KR20160073017A - Apparatus for monitoring temperature of ladle - Google Patents

Apparatus for monitoring temperature of ladle Download PDF

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Publication number
KR20160073017A
KR20160073017A KR1020140181280A KR20140181280A KR20160073017A KR 20160073017 A KR20160073017 A KR 20160073017A KR 1020140181280 A KR1020140181280 A KR 1020140181280A KR 20140181280 A KR20140181280 A KR 20140181280A KR 20160073017 A KR20160073017 A KR 20160073017A
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KR
South Korea
Prior art keywords
temperature
ladle
molten steel
thermocouple
refractory
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Application number
KR1020140181280A
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Korean (ko)
Inventor
이완식
Original Assignee
주식회사 포스코
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Priority to KR1020140181280A priority Critical patent/KR20160073017A/en
Publication of KR20160073017A publication Critical patent/KR20160073017A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

Disclosed is a device to monitor a temperature of a ladle, capable of indirectly measuring a temperature of molten steel in the ladle, and checking a state of a bottom of the ladle. According to the embodiment of the present invention, the device to monitor the temperature of the ladle which monitors the temperature of the ladle in which a permanent unit, a semi-permanent unit, and a fireproof softening unit are built in order on an inner side of a steel cover, comprises: a temperature sensing unit installed in the semi-permanent unit arranged on the bottom of the ladle, sensing a change in temperature of the fireproof softening unit coming in contact with the molten steel by being installed in the bottom of the ladle; a control unit determining a temperature of the molten steel based on a temperature sensing result with the fireproof softening unit transmitted by the temperature sensing unit; and a display unit displaying temperature information on the molten steel, which is determined by the control unit, onto a screen.

Description

[0001] APPARATUS FOR MONITORING TEMPERATURE OF LADLE [0002]

The present invention relates to a ladle temperature monitoring apparatus, and more particularly, to a device for measuring the temperature of ladle containing molten steel in a continuous casting process.

In general, the continuous casting process refers to a casting method in which molten steel is continuously injected into a mold having a predetermined shape, and the semi-solidified casting product is continuously drawn downward from the casting mold to produce a semi-finished product having various shapes .

During the continuous casting process, the molten steel processed in the refining process is received by a ladle and carried to the next process, which is a container for containing molten steel in the process of producing steel or non-ferrous metals.

Here, various methods for measuring the molten steel temperature of the ladle have been proposed since it is difficult to obtain high-quality cast products if the molten steel temperature stored in the ladle can not be accurately measured.

As a method for measuring the temperature of molten steel in the ladle, an automatic sampling device for measuring the temperature of the molten steel by penetrating the probe into the molten steel is used. However, according to the solidification state of the molten steel in the ladle, The temperature can not be measured, and there is a problem of operation delay due to the method of using the probe.

Therefore, in order to solve such a problem, Japanese Unexamined Patent Application Publication No. 2008-0032331 discloses a continuous measuring device using a temperature sensor installed in direct contact with molten steel through the upper side of the ladle.

However, the temperature sensor which directly contacts the molten steel through the upper side of the ladle requires an expensive heat insulating structure for preventing the damage due to the high temperature molten steel temperature, and since the molten steel temperature at the upper portion of the ladle is measured, It is difficult to accurately determine whether or not the ladle bottom is solidified due to the temperature difference between the upper portion and the lower portion of the molten steel.

Open Patent Publication No. 2008-0032331 (published April 15, 2008)

Embodiments of the present invention are intended to provide a ladle temperature monitoring apparatus capable of indirectly measuring the molten steel temperature in the ladle and recognizing the ladle floor condition.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a ladle temperature monitoring apparatus for monitoring the temperature of ladle sequentially formed with a permanent field, a quasi-ridged field, and an anti-fire softening inside iron piles, A temperature sensing unit disposed at a bottom of the ladle for sensing a temperature change of the refractory steel in contact with the molten steel; and a temperature sensing unit for sensing the temperature of the refractory steel, There is provided a ladle temperature monitoring apparatus including a control unit for determining a temperature of molten steel and a display unit for displaying temperature information of the molten steel determined by the control unit on a screen.

Also, the controller may determine the floor condition information of the ladle based on the determined temperature of the molten steel, and output the determined floor condition information to the display unit.

The temperature sensing unit may include a thermocouple disposed in the sensor mounting groove formed in the quasi-ballet ballast, and a compensating wire having one end connected to the thermocouple to transmit thermoelectric power sensed by the thermocouple.

The temperature sensing unit may further include a heat terminal member for supporting a lower side of the thermocouple to block heat transmitted from the iron wire to the thermocouple.

The compensating conductor may be connected to the thermoelectric transducer after the other end of the compensating conductor extends through the permanent sheet and the scrim.

Further, the temperature sensing unit may further include a connector that is partially exposed to the outside of the wire, and the other end of the compensation wire may be connected to the connector through the permanent wire.

The floor condition information includes whether or not the gas injection nozzle for stirring the molten steel is clogged.

According to another aspect of the present invention, there is provided a refractory steel comprising: a thermocouple installed inside a refractory adjacent to an inner refractory disposed in a bottom of a ladle to contact molten steel, the thermocouple detecting a temperature change of the refractory; The temperature of the molten steel is determined based on a temperature value between the refractory wire having one end connected to the thermocouple and the other end connected to the thermoelectric temperature transducer through the metal foil of the ladle and the refractory steel transferred through the thermoelectric temperature transducer, And a computer for outputting the determined molten steel temperature information may be provided.

The embodiments of the present invention can indirectly measure the temperature of the molten steel accommodated in the ladle by sensing the temperature of the ladle bottom refractory and thereby reduce the damage of the thermocouple measuring the high temperature molten steel temperature.

In addition, embodiments of the present invention can detect the change in the material and temperature of the molten steel in real time by sensing the temperature of the ladle bottom, so that whether the gas injection nozzle for bubbling the molten steel, The reliability of the work can be improved.

FIG. 1 shows a monitoring apparatus installed in a ladle according to an embodiment of the present invention.
2 is a control block diagram of a monitoring apparatus according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a portion in which a temperature sensing unit according to an embodiment of the present invention is installed.
4 illustrates a connection structure of a temperature sensing unit according to another embodiment of the present invention.
FIG. 5 illustrates a position where the temperature sensing unit is disposed according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

Also, terms including ordinals such as " first, " " second, " and the like can be used to describe various elements, but the elements are not limited by terms. Terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terms used in the present application are used to illustrate the embodiments and are not intended to limit or limit the invention, and the singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprise", "comprising", and the like are intended to specify the presence of stated features, integers, steps, components, or combinations thereof, and may include one or more other features, Steps, elements, or combinations thereof, as a matter of convenience, without departing from the spirit and scope of the invention. Also, when a part is referred to as being "connected" to another part, it includes not only a direct connection but also an indirect connection between the other parts.

2 is a control block diagram of a monitoring apparatus according to an embodiment of the present invention. FIG. 3 is a block diagram of a monitoring apparatus according to an embodiment of the present invention. Fig.

1 and 2, a monitoring apparatus 10 according to an embodiment of the present invention includes a temperature sensing unit 20, a control unit 40, a storage unit 50, and a display unit 60. Here, the control unit 40, the storage unit 50, and the display unit 60 may be constituted by one computer 30.

The temperature sensing part 20 indirectly senses the molten steel temperature in the ladle 70 through a change in the temperature of the bottom refractory of the ladle 70. The temperature sensing part 20 includes a thermocouple 70 installed inside the refractory forming the bottom of the ladle 70, (21).

3, the bottom of the ladle 70 is made up of a metal foil 71 forming an outer appearance, a permanent field 72, a quasi-ball stadium 73, The thermocouple 21 forms the bottom of the ladle 70 and is disposed on the bottom of the ladle 70 to sense the temperature change of the refractory 74 in contact with the molten steel. And may be installed in the sensor installation groove 75 formed in the ball field 73.

Temperature contact of the thermocouple 21 installed in the sensor mounting groove 75 is arranged to be in contact with the refractory contact 74 to sense the temperature change of the refractory 74 and the thermoelectric power of the thermocouple 21 is compensated 23 to the thermoelectric temperature transducer 25.

1 and 3, one end of the compensating wire 23 is connected to the thermocouple 21 and the other end of the compensating wire 23 is connected to the outside of the ladle 70 through the permanent sheet 72 and the wire 71, And may be connected to thermoelectric temperature transducer 25 after being extended. The thermoelectric power of the thermocouple 21 may be converted to a temperature value through the thermoelectric transducer 25 and then transmitted to the controller 40.

4, the other end of the compensating wire 23 connected to the thermocouple 21 is connected to the first connector 27, which is partially exposed to the outside of the wire 71, 1 < / RTI > connector 27 via a second connector 28 connected to the thermoelectric temperature transducer 25. The thermoelectric transducer 25 may be connected to the thermoelectric transducer 25 via a second connector 28,

The bottom of the ladle 70 is provided with a gas injection nozzle 70 for injecting an inert gas for molten steel bubbling to uniformize the temperature of the molten steel in the ladle 70 while heating the molten steel contained in the ladle 70, And the gas injection nozzle 76 may be connected to a pipe 81 for transferring the inert gas supplied from the gas supply unit 80. [ The pipe 81 may be provided with a plurality of valves 83 for controlling the flow rate of the inert gas supplied from the gas supply unit 80.

The temperature sensing unit 20 may further include a heat terminal member 90 for preventing a measurement error of the thermocouple 21 installed in the sensor mounting groove 75.

The heat block member 90 is installed in the sensor mounting groove 75 so as to support the lower side of the thermocouple 21 and prevents heat transmitted from the heat block 71 from being transmitted to the thermocouple 21 through the permanent field 72 do.

The heat block member 90 may be composed of at least one heat insulating material such as ceramic fiber, carbon fiber and inconel which can be used as a high temperature heat insulating material having a high heat resistance and a high melting point. Heat generated from the heat insulating material 71 to the thermocouple 21 It is possible to improve the temperature sensing reliability of the refractory steel 74 through the thermocouple 21. [

The control unit 40 determines the temperature of the molten steel based on the temperature sensing result of the internal combustion engine 74 sensed by the temperature sensing unit 20.

The control unit 40 receives the temperature value of the internal combustion engine 74 calculated by the thermoelectric temperature transducer 25 and can calculate the temperature of the molten steel using the information stored in the storage unit 50, So that the temperature information can be controlled to be output through the display unit 60.

The temperature data base 51 in which the temperature value of the molten steel corresponding to the temperature value of the refractory seawater 74 is set may be stored in advance in the storage unit 50. The control unit 40 controls the transmission The temperature value of the molten steel corresponding to the temperature value of the internal combustion engine 74 can be retrieved from the temperature database 51 stored in the storage unit 50 and output to the display unit 60. [ Here, the temperature database 51 may be a data value calculated by experiments.

The control unit 40 can also determine the floor condition information of the ladle 70 based on the temperature of the molten steel and control the display unit 60 to output the floor condition information of the determined ladle 70.

For this, the reference temperature value for determining the floor condition information of the ladle 70 may be stored in the storage unit 50, and the control unit 40 may store the reference temperature value of the molten steel calculated from the reference temperature value stored in the storage unit 50 When it is determined that the temperature is low, the molten steel is solidified at the bottom of the ladle 70, and a warning message of the bottom condition information that the gas injection nozzle 76 installed at the bottom of the ladle 70 can be clogged for stirring the molten steel is displayed on the display unit 60 .

The controller 40 may be implemented by a processor or a controller such as a CPU (Central Processor Unit), an MCU (Micro Controller Unit), and an MPU (Micro Processor Unit), and the storage unit 50 may include a ROM, An optical memory such as an IC memory such as a RAM and a flash memory, a magnetic memory such as a hard disk and a diskette drive, and an optical disk. The display unit 60 may include a liquid crystal display (LCD) or the like for performing a function of outputting information corresponding to a user request, including various function menus executed by the monitoring apparatus 10, on the screen under the control of the control unit 40 A touch screen can be used.

The ladle temperature monitoring apparatus 10 according to the present embodiment measures the temperature of the molten steel accommodated in the ladle 70 by indirectly measuring the temperature of the refractory of the ladle 70, It is possible to reduce the damage of the thermocouple.

The ladle temperature monitoring apparatus 10 according to the present embodiment can detect the change of the material and the temperature of the molten steel in real time in accordance with the solidification of the molten steel at the bottom of the ladle 70 The operator can recognize in advance whether or not the gas injection nozzle 76 for bubbling the molten steel provided at the bottom of the ladle 70 is clogged so that the reliability of the operation can be improved.

In the embodiment of the present invention, only one temperature sensing unit 20 is installed at the bottom of the ladle 70. However, as shown in FIG. 5, the number of the temperature sensing units 20 It is needless to say that a plurality of the light emitting elements may be disposed.

In the embodiment of the present invention, the permanent structure 72, the quasi-spherical ground 73 and the refractory fins 74 are sequentially formed on the bottom of the ladle 70 in the inside of the fiber 71, The heat sink 72 and the quasi-arc ballast 73 may be formed of one bottom refractory material as required. In this case, the thermocouple 21 may be installed in one bottom refractory material.

The foregoing has shown and described specific embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

10: Monitoring device, 20: Temperature sensing part,
21: thermocouple, 23: compensating conductor,
25: Thermoelectric temperature transducer, 27,28: Connector,
30: computer, 40: control unit,
50: storage unit, 60: display unit,
70: ladle, 71: iron,
72: Permanent chapter, 73: Junyoung Park,
74: My stomach, 75: Sensor installation groove,
76: gas injection nozzle, 80: gas supply part,
90: Thermal end member.

Claims (8)

1. A ladle temperature monitoring apparatus for monitoring the temperature of ladle in which a permanent field, a quasi-
A temperature sensing unit disposed in the bottom of the ladle and disposed at the bottom of the ladle to sense a temperature change with the refractory steel in contact with the molten steel;
A control unit for determining the temperature of the molten steel based on the temperature sensing result with the refractory steel transferred by the temperature sensing unit; And
And a display unit for displaying temperature information of the molten steel determined by the control unit on a screen. The method according to claim 1,
Wherein the control unit determines the floor condition information of the ladle based on the determined temperature of the molten steel and controls the display unit to output the determined floor condition information to the display unit. The method according to claim 1,
Wherein the temperature sensing unit includes a thermocouple disposed in a sensor mounting groove formed in the quasi-ballistic ballast, and a compensation wire having one end connected to the thermocouple to transmit thermoelectric power sensed by the thermocouple. The method of claim 3,
Wherein the temperature sensing unit further includes a heat terminal member for supporting a lower side of the thermocouple to block heat transmitted from the iron fat to the thermocouple. The method of claim 3,
Wherein the compensating conductor is extended through the other end of the permanent conductor and the foil and then connected to the thermoelectric temperature transducer. The method of claim 3,
Wherein the temperature sensing unit further includes a connector that is partially exposed to the outside of the metal foil,
Wherein the compensating conductor is connected to the connector at the other end through the permanent conductor. 3. The method of claim 2,
Wherein the floor condition information includes whether the gas injection nozzle is blocked for molten steel agitation. A thermocouple installed within the refractory adjacent to the refractory located in the bottom of the ladle to contact the molten steel and sensing a temperature change with the refractory;
A compensation wire having one end connected to the thermocouple to transmit the thermoelectric power sensed by the thermocouple and the other end connected to the thermoelectric temperature transducer through the scoop of the ladle; And
And a computer for determining the temperature of the molten steel based on the temperature value of the refractory steel transferred through the thermoelectric temperature transducer and outputting the determined molten steel temperature information.
KR1020140181280A 2014-12-16 2014-12-16 Apparatus for monitoring temperature of ladle KR20160073017A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106899236A (en) * 2017-04-13 2017-06-27 东北大学 A kind of thermoelectric generating device of utilization ladle surface waste heat
KR20190016801A (en) * 2017-08-09 2019-02-19 주식회사 포스코 Apparatus and method for measuring temperature
KR20200036556A (en) 2018-09-28 2020-04-07 주식회사 포스코 Transport apparatus and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080032331A (en) 2006-10-09 2008-04-15 주식회사 포스코 Apparatus for measuring realtime temperature of continuous in steel manufacture ladle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080032331A (en) 2006-10-09 2008-04-15 주식회사 포스코 Apparatus for measuring realtime temperature of continuous in steel manufacture ladle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106899236A (en) * 2017-04-13 2017-06-27 东北大学 A kind of thermoelectric generating device of utilization ladle surface waste heat
CN106899236B (en) * 2017-04-13 2018-11-27 东北大学 A kind of thermoelectric generating device using ladle surface waste heat
KR20190016801A (en) * 2017-08-09 2019-02-19 주식회사 포스코 Apparatus and method for measuring temperature
KR20200036556A (en) 2018-09-28 2020-04-07 주식회사 포스코 Transport apparatus and method

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