CN208815054U - Electric arc furnaces smoke processing system - Google Patents
Electric arc furnaces smoke processing system Download PDFInfo
- Publication number
- CN208815054U CN208815054U CN201821365376.2U CN201821365376U CN208815054U CN 208815054 U CN208815054 U CN 208815054U CN 201821365376 U CN201821365376 U CN 201821365376U CN 208815054 U CN208815054 U CN 208815054U
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- CN
- China
- Prior art keywords
- smoke
- electric arc
- scrap
- arc furnaces
- processing system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000779 smoke Substances 0.000 title claims abstract description 59
- 238000010891 electric arc Methods 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 239000003546 flue gas Substances 0.000 claims abstract description 43
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 239000003517 fume Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- 239000002918 waste heat Substances 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 12
- 235000019504 cigarettes Nutrition 0.000 claims description 7
- 238000003795 desorption Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 1
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000009845 electric arc furnace steelmaking Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The utility model relates to a kind of electric arc furnaces smoke processing systems, the scrap heating bed that mouth is connect are added including smoke explorer and with electric arc furnaces steel scrap, scrap heating bed arrival end is connected with feed bin, and smoke explorer outlet end is connected with fume treatment mechanism；Scrap heating bed bottom is equipped at least one range hood, each range hood is connect with smoke explorer, smoke explorer is equipped with flow regulating unit, and feed bin top is connected with smoke evacuation branch pipe, is connected in smoke explorer by branch pipe of discharging fume and other contact is between fume treatment mechanism and flow regulating unit.By the way that range hood is arranged in scrap heating bed bottom, enables flue gas vertically to penetrate steel scrap layer, improve the heating efficiency and effect of steel scrap；By the way that flow regulating unit is arranged in smoke explorer, flue gas circulation and currency in adjustable scrap heating bed, achieve the purpose that adjust scrap steel preheating effect and adjust the flue-gas temperature converged in smoke explorer, is conducive to subsequent fume afterheat and utilizes process.
Description
Technical field
The utility model belongs to electric arc furnace smelting technical field, and in particular to a kind of electric arc furnaces smoke processing system.
Background technique
It is raw material alloy smelting steel that electric arc furnaces, which generally uses steel scrap, and a large amount of cigarette can be generated during electric arc furnace smelting
Gas, the temperature of these flue gases is up to 1300 DEG C, and according to pertinent literature, high-temperature flue gas has taken away entire electric arc furnaces input heat
21%, if directly emptied these high-temperature flue gas, it is huge waste for the energy system of electric arc furnace smelting, will leads
Smelting cost is caused to increase.
Present steel plant generally use the waste heat of following two recovery method electric arc furnaces high-temperature flue gas, and a kind of method is direct
Allow high-temperature electric arc kiln gas to pass through waste heat boiler and generate steam to recycle heat, another method be using smoke pre-heating steel scrap come
Recycle heat.Have several sides such as Kang Sidi, shaft furnace, bivalve furnace at present using the system of electric arc furnaces high-temperature flue gas preheating scrap
Formula, but these Land use systems have it is various itself be difficult to the shortcomings that overcoming, for example Kang Sidi scrap steel preheating temperature is low, more than steel scrap
Hot mean temperature can only achieve 150 DEG C, and heating is uneven, and the steel scrap temperature for being deposited in lower part is minimum；The finger mechanism of shaft furnace is adopted
With water cooling, the lower easy steel bonding of water cooling finger temperature leads to not open blanking, it requires the absolute altitude of workshop very high, and equipment is huge
Greatly, one-time investment is very high, and is not suitable with the transformation in old electric-arc furnace steelmaking workshop；Furnace land occupation in bivalve is too big, and investment is big.Separately
When outside, using smoke pre-heating steel scrap, extremely toxic substance dioxin can be generated during scrap steel preheating, in order to reduce the danger to environment
Evil, makes flue gas emission reach the standard of statutory regulation, needs to take effective measures come the dioxin in removing smoke.
Utility model content
The utility model embodiment is related to a kind of electric arc furnaces smoke processing system, and the part that can at least solve the prior art lacks
It falls into.
The utility model embodiment is related to a kind of electric arc furnaces smoke processing system, including useless by feed unit and electric arc furnaces
The scrap heating bed of mouth connection is added in steel, and it further includes smoke explorer that the scrap heating bed arrival end, which is connected with feed bin, the row
The outlet end cigarette general pipeline is connected with fume treatment mechanism；Scrap heating bed bottom is equipped at least one range hood, each suction
Petticoat pipe is connect with the smoke explorer, and Yu Suoshu smoke explorer is equipped with flow regulating unit, and the feed bin top is connected with
It discharges fume branch pipe, is connected in the smoke explorer by the smoke evacuation branch pipe and side contact is located at the fume treatment mechanism and the stream
Amount is adjusted between unit.
As one of embodiment, the fume treatment mechanism includes along the sequentially connected pretreatment unit of flue gas circulating direction
And waste heat boiler.
As one of embodiment, the pretreatment unit include along sequentially connected first deduster of flue gas circulating direction and
Pyrolytic room is disposed with burner on the pyrolytic room.
As one of embodiment, first deduster includes expansion chamber.
As one of embodiment, the burner is gas burner.
As one of embodiment, the exhanst gas outlet of the waste heat boiler is connected with release pipeline, Yu Suoshu desorption tube road
It has been sequentially arranged the second deduster, blower and diffusing chimney.
As one of embodiment, the desorption tube road between Yu Suoshu waste heat boiler and second deduster is equipped with activity
Charcoal injection apparatus.
As one of embodiment, feed bin petticoat pipe is equipped with above the feed bin, the feed bin petticoat pipe passes through release branch pipe and institute
Release piping connection is stated, contact is between the waste heat boiler and second deduster by the release branch pipe.
As one of embodiment, the feed bin is vertical bin, and the scrap heating bed accessory has to be connected with the vertical bin
Logical horizontal steel scrap runs channel.
As one of embodiment, the feed bin top is equipped with hermatic door able to turn on or off.
The utility model embodiment at least has the following beneficial effects:
Electric arc furnaces smoke processing system provided by the utility model is made by the way that range hood is arranged in scrap heating bed bottom
Flue gas can vertically penetrate steel scrap layer, can not only heating surface steel scrap, moreover it is possible to heat and deep steel scrap, to improve the heating of steel scrap
Efficiency and effect.Flue gas circulation by the way that flow regulating unit is arranged in smoke explorer, in adjustable scrap heating bed
And the currency, achieve the purpose that adjust scrap steel preheating effect；Meanwhile the flue-gas temperature being discharged in adjustable range hood and row
Flue-gas temperature in cigarette pipe is conducive to subsequent flue gas to achieve the purpose that adjust the flue-gas temperature converged in smoke explorer
UTILIZATION OF VESIDUAL HEAT IN process.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram of electric arc furnaces smoke processing system provided by the embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Such as Fig. 1, the utility model embodiment provides a kind of electric arc furnaces smoke processing system, including by feed unit 2 with
The scrap heating bed 4 of mouth connection is added in electric arc furnaces steel scrap, and 4 arrival end of scrap heating bed is connected with feed bin 5, the scrap heating
The specific structure of bed 4 and the specific structure of feed unit 2 are this field routine techniques, are not repeated herein.The electric arc furnaces cigarette
Gas processing system further includes smoke explorer 9, and 9 outlet end of smoke explorer is connected with fume treatment mechanism；The scrap heating
4 bottoms of bed are equipped at least one range hood 3, and each range hood 3 is connect with the smoke explorer 9, Yu Suoshu smoke explorer 9
It is equipped with flow regulating unit 8,5 top of feed bin is connected with smoke evacuation branch pipe 11, is connected to the row by the smoke evacuation branch pipe 11
On cigarette general pipeline 9 and other contact is between the fume treatment mechanism and the flow regulating unit 8.The flow regulating unit 8
The flow controls component such as regulating valve can be used, the flue gas flow adjusted in smoke explorer 9 can be reached；Range hood 3
Quantity can be one or more, between adjacent range hood 3 can close to arrangement, can also arranged for interval, can be according to steel scrap channel
Length accordingly designs.
Electric arc furnaces smoke processing system provided in this embodiment is made by the way that range hood 3 is arranged in 4 bottom of scrap heating bed
Flue gas can vertically penetrate steel scrap layer, can not only heating surface steel scrap, moreover it is possible to heat and deep steel scrap, to improve the heating of steel scrap
Efficiency and effect.Flue gas circulation by the way that flow regulating unit 8 is arranged in smoke explorer 9, in adjustable scrap heating bed 4
Amount and currency achieve the purpose that adjust scrap steel preheating effect；Meanwhile the flue-gas temperature being discharged in adjustable range hood 3
It is conducive to subsequent with the flue-gas temperature in smoke evacuation branch pipe 11 to achieve the purpose that adjust the flue-gas temperature converged in smoke explorer 9
Fume afterheat utilize process.
Above-mentioned feed bin 5 is preferably vertical bin 5, and at an upper portion thereof or hermatic door 23 able to turn on or off is arranged in top, adds useless
Opened when steel, remaining when close, can prevent flue gas from leaking, guarantee safety, avoid energy loss.Further, above-mentioned steel scrap
Heating bed 4 has the horizontal steel scrap operation channel being connected to vertical bin 5, and the heating of formation steel scrap level adds for two kinds with vertical heating
Hot means, pre-heat effect is preferable, and land occupation is few, lower to requirement on height of workshop.In the present embodiment, as preferred embodiment,
By above-mentioned flow regulating unit 8, blows about 50% high-temperature flue gas vertically and brush giving up in simultaneously heat levels steel scrap operation channel
Steel, after 50% high-temperature flue gas level in addition runs channel and heat steel scrap therein by the horizontal steel scrap, in feed bin 5
It flows straight up, while preheating the steel scrap in the feed bin 5, it is ensured that preferably preheating scrap, the steel scrap temperature after heating
Up to 500~800 DEG C.Meanwhile 9 exit gas temperature of smoke explorer is conducive to subsequent UTILIZATION OF VESIDUAL HEAT IN at 800 DEG C or so.At it
In middle one embodiment, such as Fig. 1, which can be fed by chain-type loading machine, and when charging, steel scrap is picked up steel scrap and put
Enter in steel scrap trolley 13, transport chain drive mechanism 14 drives delivery chain 12, and delivery chain 12 drives steel scrap trolley 13 to transport upwards
Dynamic, steel scrap trolley 13 runs to the top of feed bin 5, and the hermatic door 23 on 5 top of feed bin is opened, and steel scrap is poured into material by steel scrap trolley 13
In storehouse 5, then hermatic door 23 is closed；Steel scrap in scrap heating bed 4 delays under the action of driving device 10 of scrap heating bed 4
Slowly mobile to 1 direction of electric arc furnaces.
The structure of above-mentioned electric arc furnaces smoke processing system, such as Fig. 1 are connected, the fume treatment mechanism includes circulating along flue gas
The sequentially connected pretreatment unit in direction and waste heat boiler 18.Wherein, which can be used for the pre- dedusting of flue gas, can reduce
The work load of subsequent cleaner, while reducing the probability of 18 heating surface of waste heat boiler blocking.I.e. the pretreatment unit includes
First deduster 15, first deduster 15 can be the cleaners such as gravitational precipitator, cyclone dust collectors, in the present embodiment,
It includes expansion chamber 15, and flue gas flow velocity due to actual internal area becomes larger is reduced to 1~2m/s suddenly in expansion chamber 15, in flue gas
Bulky grain flue dust drop under the effect of gravity, separated from flue gas.Above-mentioned waste heat boiler 18 can be with tubulation boiler
To be the boiler plant of the routine such as heat pipe boiler, specific structure is omitted herein.It is further preferred that such as Fig. 1, the pretreatment unit
Further include pyrolytic room 16, is set gradually along above-mentioned first deduster 15 of flue gas circulating direction with pyrolytic room 16, the height
Burner 17 is disposed on warm decomposition chamber 16.By the way that the pyrolytic room 16 is arranged, flue gas can burn and be burned wherein
The flame of device 17 heats, and flue-gas temperature can rise to 900 DEG C or so, exhausted in flue gas when keeping 2s or 2s or more at this temperature
Most dioxin can decompose reaction, guarantee the innoxious of flue gas.Said burner 17 is preferably fuel gas buring
Device 17 can be used natural gas or other clean fuels, not will cause new pollution；The quantity of burner 17 can be according to actual condition
It is selected, in the present embodiment, is controlled at 2~10.800~900 DEG C of the flue gas that pyrolytic room 16 is discharged enters to remaining
Heat boiler 18 is conducive to the operation of waste heat boiler 18, and the water supply heated in waste heat boiler 18 generates steam, can be used for generating electricity etc..
Further, such as Fig. 1, the exhanst gas outlet of the waste heat boiler 18 is connected with release pipeline, in the release pipeline
On be sequentially arranged the second deduster 20, blower 21 and diffusing chimney 22.Wherein, which can be bag-type dusting
The cleaners such as device, electric precipitator guarantee the cleanliness of discharge flue gas.
It is further preferred that the desorption tube road such as Fig. 1, between Yu Suoshu waste heat boiler 18 and second deduster 20
Equipped with active carbon injection apparatus 19.Active carbon powder is sprayed into flue by the active carbon injection apparatus 19, is can absorb
Remaining dioxin and the dioxin recombined in waste heat boiler 18 in flue gas, and absorb the active carbon of dioxin
Grain can be removed in the second deduster 20, thus thorough purifying smoke.
Connect the structure of above-mentioned electric arc furnaces smoke processing system, such as Fig. 1 is equipped with feed bin petticoat pipe 6, institute above the feed bin 5
Feed bin petticoat pipe 6 is stated by release branch pipe 7 and the release piping connection, the 7 side contact of release branch pipe is located at the waste heat pot
Between furnace 18 and second deduster 20.The flue gas that the feed bin petticoat pipe 6 is leaked out from feed bin 5 when can take charging away,
The partial fume is incorporated to desorption tube road, mixes that (exit gas temperature is about 200 with 18 exit gas temperature of waste heat boiler
DEG C), flue-gas temperature can be reduced to 100 DEG C after mixing, can avoid 20 burning bag of the second deduster of sack cleaner formula, mixed flue gas
Through 20 dust separation of the second deduster heel row up to standard to atmosphere.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. a kind of electric arc furnaces smoke processing system, including the scrap heating that mouth is connect is added with electric arc furnaces steel scrap by feed unit
Bed, the scrap heating bed arrival end are connected with feed bin, it is characterised in that: and it further include smoke explorer, the smoke explorer outlet
End is connected with fume treatment mechanism；Scrap heating bed bottom is equipped at least one range hood, and each range hood is and institute
Smoke explorer connection is stated, Yu Suoshu smoke explorer is equipped with flow regulating unit, and the feed bin top is connected with smoke evacuation branch pipe, institute
It states and is connected in the smoke explorer by smoke evacuation branch pipe and other contact is located at the fume treatment mechanism and the flow regulating unit
Between.
2. electric arc furnaces smoke processing system as described in claim 1, it is characterised in that: the fume treatment mechanism includes along cigarette
The sequentially connected pretreatment unit of gas circulating direction and waste heat boiler.
3. electric arc furnaces smoke processing system as claimed in claim 2, it is characterised in that: the pretreatment unit includes along flue gas
Sequentially connected first deduster of circulating direction and pyrolytic room are disposed with burner on the pyrolytic room.
4. electric arc furnaces smoke processing system as claimed in claim 3, it is characterised in that: first deduster includes sedimentation
Room.
5. electric arc furnaces smoke processing system as claimed in claim 3, it is characterised in that: the burner is gas burner.
6. electric arc furnaces smoke processing system as claimed in claim 2, it is characterised in that: the exhanst gas outlet of the waste heat boiler connects
It is connected to release pipeline, Yu Suoshu desorption tube road has been sequentially arranged the second deduster, blower and diffusing chimney.
7. electric arc furnaces smoke processing system as claimed in claim 6, it is characterised in that: Yu Suoshu waste heat boiler and described second
Desorption tube road between deduster is equipped with active carbon injection apparatus.
8. electric arc furnaces smoke processing system as claimed in claim 6, it is characterised in that: be equipped with feed bin cigarette above the feed bin
Cover, the feed bin petticoat pipe are located at the waste heat by release branch pipe and the release piping connection, release branch pipe side contact
Between boiler and second deduster.
9. electric arc furnaces smoke processing system as described in claim 1, it is characterised in that: the feed bin is vertical bin, described
Scrap heating bed accessory has the horizontal steel scrap being connected to the vertical bin to run channel.
10. the electric arc furnaces smoke processing system as described in claim 1 or 9, it is characterised in that: the feed bin top is equipped with and can open
The hermatic door closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821365376.2U CN208815054U (en) | 2018-08-23 | 2018-08-23 | Electric arc furnaces smoke processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821365376.2U CN208815054U (en) | 2018-08-23 | 2018-08-23 | Electric arc furnaces smoke processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208815054U true CN208815054U (en) | 2019-05-03 |
Family
ID=66274407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821365376.2U Active CN208815054U (en) | 2018-08-23 | 2018-08-23 | Electric arc furnaces smoke processing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208815054U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459258A (en) * | 2022-02-15 | 2022-05-10 | 江苏大学 | Electric arc furnace flue gas system with waste heat recovery and energy storage functions |
| CN114507764A (en) * | 2022-02-22 | 2022-05-17 | 江苏蓝创环保科技有限公司 | Device for heating scrap steel |
| CN116855671A (en) * | 2023-07-18 | 2023-10-10 | 唐山首唐宝生功能材料有限公司 | Steelmaking electric arc furnace pipe system |
-
2018
- 2018-08-23 CN CN201821365376.2U patent/CN208815054U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459258A (en) * | 2022-02-15 | 2022-05-10 | 江苏大学 | Electric arc furnace flue gas system with waste heat recovery and energy storage functions |
| CN114507764A (en) * | 2022-02-22 | 2022-05-17 | 江苏蓝创环保科技有限公司 | Device for heating scrap steel |
| CN116855671A (en) * | 2023-07-18 | 2023-10-10 | 唐山首唐宝生功能材料有限公司 | Steelmaking electric arc furnace pipe system |
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