CN208485937U - A kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment - Google Patents
A kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment Download PDFInfo
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- CN208485937U CN208485937U CN201820728259.1U CN201820728259U CN208485937U CN 208485937 U CN208485937 U CN 208485937U CN 201820728259 U CN201820728259 U CN 201820728259U CN 208485937 U CN208485937 U CN 208485937U
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- ammonia
- jet pipe
- fumarole
- steel band
- nozzle structure
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Abstract
The utility model relates to a kind of ammonia nozzle structures for high magnetic induction grain-oriented silicon steel Nitrizing Treatment, the ammonia nozzle structure, including furnace shell, ammonia jet pipe, the ammonia jet pipe can put in and exit furnace shell, the direction of motion that the ammonia jet pipe puts in and exits is vertical with the direction of motion of steel band, the ammonia jet pipe is equipped with several fumaroles, it is characterized by: the direction of motion of the oblique opposite steel band of fumarole, the angle Wei 〆 that the fumarole and the ammonia jet pipe line of centres and vertical line are in, the utility model is due to using spray orifice outgassing direction and strip traffic direction in the structure of a clamp angle 〆, the ammonia of ejection and the time of contact of steel band are long, provide the decomposition amount of ammonia, improve the service efficiency and nitriding quality of ammonia.
Description
Technical field
The utility model relates to technical field of metal material heat treatment, more particularly to high magnetic induction grain-oriented silicon steel Nitrizing Treatment
A kind of technical field, and in particular, to ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment.
Background technique
The nitrogen treatment of metal material, which refers to, makes nitrogen-atoms penetrate into workpiece surface in a kind of medium certain at a certain temperature
Chemical heat treatment process.NH3 gas starts to thermally decompose at 570 DEG C as follows: the N that NH3 → (N) Fe+3/2H2 is decomposited,
With and diffuse into steel surface formed Fe2-3N gas nitriding.Before high magnetic induction grain-oriented silicon steel secondary recrystallization, ALN particle is got over
More, finished product magnetic induction intensity is bigger.Nitrogen is added in steel, needs higher hot-rolled temperature, and will cause slab matter
Measure defect.Carrying out Nitrizing Treatment in the cold rolling decarburizing annealing stage can be with the effective solution above problem.
The ammonia nozzle structure of the high magnetic induction grain-oriented silicon steel Nitrizing Treatment of the prior art as shown in figure 2 a andb, heat-treatment furnace
1 two sides of furnace shell be equipped with and can horizontally enter into the ammonia jet pipe of furnace shell, when carrying out Nitrizing Treatment, the steel band of Nitrizing Treatment to be made
Or workpiece vertically moves in furnace shell, Fig. 2A is to be shown as the vertical section of the steel band direction of motion, and the direction of motion of steel band is
Into paper or paper direction is left, is respectively equipped with ammonia jet pipe leaving certain distance above and below steel band.Such as Fig. 2 B
Shown, steel band of the upper and lower ammonia jet pipe into movement vertically sprays ammonia.Furnace gas is unevenly distributed after decomposing because of NH3, is led
It causes to carry out nitriding low efficiency.
In existing nitriding unit, ammonia nitriding is passed through there are two types of modes, first is that ammonia being passed through by furnace shell side wall
Pipe directly sprays to inside burner hearth, and the atmosphere of ammonia is formed in furnace, carries out Nitrizing Treatment to high magnetic induction grain-oriented silicon steel (see Fig. 1).
Another kind is passed through using stainless steel jet pipe, wherein stainless steel jet pipe is spacing 100mm, aperture 3mm, jet angle
Degree is that vertical strip sprays.
It is passed through in mode in the first ammonia, because ammonia is passed through from two sides, causes along burner hearth cross-sectional direction ammonia
Concentration distribution is uneven, eventually leads to high magnetic induction grain-oriented silicon steel nitriding amount along cross-sectional direction and two sides height occurs, centre is low to be showed
As influencing the electromagnetic performance of finished product.
It is passed through in mode in second of ammonia, ammonia is passed through using high temperature resistant stainless steel pipe, advantage is the high temperature at 900 DEG C
Under state, stainless steel tube performance is stablized, and thermal deformation will not occur, be conducive to continuous production.The disadvantage is that the Ni in stainless steel is
The catalyst for promoting ammonia to decompose, during ammonia is passed through, the ammonia in jet pipe is decomposed reaction, generation nitrogen and hydrogen
Gas, the ammonia amount for finally spraying to high magnetic induction grain-oriented silicon steel surface will be reduced, and affect nitrogenizing effect.In addition, because of spray orifice spacing
It is excessive, it causes the ammonia amount for being ejected into belt steel surface to be unevenly distributed, causes nitrogenizing effect poor.
Therefore, market needs to solve the nitridation technique that injection ammonia amount was unevenly distributed, caused nitrogenizing effect difference, the application
It develops after study, has createed a kind of ammonia jet pipe knot for high magnetic induction grain-oriented silicon steel Nitrizing Treatment of the utility model
Structure.
Utility model content
The purpose of this utility model is that a kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment is disclosed,
The structure is used for high magnetic induction grain-oriented silicon steel Nitrizing Treatment, is evenly distributed and sets to solve ammonia flow, pressure in nitriding process
Meter.
The purpose of this utility model is realized as follows: one kind being used for high magnetic induction grain-oriented silicon steel Nitrizing Treatment
Ammonia nozzle structure, including furnace shell, ammonia jet pipe, the ammonia jet pipe can put in and exit furnace shell, the ammonia jet pipe put in and
The direction of motion exited is vertical with the direction of motion of steel band, which is equipped with several fumaroles, it is characterised in that: jet
The angle that the direction of motion of the oblique opposite steel band in hole, the fumarole and the ammonia jet pipe line of centres and vertical line are in is 〆.
Several fumarole orientations are parallel with the axis of air jet pipe.
Spacing between the fumarole is 40mm to 100mm, and the aperture of fumarole is 2mm to 4mm.
The angle Wei 〆 that the fumarole and the ammonia jet pipe line of centres and vertical line are in is 30 ° to 60 °, and optimum angle is
45°。
The vertical range of the ammonia jet pipe and steel band is 200mm-300mm.
The ammonia jet pipe material is silicon carbide, and silicon carbide material has preferable high-temperature stability, ensure that high temperature
Under state, thermal deformation will not occur for jet pipe.Ammonia decomposition catalyst Ni is free of in silicon carbide material, not will lead to ammonia and is being passed through
Accelerated decomposition in the process.
After a kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment of the utility model, bring
It is following the utility model has the advantages that
1, due to using the structure that spray orifice outgassing direction and strip traffic direction are in a clamp angle 〆, the ammonia of ejection with
The time of contact of steel band is long, provides the decomposition amount of ammonia, improves the service efficiency of ammonia.
2, the structure using spray orifice outgassing direction and strip traffic direction in a clamp angle 〆, the ammonia of ejection are also due to
The contact surface of gas and steel band increases, and more evenly, nitriding is high-quality for contact of the ammonia with steel band.
3, it is also due to the structure using spray orifice outgassing direction with strip traffic direction in a clamp angle 〆, ammonia reaches
The distance of steel strip surface is greater than the vertical distance for reaching steel band, relatively lower speed when ammonia contacts steel strip surface, avoids
Speed when ammonia is ejected into belt steel surface is unsuitable too fast, and influences the uniformity of nitriding.
4, it is also due to the ammonia jet pipe using silicon carbide material, state when ammonia is in jet pipe is more stable, will not
It decomposes in advance reaction, improves the utilization efficiency of ammonia.In order to be more fully understood the construction of the utility model, tie below
Attached drawing is closed, the utility model is described in detail by specific embodiment.
Detailed description of the invention
The structural schematic diagram of burner hearth before Fig. 1 Nitrizing Treatment；
Ammonia nozzle structure schematic diagram in Fig. 2A prior art Nitrizing Treatment；
Fig. 2 B shows the side structure schematic diagram of Fig. 2A；
Ammonia nozzle structure schematic diagram in the Nitrizing Treatment of Fig. 3 A the utility model；
Fig. 3 B shows the side structure schematic diagram of Fig. 3 A；
Fig. 4 is the position view between the fumarole of the upper and lower ammonia jet pipe of the utility model.In attached drawing:
1-furnace shell；
2-steel bands, A-steel band direction of travel；
3 lower ammonia jet pipes, fumarole 31；
4-upper ammonia jet pipes, fumarole 41；
5-ammonia flows；
The angle of 〆-ammonia flow and vertical line；
H-vertical range of the ammonia jet pipe center from steel band.
Specific embodiment
Ammonia nozzle structure schematic diagram in the Nitrizing Treatment of Fig. 3 A the utility model；As shown, a kind of be used for high magnetic
Feel the ammonia nozzle structure of orientation silicon steel Nitrizing Treatment, including furnace shell 1, ammonia jet pipe 3 and 4, ammonia jet pipe 3 are located at steel band 2
In the following, ammonia jet pipe 4 is located at the upper surface of steel band 2, ammonia jet pipe 3 and 4 is driven and is controlled by ammonia jet driving device 7 and 6 respectively
System, ammonia jet driving device 7 control ammonia jet pipe 3 and put in and exit furnace shell 1, and ammonia jet driving device 6 controls ammonia spray
Pipe 4 puts in and exits furnace shell 1, and when control ammonia jet pipe 3 and 4 puts in furnace shell 1, ammonia jet driving device 7 and 6 is simultaneously to ammonia
Conveying has the ammonia of setting pressure in gas blowout pipe 3 and 4, in the jet pipe 3 and 4 gas pressure can according to it is vertical with steel band 1 away from
From size be adjusted.
The ammonia jet pipe 3 and 4 is simultaneously operable, and also be can according to need single ammonia jet pipe 3 or 4 and is worked independently.?
When needing to carry out Nitrizing Treatment to the one side of steel band 2, start one of ammonia jet pipe of ammonia jet pipe 3 and 4；When needing to steel
When all carrying out Nitrizing Treatment with 2 top and bottom, while starting the work of ammonia jet pipe 3 and 4.Ammonia jet pipe 3 and/or 4 can put in and
Furnace shell 1 is exited, the direction of motion which puts in and exit is vertical with the direction of motion of steel band 2.
Fig. 3 B shows the side structure schematic diagram of Fig. 3 A, as shown, the ammonia jet pipe 3 is located at the lower section of steel band 2, the ammonia
Gas blowout pipe 3 is equipped with several fumaroles 31, and the fumarole 31 is oblique upwards against the direction of motion of steel band 2, ammonia jet pipe center
The angle Wei 〆 of ray and vertical line between point and the fumarole 31, between ammonia jet pipe central point and the fumarole 31
The angle Wei 〆 that ray and vertical line are in is 30 ° to 60 °, and optimum angle is 45 °.
The ammonia jet pipe 4 is located at the top of steel band 2, which is equipped with several fumaroles 41, the fumarole 41
Obliquely downwards against the direction of motion A of steel band 2, the folder of ray and vertical line between ammonia jet pipe central point and the fumarole 41
Jiao Wei 〆, the angle Wei 〆 that ray and vertical line between ammonia jet pipe central point and the fumarole 41 are in is 30 ° to 60 °, most
Good angle is 45 °.
The fumarole 31 that ammonia jet pipe 3 is arranged in is arranged in a linear, and the direction of straight line is parallel with the axis of air jet pipe 3.Its
Described in each fumarole 31 between spacing be 40mm to 100mm, the aperture of fumarole 31 is 2mm to 4mm.The ammonia
The vertical range of gas blowout pipe 3 and steel band 2 is 200mm-300mm.
The fumarole 41 that ammonia jet pipe 4 is arranged in is arranged in a linear, and the direction of straight line is parallel with the axis of air jet pipe 4.Its
Described in each fumarole 41 between spacing be 40mm to 100mm, the aperture of fumarole 41 is 2mm to 4mm.The ammonia
The vertical range of gas blowout pipe 4 and steel band 2 is 200mm-300mm.
Fig. 4 is the position view between the fumarole of the upper and lower ammonia jet pipe of the utility model, as shown in figure 4, being located at
The distance between fumarole 41 on both sides on upper ammonia jet pipe 4 is B2；It is located at the fumarole 31 on the both sides on lower ammonia jet pipe 3
The distance between be also B2, the width of steel band is B1, and the width of B2 is greater than the width of B1.B1 can be completely covered in the width range of B2
Width.In a particular embodiment, the wide B1 of steel band is 1000mm, the distance between fumarole of two sides on ammonia pipe B2
For 1100mm.Ammonia equably covers steel band to be processed, guarantees the consistent of the Nitrizing Treatment quality of whole steel band.
The ammonia jet pipe material is silicon carbide, and silicon carbide material has preferable high-temperature stability, ensure that high temperature
Under state, thermal deformation will not occur for jet pipe.The utility model uses silicon carbide material, both ensure that jet pipe will not under the condition of high temperature
Thermal deformation occurs, and can guarantee during being passed through ammonia, the stability of molecule of ammonia, ammonia will not be promoted to occur to divide
Solution, improves the nitriding efficiency of ammonia.
It in a further embodiment, is the uniformity for guaranteeing nitrogenizing effect, speed when ammonia is ejected into belt steel surface is not
It is preferably excessive, through testing, in the place apart from nitriding jet pipe 20cm, it is best with 100Pa to spray pressure.So the utility model institute
On the nitriding jet pipe being related to, pitch of holes about 50mm is sprayed, spray angle and strip operation discovery are on the contrary, about 45 degree of angle, jet pipe
Pressure at inlet is 300-500Pa, and the vertical range of spray tube center distance strip is 200mm.
The present apparatus is preferably silicon carbide material, is that one end can be passed through ammonia, the closed pipe assembling structure of the other end.Along spray
Length of tube direction is provided with fumarole, aperture 3mm according to 50mm spacing.Spray orifice edge needs the strip center line of Nitrizing Treatment symmetrical
Arrangement, for nozzle hole number depending on strip width processed, outermost spray orifice spacing is greater than the wide 1000mm of steel band.Spray orifice when installation
Outgassing direction and strip traffic direction angle are 45 °, spray the reverse strip traffic direction of gas.
It is the explanation of design to the utility model, working principle and most preferred embodiment above, which should not be construed as
Limitation to the utility model claims protection scope also belongs to this reality according to other implementations that the utility model is conceived
With novel protection scope.
Claims (10)
1. a kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment, including furnace shell, ammonia jet pipe, ammonia spray
Pipe can put in and exit furnace shell, and the direction of motion which puts in and exit is vertical with the direction of motion of steel band, the ammonia
Jet pipe be equipped with several fumaroles, it is characterised in that: the direction of motion of oblique opposite the steel band of fumarole, ammonia jet pipe center and this
The angle Wei 〆 of connection ray and vertical line between fumarole.
2. ammonia nozzle structure according to claim 1, it is characterised in that: between ammonia jet pipe center and the fumarole
The angle Wei 〆 that connection ray and vertical line are in is 30 ° to 60 °.
3. ammonia nozzle structure according to claim 1, it is characterised in that: angle Wei 〆 is 45 °.
4. ammonia nozzle structure according to claim 1, it is characterised in that: several fumaroles are arranged in a linear,
The axis parallel of the straight line and air jet pipe.
5. ammonia nozzle structure according to claim 1, it is characterised in that: the spacing between the fumarole is 40mm
To 100mm, the aperture of fumarole is 2mm to 4mm.
6. ammonia nozzle structure according to claim 5, it is characterised in that: the spacing between the fumarole is
30mm, the aperture of fumarole are 3mm.
7. ammonia nozzle structure according to claim 1, it is characterised in that: the ammonia jet pipe it is vertical with steel band away from
It is 150mm-300mm from H, the vertical range H of the ammonia jet pipe and steel band is 200mm.
8. ammonia nozzle structure according to claim 1, it is characterised in that: the fumarole of the ammonia jet pipe two sides it
Between distance be greater than the width of steel band, the width of steel band is completely covered in the range of fumarole.
9. ammonia nozzle structure according to claim 1, it is characterised in that: the ammonia jet pipe material is silicon carbide.
10. according to ammonia nozzle structure described in 1 to 9 any one of the claims, it is characterised in that: in the top of steel band
Equipped with an ammonia jet pipe, another ammonia jet pipe is equipped in the lower section of steel band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820728259.1U CN208485937U (en) | 2018-05-16 | 2018-05-16 | A kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820728259.1U CN208485937U (en) | 2018-05-16 | 2018-05-16 | A kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment |
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| Publication Number | Publication Date |
|---|---|
| CN208485937U true CN208485937U (en) | 2019-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820728259.1U Expired - Fee Related CN208485937U (en) | 2018-05-16 | 2018-05-16 | A kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment |
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| Country | Link |
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| CN (1) | CN208485937U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110499487A (en) * | 2018-05-16 | 2019-11-26 | 武汉尚瑞科技有限公司 | A kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment |
| CN112503952A (en) * | 2020-11-26 | 2021-03-16 | 东北大学 | Gas supply device in heating furnace |
-
2018
- 2018-05-16 CN CN201820728259.1U patent/CN208485937U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110499487A (en) * | 2018-05-16 | 2019-11-26 | 武汉尚瑞科技有限公司 | A kind of ammonia nozzle structure for high magnetic induction grain-oriented silicon steel Nitrizing Treatment |
| CN112503952A (en) * | 2020-11-26 | 2021-03-16 | 东北大学 | Gas supply device in heating furnace |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190212 |
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| CF01 | Termination of patent right due to non-payment of annual fee |