CN112059127A - Continuous temperature measuring device for tundish molten steel - Google Patents
Continuous temperature measuring device for tundish molten steel Download PDFInfo
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- CN112059127A CN112059127A CN201910499572.1A CN201910499572A CN112059127A CN 112059127 A CN112059127 A CN 112059127A CN 201910499572 A CN201910499572 A CN 201910499572A CN 112059127 A CN112059127 A CN 112059127A
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- temperature measuring
- tundish
- temperature
- weir plate
- molten steel
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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
- B22D2/006—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the molten metal
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a continuous temperature measuring device for tundish molten steel, which comprises a tundish, a long nozzle connected to the top of the tundish, an immersed nozzle connected to the bottom of the tundish, and a temperature measuring weir plate arranged in the tundish, wherein the tundish is divided into a mixing zone and a casting zone, the long nozzle is arranged in the mixing zone, and the immersed nozzle is arranged in the casting zone; the temperature measuring weir plate comprises a weir plate refractory body, wherein a temperature measuring hole is formed in the weir plate refractory body, a temperature measuring refractory protective sleeve is arranged in the temperature measuring hole, a temperature measuring thermocouple is arranged in the temperature measuring refractory protective sleeve, and the temperature measuring thermocouple is connected with a temperature signal acquisition device through a temperature signal line. The invention solves the problem that the temperature measuring probe can not continuously detect the temperature of the molten steel, and simultaneously solves the problems of low service life and high temperature measuring cost of the temperature measuring probe.
Description
Technical Field
The invention relates to the technical field of tundish metallurgy, in particular to a continuous temperature measuring device for molten steel in a tundish.
Background
The tundish is one of important intermediate links of a steelmaking production flow, molten steel in a ladle is injected into the tundish through a long nozzle arranged at the upper part of the tundish, and the molten steel is injected into a crystallizer through a submerged nozzle arranged at the bottom of the tundish after flowing through the tundish. The stability of the temperature field, the flow field and the liquid level height of the molten steel in the tundish plays a crucial role in the final quality. The temperature of the molten steel in the tundish is measured by a temperature measuring device.
At present, the temperature measurement method of tundish molten steel mainly comprises two methods: one is to use a temperature measuring probe and a disposable consumption type thermocouple, the working principle is to use the temperature difference generated at two ends of the thermocouple to electrically and thermally measure the temperature of molten steel according to the thermoelectric effect of metal, the structure is composed of a temperature measuring thermocouple head and a large paper tube, and the temperature of molten steel at a certain moment is measured by directly immersing the molten steel in a region to be measured during temperature measurement. The other is a continuous temperature measuring device, which adopts a thermocouple for continuous temperature measurement, for example, Chinese patent application No. 201510515183.5 discloses a tundish continuous temperature measuring device, which generally comprises a thermocouple, a refractory material protection tube and a temperature signal detection device, wherein during temperature measurement, a refractory material protection sleeve provided with the thermocouple extends into molten steel in a temperature measurement area to continuously detect the temperature of the molten steel.
However, the two temperature measurement methods mainly have the following disadvantages:
1) the temperature measuring probes can only test the temperature of molten steel at a certain time point, generally, the temperature of four time points is required to be tested when a furnace of steel is poured, the probes need to be stretched into the molten steel from the opening of the ladle cover by manpower or a robot hand for each temperature measurement, and four temperature measuring probes are consumed by each furnace of steel, so that the production cost is increased, and the labor intensity of operators is increased;
2) the continuous temperature measuring device for the tundish disclosed by the Chinese patent application No. 201510515183.5 is characterized in that a thermocouple is installed in a refractory protective sleeve and is directly inserted into molten steel of the tundish to measure the temperature, the erosion of a slag layer on the surface of the molten steel of the tundish to the refractory is very quick, the number of continuous casting furnaces of the tundish is more than 6-10, one furnace of molten steel is cast for 50 minutes, the temperature measuring device needs to continuously work in the high-temperature molten steel for more than 300 minutes, and the refractory protective sleeve can be guaranteed not to be eroded and damaged by the molten steel only if the refractory protective sleeve needs to be made very thick. The thicker refractory casing pipe is manufactured, so that the manufacturing cost and the installation difficulty are increased, and the flow field of the middle molten steel can be interfered when the thicker refractory casing pipe is immersed into the molten steel, so that the normal metallurgical effect of the tundish is influenced. After the temperature measuring device measures a continuous casting heat, the refractory casing can be seriously corroded and cannot be reused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a continuous temperature measuring device for tundish molten steel, which solves the problem that a temperature measuring probe cannot continuously detect the temperature of the molten steel and also solves the problems of low service life and high temperature measuring cost of the temperature measuring probe.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a continuous temperature measuring device of middle package molten steel, includes the middle package, links to the long mouth of a river at middle package top, and links to the immersion nozzle of middle bottom, its characterized in that: the tundish is divided into a mixing zone and a casting zone by a temperature measuring weir plate arranged in the tundish, the long water gap is arranged in the mixing zone, and the submerged water gap is arranged in the casting zone;
the temperature measuring weir plate comprises a weir plate refractory body, wherein a temperature measuring hole is formed in the weir plate refractory body, a temperature measuring refractory protective sleeve is arranged in the temperature measuring hole, a temperature measuring thermocouple is arranged in the temperature measuring refractory protective sleeve, and the temperature measuring thermocouple is connected with a temperature signal acquisition device through a temperature signal line.
The top of the temperature measuring hole is communicated with the top of the weir plate refractory body, and the distance between the bottom of the temperature measuring hole and the bottom of the weir plate refractory body is 10-20 mm.
The bottom of the weir plate refractory body is provided with a steel through hole, and the distance between the top of the steel through hole and the bottom of the temperature measuring hole is 10-20 mm.
And a dam is arranged between the weir plate refractory body and the submerged nozzle.
The weir plate refractory body is made of magnesium or aluminum-silicon refractory, and the thickness of the weir plate refractory body is more than 100mm, preferably more than 120 mm.
The diameter of the temperature measuring hole is 10 mm-30 mm, and the distance between the inner wall and the outer wall of the temperature measuring hole is more than 40 mm.
The temperature measurement is resistant material protective case and is made for the corundum material, and its top link up with the resistant material body top of weir plate, and temperature measurement is resistant material protective case bottom thick is 5 ~ 10mm, and the internal diameter is 2 ~ 5mm, and the external diameter is 10 ~ 20mm, and the wall thickness is 4 ~ 8 mm.
The outer wall of the temperature-measuring refractory protective sleeve is wrapped with a heat-insulating fiber layer.
The temperature thermocouple is an S-type thermocouple, and a B-type platinum rhodium thermocouple is more preferable.
The tundish comprises a tundish shell and a tundish refractory layer laid on the inner wall of the tundish shell.
In the technical scheme, the continuous temperature measuring device for the tundish molten steel, provided by the invention, has the following beneficial effects:
1) the continuous temperature measuring device can continuously and accurately detect the temperature of the molten steel in the tundish in the pouring production process of the tundish;
2) the temperature thermocouple of the continuous temperature measuring device is arranged in the temperature measuring hole, so that the melting loss caused by molten steel erosion, particularly the melting loss of the signal line position, can be effectively prevented, and the temperature thermocouple can be taken out for reuse after pouring of the tundish, so that the temperature measuring cost of the tundish is reduced;
3) the continuous temperature measuring device does not interfere the whole flow field of the tundish, so that the whole stability of the flow field of the tundish is ensured;
4) the continuous temperature measuring device can be reused after measuring a continuous casting heat;
5) the temperature measuring weir plate of the continuous temperature measuring device is arranged in the tundish when the tundish is built, and can detect the temperature of the atmosphere in the tundish in real time when the tundish is baked, thereby effectively ensuring the baking effect of the tundish.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of a continuous temperature measurement device according to the present invention;
FIG. 2 is a longitudinal cross-sectional view of the temperature measuring weir plate of FIG. 1;
FIG. 3 is a schematic structural diagram of a second continuous temperature measuring device according to an embodiment of the present invention;
fig. 4 to 3 are longitudinal sectional views of the temperature measuring weir plate.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 1 and 2, a first embodiment of a continuous temperature measuring device for tundish molten steel according to the present invention includes:
the tundish 1 comprises a tundish refractory layer 2 and a tundish shell 3, a long nozzle 4 is installed at the top of the tundish 1, an immersion nozzle 5 is installed at the bottom of the tundish 1, a temperature measuring weir plate 6 is installed at the middle position of the tundish 1, and a dam 7 is installed between the temperature measuring weir plate 6 and the immersion nozzle 5. The temperature measurement weir plate 6 is installed in 1 middle part position of middle package, includes: the weir plate refractory body 61 is internally provided with a temperature measuring hole 62, a temperature measuring refractory protective sleeve 63 is arranged in the temperature measuring hole 62, a temperature measuring thermocouple 64 is arranged in the temperature measuring refractory protective sleeve 63, and the temperature measuring thermocouple 64 is connected with a temperature signal acquisition device 66 through a temperature signal line 65.
The weir plate refractory body 61 is made of magnesium refractory, the thickness of the weir plate refractory body 61 is 100mm, a steel gap is reserved between the bottom of the temperature measuring weir plate 6 and the bottom of the tundish 1, a temperature measuring hole 62 is formed in the center of the top of the weir plate refractory body 61, the diameter of the temperature measuring hole 62 is 15mm, the temperature measuring hole 62 is through at the top of the temperature measuring weir plate 6, and the distance from the bottom of the temperature measuring hole 62 to the bottom of the temperature measuring weir plate 2 is 10 mm. The temperature thermocouple 64 is arranged in the temperature-measuring refractory protective sleeve 63, the outer diameter of the temperature-measuring refractory protective sleeve 63 is 14mm, the inner diameter of the temperature-measuring refractory protective sleeve 63 is 8mm, the temperature-measuring refractory protective sleeve 63 provided with the temperature thermocouple 64 is arranged in the temperature-measuring hole 62, and the temperature thermocouple 64 is connected with the temperature signal acquisition device 66 through the temperature signal wire 65.
The temperature measuring weir plate 6 is arranged at the middle position of the tundish 1 close to the side of the submerged nozzle 5, the tundish 1 is divided into a mixing area 11 and a casting area 12, molten steel is injected into the mixing area 11 of the tundish 1 through the long nozzle 4, flows into the pouring area 12 of the tundish 1 through the gap between the bottom of the temperature measuring weir plate 6, the dam 7 and the bottom of the tundish 1, and flows out from the submerged nozzle 5 at the bottom of the tundish 1.
The continuous temperature measuring device of the invention continuously measures the temperature of the molten steel in the tundish 1 in such a way that: the temperature-measuring refractory protective sleeve 63 provided with the temperature-measuring thermocouple 64 (S-type thermocouple) is arranged in the temperature-measuring hole 62, the temperature-measuring thermocouple 64 which is 10mm away from the temperature-measuring weir plate 6 detects the temperature of the molten steel flowing through the bottom of the temperature-measuring weir plate 6 in real time, and the detected temperature signal is transmitted to the temperature signal acquisition device 66 through the temperature signal line 65, so that the temperature of the molten steel flowing through is continuously measured and recorded in real time.
The continuous temperature measuring device not only can continuously measure the temperature of molten steel in the tundish 1, but also can detect the temperature of the atmosphere in the tundish 1 in real time by the temperature measuring thermocouple 64 arranged in the temperature measuring weir plate 6 when the tundish 1 is baked, and sends the detected temperature signal to the temperature signal acquisition device 66 through the temperature signal line 65, thereby continuously measuring and recording the temperature of the baking atmosphere in real time.
Referring to fig. 3 and 4, a second embodiment of a continuous temperature measuring device for tundish molten steel according to the present invention includes:
the tundish 1 comprises a tundish refractory layer 2 and a tundish shell 3, a long nozzle 4 is installed at the top of the tundish 1, an immersion nozzle 5 is installed at the bottom of the tundish 1, a temperature measuring weir plate 6 is installed at the middle position of the tundish 1, and a dam 7 is installed between the temperature measuring weir plate 6 and the immersion nozzle 5. The temperature measurement weir plate 6 is installed in 1 middle part position of middle package, includes: the weir plate refractory body 61 is internally provided with a temperature measuring hole 62, a temperature measuring refractory protective sleeve 63 is arranged in the temperature measuring hole 62, a temperature measuring thermocouple 64 is arranged in the temperature measuring refractory protective sleeve 63, and the temperature measuring thermocouple 64 is connected with a temperature signal acquisition device 66 through a temperature signal line 65.
The temperature measuring weir plate 6 is made of aluminum-silicon refractory, the thickness of the weir plate refractory body 61 is 120mm, the steel through hole 67 is formed in the lower portion of the weir plate refractory body 61, the temperature measuring hole 62 is formed in the top of the weir plate refractory body 61 and is formed right above the steel through hole 67, the diameter of the temperature measuring hole 62 is 20mm, the temperature measuring hole 62 is through at the top of the temperature measuring weir plate 6, and the distance between the bottom of the temperature measuring hole 62 and the top of the steel through hole 67 is 15 mm. The temperature thermocouple 64 is arranged in the temperature-measuring refractory protective sleeve 63, the outer diameter of the temperature-measuring refractory protective sleeve 63 is 18mm, the inner diameter of the temperature-measuring refractory protective sleeve 63 is 10mm, the temperature-measuring refractory protective sleeve 63 provided with the temperature thermocouple 64 is arranged in the temperature-measuring hole 62, and the temperature thermocouple 64 is connected with the temperature signal acquisition device 66 through the temperature signal wire 65.
The temperature measuring weir plate 6 is arranged at the middle position of the tundish 1 and close to the side of the submerged nozzle 5, the tundish 1 is divided into a mixing area 11 and a casting area 12, molten steel in the ladle is injected into the mixing area 11 of the tundish 1 through the long nozzle 4, flows into the flow injection area 12 of the tundish 1 through the steel through hole 67 on the temperature measuring weir plate 6, and flows out from the submerged nozzle 5 at the bottom of the tundish 1.
The continuous temperature measuring device of the invention continuously measures the temperature of the molten steel in the tundish 1 by the following steps: the temperature-measuring refractory protective sleeve 63 provided with the temperature-measuring thermocouple 64 (type B thermocouple) is arranged in the temperature-measuring hole 62, the temperature-measuring thermocouple 64 which is 15mm away from the top of the steel through hole 67 detects the temperature of the molten steel flowing through the steel through hole 67 in real time, and the detected temperature signal is sent to the temperature signal acquisition device 66 through the temperature signal wire 65, so that the temperature of the molten steel flowing through is continuously measured and recorded in real time.
The continuous temperature measuring device not only can continuously measure the temperature of molten steel in the tundish 1, but also can detect the temperature of the atmosphere in the tundish 1 in real time by the temperature measuring thermocouple 64 arranged in the temperature measuring weir plate 6 when the tundish 1 is baked, and sends the detected temperature signal to the temperature signal acquisition device 66 through the temperature signal line 65, thereby continuously measuring and recording the temperature of the baking atmosphere in real time.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a continuous temperature measuring device of middle package molten steel, includes the middle package, links to the long mouth of a river at middle package top, and links to the immersion nozzle of middle bottom, its characterized in that: the tundish is divided into a mixing zone and a casting zone by a temperature measuring weir plate arranged in the tundish, the long water gap is arranged in the mixing zone, and the submerged water gap is arranged in the casting zone;
the temperature measuring weir plate comprises a weir plate refractory body, wherein a temperature measuring hole is formed in the weir plate refractory body, a temperature measuring refractory protective sleeve is arranged in the temperature measuring hole, a temperature measuring thermocouple is arranged in the temperature measuring refractory protective sleeve, and the temperature measuring thermocouple is connected with a temperature signal acquisition device through a temperature signal line.
2. The continuous temperature measuring device of tundish molten steel according to claim 1, characterized in that: the top of the temperature measuring hole is communicated with the top of the weir plate refractory body, and the distance between the bottom of the temperature measuring hole and the bottom of the weir plate refractory body is 10-20 mm.
3. The continuous temperature measuring device of tundish molten steel according to claim 2, characterized in that: the bottom of the weir plate refractory body is provided with a steel through hole, and the distance between the top of the steel through hole and the bottom of the temperature measuring hole is 10-20 mm.
4. The continuous temperature measuring device of tundish molten steel according to claim 2, characterized in that: and a dam is arranged between the weir plate refractory body and the submerged nozzle.
5. The continuous temperature measuring device of tundish molten steel according to claim 1, characterized in that: the weir plate refractory body is made of magnesium or aluminum-silicon refractory, and the thickness of the weir plate refractory body is more than 100mm, preferably more than 120 mm.
6. The continuous temperature measuring device of tundish molten steel according to claim 1, characterized in that: the diameter of the temperature measuring hole is 10 mm-30 mm, and the distance between the inner wall and the outer wall of the temperature measuring hole is more than 40 mm.
7. The continuous temperature measuring device of tundish molten steel according to claim 1, characterized in that: the temperature measurement is resistant material protective case and is made for the corundum material, and its top link up with the resistant material body top of weir plate, and temperature measurement is resistant material protective case bottom thick is 5 ~ 10mm, and the internal diameter is 2 ~ 5mm, and the external diameter is 10 ~ 20mm, and the wall thickness is 4 ~ 8 mm.
8. The continuous temperature measuring device of tundish molten steel of claim 7, characterized in that: the outer wall of the temperature-measuring refractory protective sleeve is wrapped with a heat-insulating fiber layer.
9. The continuous temperature measuring device of tundish molten steel according to claim 1, characterized in that: the temperature thermocouple is an S-type thermocouple, and a B-type platinum rhodium thermocouple is more preferable.
10. The continuous temperature measuring device of tundish molten steel according to claim 1, characterized in that: the tundish comprises a tundish shell and a tundish refractory layer laid on the inner wall of the tundish shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910499572.1A CN112059127A (en) | 2019-06-11 | 2019-06-11 | Continuous temperature measuring device for tundish molten steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910499572.1A CN112059127A (en) | 2019-06-11 | 2019-06-11 | Continuous temperature measuring device for tundish molten steel |
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| CN112059127A true CN112059127A (en) | 2020-12-11 |
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| CN201910499572.1A Pending CN112059127A (en) | 2019-06-11 | 2019-06-11 | Continuous temperature measuring device for tundish molten steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275533A (en) * | 2021-01-23 | 2021-08-20 | 黄红乾 | Automatic control device for pouring temperature of molten steel in continuous casting tundish |
| CN113564309A (en) * | 2020-04-28 | 2021-10-29 | 宝山钢铁股份有限公司 | Tundish with function of removing molten steel inclusions by blowing argon |
| CN114749649A (en) * | 2022-03-08 | 2022-07-15 | 盐城市联鑫钢铁有限公司 | Method for accurately controlling temperature of molten steel |
| CN115090838A (en) * | 2022-06-24 | 2022-09-23 | 包头钢铁（集团）有限责任公司 | Installation method of tundish continuous temperature measuring device |
| CN115138832A (en) * | 2021-03-29 | 2022-10-04 | 宝山钢铁股份有限公司 | Method for prolonging number of pure steel pouring furnaces based on molten steel weight information |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113564309A (en) * | 2020-04-28 | 2021-10-29 | 宝山钢铁股份有限公司 | Tundish with function of removing molten steel inclusions by blowing argon |
| CN113275533A (en) * | 2021-01-23 | 2021-08-20 | 黄红乾 | Automatic control device for pouring temperature of molten steel in continuous casting tundish |
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| CN115138832A (en) * | 2021-03-29 | 2022-10-04 | 宝山钢铁股份有限公司 | Method for prolonging number of pure steel pouring furnaces based on molten steel weight information |
| CN115138832B (en) * | 2021-03-29 | 2024-01-09 | 宝山钢铁股份有限公司 | Method for prolonging number of pure steel pouring furnaces based on molten steel weight information |
| CN114749649A (en) * | 2022-03-08 | 2022-07-15 | 盐城市联鑫钢铁有限公司 | Method for accurately controlling temperature of molten steel |
| CN115090838A (en) * | 2022-06-24 | 2022-09-23 | 包头钢铁（集团）有限责任公司 | Installation method of tundish continuous temperature measuring device |
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Application publication date: 20201211 |