CN104953603A - Method of ensuring power balance for three-phase bath of submerged arc furnace and submerged arc furnace system - Google Patents
Method of ensuring power balance for three-phase bath of submerged arc furnace and submerged arc furnace system Download PDFInfo
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- CN104953603A CN104953603A CN201510318442.5A CN201510318442A CN104953603A CN 104953603 A CN104953603 A CN 104953603A CN 201510318442 A CN201510318442 A CN 201510318442A CN 104953603 A CN104953603 A CN 104953603A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000010439 graphite Substances 0.000 claims abstract description 36
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 36
- 230000007935 neutral effect Effects 0.000 claims abstract description 27
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 36
- 239000011707 mineral Substances 0.000 claims description 36
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000010891 electric arc Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Furnace Details (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
A method of ensuring power balance for a three-phase bath of a submerged arc furnace includes the steps of evenly feeding furnace charge into a hearth of a furnace body; extending three electrode groups into the heart of the furnace body, and burying the ends of the electrodes below the surface of the furnace charge; electrically connecting the three electrode groups to a three-phase outgoing end of a secondary winding of a three-phase transformer so as to provide the electrode with operating voltage in a star connection manner, and contacting the ends of the electrodes and the furnace charge so that the electrodes perform submerged arc discharge on the furnace charge around; electrically connecting a neutral point outgoing end of a secondary winding of the three-phase transformer to a graphite bottom of the furnace body so that the potential of the graphite bottom is clamped equally to that of a neutral point of the secondary winding of the three-phase transformer through a bus and so that voltage balance is ensured between the electrodes of the submerged arc furnace and the graphite bottom thereof; adjusting the positions of the three-phase electrodes in the hearth of the furnace body so as to balance three-phase current and ensure power balance of the three-phase bath of the submerged arc furnace. The invention further provides a submerged arc furnace system.
Description
Technical field
The present invention relates to mineral hot furnace metallurgical technology field, particularly relate to a kind of method and the submerged arc furnace system that ensure mineral hot furnace three-phase molten bath power-balance.
Background technology
Mineral hot furnace is a kind of highly energy-consuming equipment being used for the industrial primary product such as ferroalloy smelting class and calcium carbide, the electrode of traditional mineral hot furnace uses three groups of electrodes to be connected with the three-phase leading-out terminal of transformer secondary winding respectively, when transformer applies operating voltage to three groups of electrodes, be melted under the operating voltage that furnace charge in mineral hot furnace body of heater applies at electrode, complete reaction.
When the furnace charge reaction of mineral hot furnace, generally three-phase molten bath power is made to reach relative equilibrium by following adjustment mode: one only makes three-phase molten bath power reach relative equilibrium by manual adjustment electric current, another kind of mode is by both regulation voltage balances, regulates again the method for operation of current balance type to make three-phase molten bath power reach relative equilibrium.
But above-mentioned adjustment mode fundamentally can not solve the problem of three-phase molten bath unbalanced power: when adopting the adjustment mode only by manual adjustment electric current, univoltage often occurs energy imbalance; When adopting the adjustment mode of regulation voltage balance and current balance type simultaneously, due to be by move up and down three electrodes come regulation voltage balance and current balance type, cause and be difficult to accomplish that electric current and voltage balances simultaneously, frequent appearance is current imbalance when voltage is in a basic balance, or unbalanced phenomenon appears again in voltage when current balance type.
Summary of the invention
Be necessary to propose a kind of method ensureing mineral hot furnace three-phase molten bath power-balance.
There is a need to propose a kind of submerged arc furnace system ensureing mineral hot furnace three-phase molten bath power-balance.
Ensure a method for mineral hot furnace three-phase molten bath power-balance, comprise the following steps:
Furnace charge is evenly put into the burner hearth of body of heater;
Three groups of electrodes are stretched in the burner hearth of body of heater, and below the surface end of electrode being imbedded furnace charge, contacts with furnace charge to make electrode tip;
That three groups of electrode pairs are answered to be electrically connected with the three-phase leading-out terminal of secondary winding end that is three-phase transformer, with by Y-connection mode for electrode provides operating voltage, by the contact of electrode tip and furnace charge, make furnace charge around electrode pair carry out submerged arc electric discharge;
Bus is utilized to be electrically connected at the bottom of the neutral point leading-out terminal of three-phase transformer secondary winding and the graphite furnace of body of heater, the current potential at the bottom of graphite furnace is clamped to the current potential identical with the neutral point of the secondary winding of three-phase transformer by bus, and then ensure the balance of voltage between the electrode of mineral hot furnace and furnace bottom;
After the balance of voltage between the electrode ensureing mineral hot furnace and furnace bottom, by the balance regulating the position of three-phase electrode in the burner hearth of body of heater to realize three-phase current, and then ensure mineral hot furnace three-phase molten bath power-balance.
Ensure a method for mineral hot furnace three-phase molten bath power-balance, comprise the following steps:
Furnace charge is evenly put into the burner hearth of body of heater;
Three groups of electrodes are stretched in the burner hearth of body of heater, and below the surface end of electrode being imbedded furnace charge, contacts with furnace charge to make electrode tip;
That three groups of electrode pairs are answered to be electrically connected with the single-phase leading-out terminal of secondary winding end that is three single-phase transformers, with by Y-connection mode for electrode provides operating voltage, by the contact of electrode tip and furnace charge, make furnace charge around electrode pair carry out submerged arc electric discharge;
Bus is utilized to be electrically connected at the bottom of the neutral point leading-out terminal of the secondary winding of three single-phase transformers and the graphite furnace of body of heater, the current potential at the bottom of graphite furnace is clamped to the current potential identical with the neutral point of three single-phase transformer secondary winding by bus, and then ensure the balance of voltage between the electrode of mineral hot furnace and furnace bottom;
After the balance of voltage between the electrode ensureing mineral hot furnace and furnace bottom, by the balance regulating the position of three-phase electrode in the burner hearth of body of heater to realize three-phase current, and then ensure mineral hot furnace three-phase molten bath power-balance.
A kind of submerged arc furnace system, comprise body of heater, electrode, three-phase transformer, bus, described body of heater comprises the burner hearth be made up of furnace wall, be arranged at the bottom of the graphite furnace of burner hearth bottom, described electrode is three groups of identical electrodes, described three groups of electrodes are symmetricly set in the burner hearth of body of heater, the distance of the furnace wall of described three groups of electrode distance bodies of heater is equal, corresponding being electrically connected with described three groups of electrodes of three-phase leading-out terminal of the secondary winding end of described three-phase transformer, with by Y-connection mode for electrode provides operating voltage, the neutral point of the secondary winding end of described three-phase transformer and one end of described bus are electrically connected, the other end of described bus is connected with at the bottom of the graphite furnace of body of heater.
A kind of submerged arc furnace system, comprise body of heater, electrode, three single-phase transformers, bus, described body of heater comprises the burner hearth be made up of furnace wall, be arranged at the bottom of the graphite furnace of burner hearth bottom, described electrode is three groups of identical electrodes, described three groups of electrodes are symmetricly set in the burner hearth of body of heater, the distance of the furnace wall of described three groups of electrode distance bodies of heater is equal, what described three groups of electrode pairs were answered is electrically connected with the single-phase leading-out terminal of the secondary winding end of described three single-phase transformers, with by Y-connection mode for electrode provides operating voltage, the neutral point of the secondary winding end of described single-phase transformer and one end of described bus are electrically connected, the other end of described bus is connected with at the bottom of the graphite furnace of body of heater.
Transformer secondary winding terminal of the present invention adopts wye connection, bus is utilized the neutral point of transformer secondary winding terminal and the furnace bottom of mineral hot furnace to be linked together, the unsure state of furnace bottom is clamped to the neutral point potential of transformer secondary winding terminal by bus, the current potential of furnace bottom is made to remain zero potential, three-phase electrode like this reaches poised state relative to the voltage of furnace bottom, the secondary current of three groups of electrodes is equal all the time, then the power in three-phase molten bath also reaches balance, finally reaches low consumption, high efficiency object.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method ensureing mineral hot furnace three-phase molten bath power-balance.
Fig. 2 is the structural representation of a kind of better embodiment of submerged arc furnace system.
Fig. 3 is the structural representation of the another kind of better embodiment of submerged arc furnace system.
In figure: at the bottom of submerged arc furnace system 1, body of heater 10, furnace wall 101, burner hearth 102, graphite furnace 103, electrode 20, three-phase transformer 30, bus 50, submerged arc furnace system 1 ', body of heater 10 ', furnace wall 101 ', burner hearth 102 ', at the bottom of graphite furnace 103 ', electrode 20 ', single-phase transformer 40, bus 50 ', ensure the step S500 ~ S504 of the method for mineral hot furnace three-phase molten bath power-balance.
Embodiment
See Fig. 1, ensure that the method for mineral hot furnace three-phase molten bath power-balance comprises:
S500: burner hearth furnace charge evenly being put into body of heater.
S501: three groups of electrodes are stretched in the burner hearth of body of heater, and below the surface end of electrode being imbedded furnace charge, contact with furnace charge to make electrode tip.
S502: by three groups of electrode A, corresponding being electrically connected with three-phase leading-out terminal a2, b2, c2 of the secondary winding end of three-phase transformer 30 of B, C, with by Y-connection mode for electrode provides operating voltage, by the contact of electrode tip and furnace charge, furnace charge around electrode pair is made to carry out submerged arc electric discharge; Wherein, the voltage of three groups of electrode A, B, C is provided by the three-phase secondary winding of a three-phase transformer respectively, and in another embodiment, the voltage of three groups of electrode A, B, C is provided by three single-phase secondary winding of three single-phase transformers respectively.
S503: utilize bus to be electrically connected at the bottom of the neutral point x, y, z leading-out terminal of three-phase transformer secondary winding and the graphite furnace of body of heater, the current potential at the bottom of graphite furnace is clamped to the current potential identical with the neutral point of the secondary winding of three-phase transformer by bus, and then ensure the balance of voltage between the electrode of mineral hot furnace and furnace bottom.In other embodiments, three neutral point x ', y ', z ' of three single-phase transformers link together, bus is utilized to be electrically connected at the bottom of the neutral point leading-out terminal of the secondary winding of three single-phase transformers and the graphite furnace of body of heater, with the current potential that the neutral point of the secondary winding current potential at the bottom of graphite furnace being clamped to three single-phase transformers is identical.
S504: after the balance of voltage between the electrode ensureing mineral hot furnace and furnace bottom, by the balance regulating the position of three-phase electrode A, B, C in the burner hearth of body of heater to realize three-phase current, and then ensures mineral hot furnace three-phase molten bath power-balance.Such as can regulate current balance type by moving up and down three electrodes.
See Fig. 2, a kind of submerged arc furnace system provided by the invention, this submerged arc furnace system 1 comprises body of heater 10, electrode 20, three-phase transformer 30, bus 50, described body of heater 10 comprises the burner hearth 102 be made up of furnace wall 101, to be arranged at the bottom of the graphite furnace bottom burner hearth 102 103, described electrode 20 is three groups of identical electrodes A, B, C, described three groups of electrodes are symmetricly set in the burner hearth 102 of body of heater, described three groups of electrode A, B, the distance of the furnace wall 101 of C distance body of heater is equal, the three-phase leading-out terminal a2 of the secondary winding end of described three-phase transformer 30, b2, c2 is corresponding to described three groups of electrode A, B, C is electrically connected, with by Y-connection mode for electrode 20 provides operating voltage, the neutral point x of the secondary winding end of described three-phase transformer, y, one end of z and described bus 50 is electrically connected, the other end of described bus 50 103 to be connected with at the bottom of the graphite furnace of body of heater 10.
See Fig. 3, another kind of submerged arc furnace system provided by the invention, submerged arc furnace system 1 ' comprises body of heater 10 ', electrode 20 ', three single-phase transformers 40, bus 50 ', described body of heater 10 ' comprises the burner hearth 102 ' be made up of furnace wall 101 ', be arranged on burner hearth 102 ' bottom graphite furnace at the bottom of 103 ', described electrode 20 ' is three groups of identical electrodes A, B, C, described three groups of electrodes are symmetricly set in the burner hearth 102 ' of body of heater, described three groups of electrode A, B, the distance of the furnace wall 101 ' of C distance body of heater is equal, the leading-out terminal a2 ' of the secondary winding end of described three single-phase transformers 40, b2 ', c2 ' is corresponding to described three groups of electrode A, B, C is electrically connected, to provide operating voltage by Y-connection mode for electrode 20 ', the neutral point x ' of the secondary winding end of described three single-phase transformers 40, y ', z ' is interconnected by wire, and be electrically connected with one end of described bus 50 ', the other end of described bus 50 ' 103 ' to be connected with at the bottom of the graphite furnace of body of heater 10 '.
In the method for above-mentioned guarantee mineral hot furnace three-phase molten bath power-balance and submerged arc furnace system, three groups of electrode A of mineral hot furnace, B, when C carries out submerged arc electric discharge by the voltage that transformer secondary winding applies to furnace charge, when three groups of electrodes causing Voltage unbalance because of a variety of causes, cause secondary current also uneven, the power in the molten bath then below three groups of electrodes is also uneven, the current potential of the neutral point at the bottom of graphite furnace like this will produce drift, and then cause at the bottom of graphite furnace and three groups of electrode A, B, Voltage unbalance between C, circulation like this, make three groups of electrode A, B, voltage imbalance question between at the bottom of C and graphite furnace increases the weight of, the working of a furnace is caused to fluctuate large, technique controlling difficulty is large, unit consumption of product increases, bus is adopted to be connected with at the bottom of graphite furnace by the neutral point of transformer secondary winding by the present invention, current potential at the bottom of graphite furnace is clamped to the neutral point of transformer secondary winding, make full use of the neutral point of transformer secondary winding to control the current potential at the bottom of graphite furnace, all the time zero potential is at the bottom of graphite furnace like this, three groups of electrodes are equal all the time relative to the voltage of furnace bottom, furnace bottom current potential can not produce drifting problem, can ensure that between the electrode of mineral hot furnace and furnace bottom, voltage keeps balance, and then again by the adjustment to electric current, ensure that the power in mineral hot furnace three-phase molten bath reaches balance, finally reach low consumption, high efficiency object.
Claims (4)
1. ensure a method for mineral hot furnace three-phase molten bath power-balance, it is characterized in that: comprise the following steps:
Furnace charge is evenly put into the burner hearth of body of heater;
Three groups of electrodes are stretched in the burner hearth of body of heater, and below the surface end of electrode being imbedded furnace charge, contacts with furnace charge to make electrode tip;
That three groups of electrode pairs are answered to be electrically connected with the three-phase leading-out terminal of secondary winding end that is three-phase transformer, with by Y-connection mode for electrode provides operating voltage, by the contact of electrode tip and furnace charge, make furnace charge around electrode pair carry out submerged arc electric discharge;
Bus is utilized to be electrically connected at the bottom of the neutral point leading-out terminal of three-phase transformer secondary winding and the graphite furnace of body of heater, the current potential at the bottom of graphite furnace is clamped to the current potential identical with the neutral point of the secondary winding of three-phase transformer by bus, and then ensure the balance of voltage between the electrode of mineral hot furnace and furnace bottom;
After the balance of voltage between the electrode ensureing mineral hot furnace and furnace bottom, by the balance regulating the position of three-phase electrode in the burner hearth of body of heater to realize three-phase current, and then ensure mineral hot furnace three-phase molten bath power-balance.
2. ensure a method for mineral hot furnace three-phase molten bath power-balance, it is characterized in that: comprise the following steps:
Furnace charge is evenly put into the burner hearth of body of heater;
Three groups of electrodes are stretched in the burner hearth of body of heater, and below the surface end of electrode being imbedded furnace charge, contacts with furnace charge to make electrode tip;
That three groups of electrode pairs are answered to be electrically connected with the single-phase leading-out terminal of secondary winding end that is three single-phase transformers, with by Y-connection mode for electrode provides operating voltage, by the contact of electrode tip and furnace charge, make furnace charge around electrode pair carry out submerged arc electric discharge;
Bus is utilized to be electrically connected at the bottom of the neutral point leading-out terminal of the secondary winding of three single-phase transformers and the graphite furnace of body of heater, the current potential at the bottom of graphite furnace is clamped to the current potential identical with the neutral point of three single-phase transformer secondary winding by bus, and then ensure the balance of voltage between the electrode of mineral hot furnace and furnace bottom;
After the balance of voltage between the electrode ensureing mineral hot furnace and furnace bottom, by the balance regulating the position of three-phase electrode in the burner hearth of body of heater to realize three-phase current, and then ensure mineral hot furnace three-phase molten bath power-balance.
3. a submerged arc furnace system, it is characterized in that: comprise body of heater, electrode, three-phase transformer, bus, described body of heater comprises the burner hearth be made up of furnace wall, be arranged at the bottom of the graphite furnace of burner hearth bottom, described electrode is three groups of identical electrodes, described three groups of electrodes are symmetricly set in the burner hearth of body of heater, the distance of the furnace wall of described three groups of electrode distance bodies of heater is equal, corresponding being electrically connected with described three groups of electrodes of three-phase leading-out terminal of the secondary winding end of described three-phase transformer, with by Y-connection mode for electrode provides operating voltage, the neutral point of the secondary winding end of described three-phase transformer and one end of described bus are electrically connected, the other end of described bus is connected with at the bottom of the graphite furnace of body of heater.
4. a submerged arc furnace system, it is characterized in that: comprise body of heater, electrode, three single-phase transformers, bus, described body of heater comprises the burner hearth be made up of furnace wall, be arranged at the bottom of the graphite furnace of burner hearth bottom, described electrode is three groups of identical electrodes, described three groups of electrodes are symmetricly set in the burner hearth of body of heater, the distance of the furnace wall of described three groups of electrode distance bodies of heater is equal, what described three groups of electrode pairs were answered is electrically connected with the single-phase leading-out terminal of the secondary winding end of described three single-phase transformers, with by Y-connection mode for electrode provides operating voltage, the neutral point of the secondary winding end of described single-phase transformer and one end of described bus are electrically connected, the other end of described bus is connected with at the bottom of the graphite furnace of body of heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318442.5A CN104953603B (en) | 2015-06-11 | 2015-06-11 | Ensure the method and submerged arc furnace system of mineral hot furnace three-phase molten bath power-balance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318442.5A CN104953603B (en) | 2015-06-11 | 2015-06-11 | Ensure the method and submerged arc furnace system of mineral hot furnace three-phase molten bath power-balance |
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| Publication Number | Publication Date |
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| CN104953603A true CN104953603A (en) | 2015-09-30 |
| CN104953603B CN104953603B (en) | 2017-10-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109757003A (en) * | 2019-03-06 | 2019-05-14 | 重庆大朗冶金新材料有限公司 | Mineral hot furnace autocontrol method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3952138A (en) * | 1974-05-02 | 1976-04-20 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Power control system for electric arc or refining furnace electrically directly coupled to independent power generating unit or units |
| JP2008220140A (en) * | 2007-03-05 | 2008-09-18 | Oaks:Kk | Transformer and controller of flicker suppressing apparatus |
| CN102478602A (en) * | 2010-11-26 | 2012-05-30 | 中南大学 | Three-phase electrode power measuring method of submerged arc furnace |
| CN103529265A (en) * | 2013-09-29 | 2014-01-22 | 中南大学 | System and method for measuring electrical parameter of secondary side of submerged arc furnace |
| CN204100836U (en) * | 2014-09-17 | 2015-01-14 | 王立焕 | Rise fall of electrodes in mine hot stove monitoring circuit |
-
2015
- 2015-06-11 CN CN201510318442.5A patent/CN104953603B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3952138A (en) * | 1974-05-02 | 1976-04-20 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Power control system for electric arc or refining furnace electrically directly coupled to independent power generating unit or units |
| JP2008220140A (en) * | 2007-03-05 | 2008-09-18 | Oaks:Kk | Transformer and controller of flicker suppressing apparatus |
| CN102478602A (en) * | 2010-11-26 | 2012-05-30 | 中南大学 | Three-phase electrode power measuring method of submerged arc furnace |
| CN103529265A (en) * | 2013-09-29 | 2014-01-22 | 中南大学 | System and method for measuring electrical parameter of secondary side of submerged arc furnace |
| CN204100836U (en) * | 2014-09-17 | 2015-01-14 | 王立焕 | Rise fall of electrodes in mine hot stove monitoring circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109757003A (en) * | 2019-03-06 | 2019-05-14 | 重庆大朗冶金新材料有限公司 | Mineral hot furnace autocontrol method |
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| CN104953603B (en) | 2017-10-17 |
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