CN208455025U - A kind of fused salt electric installation - Google Patents
A kind of fused salt electric installation Download PDFInfo
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- CN208455025U CN208455025U CN201820919947.6U CN201820919947U CN208455025U CN 208455025 U CN208455025 U CN 208455025U CN 201820919947 U CN201820919947 U CN 201820919947U CN 208455025 U CN208455025 U CN 208455025U
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- fused salt
- heating
- heating furnace
- electric installation
- heated
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Abstract
The utility model discloses a kind of fused salt electric installation, described device includes that power supply, conducting wire and the electrode set on heating furnace steel band inlet and outlet, two electrodes are connected to power supply by conducting wire, and liquid fused salt is filled in heating furnace.By the present apparatus, fused salt flowing is steady, and it is uniformly and low to make contact resistance, thus keep the electric heating to electrical sheet uniform, it is last the result is that magnetic property is uniform.
Description
Technical field
The utility model belongs to the heat treatment auxiliary purification techniques field of metallurgy industry product, and in particular to a kind of fused salt is led
Electric installation.
Background technique
Modern cold rolling electric production is annealed.Existing annealing is completed using continuous annealing furnace, general annealing
It is directly heating using fuel gas buring, is then heated again with completely isolated radiant tube.Cold rolling electric continuous annealing furnace is used
Protective gas (nitrogen hydrogen mixeding gas) prevents surface oxidation, internal oxidition and the interior hair for nitrogenizing phenomenon under (reduction) hot conditions
It is raw, improve cold rolling electric performance.The protective gas maintenance positive pressure outer gas of prevention furnace enters in furnace.
The heating speed of cold rolling electric continuous annealing has a significant impact the performance of final products, and heating speed height can be with
Improve properties of product.Furthermore degree of oxidation similarly has a significant impact properties of product, this point on high grade electric steel especially
It is prominent.
In order to improve electrical sheet heating speed, Japanese Unexamined Patent Publication 5-59441 (JPH0559441A, 1993.03.09) is benefit
With the resistance of electrical steel strip, it is powered and the temperature of electrical sheet is increased to the temperature completing recrystallization and needing by resistance heating.But
It is the tie point of electrical circuit, since the movement of electrical sheet, plate shape cause the huge fluctuation of contact resistance, to make steel band can not
Soaking heating.
Equally, patent CN02814192.X- " highfield iron loss and the excellent superelevation magnetic flux of coating characteristic of nippon
Density one-way oriented electric steel plate and its manufacturing method " in order to obtain the orientation silicon steel of high magnetic strength, low iron loss, it is wanted before decarburizing annealing
Seek 100 DEG C/s of heating speed >, really 300 DEG C/s or 400 DEG C/s.The patent CN200780014827.6- of nippon
" manufacturing method of the grain-oriented magnetic steel sheet of the high magnetic flux density " and CN200780018947.3- " directionality of high magnetic flux density
The manufacturing method of electromagnetic steel plate " also require that heating speed, for quick heating requirements induction heating.
Nippon patent CN200880011115.3- " with curie point steel band continuous annealing method and
Continuous annealing apparatus " when with the heat treatment of the tools of the manufactures such as high-speed steel or mold (bulk), in order to guarantee the uniform of heating
(preventing, Reducing distortion), prevent oxidation and quickly, using salt bath heating.Since the workpiece of this heat treatment process is small, salt bath furnace
It is small in size, salt is static.Meanwhile for the dissolution of carbide in steel, heating time is long.Due to the heat treatment temperature of workpiece
Relatively high, the fusing point of same salt bath is also high.
During steel band laser heating, the temperature of steel band is related with furnace temp and the speed of service (time).Therefore steel
The impacted factor of the temperature of band is more, and fluctuation is big, and state of oxidation control is relatively difficult.
Heated at high speed in electrical sheet heat treatment process can be improved magnetic property, but since there are curie point (ferromagnetism for steel
Disappearance temperature), when improving steel band heating temperature using induction heating, the efficiency of the above induction heating of Curie-point temperature significantly drops
Low, heating speed receives restriction.And the heating speed of other methods is difficult to improve, and needs new heated at high speed method.
The salt bath heating of tool steel is carried out for small workpiece, does not adapt to (fusing point, oxidation for steel tape heating
Property, heating time, mobility etc.).The fluidized-bed of tool steel heats, and it is electric heating that is utilized, which is conductive powder,.
Cold rolling electric mostly uses continuous annealing production line at present, and annealing product thickness is thin, generally 0.50mm,
0.35mm, 0.3mm, 0.25mm, 0.2mm etc., width is generally in 1000mm~1250mm, and the speed of service is in 100m/min or more；
To realize higher heating speed, general annealed wire heating furnace front end uses scale-free heating (NOF), the side burnt using open fire
Formula heats strip, and heating speed general control is not able to satisfy product quality still into one at tens of DEG C (20~30 DEG C/s)
Improved demand is walked, belt steel surface oxidation is additionally inevitably will cause, causes the drop of strip property (especially iron loss)
It is low；And follow-on heating method is to heat (RTF) using radiant tube, but heating speed is substantially reduced (≤20 DEG C/s).Using
Both heating means unevenly can cause thermal stress because heating toward contact, influence belt plate shape.
The electric conductivity for how utilizing fused salt makes electrical steel strip electric heating realize that low contact resistance forms electrical circuit, is us
Urgent problem.
Summary of the invention
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model mentions
For a kind of fused salt electric installation, it is therefore an objective to using the electric conductivity of fused salt, make electrical sheet electric heating, realize that low contact resistance forms electricity
Circuit makes electric heating process temperature and homogeneous heating.
To achieve the goals above, the technical solution that the utility model is taken are as follows:
A kind of fused salt electric installation, described device include power supply, conducting wire and set on heating furnace steel band inlet and outlet electrode, two
Electrode is connected to power supply by conducting wire, and liquid fused salt is filled in heating furnace.
The heating furnace steel band inlet and outlet are equipped with container, and container head is equipped with opening, and bottom end is by introducing pipe and heating
Furnace connection conducting, two electrodes are inserted into respectively in two containers.
The container is the round tube or V-groove container of upper opening.
Liquid fused salt circulation conveying is entered in heating furnace by fused salt transfer pipeline, the input end of fused salt transfer pipeline is to out
Mouthful extreme direction is successively arranged fused salt preheater, the combustion heater heated for the fused salt after preheating to preheater and is used for
The electric heater that fused salt after combustion heater heating is further heated.
Fused salt after being preheated preheater by pump for liquid salts imports molten salt heater group and heats.
The utility model has the beneficial effects that fused salt flowing is steady by the present apparatus, keep contact resistance uniformly and low, from
And keep the electric heating to electrical sheet uniform, it is last the result is that magnetic property is uniform.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is the overall structure diagram that fused salt electric installation is installed in annealed wire.
In the figure, it is marked as
1, steel band, 2, heating furnace, 3, soaking pit, 4, preheater, 5, pump for liquid salts, 6, combustion heater, 7, electric heater, 8,
Nozzle, 9, electrode, 10, power supply.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to specific embodiment of the present utility model further detailed
Thin explanation, it is therefore an objective to help those skilled in the art to the design of the utility model, technical solution have it is more complete, accurate and
Deep understanding, and facilitate its implementation.
As shown in Figure 1, a kind of fused salt electric installation, which includes power supply 10, conducting wire and passes in and out set on heating furnace steel band
The electrode 9 of mouth, two electrodes 9 are connect by conducting wire with power supply 10, and liquid fused salt is filled in heating furnace 2.Pass through such structure
Setting, on electrical steel continuous annealing production line, heating is complete using the heating of electrical steel strip self-resistance, the side of liquid salt bath conduction
At the laser heating of electrical steel strip, heating.The requirement of salt bath is: entrance (room temperature) liquidus temperature low guaranteed forms complete electricity and adds
Gas barrier inside and outside hot loop and strip entrance, outlet (heating furnace) liquidus temperature height form complete electric heating circuit.Specifically
When setting, one fused salt slot of each setting is imported and exported in the steel band of heating furnace, electrode enters heating furnace after being inserted into fused salt slot, with heating
Liquid fused salt in furnace is contacted with conduction, at this point, should ensure that the liquid in heating furnace according to the conventional arrangement demand of existing heating furnace
Body fused salt will not be flowed out from fused salt slot.
For the ease of placing electrode at the steel band of heating furnace inlet and outlet both ends, heating furnace steel band inlet and outlet are equipped with container,
Container head is equipped with opening, and bottom end connect conducting with heating furnace by introducing pipe, and two electrodes are inserted into respectively in two containers.Container
Bottom face can be flushed with heating furnace top end face, after avoiding heating furnace from filling full fused salt, exported from container top end opening.Container
The preferably round tube of upper opening or V-groove container.By the present apparatus, fused salt flowing is steady, make contact resistance uniformly and
It is low, thus keep the electric heating to electrical sheet uniform, it is last the result is that magnetic property is uniform.
In order to further ensure electrical steel strip is heated to the technological temperature needed, by fused salt transfer pipeline by liquid fused salt
Circulation conveying enters in heating furnace, the input end of fused salt transfer pipeline to outlet extreme direction be successively arranged fused salt preheater 4, for pair
The combustion heater 6 and further add for the fused salt after being heated to combustion heater that fused salt after preheater preheating is heated
The electric heater 7 of heat.Fused salt after being preheated preheater by pump for liquid salts 5 imports molten salt heater group and heats, Zhi Houcong
The outlet of fused salt transfer pipeline imports the import of heating furnace.Preferably, pump for liquid salts is set between preheater and combustion heater
On conveyance conduit.
Specifically, the fused salt in heating furnace 2, by the preheating of preheater 4, (exhaust gas being discharged using heating furnace, is passed through
Heat exchanger heats the fused salt for flowing through heat exchanger for the first time, improves efficiency of energy utilization, and heating temperature is relatively low) after, quilt
Pump for liquid salts 5 is sent to the heating of combustion heater 6 (can be fired in heat exchanger using coal gas, natural gas as combustion medium
It burns, the process that fused salt passes through from heat exchanger external circuit carries out indirect heating by heat transfer, and heating temperature is needed close to technique
The temperature wanted), pass through directly heating for electric heater 7 again later, temperature of molten salt is accurately increased to the annealing of electrical sheet strip
Technological temperature is pipelined to nozzle 8, is ejected on steel band, guarantees accurately to reach technique when steel band is exported from heating furnace
Temperature accelerates the reverse flow of Steel In Reheating Furnace band and fused salt, promotes steel band preheating in heating furnace and heating effect.Fused salt
By reverse flow to steel band entrance.Steel band is heated in the process of running, and fused salt is cooled.Cold fused salt enters from steel band again
The fused salt outlet of mouth end setting is admitted to preheater, recycles above-mentioned heating process, completes the heat cycles of fused salt, realizes continuous band
The continuous quick heating of steel.
The utility model is exemplarily described in conjunction with attached drawing above.Obviously, the utility model implements not
It is limited by aforesaid way.As long as the various unsubstantialities that the method concept and technical solution that use the utility model carry out
Improvement；Or it is not improved, the above-mentioned conception and technical scheme of the utility model are directly applied into other occasions, at this
Within the protection scope of utility model.
Claims (5)
1. a kind of fused salt electric installation, which is characterized in that described device includes power supply, conducting wire and imports and exports set on heating furnace steel band
Electrode, two electrodes are connected to power supply by conducting wire, and liquid fused salt is filled in heating furnace.
2. fused salt electric installation according to claim 1, which is characterized in that the heating furnace steel band inlet and outlet are equipped with appearance
Device, container head are equipped with opening, and bottom end connect conducting with heating furnace by introducing pipe, and two electrodes are inserted into respectively in two containers.
3. fused salt electric installation according to claim 2, which is characterized in that the container is the round tube or V-type of upper opening
Tank therefor.
4. fused salt electric installation according to claim 1, which is characterized in that recycled liquid fused salt by fused salt transfer pipeline
It is conveyed into heating furnace, the input end of fused salt transfer pipeline is successively arranged fused salt preheater, for preheating to outlet extreme direction
It the fused salt combustion heater heated after device preheating and is further heated for the fused salt after being heated to combustion heater
Electric heater.
5. fused salt electric installation according to claim 4, which is characterized in that the fused salt after being preheated preheater by pump for liquid salts
Molten salt heater group is imported to be heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820919947.6U CN208455025U (en) | 2018-06-14 | 2018-06-14 | A kind of fused salt electric installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820919947.6U CN208455025U (en) | 2018-06-14 | 2018-06-14 | A kind of fused salt electric installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208455025U true CN208455025U (en) | 2019-02-01 |
Family
ID=65160914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820919947.6U Active CN208455025U (en) | 2018-06-14 | 2018-06-14 | A kind of fused salt electric installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208455025U (en) |
-
2018
- 2018-06-14 CN CN201820919947.6U patent/CN208455025U/en active Active
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