosphere is difficult to manufacture.
Second is that deoxidation material is added from crystallizer upper port 10, in the dropping process before reaching the top of the slag 6, has part
Deoxidation material is aoxidized by stove high temperature gas scaling loss, can not carry out effective deoxidation to slag, it is difficult to manufacture Deoxidation Atmosphere in Furnace.
It is especially more difficult to large-scale ESR ingot.
Third, having higher nitrogen content in the steel, when being blown into protective gas due to nitrogen partial pressure drop in top of the slag overhead gas
It is low that nitrogen in steel content can be caused to reduce.
It illustrates：
Certain company one 13 tons of ESR ingot of produced in conventional processes, boron content scaling loss, which is up to the elements such as 50%, Si, also to be had
Different scaling loss illustrate that conventional method is difficult to manufacture reducing atmosphere, and the oxidizable element such as B, Si can not be protected from scaling loss.Electroslag
Composition transfer such as table 1 before and after melting.
When 1 conventional method melting of table, composition transfer (%) before and after melting
| Element | Si | Mn | P | S | Cr | B | Al | O/PPm | N/PPm |
| Before melting | 0.10 | 0.40 | 0.006 | 0.002 | 9.24 | 0.015 | 0.010 | 40 | 235 |
| After melting | 0.06 | 0.35 | 0.007 | 0.001 | 9.10 | 0.007 | 0.008 | 55 | 164 |
Utility model content
The technical problem to be solved by the utility model is to provide a kind of controls of reducing atmosphere in esr process
Device and consutrode improve reducing atmosphere in esr process, keep the stability of chemical composition in Electroslag Process, drop
The oxidation of oxyphilic element, prevents nitrogen content from reducing in low steel, improves product qualification rate.
The control device of reducing atmosphere in esr process disclosed by the utility model, including crystallizer, from power consumption
Pole ontology, deoxidation material and protective gas delivery pipe, the consutrode ontology are set in crystallizer, and the protective gas is defeated
Send pipe that self-consuming material, the deoxidation material is used to may be contained on consutrode ontology with protective gas delivery pipe.
Preferably, it is provided with protective cover on the crystallizer, between the protective cover and consutrode ontology and protects
It connects and seals by soft heat-resisting material between cover and crystallizer.
Preferably, the soft heat-resisting material is soft refractory ceramic fibre cloth or alumina-silica fire Nomex.
Preferably, the deoxidation material and protective gas delivery pipe are arranged on consutrode body surface.
Preferably, the deoxidation material uses linear cored deoxidation material.
Preferably, the deoxidation material is at least two, and is uniformly distributed in an axial direction on consutrode ontology.
Preferably, the protective gas delivery pipe is at least two, and is uniformly distributed in consutrode ontology in an axial direction
On.
Preferably, the mouthpiece of the protective gas delivery pipe is downward, and the air blowing flow of each protective gas delivery pipe
It is consistent with pressure, and be distributed centered on consutrode ontology.
Consutrode disclosed by the utility model, including consutrode ontology, deoxidation material and protective gas delivery pipe, institute
Stating protective gas delivery pipe uses self-consuming material, the deoxidation material to may be contained within consutrode sheet with protective gas delivery pipe
On body.
The utility model has the beneficial effects that：Protective gas delivery pipe is connected to by the utility model with deoxidation material in advance
On consutrode ontology, the fusing synchronous with consutrode ontology of appendix, linear cored deoxidation material is realized, while will protect
Shield property gas and deoxidation material are delivered directly to the top of the slag, improve the convection current of gas and the effect of deoxidier in crystallizer, stablize
Nitrogen partial pressure prevents the reduction of nitrogen in steel content, with the utility model instead of previous hanging Argon and from fire door addition deoxidation
The method of material, preferably controls Deoxidation Atmosphere in Furnace, to protecting oxidizable melting loss of elements and control in Electroslag Process
The gas contents such as hydrogen, oxygen, nitrogen have more obvious effect, and it is heat-resisting to be particularly suitable for the low aluminium boracic control nitrogen of low silicon using this method
The less steel grade of the oxyphilic elements content such as high strength stainless steel.
Description of the drawings
Fig. 1 is the front view of the prior art；
Fig. 2 is the schematic diagram of the utility model.
Reference numeral：Deoxidation material 1, consutrode ontology 2, protective gas delivery pipe 3, protective cover 4, soft high temperature resistant material
Material 5, slag bath 6, molten bath 7, steel ingot 8, crystallizer 9, charge door 10, gas blow pipe 11.
Specific implementation mode
The utility model is further illustrated below.
As shown in Fig. 2, in esr process disclosed by the utility model reducing atmosphere control device, including crystallization
Device 9, consutrode ontology 2, deoxidation material 1 and protective gas delivery pipe 3, the consutrode ontology 2 are set to crystallizer 9
Interior, the protective gas delivery pipe 3 uses self-consuming material, the deoxidation material 1 to may be contained within certainly with protective gas delivery pipe 3
On power pole ontology 2.
Using the control method of device reducing atmosphere in esr process, including：
Deoxidation material 1 and protective gas delivery pipe 3 are set on consutrode ontology 2；
Consutrode ontology 2 with deoxidation material 1 and protective gas delivery pipe 3 is placed in melting in crystallizer 9, is melted
During refining protective gas is conveyed to protective gas delivery pipe 3.
The self-consuming material be with consutrode ontology 2 have similar characteristic, can in fusion process with from
Power pole ontology 2 synchronizes fusing, so that its mouthpiece is at the fusing of consutrode ontology 2 always, while more precisely acting on
In the top of the slag, equally, with the fusing of consutrode ontology 2, deoxidation material 1 thereon is also synchronous into crystallizer 9, as long as in advance
Set the amount of deoxidation material 1 according to demand, it is ensured that deoxidation material 1 be added it is timely with it is accurate.So protected by controlling
The control for reducing atmosphere can be realized in the addition of shield gas and deoxidation material 1.
And for further starvation, protective cover 4 can be set as in the prior art, but the guarantor of the prior art
Shield 4 can not be accomplished to be completely closed because to reserve the channel that deoxidation material 1 is added, and the utility model is then different, this practicality
Novel deoxidation material 1 is just to be additional on consutrode ontology 2 in advance, without reserving opening on protective cover 4, so as to
To realize being completely closed for protective cover 4, concrete mode can be will be between protective cover 4 and consutrode ontology 2 and protective cover 4
It connect and seals by soft heat-resisting material 5 between crystallizer 9.Soft fire resisting may be used in soft heat-resisting material 5
Ceramic fiber cloth or alumina-silica fire Nomex etc..
It, can be with for specific consutrode ontology 2 and protective gas delivery pipe 3 and the connection type of deoxidation material 1
Protective gas delivery pipe 3 and deoxidation material 1 are welded in 2 surface of consutrode ontology, can also be added on consutrode ontology 2
Work hole installs deoxidation material 1 in Mr. Yu's some holes hole, and certain holes are as protective gas delivery pipe 3.In contrast,
Using the former workload smaller, human cost is lower.
Deoxidation material 1, which generally selects, is easy to substance that is with oxidation and not interfering with steel quality, for example, can include small
The mass fraction of grain silicon and little particle calcium, the little particle silicon is 10~30%, the mass fraction of the little particle calcium is 70~
90%.The deoxidation material 1 most preferably uses linear cored deoxidation material 1.Have three using the advantages of linear cored deoxidation material 1,
First, it is just oxidable before melting to can be prevented from deoxidation material 1, second, convenient by wrapping up shell and consutrode ontology 2
Mutually weld, third, its edge is linearly facilitated to be uniformly distributed in an axial direction on consutrode ontology 2, it is described de- in order to ensure uniformity
Oxygen material 1 is at least two.Equally, as a preferred embodiment, the protective gas delivery pipe 3 is at least two, and along axis
To being uniformly distributed on consutrode ontology 2.And in order to ensure the maximization of protective gas effect, the protective gas conveying
The mouthpiece of pipe 3 is downward, and the air blowing flow of each protective gas delivery pipe 3 is consistent with pressure, and is with consutrode ontology 2
Central distribution.Protective gas generally selects rare gas or nitrogen, for example, the guarantor that the protective gas delivery pipe 3 is conveyed
It includes nitrogen and argon gas to protect gas, and the wherein volume fraction of argon gas is 50~100%, and the volume fraction of nitrogen is 0~50%.
The effect of the utility model is described further in data below with embodiment.
1 14 tons of ESR ingot is produced using the utility model.The branch ESR ingot Composition Control is good, successfully melts out conjunction
Lattice ESR ingot.Composition transfer is shown in Table 2 before and after the ESR ingot melting：
When 2 the utility model melting of table, composition transfer (%) before and after melting
| Element | Si | Mn | P | S | Cr | B | Al | O/PPm | N/PPm |
| Before melting | 0.10 | 0.38 | 0.006 | 0.003 | 9.14 | 0.013 | 0.007 | 40 | 256 |
| After melting | 0.11 | 0.39 | 0.006 | 0.001 | 9.12 | 0.011 | 0.008 | 30 | 254 |
Annotation：Si is 0.11% after melting in upper table, is caused by constituent analysis deviation.
It can be seen from Table 2 that using the utility model, the reproducibility gas in esr process can be effectively controlled
Atmosphere, every chemical composition have reached design object, achieve good effect.
Claims (9)
1. the control device of reducing atmosphere in esr process, including crystallizer (9), consutrode ontology (2), deoxidation material
Expect that (1) and protective gas delivery pipe (3), the consutrode ontology (2) are set in crystallizer (9), it is characterised in that：It is described
Protective gas delivery pipe (3) uses self-consuming material, the deoxidation material (1) to may be contained within certainly with protective gas delivery pipe (3)
On power pole ontology (2).
2. the control device of reducing atmosphere in esr process as described in claim 1, it is characterised in that：The crystallization
Protective cover (4) is provided on device (9), between the protective cover (4) and consutrode ontology (2) and protective cover (4) with crystallization
It connects and seals by soft heat-resisting material (5) between device (9).
3. the control device of reducing atmosphere in esr process as claimed in claim 2, it is characterised in that：It is described soft
Heat-resisting material (5) is soft refractory ceramic fibre cloth or alumina-silica fire Nomex.
4. the control device of reducing atmosphere in esr process as described in claim 1, it is characterised in that：The deoxidation
Material (1) and protective gas delivery pipe (3) are arranged on consutrode ontology (2) surface.
5. the control device of reducing atmosphere in esr process as described in claim 1, it is characterised in that：The deoxidation
Material (1) uses linear cored deoxidation material (1).
6. the control device of reducing atmosphere in esr process as claimed in claim 5, it is characterised in that：The deoxidation
Material (1) is at least two, and is uniformly distributed in an axial direction on consutrode ontology (2).
7. the control device of reducing atmosphere in esr process as described in claim 1, it is characterised in that：The protection
Air shooter (3) is at least two, and is uniformly distributed in an axial direction on consutrode ontology (2).
8. the control device of reducing atmosphere in esr process as claimed in claim 7, it is characterised in that：The protection
The mouthpiece of air shooter (3) is downward, and the air blowing flow of each protective gas delivery pipe (3) is consistent with pressure, and with certainly
Power pole ontology is distributed centered on (2).
9. consutrode, which is characterized in that including consutrode ontology (2), deoxidation material (1) and protective gas delivery pipe (3),
The protective gas delivery pipe (3) uses self-consuming material, the deoxidation material (1) to be respectively provided with protective gas delivery pipe (3)
In on consutrode ontology (2).
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| CN201721921464.1U CN207749161U (en) | 2017-12-29 | 2017-12-29 | The control device and consutrode of reducing atmosphere in esr process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296343A (en) * | 2020-09-04 | 2021-02-02 | 武汉科技大学 | Method for preparing superfine metal powder by smelting hollow electrode |
| CN114918385A (en) * | 2022-04-28 | 2022-08-19 | 山东邦巨实业有限公司 | Device and process for controlling nitrogen content in die steel |
| CN115505746A (en) * | 2022-08-29 | 2022-12-23 | 重庆大学 | Smelting method of electroslag remelting ultra-clean steel |
-
2017
- 2017-12-29 CN CN201721921464.1U patent/CN207749161U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296343A (en) * | 2020-09-04 | 2021-02-02 | 武汉科技大学 | Method for preparing superfine metal powder by smelting hollow electrode |
| CN114918385A (en) * | 2022-04-28 | 2022-08-19 | 山东邦巨实业有限公司 | Device and process for controlling nitrogen content in die steel |
| CN115505746A (en) * | 2022-08-29 | 2022-12-23 | 重庆大学 | Smelting method of electroslag remelting ultra-clean steel |
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