CN109115353A - The production method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe - Google Patents
The production method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe Download PDFInfo
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- CN109115353A CN109115353A CN201811200388.4A CN201811200388A CN109115353A CN 109115353 A CN109115353 A CN 109115353A CN 201811200388 A CN201811200388 A CN 201811200388A CN 109115353 A CN109115353 A CN 109115353A
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- microns
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- tundish
- temperature measurement
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- 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
- G01K1/08—Protective devices, e.g. casings
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Abstract
A kind of production method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe, Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe includes that thickness is inside and outside two layers of 7 ~ 9 millimeters, and outer layer is made of 20 ~ 30% silicon-carbide particle, 15 ~ 25% stabilized magnesium hydroxide capacitive oxidation zirconium, 25 ~ 30% carborundum powder, 5 ~ 7% aluminium nitride, 10 ~ 15% hexagonal boron nitride and 8 ~ 12% silicone adhesive；Internal layer is made of 15 ~ 25% silicon-carbide particle, 20 ~ 30% carborundum powder, 15 ~ 25% crystalline flake graphite, 15 ~ 35% alumina powder and 8 ~ 12% silicone adhesive；The protective layer of external coating boric acid and silicon carbide micro-powder composition.A kind of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe of the invention has resistance to molten steel erosion, long service life, pyroconductivity height, the advantage short to the temperature change reaction time.
Description
Technical field
The present invention relates to a kind of manufacturing method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe, the Continuous Temperature Measurement of Liquid Steel in CC Tundish
Pipe, for continuously monitoring the temperature of Metal in Tundish.
Background technique
In steel billet continuously casting (abbreviation continuous casting) production process, molten steel temperature in tundish is to instruct continuous casting operation, control
One of slab quality, the most important parameter for reducing bleedout accident.One developed at the twentieth century latter stage fifties and the beginning of the sixties
The fast thermocouple that secondary property uses, which becomes history, has measured the standard technique of molten steel temperature in tundish since over half a century, also almost
It is unique technology.It is generally required using disposable fast thermocouple and was manually inserted into thermoelectricity into tundish every 5 ~ 10 minutes
Interruption thermometric occasionally is carried out, has the disadvantage that (1) point surveys the large labor intensity of worker in measurement, working environment is severe, can also draw
Molten steel is played to splash in the presence of the risk for causing personal injury；(2) quality of fast thermocouple and insertion position and insertion depth influence
The Stability and veracity of temperature measurement；(3) discontinuous measurement cannot get the process temperature of Metal in Tundish consecutive variations, be discontented with
The development trend automated enough.With the development of continuous-casting of steel billet technology and the exploitation of kind, molten steel in bakie in continuous casting temperature is controlled
Consecutive variations process be particularly important.And disposable fast thermocouple thermometric is used, frequent repeatedly measurement is needed, no
Only thermometric is costly, large labor intensity, and cannot really reflect the company of molten steel temperature in tundish from the point of view of quality control
Continuous change procedure, often because the height control of temperature is improper to cause quality accident, the steel grade stringent for quality requirement influences
It can be bigger.Therefore, the continuous bath temperature measurement technology of molten steel in bakie in continuous casting becomes technical problem anxious to be resolved.
Currently, major steel mill has begun to use the technology of Continuous Temperature Measurement of Liquid Steel in CC Tundish one by one, a company is used
Continuous temperature tube insertion Metal in Tundish liquid level hereinafter, and fixed position, the set that temperature thermocouple is placed in the pipe is internal, thus real
The temperature continuous monitoring of existing Metal in Tundish.But with the progress of major steel enterprise cost efficiency, there is an urgent need to extend tundish to make
The industry time promotes production operation efficiency, and just to the working life of tundish continuous temperature measuring tube, more stringent requirements are proposed for this, because
If molten steel continuous temperature measuring pipe is damaged in tundish operation process, replacement gets up to have very big difficulty and operating risk, because
This wishes that the service life of molten steel continuous temperature measuring pipe should be more than the service life of tundish.
On the other hand, current Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe is mostly aluminium carbon materials matter, due to being corroded intolerant to molten steel,
Wall thickness is mostly more than 30mm, and thermal conductivity is lower, therefore long to the molten steel temperature in tundish variation response time, and there are certain temperature
Spend risk out of control.
Summary of the invention
The purpose of the present invention is overcoming above-mentioned the deficiencies in the prior art, a kind of system of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe is provided
Make method, the Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe after being made is corroded with resistance to molten steel, long service life, while thermally conductive fast, temperature
The advantages that degree variation response time is short.
The solution to the technical problem of the present invention is as follows:
A kind of production method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe, Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe is made of ectonexine, inside and outside
Thickness degree is respectively 7 ~ 9 millimeters；Its production process are as follows: outer layer material and interior layered material are fitted into rubber mold using specific purpose tool,
Then sealing is placed on cold isostatic compaction under the pressure of 150 ~ 200MPa, and the outer surface brushing protective layer after demoulding in pipe dries in the air
It is dry, it is finally placed in reducing atmosphere and roasts 2.5 ~ 3 hours for 1050 DEG C ~ 1150 DEG C；
The weight proportion of the outer layer material are as follows: partial size is 600 ~ 830 microns of silicon-carbide particle 20 ~ 30%, partial size is 150 ~
230 microns of stabilized magnesium hydroxide capacitive oxidation zirconium 15 ~ 25%, the carborundum powder 25 ~ 30% that partial size is 25 ~ 45 microns, partial size 0.5
~ 2 microns of aluminium nitride 5 ~ 7%, the hexagonal boron nitride 10 ~ 15% that partial size is 2 ~ 5 microns, liquid silicone 8 ~ 12%；
The interior layered material weight proportion are as follows: the silicon-carbide particle 15 ~ 25% that partial size is 600 ~ 830 microns, partial size are 45 ~ 75 micro-
The carborundum powder 20 ~ 30% of rice, crystalline flake graphite 15 ~ 25%, the alumina powder 15 ~ 35% that partial size is 1.5 ~ 3 microns, silicone resin 8 ~
12%；
The weight proportion of the brushing protective layer are as follows: water 60 ~ 70%, boric acid 4.5 ~ 5%, partial size are that 2 ~ 5 microns of silicon carbide is micro-
Powder 25 ~ 35%.
Studies have shown that the cladding material of the continuous measurement of molten steel temperature protective case based on non-oxidized substance, with oxide in molten steel,
The affinity of steel slag is lower, especially the addition of inert material hexagonal boron nitride, prevent molten steel, steel slag are from soaking outside protective case
Surface, therefore the erosion performance of resistance to molten steel is excellent, protective case service life is increased dramatically, thus identical using the time in design
Under the premise of can reduce wall thickness.For the inner layer material of protective case, since protective case inner space is starvation,
Graphite is difficult to be oxidized scaling loss, replaces hexagonal boron nitride to save cost with a large amount of graphite.In addition, research experiment shows
It is reduced while having used the high heat conduction aluminum heat-resisting materials such as a large amount of silicon carbide, hexagonal boron nitride, aluminium nitride, graphite
The thickness of protective case significantly reduces protective case internal and external temperature variation response time, this real time monitoring for tundish temperature
There is remarkable result.
Detailed description of the invention
Fig. 1 is a kind of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe structural schematic diagram.
Specific embodiment
The present invention is further described combined with specific embodiments below.
Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe includes outer layer 1 and internal layer 2, and outer layer and internal layer are casing closed at one end, interior
Outer layer thickness is respectively 7 ~ 9 millimeters；Its production method includes the following steps:
Embodiment 1: include the following steps:
(1) outer layer material: the weight proportion of the outer layer material is configured are as follows: the silicon-carbide particle 20% that partial size is 600 ~ 830 microns,
The stabilized magnesium hydroxide capacitive oxidation zirconium 25% that partial size is 150 ~ 230 microns, the carborundum powder 30% that partial size is 25 ~ 45 microns, partial size
For 0.5 ~ 2 micron of aluminium nitride 5%, the hexagonal boron nitride 10% that partial size is 2 ~ 5 microns, liquid silicone 10%；
(2) layered material in configuring: the interior layered material weight proportion are as follows: the silicon-carbide particle 15% that partial size is 600 ~ 830 microns, grain
The carborundum powder 29% that diameter is 45 ~ 75 microns, crystalline flake graphite 15%, the alumina powder 21% that partial size is 1.5 ~ 3 microns, silicone resin
10%；
(3) protection layer for paint: the weight proportion of the brushing protective layer is configured are as follows: water 65%, boric acid 5%, partial size are 2 ~ 5 microns
Silicon carbide micro-powder 30%.
(4) outer layer material that (1) step obtains and the interior layered material that (2) step obtains are packed into rubber mold using specific purpose tool
In, charge ensures that ectonexine final thickness is respectively 8 millimeters, then sealing be placed under the pressure of 180MPa isostatic cool pressing at
Type is brushed the protection layer for paint that (3) step obtains in the outer surface of pipe after demoulding and is dried, is finally placed in reducing atmosphere
1100 DEG C roast 3 hours.
Embodiment 2: include the following steps:
(1) outer layer material is configured: it is characterized in that, the weight proportion of the outer layer material are as follows: the carbonization that partial size is 600 ~ 830 microns
Silicon particle 23%, the stabilized magnesium hydroxide capacitive oxidation zirconium 20% that partial size is 150 ~ 230 microns, the silicon carbide that partial size is 25 ~ 45 microns
Powder 30%, the aluminium nitride 6% that partial size is 0.5 ~ 2 micron, the hexagonal boron nitride 11% that partial size is 2 ~ 5 microns, liquid silicone 10%；
(2) layered material in configuring: it is characterized in that, the interior layered material weight proportion are as follows: the silicon carbide that partial size is 600 ~ 830 microns
Particle 18%, the carborundum powder 28% that partial size is 45 ~ 75 microns, crystalline flake graphite 19%, the alumina powder that partial size is 1.5 ~ 3 microns
25%, silicone resin 10%；
(3) protection layer for paint is configured: it is characterized in that, the weight proportion of the brushing protective layer are as follows: water 65%, boric acid 5%, grain
The silicon carbide micro-powder 30% that diameter is 2 ~ 5 microns.
(4) outer layer material that (1) step obtains and the interior layered material that (2) step obtains are packed into rubber mold using specific purpose tool
In, charge ensures that ectonexine final thickness is respectively 8 millimeters, then sealing be placed under the pressure of 180MPa isostatic cool pressing at
Type is brushed the protection layer for paint that (3) step obtains in the outer surface of pipe after demoulding and is dried, is finally placed in reducing atmosphere
1100 DEG C roast 3 hours.
Embodiment 3: include the following steps:
(1) outer layer material is configured: it is characterized in that, the weight proportion of the outer layer material are as follows: the carbonization that partial size is 600 ~ 830 microns
Silicon particle 25%, the stabilized magnesium hydroxide capacitive oxidation zirconium 16% that partial size is 150 ~ 230 microns, the silicon carbide that partial size is 25 ~ 45 microns
Powder 30%, the aluminium nitride 6% that partial size is 0.5 ~ 2 micron, the hexagonal boron nitride 12% that partial size is 2 ~ 5 microns, liquid silicone 11%；
(2) layered material in configuring: it is characterized in that, the interior layered material weight proportion are as follows: the silicon carbide that partial size is 600 ~ 830 microns
Particle 20%, the carborundum powder 25% that partial size is 45 ~ 75 microns, crystalline flake graphite 20%, the alumina powder that partial size is 1.5 ~ 3 microns
25%, silicone resin 10%；
(3) protection layer for paint is configured: it is characterized in that, the weight proportion of the brushing protective layer are as follows: water 65%, boric acid 5%, grain
The silicon carbide micro-powder 30% that diameter is 2 ~ 5 microns.
(4) outer layer material that (1) step obtains and the interior layered material that (2) step obtains are packed into rubber mold using specific purpose tool
In, charge ensures that ectonexine final thickness is respectively 8 millimeters, then sealing be placed under the pressure of 180MPa isostatic cool pressing at
Type is brushed the protection layer for paint that (3) step obtains in the outer surface of pipe after demoulding and is dried, is finally placed in reducing atmosphere
1100 DEG C roast 3 hours.
Embodiment 4: include the following steps:
(1) outer layer material is configured: it is characterized in that, the weight proportion of the outer layer material are as follows: the carbonization that partial size is 600 ~ 830 microns
Silicon particle 27%, the stabilized magnesium hydroxide capacitive oxidation zirconium 20% that partial size is 150 ~ 230 microns, the silicon carbide that partial size is 25 ~ 45 microns
Powder 25%, the aluminium nitride 6% that partial size is 0.5 ~ 2 micron, the hexagonal boron nitride 14% that partial size is 2 ~ 5 microns, liquid silicone 8%；
(2) layered material in configuring: it is characterized in that, the interior layered material weight proportion are as follows: the silicon carbide that partial size is 600 ~ 830 microns
Particle 24%, the carborundum powder 23% that partial size is 45 ~ 75 microns, crystalline flake graphite 25%, the alumina powder that partial size is 1.5 ~ 3 microns
20%, silicone resin 8%；
(3) protection layer for paint is configured: it is characterized in that, the weight proportion of the brushing protective layer are as follows: water 65%, boric acid 5%, grain
The silicon carbide micro-powder 30% that diameter is 2 ~ 5 microns.
(4) outer layer material that (1) step obtains and the interior layered material that (2) step obtains are packed into rubber mold using specific purpose tool
In, charge ensures that ectonexine final thickness is respectively 8 millimeters, then sealing be placed under the pressure of 180MPa isostatic cool pressing at
Type is brushed the protection layer for paint that (3) step obtains in the outer surface of pipe after demoulding and is dried, is finally placed in reducing atmosphere
1100 DEG C roast 3 hours.
Embodiment 5: include the following steps:
(1) outer layer material is configured: it is characterized in that, the weight proportion of the outer layer material are as follows: the carbonization that partial size is 600 ~ 830 microns
Silicon particle 30%, the stabilized magnesium hydroxide capacitive oxidation zirconium 15% that partial size is 150 ~ 230 microns, the silicon carbide that partial size is 25 ~ 45 microns
Powder 25%, the aluminium nitride 7% that partial size is 0.5 ~ 2 micron, the hexagonal boron nitride 15% that partial size is 2 ~ 5 microns, liquid silicone 8%；
(2) layered material in configuring: it is characterized in that, the interior layered material weight proportion are as follows: the silicon carbide that partial size is 600 ~ 830 microns
Particle 25%, the carborundum powder 22% that partial size is 45 ~ 75 microns, crystalline flake graphite 25%, the alumina powder that partial size is 1.5 ~ 3 microns
20%, silicone resin 8%；
(3) protection layer for paint is configured: it is characterized in that, the weight proportion of the brushing protective layer are as follows: water 65%, boric acid 5%, grain
The silicon carbide micro-powder 30% that diameter is 2 ~ 5 microns.
(4) outer layer material that (1) step obtains and the interior layered material that (2) step obtains are packed into rubber mold using specific purpose tool
In, charge ensures that ectonexine final thickness is respectively 8 millimeters, then sealing be placed under the pressure of 180MPa isostatic cool pressing at
Type is brushed the protection layer for paint that (3) step obtains in the outer surface of pipe after demoulding and is dried, is finally placed in reducing atmosphere
1100 DEG C roast 3 hours.
The result of above 5 embodiments and comparative example for the production of molten steel Tundish Connection is summarized in following table:
In table, comparative example 1 is conventional Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe, is made of aluminium oxide and graphite.
As shown above, the resistance to molten steel aggressivity and service life ratio of continuous temperature measurement of molten steel tundish protection pipe provided by the invention
Conventional products significantly improve, simultaneously because wall thickness is relatively thin, and the high-temperature material for having used heating conduction excellent, the response to temperature
Time significantly shortens.
The above is only to be not intended to limit the scope of the present invention to presently preferred embodiments of the present invention, therefore do not taking off
Under the premise of design spirit of the present invention, this field ordinary engineering and technical personnel is to structure, feature and principle of the present invention
The equivalence changes or decoration made, should all fall into the protection scope of the present patent application patent.
Claims (4)
1. a kind of production method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe, Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe is made of ectonexine, interior
Outer layer thickness is respectively 7 ~ 9 millimeters；Its production process are as follows: outer layer material and interior layered material are packed into rubber mold using specific purpose tool
In, then sealing is placed on cold isostatic compaction under the pressure of 150 ~ 200MPa, brushes protection in the outer surface of pipe after demoulding
Layer dries, and is finally placed in reducing atmosphere and roasts 2.5 ~ 3 hours for 1050 DEG C ~ 1150 DEG C.
2. a kind of production method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe according to claim 1, which is characterized in that described
The weight proportion of outer layer material are as follows: the silicon-carbide particle 20 ~ 30% that partial size is 600 ~ 830 microns, the oxygen that partial size is 150 ~ 230 microns
Change magnesium and stablizes capacitive oxidation zirconium 15 ~ 25%, the carborundum powder 25 ~ 30% that partial size is 25 ~ 45 microns, the nitrogen that partial size is 0.5 ~ 2 micron
Change aluminium 5 ~ 7%, the hexagonal boron nitride 10 ~ 15% that partial size is 2 ~ 5 microns, liquid silicone 8 ~ 12%.
3. a kind of production method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe according to claim 1, which is characterized in that described
Interior layered material weight proportion are as follows: the silicon-carbide particle 15 ~ 25% that partial size is 600 ~ 830 microns, the silicon carbide that partial size is 45 ~ 75 microns
Powder 20 ~ 30%, crystalline flake graphite 15 ~ 25%, the alumina powder 15 ~ 35% that partial size is 1.5 ~ 3 microns, silicone resin 8 ~ 12%.
4. a kind of production method of Continuous Temperature Measurement of Liquid Steel in CC Tundish pipe according to claim 1, which is characterized in that described
The weight proportion of brushing protective layer are as follows: water 60 ~ 70%, boric acid 4.5 ~ 5%, the silicon carbide micro-powder 25 ~ 35% that partial size is 2 ~ 5 microns.
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| CN101906225A (en) * | 2009-06-04 | 2010-12-08 | 合肥杰事杰新材料有限公司 | Thermal conductive high polymer material applied to pipes and preparation method thereof |
| CN101943607A (en) * | 2010-08-31 | 2011-01-12 | 马鞍山钢铁股份有限公司 | Inlaid type infrared temperature-measuring tube for continuous temperature measurement of liquid steel as well as components and preparation method thereof |
| DE102016011721A1 (en) * | 2016-09-30 | 2018-04-05 | Ralph Funck | Process for producing thin-walled coatings on tubular fiber composite materials |
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| CN1280670A (en) * | 1997-11-28 | 2001-01-17 | 新特卡斯特有限公司 | A Sampling device for thermal analysis |
| CN1238449A (en) * | 1999-04-23 | 1999-12-15 | 清华大学 | Thermocouple protection tube of boron nitride based composite ceramic material |
| CN101118186A (en) * | 2007-08-30 | 2008-02-06 | 聚光科技（杭州）有限公司 | High-temperature continuously temperature measuring system and manufacturing method of temperature measurement pipe |
| CN101906225A (en) * | 2009-06-04 | 2010-12-08 | 合肥杰事杰新材料有限公司 | Thermal conductive high polymer material applied to pipes and preparation method thereof |
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| DE102016011721A1 (en) * | 2016-09-30 | 2018-04-05 | Ralph Funck | Process for producing thin-walled coatings on tubular fiber composite materials |
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