CN200967827Y - Equipment for carrying out revolving furnace smelting method - Google Patents
Equipment for carrying out revolving furnace smelting method Download PDFInfo
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- CN200967827Y CN200967827Y CN 200620093802 CN200620093802U CN200967827Y CN 200967827 Y CN200967827 Y CN 200967827Y CN 200620093802 CN200620093802 CN 200620093802 CN 200620093802 U CN200620093802 U CN 200620093802U CN 200967827 Y CN200967827 Y CN 200967827Y
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- convertor
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- smelting method
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Abstract
The utility model belongs to the field of smelting of ferrous metal and non-ferrous metal and production of ferroalloy, in particular relates to an equipment required for execution of melting methods of a convertor. The utility model makes use of the space magnetic field of the convertor formed by solenoid coils arranged in the convertor. A fundamental power supply provided for the solenoid coils supplies direct current. Before electric current is fed into the solenoid coils, the solenoid coils shall be premodulated so that fusant inside the convertor moves from peripheral hems towards the center. An electromagnetic field, a supplemental magnetic force vector direction of which is opposite to that of the updraft of the convertor, is formed by making use of contact electrodes on top of the convertor. The equipment provided by the utility model comprises a convertor (1) equipped with a fireproof inner liner, an oxygen spraying lance (3) arranged in the convertor, solenoid coils (5) arranged in the inner liner of the convertor, the DC power supply part, and a modulation signal generation part. The utility model can increase total level of quality exchange inside the convertor, reduce quantity of dust carried by flue gas, improve yield of liquid steel and fusant temperature.
Description
Technical field
The utility model belongs to the smelting and the iron alloy production field of ferrous metal, non-ferrous metal, relates in particular to a kind of enforcement converter smelting method required equipment field.
Background technology
Ao Guer arranges husband A.N., Ge Liesi A.B. steel continuous casting---Nie moors Peter Luo Fusike: system process, 2002.---675 pages---(documents 1) have disclosed and utilized electromagnetic field that metal in the crystallizer tank is carried out axial stirring method in continuous casting, the purpose of this method is the quick katabatic drainage that containment tundish jet is introduced.For the problem of bath movement in the needs reinforcement converter, the shortcoming of this method is: the bath movement that adopts this method to cause is opposite with the bath movement direction that the winding-up air-flow causes.The motion that causes of winding-up air-flow, according to Ya Woyisiji B.N. steel production process theory---M.: metallurgy, the saying of 1967---792 pages---(documents 2) is: " the converter periphery is upwelling, and its central space is a katabatic drainage ".In other words.The melt flow that the melt flow that the winding-up air-flow causes and this electromagnetic stirring method cause is cancelled out each other, and can not provide required melt to stir.And one of underlying condition of converter process is carried out in required this melt stirring exactly smoothly.In addition, also bigger for implementing the required electric power of this method.
With regard to technology essence and the effect that reaches, Ukraine patent NO32562, C21C5/28, C21C5/42, the converter smelting method of 2001 (method and apparatus original shapes)---document (3) is the most approaching.The external magnetic field that it causes, the movement of metallic that forms under the directivity of magneticinduction vector are not axial motions, but the annular turning motion.According to the achievement in research of document (3), thereby can promoting to reduce splash, this motion reduces the molten iron consumption, improve the specific absorption of oxygen and the life-span of increase refractory materials.But other problem anxious to be solved (improves the molten steel output capacity in the converter production for solving, improve the temperature and the reduction of melt and take dust quantity), the shortcoming of this method is: it does not influence the bath movement of vertical direction, the bath movement that comprises the vertical direction in the converter molten pool peripheral space, and this point is extremely important, because place, close furnace wall is weakened greatly by the speed of the convective motion that the winding-up air-flow causes, make at the stirring action at these positions very littlely, this is to various physics---and the process of chemistry produces adverse influence.Because a large portion melt is arranged is ostracised substantially at various mass transfers---outside the heat transfer process.
Second shortcoming of aforesaid method (and the method that also has document (1)) is: be the alternating current that power unit produced that causes magnetic field to use, or be the industrial frequency electric current, or be low-frequency current, but all be the constant electric current of frequency values.This situation meets the magnetodynamics principle fully, because direct current does not generally cause the magnetic field that can cause bath movement.Yet for the problem that proposes is produced in converter, utilize the stable particularly alternating-current of frequency stabilization of specification, effect is can be not very good.This is because the magnetic field of causing in this case, with the natural magnetic field of converter be nonsynchronous---studies show that, even under situation without any the external force effect, the electronics that produces in the high-temperature zone has formed directed moving under the effect of winding-up air-flow, thereby the formation electric current has also just formed magnetic field naturally.
The utility model content
The utility model is intended to overcome the deficiencies in the prior art part, and a kind of mass exchange aggregate level in the converter of strengthening is provided, and reduces the enforcement converter smelting method required equipment that converter gas is taken dust quantity, improved molten steel output capacity and melt temperature.
The purpose of this utility model is achieved in that a kind of enforcement converter smelting method required equipment, and it comprises: be furnished with refractory lining converter, place the spray oxygen-blowing gun in the converter, the magnetic plug that is arranged in the converter refractory lining, direct supply part, modulation signal generation part; The input terminus of magnetic plug takes place to send into after part is modulated in the direct current signal that described direct supply is partly exported through modulation signal.
As a kind of preferred version, modulation signal generating unit branch described in the utility model comprises: signal generator, dc rectifier and modulator thereof; The signal that described signal generator sends sends into dc rectifier and modulator carries out rectification modulation.
As another kind of preferred version, the maximum height of metal pool when the height of magnetic plug described in the utility model equals oxygen blowing.
As the third preferred version, the utility model can be furnished with contacts electrode on the top of converter.
As the 4th kind of preferred version, the going up a circle most with magnetic plug and join of contacts electrode described in the utility model.Described signal generator can adopt Γ 3-34 signal generator.
As can be seen from the test results, when adopting the utility model, three indexs being studied all improve significantly.Finally, the variation of these indexs can guarantee to improve greatly ecological condition, and this is owing to reduced the dust amount of separating out.Reduced the iron water amount of charging in addition, increased the steel scrap amount, reduced the energy consumption of converter fusion process, thereby reduced steel-making cost.
The raising of melt temperature has been got rid of additional blowing and has been taked the necessity of other measure, metal quality is descended and increases the material consumption and replenish blowing and other measure meeting.Reduce the dust amount of separating out, when having improved the salable product output capacity, also improved personnel's working conditions, saved the expense of dust removal installation.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.Protection domain of the present utility model not only is confined to the statement of following content.
Fig. 1 is the utility model environment division one-piece construction synoptic diagram.
Embodiment
As shown in Figure 1, implement the converter smelting method required equipment and comprise converter 1, have the refractory lining 2 of thermal insulation layer and working lining, go up and insert winding-up rifle 3, signal generator 9, the direct supply that links to each other with dc rectifier and modulator 6 usefulness leads thereof.Amperometer 7 is arranged, voltmeter 8, step-down transformer 10, the contacts electrode 4 in the converter furnace throat in circuit.Dc rectifier and modulator 6 thereof are may command bridge rectifier circuits, in order to solve other electric problem (such as in welding technique), are made up of thyristor usually.The work of silicon-controlled rectifier is achieved by means of the signal that comes automatic signal generator 9.The power supply device is made up of three elements, that is: step-down transformer 10, dc rectifier and modulator 6 thereof and signal generator 9.
As signal generator 9 be a standardized audio freqyency oscillator, model is Γ 3-34 or the close person of performance with it.Step-down transformer 10 is standardized buck current mutual inductors, and model is В Д y-1500, is used for the strength of current of 1000～1500A.The maximum height of metal pool when the height of described magnetic plug 5 equals oxygen blowing.Is furnished with contacts electrode 4 on the top of converter 1.The going up a circle most with magnetic plug and join of described contacts electrode 4.Described signal generator 9 adopts Γ 3-34 signal generator.
The utility model is to utilize galvanic current to cause magnetic field as base current in converter 1 space.But before it being fed to the magnetic plug 5 that can form magnetic field, to carry out premodulation, make the direction of motion of giving melt in the converter 1 with consistent to the proper motion of central authorities' (axial space) from converter 1 periphery.In addition,---the ore (also can add ferrous material---ferrous materials of iron scale or 20 kilograms of/ton steel---the ball ore deposit of 40 kilograms of/ton steel according to actual needs) that in converter 1 fusion process, adds the ferrous material of 1 kilogram of/ton steel again.In fusion process these materials being added to purpose in the converter is in order to improve the specific conductivity of slag, and this can improve the condition of electromagnetic action and improve the efficient of electromagnetic action in solving all problems of this patent.
Known apparatus for melting metal comprises that is built a converter of mending in fire-resistant, a winding-up rifle, the AC power that is connected with spiral shell sense pipeline circle with lead.Coil is made curl, places converter lining, inserts height and slag one metal emulsion place height suitable (document 3).This device structure can't resolve the problem that the utility model proposes.This at first is because adopted the constant alternating current of current parameters, and the parameter of the electric current that forms when its parameter and oxygen blowing is inharmonious, and this has just seriously weakened stirring action, especially at the peripheral position of converter.In addition, vectorial orientation and converter radius are responded in the same way in the magnetic field that this equipment causes, and this provides the rotatablely move direction of melt with respect to the converter axis.At this moment, the direction of the molten bath proper motion that produces under the effect of winding-up air-flow and the travel direction of adding that cause in magnetic field do not match.Such technical solution helps to solve a series of problems, but can't reach the target that the utility model proposes.
Be the problem that solution the utility model proposes, suggestion is that the power supply device of direct current is that a kind of equipment is made on the basis to produce initial current, and direct current is delivered on the magnetic plug 5 through overmodulation after the output of power supply device again.In known equipment the height of magnetic plug should with the total height of converter molten pool (molten metal---add slag liquid) quite.This position all is known to the converter of any capacity.But these data are just for the melt (not pulling foamy) of resting state, thereby be inadequate, because do not comprise all scenario that melt moves, therefore, equipment according to this principle is made has only applied influence to the sub-fraction melt basically.Solve the problem of this patent, in aforesaid device, magnetic plug 5 is placed on the height suitable with the whole time course steel-smelting furnace of oxygen blowing maximum height (time of high water).
In the related equipment of the application, the modulation rectification device has been installed after basic direct supply, be connected on the magnetic plug 5.Simultaneously, the height that coil distributes, the height at metal pool place is limited during with oxygen blowing.In addition, on converter top contacts electrode 4 is installed, is made itself and magnetic plug realize being electrically connected, the 2nd utmost point of power supply device is then done ground connection connection.
This contacts electrode 4 is installed, and is very necessary for form its magnetic force vector direction electromagnetic field of adding relative with the converter upstream on converter 1 top.This solution has caused and has reached the required top condition of minimum power consumption when adopting this method, also helps giving metal pool from the direction of motion of converter periphery to its center.
The mode of operation of aforesaid device is as follows: at the furnace charge of packing into to converter 1, inject molten iron and it be lifted to the working position after, blow with spraying 3 pairs of molten baths of oxygen-blowing gun.From the beginning oxygen supply promptly connect power supply in a flash, then electric current is modulated, coordinate feeding current on the magnetic plug 5 after the modulation mutually with the bath movement direction that Oxygen Flow causes with the motion that guarantees the molten bath.Electric current causes an external magnetic field during by foregoing circuit, and it and liquid melts interact, and give melt with axial motion, comprise the axial motion at peripheral position.
A series of tests in the converter of 1.5t laboratory, have been finished, so as to checking the work of this method, electric installation and whole device.
Pre-buried five circle magnetic plugs in the converter lining of 1.5t laboratory, its height is suitable with the elevation position of when blowing steel-smelting furnace.
One Graphite Electrodes 4 is installed in the converter furnace throat, with lead Graphite Electrodes 4 and magnetic plug 5 is gone up a linkage most and connect.The 2nd utmost point of power supply device is connected (ground connection connection) with lead with the metal pillar.
In being preheated to 1000～1200 ℃ of converters, inject 1300～1350 ℃ molten iron, the chemical constitution following (weight %) of molten iron before handling: carbon---4～4.5; Silicon---0.8～0.9; Manganese---0.6～0.7; Sulphur---0.05～0.06; Phosphorus---0.1～0.12; Iron---surplus.Blow by 3 pairs of converter 1 molten baths of spray oxygen-blowing gun, oxygen flow is about 6.0 cubic metres/min.At the beginning of blowing, 60 kilograms of lime have been added.After the carbon amount reaches prescribed value in temperature and the metal, stopped blowing.It is 10～100W/kg (metal to be treated) that the electrician leads.
The concrete chemistry of above-mentioned molten iron (weight %) composed as follows:
(1) (two) (three)
C 4； C 4.5； C 4.3
Si 0.8； Si 0.9； Si 0.85
Mn 0.6； Mn 0.7 Mn 0.65
S 0.05； S 0.06 S 0.055
P 0.1； P 0.12 P 0.115
The Fe surplus.The Fe surplus.The Fe surplus.
Moment in oxygen supply is promptly connected the power supply device, and at this moment electric current at first enters modulator, arrives magnetic plug then.Test-results is introduced following table.
| Testing program | Steel scrap share (%) | Temperature (%) during final turndown for the first time | Molten steel output capacity (%) | The average dust content of heat (%) |
| Prior art | 7 | 1650 | 96.0~96.5 | 35.0~40.0 |
| 10 | 1600 | 95.5~96.0 | 40.0~46.0 | |
| The utility model | 7 | 1700 | 97.0~97.5 | 7.0~12.0 |
| 10 | 1645 | 96.2~97.3 | 8.0~15.0 |
Protection domain of the present utility model will not only be confined to above-mentioned embodiment; any with direct current as fundamental power supply; after converting galvanic current to modulating current; form the external magnetic field and act on melt in the converter in converter, making it is that the technical scheme of core idea all should be regarded as and falls within the protection domain of the present utility model by periphery to the center position motion.
Claims (6)
1, a kind of enforcement converter smelting method required equipment, it is characterized in that, comprising: be furnished with refractory lining (2) converter (1), place the spray oxygen-blowing gun (3) in the converter (1), the magnetic plug (5) that is arranged in converter refractory lining (2), direct supply part, modulation signal generation part; The input terminus of magnetic plug (5) takes place to send into after part is modulated in the direct current signal that described direct supply is partly exported through modulation signal.
2, enforcement converter smelting method required equipment according to claim 1 is characterized in that: described modulation signal generating unit branch comprises: signal generator (9), dc rectifier and modulator (6) thereof; The signal that described signal generator (9) sends sends into dc rectifier and modulator (6) carries out rectification modulation.
3, enforcement converter smelting method required equipment according to claim 1 and 2 is characterized in that: the maximum height of metal pool when the height of described magnetic plug (5) equals oxygen blowing.
4, enforcement converter smelting method required equipment according to claim 3 is characterized in that: be furnished with contacts electrode (4) on the top of converter (1).
5, enforcement converter smelting method required equipment according to claim 4 is characterized in that: the going up a circle most with magnetic plug and join of described contacts electrode (4).
6, enforcement converter smelting method required equipment according to claim 2 is characterized in that: described signal generator (9) adopts Γ 3-34 signal generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620093802 CN200967827Y (en) | 2006-10-26 | 2006-10-26 | Equipment for carrying out revolving furnace smelting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620093802 CN200967827Y (en) | 2006-10-26 | 2006-10-26 | Equipment for carrying out revolving furnace smelting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200967827Y true CN200967827Y (en) | 2007-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620093802 Expired - Lifetime CN200967827Y (en) | 2006-10-26 | 2006-10-26 | Equipment for carrying out revolving furnace smelting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200967827Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050478B (en) * | 2006-10-26 | 2010-07-14 | 刘东业 | Melting method of converter, and facility for implementing the method |
| CN103075883A (en) * | 2012-05-31 | 2013-05-01 | 辽宁新发展耐火材料集团有限公司 | Efficient energy-saving full-automatic electric magnesium melting revolving furnace |
-
2006
- 2006-10-26 CN CN 200620093802 patent/CN200967827Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050478B (en) * | 2006-10-26 | 2010-07-14 | 刘东业 | Melting method of converter, and facility for implementing the method |
| CN103075883A (en) * | 2012-05-31 | 2013-05-01 | 辽宁新发展耐火材料集团有限公司 | Efficient energy-saving full-automatic electric magnesium melting revolving furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: YINGKOU DSMK TECHNOLOGY DEVELOPMENT CO., LTD. Assignor: Liu Dongye Contract record no.: 2012210000018 Denomination of utility model: Equipment for carrying out revolving furnace smelting method Granted publication date: 20071031 License type: Exclusive License Record date: 20120301 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20071031 |
|
| EXPY | Termination of patent right or utility model |