CN102002557A - 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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- CN102002557A CN102002557A CN2010105243798A CN201010524379A CN102002557A CN 102002557 A CN102002557 A CN 102002557A CN 2010105243798 A CN2010105243798 A CN 2010105243798A CN 201010524379 A CN201010524379 A CN 201010524379A CN 102002557 A CN102002557 A CN 102002557A
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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 be used for the control method of the steel secondary refining pattern of production high-quality steel.
Background technology
The RH vacuum processing technique is a kind of steel secondary refining technology that is used for production high-quality steel, in the whole technology, 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 pumped vacuum systems adopts dry vacuum pump that process gas is carried out pump drainage.When refining difference steel grade, the desired vacuum tightness of technology has nothing in common with each other, mainly contain that light processing, this processing, ultra low-carbon steel are handled, unkilled steel is handled, deoxidized steel is handled five big process modelings, the existing same time of RH dry type pumped vacuum systems can only be carried out the processing of a steel grade.
Summary of the invention
In view of this,, the invention discloses a kind of refining pattern that automaticallyes switch, the RH dry type pumped vacuum systems refining pattern autocontrol method that requires with the refinery practice that adapts to different steel grades in order to address the above problem.
The object of the present invention is achieved like this: RH dry type pumped vacuum systems refining pattern autocontrol method, described RH dry type pumped vacuum systems 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 and is instructed 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 handled refined model, unkilled steel processing refined model, deoxidized steel is handled refined model;
Further, described light processing refined model is meant, 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;
Handle refined model for described and be meant 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 handled refined model and is meant, 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 handled refined model and is meant, 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 handled refined model and is meant, 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 handled, unkilled steel is handled, deoxidized steel is handled.
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 pumped vacuum systems refining pattern autocontrol method.
Embodiment
The RH dry type pumped vacuum systems 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 pumped vacuum systems 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 processing such as decarburization by the vacuum oxygen system, abolish vacuum by broken empty multiple pressing system, present embodiment is except that 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 the 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 to control the control unit 3 that electric controlled vacuum main valve 2 opens and closes, also comprise the electric controlled vacuum by-pass valve 4 and the differential pressure detector 5 that are arranged in parallel with electric controlled vacuum main valve 2, the electric controlled vacuum by-pass valve also is a stopping valve, the differential pressure detection signal output terminal of described differential pressure detector 5 connects the signal input part of control unit 3, 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 the vacuum main valve, after differential pressure, in time the differential pressure detection signal is back to control unit, control unit is controlled the 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 are provided with vacuum inspective meter I 6 and vacuum inspective meter II 7 respectively, described vacuum inspective meter I 6 and the vacuum tightness signal output part of vacuum inspective meter II 7 are connected the signal input part of 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 pumped vacuum systems 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 handled refined model, unkilled steel processing refined model, deoxidized steel is handled refined model.
Described light processing refined model is meant, 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.
Handle refined model for described and be meant 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 handled refined model and is meant, 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 handled refined model and is meant, 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 handled refined model and is meant, 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 and is instructed 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 (3)
1.RH dry type pumped vacuum systems refining pattern autocontrol method, described RH dry type pumped vacuum systems 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) Controlling System is sent corresponding refining and is instructed 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.
2. RH dry type pumped vacuum systems refining pattern autocontrol method as claimed in claim 1, it is characterized in that: step 2) in, described refined model comprises that light processing refined model, this processing refined model, ultra low-carbon steel are handled refined model, unkilled steel processing refined model, deoxidized steel is handled refined model.
3. RH dry type pumped vacuum systems refining pattern autocontrol method as claimed in claim 2, it is characterized in that: described light processing refined model is meant, make vacuum tightness equal 25KPa, add aluminium alloy in the time of the 3rd minute, thermometric, oxygen determination content, sampling, add manganese alloy in the time of the 8th minute, abolished vacuum on the 15th minute;
Handle refined model for described and be meant 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 handled refined model and is meant, 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 handled refined model and is meant, 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 handled refined model and is meant, 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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| CN 201010524379 CN102002557B (en) | 2010-10-29 | 2010-10-29 | Refining mode automatic control method of RH (relative humidity) dry type vacuum-pumping system |
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| CN 201010524379 CN102002557B (en) | 2010-10-29 | 2010-10-29 | Refining mode automatic control method of RH (relative humidity) dry type vacuum-pumping system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758052A (en) * | 2012-07-10 | 2012-10-31 | 北京首钢自动化信息技术有限公司 | Control method for RH vacuum processing mode |
| CN105385812A (en) * | 2015-10-22 | 2016-03-09 | 武汉钢铁(集团)公司 | RH vacuum refining control system |
| CN108342540A (en) * | 2018-04-18 | 2018-07-31 | 武汉科技大学 | A kind of steel mill RH refining equipment automatic control systems |
Citations (3)
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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 |
| JP2005281722A (en) * | 2004-03-26 | 2005-10-13 | Jfe Steel Kk | Method for restraining demanganese from molten steel and rh-degassing apparatus |
| 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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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2005281722A (en) * | 2004-03-26 | 2005-10-13 | Jfe Steel Kk | Method for restraining demanganese from molten steel and rh-degassing apparatus |
| 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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| 陈祥: "攀钢3#RH真空处理装置自动控制系统", 《冶金自动化》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758052A (en) * | 2012-07-10 | 2012-10-31 | 北京首钢自动化信息技术有限公司 | Control method for RH vacuum processing mode |
| CN105385812A (en) * | 2015-10-22 | 2016-03-09 | 武汉钢铁(集团)公司 | RH vacuum refining control system |
| CN108342540A (en) * | 2018-04-18 | 2018-07-31 | 武汉科技大学 | A kind of steel mill RH refining equipment automatic control systems |
| 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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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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Effective date of registration: 20210419 Address after: Three village 400080 Dadukou District of Chongqing weir building 1 No. 1 Patentee after: DESIGN INSTITUTE OF CHONGQING IRON & STEEL GROUP Co.,Ltd. Address before: Three village 400080 Dadukou District of Chongqing weir building 1 No. 1 Patentee before: CHONGQING IRON & STEEL (Group) Co.,Ltd. Patentee before: DESIGN INSTITUTE OF CHONGQING IRON & STEEL GROUP Co.,Ltd. |
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