CN103510128A - Method for monitoring interface of molten aluminum in aluminum electrolysis tank in real time - Google Patents
Method for monitoring interface of molten aluminum in aluminum electrolysis tank in real time Download PDFInfo
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- CN103510128A CN103510128A CN201210202732.XA CN201210202732A CN103510128A CN 103510128 A CN103510128 A CN 103510128A CN 201210202732 A CN201210202732 A CN 201210202732A CN 103510128 A CN103510128 A CN 103510128A
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- aluminium cell
- eddy current
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Abstract
The invention discloses a method for monitoring the interface of molten aluminum in an aluminum electrolysis tank in real time. An eddy current sensor (1) is installed in a position 200-1200mm over a molten metal in the aluminum electrolysis tank, the eddy current sensor (1) is connected with a liquid level controller (2), and the liquid level controller (2) is connected with a computer control system (3); the frequency of a high-frequency oscillation current in a front-end processor in the liquid level controller (2) is 1.25Hz-6GHz, and the high-frequency oscillation current is guided to a probe of the eddy current sensor (1) in the tank through an extension cable and generates an alternating magnetic field in a coil at the head of the probe; and when a liquid for detection gets close to the magnetic field, an induction current and an alternating magnetic field having an opposite direction with the coil at the head are generated on the surface of the liquid, so the amplitude and the phase of the high-frequency current of the coil at the head of the probe are changed, the above changes are processed by the liquid level controller (2) to be converted into an analog/digital signal, and the analog/digital signal is sent to the host computer control system (3) for processing.
Description
Technical field
The method that the present invention relates to molten aluminum liquid interface in a kind of Real-Time Monitoring aluminium cell, belongs to aluminium cell technical field.
Background technology
In aluminium cell production process, under the effect of powerful electromagnetic force, in groove, fused electrolyte /Lv Ye interface can produce fluctuation, rotation and distortion, can cause secondary reaction increase, the current efficiency of electrolyzer to reduce, and can affect the normal production of aluminium cell when serious.Detect aluminium liquid-electrolyte interface in aluminium cell and just seem particularly important, but the production environment of high temperature, highly corrosive in electrolyzer, the sensor of most of contact all cannot be worked for a long time in electrolyzer.Therefore not yet there is at present good way on-line monitoring aluminium cell to produce Shi Lvye interface.
Summary of the invention
The object of the invention is to, the method at molten aluminum liquid interface in a kind of Real-Time Monitoring aluminium cell is provided, with the deficiency of can not on-line monitoring aluminium cell producing Shi Lvye interface that overcomes that prior art exists.
The present invention is by the following technical solutions: above the molten metal in aluminium cell, eddy current sensor is installed in the position of 200～1200mm, and eddy current sensor is connected with liquid level controller, and liquid level controller is connected with computer control system; The frequency of the fore-lying device medium-high frequency oscillating current in liquid level controller is 1.25Hz-6GHz, and this HF oscillation electric current causes eddy current sensor in groove by extension cable and pops one's head in above, the magnetic field that produces alternation in the coil of probe head; When measured liquid is near this magnetic field, at this fluid surface, produce induced current, meanwhile this current vortex field also produces the alternating magnetic field of a direction and head coil opposite direction, amplitude and the phase place of probe head coil high-frequency electric current are changed, this variation is processed and is converted into analog/digital signal and sends to host computer Controlling System to process by liquid level controller, or directly by liquid level controller, is transmitted to slot control machine or other smart machines carry out true-time operation to electrolyzer.
A plurality of (more than two) eddy current sensor is installed in an aluminium cell.
Eddy current sensor is arranged on cover plate, bin wall or the special stand of aluminium cell.
The present invention adopts contactless sensor, and utilizing the interior two kinds of melts of groove a kind of is nonmetallic feature for metal is another kind of, adopts the mode of high-frequency electromagnetic induction, Real-Time Monitoring aluminium cell Nei Lvye interface.
The present invention why oscillating current of proportion 1.25Hz-6GHz, as signal source, is mainly to consider, aluminium cell is produced and adopted direct current supply, and the production current perturbation that can observe in actual production 0.05 Hz～0.2Hz only.The inducedmagnetic field that oscillating current of the present invention induces be easy to surrounding environment magnetic field separation out.
Equally, oscillating current of the present invention can only induce current vortex field and inducedmagnetic field in liquid metal, inoperative to nonmetallic electrolyte melt.
The present invention can be real-time the changing conditions at monitoring aluminium cell Nei Lvye interface, convenient operation personnel understand and grasp the production law of aluminium cell, carry out timely production operation, can fully improve electrolyzer production energy-saving efficiency, have wide prospect of the application.
accompanying drawing explanation
Fig. 1 is the method schematic diagram that eddy current sensor detects electrolyzer Lv Ye interface.
Fig. 2 is that eddy current sensor is at aluminium cell Nei installation site schematic diagram.
Embodiment
Embodiments of the invention: as shown in Figure 1 and Figure 2, above the molten metal in aluminium cell, eddy current sensor 1 is installed in the position of 200～1200mm, and eddy current sensor 1 is connected with liquid level controller 2, and liquid level controller 2 is connected with computer control system 3; The frequency of the fore-lying device medium-high frequency oscillating current in liquid level controller 2 is 1.25Hz-6GHz, and this HF oscillation electric current causes eddy current sensor 1 in groove by extension cable and pops one's head in above, the magnetic field that produces alternation in the coil of probe head; When measured liquid is near this magnetic field, at this fluid surface, produce induced current, meanwhile this current vortex field also produces the alternating magnetic field of a direction and head coil opposite direction, amplitude and the phase place of probe head coil high-frequency electric current are changed, this variation is processed and is converted into analog/digital signal by liquid level controller 2 and sends to host computer Controlling System 3 to process, or directly by liquid level controller 2, is transmitted to slot control machine or other smart machines carry out true-time operation to electrolyzer.
Eddy current sensor 1 is arranged on cover plate, bin wall or other independent special stands of aluminium cell, gather the signal that Lv Ye interface changes nearby, a plurality of eddy current sensors 1 can be installed in an aluminium cell and to obtain aluminium liquid 5 interfaces of aluminium cell 4 interior various pieces, change real time data.
Claims (3)
1. the method at molten aluminum liquid interface in a Real-Time Monitoring aluminium cell, it is characterized in that: above the molten metal in aluminium cell, eddy current sensor (1) is installed in the position of 200～1200mm, eddy current sensor (1) is connected with liquid level controller (2), and liquid level controller (2) is connected with computer control system (3); The frequency of the fore-lying device medium-high frequency oscillating current in liquid level controller (2) is 1.25Hz-6GHz, and this HF oscillation electric current causes on eddy current sensor in groove (1) probe by extension cable, the magnetic field that produces alternation in the coil of probe head; When measured liquid is near this magnetic field, at this fluid surface, produce induced current, meanwhile this current vortex field also produces the alternating magnetic field of a direction and head coil opposite direction, amplitude and the phase place of probe head coil high-frequency electric current are changed, this variation is processed and is converted into analog/digital signal by liquid level controller (2) and sends to host computer Controlling System (3) to process, or directly by liquid level controller (2), is transmitted to slot control machine or other smart machines carry out true-time operation to electrolyzer.
2. the method at molten aluminum liquid interface in Real-Time Monitoring aluminium cell according to claim 1, is characterized in that: a plurality of eddy current sensors (1) are installed in an aluminium cell.
3. the method at molten aluminum liquid interface in Real-Time Monitoring aluminium cell according to claim 1, is characterized in that: eddy current sensor (1) is arranged on cover plate, bin wall or the special stand of aluminium cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202732.XA CN103510128B (en) | 2012-06-19 | 2012-06-19 | The method at molten aluminum liquid interface in monitoring aluminium cell in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202732.XA CN103510128B (en) | 2012-06-19 | 2012-06-19 | The method at molten aluminum liquid interface in monitoring aluminium cell in real time |
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| CN103510128A true CN103510128A (en) | 2014-01-15 |
| CN103510128B CN103510128B (en) | 2016-07-06 |
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| CN201210202732.XA Active CN103510128B (en) | 2012-06-19 | 2012-06-19 | The method at molten aluminum liquid interface in monitoring aluminium cell in real time |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5554411A (en) * | 1978-10-17 | 1980-04-21 | Nippon Kokan Kk <Nkk> | Level meter for molten metal in continuous casting mold |
| US4647854A (en) * | 1983-09-09 | 1987-03-03 | Nippon Kokan Kabushiki Kaisha | Apparatus for measuring the level of the molten metal in the mold of a continuous casting machine |
| JPH06258129A (en) * | 1993-03-05 | 1994-09-16 | Nisshin Steel Co Ltd | Method for measuring molten metal surface level under slag |
| CN1318149A (en) * | 1999-07-16 | 2001-10-17 | 浦项综合制铁株式会社 | Appts. and method for measuring molten metal level in electromagnetic continuous casting |
| CN2529215Y (en) * | 2001-06-25 | 2003-01-01 | 姜虹 | Vortex molten steel liquid level measuring device |
| CN201251467Y (en) * | 2008-06-20 | 2009-06-03 | 宝山钢铁股份有限公司 | Anti-interference unit for eddy current sensor |
| CN201264081Y (en) * | 2008-09-27 | 2009-07-01 | 鞍钢股份有限公司 | Self-stabilization accurate controller of continuous casting tundish liquid level |
-
2012
- 2012-06-19 CN CN201210202732.XA patent/CN103510128B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5554411A (en) * | 1978-10-17 | 1980-04-21 | Nippon Kokan Kk <Nkk> | Level meter for molten metal in continuous casting mold |
| US4647854A (en) * | 1983-09-09 | 1987-03-03 | Nippon Kokan Kabushiki Kaisha | Apparatus for measuring the level of the molten metal in the mold of a continuous casting machine |
| JPH06258129A (en) * | 1993-03-05 | 1994-09-16 | Nisshin Steel Co Ltd | Method for measuring molten metal surface level under slag |
| CN1318149A (en) * | 1999-07-16 | 2001-10-17 | 浦项综合制铁株式会社 | Appts. and method for measuring molten metal level in electromagnetic continuous casting |
| CN2529215Y (en) * | 2001-06-25 | 2003-01-01 | 姜虹 | Vortex molten steel liquid level measuring device |
| CN201251467Y (en) * | 2008-06-20 | 2009-06-03 | 宝山钢铁股份有限公司 | Anti-interference unit for eddy current sensor |
| CN201264081Y (en) * | 2008-09-27 | 2009-07-01 | 鞍钢股份有限公司 | Self-stabilization accurate controller of continuous casting tundish liquid level |
Non-Patent Citations (3)
| Title |
|---|
| 宋东飞: "涡流检测在板坯连铸钢水液位的应用", 《冶金设备》 * |
| 杜科选等: "《铝电解及铝合金铸造生产和安全》", 31 May 2012, 北京：冶金工业出版社 * |
| 黄绍伟: "结晶器液位检测和控制系统优化", 《可编程控制器与工厂自动化》 * |
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| CN103510128B (en) | 2016-07-06 |
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Effective date of registration: 20171214 Address after: Jin Zhu Xi Lu Lake District 550081 Guizhou city of Guiyang province No. 2 aluminum technology building Patentee after: Guizhou innovation light metal processing equipment Engineering Technology Research Center Co Ltd Address before: 550081 Guiyang Province, Jinyang New District, Zhu Zhu Road, No. 2 Patentee before: Guiyang Aluminum & Magnesium Design Institute Co., Ltd. |
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