CN1316044C - 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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- CN1316044C CN1316044C CNB2005101233048A CN200510123304A CN1316044C CN 1316044 C CN1316044 C CN 1316044C CN B2005101233048 A CNB2005101233048 A CN B2005101233048A CN 200510123304 A CN200510123304 A CN 200510123304A CN 1316044 C CN1316044 C CN 1316044C
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Abstract
The present invention belongs to the technical field of steel making, which mainly relates to a control system for a rotary furnace steelmaking process and an end point. The present invention adopts a furnace gas analyzing method, an on-position type laser gas analyzer is installed on a flue gas pipeline between a primary dust remover and a secondary dust remover of a rotary furnace whose the high-temperature flue end is provided with a flue gas temperature testing meter, a flue gas flow testing meter is installed on a cold section pipeline after the dust removal is carried out, and therefore, comprehensive information comprising the ingredients, the temperature and the flow of the flue gas is acquired; the information enters a computer to be combined with other kinds of information of the rotary furnace so that the decarbonizing speed, the decarbonizing quantity, the reaction changing curve and the carbon content in molten steel when process neutralization approaches to an end point are calculated, and the information is combined with the information of raw materials and auxiliary materials added in the rotary furnace, oxygen blowing quantity, furnace conditions, melting bath stirring, etc. so that the temperature of the molten steel in converting is calculated; the results are directly fed back to the control computer of the rotary furnace, and then the gun position control of an oxygen gun in the production process, the oxygen blowing control, slagging control, the gun lifting control of the converting end point, bottom blowing control and the control of the rotary furnace steelmaking process and the end point are realized.
Description
Technical field
The invention belongs to field of steel-making, relate generally to the control of converter steelmaking process and terminal point.
Background technology
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
Embodiment
Description of drawings
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, and 13 is the 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 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 preboiler 5 of converter 1, and flue gas flow detects meter 9 and is installed in two civilian fly-ash separators 7 flue afterwards; Laser gas analyzer 10, flue-gas temperature detect meter 11, flue gas flow detects meter 9 and links to each other with programmable logic controller 12 respectively, programmable logic controller 12 is directly controlled 13 systems with converter computer and is linked to each other, 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.
By the transmitter unit 14 and the attenuation degree that receiving element 15 detection laser beam energies are taken place by the flue gas molecular absorption of laser gas analyzer 10, measure 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 information that stir in the working of a furnace and molten bath, calculate 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 on the flue between converter one civilian deduster and the two civilian dust catcher devices. Has profit in this position With converter one civilian deduster or two civilian dedusters converter gas overwhelming majority dust is removed, thereby do not needed 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. the both sides that transmitter unit and the receiving element of laser gas analyzer directly are installed on flue On, direct-on-line is measured near the converter flue composition of gases within, greatly improves the inspection of whole system flue gas information Degree of testing the speed. The furnace gas that produces in converter arrives and analyzes through petticoat pipe, preboiler pipeline, a civilian dedusting The time of point is 3-4 in second, and laser gas analysis speed is in 1 second, and data transfer time is less than 1 Second, be less than 5-6 second thereby postpone total time. Adopting mass spectrography general time delay is 15-20 second More than. Therefore, present technique more can reflect the reaction in furnace situation fast, improves the converter control effect, instead Feedback control rate aspect tool has an enormous advantage.
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 (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 preboiler (5) of converter (1), and flue gas flow detects meter (9) and is installed in two civilian fly-ash separators (7) flue afterwards; Laser gas analyzer (10), flue-gas temperature detect meter (11), flue 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;
2. by the transmitter unit (14) and the attenuation degree that the direct detection laser beam energy of receiving element (15) is taken place by the flue gas molecular absorption of laser gas analyzer (10), measure 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, calculate liquid steel temperature in the blowing in conjunction with the information that stir in raw material, auxiliary material, blowing oxygen quantity, the working of a furnace, molten bath that converter adds;
4. directly feed back in converter computer Controlling System (13) by online calculation result, the control of lance position of realization production process, oxygen blast control, reinforced slag making are controlled, prevent the slag splash and are returned dried control, blow end point proposes rifle control and bottom blowing is controlled, thereby reach convertor steelmaking process and terminal point enforcement are controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 CN1757758A (en) | 2006-04-12 |
| CN1316044C true CN1316044C (en) | 2007-05-16 |
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| CNB2005101233048A Active CN1316044C (en) | 2005-11-17 | 2005-11-17 | Rotary furnace steelmaking process and end point control system |
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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 |
| MX2012009815A (en) * | 2010-02-26 | 2012-09-12 | Tenova Goodfellow Inc | 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 |
| AT511806B1 (en) * | 2011-09-28 | 2013-03-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR INFLUENCING THE GENERATION OF REACTION GASES IN A METALLURGICAL VESSEL |
| 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 |
| CN102344986B (en) * | 2011-11-11 | 2014-12-03 | 田陆 | Method, device and system for controlling steel-making endpoint of converter |
| CN102363825B (en) * | 2011-11-11 | 2014-04-02 | 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 |
| 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 | A kind of converter smelting parameter monitoring method |
| 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 |
| KR102348892B1 (en) * | 2018-03-19 | 2022-01-07 | 제이에프이 스틸 가부시키가이샤 | Molten metal component estimation apparatus, molten metal component estimation method, and molten metal manufacturing 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 |
| 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 |
| CN113388712B (en) * | 2021-06-15 | 2022-04-05 | 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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| WO1992008088A1 (en) * | 1990-10-30 | 1992-05-14 | The Broken Hill Proprietary Company Limited | Distance measurement in furnaces |
| US20040191712A1 (en) * | 2000-06-26 | 2004-09-30 | Thomson Murray J. | Method and apparatus for improved process control in combustion applications |
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|---|---|---|---|---|
| WO1992008088A1 (en) * | 1990-10-30 | 1992-05-14 | The Broken Hill Proprietary Company Limited | Distance measurement in furnaces |
| US20040191712A1 (en) * | 2000-06-26 | 2004-09-30 | Thomson Murray J. | Method and apparatus for improved process control in combustion applications |
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| CN1757758A (en) | 2006-04-12 |
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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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