CN204779677U - Annealing heating device that electrical sheet is adjustable - Google Patents
Annealing heating device that electrical sheet is adjustable Download PDFInfo
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- CN204779677U CN204779677U CN201520342044.2U CN201520342044U CN204779677U CN 204779677 U CN204779677 U CN 204779677U CN 201520342044 U CN201520342044 U CN 201520342044U CN 204779677 U CN204779677 U CN 204779677U
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Abstract
The utility model discloses an annealing heating device that electrical sheet is adjustable adopts the local heating of high temperature plasma, accomplishes electrician's steel band (4) recrystallization under high temperature more, and is low to the requirement of other parts in the annealing stove (1) simultaneously, realizes not having higher temperature resistant requirement to annealing stove (1), also can accomplish the more annealing of high temperature, under the condition metallurgical identical in quality of steel, obtains more to hang down the electrical sheet of iron loss. Surface quality is good simultaneously.
Description
Technical field
The utility model belongs to electrical steel treatment facility technical field, particularly relates to the adjustable annealing heating device of a kind of electrical steel.
Background technology
The large-scale continuous production of cold rolling high grade electric steel is by improving Si, Al content of steel, reduces the impurity element of steel, reasonable hot rolling and provide continuous annealing (high temperature) and realize.The high grade electric steel trade mark is higher, and iron loss is lower.Iron loss reduces, and cold rolled annealed temperature improves the means that are absolutely necessary.
The annealing of cold rolling non-oriented electrical steel realizes in continuous annealing furnace.The function of continuous annealing furnace can realize under reducing atmosphere, form by the carbon in steel that is present in of water vapour the recrystallize that carbon monoxide removes unnecessary carbon and high annealing temperature realization requirement from steel.Realize decarburization and the recrystallize of steel band, the protective atmosphere of the different piece in continuous annealing furnace is different with Heating temperature, and the atmosphere of decarbonized portion is made up of hydrogen, nitrogen and water vapour, and dew point is high, temperature is lower; The protective atmosphere of recrystallize part is made up of hydrogen, nitrogen, and dew point is low, temperature is high, and temperature annealing more than 1000 DEG C wishes to reach.
Realizing in process of the present utility model, utility model people finds that prior art at least exists following problem: electrical steel magnetic property is very responsive to internal stress, annealing process requires to ensure low internal stress, and the high-temperature part of continuous annealing furnace forbids that steel band causes steel band bending by deflector roll and forms stress for this reason.Namely cold rolling electric continuous annealing all adopts horizontal anneal, and in horizontal stove, prior art adopts supporting roll to support steel band.For preventing support roller from causing damage to steel strip surface, there is very high requirement to roll surface.Present supporting roll is adopt carbon materials (graphite) or pottery to manufacture roller shell to contact with belt steel surface substantially.
Because high-silicon electrical steel annealing needs through too high moisture, hot environment, the surface of steel is oxidized, reduce under high hydrogen atmosphere, hot conditions again, steel surface is very soft, under high temperature and deadweight condition, be very easy to the support roller surface sticking to carbon materials (graphite) or pottery manufacture, annealed band surface is badly damaged.
Heat has multiple method, and electrical steel at high temperature becomes nonferromugnetic material, and the efficiency of induction heating is very low.
Improve heating zone and soaking zone temperature, to heating unit or and associated components higher heat resistant requirements is proposed, realize also very difficult.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of employing high-temperature plasma local heating, complete electrical steel strip recrystallize at a higher temperature, simultaneously low to the requirement of other parts in annealing furnace, realize that higher heatproof requirement is not had to annealing furnace, also can complete the adjustable annealing heating device of electrical steel of the annealing of higher temperature.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of electrical steel is adjustable annealing heating device, has: annealing furnace steel band being carried out to annealing heating, also has:
The reheater be arranged in annealing furnace, steel band being reheated,
Wherein, described reheater has:
In the electrode group that steel strip surface is arranged, described electrode group comprises two electrodes, and described two electrodes are connected respectively to the two ends of power supply.
Described steel band upper surface and lower surface are respectively provided with one group of electrode group, are respectively the first electrode group and the second electrode group.
The feed tube that can spray gas is provided with between two electrodes of described electrode group.
Distance between two electrodes of described electrode group is adjustable, and the relative position of described electrode group and steel band is adjustable.
Along steel band direction of motion, be respectively equipped with heating zone and soaking zone in annealing furnace, described reheater is positioned at soaking zone near heating zone position.
Described feed tube supply be hydrogen.
The length of described electrode is greater than the width of annealing furnace, and the part that electrode stretches out outside annealing furnace is connected with power supply.
The two ends of described electrode are cylindrical, and the middle part of electrode is equilateral triangular prism shaped, and a rib of equilateral triangular prism is just to steel strip surface, and a rib of two electrodes of electrode group is relative.
Described feed tube and electrode runs parallel, feed tube is uniformly distributed porose or gap.
A technical scheme tool in technique scheme has the following advantages or beneficial effect, electrode is adopted to make hydrogen or nitrogen or argon gas etc. form high-temperature plasma, and release heat, steel band in motion is carried out to quick, the Short Time Heating of higher than conventional heating 10 ~ 150 DEG C in the cold rolled annealed stove of electrical steel, the iron loss of the cold rolled annealed electrical steel of remarkable reduction, improves magnetic property.While completing local, ultrahigh-temperature heating anneal, do not have considerable change to the requirement of annealing furnace and parts thereof, the life-span of annealing furnace and parts thereof does not affect significantly.Meanwhile, because temperature during steel band arrival support roll keeps consistent with furnace temperature substantially, reduce support roll surface and probability that is bonding and damage occurs.While obtaining the effect that higher temperature is annealed, iron loss is lower, the surface quality that annealed band can obtain.
Accompanying drawing explanation
The structural representation of electrical steel adjustable annealing heating device of Fig. 1 for providing in the utility model embodiment;
Fig. 2 is the A-A sectional view of Fig. 1;
Mark in above-mentioned figure is: 1, annealing furnace, the 2, first electrode group, the 3, second electrode group, and 4, steel band, 5, power supply, 6, feed tube; Wherein 2a, 2b, 3a, 3b are electrode.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment one
See Fig. 1, a kind of electrical steel is adjustable annealing heating device, has: the annealing furnace 1 steel band 4 being carried out to annealing heating, also has:
The reheater be arranged in annealing furnace 1, steel band 4 being reheated,
Wherein, reheater has:
As shown in Figure 2, steel band 4 surface arrange electrode group, described electrode group comprises two electrodes, described two electrodes be connected respectively to power supply 5 different output stages.In continuous annealing furnace 1, install one group of electrode, the hydrogen discharge electric arc of one group of electrifying electrodes and injection forms high-temperature plasma, and high-temperature plasma is used for the heating of steel band 4.Steel band 4 upper surface and lower surface are respectively provided with one group of electrode group, are respectively the first electrode group 2 and the second electrode group 3.
Under the galvanic action of external power 5, by the plasmarized formation electric arc of hydrogen between electrode and steel band 4, the high temperature of electric arc passes to steel band 4, and steel band 4 is heated to above furnace temperature, realizes the quick high-temp annealing of electrical steel.
The feed tube 6 that can spray gas is provided with between two electrodes of electrode group.
Distance between two electrodes of electrode group is adjustable, and the relative position of electrode group and steel band 4 is adjustable.The adjustment of the spacing of electrode can adjust the heating power density of hydrogen plasma to steel band between electrode 4, the top temperature effectively regulating the heat-up rate of steel band 4 and can reach.By changing the distance of pair of electrodes and the distance of electrode group and steel band 4 that are equipped with in the one side of electrical steel steel band 4, the power density of adjustment hydrogen heating plasma, realizes the adjustment of the rate of heating to steel band 4 and the temperature be heated to.
Steel band 4 Heating temperature can by adjustment steel band 4 travelling speed, adjust the thickness of the Distance geometry steel band 4 of distance, electrode and the steel band 4 between the electric power of hydrogen plasma input, electrode.
Along steel band 4 direction of motion, be respectively equipped with heating zone and soaking zone in annealing furnace 1, reheater is positioned at soaking zone near heating zone position.Temperature when steel band 4 arrives the support roll of soaking zone far-end keeps consistent with furnace temperature substantially, reduces support roll surface and probability that is bonding and that damage occurs.While obtaining the effect that higher temperature is annealed, iron loss is lower, the surface quality that annealed band 4 can obtain.
What feed tube 6 was supplied is hydrogen, also can be argon gas or other gas.
The length of electrode is greater than the width of annealing furnace 1, and the part that electrode stretches out outside annealing furnace 1 is connected with power supply 5.The end of electrode is stretched out outside stove.Part outside stove is to connect power supply 5.Therefore, the two ends of electrode are circular, the connection of convenient electricity.Centre is sticker type, and the edge of a knife just to steel band 4 surface, realizes electric discharge.The upper and lower surface of steel band 4 respectively configures an electrode.Electrode is with heat-resisting, electro-conductive material manufacture, such as: silicon carbide, graphite, W or Mo etc.
The two ends of electrode are cylindrical, and the middle part of electrode is equilateral triangular prism shaped, and a rib of equilateral triangular prism is just to steel band 4 surface.Three ribs are equivalent actions, and each rib can both use as the discharge portion of electrode, improve electrode life (end-of-life, with another).
Feed tube 6 and electrode runs parallel, feed tube 6 is uniformly distributed porose or gap.Hydrogen sprays from feed tube 6, and the hydrogen opening of feed tube 6, towards electrode, feed tube 6 has hole or gap the region of discharge of hydrogen injection to electrode, and the conduction of electrode discharge is the plasmarized realization relying on hydrogen.Ensure that heating completes under non-oxide (reduction) condition.
Electricity loop has two, steel band 4 upper surface one, lower surface one: upper surface electricity loop, power supply 5a → electrode 2a → hydrogen 6a → steel band 4 → hydrogen 6a → electrode 2b → power supply 5a; Lower surface electricity loop, power supply 5b → electrode 3a → hydrogen 6b → steel band 4 → hydrogen 6b → electrode 3b → power supply 5b.Due to hydrogen steel band 4 surface-discharge cause electric arc formed high temperature, steel band 4 as two poles in electric loop, that is: electricity two electrodes effect.
Embodiment two
Heating means for above-mentioned electrical steel is adjustable annealing heating device, comprise the steps:
1) steel band 4 is when entering annealing furnace 1, is heated to annealing temperature in the heating zone of annealing furnace 1;
2), when steel band 4 moves to reheater position, feed tube 6 is to electrode ejection gas, and electrode discharge makes gas plasma, produces heat and again heats steel band 4;
3) after steel band 4 leaves reheater, when leaving soaking zone, steel band 4 temperature is close to furnace temperature.
Steel band 4 temperature of reheater part is higher than furnace temperature 10 ~ 150 DEG C, and in annealing furnace 1, the temperature of heating zone and soaking zone is at 950 ~ 1100 DEG C.
Continuous annealing furnace 1 is heated to annealing temperature insulation steel band 4, and holding-zone filling shielding gas, shielding gas is made up of hydrogen and nitrogen.
Between two support roller of soaking zone, run entrance (for two support roller) near steel band 4, high-temperature plasma heating blowpipe is set.Steel band 4 leaves the plasma heating district of electrode, and temperature starts to decline, and when arriving next support roll, temperature is close to the furnace temperature of annealing regulation.As a result, electrical steel steel band 4 is annealed under higher than general annealing temperature, furnace temperature does not increase.The requirement of body of heater, furnace interior part does not improve, and the iron loss of annealing electrical steel steel band 4 reduces, magnetic property improves, surface quality improves.
The heating zone of cold rolling high-silicon electrical steel annealing furnace 1 and soaking zone heat under the nitrogen and hydrogen hybrid protection atmospheric condition of high hydrogen concentration, and the temperature of soaking zone is at 950 ~ 1100 DEG C.
High-temperature plasma heating blowpipe adopts hydrogen or nitrogen or argon gas as working medium, temperature out > 1150 DEG C.The width of high-temperature plasma heating blowpipe is at 20 ~ 200mm.Steel band 4 is heated by high-temperature plasma heating blowpipe, steel band 4 temperature is higher than furnace temperature 10 ~ 150 DEG C, steel band 4 completes high temperature re-crystallization between two support roller, outlet (for two support roller) is arrived at steel band 4, steel band 4 temperature is reduced to close to fire box temperature, makes the working temperature of support roll and annealing furnace 1 thorax low (relative to steel band 4 reality heating top temperature).
After adopting above-mentioned scheme, electrode is adopted to make hydrogen or nitrogen or argon gas etc. form high-temperature plasma, and release heat, steel band 4 in motion is carried out to quick, the Short Time Heating of higher than conventional heating 10 ~ 150 DEG C in the cold rolled annealed stove of electrical steel 1, the iron loss of the cold rolled annealed electrical steel of remarkable reduction, improves magnetic property.While completing local, ultrahigh-temperature heating anneal, do not have considerable change to the requirement of annealing furnace 1 and parts thereof, the life-span of annealing furnace 1 and parts thereof does not affect significantly.Meanwhile, because temperature when steel band 4 arrives support roll keeps consistent with furnace temperature substantially, reduce support roll surface and probability that is bonding and that damage occurs.While obtaining the effect that higher temperature is annealed, iron loss is lower, the surface quality that annealed band 4 can obtain.
Under same quality coil of strip metallurgical quality condition, annealing temperature is high, and the iron loss of electrical steel reduces.1), under same quality coil of strip metallurgical quality condition, the electrical steel of the higher trade mark (iron loss is lower) can be obtained; 2) because steel band 4 adopts localized hyperthermia to heat, make the actual annealing high temperature conventional annealing temperature of annealing electrical steel steel band 4, obtain high magnetic characteristics (low iron loss, the trade mark are higher) and the high silicon of excellent surface quality, high grade electric steel.Simultaneously because in-furnace temperature does not improve, the part requirement (heatproof, wearing and tearing and dross) run in body of heater and stove is not improved, production cost is low, product magnetic property and surface quality better.
By reference to the accompanying drawings the utility model is exemplarily described above; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present utility model is conceived and technical scheme is carried out; or design of the present utility model and technical scheme directly applied to other occasion, all within protection domain of the present utility model without to improve.
Claims (8)
1. the adjustable annealing heating device of electrical steel, has: the annealing furnace (1) steel band (4) being carried out to annealing heating, is characterized in that also having:
The reheater be arranged in annealing furnace (1), steel band (4) being reheated,
Wherein, described reheater has:
In the electrode group that steel band (4) surface is arranged, described electrode group comprises two electrodes, and described two electrodes are connected respectively to the two ends of power supply (5).
2. the adjustable annealing heating device of electrical steel as claimed in claim 1, it is characterized in that, described steel band (4) upper surface and lower surface are respectively provided with one group of electrode group, are respectively the first electrode group (2) and the second electrode group (3).
3. the adjustable annealing heating device of electrical steel as claimed in claim 1, is characterized in that, be provided with the feed tube (6) that can spray gas between two electrodes of described electrode group.
4. the adjustable annealing heating device of electrical steel as claimed in claim 3, it is characterized in that, the distance between two electrodes of described electrode group is adjustable, and the relative position of described electrode group and steel band (4) is adjustable.
5. the adjustable annealing heating device of electrical steel as claimed in claim 3, it is characterized in that, along steel band (4) direction of motion, annealing furnace is respectively equipped with heating zone and soaking zone in (1), and described reheater is positioned at soaking zone near heating zone position.
6. the adjustable annealing heating device of electrical steel as claimed in claim 5, it is characterized in that, the length of described electrode is greater than the width of annealing furnace (1), and electrode stretches out annealing furnace (1) part outward and is connected with power supply (5).
7. the adjustable annealing heating device of electrical steel as claimed in claim 6, it is characterized in that, the two ends of described electrode are cylindrical, and the middle part of electrode is equilateral triangular prism shaped, a rib of equilateral triangular prism is just to steel band (4) surface, and a rib of two electrodes of electrode group is relative.
8. the adjustable annealing heating device of electrical steel as claimed in claim 3, it is characterized in that, described feed tube (6) and electrode runs parallel, (6) are uniformly distributed porose or gap to feed tube, and what described feed tube (6) was supplied is hydrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520342044.2U CN204779677U (en) | 2015-05-25 | 2015-05-25 | Annealing heating device that electrical sheet is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520342044.2U CN204779677U (en) | 2015-05-25 | 2015-05-25 | Annealing heating device that electrical sheet is adjustable |
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| Publication Number | Publication Date |
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| CN204779677U true CN204779677U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520342044.2U Expired - Fee Related CN204779677U (en) | 2015-05-25 | 2015-05-25 | Annealing heating device that electrical sheet is adjustable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831026A (en) * | 2015-05-25 | 2015-08-12 | 马钢(集团)控股有限公司 | Adjustable electrical steel annealing and heating device and annealing and heating method thereof |
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2015
- 2015-05-25 CN CN201520342044.2U patent/CN204779677U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831026A (en) * | 2015-05-25 | 2015-08-12 | 马钢(集团)控股有限公司 | Adjustable electrical steel annealing and heating device and annealing and heating method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |