CN105671232B - A kind of online mounting process of blast furnace thermocouple - Google Patents
A kind of online mounting process of blast furnace thermocouple Download PDFInfo
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- CN105671232B CN105671232B CN201610214516.5A CN201610214516A CN105671232B CN 105671232 B CN105671232 B CN 105671232B CN 201610214516 A CN201610214516 A CN 201610214516A CN 105671232 B CN105671232 B CN 105671232B
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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 a kind of online mounting process of blast furnace thermocouple, belong to blast furnace temperature detection field in metallurgy industry.The step one of the present invention：Digitalisation is drilled using drilling machine from stove epidermis face, when drilling to carbon brick, measures temperature, and records temperature as t, is mounting hole after the completion of drilling；Step 2：Thermocouple is installed, thermocouple is fitted into mounting hole, slurries, which pour into, fills gap in mounting hole；Step 3：Accuracy detects, and after being filled in the grout cures in gap, reads the thermometric numerical value of the thermocouple after installation, and records temperature as t ˊ, when | (t t ˊ)/t |≤5%, that is, determine that the installation of TC is accurate, meets using standard；Otherwise, then it reinstalls, and repeats step 1 to step 3.The present invention, so as to judge whether the installation of TC complies with standard, ensure that the qualified installation of blast furnace thermocouple by comparing the front and rear temperature difference of temperature measuring point, two temperature measuring point temperature difference differences.
Description
Technical field
The present invention relates to blast furnace temperature detection field in metallurgy industry, more specifically to a kind of blast furnace thermoelectricity
Even online mounting process.
Background technology
Blast furnace is the important component of integrated iron and steel works, and blast-furnace technique economic indicator is good, simple for process, output
Greatly, labor productivity is high, and low energy consumption, and the pig iron of production accounts for more than the 95% of world iron total output.Nowadays, prolonging campaign is existing
For the target that blast furnace is pursued, prolonging campaign means that the raising of economic benefit.Wherein, blast furnace crucibe, furnace bottom are blast furnace lifes
Production safety and the long-lived most important thing, from current statistics, domestic and international blast furnace crucibe burn-through mostly occurs in side wall or side wall and stove
The corner at bottom, at once interior elephant foot attack sites being commonly called as.
At present, blast furnace crucibe, furnace bottom state mainly judge the residual thickness of cupola well by thermocouple detection temperature to calculate.Cause
This, cupola well, bottom temperature on-line monitoring have become the important means of monitoring cupola well furnace bottom erosion state and have established cupola well furnace bottom
Liner corrodes condition necessary to mathematical model.For blast furnace when newly-built, furnace bottom and bosh gas index all bury a certain number of thermoelectricity
Even, but the adverse circumstances with the passage of production and cupola well in itself, originally the installation site of pre-buried thermocouple is deviateed,
The temperature of detection lacks authenticity and validity, and the failure of cupola well galvanic couple undoubtedly brings many blind areas to the monitoring of cupola well state, gives
Brick lining in blast furnace chamber corrodes monitoring and production safety brings hidden danger.
Moreover, because directly thermocouple can not be inserted into carbon brick, the drilling installation thermocouple usually on carbon brick, but adopt
Drilled installation thermocouple with existing technology on blast furnace, easily causes the installation of TC inaccuracy, thermocouple heat conduction, thermometric are made
Into very big influence so that thermocouple is big to the measurement error of blast furnace crucibe, bottom temperature so that cannot timely monitor stove on-line
Cylinder furnace bottom erosion state.Serious security risk is brought to blast fumance, this technical problem is urgently to be resolved hurrily.
Through retrieval, existing related art scheme discloses.Innovation and creation it is entitled：For blast furnace fixed thermocouple online
(China Patent No.：ZL201220006445.7, the applying date：A kind of 2012-01-09) the thermocouple installed online with blast furnace crucibe
(China Patent No.：ZL201420711679.0, the applying date：2014-11-24)[1-2]Although improve the installation of blast furnace thermocouple
Method and erecting device, but the error of thermocouple is larger after installing, it is difficult to reach the requirement of field application.
Bibliography：
[1] Baoshan Iron ＆ Steel Co., Ltd is used for the thermocouple that blast furnace is installed online：China,
ZL201220006445.7[P].2012-10-10.
[2] Hypon is full of the thermocouple that a kind of industrial furnace Engineering Co., Ltd blast furnace crucibes of are installed online on：China,
ZL201420711679.0[P].2015-03-25.
Invention content
1. technical problems to be solved by the inivention
The purpose of the present invention be exactly solve in the prior art blast furnace replace after thermocouple measurement error it is big so that thermoelectricity
Occasionally can not actual response go out the temperature of carbon brick, a kind of online mounting process of blast furnace thermocouple is provided, so as to reduce thermoelectricity
Even measurement error realizes the on-line monitoring of cupola well furnace bottom erosion state.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
A kind of online mounting process of blast furnace thermocouple of the present invention,
Step 1：Digitalisation is drilled using drilling machine from stove epidermis face, when drilling to carbon brick, measures temperature, and
Record temperature is t, is mounting hole after the completion of drilling；
Step 2：Thermocouple is installed, thermocouple is fitted into mounting hole, slurries, which pour into, fills gap in mounting hole；
Step 3：Accuracy detects, and after furnace compound wind, after being filled in the grout cures in gap, reads the heat after installation
The thermometric numerical value of galvanic couple, and temperature is recorded as t ˊ, when | (t-t ˊ)/t |≤5%, that is, determine that the installation of TC is accurate, meets use
Standard；Otherwise, then it reinstalls, and repeats step 1 to step 3.
Further, the step one：Drilling is as follows：
A it) is drilled after blast furnace staying using drilling machine in stove epidermis face, drill bit sequentially passes through stove skin, filler, cooling
Wall and ramming mass, and carbon brick is pierced, it is mounting hole after the completion of drilling；
B it is) the first temperature measuring point in the middle part of drilling to carbon brick, the first temperature measuring point carbon brick temperature of measurement is t1, at the end of drilling, i.e.,
For the end of mounting hole, the end of mounting hole is the second temperature measuring point, and the second temperature measuring point carbon brick temperature of measurement is t2；And using hairbrush
Mounting hole is cleared up.
Further, the step two：Installation thermocouple is as follows：
A it) pre-processes：By the installation of TC in fixed component, injected on the carbon brick of installation bore end using injection-tube
Slurries；
B it) installs：Thermocouple is fitted into fixed component in mounting hole, then slurries is poured into, gap is filled in mounting hole.
Further, the step two：It installs in thermocouple
A) pretreatment is as follows：
A) thermocouple mounting hole is opened up in fixed component using drilling machine, and passes through thermocouple mounting hole and pacifies thermocouple
In fixed component；Slurry coating is smeared in the coated ends of the fixed component equipped with thermocouple；
B) injection-tube is cleaned using distilled water；Slurries are packed into after being completely dried in injection-tube, by injection-tube
Inlet is inserted into mounting hole, until inlet is withstood on the carbon brick of installation bore end, is squeezed injection-tube and is installed slurries injection
The end in hole, is adhered on carbon brick, and smears uniform.
Further, the step two：Installation thermocouple in B) installation be as follows：
A) it is fixed
The fixing end of outer tube is mounted on stove epidermis face, the first thermocouple, the second thermocouple and fixed component are from housing
Pipe is fitted into mounting hole, and fixed component end is withstood on the carbon brick of installation bore end, then the sealing mechanism by outer tube sealed end
Sealing is fixed；
B) it vacuumizes
Vacuum pump with the exit of air bleeding valve is connected, and close slurry-inlet valve and slurry-supplying valve, air bleeding valve is opened and passes through vacuum
Pump is vacuumized；
C) it is in the milk
After vacuumizing completion, air bleeding valve is closed, slurry-inlet valve is opened and pours into slurries in outer tube and mounting hole between filling
Gap then opens slurry-supplying valve, until grout outlet has slurries outflow；
D) it is compacted
Slurry-supplying valve is closed, increase grouting pressure reaches 0.05-0.1MPa, keeps 5-20min.
Further, the step three：Accuracy detection is as follows：
A after) being filled in the grout cures in gap, the registration of the thermocouple after installation is read, wherein the first thermocouple is surveyed
Amount temperature is t1ˊ, the second thermocouple measuring temperature are t2ˊ；
B) as | (t1-t1ˊ)/t |≤5%, | (t2-t2ˊ)/t |≤5%, and | 1- (t2ˊ-t1ˊ)/(t2-t1) |≤10%, i.e.,
It determines that the installation of TC is accurate, meets using standard；Otherwise, then it reinstalls, and repeats step 1 to step 3.
Further, the first thermocouple head end surface and the second thermocouple head end surface be not on same perpendicular.
Further, horizontal distance and the first thermometric of the first thermocouple head end surface, the second thermocouple head end surface
Point, the horizontal distance of the second temperature measuring point are identical.
Further, the center line of the outer tube and the center line of mounting hole are on same straight line.
Further, matched internal and external threads are provided on outer tube and inlet pipe, outer tube passes through with inlet pipe
It is threadedly coupled.
3. advantageous effect
Using technical solution provided by the invention, compared with existing known technology, have the advantages that：
(1) grout outlet nozzle of the invention is set to the one end of grout outlet far from sealing mechanism so that slurries are filled out in slurries
During filling gap, only slurries are full of entire gap, and slurries can just flow into grout outlet, effectively filling peace from grout outlet nozzle
The gap in hole is filled, prevents slurries filling process from generating air gap；
(2) slurry coating is provided in fixed component coated ends of the invention, slurry coating causes the coating of fixed component
When end comes into full contact with installation bore end, the gas of installation bore end can be effectively discharged out, and gap effectively, is fully filled out
It fills, so as to effectively eliminate the air gap of slurries filling process generation so that be in direct contact between the thermocouple and carbon brick after installation.
(3) thermometric end of thermocouple is fixed by fixed component, and thermocouple mounting hole is offered in fixed component,
The thermometric end of first thermocouple and the second thermocouple is mounted in thermocouple mounting hole, so as to prevent thermocouple in the process of installation
Deviate pre-installed position, one end of fixed component is contacted with installation bore end, ensures the accuracy of position of thermocouple.
(4) during the present invention vacuumizes, the gas in mechanism of being in the milk and is previously implanted the slurry coating of fixed component
Gas in slurries can be precipitated during vacuumizing, so as to prevent air gap, so as to improve the measurement of the installation of TC
Precision；
(5) in the installation method of thermocouple of the present invention, when being pre-processed to fixed component, in consolidating equipped with thermocouple
The coated ends for determining component smear slurry coating, and be previously implanted slurries on the carbon brick of installation bore end using injection-tube, solid
Determine component with installation bore end contact when, prevent air gap so that slurries are sufficient filling with, and are filled out so as to effectively eliminate slurries
Fill the air gap of process generation so that thermocouple measuring temperature actual response goes out the temperature of cupola well carbon brick；
(6) the online mounting process of blast furnace thermocouple of the invention, creative proposition is by comparing the front and rear of temperature measuring point
The temperature difference, two temperature measuring point temperature difference differences, so as to judge whether the installation of TC complies with standard, ensure that the qualification of blast furnace thermocouple
Installation.
Description of the drawings
Fig. 1 is the structure schematic diagram that the present invention is mounted on blast furnace furnace wall；
Fig. 2 is the structure diagram of the gasket of the present invention；
Fig. 3 is the structure diagram of the sealing mechanism of the present invention；
A kind of overall structure diagram of the online erecting device of thermocouple for blast furnace temperature-measuring of Fig. 4 present invention；
The installation of TC method flow diagram of Fig. 5 present invention；
The structure diagram 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：
1st, fixed component；21st, the first thermocouple；22nd, the second thermocouple；31st, grout outlet；32nd, grout outlet nozzle；33rd, go out
Starch valve；4th, outer tube；51st, inlet pipe；52nd, slurry-inlet valve；53rd, air bleeding valve；61st, first flange；62nd, second flange；7th, gasket；
71st, the first mounting hole；72nd, the second mounting hole；73rd, grout outlet mounting hole；74th, third mounting hole；8th, stove skin；9th, filler；10th, it is cold
But wall；11st, ramming mass；12nd, carbon brick；13rd, slurry coating.
Specific embodiment
With reference to embodiment and Figure of description, the present invention is described in detail.
Embodiment 1
With reference to Fig. 1,2,3,4,5 and 7, a kind of online erecting device of thermocouple for blast furnace temperature-measuring of the invention, including
Mechanism of being in the milk and sealing mechanism are provided with slurry flow port in grouting mechanism, which fills gap for slurries
After discharge extra slurries, the slurry flow port is located remotely from one end of sealing mechanism；Due to slurry flow port position
In one end far from sealing mechanism so that slurries can exclude the gas of mounting hole completely during gap is filled, only
There are slurries full of entire gap, slurries just can prevent slurries filling process from generating air gap, so as to improve thermoelectricity from slurry flow port
Even accuracy.
Mechanism of being in the milk includes inlet pipe 51 and grout outlet 31, and grout outlet nozzle 32, grout outlet pipe are provided on grout outlet 31
Mouth 32 is slurry flow port, and grout outlet nozzle 32 is set to the one end of grout outlet 31 far from sealing mechanism.Inlet pipe 51 is used for will
Slurries introduce the gap of the grouting mechanism filling online erecting device of thermocouple, and after slurries fill gap, slurries are by grout outlet
Nozzle 32 flows into grout outlet 31, and grout outlet 31 is for discharging extra slurries, since grout outlet nozzle 32 is set to grout outlet 31
One end far from sealing mechanism so that slurries are during slurries fill gap, and only slurries are full of entire gap, and slurries are
Grout outlet 31 can be flowed into from grout outlet nozzle 32, the gap of mounting hole is effectively filled, prevents slurries filling process from generating air gap.
The present invention includes fixed component 1, and the thermometric end of thermocouple is fixed by fixed component 1, and the one of fixed component 1
End is contacted with installation bore end, wherein：The mounting hole is in the mounting hole of 8 surface of stove skin installation thermocouple；Installation
Hole is to be drilled by drilling machine on 8 surface of stove skin, and drill bit sequentially passes through stove skin 8, filler 9, cooling wall 10 and ramming mass 11,
And carbon brick 12 is pierced, it is mounting hole after the completion of drilling, drilling end position is to install bore end, and above-mentioned mounting hole can be with
It is the hole that drilling machine newly bores on blast furnace furnace wall or drills on the position of thermocouple of original damage.Institute
The fixed component 1 stated is cylindrical carbon-point, the diameter of the diameter ＜ mounting holes of carbon-point, is opened up at the circumferential edges of cylindrical carbon-point
There is thermocouple mounting hole.
The thermometric end of thermocouple is fixed by fixed component 1, and 2 thermocouples are offered in fixed component 1 and are fixed
The thermometric end of hole, the first thermocouple 21 and the second thermocouple 22 is mounted in thermocouple mounting hole.So as to prevent thermocouple from pacifying
The process of dress deviates pre-installed position, and one end of fixed component 1 is contacted with installation bore end, ensures the standard of position of thermocouple
True property.First thermocouple, 21 thermometric end end face is with 22 thermometric end end face of the second thermocouple not on same perpendicular.First heat
The horizontal distance of 21 thermometric end end face of galvanic couple and 22 thermometric end end face of the second thermocouple is 100mm.
1 both ends of fixed component are respectively arranged with coated ends and slurry output end, and the coated ends of fixed component 1 are with installing bore end phase
Place is met, slurry coating 13 is provided in coated ends, fixed component 1 is slurry output end far from coated ends, and slurry output end is provided with grout outlet
31, grout outlet 31 is provided with grout outlet nozzle 32 close to the position of 1 slurry output end of fixed component.The coated ends of fixed component 1 are smeared
There is slurry coating 13, it, can be effectively when slurry coating 13 is so that the coated ends of fixed component 1 come into full contact with installation bore end
Discharge installation bore end gas, and by gap effectively, be sufficient filling with；It is leaned on since the grout outlet nozzle 32 of grout outlet 31 is set to
Nearly 1 slurry output end of fixed component, during grout filling gap, only slurries are full of the gap of mounting hole, and slurries just can be from grout outlet pipe
Mouth 32 flows into grout outlets 31, effectively fills the gap of mounting hole.
The present invention includes grouting mechanism and sealing mechanism, grouting mechanism include inlet pipe 51, grout outlet 31, outer tube 4, into
Starch valve 52 and air bleeding valve 53；The outer tube 4 is horizontally disposed hollow pipe, the center line of the outer tube 4 and installation
For the center line in hole on same straight line, the both ends of outer tube 4 are respectively arranged with fixing end and sealed end, wherein outer tube 4
Fixing end is fixedly connected with stove skin 8, and the fixing end of outer tube 4 uses to be welded and fixed with stove skin 8 to be connect, and needs to detect outer tube
4 fixing end and the air-tightness of 8 junction of stove skin, air-tightness well could normal uses；The outer tube 4 is far from stove skin 8
One end for sealed end, be provided with sealing mechanism on sealed end；
Be provided with inlet pipe 51 on the outer tube 4, and inlet pipe 51 is located at the top of outer tube 4, inlet pipe 51 with
Outer tube 4 is connected, and slurries flow into outer tube 4 through inlet pipe 51, fills the gap of mounting hole；The inlet pipe 51 is far from outer
One end of casing 4 is provided with slurry-inlet valve 52, and exhaust branch is provided on the inlet pipe 51 between above-mentioned slurry-inlet valve 52 and outer tube 4
Pipe, and air bleeding valve 53 is provided on exhaust branch pipe；Grout outlet 31 is tubular structure, and grout outlet 31 is by 1 slurry output end edge of fixed component
The length direction for outer tube 4 extends to the outside of outer tube 4, and grout outlet 31 is fixed by sealing mechanism, grout outlet
31 one end far from fixed component 1 are provided with slurry-supplying valve 33, and the slurries of 1 slurry output end of fixed component are flowed into out by grout outlet nozzle 32
Pipe 31 is starched, and is discharged by slurry-supplying valve 33.Since grout outlet nozzle 32 is arranged on 1 slurry output end of fixed component so that slurries are being filled
During mounting hole and outer tube 4, slurries first fill the coated ends that fixed component 1 is contacted with mounting hole, effectively filling installation
Gap between hole and fixed component 1, filling finishes rear slurry just can flow into grout outlet 31 from grout outlet nozzle 32, prevent slurries
Filling process generates air gap.
Vacuum pump with the exit of air bleeding valve 53 is connected, and close slurry-inlet valve 52 and slurry-supplying valve 33, opens air bleeding valve 53
Grouting mechanism is vacuumized by vacuum pump, the gas discharge so as to be in the milk in mechanism is prevented in follow-up filling process
Gas generates air gap；After the completion of vacuumizing, air bleeding valve 53 is closed, opens slurry-inlet valve 52, slurries pour into outer tube 4 by inlet pipe 51
With fill gap in mounting hole, pressure reaches 0.005MPa during grouting.
Gap filling in outer tube 4 and mounting hole is completed, and slurry-supplying valve 33 is opened, in the slurries of 1 slurry output end of fixed component
Grout outlet 31 is flowed into, and discharged by slurry-supplying valve 33 by grout outlet nozzle 32, grout outlet nozzle 32 is disposed in proximity to fixed component 1 and goes out
End is starched, during grout filling gap, slurries can effectively fill the gap of mounting hole.Pulp is provided on the gasket 7 of sealing mechanism
Pipe mounting hole 73, grout outlet 31 pass through grout outlet mounting hole 73, and grout outlet 31 is fixed by grout outlet mounting hole 73, so as to
Realize fixed function of the sealing mechanism to grout outlet 31, it is close to the external progress of grout outlet 31 also by grout outlet mounting hole 73
Envelope prevents slurries from being overflowed from the contact position of grout outlet 31 and gasket 7.
Sealing mechanism includes first flange 61, second flange 62 and gasket 7, the second flange 62 and outer tube 4
Sealed end is fixedly connected with, and gasket 7 is provided between the second flange 62 and first flange 61.First flange 61, second flange
62 and gasket 7 be used for by 4 sealed end of outer tube seal, on the one hand prevent gas leakage during vacuumizing, on the other hand, prevent from starching
Liquid is overflowed from the sealed end of outer tube 4.
Mounting hole is provided on the sealing mechanism, to fixed thermocouple and grout outlet 31.On the gasket 7 of sealing mechanism
The first mounting hole 71, the second mounting hole 72 and grout outlet mounting hole 73 are provided with, the first thermocouple 21, the second thermocouple 22 pass through
First mounting hole 71, the second mounting hole 72 are fixed, and grout outlet 31 is fixed by grout outlet mounting hole 73.First fixes
While the first thermocouple 21, the second thermocouple 22 is fixed in hole 71, the second mounting hole 72, also by 7 and first heat of gasket
Galvanic couple 21, the second thermocouple 22 contact position be sealed, prevent slurries from the first thermocouple 21, the second thermocouple 22 and pad
The contact position of piece 7 overflows.
It is uniformly set on the circumferential edges position of the first flange 61 and the circumferential edges position of second flange 62
There is corresponding screw fixed hole, screw is fixed first flange 61, second flange 62 and gasket 7 by screw fixed hole.The
One flange 61 and second flange 62 are fixed by screw, and pass through first flange 61, second flange 62 and gasket 7 by housing
Pipe 4 is sealed.
Existing blast furnace thermocouple installs equipment, when installing thermocouple post-grouting, slurry at thermocouple temperature sensitive head without
Method effectively fills gap and the exhaust of mounting hole, can not be in direct contact between thermocouple and carbon brick, be also easy to produce vent plug, easily cause thermoelectricity
Even installation is inaccurate, makes a big impact to thermocouple heat conduction, thermometric so that survey of the thermocouple to blast furnace crucibe, bottom temperature
It is big to measure error so that cannot timely monitor cupola well furnace bottom erosion state on-line, it is hidden to bring serious safety to blast fumance
Suffer from.
As shown in figure 5, the installation method of the thermocouple of the present invention, is as follows：
Step 1：Drilling
It is drilled using drilling machine from 8 surface of stove skin, is mounting hole after the completion of drilling；The specific steps of drilling are such as
Under：
A) drilled after blast furnace staying using drilling machine on 8 surface of stove skin, drill bit sequentially pass through stove skin 8, filler 9,
Cooling wall 10 and ramming mass 11, and carbon brick 12 is pierced, it is mounting hole after the completion of drilling；Drilling end position is mounting hole end
End, horizontal distance of the installation bore end apart from 8 surface of stove skin is 565mm, a diameter of 30mm of mounting hole.
B) mounting hole is cleared up using hairbrush.The particulate matter generated in boring procedure is removed.
Step 2：Thermocouple is installed
Thermocouple is fitted into mounting hole, slurries pour into and gap is filled in mounting hole, and installation is completed after grout cures.Peace
Dress thermocouple is as follows：
A it) pre-processes：By the installation of TC in fixed component 1, injected on the carbon brick of installation bore end using injection-tube
Slurries；Detailed step is as follows：
A) thermocouple mounting hole is opened up in fixed component 1 using drilling machine, and passes through thermocouple mounting hole by thermocouple
In fixed component 1；Slurry coating 13 is smeared in the coated ends of the fixed component 1 equipped with thermocouple, slurry coating 13 applies
It is wiped with 1-2cm3Slurries；
B) injection-tube is cleaned using distilled water；5cm is packed into after being completely dried in injection-tube3Slurries, will note
The inlet for penetrating pipe is inserted into mounting hole, until inlet is withstood on the carbon brick 12 of installation bore end, squeezes injection-tube by slurries
The end of mounting hole is injected, during injection slurry, injection-tube first according to a direction is rotated 720 degree, then negative side again
To 720 degree of rotation, the injection rate of slurries is 4cm3, slurries be adhered on carbon brick 12 and smear uniformly.
B it) installs：Thermocouple is fitted into fixed component 1 in mounting hole, is then poured into slurries in mounting hole between filling
Gap；Detailed step is as follows：
A) it is fixed
The fixing end of outer tube 4 is mounted on 8 surface of stove skin, the outer tube 4 is mounted on by being welded and fixed in stove
8 surface of skin, the first thermocouple 21, the second thermocouple 22 and fixed component 1 are fitted into from outer tube 4 in mounting hole, fixed component 1
Coated ends end withstands on the carbon brick 12 of installation bore end, then the sealing mechanism of 4 sealed end of outer tube is fixed sealing, and
Detect sealing mechanism, outer tube 4 and the air-tightness on 8 surface of stove skin；After installation is complete, 21 thermometric end end face of the first thermocouple and stove
The horizontal distance on 8 surface of skin is 465mm, and horizontal distance of second thermocouple 22 apart from 8 surface of stove skin is 565mm；First thermoelectricity
The horizontal distance of even 21 thermometric end end faces and 22 thermometric end end face of the second thermocouple is 100mm.
B) it vacuumizes
Vacuum pump with the exit of air bleeding valve 53 is connected, and close slurry-inlet valve 52 and slurry-supplying valve 33, opens air bleeding valve 53
It is vacuumized by vacuum pump；During vacuumizing, the gas in mechanism of being in the milk, 13 He of slurry coating of fixed component 1
The gas being previously implanted in slurries can be precipitated during vacuumizing, so as to prevent air gap.
C) it is in the milk
After vacuumizing completion, air bleeding valve 53 is closed, opening slurry-inlet valve 52, which pours into slurries in outer tube 4 and mounting hole, to be filled out
Gap is filled, when pressure reaches 0.005MPa when grouting, opens slurry-supplying valve 33, until grout outlet 31 has slurries outflow；
D) it is compacted
Slurry-supplying valve 33 is closed, increase grouting pressure reaches 0.05MPa, keeps 5min；
After furnace compound wind, after being filled in the grout cures in gap, that is, installation is completed.
The present invention is set to the one end of grout outlet 31 far from sealing mechanism due to grout outlet nozzle 32 so that slurries are in slurries
During filling gap, only slurries are full of entire gap, and slurries just can flow into grout outlet 31 from grout outlet nozzle 32, effectively
The gap of mounting hole is filled, prevents slurries filling process from generating air gap；Slurry coating 13 is provided in 1 coated ends of fixed component,
When slurry coating 13 is so that the coated ends of fixed component 1 come into full contact with installation bore end, mounting hole end can be effectively discharged out
The gas at end, and by gap effectively, be sufficient filling with, so as to effectively eliminate slurries filling process generation air gap so that peace
It is in direct contact between thermocouple and carbon brick after dress, improves the accuracy of thermometric so that the temperature for installing thermocouple measurement is true
Reflect the temperature of cupola well carbon brick.
In addition, the installation method of the thermocouple of the present invention, when being pre-processed to fixed component 1, equipped with thermocouple
Fixed component 1 coated ends smear slurry coating 13, and using injection-tube installation bore end carbon brick 12 on, be previously implanted
Slurries when fixed component 1 is contacted with installation bore end, prevent air gap so that slurries are sufficient filling with, so as to effectively disappear
The air gap generated in addition to slurries filling process so that the temperature actual response of thermocouple measurement goes out the temperature of cupola well carbon brick.
With reference to Fig. 7, blast furnace thermocouple is replaced during execute-in-place：The online mounting process of blast furnace thermocouple, it is specific to walk
It is rapid as follows：
Step 1：Digitalisation is drilled using drilling machine from 8 surface of stove skin, when drilling to carbon brick 12, measures temperature
Degree, and temperature is recorded as t, it is mounting hole after the completion of drilling；Detailed step is as follows：
A) drilled after blast furnace staying using drilling machine on 8 surface of stove skin, drill bit sequentially pass through stove skin 8, filler 9,
Cooling wall 10 and ramming mass 11, and carbon brick 12 is pierced, it is mounting hole after the completion of drilling；
B) drilling to 12 middle part of carbon brick is the first temperature measuring point, and the first temperature measuring point and the horizontal distance on 8 surface of stove skin are
465mm, it is t to measure 12 temperature of the first temperature measuring point carbon brick1, at the end of drilling, as the end of mounting hole, the end of mounting hole are
The horizontal distance on the second temperature measuring point, the second temperature measuring point and 8 surface of stove skin is 565mm, measures 12 temperature of the second temperature measuring point carbon brick and is
t2；By temperature t1And t2Record is as shown in table 1, and mounting hole is cleared up using hairbrush.
Step 2：Thermocouple is installed
Thermocouple is fitted into mounting hole, slurries pour into and gap is filled in mounting hole, and installation is completed after grout cures.Peace
Dress thermocouple is as follows：
A it) pre-processes：By the installation of TC in fixed component 1, injected on the carbon brick of installation bore end using injection-tube
Slurries；Detailed step is as follows：
A) thermocouple mounting hole is opened up in fixed component 1 using drilling machine, and passes through thermocouple mounting hole by thermocouple
In fixed component 1；Slurry coating 13 is smeared in the coated ends of the fixed component 1 equipped with thermocouple, slurry coating 13 applies
It is wiped with 1-2cm3Slurries；
B) injection-tube is cleaned using distilled water；5cm is packed into after being completely dried in injection-tube3Slurries, will note
The inlet for penetrating pipe is inserted into mounting hole, until inlet is withstood on the carbon brick 12 of installation bore end, squeezes injection-tube by slurries
The end of mounting hole is injected, during injection slurry, injection-tube first according to a direction is rotated 720 degree, then negative side again
To 720 degree of rotation, the injection rate of slurries is 4cm3, slurries be adhered on carbon brick 12 and smear uniformly.
B it) installs：Thermocouple is fitted into fixed component 1 in mounting hole, is then poured into slurries in mounting hole between filling
Gap；Detailed step is as follows：
A) it is fixed
The fixing end of outer tube 4 is mounted on 8 surface of stove skin, the outer tube 4 is mounted on by being welded and fixed in stove
8 surface of skin, the first thermocouple 21, the second thermocouple 22 and fixed component 1 are fitted into from outer tube 4 in mounting hole, fixed component 1
Coated ends end withstands on the carbon brick 12 of installation bore end, then the sealing mechanism of 4 sealed end of outer tube is fixed sealing, and
Detect sealing mechanism, outer tube 4 and the air-tightness on 8 surface of stove skin；After installation is complete, 21 thermometric end end face of the first thermocouple and stove
The horizontal distance on 8 surface of skin is 465mm, and horizontal distance of second thermocouple 22 apart from 8 surface of stove skin is 565mm；First thermoelectricity
The horizontal distance of even 21 thermometric end end faces and 22 thermometric end end face of the second thermocouple is 100mm.
B) it vacuumizes
Vacuum pump with the exit of air bleeding valve 53 is connected, and close slurry-inlet valve 52 and slurry-supplying valve 33, opens air bleeding valve 53
It is vacuumized by vacuum pump；During vacuumizing, the gas in mechanism of being in the milk, 13 He of slurry coating of fixed component 1
The gas being previously implanted in slurries can be precipitated during vacuumizing, so as to prevent air gap.
C) it is in the milk
After vacuumizing completion, air bleeding valve 53 is closed, opening slurry-inlet valve 52, which pours into slurries in outer tube 4 and mounting hole, to be filled out
Gap is filled, when pressure reaches 0.005MPa when grouting, opens slurry-supplying valve 33, until grout outlet 31 has slurries outflow；
D) it is compacted
Slurry-supplying valve 33 is closed, increase grouting pressure reaches 0.05MPa, keeps 5min；
Step 3：Accuracy detects,
A after) being filled in the grout cures in gap, the registration of the thermocouple after installation is read, wherein the first thermocouple 21
Measurement temperature is t1ˊ, it is t that the second thermocouple 22, which measures temperature,2ˊ；
B) as | (t1-t1ˊ)/t |≤5%, | (t2-t2ˊ)/t |≤5%, and | 1- (t2ˊ-t1ˊ)/(t2-t1) |≤10%, i.e.,
It determines that the installation of TC is accurate, meets using standard；Otherwise, then it reinstalls, and repeats step 1 to step 3.
Comparative example 1
The substance of this comparative example with embodiment 1, the difference is that：The online mounting process of blast furnace thermocouple
Step 2：Using innovation and creation：Blast furnace is carried out for the thermocouple (patent No. ZL201220006445.7) that blast furnace is installed online
The installation of TC, after installation is complete, the horizontal distance on 8 surface of recording distance stove skin is the first temperature measuring point thermocouple of 465mm
Temperature is t ˊ1, the temperature of the second temperature measuring point thermocouple that the horizontal distance on 8 surface of recording distance stove skin is 565mm is t ˊ2, note
Record is as shown in table 1.
Table 1 installs the thermometric numerical value of thermocouple
| Insertion depth | Measure temperature | Embodiment 1 | Comparative example 1 |
| First temperature measuring point (465mm) | 174 | 177 | 157 |
| Second temperature measuring point (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%, using the installation of TC method of embodiment 1, the installation of TC is accurate
Really, meet using standard.And comparative example 1 | (t1-t1ˊ)/t |=9.7% ＞ 5%, | (t2-t2ˊ)/t |=14.3% ＞ 5%,
And | 1- (t2ˊ-t1ˊ)/(t2-t1) |=23.8% ＞ 10%, using the installation of TC method of comparative example 1, the installation of TC is not
Accurately, it does not meet using standard.It then reinstalls, and repeats step 1 to step 3.
|(t1-t1ˊ)/t |=9.7% ＞ 5%, | (t2-t2ˊ)/t |=14.3% ＞ 5%, and | 1- (t2ˊ-t1ˊ)/(t2-
t1) |=13.8% ＞ 10%, the thermocouple error that comparative example 1 is installed is larger, and reason is：Thermocouple equipment installs thermoelectricity
During even post-grouting, slurry can not effectively fill gap and the exhaust of trepanning, nothing between thermocouple and carbon brick at thermocouple temperature sensitive head
Method is in direct contact, and is also easy to produce vent plug, causes heat transfer not smooth；So as to cause the thermocouple after installation, temperature measurement error is larger, thus surveys
The temperature of amount also can not actual response go out the temperature of cupola well, furnace bottom carbon brick.
The present embodiment is effectively prevented generation air gap during blast furnace installs thermocouple so that and slurries are sufficient filling with, from
And effectively eliminate the air gap of slurries filling process generation so that the temperature actual response of thermocouple measurement goes out cupola well carbon brick
Temperature.
In addition, existing blast furnace thermocouple mounting process, it is difficult to effective to judge whether meet mark after the installation of TC
Standard, error is larger after often resulting in the installation of TC, and staff but also do not know that there are errors；The blast furnace heat of the present invention
The online mounting process of galvanic couple, creative proposition by comparing the front and rear temperature difference of temperature measuring point, two temperature measuring point temperature difference differences,
So as to judge whether the installation of TC meets working condition requirement, the qualified installation of blast furnace thermocouple is ensure that, so as to accurately and effectively
Monitor blast furnace crucibe, furnace bottom carbon brick temperature.
Embodiment 2
The substance of the present embodiment with embodiment 1, the difference is that：In compacting process, slurry-supplying valve 33 is closed, is increased
Big grouting pressure reaches 0.08MPa, keeps 20min；Matched internal and external threads are provided on outer tube 4 and inlet pipe 51, outside
Casing 4 is connected through a screw thread with inlet pipe 51, and detects the air-tightness of outer tube 4 and inlet pipe 51.
First thermocouple, 21 thermometric end end face and the horizontal distance on 8 surface of stove skin are 515mm, and the second thermocouple 22 is apart from stove
The horizontal distance on 8 surface of skin is 565mm；The level of first thermocouple, 21 thermometric end end face and 22 thermometric end end face of the second thermocouple
Distance is 50mm.First temperature measuring point and the horizontal distance on 8 surface of stove skin are 515mm, and the first temperature measuring point is surveyed with the first thermocouple 21
Warm end end face is located at same vertical position, and the horizontal distance on the second temperature measuring point and 8 surface of stove skin is 565mm, the second temperature measuring point with
Second thermocouple, 22 thermometric end end face is located at same vertical position.In installation process, it is as shown in table 2 to measure t and t ˊ records.
Table 2 installs the thermometric numerical value of thermocouple
| Insertion depth | Measure temperature | Embodiment 1 |
| First temperature measuring point (515mm) | 215 | 209 |
| Second temperature measuring point (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%, using the installation of TC method of embodiment 2, the installation of TC is accurate
Really, meet using standard.
Embodiment 3
The substance of the present embodiment with embodiment 1, the difference is that：In compacting process, slurry-supplying valve 33 is closed, is increased
Big grouting pressure reaches 0.1MPa, keeps 15min.First thermocouple, 21 thermometric end end face and the horizontal distance on 8 surface of stove skin are
415mm, horizontal distance of second thermocouple 22 apart from 8 surface of stove skin are 565mm；First thermocouple, 21 thermometric end end face and second
The horizontal distance of 22 thermometric end end face of thermocouple is 150mm.In installation process, the first temperature measuring point and 8 surface of stove skin it is horizontal away from
It is located at same vertical position, the second temperature measuring point and stove skin from for 415mm, the first temperature measuring point and 21 thermometric end end face of the first thermocouple
The horizontal distance on 8 surfaces is 565mm, and the second temperature measuring point and 22 thermometric end end face of the second thermocouple are located at same vertical position.Peace
During dress, it is as shown in table 3 to measure t and t ˊ records.
Table 3 installs the thermometric numerical value of thermocouple
| Insertion depth | Measure temperature | Embodiment 1 |
| First temperature measuring point (415mm) | 116 | 112 |
| Second temperature measuring point (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%, using the installation of TC method of embodiment 3, the installation of TC is accurate
Really, meet using standard.
Embodiment 4
The substance of the present embodiment with embodiment 1, the difference is that：As shown in fig. 6, it is opened up in fixed component 1
There are 3 thermocouple mounting holes, the thermometric end of the first thermocouple 21, the second thermocouple 22 and third thermocouple is consolidated mounted on thermocouple
Determine in hole, and the first mounting hole 71, the second mounting hole 72, grout outlet mounting hole 73 and third mounting hole 74 are offered on gasket 7；
First thermocouple 21, the second thermocouple 22 and third thermocouple pass through the first mounting hole 71, the second mounting hole 72 and third respectively
Mounting hole 74 is fixed.
First thermocouple, 21 thermometric end end face and the horizontal distance on 8 surface of stove skin are 415mm, and the second thermocouple 22 is apart from stove
The horizontal distance on 8 surface of skin is 515mm, and horizontal distance of the third thermocouple apart from 8 surface of stove skin is 565mm；First thermocouple
The horizontal distance of 21 thermometric end end faces and 22 thermometric end end face of third thermocouple is 150mm.In installation process, the first temperature measuring point with
The horizontal distance on 8 surface of stove skin is 415mm, and the first temperature measuring point and 21 thermometric end end face of the first thermocouple are located at same vertical position
It puts, the horizontal distance on the second temperature measuring point and 8 surface of stove skin is 515mm, 22 thermometric end end face of the second temperature measuring point and the second thermocouple
Positioned at same vertical position；The horizontal distance on third temperature measuring point and 8 surface of stove skin is 565mm, third temperature measuring point and third thermoelectricity
Even thermometric end end face is located at same vertical position.In installation process, it is as shown in table 4 to measure t and t ˊ records.
Table 4 installs the thermometric numerical value of thermocouple
| Insertion depth | Measure temperature | Embodiment 1 |
| First temperature measuring point (415mm) | 117 | 112 |
| Second temperature measuring point (515mm) | 214 | 213 |
| Third temperature measuring point (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-t1ˊ)/t1 |=4.3% ＜ 5%, | (t2-t2ˊ)/t2 |=0.4% ＜
5%, | (t3-t3ˊ)/t2 |=1.1% ＜ 5%, and | 1- (t3ˊ-t1ˊ)/(t3-t1) |=5.2% ＜ 10%, | 1- (t3ˊ-t2ˊ)/
(t3-t2) |=6.9% ＜ 10%, using the installation of TC method of embodiment 4, the installation of TC is accurate, meets using standard.
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in attached drawing
What is shown is also one of embodiments of the present invention, and practical structure is not limited thereto.So if common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (9)
1. a kind of online mounting process of blast furnace thermocouple, it is characterised in that：
Step 1：Digitalisation is drilled using drilling machine from stove skin (8) surface, when drilling to carbon brick (12), measures temperature
Degree, and temperature is recorded as t, it is mounting hole after the completion of drilling；It is the first temperature measuring point in the middle part of drilling to carbon brick (12), measures first
Temperature measuring point carbon brick (12) temperature is t1, at the end of drilling, the as end of mounting hole, the end of mounting hole is the second temperature measuring point,
Second temperature measuring point carbon brick (12) temperature is measured as t2；And mounting hole is cleared up using hairbrush；
Step 2：Thermocouple is installed, thermocouple is fitted into mounting hole using thermocouple online erecting device, slurries pour into installation
Gap is filled in hole；The online erecting device of above-mentioned thermocouple includes grouting mechanism, sealing mechanism and fixed component (1), is filling
Slurry flow port is provided on pulp grinder structure, which discharges extra slurries after filling gap for slurries, fills
Pulp grinder structure includes inlet pipe (51) and grout outlet (31), and grout outlet nozzle (32) is slurry flow port, and grout outlet nozzle (32) is set
It is placed in the one end of grout outlet (31) far from sealing mechanism；Slurry coating (13) is provided in the coated ends of fixed component (1)；
Step 3：Accuracy detects,
A after) being filled in the grout cures in gap, the registration of the thermocouple after installation is read, wherein the first thermocouple (21) is surveyed
Amount temperature is t1ˊ, it is t that the second thermocouple (22), which measures temperature,2ˊ；
B) as | (t1-t1ˊ)/t |≤5%, | (t2-t2ˊ)/t |≤5%, and | 1- (t2ˊ-t1ˊ)/(t2-t1) |≤10%, that is, it determines
The installation of TC is accurate, meets using standard；Otherwise, then it reinstalls, and repeats step 1 to step 3；
When drilling is to carbon brick (12), temperature is measured, and records temperature as t.
2. a kind of online mounting process of blast furnace thermocouple according to claim 1, it is characterised in that：The step
Rapid one：Drilling is as follows：
Drilled after blast furnace staying using drilling machine on stove skin (8) surface, drill bit sequentially pass through stove skin (8), filler (9),
Cooling wall (10) and ramming mass (11), and carbon brick (12) is pierced, it is mounting hole after the completion of drilling.
3. a kind of online mounting process of blast furnace thermocouple according to claim 1 or 2, it is characterised in that：
The step two：Installation thermocouple is as follows：
A it) pre-processes：By the installation of TC in fixed component (1), injected and starched on the carbon brick of installation bore end using injection-tube
Liquid；
B it) installs：Thermocouple is fitted into fixed component (1) in mounting hole, then slurries is poured into, gap is filled in mounting hole.
4. a kind of online mounting process of blast furnace thermocouple according to claim 3, it is characterised in that：
The step two：Installation thermocouple in A) pretreatment be as follows：
A) thermocouple mounting hole is opened up in fixed component (1) using drilling machine, and passes through thermocouple mounting hole and pacify thermocouple
In fixed component (1)；Slurry coating (13) is smeared in the coated ends of the fixed component (1) equipped with thermocouple；
B) injection-tube is cleaned using distilled water；Slurries are packed into after being completely dried in injection-tube, by the injection of injection-tube
Mouth is inserted into mounting hole, until inlet is withstood on the carbon brick (12) of installation bore end, is squeezed injection-tube and is installed slurries injection
The end in hole is adhered on carbon brick (12), and is smeared uniform.
5. a kind of online mounting process of blast furnace thermocouple according to claim 4, it is characterised in that：
The step two：Installation thermocouple in B) installation be as follows：
A) it is fixed
The fixing end of outer tube (4) is mounted on stove skin (8) surface, the first thermocouple (21), the second thermocouple (22) and fixation
Component (1) is fitted into from outer tube (4) in mounting hole, and fixed component (1) end is withstood on the carbon brick (12) of installation bore end, then will
Sealing is fixed in the sealing mechanism of outer tube (4) sealed end；
B) it vacuumizes
Vacuum pump with the exit of air bleeding valve (53) is connected, and close slurry-inlet valve (52) and slurry-supplying valve (33), opens air bleeding valve
(53) it is vacuumized by vacuum pump；
C) it is in the milk
After vacuumizing completion, air bleeding valve (53) is closed, slurry-inlet valve (52) is opened and pours into slurries in outer tube (4) and mounting hole
Gap is filled, then opens slurry-supplying valve (33), until grout outlet (31) has slurries outflow；
D) it is compacted
Slurry-supplying valve (33) is closed, increase grouting pressure reaches 0.05-0.1MPa, keeps 5-20min.
6. a kind of online mounting process of blast furnace thermocouple according to claim 5, it is characterised in that：First thermoelectricity
Even (21) head end is with the second thermocouple (22) head end not on same perpendicular.
7. a kind of online mounting process of blast furnace thermocouple according to claim 5, it is characterised in that：First thermoelectricity
Even (21) head end, the horizontal distance of the second thermocouple (22) head end and the level of the first temperature measuring point, the second temperature measuring point
Apart from identical.
8. according to a kind of online mounting process of blast furnace thermocouple of claim 5-7 any one of them, it is characterised in that：
The center line of the outer tube (4) and the center line of mounting hole are on same straight line.
9. a kind of online mounting process of blast furnace thermocouple according to claim 8, it is characterised in that：Outer tube
(4) with being provided with matched internal and external threads on inlet pipe (51), outer tube (4) is connected through a screw thread with inlet pipe (51).
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| CN110527769B (en) * | 2018-07-18 | 2021-04-30 | 广东韶钢松山股份有限公司 | Method for judging residual thickness of carbon brick in blast furnace hearth |
| CN111187870B (en) * | 2020-02-27 | 2021-12-07 | 北京首钢股份有限公司 | Method for mounting furnace hearth side wall thermocouple for blast furnace engineering |
| 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 |
| CN115283625B (en) * | 2022-10-10 | 2022-12-13 | 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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| CN201220947Y (en) * | 2008-07-22 | 2009-04-15 | 内蒙古科技大学 | On-line detecting method for temperature of blast furnace chamber |
| CN102433409A (en) * | 2011-12-08 | 2012-05-02 | 南通宝钢钢铁有限公司 | Embedding and thickness measuring method for thermocouple on erosion part of blast furnace crucible |
| CN202482340U (en) * | 2012-01-09 | 2012-10-10 | 宝山钢铁股份有限公司 | Thermocouple for online installation of blast furnace |
| CN202954056U (en) * | 2012-10-19 | 2013-05-29 | 宝山钢铁股份有限公司 | Blast furnace body brick lining temperature measuring device |
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