CN103255261B - Converter tapping hole sliding gate slag-stopping process - Google Patents
Converter tapping hole sliding gate slag-stopping process Download PDFInfo
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- CN103255261B CN103255261B CN201210034093.0A CN201210034093A CN103255261B CN 103255261 B CN103255261 B CN 103255261B CN 201210034093 A CN201210034093 A CN 201210034093A CN 103255261 B CN103255261 B CN 103255261B
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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
Abstract
The invention discloses a converter tapping hole sliding gate slag-stopping process. The process comprises the following steps that: (1) a hydraulic station is started when a tapping start signal is received; (2) the converter starts to tilt, and a tilting angle signal is sent to a PLC on a real-time basis, and when the converter tilting angle reaches a first critical value, the PLC controls the close of a slag-stopping gate valve; (3) when the converter tilting angle reaches a second critical value, the PLC controls the opening of the slag-stopping gate valve; (4) when tapping molten steel is close to the end and slagging begins, the PLC immediately controls close of the slag-stopping gate valve if the following conditions are satisfied simultaneously: a. the PLC detects a slagging signal sent by an infrared slagging detection system aligning at the tapping molten steel to the PLC; b. the converter tilting angle is no less than 85DEG; and c. the tapping time is no less than 3min; (5) after tapping, the converter is reset, and when the PLC detects that the converter is returned to the starting position, the PLC controls opening of the slag-stopping gate valve; and (6) hydraulic station is closed.
Description
Technical field
The present invention relates to metal liquid spout Controlling Technology, particularly relate to a kind of tap hole slide gate nozzle Slag Retaining Process.
Background technology
In convertor steelmaking process, when molten steel complete tap after smelting time, molten steel goes out in ladle through converter taphole.Converter slag due to its proportion less and float on molten steel face than molten steel, therefore when tapping, converter slag can prior to molten steel through tap hole slag in ladle; In addition, go out molten steel close at the end of, if not in time close tap hole, converter slag also can from tap hole slag to ladle.Have high oxidative due to converter slag and contain a large amount of objectionable impuritiess, converter slag goes out not only affects steel quality in ladle, and can increase the processing cost of subsequent handling.Therefore, in order to prevent the slag of converter slag when tapping, converter current steel-making have employed technique and the technology of the slag of various control converter tapping, such as slag-blocking ball, slag blocking dart, pneumatic dreg blocking etc.
Document number is US6197086, publication date is March 6 calendar year 2001, and the american documentation literature that name is called " SYSTEM AND METHOD FOR MINIMIZING SLAG CARRYOVER DURING THE PRODUCTION OF STEEL " discloses a kind of method that slag detects.
Document number is JP2006124737, and publication date is on May 18th, 2006, and the Japanese documentation that name is called " SLAG STOPPING TOOL AND ITS USING METHOD " discloses a kind of technique adopting slag-blocking ball pushing off the slag.
Publication number is CN1962885, and publication date is on May 16th, 2007, and the Chinese patent literature that name is called " a kind of air curtain skimming device for converter steelmaking " discloses a kind of air-flow control slag technique.
Document number is US4634106, and publication date is on January 6th, 1987, and the american documentation literature that name is called " DEVICE FOR PLACING SLAG RETENTION MEANS IN TAPPING CONVERTER " discloses a kind of Slag Stopping Technology by Skimming Dart technology.
But all there is certain problem in these methods:
(1) these methods all cannot control to the converter slag in ladle through tap hole slag prior to molten steel during tapping;
(2) level of automation of these methods is lower, can not associate with existing automatic detection slag system, therefore cannot go out molten steel close at the end of, effectively carry out sentencing slag and pushing off the slag;
(3) the pushing off the slag success ratio of these methods is not high, and pushing off the slag effect can not meet process for making demand completely.
At present, the development trend of Converter Skimming technology wishes can seek one in tapping early, middle, late stage whole process, all can carry out the method for pushing off the slag quickly and efficiently.Converter taphole slide plate method pushing off the slag technology is a kind of technology of being carried out pushing off the slag by switch slide plate, due to its slide plate opening and closing speed quickly, about about 0.5s, therefore converter taphole slide plate method can stop effectively to the pre-slag in tapping process and later stage slag, and can be combined with PLC control technology by AMEPA (infrared Lower proterozoic group system), thus realize automatically sentencing slag and pushing off the slag.Converter taphole slide plate method is a kind of production technology of converter current tapping pushing off the slag best results.Following Chinese patent literature all relates to slide gate nozzle Slag Retaining Process technology:
Publication number is CN201046973, and publication date is on April 16th, 2008, and the Chinese patent literature that name is called " revolving furnace tap hole sliding gate valve apparatus " discloses a kind of revolving furnace tap hole sliding gate valve apparatus;
Publication number is CN201501898U, and publication date is on June 9th, 2010, and the Chinese patent literature that name is called " a kind of slide gate nozzle brake valve of converter steel outlet of improvement " discloses a kind of slide gate nozzle brake valve of converter steel outlet of improvement;
Publication number is CN201538785U, and publication date is on August 4th, 2010, and the Chinese patent literature that name is called " converter tapping slide gate nozzle pushing off the slag tap hole " discloses a kind of converter tapping slide gate nozzle pushing off the slag tap hole;
Publication number is CN201424486, and publication date is on March 17th, 2010, and the Chinese patent literature that name is called " Multi-media rotary joint for blocking dregs of converter furnace sliding plate " discloses a kind of Multi-media rotary joint for blocking dregs of converter furnace sliding plate.
But the above-mentioned patent documentation relating to slide gate nozzle Slag Retaining Process technology does not all relate to related process and the control techniques of converter slide gate pushing off the slag.
Summary of the invention
The object of the present invention is to provide a kind of converter tap hole slide gate Slag Retaining Process, this Slag Retaining Process should in tapping whole process, and sentence slag exactly and pushing off the slag, the whole process realizing converter slide gate controls slag automatically; In addition, the control slag effect of this Slag Retaining Process also should meet the demand of process for making.
According to foregoing invention object, the invention provides a kind of converter tap hole slide gate Slag Retaining Process, it comprises the following steps:
After (1) one PLC receives converter tapping commencing signal, send primer fluid pressure station command to a Hydraulic Station;
(2) converter is fascinated from the zero position that converter inclining angle is 0 degree, to tap in ladle, and turning angle signal is sent to described PLC in real time, when converter inclining angle reaches first threshold value, slag-blocking gate valve is closed to stop tapping in PLC hydraulic control station;
(3) when converter inclining angle reaches second threshold value, slag-blocking gate valve is opened at PLC hydraulic control station, continues tapping;
(4) when molten steel of tapping is close to when terminating to start slag, when meeting following condition at the same time, PLC at once hydraulic control station closes slag-blocking gate valve:
A.PLC detects the slag signal that the infrared Lower proterozoic group system of an aligning tapping molten steel sends to PLC;
B. converter inclining angle >=85 degree;
C. the time of tapping >=3 minutes;
(5), after tapping terminates, converter is reset to zero position, PLC detect converter inclining angle be in-5 degree within the scope of 5 degree time, slag-blocking gate valve is opened slag and remaining molten steel to be discharged in hydraulic control station;
(6) PLC sends to Hydraulic Station and closes Hydraulic Station instruction.
In Slag Retaining Process of the present invention, when converter inclining angle reaches the first threshold value, slag-blocking gate valve is closed to stop tapping in PLC hydraulic control station, thus can prevent from tapping in earlier stage float on molten steel surface converter slag prior to molten steel discharged slag in ladle; When converter inclining angle reaches the second threshold value, because the converter slag flowed in tap hole has floated to molten steel surface, there is no converter slag in tap hole, therefore can open slag-blocking gate valve, continued tapping; When molten steel of tapping is close to when terminating to start slag, infrared Lower proterozoic group system sends slag signal to PLC, and PLC sends and closes slag-blocking gate valve instruction, prevents tapping later stage converter slag slag in ladle; In order to prevent in tapping process, because the reasons such as fire door slag cause infrared Lower proterozoic group system mistake to judge slag, before PLC sends and closes slag-blocking gate valve instruction, also must judge converter inclining angle >=85 degree and the time of tapping >=4 minute.
Preferably, in above-mentioned Slag Retaining Process, the first threshold value in described step (2) is 25-45 degree scope.
Preferably, in above-mentioned Slag Retaining Process, the second threshold value in described step (3) is the value within the scope of 70-80 degree.
Slag Retaining Process of the present invention, than existing Slag Retaining Process technology, has the following advantages:
(1) will the converter slag of slag to tap hole prior to molten steel when Slag Retaining Process of the present invention can control to tap effectively, make its can not tap time slag in ladle, thus improve the quality of tapping molten steel, reduce the processing cost of subsequent handling;
(2) Slag Retaining Process of the present invention is in conjunction with existing automatic Lower proterozoic group system, realizes automatically, effectively sentencing slag and pushing off the slag to going out molten steel, thus improves the efficiency of tapping;
(3) pushing off the slag of Slag Retaining Process of the present invention is effective, can meet the demand of process for making, thus while ensure that out steel quality, improves the efficiency of tapping.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of converter tap hole slide gate Slag Retaining Process of the present invention under a kind of embodiment.
Embodiment
Just in conjunction with Figure of description and specific embodiment, Slag Retaining Process of the present invention is described in further detail below.
Fig. 1 shows Slag Retaining Process of the present invention steps flow chart in the present embodiment.As shown in Figure 1, (in Fig. 1, α is converter inclining angle to Slag Retaining Process step of the present invention, and t is the tapping time, and AMEPA is infrared Lower proterozoic group system as follows.)：
(1), after PLC receives converter tapping commencing signal, primer fluid pressure station command is sent to Hydraulic Station;
(2) converter is fascinated from the zero position that converter inclining angle is 0 degree, to tap in ladle, and turning angle signal is sent to PLC in real time, when converter inclining angle reaches 35 degree (first default threshold value), slag-blocking gate valve is closed to stop tapping in PLC hydraulic control station;
(3) when converter inclining angle reaches 70 degree (second default threshold value), slag-blocking gate valve is opened at PLC hydraulic control station, continues tapping;
(4) when molten steel of tapping is close to when terminating to start slag, when meeting following condition at the same time, PLC at once hydraulic control station closes slag-blocking gate valve:
A.PLC detects the slag signal that the infrared Lower proterozoic group system of an aligning tapping molten steel sends to PLC;
B. converter inclining angle >=85 degree;
C. the time of tapping >=3 minutes;
(5) after tapping terminates, converter is reset to zero position, and PLC detects that converter inclining angle is 0 degree, and slag-blocking gate valve is opened slag and remaining molten steel to be discharged in hydraulic control station;
(6) PLC sends to Hydraulic Station and closes Hydraulic Station instruction.
That enumerates it should be noted that above is only specific embodiments of the invention, obviously the invention is not restricted to above embodiment, has many similar changes thereupon.If all distortion that those skilled in the art directly derives from content disclosed by the invention or associates, protection scope of the present invention all should be belonged to.
Claims (3)
1. a converter tap hole slide gate Slag Retaining Process, is characterized in that, comprises the following steps:
After (1) one PLC receives converter tapping commencing signal, send primer fluid pressure station command to a Hydraulic Station;
(2) converter is fascinated from the zero position that converter inclining angle is 0 degree, to tap in ladle, and turning angle signal is sent to described PLC in real time, when converter inclining angle reaches first threshold value, slag-blocking gate valve is closed to stop tapping in described PLC hydraulic control station;
(3) when converter inclining angle reaches second threshold value, slag-blocking gate valve is opened at described PLC hydraulic control station, continues tapping;
(4) when molten steel of tapping is close to when terminating to start slag, when meeting following condition at the same time, PLC at once hydraulic control station closes slag-blocking gate valve:
A.PLC detects the slag signal that the infrared Lower proterozoic group system of an aligning tapping molten steel sends to PLC;
B. converter inclining angle >=85 degree;
C. the time of tapping >=3 minutes;
(5), after tapping terminates, converter is reset to zero position, PLC detect converter inclining angle be in-5 degree within the scope of 5 degree time, slag-blocking gate valve is opened slag and remaining molten steel to be discharged in hydraulic control station;
(6) PLC sends to Hydraulic Station and closes Hydraulic Station instruction.
2. converter tap hole slide gate Slag Retaining Process as claimed in claim 1, it is characterized in that, the first threshold value in described step (2) is 25-45 degree.
3. converter tap hole slide gate Slag Retaining Process as claimed in claim 1 or 2, it is characterized in that, the second threshold value in described step (3) is the value within the scope of 70-80 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210034093.0A CN103255261B (en) | 2012-02-15 | 2012-02-15 | Converter tapping hole sliding gate slag-stopping process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210034093.0A CN103255261B (en) | 2012-02-15 | 2012-02-15 | Converter tapping hole sliding gate slag-stopping process |
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| CN103255261A CN103255261A (en) | 2013-08-21 |
| CN103255261B true CN103255261B (en) | 2015-01-21 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572073A (en) * | 2013-11-22 | 2014-02-12 | 宁夏鹏程致远自动化技术有限公司 | Novel tipping device for high-temperature material container |
| CN105200182A (en) * | 2015-11-06 | 2015-12-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Slag stopping method for process for smelting semisteel by converter |
| CN105274274A (en) * | 2015-11-06 | 2016-01-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing deoxidized aluminum-ferro consumption in steel tapping process of aluminum killed steel converter |
| CN105296702A (en) * | 2015-11-06 | 2016-02-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for increasing yield of semi-steel steelmaking Si alloy |
| CN105274275A (en) * | 2015-11-06 | 2016-01-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing rephosphorization during semi-steel steelmaking |
| CN111624884B (en) * | 2020-06-03 | 2022-06-24 | 中冶南方工程技术有限公司 | Automatic slag discharge control method and system for converter slag car linkage |
| CN112410502B (en) * | 2020-10-27 | 2022-04-12 | 安徽云天冶金科技股份有限公司 | Converter slide control system for pushing off slag |
| CN112501377A (en) * | 2020-11-17 | 2021-03-16 | 中冶南方工程技术有限公司 | Method and system for detecting content abnormality of converter steelmaking slag |
| CN114934150B (en) * | 2022-06-29 | 2023-06-23 | 莱芜钢铁集团银山型钢有限公司 | System and method for reducing slag quantity injected into steel ladle in converter tapping process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201525859U (en) * | 2009-10-30 | 2010-07-14 | 武汉钢铁(集团)公司 | Control device for tapping of converter |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201525859U (en) * | 2009-10-30 | 2010-07-14 | 武汉钢铁(集团)公司 | Control device for tapping of converter |
Non-Patent Citations (1)
| Title |
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| "宝钢炼钢厂转炉挡渣工艺技术的发展";孙兴洪等;《宝钢技术》;20100415(第2期);第60页表2，"2.1 转炉出钢前期挡渣"，第61页"2.3 转炉出钢后期挡渣"，第62页左栏最后1段 * |
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