CN1063153A - A kind of arc furnace power controling method - Google Patents
A kind of arc furnace power controling method Download PDFInfo
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- CN1063153A CN1063153A CN92100609A CN92100609A CN1063153A CN 1063153 A CN1063153 A CN 1063153A CN 92100609 A CN92100609 A CN 92100609A CN 92100609 A CN92100609 A CN 92100609A CN 1063153 A CN1063153 A CN 1063153A
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- power
- voltage
- current value
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5294—General arrangement or layout of the electric melt shop
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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
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Discharge Heating (AREA)
Abstract
The invention belongs to method according to set-point control electric arc furnaces operating power.Characteristics of the present invention are at first to measure voltage, the current value of electric furnace real work, require to determine one of them exercisable voltage or current value according to smelting process again, then the computing of measured value process is drawn performance number and given performance number relatively, control electrode rises or falls to adjust the current value or the magnitude of voltage of real work when both do not wait, and makes measured power equal given performance number.Adopt control method of the present invention, because in strict accordance with the technological requirement power supply, thereby reduced unnecessary power consumption, shortened the duration of heat, reduced noise pollution.
Description
The invention belongs to method according to set-point control electric arc furnaces operating power.
Electric arc furnaces particularly make steel with electric arc furnaces at different times such as fusing, refinings promptly according to the different working of a furnaces to the given different electrical power of stove, the assurance finish smelting according to technological requirement.Because the fluctuation of line voltage, the raw material difference that is melted or smelts reasons such as (being the resistance difference) usually causes electric arc furnaces real work power to be different from given performance number.When actual power will produce overheatedly greater than set-point, increase loss and increase power consumption, when actual value during less than set-point, not reaching the smelting process requirement influences ordinary production, also increases unnecessary power consumption.Once the inventor who had designs various electric arc furnaces power governors.Disclosing a kind of " hydraulic pressure electric arc furnaces voltage adaptive adjuster " this adjuster as Chinese patent CN-85202632 belongs to electric arc furnaces power and regulates the field automatically.Its utilization voltage U cooperatively interacts to two kinds of devices that the derivative dU/dI of electric current I has distinct symbols, makes the adjuster can be without one of multi-level voltage signal that directly extracts furnace transformer and provided from electric furnace short net in ground is provided.Because should " adjuster " utilization voltage u be regulated by the derivative characteristic of electric current I, when voltage ripple of power network, promptly voltage, current value increase together when subtracting together, should " adjuster " can not play the self adaptation effect.
The present invention overcomes electric arc furnaces not according to the shortcoming of given performance number work, design a kind ofly to compare with measured value and set-point, thereby when both do not pass through the method that the adjustment rise fall of electrodes is controlled electric arc furnaces power simultaneously.
The present invention mainly realizes by following method.Magnitude of voltage, the current value of electric furnace real work are measured, and determine one of them magnitude of voltage or current value according to technological requirement, draw performance number and the comparison of given performance number by computing, when two values did not wait, the real work current value was promptly adjusted in the control electrode lifting or magnitude of voltage makes the measured power value equate with set-point.
Metallurgy industry particularly electric arc furnaces is the rich and influential family of power consumption, adopts control method of the present invention owing to reduced unnecessary power consumption in strict accordance with the technological requirement power supply, has shortened the duration of heat, promptly saves energy and reduce the cost and boosts productivity again.Reduced dry sound pollution in addition.
Control method of the present invention is in the continuous or given time interval, measured power value and given performance number are compared, when two values not simultaneously, adjust electrode and rise or fall.This given time interval is unrestricted, generally in 30 milliseconds.As 30 milliseconds, 25 milliseconds, 10 milliseconds etc.Promptly realize adjusting more at any time, accomplish that on macroscopic view actual power value and set-point are identical.
Given performance number in the control method of the present invention come to be determined by the smelting process requirement, is time dependent, and the distribution of this performance number on three electrodes be the electrical power coefficient generally can be identical.But the electric energy that actual each electrode needs is different.As three electrodes under same power condition, when melting identical furnace charge, needed asynchronism(-nization).The present invention is respectively 0.30～0.32,0.33～0.35,0.34～0.36 from the purpose of economize on electricity consumption reduction by the fusing variety classes needed time of furnace charge is compared the electrical power coefficient of determining three electrodes.
Describe in detail below in conjunction with accompanying drawing.Accompanying drawing 1 is a control method schematic diagram of the present invention.Fig. 2 is the given power level schematic diagram of electric arc furnaces, each mutually given power (under the evenly fusing situation) corresponding voltage current curve diagram of Fig. 3.(1) voltage detector in the accompanying drawings, (2) current detector, (3) smelt power given horizontal storage device, (4) arithmetic unit, (5) electrode control dress device, (6) electric arc furnaces, (7) voltage, the current data holder of each extremely given performance number correspondence, (8) electrode.
In accompanying drawing 1 the electric arc furnaces main transformer pay the limit three-phase voltage through electrode (8) to raw material starting the arc heating and melt, the magnitude of voltage of real work and current value detect and send in the arithmetic unit (4) by voltage, current detector (1) (2). Require definite power level set-point according to smelting process, deposit in as shown in Figure 2 and smelt in the power given horizontal storage device (3). Given power is W, and distributing to three power on the electrode is WPg1WPg
2WPg
3(Pg wherein1Pg
2Pg
3Be respectively the power coefficient of three electrodes). Be added in power on each electrode and the relation hyperbola as shown in Figure 3 of its electric current and voltage value. Namely on same power curve each magnitude of voltage to a current value should be arranged. The corresponding voltage of power curve, current value on determined three electrodes of each power given value deposit in the data storage (7).
When real work, according to 2 given power levels of accompanying drawing, as begin to be Wo, send in the arithmetic unit (4) by given power level holder (3). Because three electrode working conditions are identical, existing take one of them electrode as the example explanation. Voltage, current detector (1) (2) are measured magnitude of voltage U1, and current value I1, send in the arithmetic unit (4), calculate actual power U1I
1＝W
1, determine a magnitude of voltage or current value according to technological requirement this moment, as determining that magnitude of voltage is U1, be W from the given performance number of data storage (7) internal memoryoThe time, be added in power W on first electrodeopg
1Curve on find out U1Corresponding current value I is with W1With Wopg
1Compare, work as W1＞W
opg
1The time, arithmetic unit (4) sends instruction, and controller (5) makes I with the 1# electrode lifting1=I; Work as W1＜W
opg
1The time, arithmetic unit (4) sends instruction, and controller (5) descends the 1# electrode, makes I1＝I
oAt any time with W1With Wopg
1More once, adjust then one-time electrode and rise or fall, make W1＝W
opg
1 Be that every electrode actual power equals given power. The above-mentioned time interval is more little, and its actual power is more near given operating power. Consider the production actual needs, this time interval is 30 milliseconds and is advisable with interior. According to the smelting process requirement, when given performance number from WoChange to W1The time, the performance number W that holder (3) output is new1Give arithmetic unit (4), arithmetic unit (4) is found out the given power W of 1# electrode in data storage (7)1pg
1The IX that UX on the curve is corresponding, the IU value with actual measurement compares again, and when both were not inconsistent, the adjustment electrode rose or falls.
Enumerate an embodiment explanation below
As shown in Figure 2 with 5 different power given value W
0W
1W
2W
3W
4Deposit in (3), and mark three power curve (one at each electrode) totally 15 hyperbolas respectively according to the power coefficient 0.36 0.33 0.31 of these 5 set-points and three electrodes, then corresponding voltage value and current value on every hyperbola are deposited in one by one in the data storage (7) standby.Arithmetic unit (4) every 30 milliseconds from (1) (2), take out voltage, current value UI calculates performance number, determine that simultaneously the magnitude of voltage of actual measurement was exercisable voltage at that time, and then with the given performance number of the determined single electrode of power coefficient of holder (3) was given at that time performance number W and each electrode relatively, promptly when determining that but actual measurement voltage is operating voltage, in data storage, find out corresponding current value and measured current comparison; When not simultaneously, arithmetic unit (4) sends instruction notification controller (5) adjustment electrode liter or falls, and makes the measured current value equal given current value.
Claims (3)
1, a kind of arc furnace power controling method, it is characterized in that magnitude of voltage with the electric furnace real work, current value is measured, and determines one of them exercisable magnitude of voltage or current value by the smelting process requirement, draws performance number and the comparison of given performance number by internalarithmetic; When both did not wait, control electrode rose or falls to adjust real work current value or magnitude of voltage and makes measured power equal given power.
2, control method as claimed in claim 1 is characterized in that described preset time can be continuously or at interval in 30 milliseconds.
3, control method as claimed in claim 1 is characterized in that distribution coefficient or the title electrical power coefficient of given power on three electrodes is respectively 0.30～0.32,0.33～0.35,0.34～0.36.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92100609A CN1029643C (en) | 1992-02-01 | 1992-02-01 | Method for controlling the power of arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92100609A CN1029643C (en) | 1992-02-01 | 1992-02-01 | Method for controlling the power of arc furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1063153A true CN1063153A (en) | 1992-07-29 |
| CN1029643C CN1029643C (en) | 1995-08-30 |
Family
ID=4938712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92100609A Expired - Fee Related CN1029643C (en) | 1992-02-01 | 1992-02-01 | Method for controlling the power of arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029643C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428093C (en) * | 2006-06-15 | 2008-10-22 | 成都高威节能科技有限公司 | Method for aotomatic controlling rise fall of electrodes in mine hot stove |
| CN101313189B (en) * | 2005-09-20 | 2011-12-14 | 先进矿物回收技术有限公司 | Control system for an arc furnace |
| CN102478602A (en) * | 2010-11-26 | 2012-05-30 | 中南大学 | Three-phase electrode power measuring method of submerged arc furnace |
| CN102748948A (en) * | 2012-07-11 | 2012-10-24 | 张于彬 | Control method and control system for smelting process of crucible line-frequency electric induction furnace |
| CN103471412A (en) * | 2013-09-26 | 2013-12-25 | 中国恩菲工程技术有限公司 | Electrode power control method and system for electric furnace |
| CN110044186A (en) * | 2019-04-25 | 2019-07-23 | 北京中联杰能科技有限公司 | Electric arc furnace smelting control method and control system |
-
1992
- 1992-02-01 CN CN92100609A patent/CN1029643C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101313189B (en) * | 2005-09-20 | 2011-12-14 | 先进矿物回收技术有限公司 | Control system for an arc furnace |
| CN100428093C (en) * | 2006-06-15 | 2008-10-22 | 成都高威节能科技有限公司 | Method for aotomatic controlling rise fall of electrodes in mine hot stove |
| CN102478602A (en) * | 2010-11-26 | 2012-05-30 | 中南大学 | Three-phase electrode power measuring method of submerged arc furnace |
| CN102748948A (en) * | 2012-07-11 | 2012-10-24 | 张于彬 | Control method and control system for smelting process of crucible line-frequency electric induction furnace |
| CN103471412A (en) * | 2013-09-26 | 2013-12-25 | 中国恩菲工程技术有限公司 | Electrode power control method and system for electric furnace |
| CN103471412B (en) * | 2013-09-26 | 2015-04-08 | 中国恩菲工程技术有限公司 | Electrode power control method and system for electric furnace |
| CN110044186A (en) * | 2019-04-25 | 2019-07-23 | 北京中联杰能科技有限公司 | Electric arc furnace smelting control method and control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1029643C (en) | 1995-08-30 |
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