CN105671232A - Online installation process of iron-smelting blast furnace thermocouple - Google Patents
Online installation process of iron-smelting blast furnace thermocouple Download PDFInfo
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- CN105671232A CN105671232A CN201610214516.5A CN201610214516A CN105671232A CN 105671232 A CN105671232 A CN 105671232A CN 201610214516 A CN201610214516 A CN 201610214516A CN 105671232 A CN105671232 A CN 105671232A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
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Abstract
The invention discloses an online installation process of an iron-smelting blast furnace thermocouple, and belongs to the field of temperature detection of blast furnaces in the metallurgical industry. The online installation process comprises the following steps: step I: boring and measuring temperature, specifically, boring from the surface of a furnace casing by adopting a boring machine, when the boring reaches a carbon brick, measuring the temperature, recording the temperature as t, and forming an installation hole after the boring is completed; step II: installing a thermocouple, specifically, installing the thermocouple into the installation hole, and filling clearances by filling the installation hole with slurry; and step III: detecting the accuracy, specifically, after the slurry filling the clearances is solidified, reading a temperature measurement numerical value of the installed thermocouple, recording the temperature as t', and when the absolute value of (t-t')/t is less than or equal to 5 percent, determining that the thermocouple is correctly installed and conforms to the application standard; and otherwise, re-installing, and repeating the step I to step III. By comparing the temperature difference of a temperature measuring point and the temperature difference at two temperature-measuring points, whether the installation of the thermocouple conforms to the standard is judged, so that the qualified installation of the blast furnace thermocouple is guaranteed.
Description
Technical field
The present invention relates to blast furnace temperature detection field in metallurgy industry, more particularly, it relates to the online mounting process of a kind of blast furnace thermocouple.
Background technology
Blast furnace is the important component part of integrated iron and steel works, and blast-furnace technique economic indicator is good, and technique is simple, and volume of production is big, and labor productivity is high, and energy consumption is low, and the pig iron of its production accounts for more than the 95% of World Iron total output. Nowadays, prolonging campaign is the target that modern blast furnace is pursued, and prolonging campaign means that the raising of economic benefit. Wherein, blast furnace crucibe, furnace bottom are blast fumance safety and the long-lived most important thing, and from current statistics, domestic and international blast furnace crucibe burns the corner mostly occurring in sidewall or sidewall and furnace bottom, the elephant foot attack sites being commonly called as at once.
At present, blast furnace crucibe, furnace bottom state calculate mainly by thermocouple detection temperature and judge the residual thickness of cupola well. Therefore, cupola well, bottom temperature on-line monitoring have become the important means of monitoring cupola well furnace bottom erosion state, are also set up cupola well bottom lining to corrode condition necessary to mathematical model. Blast furnace is when newly-built, furnace bottom and bosh gas index all bury a number of thermocouple underground, but the adverse circumstances along with the passage produced and cupola well itself, the installation site of originally pre-buried thermocouple there occurs deviation, the temperature of detection lacks verity and effectiveness, cupola well galvanic couple lost efficacy and undoubtedly the supervision of cupola well state was brought a lot of blind area, corrodes monitoring to brick lining in blast furnace chamber and production safety brings hidden danger.
And, owing to cannot directly thermocouple be inserted in carbon brick, generally on carbon brick, thermocouple is installed in boring, but adopt existing technology to hole on blast furnace and thermocouple is installed, easily cause the installation of TC inaccurate, thermocouple heat conduction, thermometric are made a big impact so that thermocouple is big to the measurement error of blast furnace crucibe, bottom temperature so that can not on-line monitoring cupola well furnace bottom erosion state timely. Bringing serious potential safety hazard to blast fumance, this technical problem is urgently to be resolved hurrily.
Through retrieval, existing related art scheme is open. The name of innovation and creation is called: thermocouple (China Patent No.: the ZL201220006445.7 fixed online for blast furnace, the applying date: 2012-01-09) and the thermocouple (China Patent No.: ZL201420711679.0, the applying date: 2014-11-24) installed online of a kind of blast furnace crucibe[1-2], although improve installation method and the erecting device of blast furnace thermocouple, but after installing, the error of thermocouple is bigger, it is difficult to reach the requirement of on-the-spot application.
List of references:
[1] Baoshan Iron & Steel Co., Ltd. for the thermocouple that blast furnace is installed online: China, ZL201220006445.7 [P] .2012-10-10.
[2] upper Hypon is full of industrial furnace Engineering Co., Ltd. the thermocouple that a kind of blast furnace crucibe is installed online: China, ZL201420711679.0 [P] .2015-03-25.
Summary of the invention
1. invention to solve the technical problem that
The purpose of the present invention is exactly that to solve the measurement error of the thermocouple after blast furnace in prior art is changed big, make thermocouple cannot go out the temperature of carbon brick by actual response, the online mounting process of a kind of blast furnace thermocouple is provided, thus reducing the measurement error of thermocouple, it is achieved the on-line monitoring of cupola well furnace bottom erosion state.
2. technical scheme
For reaching above-mentioned purpose, technical scheme provided by the invention is:
A kind of online mounting process of the blast furnace thermocouple of the present invention,
Step one: Digitalisation, adopts boring machine to hole from stove epidermis face, when boring is to carbon brick, measures temperature, and to record temperature be t, be installing hole after having holed;
Step 2: install thermocouple, thermocouple is loaded in installing hole, serosity pours into filling gap in installing hole;
Step 3: accuracy detects, after furnace compound wind, after being filled in the grout cures in gap, read the thermometric numerical value of thermocouple after installing, and to record temperature be t, as | (t-t)/t |≤5%, namely determine that the installation of TC is accurate, meet use standard; Otherwise, then reinstall, and repeat step one to step 3.
Further, described step one: specifically comprising the following steps that of boring
A) adopting boring machine to hole in stove epidermis face after blast furnace staying, drill bit sequentially passes through stove skin, filler, cooling wall and ramming mass, and pierces carbon brick, is installing hole after having holed;
B) boring is the first point for measuring temperature in the middle part of carbon brick, and measuring the first point for measuring temperature carbon brick temperature is t1, when boring terminates, it being the end of installing hole, the end of installing hole is the second point for measuring temperature, and measuring the second point for measuring temperature carbon brick temperature is t2; And adopt hairbrush that installing hole is cleared up.
Further, described step 2: install specifically comprising the following steps that of thermocouple
A) pretreatment: by the installation of TC on fixing parts, utilizes syringe to inject serosity on the carbon brick of installing hole end;
B) install: thermocouple is loaded in installing hole with fixing parts, then serosity is poured into filling gap in installing hole.
Further, described step 2: install in thermocouple
A) the specifically comprising the following steps that of pretreatment
A) utilize boring machine to offer thermocouple fixing hole on fixing parts, and by thermocouple fixing hole by the installation of TC on fixing parts; Coated ends at the fixing parts equipped with thermocouple smears slurry coating;
B) adopt distilled water that syringe is carried out; Loading serosity after being completely dried in syringe, inserted by the inlet of syringe in installing hole, until inlet withstands on the carbon brick of installing hole end, serosity is injected the end of installing hole by extruding syringe, sticks on carbon brick, and smears uniformly.
Further, described step 2: install B in thermocouple) specifically comprising the following steps that of installing
A) fixing
The fixing end of trocar sheath is arranged on stove epidermis face, and the first thermocouple, the second thermocouple and fixing parts load installing hole from trocar sheath, and fixing ends withstands on the carbon brick of installing hole end, then the sealing mechanism of trocar sheath sealed end is fixed sealing;
B) evacuation
Vacuum pump is connected with the exit of air bleeding valve, and closes slurry-inlet valve and slurry-supplying valve, open air bleeding valve and carry out evacuation by vacuum pump;
C) grouting
After evacuation completes, close air bleeding valve, open slurry-inlet valve and serosity is poured into filling gap in trocar sheath and installing hole, then open slurry-supplying valve, until grout outlet has serosity to flow out;
D) compacting
Close slurry-supplying valve, increase grouting pressure and reach 0.05-0.1MPa, keep 5-20min.
Further, described step 3: specifically comprising the following steps that of accuracy detection
A) after being filled in the grout cures in gap, reading the registration of the thermocouple after installing, wherein the first thermocouple measuring temperature is t1, the second thermocouple measuring temperature is t2;
B) as | (t1-t1)/t |≤5%, | (t2-t2)/t |≤5%, and | 1-(t2ˊ-t1ˊ)/(t2-t1) |≤10%, namely determine that the installation of TC is accurate, meet use standard; Otherwise, then reinstall, and repeat step one to step 3.
Further, the first thermocouple head end surface and the second thermocouple head end surface be not on same perpendicular.
Further, the first thermocouple head end surface, the second thermocouple head end surface horizontal range identical with the horizontal range of the first point for measuring temperature, the second point for measuring temperature.
Further, the centrage of described trocar sheath and the centrage of installing hole are on same straight line.
Further, trocar sheath with pulp-inlet pipe is provided with the internal and external threads matched, trocar sheath and pulp-inlet pipe are threaded connection.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with existing known technology, have the advantages that
(1) the grout outlet mouth of pipe of the present invention is arranged at grout outlet one end away from sealing mechanism, serosity is made to fill in the process in gap at serosity, only serosity is full of whole gap, serosity just can flow into grout outlet from the grout outlet mouth of pipe, effectively fill the gap of installing hole, it is prevented that serosity filling process produces air gap;
(2) the fixing parts coated ends of the present invention is provided with slurry coating, when slurry coating makes the coated ends of fixing parts be fully contacted with installing hole end, the gas of installing hole end can be effectively discharged out, and by gap effectively, be sufficient filling with, thus effectively eliminating the air gap that serosity filling process produces so that the thermocouple after installation directly contacts with between carbon brick.
(3) the thermometric end of thermocouple is fixed by fixing parts, and fixing parts offer thermocouple fixing hole, the thermometric end of the first thermocouple and the second thermocouple is arranged in thermocouple fixing hole, thus preventing thermocouple at the process deviation pre-installed position installed, one end of fixing parts contacts with installing hole end, it is ensured that the accuracy of position of thermocouple.
(4) in the process of evacuation of the present invention, the gas in grouting mechanism, the slurry coating of fixing parts and the gas being previously implanted in serosity, can precipitate out in the process of evacuation, thus preventing air gap, thus improving the certainty of measurement of the installation of TC;
(5) in the installation method of thermocouple of the present invention, when fixing parts are carried out pretreatment, coated ends at the fixing parts equipped with thermocouple smears slurry coating, and adopt syringe on the carbon brick of installing hole end, it is previously implanted serosity, when fixing parts contact with installing hole end, prevent air gap, serosity is sufficient filling with, thus effectively eliminating the air gap that serosity filling process produces so that thermocouple measuring temperature actual response goes out the temperature of cupola well carbon brick;
(6) the online mounting process of the blast furnace thermocouple of the present invention, creationary is proposed by contrast the front and back temperature difference of point for measuring temperature, two point for measuring temperature temperature difference differences, thus judging the installation of TC whether conformance with standard, it is ensured that the qualified installation of blast furnace thermocouple.
Accompanying drawing explanation
Fig. 1 is the structure schematic diagram that the present invention is arranged on blast furnace furnace wall;
Fig. 2 is the structural representation of the pad of the present invention;
Fig. 3 is the structural representation of the sealing mechanism of the present invention;
A kind of overall structure schematic diagram of the online erecting device of the thermocouple for blast furnace temperature-measuring of Fig. 4 present invention;
The installation of TC method flow diagram of Fig. 5 present invention;
The structural representation of Fig. 6 embodiment of the present invention 4;
The blast furnace thermocouple flow of installation figure of Fig. 7 present invention.
Label declaration in schematic diagram:
1, fixing parts; 21, the first thermocouple; 22, the second thermocouple; 31, grout outlet; 32, the grout outlet mouth of pipe; 33, slurry-supplying valve; 4, trocar sheath; 51, pulp-inlet pipe; 52, slurry-inlet valve; 53, air bleeding valve; 61, the first flange; 62, the second flange; 7, pad; 71, the first fixing hole; 72, the second fixing hole; 73, grout outlet fixing hole; 74, the 3rd fixing hole; 8, stove skin; 9, filler; 10, cooling wall; 11, ramming mass; 12, carbon brick; 13, slurry coating.
Detailed description of the invention
Below in conjunction with embodiment and Figure of description, the present invention is described in detail.
Embodiment 1
In conjunction with Fig. 1,2,3,4,5 and 7, a kind of online erecting device of the thermocouple for blast furnace temperature-measuring of the present invention, including grouting mechanism and sealing mechanism, grouting mechanism is provided with slurry flow port, this slurry flow port discharges unnecessary serosity after filling gap for serosity, and described slurry flow port is located remotely from one end of sealing mechanism; Owing to slurry flow port is located remotely from one end of sealing mechanism, make serosity in the process filling gap, the gas of installing hole can be got rid of completely, only serosity is full of whole gap, serosity just can from slurry flow port, prevent serosity filling process from producing air gap, thus improving the degree of accuracy of thermocouple.
Grouting mechanism includes pulp-inlet pipe 51 and grout outlet 31, and grout outlet 31 is provided with the grout outlet mouth of pipe 32, and the grout outlet mouth of pipe 32 is slurry flow port, and the grout outlet mouth of pipe 32 is arranged at grout outlet 31 one end away from sealing mechanism. Pulp-inlet pipe 51 fills the gap of the online erecting device of thermocouple for serosity introduces grouting mechanism, after serosity fills gap, serosity is flowed into grout outlet 31 by the grout outlet mouth of pipe 32, grout outlet 31 is for discharging unnecessary serosity, owing to the grout outlet mouth of pipe 32 is arranged at grout outlet 31 one end away from sealing mechanism, serosity is made to fill in the process in gap at serosity, only serosity is full of whole gap, serosity just can flow into grout outlet 31 from the grout outlet mouth of pipe 32, effectively fill the gap of installing hole, it is prevented that serosity filling process produces air gap.
The present invention includes fixing parts 1, and the thermometric end of thermocouple is fixed by fixing parts 1, and one end of fixing parts 1 contacts with installing hole end, wherein: described installing hole is the installing hole for installing thermocouple on stove skin 8 surface; Installing hole is to be holed on stove skin 8 surface by boring machine, drill bit sequentially passes through stove skin 8, filler 9, cooling wall 10 and ramming mass 11, and pierce carbon brick 12, installing hole it is after having holed, boring end position is installing hole end, above-mentioned installing hole can be boring machine new hole bored on blast furnace furnace wall, it is also possible to be hole on the position of thermocouple of original damage.Described fixing parts 1 are cylindrical carbon-point, the diameter of the diameter < installing hole of carbon-point, and the circumferential edges place of cylindrical carbon-point offers thermocouple fixing hole.
The thermometric end of thermocouple is fixed by fixing parts 1, and offers 2 thermocouple fixing holes on fixing parts 1, and the thermometric end of the first thermocouple 21 and the second thermocouple 22 is arranged in thermocouple fixing hole. Thus preventing thermocouple at the process deviation pre-installed position installed, one end of fixing parts 1 contacts with installing hole end, it is ensured that the accuracy of position of thermocouple. First thermocouple 21 thermometric end end face and the second thermocouple 22 thermometric end end face be not on same perpendicular. The horizontal range of the first thermocouple 21 thermometric end end face and the second thermocouple 22 thermometric end end face is 100mm.
Fixing parts 1 two ends are respectively arranged with coated ends and slurry output end, the coated ends of fixing parts 1 and installing hole joining distal ends place, coated ends is provided with slurry coating 13, fixing parts 1 are slurry output end away from coated ends, slurry output end is provided with grout outlet 31, and grout outlet 31 is provided with the grout outlet mouth of pipe 32 near the position of fixing parts 1 slurry output end. The coated ends of fixing parts 1 is coated with slurry coating 13, when slurry coating 13 makes the coated ends of fixing parts 1 be fully contacted with installing hole end, it is possible to be effectively discharged out the gas of installing hole end, and by gap effectively, be sufficient filling with; Owing to the grout outlet mouth of pipe 32 of grout outlet 31 is disposed in proximity to fixing parts 1 slurry output end, during grout filling gap, only serosity is full of the gap of installing hole, and serosity just can flow into grout outlet 31 from the grout outlet mouth of pipe 32, effectively fills the gap of installing hole.
The present invention includes grouting mechanism and sealing mechanism, and grouting mechanism includes pulp-inlet pipe 51, grout outlet 31, trocar sheath 4, slurry-inlet valve 52 and air bleeding valve 53; Described trocar sheath 4 is horizontally disposed hollow pipe, the described centrage of trocar sheath 4 and the centrage of installing hole are on same straight line, the two ends of trocar sheath 4 are respectively arranged with fixing end and sealed end, wherein the fixing end of trocar sheath 4 and stove skin 8 are fixedly connected with, the fixing end of trocar sheath 4 adopts to be welded and fixed with stove skin 8 and is connected, and needing the fixing end of detection trocar sheath 4 and the air-tightness of stove skin 8 junction, air-tightness well could normally use; Described trocar sheath 4 is sealed end away from one end of stove skin 8, and sealed end is provided with sealing mechanism;
Being provided with pulp-inlet pipe 51 on described trocar sheath 4, and pulp-inlet pipe 51 is positioned at the top of trocar sheath 4, pulp-inlet pipe 51 is connected with trocar sheath 4, and serosity flows into trocar sheath 4 through pulp-inlet pipe 51, fills the gap of installing hole; Described pulp-inlet pipe 51 is provided with slurry-inlet valve 52 away from one end of trocar sheath 4, the pulp-inlet pipe 51 between above-mentioned slurry-inlet valve 52 and trocar sheath 4 is provided with exhaust branch pipe, and is provided with air bleeding valve 53 on exhaust branch pipe; Grout outlet 31 is tubular structure, grout outlet 31 is extended to the outside of trocar sheath 4 by fixing parts 1 slurry output end along the length direction of trocar sheath 4, and grout outlet 31 fixed by sealing mechanism, grout outlet 31 is provided with slurry-supplying valve 33 away from one end of fixing parts 1, the serosity of fixing parts 1 slurry output end is flowed into grout outlet 31 by the grout outlet mouth of pipe 32, and is discharged by slurry-supplying valve 33. Owing to the grout outlet mouth of pipe 32 is arranged on fixing parts 1 slurry output end, make serosity in filling the process of installing hole and trocar sheath 4, serosity first fills the coated ends that fixing parts 1 contact with installing hole, effectively fill the gap between installing hole and fixing parts 1, after filling, serosity just can flow into grout outlet 31 from the grout outlet mouth of pipe 32, it is prevented that serosity filling process produces air gap.
The exit of vacuum pump with air bleeding valve 53 is connected, and closes slurry-inlet valve 52 and slurry-supplying valve 33, open air bleeding valve 53, by vacuum pump, grouting mechanism is carried out evacuation, thus the gas in grouting mechanism is discharged, it is prevented that in follow-up filling process, gas produces air gap; After evacuation completes, closing air bleeding valve 53, open slurry-inlet valve 52, serosity is poured into filling gap in trocar sheath 4 and installing hole by pulp-inlet pipe 51, and during grouting, pressure reaches 0.005MPa.
Gap in trocar sheath 4 and installing hole has been filled, open slurry-supplying valve 33, serosity at fixing parts 1 slurry output end is flowed into grout outlet 31 by the grout outlet mouth of pipe 32, and discharged by slurry-supplying valve 33, the grout outlet mouth of pipe 32 is disposed in proximity to fixing parts 1 slurry output end, during grout filling gap, serosity can effectively fill the gap of installing hole. The pad 7 of sealing mechanism is provided with grout outlet fixing hole 73, grout outlet 31 traverse grout outlet fixing hole 73, grout outlet 31 is fixed by grout outlet fixing hole 73, thus realizing the sealing mechanism fixation to grout outlet 31, also by grout outlet fixing hole 73, the outside of grout outlet 31 is sealed, it is prevented that serosity overflows from the contact position of grout outlet 31 with pad 7.
Sealing mechanism includes the first flange the 61, second flange 62 and pad 7, and the second described flange 62 and the sealed end of trocar sheath 4 are fixedly connected with, and are provided with pad 7 between described the second flange 62 and the first flange 61. First flange the 61, second flange 62 and pad 7, for being sealed by trocar sheath 4 sealed end, prevent gas leakage in the process of evacuation, on the other hand, it is prevented that serosity overflows from the sealed end of trocar sheath 4 on the one hand.
Described sealing mechanism is provided with fixing hole, in order to fixing thermocouple and grout outlet 31. The pad 7 of sealing mechanism is provided with the first fixing hole the 71, second fixing hole 72 and grout outlet fixing hole 73, first thermocouple the 21, second thermocouple 22 is fixed by first fixing hole the 71, second fixing hole 72, and grout outlet 31 is fixed by grout outlet fixing hole 73. While first thermocouple the 21, second thermocouple 22 is fixed by first fixing hole the 71, second fixing hole 72, also the contact position of pad 7 and first thermocouple the 21, second thermocouple 22 is sealed, it is prevented that serosity overflows from the contact position of first thermocouple the 21, second thermocouple 22 with pad 7.
Being provided with corresponding screw fixed hole uniformly on the circumferential edges position of the first described flange 61 and the circumferential edges position of the second flange 62, first flange the 61, second flange 62 and pad 7 are fixed by screw by screw fixed hole. First flange 61 and the second flange 62 are fixed by screw, and are sealed by trocar sheath 4 by first flange the 61, second flange 62 and pad 7.
Existing blast furnace thermocouple installs equipment, when installing thermocouple post-grouting, slurry cannot effectively fill gap and the aerofluxus of installing hole at thermocouple temperature sensitive head place, cannot directly contact between thermocouple with carbon brick, it is easily generated vent plug, easily cause the installation of TC inaccurate, thermocouple heat conduction, thermometric are made a big impact, make thermocouple that the measurement error of blast furnace crucibe, bottom temperature is big, make can not on-line monitoring cupola well furnace bottom erosion state timely, bring serious potential safety hazard to blast fumance.
As it is shown in figure 5, the installation method of the thermocouple of the present invention, it specifically comprises the following steps that
Step one: boring
Adopt boring machine to hole from stove skin 8 surface, after having holed, be installing hole;Specifically comprising the following steps that of boring
A) adopting boring machine to hole on stove skin 8 surface after blast furnace staying, drill bit sequentially passes through stove skin 8, filler 9, cooling wall 10 and ramming mass 11, and pierces carbon brick 12, is installing hole after having holed; Boring end position is installing hole end, and the horizontal range on installing hole end distance stove skin 8 surface is 565mm, and the diameter of installing hole is 30mm.
B) adopt hairbrush that installing hole is cleared up. The particulate matter produced in boring procedure is removed.
Step 2: install thermocouple
Being loaded by thermocouple in installing hole, serosity pours into filling gap in installing hole, namely completes to install after grout cures. Specifically comprising the following steps that of thermocouple is installed
A) pretreatment: by the installation of TC on fixing parts 1, utilizes syringe to inject serosity on the carbon brick of installing hole end; Detailed step is as follows:
A) utilize boring machine to offer thermocouple fixing hole on fixing parts 1, and by thermocouple fixing hole by the installation of TC on fixing parts 1; Coated ends at the fixing parts 1 equipped with thermocouple smears slurry coating 13, and slurry coating 13 is coated with 1-2cm3Serosity;
B) adopt distilled water that syringe is carried out; In syringe, 5cm is loaded after being completely dried3Serosity, the inlet of syringe is inserted in installing hole, until inlet withstands on the carbon brick 12 of installing hole end, serosity is injected the end of installing hole by extruding syringe, in the process of injection slurry, first according to a direction, syringe is rotated 720 degree, and then opposite direction rotates 720 degree again, and the injection rate of serosity is 4cm3, serosity sticks on carbon brick 12 and smears uniformly.
B) install: thermocouple is loaded in installing hole with fixing parts 1, then serosity is poured into filling gap in installing hole; Detailed step is as follows:
A) fixing
The fixing end of trocar sheath 4 is arranged on stove skin 8 surface, described trocar sheath 4 is arranged on stove skin 8 surface by being welded and fixed, first thermocouple the 21, second thermocouple 22 and fixing parts 1 load installing hole from trocar sheath 4, the coated ends end of fixing parts 1 withstands on the carbon brick 12 of installing hole end, the sealing mechanism of trocar sheath 4 sealed end is fixed sealing again, and detects the air-tightness on sealing mechanism, trocar sheath 4 and stove skin 8 surface; After installation, the horizontal range on the first thermocouple 21 thermometric end end face and stove skin 8 surface is 465mm, and second thermocouple 22 horizontal range apart from stove skin 8 surface is 565mm; The horizontal range of the first thermocouple 21 thermometric end end face and the second thermocouple 22 thermometric end end face is 100mm.
B) evacuation
The exit of vacuum pump with air bleeding valve 53 is connected, and closes slurry-inlet valve 52 and slurry-supplying valve 33, open air bleeding valve 53 and carry out evacuation by vacuum pump; In the process of evacuation, the gas in grouting mechanism, fixing the slurry coating 13 of parts 1 and the gas being previously implanted in serosity, precipitating out in the process of evacuation, thus preventing air gap.
C) grouting
After evacuation completes, close air bleeding valve 53, open slurry-inlet valve 52 and serosity is poured into filling gap in trocar sheath 4 and installing hole, when pressure reaches 0.005MPa when grouting, open slurry-supplying valve 33, until grout outlet 31 has serosity to flow out;
D) compacting
Close slurry-supplying valve 33, increase grouting pressure and reach 0.05MPa, keep 5min;
After furnace compound wind, after being filled in the grout cures in gap, namely complete to install.
Due to the fact that the grout outlet mouth of pipe 32 is arranged at grout outlet 31 one end away from sealing mechanism, serosity is made to fill in the process in gap at serosity, only serosity is full of whole gap, serosity just can flow into grout outlet 31 from the grout outlet mouth of pipe 32, effectively fill the gap of installing hole, it is prevented that serosity filling process produces air gap;Fixing parts 1 coated ends is provided with slurry coating 13, when slurry coating 13 makes the coated ends of fixing parts 1 be fully contacted with installing hole end, the gas of installing hole end can be effectively discharged out, and by gap effectively, be sufficient filling with, thus effectively eliminating the air gap that serosity filling process produces, thermocouple after installing directly is contacted with between carbon brick, improves the degree of accuracy of thermometric so that the temperature actual response installing thermocouple measurement goes out the temperature of cupola well carbon brick.
In addition, the installation method of the thermocouple of the present invention, when fixing parts 1 are carried out pretreatment, the coated ends at the fixing parts 1 equipped with thermocouple smears slurry coating 13, and adopts syringe on the carbon brick 12 of installing hole end, it is previously implanted serosity, when fixing parts 1 contact with installing hole end, it is prevented that produce air gap so that serosity is sufficient filling with, thus effectively eliminating the air gap that serosity filling process produces so that the temperature actual response of thermocouple measurement goes out the temperature of cupola well carbon brick.
In conjunction with Fig. 7, blast furnace thermocouple is changed in execute-in-place process: the online mounting process of blast furnace thermocouple, specifically comprises the following steps that
Step one: Digitalisation, adopts boring machine to hole from stove skin 8 surface, when boring is to carbon brick 12, measures temperature, and to record temperature be t, be installing hole after having holed; Detailed step is as follows:
A) adopting boring machine to hole on stove skin 8 surface after blast furnace staying, drill bit sequentially passes through stove skin 8, filler 9, cooling wall 10 and ramming mass 11, and pierces carbon brick 12, is installing hole after having holed;
B) boring is the first point for measuring temperature in the middle part of carbon brick 12, and the horizontal range on the first point for measuring temperature and stove skin 8 surface is 465mm, and measuring the first point for measuring temperature carbon brick 12 temperature is t1, when boring terminates, it being the end of installing hole, the end of installing hole is the second point for measuring temperature, and the horizontal range on the second point for measuring temperature and stove skin 8 surface is 565mm, and measuring the second point for measuring temperature carbon brick 12 temperature is t2; By temperature t1And t2Record as shown in table 1, and adopts hairbrush that installing hole is cleared up.
Step 2: install thermocouple
Being loaded by thermocouple in installing hole, serosity pours into filling gap in installing hole, namely completes to install after grout cures. Specifically comprising the following steps that of thermocouple is installed
A) pretreatment: by the installation of TC on fixing parts 1, utilizes syringe to inject serosity on the carbon brick of installing hole end; Detailed step is as follows:
A) utilize boring machine to offer thermocouple fixing hole on fixing parts 1, and by thermocouple fixing hole by the installation of TC on fixing parts 1; Coated ends at the fixing parts 1 equipped with thermocouple smears slurry coating 13, and slurry coating 13 is coated with 1-2cm3Serosity;
B) adopt distilled water that syringe is carried out; In syringe, 5cm is loaded after being completely dried3Serosity, the inlet of syringe is inserted in installing hole, until inlet withstands on the carbon brick 12 of installing hole end, serosity is injected the end of installing hole by extruding syringe, in the process of injection slurry, first according to a direction, syringe is rotated 720 degree, and then opposite direction rotates 720 degree again, and the injection rate of serosity is 4cm3, serosity sticks on carbon brick 12 and smears uniformly.
B) install: thermocouple is loaded in installing hole with fixing parts 1, then serosity is poured into filling gap in installing hole; Detailed step is as follows:
A) fixing
The fixing end of trocar sheath 4 is arranged on stove skin 8 surface, described trocar sheath 4 is arranged on stove skin 8 surface by being welded and fixed, first thermocouple the 21, second thermocouple 22 and fixing parts 1 load installing hole from trocar sheath 4, the coated ends end of fixing parts 1 withstands on the carbon brick 12 of installing hole end, the sealing mechanism of trocar sheath 4 sealed end is fixed sealing again, and detects the air-tightness on sealing mechanism, trocar sheath 4 and stove skin 8 surface;After installation, the horizontal range on the first thermocouple 21 thermometric end end face and stove skin 8 surface is 465mm, and second thermocouple 22 horizontal range apart from stove skin 8 surface is 565mm; The horizontal range of the first thermocouple 21 thermometric end end face and the second thermocouple 22 thermometric end end face is 100mm.
B) evacuation
The exit of vacuum pump with air bleeding valve 53 is connected, and closes slurry-inlet valve 52 and slurry-supplying valve 33, open air bleeding valve 53 and carry out evacuation by vacuum pump; In the process of evacuation, the gas in grouting mechanism, fixing the slurry coating 13 of parts 1 and the gas being previously implanted in serosity, precipitating out in the process of evacuation, thus preventing air gap.
C) grouting
After evacuation completes, close air bleeding valve 53, open slurry-inlet valve 52 and serosity is poured into filling gap in trocar sheath 4 and installing hole, when pressure reaches 0.005MPa when grouting, open slurry-supplying valve 33, until grout outlet 31 has serosity to flow out;
D) compacting
Close slurry-supplying valve 33, increase grouting pressure and reach 0.05MPa, keep 5min;
Step 3: accuracy detects,
A) after being filled in the grout cures in gap, reading the registration of the thermocouple after installing, wherein the first thermocouple 21 measures temperature is t1, it is t that the second thermocouple 22 measures temperature2;
B) as | (t1-t1)/t |≤5%, | (t2-t2)/t |≤5%, and | 1-(t2ˊ-t1ˊ)/(t2-t1) |≤10%, namely determine that the installation of TC is accurate, meet use standard; Otherwise, then reinstall, and repeat step one to step 3.
Comparative example 1
The substance of this comparative example is with embodiment 1, it is different in that: the step 2 of the online mounting process of blast furnace thermocouple: adopt innovation and creation: the thermocouple (patent No. ZL201220006445.7) installed online for blast furnace carries out blast furnace thermocouple installation, after installation, the temperature of the first point for measuring temperature thermocouple that horizontal range is 465mm on recording distance stove skin 8 surface is t1, the temperature of the second point for measuring temperature thermocouple that horizontal range is 565mm on recording distance stove skin 8 surface is t2, record is as shown in table 1.
The thermometric numerical value of thermocouple installed by table 1
| Insertion depth | Measure temperature | Embodiment 1 | Comparative example 1 |
| First point for measuring temperature (465mm) | 174 | 177 | 157 |
| Second point for measuring temperature (565mm) | 273 | 270 | 234 |
| The temperature difference | 101 | 93 | 77 |
| |(t1-t1ˊ)/t1| | —— | 1.7% | 9.8% |
| |(t2-t2ˊ)/t2| | —— | 1.1% | 14.3% |
| |1-(t2ˊ-t1ˊ)/(t2-t1)| | —— | 7.9% | 23.8% |
As shown in Table 1, embodiment 1 | (t1-t1ˊ)/t1|=1.7% < 5%, | (t2-t2ˊ)/t2|=1.5% < 5%, and | 1-(t2ˊ-t1ˊ)/(t2-t1) |=7.9% < 10%, adopt the installation of TC method of embodiment 1, the installation of TC is accurate, meets use standard. And comparative example 1 | (t1-t1)/t |=9.7% > 5%, | (t2-t2)/t |=14.3% > 5%, and | 1-(t2ˊ-t1ˊ)/(t2-t1) |=23.8% > 10%, adopt the installation of TC method of comparative example 1, the installation of TC is inaccurate, does not meet use standard. Then reinstall, and repeat step one to step 3.
|(t1-t1)/t |=9.7% > 5%, | (t2-t2)/t |=14.3% > 5%, and | 1-(t2ˊ-t1ˊ)/(t2-t1) |=13.8% > 10%, the thermocouple error that comparative example 1 is installed is bigger, its reason is in that: when thermocouple equipment installs thermocouple post-grouting, slurry cannot effectively fill gap and the aerofluxus of perforate at thermocouple temperature sensitive head place, cannot directly contact between thermocouple with carbon brick, it is easily generated vent plug, causes heat transfer not smooth; Thus causing the thermocouple after installation, temperature measurement error is relatively big, thus the temperature measured also cannot go out the temperature of cupola well, furnace bottom carbon brick by actual response.
The present embodiment is installed in thermocouple process at blast furnace, is effectively prevented generation air gap so that serosity is sufficient filling with, thus effectively eliminating the air gap that serosity filling process produces so that the temperature actual response of thermocouple measurement goes out the temperature of cupola well carbon brick.
Additionally, existing blast furnace thermocouple mounting process, it is difficult to effectively judging after the installation of TC whether conformance with standard, after often resulting in the installation of TC, error is relatively greatly, and staff does not know to exist error also;The online mounting process of the blast furnace thermocouple of the present invention, creationary it is proposed by the contrast front and back temperature difference of point for measuring temperature, two point for measuring temperature temperature difference differences, thus judging whether the installation of TC meets working condition requirement, ensure that the qualified installation of blast furnace thermocouple, thus monitoring blast furnace crucibe, furnace bottom carbon brick temperature accurately and effectively.
Embodiment 2
The substance of the present embodiment is with embodiment 1, and it is different in that: in compacting process, closes slurry-supplying valve 33, increases grouting pressure and reaches 0.08MPa, keeps 20min; Trocar sheath 4 with pulp-inlet pipe 51 is provided with the internal and external threads matched, trocar sheath 4 and pulp-inlet pipe 51 are threaded connection, and detect the air-tightness of trocar sheath 4 and pulp-inlet pipe 51.
The horizontal range on the first thermocouple 21 thermometric end end face and stove skin 8 surface is 515mm, and second thermocouple 22 horizontal range apart from stove skin 8 surface is 565mm; The horizontal range of the first thermocouple 21 thermometric end end face and the second thermocouple 22 thermometric end end face is 50mm. The horizontal range on the first point for measuring temperature and stove skin 8 surface is 515mm, first point for measuring temperature and the first thermocouple 21 thermometric end end face are positioned at same vertical position, the horizontal range on the second point for measuring temperature and stove skin 8 surface is 565mm, and the second point for measuring temperature and the second thermocouple 22 thermometric end end face are positioned at same vertical position. In installation process, measure t and t record as shown in table 2.
The thermometric numerical value of thermocouple installed by table 2
| Insertion depth | Measure temperature | Embodiment 1 |
| First point for measuring temperature (515mm) | 215 | 209 |
| Second point for measuring temperature (565mm) | 275 | 273 |
| The temperature difference | 60 | 64 |
| |(t1-t1ˊ)/t1| | —— | 2.8% |
| |(t2-t2ˊ)/t2| | —— | 0.7% |
| |1-(t2ˊ-t1ˊ)/(t2-t1)| | —— | 6.7% |
As shown in Table 2, embodiment 1 | (t1-t1ˊ)/t1|=2.8% < 5%, | (t2-t2ˊ)/t2|=0.7% < 5%, and | 1-(t2ˊ-t1ˊ)/(t2-t1) |=6.7% < 10%, adopt the installation of TC method of embodiment 2, the installation of TC is accurate, meets use standard.
Embodiment 3
The substance of the present embodiment is with embodiment 1, and it is different in that: in compacting process, closes slurry-supplying valve 33, increases grouting pressure and reaches 0.1MPa, keeps 15min. The horizontal range on the first thermocouple 21 thermometric end end face and stove skin 8 surface is 415mm, and second thermocouple 22 horizontal range apart from stove skin 8 surface is 565mm; The horizontal range of the first thermocouple 21 thermometric end end face and the second thermocouple 22 thermometric end end face is 150mm. In installation process, the horizontal range on the first point for measuring temperature and stove skin 8 surface is 415mm, first point for measuring temperature and the first thermocouple 21 thermometric end end face are positioned at same vertical position, the horizontal range on the second point for measuring temperature and stove skin 8 surface is 565mm, and the second point for measuring temperature and the second thermocouple 22 thermometric end end face are positioned at same vertical position. In installation process, measure t and t record as shown in table 3.
The thermometric numerical value of thermocouple installed by table 3
| Insertion depth | Measure temperature | Embodiment 1 |
| First point for measuring temperature (415mm) | 116 | 112 |
| Second point for measuring temperature (565mm) | 272 | 269 |
| The temperature difference | 156 | 158 |
| |(t1-t1ˊ)/t1| | —— | 3.4% |
| |(t2-t2ˊ)/t2| | —— | 1.1% |
| |1-(t2ˊ-t1ˊ)/(t2-t1)| | —— | 1.3% |
As shown in Table 3, embodiment 1 | (t1-t1ˊ)/t1|=3.4% < 5%, | (t2-t2ˊ)/t2|=1.1% < 5%, and | 1-(t2ˊ-t1ˊ)/(t2-t1) |=1.3% < 10%, adopt the installation of TC method of embodiment 3, the installation of TC is accurate, meets use standard.
Embodiment 4
The substance of the present embodiment is with embodiment 1, it is different in that: as shown in Figure 6, fixing parts 1 offer 3 thermocouple fixing holes, the thermometric end of first thermocouple the 21, second thermocouple 22 and three thermocouple is arranged in thermocouple fixing hole, and offers first fixing hole the 71, second fixing hole 72, grout outlet fixing hole 73 and the 3rd fixing hole 74 on pad 7;First thermocouple the 21, second thermocouple 22 and three thermocouple are fixed respectively through first fixing hole the 71, second fixing hole 72 and the 3rd fixing hole 74.
The horizontal range on the first thermocouple 21 thermometric end end face and stove skin 8 surface is 415mm, and second thermocouple 22 horizontal range apart from stove skin 8 surface is 515mm, and the horizontal range on three thermocouple distance stove skin 8 surface is 565mm; The horizontal range of the first thermocouple 21 thermometric end end face and three thermocouple 22 thermometric end end face is 150mm. In installation process, the horizontal range on the first point for measuring temperature and stove skin 8 surface is 415mm, first point for measuring temperature and the first thermocouple 21 thermometric end end face are positioned at same vertical position, the horizontal range on the second point for measuring temperature and stove skin 8 surface is 515mm, and the second point for measuring temperature and the second thermocouple 22 thermometric end end face are positioned at same vertical position; The horizontal range on the 3rd point for measuring temperature and stove skin 8 surface is 565mm, and the 3rd point for measuring temperature and three thermocouple thermometric end end face are positioned at same vertical position. In installation process, measure t and t record as shown in table 4.
The thermometric numerical value of thermocouple installed by table 4
| Insertion depth | Measure temperature | Embodiment 1 |
| First point for measuring temperature (415mm) | 117 | 112 |
| Second point for measuring temperature (515mm) | 214 | 213 |
| 3rd point for measuring temperature (565mm) | 272 | 275 |
| |(t1-t1ˊ)/t1| | —— | 4.3% |
| |(t2-t2ˊ)/t2| | —— | 0.5% |
| |(t3-t3ˊ)/t3| | —— | 1.1% |
| |1-(t3ˊ-t1ˊ)/(t3-t1)| | —— | 5.2% |
| |1-(t3ˊ-t2ˊ)/(t3-t2)| | —— | 6.9% |
As shown in Table 4, embodiment 1 | (t1-t1)/t1 |=4.3% < 5%, | (t2-t2)/t2 |=0.4% < 5%, | (t3-t3)/t2 |=1.1% < 5%, and | 1-(t3ˊ-t1ˊ)/(t3-t1) |=5.2% < 10%, | 1-(t3ˊ-t2ˊ)/(t3-t2) |=6.9% < 10%, adopt the installation of TC method of embodiment 4, the installation of TC is accurate, meets use standard.
Schematically the present invention and embodiment thereof being described above, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited thereto. So, if those of ordinary skill in the art is enlightened by it, when without departing from the invention objective, design the frame mode similar to this technical scheme and embodiment without creationary, protection scope of the present invention all should be belonged to.
Claims (10)
1. the online mounting process of a blast furnace thermocouple, it is characterised in that:
Step one: Digitalisation, adopts boring machine to hole from stove skin (8) surface, when boring is to carbon brick (12), measures temperature, and to record temperature be t, be installing hole after having holed;
Step 2: install thermocouple, thermocouple is loaded in installing hole, serosity pours into filling gap in installing hole;
Step 3: accuracy detects, after furnace compound wind, after being filled in the grout cures in gap, read the thermometric numerical value of thermocouple after installing, and to record temperature be t, as | (t-t)/t |≤5%, namely determine that the installation of TC is accurate, meet use standard; Otherwise, then reinstall, and repeat step one to step 3.
2. the online mounting process of a kind of blast furnace thermocouple according to claim 1, it is characterised in that: described step one: specifically comprising the following steps that of boring
A) boring machine is adopted to hole on stove skin (8) surface after blast furnace staying, drill bit sequentially passes through stove skin (8), filler (9), cooling wall (10) and ramming mass (11), and pierce carbon brick (12), it is installing hole after having holed;
B) boring is the first point for measuring temperature to carbon brick (12) middle part, and measuring the first point for measuring temperature carbon brick (12) temperature is t1, when boring terminates, it being the end of installing hole, the end of installing hole is the second point for measuring temperature, and measuring the second point for measuring temperature carbon brick (12) temperature is t2;And adopt hairbrush that installing hole is cleared up.
3. the online mounting process of a kind of blast furnace thermocouple according to claim 1 and 2, it is characterised in that:
Described step 2: install specifically comprising the following steps that of thermocouple
A) pretreatment: by the installation of TC on fixing parts (1), utilizes syringe to inject serosity on the carbon brick of installing hole end;
B) install: thermocouple is loaded in installing hole with fixing parts (1), then serosity is poured into filling gap in installing hole.
4. the online mounting process of a kind of blast furnace thermocouple according to claim 3, it is characterised in that:
Described step 2: install A in thermocouple) the specifically comprising the following steps that of pretreatment
A) utilize boring machine to offer thermocouple fixing hole on fixing parts (1), and by thermocouple fixing hole by the installation of TC on fixing parts (1); Coated ends at the fixing parts (1) equipped with thermocouple smears slurry coating (13);
B) adopt distilled water that syringe is carried out; In syringe, serosity is loaded after being completely dried, being inserted by the inlet of syringe in installing hole, until inlet withstands on the carbon brick (12) of installing hole end, serosity is injected the end of installing hole by extruding syringe, stick on carbon brick (12), and smear uniformly.
5. the online mounting process of a kind of blast furnace thermocouple according to claim 4, it is characterised in that:
Described step 2: install B in thermocouple) specifically comprising the following steps that of installing
A) fixing
The fixing end of trocar sheath (4) is arranged on stove skin (8) surface, first thermocouple (21), the second thermocouple (22) and fixing parts (1) load installing hole from trocar sheath (4), fixing parts (1) end withstands on the carbon brick (12) of installing hole end, then the sealing mechanism of trocar sheath (4) sealed end is fixed sealing;
B) evacuation
The exit of vacuum pump with air bleeding valve (53) is connected, and closes slurry-inlet valve (52) and slurry-supplying valve (33), open air bleeding valve (53) and carry out evacuation by vacuum pump;
C) grouting
After evacuation completes, close air bleeding valve (53), open slurry-inlet valve (52) and serosity is poured into filling gap in trocar sheath (4) and installing hole, then open slurry-supplying valve (33), until grout outlet (31) has serosity to flow out;
D) compacting
Close slurry-supplying valve (33), increase grouting pressure and reach 0.05-0.1MPa, keep 5-20min.
6. the online mounting process of a kind of blast furnace thermocouple according to claim 5, it is characterised in that: described step 3: specifically comprising the following steps that of accuracy detection
A) after being filled in the grout cures in gap, reading the registration of the thermocouple after installing, wherein the first thermocouple (21) measures temperature is t1, it is t that the second thermocouple (22) measures temperature2;
B) as | (t1-t1)/t |≤5%, | (t2-t2)/t |≤5%, and | 1-(t2ˊ-t1ˊ)/(t2-t1) |≤10%, namely determine that the installation of TC is accurate, meet use standard; Otherwise, then reinstall, and repeat step one to step 3.
7. the online mounting process of a kind of blast furnace thermocouple according to claim 6, it is characterised in that: the first thermocouple (21) head end and the second thermocouple (22) head end be not on same perpendicular.
8. the online mounting process of a kind of blast furnace thermocouple according to claim 7, it is characterised in that: the first thermocouple (21) head end, the second thermocouple (22) head end horizontal range identical with the horizontal range of the first point for measuring temperature, the second point for measuring temperature.
9. the online mounting process of a kind of blast furnace thermocouple according to claim 5-8, it is characterised in that: the centrage of described trocar sheath (4) and the centrage of installing hole are on same straight line.
10. the online mounting process of a kind of blast furnace thermocouple according to claim 9, it is characterized in that: trocar sheath (4) with pulp-inlet pipe (51) is provided with the internal and external threads matched, trocar sheath (4) and pulp-inlet pipe (51) are threaded connection.
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| CN111334630A (en) * | 2020-04-10 | 2020-06-26 | 北京首钢股份有限公司 | Blast furnace thermocouple repairing method |
| CN111809013A (en) * | 2020-07-10 | 2020-10-23 | 首钢集团有限公司 | Online installation method for blast furnace hearth thermocouple |
| CN115283625A (en) * | 2022-10-10 | 2022-11-04 | 中信戴卡股份有限公司 | Mold temperature acquisition system in aluminum wheel casting process and mold manufacturing method |
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| CN115283625A (en) * | 2022-10-10 | 2022-11-04 | 中信戴卡股份有限公司 | Mold temperature acquisition system in aluminum wheel casting process and mold manufacturing method |
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