CN101328526A - Device for determining height of smelting tank when continuously feeding cast iron in arc furnace - Google Patents
Device for determining height of smelting tank when continuously feeding cast iron in arc furnace Download PDFInfo
- Publication number
- CN101328526A CN101328526A CNA2008101451648A CN200810145164A CN101328526A CN 101328526 A CN101328526 A CN 101328526A CN A2008101451648 A CNA2008101451648 A CN A2008101451648A CN 200810145164 A CN200810145164 A CN 200810145164A CN 101328526 A CN101328526 A CN 101328526A
- Authority
- CN
- China
- Prior art keywords
- furnace
- video camera
- arc furnace
- electric arc
- pig iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C21C5/527—Charging of the electric furnace
-
- 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
- C21C5/527—Charging of the electric furnace
- C21C2005/5276—Charging of the electric furnace with liquid or solid rest, e.g. pool, "sumpf"
-
- 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
- C21C2005/5288—Measuring or sampling devices
-
- 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)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention relates to a method and apparatus for determining melting bath height (5a) of successive pig iron charges in an electric-arc furnace (1) when producing steel from pig iron, wherein a bottom furnace (1a) with furnace lining (3) is filled with various voluminal pig iron (2) based on filling method and/or attrition rate, and the filling operation is implemented by an oxygen-blowing lance (4), and a spacing (6) between the oxygen-blowing lance head and the melting bath plane (5) is determined by the following method: the melting bath level (5) is determined by tilting the furnace (1) when filling, and following its return to the operating position (21a), optical measurement is employed, or the determination is made by estimating the angle of tilt (alpha), so that the melting bath height can be determined. From the determination, the spacing (6) between the oxygen-blowing lance (4) and the melt bath level is adjusted.
Description
The application be that November 11, application number in 2004 are 200410092917.5 the applying date, denomination of invention divides an application for the application for a patent for invention of " determining the method and apparatus of height of smelting tank in electric arc furnace during continuously feeding cast iron ".
Technical field
Determine the method and apparatus of melting liquid pool height when the present invention relates to when producing steel in electric arc furnace continuously feeding cast iron by the pig iron, the pig iron that the end stove that wherein has a furnace lining is loaded different volumes according to the method and/or the degree of wear of charging, and stove is operated by an oxygen air blast spray gun at least by an electrode system and in the other time period, and measures the pig iron amount of loading respectively.
Background technology
Known that there are wearing and tearing in the heat size device with furnace lining, thus in the process of hundreds of meltings the pond volume growth of end stove, and melting liquid pool plane descends.Stocking volume can not improve arbitrarily on the other hand, because the volume that changes can not enough accurately be determined.Thereby the furnace lining wearing and tearing are adjusted influential to the spacing of oxygen air blast spray gun.So general measuring cell level all.
Open (DE 3822705C2) a kind of to be used for the method for the pond level of metal pool below the measuring vessel slag layer.Here container is made of a converter.This method and device are by means of a measuring probe job, and this probe has a thermopair under a protective guard.Measuring probe is dipped into, to enter slag layer and to measure the oxygen local pressure there.Measuring result also is not used in adjusting oxygen air blast spray gun to melting pond planar spacing.
In addition, DE19836844A1 discloses a kind of method that is used for determining arc melting pond level.Wherein melting pond level is determined by the calculated relationship with linear measure, and these linear measure parts are direct, part is carried out outside the high-temperature zone of electric arc furnace indirectly.Simultaneously melting pond level is determined by the difference of the gauge length of the positional value of the electrode supporting arm that is in the working position and Graphite Electrodes length and electric arc thereof.Yet last value is also just estimated.
Summary of the invention
The objective of the invention is to, not from the electrode supporting arm of electric arc furnace, but between the lance head of trying to achieve oxygen air blast spray gun and the plane, melting pond with process relevant spacing, with at the desired spacing of regulating before the refining process between Oxygen Flow outlet and melting liquid or slag.
Above-mentioned task is so finished according to the present invention: the plane, melting pond of each time charging by the inclination of electric arc furnace and after being turned back to the working position by the opticmeasurement pitch angle or at least by estimating that the pitch angle determines, thereby definite height of smelting tank and regulate oxygen air blast spray gun to melting pond planar spacing.The invention has the advantages that enough accurate distance measurement, it depends on the melting pond level that is caused by the furnace lining wearing and tearing in the reality, there is an oxygen air blast spray gun position relevant with process in this plane, thereby and can carries out effective refining process.Reaching perhaps by the pitch angle in principle, other known electric arc furnace size can calculate the spacing of being asked.
In form of implementation of the present invention, after charging repeatedly remaining lining thickness by the furnace bottom shell on skin temperature measurement and additionally measured and considered.Can check the value of before having obtained like this.
Another program of the present invention is to position by the sign that exists on the end stove to new installation to obtain the pitch angle.To this method, do not need very high Master Cost.
Another characteristics are, one still hot after tilting, be selected as sign from melting liquid stone position that expose, that furnace lining limits.
One of them such sign can be taken by a thermal video camera.
A simple method that is used to obtain the pitch angle is with the naked eye to estimate the pitch angle by a cleanout door of opening.
The device that is used for the height of smelting tank of definite continuously feeding cast iron charging is produced the electric arc furnace of steel by the pig iron from prior art, the end stove that wherein has furnace lining is according to the method for charging and/or the pig iron of degree of wear filling different volumes, and this electric arc furnace has an electrode system and has a liftable oxygen air blast spray gun and a lifting guide arrangement at least in the other time period, and oxygen air blast spray gun can be adjusted to spacing relevant with method of melting pond planar.
The so design of this device makes on tiltable electric arc furnace, temporarily sets up an optical connection line between Optical devices and one and the cleanout door of the opening sign that roughly straight line is relative when cleanout door is opened.Thereby realize relevant given advantage with method.
In addition, the suggestion sign is made of a stone position predetermined, that limit of furnace lining.
In addition, Optical devices are made of a thermal video camera (by a so-called heat eye).
Another kind of recommendation on improvement, the mark post of embedding metal between the stone position, these mark posts are connected with the furnace bottom shell by ground terminal.Each mark post has constituted a measurement point that is used for the optics connection line.
A kind of improvement is that mark post is connected metering facility electronics, conduction that is used to produce measurement signal.
A kind of be used to regulate the self-operated measuring unit that the motor of oxygen air blast spray gun to melting pond planar spacing be connected and so realize: form the metering circuit that constitutes by thermal video camera or video camera, a plurality of mark posts, a temperature analysis device that is used for a plurality of measuring positions on the end stove furnace bottom shell.
At last, thermal video camera can be made of infrared camera.
Description of drawings
Embodiments of the invention shown in the accompanying drawing describe the present invention in detail by them below.
In the accompanying drawing:
Fig. 1 illustrate the electric arc furnace that is in the working position-mainly be end stove-a section, wherein shown electric arc furnace pitch angle is about 10 °,
Fig. 2 A is the cut-away section that passes furnace lining in the end stove,
Fig. 2 B is the view that is subordinated to Fig. 2 A,
Fig. 3 A is the view of the stove of inclination facing to furnace lining,
Fig. 3 B is the partial view that is subordinated to Fig. 3 B, and it has heating curve, and
Fig. 4 the furnace bottom skin temperature is shown and the wearing and tearing that cause by the melting number of times between graph of relation.
Embodiment
In the electric arc furnace (Fig. 1) of the end stove 1a with furnace lining, be provided with a device that when producing steel, is used for the height of smelting tank 5a on definite plane, melting pond 5 by the pig iron 2, the end stove 1a that wherein has furnace lining 3 loads the pig iron 2 (different pig iron amount 2a) of different volumes according to the loading method and/or the degree of wear, and electric arc furnace 1 has an electrode system (not shown), and having a liftable oxygen air blast spray gun 4 and a lifting guide arrangement (not shown) at least in the other time period, oxygen air blast spray gun 4 is adjusted to a spacing relevant with method 6 on plane, melting pond 5.
In order to try to achieve inclined angle alpha, plane, melting pond 5 (if consider slag, obtaining height of smelting tank 5a) changes its position with this pitch angle on furnace lining 3, heat furnace lining 3 like this, makes that sign occurs with different forms when revolution.For example heated stone can have with not by slag or the different tempering color of melting liquid wetted stone.Here when opening, cleanout door 12 temporarily setting up an optical connection line 13 on the tiltable electric arc furnace 1 between Optical devices 10 and one and the cleanout door of the opening sign 8 that roughly straight line is relative.Furnace lining 3 is made up of a wear washer 3a and a durable liner 3b.Sign 8 can constitute stone position 9 predetermined by of furnace lining 3, that limit.Optical devices 10 for example are made of thermal video camera 10a, video camera 10b or infrared camera 10c.
As shown in the figure, in order to regulate the spacing 6 of oxygen air blast spray gun 4 automatically, embed the mark post 14 of metal between the stone position 9 of the furnace lining 3 that faces toward cleanout door 12, they form with furnace bottom shell 1b by ground terminal 15 and are connected.
Mark post 14 is connected on the metering facility 16 electronics, conduction, and this equipment produces measurement signal 17, and this signal is handled motor according to calculating, and the spacing 6 of oxygen air blast spray gun 4 is carried out lift adjustment.
The metering circuit 18 that has current source 18a in addition is by thermal video camera 10a, and the temperature analysis device 19 that video camera 10b, 14, one on a plurality of mark posts are used for a plurality of measuring positions 20 on the furnace bottom shell 1b of end stove 1a constitutes.Different temperature T (referring to Fig. 4) appears in 20 places in the measuring position when lining thickness 7 reduces, and wherein for example the thickness 7 of furnace lining 3 reduces from 1200mm.Correspondingly temperature T is from T
0Rise to T
1, and provide the correlative value of the inclined angle alpha that arrives with opticmeasurement, thus be used to calculate height of smelting tank 5a.
Below by Fig. 2 A, 2B, 3A and 3B describe the method for determining height of smelting tank 5a in detail.
The plane 5, melting pond of each charging tilts to an obliquity 21 by electric arc furnace 1 and is turned back to working position 21a shown in Figure 1 again, thereby plane, melting pond 5 stays sign 8.Wherein inclined angle alpha is carried out opticmeasurement or carry out at least inclined angle alpha being estimated the pitch angle can calculate height of smelting tank 5a thus, and finish the adjusting of oxygen air blast spray gun 4 thus to the spacing 6 on plane, melting pond 5.
Constantly to increase value that (referring to Fig. 4) try to achieve can be by the outside temperature T that measures 20 places, measuring position on the furnace bottom shell 1b controlled and take in along with the melting number of times on the remaining lining thickness 7.
Inclined angle alpha positions by the sign 8 that is selected on the end stove 1a that newly provides and tries to achieve.According to Fig. 2 A, 2B, 3A and 3B, this sign 8 is the stone position 9 still heat, that expose from melting liquid after tilting, that furnace lining 3 limits, or metal mark post 14 recited above.
The simple method of asking inclined angle alpha be with the naked eye 11 on optics connection line 13 to indicating that 8 position.
Supposed obliquity 21 (end stove 1a that represents with long and short dash line among Fig. 1) among Fig. 3 A and the 3B.Wherein slag surface 22 can be between the 1st and the 2nd stone position 9, and molten refining liquid surface 23 is between the 3rd and the 4th stone position 9.The temperature variation of being regulated is represented by temperature curve 24.
Reference numerals list
1 electric arc furnaces
Stove at the bottom of the 1a
1b furnace bottom shell
2 pig iron
2a pig iron amount
3 furnace linings
The 3a wear washer
The durable liner of 3b
4 oxygen air blast spray guns
Plane, 5 melting pond
The 5a height of smelting tank
The α pitch angle
6 spacings
7 lining thicknesses
The T outside temperature
8 signs
9 stone positions
10 Optical devices
The 10a thermal video camera
The 10b video camera
The 10c infrared camera
11 naked eyes
12 cleanout doors of opening
13 optics connection lines
14 metal mark posts
15 ground terminals
16 metering facilitys
17 measurement signals
18 metering circuits
The 18a current source
19 temperature analysis devices
20 measuring positions
21 obliquities
The 21a working position
22 slag surfaces
23 melting liquid surfaces
24 temperature curves.
Claims (8)
1. determine the device of height of smelting tank (5a) when being used for when making steel at an electric arc furnace (1) continuously feeding cast iron by the pig iron (2), the pig iron (2) that the end stove (1a) that wherein has a furnace lining (3) is loaded different volumes according to the method and/or the degree of wear of charging, electric arc furnace (1) has an electrode system, and have a liftable oxygen air blast spray gun (4) and a lifting guide arrangement at least in the other time period, and oxygen air blast spray gun (4) is adjusted to a spacing relevant with method (6) of melting fluid level (5), it is characterized in that, on tiltable electric arc furnace (1), temporarily between Optical devices (10) and a sign (8) relative, set up an optics connection line (13) when opening with the cleanout door of opening (12) straight line at cleanout door (12).
2. device as claimed in claim 1 is characterized in that, sign (8) is made of a stone position (9) predetermined, that limit of furnace lining (3).
3. device as claimed in claim 1 is characterized in that, Optical devices (10) are made of a thermal video camera (10a).
4. device as claimed in claim 2 is characterized in that, embeds the mark post (14) of metal between stone position (9), and they are connected with furnace bottom shell (1b) by ground terminal (15).
5. device as claimed in claim 4 is characterized in that, mark post (14) is connected to a metering facility (16) electronics, conduction that is used to produce measurement signal (17).
6. as each described device in the claim 1 to 3, it is characterized in that, also comprise metering circuit (18), its temperature analysis device (19) by a plurality of measuring positions (20) on thermal video camera (10a) or video camera (10b), a plurality of mark post (14), the furnace bottom shell (1b) that is used for end stove (1a) constitutes.
7. device as claimed in claim 3 is characterized in that, thermal video camera (10a) is made of infrared camera (10c).
8. device as claimed in claim 6 is characterized in that, thermal video camera (10a) is made of infrared camera (10c).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10352628A DE10352628A1 (en) | 2003-11-11 | 2003-11-11 | Determining melt bath level of successive pig iron charges in electric arc furnace producing steel, tilts furnace and returns it to operating position, to take measurements |
| DE10352628.5 | 2003-11-11 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004100929175A Division CN1619244B (en) | 2003-11-11 | 2004-11-11 | Method for determining height of smelting tank when continuously feeding cast iron in arc furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101328526A true CN101328526A (en) | 2008-12-24 |
| CN101328526B CN101328526B (en) | 2010-12-08 |
Family
ID=34608926
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101451648A Expired - Fee Related CN101328526B (en) | 2003-11-11 | 2004-11-11 | Device for determining height of smelting tank when continuously feeding cast iron in arc furnace |
| CN2004100929175A Expired - Fee Related CN1619244B (en) | 2003-11-11 | 2004-11-11 | Method for determining height of smelting tank when continuously feeding cast iron in arc furnace |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004100929175A Expired - Fee Related CN1619244B (en) | 2003-11-11 | 2004-11-11 | Method for determining height of smelting tank when continuously feeding cast iron in arc furnace |
Country Status (4)
| Country | Link |
|---|---|
| CN (2) | CN101328526B (en) |
| DE (1) | DE10352628A1 (en) |
| RU (1) | RU2004132765A (en) |
| ZA (1) | ZA200409010B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9760265B2 (en) | 2011-11-25 | 2017-09-12 | Sony Corporation | Information processing device and an information processing method |
| CN108775811A (en) * | 2018-07-13 | 2018-11-09 | 陈露 | A kind of small-sized pump case casting smelting furnace |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITUD20060277A1 (en) † | 2006-12-27 | 2008-06-28 | Danieli Off Mecc | DEVICE AND METHOD FOR MEASURING THE TEMPERATURE OF LIQUID METAL IN AN ELECTRIC OVEN |
| DE102009052778A1 (en) | 2009-11-11 | 2011-05-12 | Sms Siemag Ag | Determination of the bath level in metallurgical vessels |
| DE102011089524A1 (en) | 2011-05-23 | 2012-11-29 | Sms Siemag Ag | Method and device for determining the level height of a medium in metallurgical vessels |
| CN102680536B (en) * | 2012-06-11 | 2013-10-09 | 西北工业大学 | Vacuum self-electricity-consumption arc furnace molten drop test method based on a silicon-controlled power supply |
| CN104729304B (en) * | 2015-03-23 | 2016-08-24 | 凉山矿业股份有限公司 | The real-time calibration method of top blow smelting stove Burners Positions |
| DE102016118726A1 (en) * | 2016-10-04 | 2018-04-05 | Endress+Hauser Conducta Gmbh+Co. Kg | Method for level determination |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2703697A1 (en) * | 1977-01-29 | 1978-08-03 | Krupp Gmbh | Measuring cartridge lowered into melt, esp. molten steel - thermocouple controlling immersion depth of cartridge |
| US4600047A (en) * | 1984-03-29 | 1986-07-15 | Sumitomo Metal Industries, Ltd. | Process for controlling the molten metal level in continuous thin slab casting |
| NL8800491A (en) * | 1988-02-26 | 1989-09-18 | Hoogovens Groep Bv | METHOD FOR MEASURING THE LEVEL OF A METAL BATH |
| DE3822705A1 (en) * | 1988-07-05 | 1990-01-11 | Thyssen Stahl Ag | Method for the measurement of the bath level of a metal bath in a container |
| JPH04316979A (en) * | 1991-04-17 | 1992-11-09 | Daido Steel Co Ltd | Tapping amount control method of tilting furnace |
| CN2184196Y (en) * | 1992-12-25 | 1994-11-30 | 孙虹光 | Inspection mechanism of automatic liquid level display |
| CN2180979Y (en) * | 1993-08-27 | 1994-10-26 | 增益资讯股份有限公司 | Industrial section-free type digital liquid level checker |
| NO300745B1 (en) * | 1995-05-02 | 1997-07-14 | Ind Informasjonsteknologi As | Method for determining the amount of liquid metal in casting furnaces |
| DE19836684A1 (en) * | 1998-08-13 | 2000-02-17 | Hoechst Schering Agrevo Gmbh | Use of a synergistic herbicidal combination including a glufosinate- or glyphosate-type, imidazolinone or protoporphyrinogen oxidase to control weeds in rice |
| DE10207395B4 (en) * | 2002-02-21 | 2005-02-10 | Sms Demag Ag | A method and apparatus for determining the instantaneous liquid metal bath level in a metallurgical vessel |
| JP4316979B2 (en) * | 2003-10-20 | 2009-08-19 | シャープ株式会社 | Liquid crystal display device and method for assembling liquid crystal display device |
-
2003
- 2003-11-11 DE DE10352628A patent/DE10352628A1/en not_active Ceased
-
2004
- 2004-11-08 ZA ZA200409010A patent/ZA200409010B/en unknown
- 2004-11-11 CN CN2008101451648A patent/CN101328526B/en not_active Expired - Fee Related
- 2004-11-11 CN CN2004100929175A patent/CN1619244B/en not_active Expired - Fee Related
- 2004-11-11 RU RU2004132765/02A patent/RU2004132765A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9760265B2 (en) | 2011-11-25 | 2017-09-12 | Sony Corporation | Information processing device and an information processing method |
| CN108775811A (en) * | 2018-07-13 | 2018-11-09 | 陈露 | A kind of small-sized pump case casting smelting furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA200409010B (en) | 2005-05-09 |
| DE10352628A1 (en) | 2005-06-23 |
| CN101328526B (en) | 2010-12-08 |
| RU2004132765A (en) | 2006-05-10 |
| CN1619244A (en) | 2005-05-25 |
| CN1619244B (en) | 2010-05-12 |
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Granted publication date: 20101208 Termination date: 20121111 |