CN203550549U - Intermediate frequency furnace for fusing phosphorus pig iron - Google Patents
Intermediate frequency furnace for fusing phosphorus pig iron Download PDFInfo
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- CN203550549U CN203550549U CN201320563432.4U CN201320563432U CN203550549U CN 203550549 U CN203550549 U CN 203550549U CN 201320563432 U CN201320563432 U CN 201320563432U CN 203550549 U CN203550549 U CN 203550549U
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- intermediate frequency
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Abstract
The utility model provides an intermediate frequency furnace for fusing phosphorus pig iron. The intermediate frequency furnace for fusing phosphorus pig iron comprises a furnace body, a furnace mouth and a furnace cover, wherein a heat-preserving layer is arranged on the outer wall of the furnace body, a transition layer is arranged in the heat-preserving layer, a sinter layer is arranged in the transition layer, a meta coil is arranged outside the transition layer, and protective coating is arranged on the metal coil. According to the intermediate frequency furnace provided by the utility model, the induction coil is coated with the protective layer, so that protection is provided for the induction coil, obvious effect is provided for shortening smelting time and improving lining life, the service life of the intermediate frequency furnace is proved to be 47 days instead of 20 days, general expenses are reduced by 50% on original base, and the smelting rate is improved by 57% than before.
Description
Technical field
The utility model relates to Metal Melting technical field, is specifically related to a kind of melting phosphorus pig iron intermediate frequency furnace.
Background technology
Intermediate frequency furnace is a kind of supply unit that power frequency 50Hz alternating current is changed into intermediate frequency (300Hz is above to 1000Hz), three-phase main-frequency alternating current, after rectification, become direct current, again direct current is become to adjustable electric current of intermediate frequency, supply, by the intermediate frequency alternating current flowing through in electric capacity and induction coil, produces the highdensity magnetic line of force in induction coil, and cuts the metal material holding in induction coil, in metal material, produce very large eddy current, utilize electromagnetic induction principle heating of metal.
Intermediate frequency furnace supply frequency used is 150～10000 hertz of scopes, and its main frequency is 150～2500 hertz of scopes.Intermediate frequency furnace is a kind of special equipment that is applicable to smelt high-quality steel and alloy, compares and has the following advantages with main frequency furnace:
(1) burn-off rate is fast, and production efficiency is high.The power density of intermediate frequency furnace is large, and the power configuration of molten steel per ton is than main frequency furnace approximately large 20～30%.Therefore, the burn-off rate of intermediate frequency furnace is fast under the same conditions, and production efficiency is high.
(2) strong adaptability, is used flexibly.The every stove molten steel of intermediate frequency furnace can all go out only, changes steel grade convenient; And main frequency furnace, every stove molten steel does not allow out only, must retain a part of molten steel for starting next time, therefore changes steel grade inconvenience, is only applicable to smelt single variety steel.
(3) electromagnetic agitation effect is better.The electromagnetic force of bearing due to molten steel is to be inversely proportional to the square root of supply frequency, so the mixing power of intermediate frequency power supply is less than power frequency supply.For impurity and evening chemical composition, uniform temperature in removal steel, the mixing effect of intermediate frequency power supply is relatively good.The impulse force that stirs that power frequency supply is excessive makes molten steel increase the scouring force of furnace lining, not only reduces refining effect but also can reduce crucible life.
(4) start-up function is convenient.Because the kelvin effect of electric current of intermediate frequency is much larger than power current, so intermediate frequency furnace is when starting, and furnace charge is not had to specific (special) requirements, can rapid heat temperature raising after charging; Main frequency furnace requires the blow-on material piece (approximate with crucible size, approximately with cast steel or the casting pig of crucible mid-height) of special making could start heating, and programming rate is very slow.Therefore, under the condition of discontinuous running, mostly use intermediate frequency furnace.Another advantage that starting conveniently brings is can save electric power when discontinuous running.Due to above advantage, intermediate frequency furnace in recent years, is not only widely used for the production field of steel and alloy, and in Cast Iron Production, particularly the foundry in discontinuous running also obtains very fast development.
The complete set of equipments of intermediate frequency furnace comprises: power supply and electric control system, oven body part, transmission device and water-cooling system.Intermediate frequency furnace is as a kind of smelting equipment of metal material, and it has following characteristics:
(1) utilize electromagnetic induction principle to make furnace charge body self-heating cooking, thereby heating is fast, melting cycle is short, the thermal efficiency is high;
(2) heating energy source is clean, does not have a large amount of flame and gas to emit in heating process, pollutes littlely, has reduced the investment of environmental protection equipment;
(3) due to the development of electronic technology, make the frequency conversion equipment small volume and less weight more that becomes, easily control, be easy to the merit of fusion process, the automation of fusion process is controlled or carried out to rate;
(4) kind of conversion smelting metal material is convenient, is especially adapted to the casting unit of the many kinds of product small lot.
Intermediate frequency furnace is as recent newborn product, due to simple to operate, operating efficiency is high, be subject to liking of general smelting industry, but its overload capacity is low, troublesome maintenance, the energy and material that the consumption of intermediate frequency furnace brickwork is a large amount of, how extending intermediate frequency furnace life cycle, reduce maintenance cost, is the target that smelting industry is pursued always.
Utility model content
The purpose of this utility model is to provide a kind of melting phosphorus pig iron intermediate frequency furnace.
In order to realize above object, the utility model adopts following technical scheme:
A melting phosphorus pig iron intermediate frequency furnace, comprises body of heater, converter nose and bell, and described furnace body outer wall is provided with heat-insulation layer, is provided with transition zone in heat-insulation layer, is provided with sinter layer in transition zone, and described transition zone is provided with wire coil outward, and sinter layer and transition zone are furnace lining.
Described wire coil is provided with protective finish.
The intermediate frequency furnace that the utility model provides is coated layer protective layer on induction coil, not only induction coil is had to protective effect, and to shortening the heat, improve lining durability, also has remarkable result.
The weakness of the material maximum of furnace lining (being above-mentioned sinter layer and transition zone) is that the coefficient of expansion is higher, change in volume is high to the sensitiveness of temperature, its poor-performing that bears suddenly cold and hot, the destruction of furnace lining is often because self each several part temperature difference changes and causes compared with large or ambient temperature.Coat protective layer on wire coil after; insulation effect due to protective layer; make the temperature of furnace lining and protective layer interface can remain on 400 ℃ of left and right; with there is no coating and compare; this just greatly reduces the inside and outside temperature difference of furnace lining; the difference that has namely reduced its inside and outside change in volume, reduces the bursting stress of furnace lining, thereby extends its service life.In addition, intermediate frequency furnace is in the intermittently operated of producing, and the temperature of furnace lining is also in continuous variation, and due to the insulation effect of protective layer, the scope of this variations in temperature also can reduce so also can extend the service life of furnace lining.Intermediate frequency furnace provided by the invention, makes its life cycle bring up to 47 days by original 20 days, and general expenses reduces by 50% on original basis, and melting rate has improved 57% than in the past.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
Embodiment
A melting phosphorus pig iron intermediate frequency furnace, comprises body of heater assembly, converter nose 1 and bell 2, and described furnace body outer wall is provided with heat-insulation layer 6; in heat-insulation layer 6, be provided with transition zone 4; in transition zone 4, be provided with sinter layer 3, described transition zone 4 is outer is provided with wire coil 5, and wire coil 5 is provided with protective finish.
Claims (2)
1. a melting phosphorus pig iron intermediate frequency furnace, comprises body of heater, converter nose and bell, it is characterized in that, described furnace body outer wall is provided with heat-insulation layer, is provided with transition zone in heat-insulation layer, is provided with sinter layer in transition zone, and described transition zone is provided with wire coil outward.
2. intermediate frequency furnace according to claim 1, is characterized in that, described wire coil is provided with protective finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320563432.4U CN203550549U (en) | 2013-09-11 | 2013-09-11 | Intermediate frequency furnace for fusing phosphorus pig iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320563432.4U CN203550549U (en) | 2013-09-11 | 2013-09-11 | Intermediate frequency furnace for fusing phosphorus pig iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203550549U true CN203550549U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320563432.4U Expired - Fee Related CN203550549U (en) | 2013-09-11 | 2013-09-11 | Intermediate frequency furnace for fusing phosphorus pig iron |
Country Status (1)
| Country | Link |
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| CN (1) | CN203550549U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896940A (en) * | 2015-05-11 | 2015-09-09 | 裴柯兴 | Novel compound type furnace lining for electric induction furnace |
-
2013
- 2013-09-11 CN CN201320563432.4U patent/CN203550549U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896940A (en) * | 2015-05-11 | 2015-09-09 | 裴柯兴 | Novel compound type furnace lining for electric induction furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140416 Termination date: 20140911 |
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| EXPY | Termination of patent right or utility model |