CN101943607B - Inlaid type infrared temperature-measuring tube for continuous temperature measurement of liquid steel as well as components and preparation method thereof - Google Patents
Inlaid type infrared temperature-measuring tube for continuous temperature measurement of liquid steel as well as components and preparation method thereof Download PDFInfo
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- CN101943607B CN101943607B CN 201010272447 CN201010272447A CN101943607B CN 101943607 B CN101943607 B CN 101943607B CN 201010272447 CN201010272447 CN 201010272447 CN 201010272447 A CN201010272447 A CN 201010272447A CN 101943607 B CN101943607 B CN 101943607B
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Abstract
The invention discloses an inlaid type infrared temperature-measuring tube for continuous temperature measurement of liquid steel, comprising a connecting piece, a scavenging duct and a temperature-measuring tube body. The embedded infrared temperature-measuring tube is characterized in that the lower end part of the temperature-measuring tube body is opened and provided with a groove for inlaying heat-conducting fins; the heat-conducting fins are inlaid into the groove and cemented by using high-temperature daub so as to form a closed end and a temperature sensing area of the temperature-measuring tube; the outer surface of the lower end part of the temperature-measuring tube body is sleeved with a protection cover; the temperature-measuring tube body comprises the following components in percentage by weight: 50-78% of Al2O3, 20-40% of C, 1-5% of Si, 1-5% of Al; and each heat-conducting fin comprises the following components in percentage by weight: 30-60% of graphite, 30-68% of Al2O3, 1-5% of Si and 1-5% of Al. The inlaid type infrared temperature-measuring tube has temperature-measuring response time less than or equal to 4 minutes and service life longer than or equal to 30 hours.
Description
Technical field
The present invention relates to infrared optics thermometry field, refer more particularly to the infrared continuous thermometering device to high-temperature molten steel.
Background technology
In recent years, in steel industry, used Metal in Tundish infrared optics continuous bath temperature measurement technology, adopted this technology to show continuously and automatically record molten steel temperature in tundish, be convenient to continuous casting operation and in time adjust and control.The infrared optics temp measuring system is processed by temperature tube, infrared signal collecting transmitter and signal and temperature shows that several parts consist of.Wherein temperature tube is daily main wearing detail, accounts for more than 80% of infrared optics temp measuring system use cost.
Temperature tube is a kind of end sealing, and the fire resistive material body of an end opening is generally by Al
2O
3, C, Si consist of.Chinese patent ZL200620165325.6, Chinese patent 200720113118.0, Chinese patent 200920143429.0 and 200920142942.8 disclose respectively temperature tube structure separately (seeing that Fig. 1 shows).In technique scheme, all used mono-layer tube, reduced the time of temperature tube perception high-temperature molten steel temperature, simultaneously, adopt separately different purging measures, optical channel to temperature tube purges purification, and the flue gas that temperature tube material self produces when having alleviated high temperature or volatile matter be to the pollution of infrared optics passage, thereby has improved response speed and the accuracy of infrared measurement of temperature.
The thermometric response speed of temperature tube depends primarily on the thickness of blind end, coefficient of heat conductivity and the blackness of material, especially thickness, coefficient of heat conductivity and the blackness of bottom.In above-mentioned each technical scheme, have several common problems: the bottom of (1) temperature tube sealing is hemispherical thin-wall construction, processing difficulties.In the High Rotation Speed process vibrations or swing can occur, easily form manufacturing deficiency, be difficult to guarantee that temperature tube end sphere walled thickness is consistent, cause the temperature tube performance inconsistency.Wall thickness is inconsistent will to cause the temperature tube unstable properties produced in batches: the large thermometric response speed of wall thickness is slow, and wall thickness is just very low too thin serviceable life.(2) in above-mentioned patented technology, making temperature tube body and bottom all is same alumina graphite materials, does not adopt the larger material of coefficient of heat conductivity to carry out composite manufacturing in bottom temperature sensing zone, therefore, has limited the thermometric response speed and has improved.(3) because temperature tube generally is the aluminium carbonaceous, easily oxidation, although therefore surface spraying one deck antioxidizing paint, when carrying out high-temperature baking with tundish before use, to a certain degree oxidation still can occur in top layer, temperature tube bottom (blind end).The oxidation of temperature tube bottom not only reduces temperature conductivity, reduces the thermometric response speed, and can affect serviceable life, and the response time of present temperature tube, the longevity was used life 15-25 hour between 5-10 minute.
Summary of the invention
For solving the prior art existing problems, the invention provides a kind of continuous measurement of molten steel temperature mosaic type composite infrared temperature measuring pipe, utilize this temperature tube can improve thermometric response speed, serviceable life and stability, reduce simultaneously temperature tube manufacturing cost and use cost.
For achieving the above object, the inserted infrared temperature measuring pipe of continuous measurement of molten steel temperature provided by the invention comprises connecting piece, scavenging duct, temperature tube body, it is characterized in that, described temperature tube body underpart opening; The groove of conducting strip is inlayed in the inner chamber setting of temperature tube body bottom, and conducting strip is mounted in the described groove, and cements with the high temperature clay, forms blind end and the temperature sensing district of described temperature tube; Described temperature tube body bottom outside surface suit protective cover; Described temperature tube body weight percentages of components is: Al
2O
350～78%, C 20～40%, Si 1～5%, Al 1～5%; Described conducting strip weight percentages of components is: C 30～60%, Al
2O
330～68%, Si 1～5%, Al 1～5%.
Further improvement of the present invention is, the described groove of inlaying conducting strip is annular groove, and described conducting strip is truncated cone-shaped or cylindrical.
Further improvement of the present invention is that described protective cover is the thin-wall metal cover.
The preparation method of temperature tube body of the present invention is: with 50～78%Al
2O
3, 20～40%C is primary raw material, adds 1～5% Si powder and 1～5% Al powder again, take phenolics as bond, and through mixing granulation, the suitable rubber mold of packing into after the drying, the working cylinder inner high voltage moulding of putting into isostatic pressing machine, the then demoulding, baking.
The preparation method of conducting strip of the present invention is: the Al with 30～68%
2O
3, 30～60%C is main material, adds 1～5% Si powder and 1～5% Al powder again, take phenolics as bond, through isostatic compaction, machined becoming about thickness 20mm again, truncated conical shape or cylindrical shape conducting strip that diameter and thermometric body 3 lower recess mate mutually.
Temperature tube underpart opening of the present invention is convenient to processing, reduces rejection rate.The conducting strip that inlay temperature tube body bottom is by high heat conduction, high temperature resistant, erosion-resistant material manufacturing, conducting strip is through reconditioning processing, be processed into accurately round table-like or cylindric lamellar body of thickness, conducting strip is mounted to temperature tube body bottom, form the temperature sensing district of infrared temperature measuring pipe.Protective cover is a thin-wall metal cover, and mainly in order to protect conducting strip, conducting strip can oxidation when guaranteeing that temperature tube carries out high-temperature baking with tundish before use, thereby guarantees that temperature tube has high thermometric response speed and serviceable life.Compared with prior art, the present invention has following effect:
(1) the thermometric response speed of raising temperature tube, response time≤4min.
(2) improve serviceable life, serviceable life 〉=30 hour.
(3) reduce temperature tube manufacturing cost and use cost, because the equal opening of this temperature tube upper and lower side is convenient to processing, reduce rejection rate, can reduce manufacturing cost, this temperature tube long service life can reduce use cost.
Description of drawings
Fig. 1: prior art temperature tube structural representation
Fig. 2: temperature tube structural representation of the present invention
Embodiment:
The present invention is described in detail below in conjunction with accompanying drawing.
As shown in Figure 2, the invention provides a kind of continuous measurement of molten steel temperature mosaic type composite infrared temperature measuring pipe, comprising: connecting piece 1, scavenging duct 2, temperature tube body 3, conducting strip 4, protective cover 5.Connecting piece 1 is the steel pipe that certain taper is processed at two ends, and one end and temperature tube body 3 bond together, and the other end will be connected with infrared temperature-measuring gun.Scavenging duct 2 is refractory ceramics pipe or a quartz glass tube, diameter
Length is about half of temperature tube total length.Scavenging duct 2 adopts mosaic mode to be installed on the connecting piece 1, and bonding with bonding agent.Scavenging duct 2 Main Functions are that flue gas or the volatile matter that will produce in the temperature tube purge out body, to keep the cleaning of thermometric optical channel.Temperature tube body 3 is a kind of aluminium carbonaceous refractory tubes, and its chief component is: Al
2O
350～78%; C 20～40%; Si powder 1～5%; Al powder 1～5% take phenolics as bond, adopts isostatic compaction.Reserve 2 diameters in appropriate location, body upper end
Through hole is used for discharging flue gas and volatile matter.Temperature tube body bottom inner chamber is reserved the groove of inlaying conducting strip 4.Conducting strip 4 by high heat conduction, high temperature resistant, erosion-resistant material manufacturing, can be some high heat conduction high temperature alloy, highly-conductive hot carbon compound, the alumina-carbon material of especially cheap high C content, for example C30～60%, Al
2O
330～68%, the alumina-carbon material of Si powder 1～5%, Al powder 1～5%.Conducting strip is processed into accurately round table-like or cylindric lamellar body of thickness through reconditioning processing.Conducting strip 4 is mounted to the bottom inner chamber of temperature tube body 3, forms the temperature sensing district of infrared temperature measuring pipe.Protective cover 5 is a thin-wall metal cover, and mainly in order to protect conducting strip, conducting strip can oxidation when guaranteeing that temperature tube carries out high-temperature baking with tundish before use, thereby guarantees that temperature tube has high thermometric response speed and serviceable life.Protective cover 5 inserts at temperature tube will melt rapidly disappearance after molten steel comes into operation.
Below 3 embodiment be preparation method of the present invention.
(1) makes thermometric body 3, with 50%Al
2O
3, 40% C is primary raw material, adds in addition 5% Si powder and 5% Al powder, take phenolics as bond, through mixing granulation, the suitable rubber mold of packing into after the drying, the working cylinder inner high voltage moulding of putting into isostatic pressing machine.Then for subsequent use after the demoulding, the baking.
(2) make conducting strip 4, the Al with 30%
2O
3, 60% C is raw material, adds in addition 5% Si powder and 5% Al powder, take phenolics as bond, through isostatic compaction, machined becoming about thickness 20mm again, truncated conical shape or cylindrical shape conducting strip that diameter and thermometric body 3 lower recess mate mutually.
(3) conducting strip 4 is embedded in the lower recess of thermometric body 3, cements with the high temperature clay, form blind end and the temperature sensing district of temperature tube.
(4) connecting piece 1 is the common steel tube that certain taper is processed at two ends, and scavenging duct 2 is that the diameter of outsourcing is
Al2O3 pipe or quartz glass tube.Scavenging duct 2 is embedded on the connecting piece 1, and bonding with bonding agent, the rear openend that an end of connecting piece 1 is inserted temperature tube to be dried, and the high temperature clay cements.Its composition and performance see Table 1.
(1) makes thermometric body 3, with 65%Al
2O
3, 30% C is primary raw material, adds in addition 2.5% Si powder and 2.5% Al powder, take phenolics as bond, through mixing granulation, the suitable rubber mold of packing into after the drying, the working cylinder inner high voltage moulding of putting into isostatic pressing machine.Then for subsequent use after the demoulding, the baking.
(2) make conducting strip 4, the Al with 55%
2O
3, 40% C is raw material, adds in addition 2.5% Si powder and 2.5% Al powder, take phenolics as bond, through isostatic compaction, machined becoming about thickness 20mm again, truncated conical shape or cylindrical shape conducting strip that diameter and thermometric body 3 lower recess mate mutually.
(3) conducting strip 4 is inlayed in the lower recess with thermometric body 3, cemented with the high temperature clay, form blind end and the temperature sensing district of temperature tube.
(4) connecting piece 1 is the common steel tube that certain taper is processed at two ends, and scavenging duct 2 is that the diameter of outsourcing is
Al2O3 pipe or quartz glass tube.Scavenging duct 2 is embedded on the connecting piece 1, and bonding with bonding agent, the rear openend that an end of connecting piece 1 is inserted temperature tube to be dried, and the high temperature clay cements.Its composition and performance see Table 1.
(1) makes thermometric body 3, with 78%Al
2O
3, 20% C is primary raw material, adds in addition 1% Si powder and 1% Al powder, take phenolics as bond, through mixing granulation, the suitable rubber mold of packing into after the drying, the working cylinder inner high voltage moulding of putting into isostatic pressing machine.Then for subsequent use after the demoulding, the baking.
(2) make conducting strip 4, the Al with 68%
2O
3, 30% C is raw material, adds in addition 1% Si powder and 1% Al powder, take phenolics as bond, through isostatic compaction, machined becoming about thickness 20mm again, truncated conical shape or cylindrical shape conducting strip that diameter and thermometric body 3 lower recess mate mutually.
(3) conducting strip 4 is inlayed in the lower recess with thermometric body 3, cemented with the high temperature clay, form blind end and the temperature sensing district of temperature tube.
(4) connecting piece 1 is the common steel tube that certain taper is processed at two ends, and scavenging duct 2 is that the diameter of outsourcing is
Al2O3 pipe or quartz glass tube.Scavenging duct 2 is embedded on the connecting piece 1, and bonding with bonding agent, the rear openend that an end of connecting piece 1 is inserted temperature tube to be dried, and the high temperature clay cements.Its composition and performance see Table 1.
Table 1: composition of the present invention and performance
Have the response time of temperature tube now between 5-10 minute, 15-25 hour serviceable life.And response time≤4 of temperature tube of the present invention minute, serviceable life 〉=30 hour, the response time obviously shortens, and significantly improve serviceable life.
Claims (4)
1. the inserted infrared temperature measuring pipe of continuous measurement of molten steel temperature comprises connecting piece, scavenging duct, temperature tube body, it is characterized in that, described temperature tube body underpart opening; The groove of conducting strip is inlayed in the inner chamber setting of temperature tube body bottom, and conducting strip is mounted in the described groove, and cements with the high temperature clay, forms blind end and the temperature sensing district of described temperature tube; Described temperature tube body bottom outside surface suit protective cover; Described temperature tube body is aluminium carbonaceous refractory tube, and its weight percentages of components is: Al
2O
350～78%, C 20～40%, Si 1～5%, Al 1～5%; Described conducting strip is alumina-carbon material, and its weight percentages of components is: C 30～60%, Al
2O
330～68%, Si 1～5%, Al 1～5%.
2. the inserted infrared temperature measuring pipe of continuous measurement of molten steel temperature as claimed in claim 1 is characterized in that, the described groove of inlaying conducting strip is annular groove, and described conducting strip is truncated cone-shaped or cylindrical.
3. the inserted infrared temperature measuring pipe of continuous measurement of molten steel temperature as claimed in claim 1 is characterized in that, described protective cover is the thin-wall metal cover.
4. a continuous measurement of molten steel temperature as claimed in claim 1 is characterized in that with the preparation method of inserted infrared temperature measuring pipe, comprises the preparation method of temperature tube body and conducting strip; The preparation method of described temperature tube body is: the Al with 50～78%
2O
3, 20～40% C is primary raw material, adds 1～5% silica flour and 1～5% aluminium powder again, take phenolics as bond, and through mixing granulation, the suitable rubber mold of packing into after the drying, the working cylinder inner high voltage moulding of putting into isostatic pressing machine, the then demoulding, baking; The preparation method of described conducting strip is: the Al with 30～68%
2O
3, 30～60% C is primary raw material, adds 1～5% silica flour and 1～5% aluminium powder again, take phenolics as bond, through isostatic compaction, machined becoming about thickness 20mm again, truncated conical shape or cylindrical shape conducting strip that diameter and thermometric body 3 lower recess mate mutually.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010272447 CN101943607B (en) | 2010-08-31 | 2010-08-31 | Inlaid type infrared temperature-measuring tube for continuous temperature measurement of liquid steel as well as components and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010272447 CN101943607B (en) | 2010-08-31 | 2010-08-31 | Inlaid type infrared temperature-measuring tube for continuous temperature measurement of liquid steel as well as components and preparation method thereof |
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|---|---|
| CN101943607A CN101943607A (en) | 2011-01-12 |
| CN101943607B true CN101943607B (en) | 2013-03-27 |
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| CN109115353B (en) * | 2018-10-16 | 2020-09-22 | 宋振亚 | Method for manufacturing continuous temperature measuring tube of tundish molten steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687722A (en) * | 2005-05-20 | 2005-10-26 | 清华大学 | Photoelectric temperature measuring instrument of dual wavelength based on blackbody radiation |
| CN200971378Y (en) * | 2006-02-28 | 2007-11-07 | 丁刚 | Equipment for manufacturing multi-phase reinforced metal composite material |
| CN201075034Y (en) * | 2007-08-13 | 2008-06-18 | 聚光科技（杭州）有限公司 | Hyperthermia continuous measurement device |
| CN101391897A (en) * | 2007-09-20 | 2009-03-25 | 辽宁科技大学 | Air brick for magnesia carbon ladle and method for producing the same |
| CN201837463U (en) * | 2010-08-31 | 2011-05-18 | 马鞍山钢铁股份有限公司 | Mosaic type composite infrared temperature measuring pipe used for continuously measuring temperatures of molten steel |
-
2010
- 2010-08-31 CN CN 201010272447 patent/CN101943607B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687722A (en) * | 2005-05-20 | 2005-10-26 | 清华大学 | Photoelectric temperature measuring instrument of dual wavelength based on blackbody radiation |
| CN200971378Y (en) * | 2006-02-28 | 2007-11-07 | 丁刚 | Equipment for manufacturing multi-phase reinforced metal composite material |
| CN201075034Y (en) * | 2007-08-13 | 2008-06-18 | 聚光科技（杭州）有限公司 | Hyperthermia continuous measurement device |
| CN101391897A (en) * | 2007-09-20 | 2009-03-25 | 辽宁科技大学 | Air brick for magnesia carbon ladle and method for producing the same |
| CN201837463U (en) * | 2010-08-31 | 2011-05-18 | 马鞍山钢铁股份有限公司 | Mosaic type composite infrared temperature measuring pipe used for continuously measuring temperatures of molten steel |
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