CN103045795B - Liquid level measurement system of converter sublance - Google Patents
Liquid level measurement system of converter sublance Download PDFInfo
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- CN103045795B CN103045795B CN201310030200.7A CN201310030200A CN103045795B CN 103045795 B CN103045795 B CN 103045795B CN 201310030200 A CN201310030200 A CN 201310030200A CN 103045795 B CN103045795 B CN 103045795B
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Abstract
The invention provides a liquid level measurement system of a converter sublance. The liquid level measurement system comprises a sublance, a compensating lead wire, a signal processor, a promoting motor and a programmable logic controller (PLC), wherein the sublance is used for collecting a feedback voltage in a furnace hearth in real time when being inserted into a converter, and transmitting the feedback voltage to the signal processor through the compensating lead wire; the promoting motor is internally provided with an encoder and is used for collecting the running height of a combined type probe inserted into the converter in real time; the PLC is used for transmitting the running height to the signal processor; and the signal processor is used for determining the height of a liquid level of a molten pool and the thickness of a slag layer according to the running height and the feedback voltage. The liquid level measurement system solves the technical problem of low measurement success rate of an electrode type/fixed oxygen type liquid level measurement probe in prior art and is beneficial to the improvement of steel smelting efficiency, the reduction of the cost, the saving of energy and the reduction of consumption.
Description
Technical field
The present invention, about converter field of measuring technique, particularly about the measuring technology of revolving furnace sublance smelting molten steel, is a kind of revolving furnace sublance liquid level measuring system concretely.
Background technology
Revolving furnace sublance can be used in smelting molten steel process, it obtains real data from converter, can detect molten steel molten bath and temperature of solidification, oxygen level and molten metal pool level height, can carry out in converter liquid steel sampling during in erect position, and without interrupting oxygen blast process, this has great meaning for keeping smelting process to stablize.The position of molten bath molten iron level in converter, is the prerequisite that determines that oxygen rifle blowing height and sublance locate, and need converting process be controlled and be measured according to the oxygen rifle height of processing requirement and sublance depth of penetration.Therefore, accurately whether molten iron level position numerical value, directly affect the quality of convertor steelmaking process and steel.
In prior art, revolving furnace sublance is generally measured liquid steel level by the combined probe on it, combined probe mainly contains following two kinds of forms: one is before probe, to be equiped with two electrodes, turning circuit in the time that probe contacts with metal bath surface, according to sublance rifle position now, measure bath surface value; One is to adopt Determining oxygen probe, and when probe is when molten steel-slag blanket interface, molten steel temperature and oxygen activity produce transition, utilize oxygen gesture to change and now the rifle position of sublance determine molten steel face.
There is following technical problem in above-mentioned two kinds of survey level probes that sublance system is used: the success ratio of measurement is all very low, and cannot measure the thickness of slag blanket in molten bath.Conventionally electrode type level probe is surveyed into rate approximately 40%, determines oxygen type level probe and surveys into the about 60%-80% of rate, so will certainly increase STEELMAKING PRODUCTION cost, has reduced production efficiency, and the survey level probe of above-mentioned two kinds of forms is not all well positioned to meet the requirement of sublance function.
Summary of the invention
The problems referred to above that exist in order to overcome prior art, the invention provides a kind of revolving furnace sublance liquid level measuring system, by iron-core coil being integrated in sublance Compound transducer, having solved electrode type of the prior art/determine oxygen type surveys level probe and measures the low technical problem of success ratio, and be conducive to improve steel-making efficiency, reduce costs, energy-saving and cost-reducing.
The object of the invention is, a kind of revolving furnace sublance liquid level measuring system is provided, described revolving furnace sublance liquid level measuring system specifically comprises sublance 1, the compensating lead wire 2 being connected with described sublance, signal processor 3, the lifting motor 4 being connected with described sublance and programmable logic controller PLC5, wherein, described sublance 1, comprise rifle body 11 and combined type probe 12, described combined type probe 12 comprises outer tube 121, signal output inserter 122, be arranged on iron core 123 and coil 124 in described outer tube 121, described coil 124 is wound around described iron core 123 and is connected with described signal output inserter 122, described sublance 1 is the feedback voltage in Real-time Collection burner hearth when inserting converter, and by described compensating lead wire 2, described feedback voltage is sent to described signal processor 3, described lifting motor 4, inside is provided with encoder 41, inserts the operation height of converter for the combined type probe 12 described in Real-time Collection, described PLC5, for being highly sent to described operation described signal processor 3, described signal processor 3, for determining height and the thickness of slag layer of molten metal pool level according to described operation height and described feedback voltage.
Preferably, described coil 124 and described iron core 123 are fixed on the inwall of described outer tube 121.
Preferably, described coil 124 surfaces scribble insulation layer.
Preferably, described coil 124 is copper cash.
Preferably, described revolving furnace sublance liquid level measuring system also comprises the display unit 6 being connected with described signal processor 3, for showing in real time and store height and the thickness of slag layer of described feedback voltage, operation height, molten metal pool level.
Preferably, described display unit 6 is computer.
Preferably, described signal processing implement body comprises: curve plotting unit, for drawing voltage-altitude curve according to described operation height and described feedback voltage; Transition point determining unit, for analyzing described voltage-altitude curve, determines transition point; Molten metal pool level height determining unit, for determining the height of described molten metal pool level according to described transition point; Thickness of slag layer determining unit, for determining thickness of slag layer according to described transition point.
Beneficial effect of the present invention is, a kind of revolving furnace sublance liquid level measuring system is provided, by iron-core coil is integrated in sublance Compound transducer, solve electrode type of the prior art/determine oxygen type and surveyed level probe and measure the low technical problem of success ratio, be conducive to improve steel-making efficiency, reduce costs, energy-saving and cost-reducing, and effect stability, rate surveyed into high, can not only measure exactly liquid steel level height, also can accurately measure thickness of slag layer.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of revolving furnace sublance liquid level measuring system that Fig. 1 provides for the embodiment of the present invention;
The connection diagram of combined type probe in a kind of revolving furnace sublance liquid level measuring system that Fig. 2 provides for the embodiment of the present invention;
The structured flowchart of signal processor in a kind of revolving furnace sublance liquid level measuring system that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is according to feedback voltage and moves the graph of relation of highly drawing out voltage-height.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Main purpose of the present invention is, the sublance that overcomes prior art is surveyed the limitation that level probe exists, and provide a kind of new revolving furnace sublance liquid level measuring system, technical problem to be solved is the measurement molten steel liquid level function that makes it have height and survey into rate, also can accurately determine liquid level thickness of slag layer, thereby be more suitable for practicality simultaneously.
The structural representation of a kind of revolving furnace sublance liquid level measuring system that Fig. 1 provides for the embodiment of the present invention, as shown in Figure 1, a kind of revolving furnace sublance liquid level measuring system provided by the invention specifically comprise sublance 1, the compensating lead wire 2 that is connected with described sublance, signal processor 3, the lifting motor 4 and the programmable logic controller PLC5 that are connected with described sublance;
Described sublance 1, the feedback voltage when inserting converter in Real-time Collection burner hearth, and by described compensating lead wire 2, described feedback voltage is sent to described signal processor 3;
Described lifting motor 4, inside is provided with encoder 41, inserts the operation height of converter for the combined type probe 12 described in Real-time Collection;
Described PLC5, for being highly sent to described operation described signal processor 3;
Described signal processor 3, for determining height and the thickness of slag layer of molten metal pool level according to described operation height and described feedback voltage.
The connection diagram of combined type probe in a kind of revolving furnace sublance liquid level measuring system that Fig. 2 provides for the embodiment of the present invention, as seen from Figure 1, Figure 2, described sublance 1 specifically comprises rifle body 11 and combined type probe 12, wherein, described combined type probe 12 comprises outer tube 121, signal output inserter 122, is arranged on iron core 123 and coil 124 in described outer tube 121, and described coil 124 is wound around described iron core 123 and is connected with described signal output inserter 122.
In other embodiments of the present invention, described coil 124 surfaces can scribble insulation layer, more specifically, described coil 124 can be copper cash, form iron-core coil, its axis is parallel to the medullary ray of combined type probe, and iron core and coil are fixed on the inner chamber end of auxiliary lance probe outer tube 121, in concrete embodiment, can be bonded on the inwall of outer tube 11 by cement.
The structured flowchart of signal processor in a kind of revolving furnace sublance liquid level measuring system that Fig. 3 provides for the embodiment of the present invention, as shown in Figure 3, described signal processing implement body comprises:
Curve plotting unit 301, for drawing voltage-altitude curve according to described operation height and described feedback voltage;
Transition point determining unit 302, for analyzing described voltage-altitude curve, determines transition point.
Molten metal pool level height determining unit 303, for determining the height of described molten metal pool level according to described transition point.
Thickness of slag layer determining unit 304, for determining thickness of slag layer according to described transition point.
For converter, in converter burner hearth, atmosphere is respectively gas cloud, slag blanket and molten steel layer from top to bottom.In the time that auxiliary lance probe declines in air, the feedback voltage now gathering, close to a steady state value, is made as A.In the time that the combined type probe of sublance enters slag blanket region by gas cloud, will there is transition in feedback voltage, and the operation of establishing is now highly H
1, in the time that combined type probe enters slag blanket region and declines in slag blanket region, feedback voltage numerical value remains unchanged substantially, and establishing combined type probe is B at the feedback voltage in slag blanket region.In the time that combined type probe enters into molten steel layer by slag blanket, feedback voltage there will be transition for the second time, and the operation of establishing is now highly H
2, in the time that combined type probe enters molten steel region and declines in molten steel region, now the numerical value of corresponding feedback voltage remains unchanged substantially, is made as C.Therefore, highly can draw voltage-altitude curve according to feedback voltage and operation, and determine by analytical voltage-altitude curve the transition point that transition occurs.Can determine molten metal pool level height and thickness of slag layer according to transition point.In this embodiment, molten metal pool level height is H
2, thickness of slag layer is H
1-H
2.
In other embodiments of the present invention, described revolving furnace sublance liquid level measuring system also comprises the display unit 6 being connected with described signal processor 3, for showing in real time and store height and the thickness of slag layer of described feedback voltage, operation height, molten metal pool level.In concrete practical application, described display unit 6 can realize by other equipment with storage and Presentation Function, such as computer.So, can be by height and the thickness of slag layer of the molten metal pool level of display unit real time inspection different times.
Below in conjunction with specific embodiment, introduce in detail a kind of revolving furnace sublance liquid level measuring system provided by the invention.In specific embodiment, measure sublance liquid level, also need the equipment being equipped with to have the complete sublance installations and facilities such as sublance jacking system, sublance horizontal displacement and probe disassembly system, sublance jacking system is responsible for sublance and probe lifting action makes probe insert, leave molten bath, horizontal displacement system is responsible for sublance and probe to move to handling position, utilizes probe attaching/detaching apparatus to complete the replacing operation of auxiliary lance probe in handling position.This level measurement probe is equivalent to perfect to original sublance system function, so only simply described the work relationship of former sublance system and auxiliary lance probe herein.
Revolving furnace sublance liquid level measuring system provided by the invention, working process is in this embodiment as follows:
1,, when sublance starts surveying work, combined type probe enters to converter burner hearth interpolation with sublance;
2,, in the time that combined type probe declines in air, the feedback voltage value of combined type probe is a steady state value.
3, when combined type probe leaves gas cloud and enters slag blanket region, to there is transition in feedback voltage, the operation that now promotes motor collection sublance is highly 8.710 meters, and the numerical value transition of feedback voltage reduces, when combined type probe declines in slag blanket region afterwards, this numerical value remains unchanged substantially.
4, in the time that combined type probe enters into molten steel by slag blanket, to there is transition for the second time in feedback voltage value, the operation that now promotes motor collection sublance is highly 8.290 meters, the numerical value of feedback voltage again transition reduces, combined type probe moves in molten steel afterwards, feedback voltage remains unchanged substantially, until sublance starts to promote.
5, sublance is sent to signal processor unit by compensating lead wire by feedback voltage, signal processor unit is when continuous recording feedback voltage changes, also record the operation height of sublance by PLC, thereby highly draw out the graph of relation of voltage-height according to feedback voltage and operation, as shown in Figure 4.
6, signal processor unit is analyzed the graphic representation in Fig. 4 automatically, determine the position of twice transition point appearance, be respectively the transition point one shown in Fig. 4 and transition point two, show that according to this transition point molten metal pool level height is 8.290 meters, thickness of slag layer is 0.420 meter.
7, molten metal pool level height and thickness of slag layer are sent to display unit is computer to signal processor unit, is stored and is shown by computer.
From above-mentioned measuring result, the measuring process that this carries out, verify a kind of revolving furnace sublance liquid level measuring system provided by the invention, strong adaptability, can measure accurately converter molten pool thickness of slag layer, liquid steel level height, and measure success ratio can reach more than 90%, be conducive to improve steel-making efficiency, reduce costs, energy-saving and cost-reducing.In addition, combined type in revolving furnace sublance liquid level measuring system of the present invention probe also can be integrated into respectively thermometric sampling and determine that carbon TSC, thermometric sampling determine oxygen TSO, thermometric samples in the combined probes such as TS, to meet steel mill's technique needs.
Therefore, a kind of revolving furnace sublance liquid level measuring system provided by the invention, by iron-core coil being integrated in sublance Compound transducer, compared with surveying level probe with electrode type of the prior art/determine oxygen type, not only having solved electrode type of the prior art/determine oxygen type surveys level probe and measures the low technical problem of success ratio, and be conducive to improve steel-making efficiency, reduce costs, energy-saving and cost-reducing, effect stability, survey into rate high, can not only measure exactly liquid steel level height, also can accurately measure thickness of slag layer.
In addition, a kind of revolving furnace sublance liquid level measuring system provided by the invention, can be integrated in various types of sublance Compound transducers, strong adaptability, can measure accurately converter molten pool thickness of slag layer, liquid steel level height, and measure success ratio can reach more than 90%, be conducive to improve steel-making efficiency, reduce costs, energy-saving and cost-reducing.
In sum, a kind of revolving furnace sublance liquid level measuring system provided by the invention, has following technique effect:
(1) revolving furnace sublance liquid level measuring system effect stability of the present invention, surveys into rate high, can not only measure exactly liquid steel level height, also can accurately measure thickness of slag layer;
(2) revolving furnace sublance liquid level measuring system of the present invention, to molten steel face and thickness of slag layer observed value accurate stable, is conducive to operator and grasps converter lining situation, safeguards in time furnace lining, improves converter production efficiency;
(3) revolving furnace sublance liquid level measuring system wide adaptability of the present invention, can with various sublance composite probe set, to meet smelting demand.
In the present invention, applied specific embodiment principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (7)
1. a revolving furnace sublance liquid level measuring system, is characterized in that, described revolving furnace sublance liquid level measuring system specifically comprises:
Sublance (1);
The compensating lead wire (2) being connected with described sublance;
The signal processor (3) being connected with described compensating lead wire (2);
The lifting motor (4) being connected with described sublance;
The programmable logic controller PLC(5 being connected with described signal processor (3));
Wherein, described sublance (1), comprise rifle body (11) and combined type probe (12), described combined type probe (12) comprises outer tube (121), signal output inserter (122), be arranged on iron core (123) and coil (124) in described outer tube (121), described coil (124) is wound around described iron core (123) and is connected with described signal output inserter (122), described sublance (1) is the feedback voltage in Real-time Collection burner hearth when inserting converter, and by described compensating lead wire (2), described feedback voltage is sent to described signal processor (3),
Described lifting motor (4), inside is provided with encoder (41), inserts the operation height of converter for the combined type probe (12) described in Real-time Collection;
Described PLC(5), for described operation being highly sent to described signal processor (3);
Described signal processor (3), for determining height and the thickness of slag layer of molten metal pool level according to described operation height and described feedback voltage.
2. revolving furnace sublance liquid level measuring system according to claim 1, is characterized in that, described coil (124) and described iron core (123) are fixed on the inwall of described outer tube (121).
3. revolving furnace sublance liquid level measuring system according to claim 1, is characterized in that, described coil (124) surface scribbles insulation layer.
4. revolving furnace sublance liquid level measuring system according to claim 3, is characterized in that, described coil (124) is copper cash.
5. revolving furnace sublance liquid level measuring system according to claim 1, it is characterized in that, described revolving furnace sublance liquid level measuring system also comprises the display unit (6) being connected with described signal processor (3), for showing in real time and store height and the thickness of slag layer of described feedback voltage, operation height, molten metal pool level.
6. revolving furnace sublance liquid level measuring system according to claim 5, is characterized in that, described display unit (6) is computer.
7. revolving furnace sublance liquid level measuring system according to claim 1, is characterized in that, described signal processing implement body comprises:
Curve plotting unit, for drawing voltage-altitude curve according to described operation height and described feedback voltage;
Transition point determining unit, for analyzing described voltage-altitude curve, determines transition point;
Molten metal pool level height determining unit, for determining the height of described molten metal pool level according to described transition point;
Thickness of slag layer determining unit, for determining thickness of slag layer according to described transition point.
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| CN201310030200.7A CN103045795B (en) | 2013-01-25 | 2013-01-25 | Liquid level measurement system of converter sublance |
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| CN201310030200.7A CN103045795B (en) | 2013-01-25 | 2013-01-25 | Liquid level measurement system of converter sublance |
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| CN103045795B true CN103045795B (en) | 2014-05-14 |
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| CN103290165A (en) * | 2013-06-11 | 2013-09-11 | 鞍钢股份有限公司 | Method for measuring distance between oxygen lance spray head and molten steel surface |
| CN111485056A (en) * | 2020-04-29 | 2020-08-04 | 河钢乐亭钢铁有限公司 | Method for measuring thickness of converter slag layer on line |
| CN112649065A (en) * | 2020-12-22 | 2021-04-13 | 上海海能信息科技有限公司 | Method and device for acquiring liquid level value based on metallurgical eddy current liquid level signal |
| CN115198097B (en) * | 2022-07-14 | 2024-03-26 | 云南铜业股份有限公司西南铜业分公司 | Automatic adjustment system and automatic adjustment method for insertion depth of reducing oil gun |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS61174307A (en) * | 1985-01-28 | 1986-08-06 | Nippon Kokan Kk <Nkk> | Converter steel making method |
| KR100399238B1 (en) * | 2001-02-02 | 2003-09-22 | 주식회사 우진 | Sub lance combinations probe and thereof measuring method for converter |
| KR100418983B1 (en) * | 2002-05-29 | 2004-02-14 | 주식회사 포스코 | Probe binder for sub lance of converter |
| CN201089774Y (en) * | 2007-07-24 | 2008-07-23 | 黄永进 | Composite probe for five-functional convertor auxiliary gun |
| CN101993970B (en) * | 2009-08-25 | 2012-09-26 | 鞍钢股份有限公司 | Device and method for detecting and controlling slag state of converter |
| KR101249440B1 (en) * | 2010-12-29 | 2013-04-03 | 우진 일렉트로나이트(주) | A probe holder preventing slag attachment |
| KR20120115747A (en) * | 2011-04-11 | 2012-10-19 | 주식회사 우진 | Measurement with the instrument of the molten steel in the converter |
| CN202246735U (en) * | 2011-10-08 | 2012-05-30 | 宋立强 | Intelligent detecting device for liquid surface of converter steel water |
| CN202359148U (en) * | 2011-11-24 | 2012-08-01 | 中冶京诚工程技术有限公司 | Sublance system |
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