CN102002557B - Refining mode automatic control method of RH (relative humidity) dry type vacuum-pumping system - Google Patents
Refining mode automatic control method of RH (relative humidity) dry type vacuum-pumping system Download PDFInfo
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- CN102002557B CN102002557B CN 201010524379 CN201010524379A CN102002557B CN 102002557 B CN102002557 B CN 102002557B CN 201010524379 CN201010524379 CN 201010524379 CN 201010524379 A CN201010524379 A CN 201010524379A CN 102002557 B CN102002557 B CN 102002557B
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Abstract
The invention relates to a control method of a liquid steel secondary refining mode for producing high-quality steel, by which the refining mode can be automatically switched to adapt to refining process requirements of different types of steel, in particular to a refining mode automatic control method of an RH (relative humidity) dry type vacuum-pumping system. The RH dry type vacuum-pumping system comprises a control system, a differential pressure switching system, a vacuum processing system, a vacuum charging system, a vacuum oxygen blowing system and a vacuum breaking and pressure recovery system, and the method comprises the following steps: 1) sending out a refining start instruction after the steel ladle is in place; 2) according to refining types of steel, and determining a refining mode of each station by utilizing the control system; and 3) sending out corresponding refining instructions to the differential pressure switching system, the vacuum processing system, the vacuum charging system, the vacuum oxygen blowing system and the vacuum breaking and pressure recovery system of each station, and enabling each station to execute refining operation according to the refining mode.
Description
Technical field
The present invention relates to the control method for the production of the steel secondary refining pattern of high-quality steel.
Background technology
The RH vacuum processing technique is a kind of steel secondary refining technique for the production of the high-quality steel, in the whole technique, the molten steel metallurgical reaction is to carry out in block has the vacuum tank of refractory lining, vacuum tank top is provided with the process gas outlet, be used for the process gas extraction is made the vacuum tightness that reaches required in the vacuum tank, RH dry-type vacuum pumping system adopts dry vacuum pump that process gas is carried out pump drainage.When the different steel grade of refining, the desired vacuum tightness of technique is different, mainly contain that light processing, this processing, ultra low-carbon steel are processed, unkilled steel is processed, deoxidized steel is processed five large process modelings, the existing same time of RH dry-type vacuum pumping system can only be carried out the processing of a steel grade.
Summary of the invention
In view of this, in order to address the above problem, the invention discloses a kind of refining pattern that automaticallyes switch, the RH dry-type vacuum pumping system refining pattern autocontrol method that requires with the refinery practice that adapts to different steel grades.
The object of the present invention is achieved like this: RH dry-type vacuum pumping system refining pattern autocontrol method, described RH dry-type vacuum pumping system comprises Controlling System, differential pressure switched system, vacuum flush system, vacuum loading systems, vacuum oxygen system and broken empty multiple pressing system, comprises the steps:
1) after ladle put in place, Controlling System was sent the refining sign on;
2) Controlling System is determined the refined model of each station according to the refining steel grade of each station;
3) Controlling System is sent corresponding refining instruction to differential pressure switched system, vacuum flush system, vacuum loading systems, vacuum oxygen system and the broken empty multiple pressing system of each station, makes each station carry out refining operation by the refining mode instruction.
Further, step 2) in, described refined model comprises that light processing refined model, this processing refined model, ultra low-carbon steel are processed refined model, unkilled steel processing refined model, deoxidized steel is processed refined model;
Further, described light processing refined model refers to, makes vacuum tightness equal 25KPa, adds aluminium alloy in the time of the 3rd minute, and thermometric, oxygen determination content, sampling add manganese alloy in the time of the 8th minute, abolishes vacuum on the 15th minute;
Process refined model for described and refer to that make vacuum tightness equal 20KPa, thermometric, oxygen determination content, sampling make vacuum tightness equal 200Pa, add alloy in the time of the 10th minute, abolished vacuum on the 20th minute;
Described ultra low-carbon steel is processed refined model and is referred to, makes vacuum tightness equal 67Pa, adds alloy in the time of the 15th minute, thermometric, surveys hydrogen richness, sampling, abolishes vacuum on the 25th minute;
Described deoxidized steel is processed refined model and is referred to, makes vacuum tightness equal 7KPa, and the 5th minute begins to heat up, and adds alloy in the time of the 10th minute, and vacuum was abolished in thermometric, oxygen determination content, sampling on the 10th minute;
Described unkilled steel is processed refined model and is referred to, makes vacuum tightness equal 6KPa, and the 3rd minute begins to heat up, and adds alloy in the time of the 15th minute, thermometric, surveys hydrogen richness, sampling, abolishes vacuum on the 25th minute.
The invention has the beneficial effects as follows: the crush-cutting of can working poor changes system, switches different refining patterns, adapts to the processing requirement of different steel grades, i.e. gently processing, this processing, ultra low-carbon steel are processed, unkilled steel is processed, deoxidized steel is processed.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing:
Fig. 1 shows the structural representation of differential pressure switched system;
Fig. 2 shows the schematic flow sheet of RH dry-type vacuum pumping system refining pattern autocontrol method.
Embodiment
The RH dry-type vacuum pumping system refining pattern autocontrol method of present embodiment, the refining pattern can automatically switch, to adapt to the refinery practice requirement of different steel grades, described RH dry-type vacuum pumping system comprises Controlling System, the differential pressure switched system, vacuum flush system, vacuum loading systems, vacuum oxygen system and broken empty multiple pressing system, present method vacuumizes by vacuum flush system, control vacuum tightness by the differential pressure switched system, add alloy material in the refining process by vacuum loading systems, carry out the processing such as decarburization by the vacuum oxygen system, abolish vacuum by broken empty multiple pressing system, present embodiment is except the differential pressure switched system, vacuum flush system, vacuum loading systems, vacuum oxygen system and broken empty multiple pressing system can use device of the prior art, the present invention mainly controls vacuum tightness by control differential pressure switched system, to realize control and the switching of refining pattern.
Referring to Fig. 1, described differential pressure switched system, comprise the electric controlled vacuum main valve 2 that is arranged on the process for making gas circuit 1 and be used for the control unit 3 that control electric controlled vacuum main valve 2 opens and closes, also comprise the electric controlled vacuum by-pass valve 4 and the differential pressure measuring instrument 5 that are arranged in parallel with electric controlled vacuum main valve 2, the electric controlled vacuum by-pass valve also is stopping valve, the signal input part of the differential pressure measuring signal output part connection control unit 3 of described differential pressure measuring instrument 5, the control signal output terminal of described control unit 3 connects the pilot circuit of electric controlled vacuum by-pass valve 4, this device can be according to the different requirements of several process modelings to vacuum tightness, before detecting vacuum main valve, after differential pressure, in time the differential pressure measuring signal is back to control unit, control unit is controlled keying and the switching time of vacuum bypass and vacuum main valve according to differential pressure signal, to reach different vacuum tightness, satisfy the vacuum tightness requirement of different steel grade refining processs.
In the present embodiment, described electric controlled vacuum main valve 2 front and back arrange respectively vacuum inspective meter I 6 and vacuum inspective meter II 7, the vacuum tightness signal output part of described vacuum inspective meter I 6 and vacuum inspective meter II 7 is the signal input part of connection control unit 3 respectively, to detect the vacuum tightness of electric controlled vacuum main valve front and back, and the vacuum tightness signal is back to control unit, control unit judges whether to reach keying and the switching time that required vacuum tightness is controlled vacuum bypass and vacuum main valve, to reach different vacuum tightness, satisfy the vacuum tightness requirement of different steel grade refining processs.
Referring to Fig. 2, the RH dry-type vacuum pumping system refining pattern autocontrol method of present embodiment comprises the steps:
1) after ladle put in place, Controlling System was sent the refining sign on.
2) Controlling System is determined the refined model of each station according to the refining steel grade of each station; Described refined model comprises that light processing refined model, this processing refined model, ultra low-carbon steel are processed refined model, unkilled steel processing refined model, deoxidized steel is processed refined model.
Described light processing refined model refers to, makes vacuum tightness equal 25KPa, adds aluminium alloy in the time of the 3rd minute, and thermometric, oxygen determination content, sampling add manganese alloy in the time of the 8th minute, abolishes vacuum on the 15th minute.
Process refined model for described and refer to that make vacuum tightness equal 20KPa, thermometric, oxygen determination content, sampling make vacuum tightness equal 200Pa, add alloy in the time of the 10th minute, abolished vacuum on the 20th minute.
Described ultra low-carbon steel is processed refined model and is referred to, makes vacuum tightness equal 67Pa, adds alloy in the time of the 15th minute, thermometric, surveys hydrogen richness, sampling, abolishes vacuum on the 25th minute.
Described deoxidized steel is processed refined model and is referred to, makes vacuum tightness equal 7KPa, and the 5th minute begins to heat up, and adds alloy in the time of the 10th minute, and vacuum was abolished in thermometric, oxygen determination content, sampling on the 10th minute.
Described unkilled steel is processed refined model and is referred to, makes vacuum tightness equal 6KPa, and the 3rd minute begins to heat up, and adds alloy in the time of the 15th minute, thermometric, surveys hydrogen richness, sampling, abolishes vacuum on the 25th minute.
3) Controlling System is sent corresponding refining instruction to differential pressure switched system, vacuum flush system, vacuum loading systems, vacuum oxygen system and the broken empty multiple pressing system of each station, makes each station carry out refining operation by the refining mode instruction.
The above only preferably is not limited to the present invention for of the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (1)
1.RH dry-type vacuum pumping system refining pattern autocontrol method, described RH dry-type vacuum pumping system comprises Controlling System, differential pressure switched system, vacuum flush system, vacuum loading systems, vacuum oxygen system and broken empty multiple pressing system, it is characterized in that: comprise the steps:
1) after ladle put in place, Controlling System was sent the refining sign on;
2) Controlling System is determined the refined model of each station according to the refining steel grade of each station;
3) send corresponding refining instruction to differential pressure switched system, vacuum flush system, vacuum loading systems, vacuum oxygen system and the broken empty multiple pressing system of each station, make each station carry out refining operation by the refining mode instruction;
Described differential pressure switched system, comprise the electric controlled vacuum main valve that is arranged on the process for making gas circuit and be used for the control unit that control electric controlled vacuum main valve opens and closes, also comprise the electric controlled vacuum by-pass valve and the differential pressure measuring instrument that are arranged in parallel with the electric controlled vacuum main valve, the electric controlled vacuum by-pass valve also is stopping valve, the signal input part of the differential pressure measuring signal output part connection control unit of described differential pressure measuring instrument, the control signal output terminal of described control unit connects the pilot circuit of electric controlled vacuum by-pass valve, and control unit is controlled keying and the switching time of vacuum bypass and vacuum main valve according to differential pressure signal;
Step 2) in, described refined model comprises that light processing refined model, this processing refined model, ultra low-carbon steel are processed refined model, unkilled steel processing refined model, deoxidized steel is processed refined model;
Described light processing refined model refers to, makes vacuum tightness equal 25KPa, adds aluminium alloy in the time of the 3rd minute, and thermometric, oxygen determination content, sampling add manganese alloy in the time of the 8th minute, abolishes vacuum on the 15th minute;
Process refined model for described and refer to that make vacuum tightness equal 20KPa, thermometric, oxygen determination content, sampling make vacuum tightness equal 200Pa, add alloy in the time of the 10th minute, abolished vacuum on the 20th minute;
Described ultra low-carbon steel is processed refined model and is referred to, makes vacuum tightness equal 67Pa, adds alloy in the time of the 15th minute, thermometric, surveys hydrogen richness, sampling, abolishes vacuum on the 25th minute;
Described deoxidized steel is processed refined model and is referred to, makes vacuum tightness equal 7KPa, and the 5th minute begins to heat up, and adds alloy in the time of the 10th minute, and vacuum was abolished in thermometric, oxygen determination content, sampling on the 10th minute;
Described unkilled steel is processed refined model and is referred to, makes vacuum tightness equal 6KPa, and the 3rd minute begins to heat up, and adds alloy in the time of the 15th minute, thermometric, surveys hydrogen richness, sampling, abolishes vacuum on the 25th minute.
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| CN102758052B (en) * | 2012-07-10 | 2013-06-19 | 北京首钢自动化信息技术有限公司 | Control method for RH vacuum processing mode |
| CN105385812B (en) * | 2015-10-22 | 2017-10-31 | 武汉钢铁有限公司 | A kind of RH vacuum refinings control system |
| CN108342540B (en) * | 2018-04-18 | 2019-12-03 | 武汉科技大学 | A kind of steel mill RH refining equipment automatic control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101476022A (en) * | 2009-02-16 | 2009-07-08 | 重庆钢铁(集团)有限责任公司 | RH dry type vacuum refining apparatus |
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| JPH11335721A (en) * | 1998-05-25 | 1999-12-07 | Sumitomo Metal Ind Ltd | Method for controlling temperature of molten metal in secondary refining and apparatus therefor |
| JP4379176B2 (en) * | 2004-03-26 | 2009-12-09 | Ｊｆｅスチール株式会社 | Method of suppressing Mn removal from molten steel and RH degassing apparatus |
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| CN101476022A (en) * | 2009-02-16 | 2009-07-08 | 重庆钢铁(集团)有限责任公司 | RH dry type vacuum refining apparatus |
Non-Patent Citations (4)
| Title |
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| JP特开2005-281722A 2005.10.13 |
| JP特开平11-335721A 1999.12.07 |
| 攀钢3#RH真空处理装置自动控制系统;陈祥;《冶金自动化》;20100531;第34卷(第3期);34-38、48 * |
| 陈祥.攀钢3#RH真空处理装置自动控制系统.《冶金自动化》.2010,第34卷(第3期),34-38、48. |
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Address after: Three village 400080 Dadukou District of Chongqing weir building 1 No. 1 Patentee after: Chongqing Iron & Steel (Group) Co., Ltd. Patentee after: Company limited of Design Inst., Chongqing Iron & Steel Group Address before: Three village 400080 Dadukou District of Chongqing weir building 1 No. 1 Patentee before: Chongqing Iron & Steel (Group) Co., Ltd. Patentee before: Chongqing Iron & Steel Group Design Institute |
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