CN107893158A - A kind of solid solution furnace of feed inlet and outlet band sealing gas curtain - Google Patents
A kind of solid solution furnace of feed inlet and outlet band sealing gas curtain Download PDFInfo
- Publication number
- CN107893158A CN107893158A CN201711335364.5A CN201711335364A CN107893158A CN 107893158 A CN107893158 A CN 107893158A CN 201711335364 A CN201711335364 A CN 201711335364A CN 107893158 A CN107893158 A CN 107893158A
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- 239000006104 solid solution Substances 0.000 title claims abstract description 31
- 238000007789 sealing Methods 0.000 title claims abstract description 16
- 239000000243 solution Substances 0.000 claims abstract description 24
- 230000001351 cycling effect Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000007373 indentation Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 10
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The present invention relates to the solid solution furnace of feed inlet and outlet band sealing gas curtain, it includes：Body of heater, it includes furnace shell, furnace lining and respectively positioned at the fire door at inlet and outlet both ends；Cycling element；Heater, it includes the burner stretched into from the side of body of heater in body of heater, wherein entrance of the air stream outlet of burner close to cycling element；Transmission system；Particularly, solid solution furnace also includes the gas curtain at the inlet and outlet both ends for being respectively formed at body of heater, and the air-flow that wherein gas curtain can prevent the air-flow in the external world from entering in body of heater and in body of heater leaks.The present invention by the disengaging end of solid solution furnace formed with gas curtain to prevent the outflow of the inflow of external air flow and gas stream in the stove, while by burner outlet position so that furnace temperature is evenly, so that it is guaranteed that the quality of solution treatment and the waste for preventing the energy, it is simple in construction, it is easy to implement, and cost is low.
Description
Technical field
The invention belongs to aluminum alloy heat process field, and in particular to a kind of solid solution furnace of feed inlet and outlet band sealing gas curtain.
Background technology
It is well known that aluminium alloy is using extremely extensive a kind of non-ferrous metal in industrial production, heat treatment process is aluminium
Alloy product must through one of processing routine, generally include solution treatment, Quenching Treatment and Ageing Treatment.
And so-called solution treatment：Refer to and alloy is heated to the constant temperature holding of high temperature monophase field, superfluous phase is fully dissolved into
Quick cooling after in solid solution, to obtain the Technology for Heating Processing of supersaturated solid solution.
Meanwhile solution heat treatment furnace system periodic operating resistance furnace, it is mainly used in the heating of aluminium alloy parts solution treatment
It is used.With furnace temperature uniformly, quick heating, enter the advantages such as the water time is short, energy resource consumption is low.
In general solution heat treatment furnace includes the transmission of heating furnace body, thermal circulation fan, flow guide system and aluminium alloy castings
System, wherein heating furnace body are mainly made up of furnace shell, furnace lining, fire door, stove-door switching mechanism and heating element heater.
However, the defects of very big in practical operation be present, that is,：When a door is opened, on the one hand the air-flow in the external world is easy
Into in stove, the quality of product heat treatment is influenceed；Air-flow in another aspect stove easily flows out from stove, causes the wave of the energy
Take.Meanwhile conventional processing unit (plant) is all the entrance away from thermal circulation fan, therefore, it is difficult to realize the uniformity of furnace temperature.
The content of the invention
The technical problems to be solved by the invention are overcome the deficiencies in the prior art, there is provided a kind of feed inlet and outlet band blanket gas
The solid solution furnace of curtain, its by the disengaging end of solid solution furnace formed with gas curtain to prevent the inflow of external air flow and gas stream in the stove
Outflow, so that it is guaranteed that the quality of solution treatment and the waste for preventing the energy.
To solve above technical problem, the present invention adopts the following technical scheme that：
A kind of solid solution furnace of feed inlet and outlet band sealing gas curtain, it includes：
Body of heater, it includes furnace shell, furnace lining and respectively positioned at the fire door at inlet and outlet both ends；
Cycling element；
Heater, it includes the burner stretched into from the side of body of heater in body of heater, and wherein the air stream outlet of burner is close follows
The entrance of ring element；
Transmission system；
Particularly, solid solution furnace also includes the gas curtain at the inlet and outlet both ends for being respectively formed at body of heater, and wherein gas curtain can prevent outer
The air-flow that the air-flow on boundary enters in body of heater and in body of heater leaks.
Preferably, guiding subassembly is provided with solid solution furnace inlet and outlet both ends respectively, workpiece passes in and out from the lower section of guiding subassembly
In body of heater, and guiding subassembly includes number of guide plate, wherein number of guide plate shape into air-flow be divided into two strands, one flows to body of heater
Both sides form circulating current, another plume closes to form gas curtain to fire door and by fire door.
Have eight according to one of present invention specific implementation and preferred aspect, deflector, wherein two panels deflector respectively from
The conducting element that one end docks and closes the passage formed between two panels deflector, the conducting element is by guiding subassembly away from fire door
The closed end of the deflector is installed, remaining deflector is spaced apart successively with the center of guiding subassembly, and is formed to both sides
The gas channel of guiding and the gas channel being oriented to fire door, wherein the gas channel per side has three, by guiding subassembly
Air-flow forms circulating current from three gas channels of both sides, and be oriented to gas channel to fire door forms gas curtain at fire door.
Preferably, body of heater is divided into multiple solution areas from import to outlet, and is equipped with each solution area so that air-flow
The cycling element of circulation.Meanwhile each solution area is correspondingly provided with heater, and in the solution area of body of heater import at least
Provided with two heaters.By the distribution of heater, solid solution efficiency and effect are improved, while also save energy consumption.
According to another specific implementation of the present invention and preferred aspect, cycling element include in the furnace lining and with furnace lining
Top and both sides form the kuppe of runner, realize gas in body of heater positioned at top and by the air-flow in kuppe to both sides shunting
Flow the circulating fan of circulation and be arranged on the bottom of described kuppe for two sidewinds to be led to kuppe top
To water conservancy diversion module, wherein be provided with the breach that is connected with the circulating fan at the top of kuppe, circulating fan is by kuppe
Air-flow extract out and flowed back to again from both sides kuppe formed airflow circulating.
Preferably, cycling element also includes the guiding subassembly for being arranged on indentation, there, and the guiding subassembly includes number of guide plate,
Wherein number of guide plate shape into air-flow flow to form circulating current to the both sides of body of heater.
Specifically, deflector has eight, wherein there are two groups of deflectors to dock to form conducting element from one end, and the conducting element
The both ends imported and exported towards body of heater are closed respectively, remaining deflector is spaced apart successively with the center of guiding subassembly, and shape
Into six passages being oriented to both sides, wherein be provided with three gas channels per side, by the air-flow of guiding subassembly from the three of both sides
Individual gas channel forms circulating current in body of heater.
Preferably, water conservancy diversion module is included from the first horizontal-extending module of the one of kuppe lateral middle part, from the first module
Continue the second module extended in the middle part of kuppe and height becomes larger in end in the middle part of kuppe.
Further, the upper surface of the first module is horizontal-extending, and surface is along the upper of the first module above the second module
Surface is gradually upturned in arcwall face from from both ends to lower recess, both sides from the air-flow that kuppe bottom enters along dampening
Plane and arcwall face flow up.
In addition, burner includes device body, is set in device body peripheral and the air-flow of burning is imported into leading in kuppe
Flow tube, the outlet end for being located at mozzle and the bend pipe for being oriented to air-flow downwardly toward workpiece flow, wherein bend pipe is close to circulated air
The entrance of machine is set.So, hot fluid portion caused by burning is oriented to and then quick by eight deflectors to body of heater both sides
The bottom of popular kuppe, remainder hot-fluid flow directly into kuppe, so as to which gas stream in the stove is well mixed, it is ensured that workpiece is equal
Solution treatment is carried out at even temperature.
Due to the implementation of above technical scheme, the present invention has the following advantages that compared with prior art：
The present invention formed with gas curtain in the disengaging end of solid solution furnace by preventing the stream of the inflow of external air flow and gas stream in the stove
Go out, while by burner outlet position so that furnace temperature evenly, so that it is guaranteed that the quality of solution treatment and preventing the wave of the energy
Take, it is simple in construction, it is easy to implement, and cost is low.
Brief description of the drawings
Below in conjunction with the accompanying drawings and specific embodiment, the present invention will be further described in detail：
Fig. 1 is the schematic front view of solid solution furnace of the present invention；
Fig. 2 is the longitudinal cross-section schematic diagram of solid solution furnace of the present invention；
Fig. 3 is to move towards schematic diagram positioned at body of heater interior air-flow；
Fig. 4 is that air-flow moves towards schematic diagram at fire door；
Wherein：1st, body of heater；10th, furnace shell；11st, furnace lining；12nd, fire door；12a；Avoid breach；13rd, solution area；2nd, heater；20、
Burner；200th, device body；201st, mozzle；202nd, bend pipe；3rd, cycling element；30th, kuppe；31st, circulating fan；32nd, lead
Flow module；321st, the first module；322nd, the second module；4th, transmission system；40th, delivery roll；41st, delivery roll is fed；42nd, discharging passes
Defeated roller；5th, gas curtain；6th, guiding subassembly；60th, deflector；61st, conducting element；6t, 6d, gas channel.
Embodiment
As shown in Figures 1 to 4, the solid solution furnace for the feed inlet and outlet band sealing gas curtain that the present embodiment provides, it includes body of heater 1,
It includes furnace shell 10, furnace lining 11 and respectively positioned at the fire door 12 at inlet and outlet both ends；Cycling element 3；Heater 2, it includes
The burner 20 stretched into from the side of body of heater 1 in body of heater 1, wherein entrance of the air stream outlet of burner 20 close to cycling element 3；
Transmission system 4；And the gas curtain 5 at the inlet and outlet both ends of body of heater 1 is respectively formed at, wherein gas curtain 5 can prevent the gas in the external world
The air-flow that stream enters in body of heater 1 and in body of heater 1 leaks.
Cycling element 3 include in the furnace lining 11 and with the top of furnace lining 11 and both sides formed runner kuppe 30,
The circulating fan 31 of the interior air-flow of body of heater 1 circulation, Yi Jishe are realized positioned at top and by the air-flow in kuppe 30 to both sides shunting
Put and be used for the water conservancy diversion module 32 that two sidewind guides are flowed to cover top guide in the bottom of kuppe 30, wherein in kuppe 30
Top is provided with breach, and the air-flow in kuppe 30 is extracted out and flows back to kuppe 30 from both sides by circulating fan 31 from breach, completes
Airflow circulating.
Water conservancy diversion module 32 includes from the first horizontal-extending module 321 of the one of kuppe 30 lateral middle part, from the first module
Continue the second module 322 extended to the middle part of kuppe 30 and height becomes larger in 321 end in the middle part of kuppe 30.
Have, the upper surface of the first module 321 is horizontal-extending, and surface is along the first module above the second module 322
321 upper surface is gradually upturned in arcwall face from from both ends to lower recess, and both sides enter from the bottom of kuppe 30
Air-flow flows up along horizontal plane and arcwall face.
In this example, body of heater 1 is divided into multiple solution areas 13 from import to outlet, and be equipped with each solution area 13 so that
The cycling element 3 of airflow circulating.Meanwhile each solution area 13 is correspondingly provided with heater 2, and consolidating close to the import of body of heater 1
At least provided with two heaters 2 in molten area 13.By the distribution of heater 2, solid solution efficiency and effect are improved, while also save
About energy consumption.
Further, it is respectively equipped with guiding subassembly 6 in each solution area 13.The guiding subassembly 6 is located at each circulated air
The lower section of machine 31, workpiece pass through from the bottom of guiding subassembly 6.
Specifically, when in the solution area that guiding subassembly 6 is located remotely from fire door position, its main purpose is：In body of heater
Interior formation circulating current（With reference to Fig. 3）.
Guiding subassembly 6 includes eight deflectors 60, and wherein two panels deflector 60 docks from one end and leads two panels respectively
The conducting element 61 of the passage closure formed between flowing plate 60, and the conducting element 61 will be towards fire door（Enter and go out）Both ends close, and remain
Remaining deflector 60 is spaced apart and forms six gas channel 6t successively around the center of guiding subassembly 6, wherein being provided with per side
Three gas channel 6t, circulating current is formed in body of heater from three gas channels of both sides by the air-flow of guiding subassembly 6.From
And ensure the uniformity of in-furnace temperature.
When guiding subassembly 6 is located at close to fire door（Enter and go out end）When in the solution area of position, its main purpose is：1、
Circulating current is formed in body of heater；2nd, gas curtain 5 is formed at fire door（With reference to Fig. 4）.
Specifically, guiding subassembly 6 includes eight deflectors 60, wherein two panels deflector 60 is docked and incited somebody to action from one end respectively
The conducting element 61 of the passage closure formed between two panels deflector 60, the conducting element 61 should by the remote fire door installation of guiding subassembly
The closed end of deflector 60, remaining deflector 60 is spaced apart successively with the center of guiding subassembly 6, and is formed and led to both sides
To gas channel 6t and the gas channel 6d that is oriented to fire door, wherein having three per the gas channel 6t of side, by water conservancy diversion group
The air-flow of part 6 forms circulating current from three gas channel 6t of both sides in body of heater, to fire door be oriented to gas channel 6d
Fire door forms gas curtain 5.
Burner 20 includes device body 200, is set in the periphery of device body 200 and imports the air-flow of burning in kuppe 30
Mozzle 201, the bend pipe 202 that is located at the outlet end of mozzle 201 and is oriented to air-flow downwardly toward workpiece flow, wherein curved
Pipe 202 is set close to the entrance of circulating fan 31.So, hot fluid portion caused by burning passes through eight deflectors to body of heater
Both sides are oriented to and then the bottom of quick popular kuppe, remainder hot-fluid flow directly into kuppe, so as to which gas stream in the stove mixes
It is more uniform, it is ensured that workpiece carries out solution treatment under uniform temperature.
In addition, transmission system 4 includes flushing more delivery rolls 40 of setting in body of heater 1, imports and exports two positioned at body of heater 1
The charging delivery roll 41 and discharging delivery roll 42 of end, wherein being provided with positioned at the bottom of fire door 12 of the entrance of body of heater 1 to keep away
Drive the avoidance breach 12a of material delivery roll 41 into；It also is provided with that discharging biography can be avoided positioned at the bottom of fire door 12 in the exit of body of heater 1
The avoidance breach 12a of defeated roller 42.
In summary, guiding subassembly is respectively equipped with by the import and export in body of heater in this example, passes through the air-flow of its guiding
Gas curtain is formed in import and export, so as to prevent the outflow of the inflow of external air flow and gas stream in the stove, and then ensures solution treatment
Quality and the waste for preventing the energy；Again by the setting of heater so that furnace temperature is more uniform, while the efficiency and effect being dissolved
With being obviously improved, in addition, it is simple in construction, it is easy to implement, and cost is low.
The present invention is described in detail above, its object is to allow the personage for being familiar with this art to understand this
The content of invention is simultaneously carried out, and it is not intended to limit the scope of the present invention, all Spirit Essence institutes according to the present invention
The equivalent change or modification of work, it should all cover within the scope of the present invention.
Claims (10)
1. a kind of solid solution furnace of feed inlet and outlet band sealing gas curtain, it includes：
Body of heater, it includes furnace shell, furnace lining and respectively positioned at the fire door at inlet and outlet both ends；
Cycling element；
Heater, it includes the burner stretched into from the side of the body of heater in the body of heater, wherein the gas of the burner
Entrance of the flow export close to the cycling element；
Transmission system；
It is characterized in that：Described solid solution furnace also includes the gas curtain at the inlet and outlet both ends for being respectively formed at the body of heater, wherein
The air-flow that described gas curtain can prevent the air-flow in the external world from entering in the body of heater and in the body of heater leaks.
2. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 1, it is characterised in that：Respectively in the solid solution
Stove inlet and outlet both ends are provided with guiding subassembly, and workpiece described is led from the lower section of the guiding subassembly disengaging body of heater
Stream component includes number of guide plate, and the air-flow that deflector is formed wherein described in multi-disc is divided into two strands, and one flows to the both sides of body of heater
Circulating current is formed, another plume is closed to form described gas curtain to fire door and by fire door.
3. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 2, it is characterised in that：Described deflector has
Eight, the conducting element that wherein two panels deflector docks from one end and closes the passage formed between two panels deflector respectively,
Described conducting element installs the guiding subassembly away from fire door the closed end of the deflector, and remaining deflector is led with described
The center of stream component is spaced apart successively, and forms the gas channel being oriented to both sides and the gas channel being oriented to fire door, its
In per the gas channel of side have three, form circulating air from three gas channels of both sides by the air-flow of the guiding subassembly
Stream, it is oriented to gas channel to fire door and described gas curtain is formed at fire door.
4. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 1, it is characterised in that：Described body of heater enters certainly
Mouth is divided into multiple solution areas to outlet, and is equipped with the cycling element for causing airflow circulating in each solution area.
5. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 4, it is characterised in that：Described cycling element
Including forming the kuppe of runner in the furnace lining and with the top of furnace lining and both sides, positioned at top and by the water conservancy diversion
Air-flow in cover realizes the circulating fan of body of heater interior air-flow circulation to both sides shunting and is arranged on the bottom of described kuppe
For the water conservancy diversion module by two sidewinds to the kuppe top guide, wherein at the top of described kuppe be provided with it is described
The air-flow of the kuppe is extracted out and flows back to described water conservancy diversion again from both sides by the breach that circulating fan is connected, circulating fan
Cover forms airflow circulating.
6. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 5, it is characterised in that：Described cycling element
Also include the guiding subassembly for being arranged on the indentation, there, described guiding subassembly includes number of guide plate, wherein number of guide plate
The air-flow of formation flows to form circulating current to the both sides of body of heater.
7. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 6, it is characterised in that：Deflector has eight,
Wherein there are two groups of deflectors to dock to form conducting element from one end, and the both ends that the conducting element will be imported and exported towards body of heater respectively
Closure, remaining deflector is spaced apart successively with the center of guiding subassembly, and forms six passages being oriented to both sides, wherein often
Side is provided with three gas channels, and circulating air is formed in body of heater from three gas channels of both sides by the air-flow of guiding subassembly
Stream.
8. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 5, it is characterised in that：Described water conservancy diversion module
Including the first horizontal-extending module of the lateral middle part from the kuppe, from the first described module close to the kuppe
Continue the second module extended in the middle part of the kuppe and height becomes larger in the end at middle part.
9. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 8, it is characterised in that：The first described module
Upper surface it is horizontal-extending, upper surface of the surface along the first module is gradually upturned in from two above second module
Arcwall face from end to lower recess, both sides from kuppe bottom enter air-flow flowed up along horizontal plane and arcwall face.
10. the solid solution furnace of feed inlet and outlet band sealing gas curtain according to claim 5, it is characterised in that：The burner bag
The mozzle that includes device body, be set in the device body peripheral and import the air-flow of burning in the kuppe, be located at it is described
The outlet end of mozzle and the bend pipe for being oriented to air-flow downwardly toward workpiece flow, wherein the bend pipe is close to the circulating fan
Entrance set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711335364.5A CN107893158A (en) | 2017-12-14 | 2017-12-14 | A kind of solid solution furnace of feed inlet and outlet band sealing gas curtain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711335364.5A CN107893158A (en) | 2017-12-14 | 2017-12-14 | A kind of solid solution furnace of feed inlet and outlet band sealing gas curtain |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796200A (en) * | 2018-06-13 | 2018-11-13 | 江阴市华正金属科技有限公司 | Hot rolling steel ball tempering process |
| CN109307075A (en) * | 2018-11-07 | 2019-02-05 | 重庆长安工业(集团)有限责任公司 | Hermetic seal protective device |
| CN109827329A (en) * | 2019-01-24 | 2019-05-31 | 上海耕野机电科技有限公司 | A kind of novel high-frequency air-heating furnace |
| WO2020114174A1 (en) * | 2018-12-04 | 2020-06-11 | 苏州中门子工业炉科技有限公司 | Pure-hydrogen bright solution heat treatment roller-hearth furnace for high-temperature nickel-based alloy pipes and process |
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