CN1757758A - Rotary furnace steelmaking process and end point control system - Google Patents
Rotary furnace steelmaking process and end point control system Download PDFInfo
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- CN1757758A CN1757758A CN 200510123304 CN200510123304A CN1757758A CN 1757758 A CN1757758 A CN 1757758A CN 200510123304 CN200510123304 CN 200510123304 CN 200510123304 A CN200510123304 A CN 200510123304A CN 1757758 A CN1757758 A CN 1757758A
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Abstract
A control system for controlling the steel smelting procedure and the stopping point of converter is composed of the stage-one and-two filters, in-line laser gas analyzer installed to the fume pipeline between said two filters, the fume temp detector installed at end of high-temp flue, the fume flowmeter installed to the cold pipeline behind filter, and computer. Its control method includes such steps as acquiring the components in fume, fume temp, fume flow and other information, inputting them to computer, calculating decarbonating speed, the removed carbon percentage, variation curve, carbon content in molten steel and the temp of molten steel, feeding them back to control computer, and conducting control.
Description
Technical field:
The invention belongs to field of steel-making, relate generally to the control of converter steelmaking process and terminal point.
Technical background:
Along with steel industry is increasingly competitive both at home and abroad, need accurately control to enhance productivity, to reduce production costs converter steelmaking process.Converter is realized that dynamically the measure of the comparative maturity of control mainly contains both at home and abroad at present: sublance method, analysis of fumes method etc.
The sublance method is to insert the method for temperature and carbon sensor when bessemerizing near terminal point in stove by machinery, directly measures liquid steel temperature and carbon content.The advantage of this method is more directly to obtain converter molten steel carbon temperature information, shortcoming is the molten steel information that can only obtain a certain moment, can not obtain the continuous message in the converting process, control lacks the continuous message source to the converter process operation for this, because installation site and detection cost limit, the sublance method is mainly used in mammoth conveter simultaneously.
Analysis of fumes method converter control techniques has begun to be applied in the converter control at present.The technology that analysis of fumes converter control is adopted has following several mode:
(1) mass spectrometer method.This method is by from converter flue temperature end continuous drawing flue gas sample gas, sends into and analyzes in the mass spectrometer by filtration, purification, processings such as dewater, and the result of acquisition is imported in the converter control computer realization into to the temperature control of converter carbon.This method advantage is to analyze the multiple gases composition simultaneously, shortcoming is the cost of investment height, and failure rate is than higher (the easy scaling loss of sampling probe, sampling line and strainer easily stops up, switching solenoid valve is fragile or the like) big, the overall delay time of maintenance capacity long (generally reaching 15S to 20S) in the treating processes.Companies such as VAI, Da Nieli all adopt this technology at present.
(2) application of laser analyzer in converter gas detects at present.Occurring on the pipeline of converter blower fan side, adopting laser gas analyzer to analyze CO, CO in the flue gas aspect the RECOVERY OF CONVERTER GAS
2, be used for monitoring and control RECOVERY OF CONVERTER GAS quality.Because distance is distant, the information of measurement point generally more than 30 seconds, can't be used for converter control than the time-delay of converter real-time condition.The Converter Oxigen Blowing time, generally about 10 to 15 minutes, reaction in furnace is very fierce for the big production of converter, to require detection information to feed back to control computer as quickly as possible rapidly, and the simultaneous faults rate is little reliable with information, thereby can satisfy converter control requirement better.
Technology contents:
The object of the present invention is to provide a convertor steelmaking process and the terminal point Controlling System that cover less investment, failure rate are low, the message delay time is short.
The present invention adopts the analysis of fumes method that convertor steelmaking process and terminal point are controlled, the present invention is directly installed on a formula laser gas analyzer on the flue between converter one civilian fly-ash separator and the two civilian fly-ash separators, and pyrometer is installed and online flue gas flow meter is installed on the cold segment pipe after the dedusting at converter high-temperature flue end, thereby obtain to comprise smoke components, smoke comprehensive information such as temperature end flue-gas temperature and flue gas flow, this category information enters computer and converter out of Memory (raw material, auxiliary material, information such as oxygen blast) combine together and realize control converter process and terminal point.
Now in conjunction with the accompanying drawings the present invention is elaborated
Accompanying drawing 1 is the synoptic diagram of convertor steelmaking process of the present invention and terminal point Controlling System.
Among the figure, 1 is converter, and 2 is that feeding device, 3 is the oxygen rifle, 4 is bottom blowing system (for combined blown converter), and 5 is the flue preboiler, and 6 is a civilian fly-ash separator, 7 is two civilian fly-ash separators, and 8 is flue, and 9 is the flue gas flow meter, 10 is online laser analyzer, 11 is the high-temperature flue-gas meter, and 12 is programmable logic controller, 13 converter computer Controlling System, 14 is the transmitter unit of laser gas analyzer, and 15 is the receiving element of laser gas analyzer.
Find out that by accompanying drawing 1 convertor steelmaking process of the present invention and terminal point Controlling System detect meter 11, flue gas flow detection meter 9, programmable logic controller 12 and converter computer Controlling System 13 by laser gas analyzer 10, flue-gas temperature and form; Laser gas analyzer 10 is placed on the flue pipeline 8 between converter 1 one civilian fly-ash separators 6 and the two civilian fly-ash separators 7, the transmitter unit 14 and the receiving element 15 of laser gas analyzer directly are installed on the both sides of flue 8, flue-gas temperature detects meter 11 and is installed in the flue temperature end 5 of converter 1, and flue gas flow detects meter 9 and is installed in the low-temperature end 8 of converter flue; Laser gas analyzer 10, flue-gas temperature detect meter 11, breathing gas flow detects meter 9 and links to each other with programmable logic controller 12 respectively, programmable logic controller 12 directly links to each other with converter computer Controlling System 13, and programmable logic controller 12 also links to each other with feeding device 2, oxygen rifle 3, the bottom blowing system 4 of converter respectively.
Attenuation degree is taken place with receiving element 15 detection laser beam energies by the flue gas molecular absorption in the transmitter unit 14 by laser gas analyzer 10, measures CO, CO in the flue gas
2Concentration; In order to improve control accuracy and effect, and detect meter 11 by flue-gas temperature respectively and flue gas flow detects temperature and the flow that meter 9 is measured flue gases, with CO, CO in the flue gas
2Concentration and the temperature of flue gas and flow information by programmable logic controller 12, enter converter computer Controlling System 13, form converter reaction product smoke comprehensive information, converter computer Controlling System 13 calculates thus bessemerizes the process decarbonization rate, decarburized amount, the reactions change curve, carbon content in the molten steel during in the process with near terminal point, and the raw material (molten iron that adds in conjunction with converter, steel scrap, the pig iron), auxiliary material, blowing oxygen quantity, the working of a furnace and molten bath are stirred information calculations and are gone out liquid steel temperature in the blowing, directly feed back in converter computer Controlling System 13 by online calculation result, realize the control of lance position of production process, oxygen blast control, reinforced slag making control, prevent the slag splash and return dried control, blow end point is proposed rifle control and bottom blowing control, thereby reach convertor steelmaking process and terminal point is implemented control.
Compared with prior art, the present invention has following advantage:
1. this control system has been eliminated in temperature end because Dust Capacity is big needs to adopt bypass insertion sampling to visit Head extraction furnace gas carries out filtration, purification and processes problems such as bringing the fault rate height. The present invention is with laser gas analysis Instrument is placed near the flue pipeline between converter one civilian dedusting and the two civilian dust arresters. In this position Have the converter of utilization one literary composition or two civilian dedusters converter gas overwhelming majority dust is removed, thereby do not need Employing bypass type flue gas air extractor extracts analyzes sample gas, has simplified the device of system, has greatly reduced to be The probability that system breaks down.
2. transmitter unit and the receiving element with laser gas analyzer directly is installed on two of flue On the side, direct-on-line is measured the flue composition of gases near converter, greatly improves the whole system cigarette Gas information detection speed. Producing furnace gas in converter arrives through petticoat pipe, preboiler pipeline, a civilian dedusting The time that reaches analysis site is 3-4 in second, and laser gas analysis speed is in 1 second, when data transmit Between less than 1 second, be less than 5-6 second thereby postpone total time. Adopt mass spectrography to be general time delay 15-20 is more than second. Therefore, present technique more can reflect the reaction in furnace situation fast, improves the converter control effect Really, have an enormous advantage at tool aspect the FEEDBACK CONTROL speed.
Claims (1)
1. convertor steelmaking process and terminal point Controlling System is characterized in that
1. this system is made up of laser gas analyzer (10), flue-gas temperature detection meter (11), flue gas flow detection meter (9), programmable logic controller (12) and converter computer Controlling System (13); Laser gas analyzer (10) is placed on the flue pipeline (8) between a civilian fly-ash separator (6) and the two civilian fly-ash separators (7), the transmitter unit of laser gas analyzer (14) directly is installed on the both sides of flue (8) with receiving element (15), flue-gas temperature detects meter (11) and is installed in the flue temperature end (5) of converter (1), and flue gas flow detects meter (9) and is installed in the low-temperature end (8) of converter flue; Laser gas analyzer (10), flue-gas temperature detect meter (11), breathing gas flow detects meter (9) and links to each other with programmable logic controller (12) respectively, programmable logic controller (12) directly links to each other with converter computer Controlling System (13), programmable logic controller (12) also links to each other with feeding device (2), oxygen rifle (3), the bottom blowing system (4) of converter respectively
2. attenuation degree is taken place with the direct detection laser beam energy of receiving element (15) by the flue gas molecular absorption in the transmitter unit (14) by laser gas analyzer (10), measures CO, CO in the flue gas
2Concentration; And detect temperature and the flow of counting (11) and flue gas flow detection meter (9) mensuration flue gas by flue-gas temperature respectively, with CO, CO in the flue gas
2Concentration and the temperature and the flow information of flue gas, enter converter computer Controlling System (13) by programmable logic controller (12), form converter reaction product smoke comprehensive information;
3. converter computer Controlling System (13) is according to CO, CO in the flue gas
2The composition integrated information, calculate in the decarbonization rate, decarburized amount, reactions change curve, process of the process of bessemerizing and carbon content in the molten steel during near terminal point, and information calculations such as the raw material (molten iron, steel scrap, the pig iron) that adds in conjunction with converter, auxiliary material, blowing oxygen quantity, the working of a furnace, molten bath stirring go out liquid steel temperature in the blowing;
4. directly feed back in the converter control computer by online calculation result, realize production process control of lance position, oxygen blast control, reinforced slag making control, prevent the slag splash with return do control, blow end point is proposed rifle control, bottom blowing control (for combined blown converter) etc., thereby reach convertor steelmaking process and terminal point are implemented to control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101233048A CN1316044C (en) | 2005-11-17 | 2005-11-17 | Rotary furnace steelmaking process and end point control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101233048A CN1316044C (en) | 2005-11-17 | 2005-11-17 | Rotary furnace steelmaking process and end point control system |
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| CN1757758A true CN1757758A (en) | 2006-04-12 |
| CN1316044C CN1316044C (en) | 2007-05-16 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463407B (en) * | 2008-11-22 | 2011-02-02 | 大连理工大学 | Method for calculating converter steel melting lime adding amount |
| CN102344986A (en) * | 2011-11-11 | 2012-02-08 | 田陆 | Method, device and system for controlling steel-making endpoint of converter |
| CN102363825A (en) * | 2011-11-11 | 2012-02-29 | 田陆 | Method, device and system for controlling furnace conditions of convertor steelmaking |
| CN102382937A (en) * | 2011-08-15 | 2012-03-21 | 北京科技大学 | Electric arc furnace smelting process control method based on furnace gas analysis |
| CN102424884A (en) * | 2011-10-19 | 2012-04-25 | 北京金自天正智能控制股份有限公司 | Lifting control system for oxygen gun accident and control method for oxygen gun accident |
| CN102791399A (en) * | 2010-02-26 | 2012-11-21 | 特诺恩古德菲洛公司 | System for furnace slopping prediction and lance optimization |
| CN103388042A (en) * | 2013-07-23 | 2013-11-13 | 山东莱钢永锋钢铁有限公司 | Carbon monoxide lance position operation method for converter blowing |
| CN103842526A (en) * | 2011-09-28 | 2014-06-04 | 西门子Vai金属科技有限责任公司 | Method and device for influencing the genesis of reaction gases in a metallurgic vessel |
| CN104109729A (en) * | 2014-07-31 | 2014-10-22 | 武钢集团昆明钢铁股份有限公司 | Steelmaking process control system and method |
| CN107012286A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | Method for monitoring smelting parameters of converter |
| CN108424992A (en) * | 2017-02-15 | 2018-08-21 | 宝钢工程技术集团有限公司 | The sublance device of oxygen rifle and the setting of sublance homonymy |
| CN111868268A (en) * | 2018-03-19 | 2020-10-30 | 杰富意钢铁株式会社 | Molten metal component estimation device, molten metal component estimation method, and molten metal production method |
| CN111944944A (en) * | 2020-06-30 | 2020-11-17 | 西安西矿环保科技有限公司 | Coal gas recycling maximization control method and system of converter coal gas fan |
| CN112522469A (en) * | 2020-12-01 | 2021-03-19 | 福建三宝钢铁有限公司 | Converter smelting process of HRB400cE corrosion-resistant steel |
| CN113388712A (en) * | 2021-06-15 | 2021-09-14 | 马鞍山钢铁股份有限公司 | Low-carbon LF (ladle furnace) process steel converter smelting method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1992008088A1 (en) * | 1990-10-30 | 1992-05-14 | The Broken Hill Proprietary Company Limited | Distance measurement in furnaces |
| WO2002001190A2 (en) * | 2000-06-26 | 2002-01-03 | Murray Thomson | Method and apparatus for improved process control in combustion applications |
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| CN101463407B (en) * | 2008-11-22 | 2011-02-02 | 大连理工大学 | Method for calculating converter steel melting lime adding amount |
| CN102791399A (en) * | 2010-02-26 | 2012-11-21 | 特诺恩古德菲洛公司 | System for furnace slopping prediction and lance optimization |
| CN102382937B (en) * | 2011-08-15 | 2013-08-28 | 北京科技大学 | Electric arc furnace smelting process control method based on furnace gas analysis |
| CN102382937A (en) * | 2011-08-15 | 2012-03-21 | 北京科技大学 | Electric arc furnace smelting process control method based on furnace gas analysis |
| CN103842526A (en) * | 2011-09-28 | 2014-06-04 | 西门子Vai金属科技有限责任公司 | Method and device for influencing the genesis of reaction gases in a metallurgic vessel |
| CN103842526B (en) * | 2011-09-28 | 2015-11-25 | 西门子Vai金属科技有限责任公司 | For affecting the method and apparatus of generation in the container of metallurgy, reactant gases |
| CN102424884A (en) * | 2011-10-19 | 2012-04-25 | 北京金自天正智能控制股份有限公司 | Lifting control system for oxygen gun accident and control method for oxygen gun accident |
| CN102424884B (en) * | 2011-10-19 | 2013-06-12 | 北京金自天正智能控制股份有限公司 | Lifting control system for oxygen gun accident and control method for oxygen gun accident |
| CN102363825B (en) * | 2011-11-11 | 2014-04-02 | 田陆 | Method, device and system for controlling furnace conditions of convertor steelmaking |
| CN102344986B (en) * | 2011-11-11 | 2014-12-03 | 田陆 | Method, device and system for controlling steel-making endpoint of converter |
| CN102344986A (en) * | 2011-11-11 | 2012-02-08 | 田陆 | Method, device and system for controlling steel-making endpoint of converter |
| CN102363825A (en) * | 2011-11-11 | 2012-02-29 | 田陆 | Method, device and system for controlling furnace conditions of convertor steelmaking |
| CN103388042B (en) * | 2013-07-23 | 2016-05-11 | 山东莱钢永锋钢铁有限公司 | Bessemerize carbon monoxide rifle bit manipulation method |
| CN103388042A (en) * | 2013-07-23 | 2013-11-13 | 山东莱钢永锋钢铁有限公司 | Carbon monoxide lance position operation method for converter blowing |
| CN104109729A (en) * | 2014-07-31 | 2014-10-22 | 武钢集团昆明钢铁股份有限公司 | Steelmaking process control system and method |
| CN104109729B (en) * | 2014-07-31 | 2016-03-09 | 武钢集团昆明钢铁股份有限公司 | A kind of process for making control system and method |
| CN107012286A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | Method for monitoring smelting parameters of converter |
| CN108424992A (en) * | 2017-02-15 | 2018-08-21 | 宝钢工程技术集团有限公司 | The sublance device of oxygen rifle and the setting of sublance homonymy |
| CN111868268A (en) * | 2018-03-19 | 2020-10-30 | 杰富意钢铁株式会社 | Molten metal component estimation device, molten metal component estimation method, and molten metal production method |
| CN111944944A (en) * | 2020-06-30 | 2020-11-17 | 西安西矿环保科技有限公司 | Coal gas recycling maximization control method and system of converter coal gas fan |
| CN112522469A (en) * | 2020-12-01 | 2021-03-19 | 福建三宝钢铁有限公司 | Converter smelting process of HRB400cE corrosion-resistant steel |
| CN112522469B (en) * | 2020-12-01 | 2022-08-05 | 福建三宝钢铁有限公司 | Converter smelting process of HRB400cE corrosion-resistant steel |
| CN113388712A (en) * | 2021-06-15 | 2021-09-14 | 马鞍山钢铁股份有限公司 | Low-carbon LF (ladle furnace) process steel converter smelting method |
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Application publication date: 20060412 Assignee: Jiangsu Changqiang Iron & Steel Co., Ltd. Assignor: Central Iron & Steel Research Institute Contract record no.: 2013320000265 Denomination of invention: Rotary furnace steelmaking process and end point control system Granted publication date: 20070516 License type: Exclusive License Record date: 20130326 |
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