CN105624354A - Mounting method of blast furnace hearth bottom temperature thermocouple - Google Patents
Mounting method of blast furnace hearth bottom temperature thermocouple Download PDFInfo
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- CN105624354A CN105624354A CN201610214542.8A CN201610214542A CN105624354A CN 105624354 A CN105624354 A CN 105624354A CN 201610214542 A CN201610214542 A CN 201610214542A CN 105624354 A CN105624354 A CN 105624354A
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- thermopair
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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 mounting method of a blast furnace hearth bottom temperature thermocouple, belonging to the field of blast furnace temperature detection in metallurgical industry. The method comprises the following steps: 1. drilling: drilling from a furnace casing surface by a drill, thereby obtaining a mounting hole; 2. mounting of thermocouple: putting the thermocouple into the mounting hole, filling the gap in the mounting hole by using a slurry, and finishing the mounting after the slurry solidifies. In the fixed part pretreatment process, a slurry coating is applied to the coating end of the fixed part provided with the thermocouple, and the slurry is previously injected into the carbon brick at the tail end of the mounting hole by using an injection tube; when the fixed part contacts the tail end of the mounting hole, the air gap is avoided, so that the slurry sufficiently fills the mounting hole, thereby effectively eliminating the air gap generated in the slurry filling process; and thus, the temperature measured by the thermocouple truly reflects the temperature of the carbon brick.
Description
Technical field
The present invention relates to blast furnace temperature detection field in metallurgy industry, more specifically, it relates to the installation method of a kind of blast furnace hearth and bottom temperature thermocouple.
Background technology
Blast furnace is the important component part of Steel Complex, and blast-furnace technique economic target is good, and technique is simple, and turnout is big, labour productivity height, and energy consumption is low, and its pig iron produced accounts for more than the 95% of world's iron ultimate production. Nowadays, prolonging campaign is the target that modern blast furnace is pursued, and prolonging campaign just means the raising of economic benefit. Wherein, blast furnace hearth, furnace bottom are blast fumance safety and the long-lived most important thing, and from current statistics, domestic and international blast furnace hearth burns the corner mostly occurring in sidewall or sidewall and furnace bottom, and what be commonly called as at once resembles pin attack sites.
At present, blast furnace hearth, furnace bottom state are mainly calculated by thermopair detected temperatures and judge that cupola well is residual thick. 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 the necessary condition of mathematical model. Blast furnace is when newly-built, furnace bottom and bosh gas index all bury the thermopair of some amount underground, but along with the severe environment of the passing produced and cupola well itself, the installation position of the thermopair originally buried in advance there occurs deviation, the temperature of detection lacks verity and validity, cupola well galvanic couple lost efficacy and undoubtedly the supervision of cupola well state was brought a lot of blind area, brought hidden danger to brick lining in blast furnace chamber erosion monitoring and production safety.
And, owing to cannot directly thermopair be inserted in carbon brick, usually on carbon brick, thermopair is installed in boring, but adopt existing technology to hole on blast furnace and thermopair is installed, easily cause the installation of TC inaccurate, to thermopair heat conduction, survey temperature and make a big impact so that thermopair is big to the measuring error of blast furnace hearth, 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: thermopair (China Patent No.: the ZL201220006445.7 fixed online for blast furnace, the applying date: 2012-01-09) and the thermopair (China Patent No.: ZL201420711679.0, the applying date: 2014-11-24) installed online of a kind of blast furnace hearth[1-2]Although, improve the installation method of blast furnace thermocouple and device be installed, but after installing, the error of thermopair is bigger, it is difficult to reach the requirement of rig-site utilization.
Reference:
[1] Baoshan Iron & Steel Co., Ltd. the thermopair for blast furnace is installed online: China, ZL201220006445.7 [P] .2012-10-10.
[2] Shanghai Bao Ying industrial furnace Engineering Co., Ltd. the thermopair that a kind of blast furnace hearth is installed online: China, ZL201420711679.0 [P] .2015-03-25.
Summary of the invention
1. invent the technical problem to be solved
The object of the present invention be exactly solve blast furnace in prior art change after the measuring error of thermopair big, make thermopair cannot go out the temperature of carbon brick by actual response, the installation method of a kind of blast furnace hearth and bottom temperature thermocouple is provided, thus reduce the measuring error of thermopair, it is achieved the on-line monitoring of cupola well furnace bottom erosion state.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
The installation method of a kind of blast furnace hearth and bottom temperature thermocouple of the present invention,
Step one: boring, adopts drilling machine to hole from stove epidermis face, is open holes after having holed; Step 2: installing thermopair, loaded by thermopair in open holes, slurries pour into fills gap in open holes, namely slurries complete to install after solidifying.
Further, described step one: the concrete steps of boring are as follows:
A) adopting drilling machine to hole in stove epidermis face after blast furnace staying, drill bit is successively through stove skin, filler, cooling stave and ramming mass, and bores into carbon brick, is open holes after having holed;
B) hairbrush is adopted to be cleared up by open holes.
Further, described step 2: the concrete steps installing thermopair are as follows:
A) pre-treatment: by the installation of TC at fixing part, utilizes syringe to inject slurries on the carbon brick of open holes end;
B) install: thermopair is loaded in open holes with fixing part, then slurries is poured into and open holes is filled gap.
Further, described step 2: install A in thermopair) pretreated concrete steps are as follows:
A) utilize drilling machine to offer thermopair fixed orifices on fixing part, and by thermopair fixed orifices by the installation of TC on fixing part; Coated ends at the fixing part that thermopair is housed smears slurry coating;
B) distilled water is adopted to be cleaned by syringe; Loading slurries in syringe after completely dry, by the inlet of syringe insertion open holes, until inlet withstands on the carbon brick of open holes end, slurries are injected the end of open holes by extruding syringe, stick on carbon brick, and smear evenly.
Further, described step 2: install B in thermopair) concrete steps installed are as follows:
A) fixing
The inboardend of outer tube is arranged on stove epidermis face, and the first thermopair, the 2nd thermopair and fixing part load open holes from outer tube, and fixing part end withstands on the carbon brick of open holes end, then the sealing mechanism of outer tube sealed end is fixed sealing;
B) vacuumize
Vacuum pump is connected with the exit of vent valve, and closes slurry-inlet valve and slurry-supplying valve is opened vent valve and vacuumized by vacuum pump;
C) it is in the milk
After having vacuumized, close vent valve, open slurry-inlet valve and slurries are poured in outer tube and open holes fill gap, then open slurry-supplying valve, until outlet pipe has slurries to flow out;
D) compacting
Close slurry-supplying valve, increase grouting pressure and reach 0.05-0.1MPa, keep 5-20min;
After furnace compound wind, after the slurries being filled in gap solidify, namely complete to install.
Further, the medullary ray of described outer tube and the medullary ray of open holes are on same bar straight line.
Further, fixing part is cylindrical carbon-point, and the circumferential edges place of cylindrical carbon-point has offered thermopair fixed orifices.
Further, the first thermocouple temperature measurement end end face and the 2nd thermocouple temperature measurement end end face be not on same perpendicular.
Further, outer tube with inlet pipe is provided with the internal and external threads matched, outer tube and inlet pipe are threaded connection.
Further, sealing mechanism comprises the first flange, the 2nd flange and pad, and the 2nd described flange is connected mutually with the sealed end of outer tube, is provided with pad between the 2nd described flange and the first flange.
3. useful effect
Adopt technical scheme provided by the invention, compared with existing known technology, there is following useful effect:
(1) the outlet pipe mouth of pipe of the present invention is arranged at outlet pipe one end away from sealing mechanism, slurries are made to fill in the process in gap at slurries, only slurries are full of whole gap, slurries just can flow into outlet pipe from the outlet pipe mouth of pipe, effectively fill the gap of open holes, prevent slurries filling process from producing air gap;
(2) the fixing part coated ends of the present invention is provided with slurry coating, when slurry coating makes the coated ends of fixing part fully contact with open holes end, can effectively discharge the gas of open holes end, and gap effectively, is fully filled, thus effectively eliminating the air gap that slurries filling process produces so that the thermopair after installation directly contacts with between carbon brick.
(3) the survey Wen Duan of thermopair is fixed by fixing part, and fixing part has been offered thermopair fixed orifices, the survey Wen Duan of the first thermopair and the 2nd thermopair is arranged in thermopair fixed orifices, thus prevent the process deviation pre-installed position that thermopair is being installed, one end of fixing part contacts with open holes end, ensures the accuracy of position of thermocouple.
(4) in the process that the present invention vacuumizes, the gas in grouting mechanism, the slurry coating of fixing part and inject the gas of slurries in advance, can precipitation in the process vacuumized, thus prevent air gap, thus improve the measuring accuracy of the installation of TC;
(5) in the installation method of thermopair of the present invention, when fixing part is carried out pre-treatment, coated ends at the fixing part that thermopair is housed smears slurry coating, and adopt syringe on the carbon brick of open holes end, inject slurries in advance, when fixing part contacts with open holes end, prevent air gap, slurries are fully filled, thus effectively eliminates the air gap that slurries 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, creative propose by contrast survey temperature point the front and back temperature difference, two survey temperature point temperature difference differences, thus judge the installation of TC whether conformance with standard, ensure 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;
The a kind of of Fig. 4 the present invention surveys, for blast furnace, the one-piece construction schematic diagram that device installed online by warm thermopair;
The installation of TC method flow diagram of Fig. 5 the 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 the present invention.
Label in schematic diagram illustrates:
1, fixing part; 21, the first thermopair; 22, the 2nd thermopair; 31, outlet pipe; 32, the outlet pipe mouth of pipe; 33, slurry-supplying valve; 4, outer tube; 51, inlet pipe; 52, slurry-inlet valve; 53, vent valve; 61, the first flange; 62, the 2nd flange; 7, pad; 71, the first fixed orifices; 72, the 2nd fixed orifices; 73, outlet pipe fixed orifices; 74, the 3rd fixed orifices; 8, stove skin; 9, filler; 10, cooling stave; 11, ramming mass; 12, carbon brick; 13, slurry coating.
Embodiment
Below in conjunction with embodiment and Figure of description, the present invention is described in detail.
Embodiment 1
Composition graphs 1,2,3,4,5 and 7, device installed online by a kind of thermopair for blast furnace survey temperature of the present invention, comprise grouting mechanism and sealing mechanism, grouting mechanism is provided with slurry stream outlet, the outlet of this slurry stream is used for discharging unnecessary slurries after slurries fill gap, and described slurry stream outlet is positioned at the one end away from sealing mechanism; Owing to slurry stream outlet is positioned at the one end away from sealing mechanism, make slurries in the process filling gap, the gas of open holes can be got rid of completely, only slurries are full of whole gap, slurries just can export from slurry stream, prevent slurries filling process from producing air gap, thus improve the tolerance range of thermopair.
Grouting mechanism comprises inlet pipe 51 and outlet pipe 31, and outlet pipe 31 is provided with the outlet pipe mouth of pipe 32, and the outlet pipe mouth of pipe 32 is slurry stream outlet, and the outlet pipe mouth of pipe 32 is arranged at outlet pipe 31 one end away from sealing mechanism. Inlet pipe 51 fills, for slurries are introduced grouting mechanism, the gap that device installed online by thermopair, after slurries fill gap, slurries flow into outlet pipe 31 by the outlet pipe mouth of pipe 32, outlet pipe 31 is for discharging unnecessary slurries, owing to the outlet pipe mouth of pipe 32 is arranged at outlet pipe 31 one end away from sealing mechanism, slurries are made to fill in the process in gap at slurries, only slurries are full of whole gap, slurries just can flow into outlet pipe 31 from the outlet pipe mouth of pipe 32, effectively fill the gap of open holes, prevent slurries filling process from producing air gap.
The present invention comprises fixing part 1, and the survey Wen Duan of thermopair is fixed by fixing part 1, and one end of fixing part 1 contacts with open holes end, wherein: described open holes is for the open holes at stove skin 8 surface mounting thermopair; Open holes is holed on stove skin 8 surface by drilling machine, drill bit is successively through stove skin 8, filler 9, cooling stave 10 and ramming mass 11, and bore into carbon brick 12, open holes it is after having holed, boring terminates position and is open holes end, above-mentioned open holes can be drilling 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 part 1 is cylindrical carbon-point, and the diameter of the diameter < open holes of carbon-point, the circumferential edges place of cylindrical carbon-point has offered thermopair fixed orifices.
The survey Wen Duan of thermopair is fixed by fixing part 1, and has offered 2 thermopair fixed orificess on fixing part 1, and the survey Wen Duan of the first thermopair 21 and the 2nd thermopair 22 is arranged in thermopair fixed orifices. Thus preventing the process deviation pre-installed position that thermopair is being installed, one end of fixing part 1 contacts with open holes end, ensures the accuracy of position of thermocouple. Temperature end end face surveyed by first thermopair 21 and the 2nd thermopair 22 surveys temperature end end face not on same perpendicular. The horizontal throw that temperature end end face and the 2nd thermopair 22 survey warm end end face surveyed by first thermopair 21 is 100mm.
Fixing part 1 two ends are respectively arranged with coated ends and slurry output end, the coated ends of fixing part 1 and open holes joining distal ends place, coated ends is provided with slurry coating 13, fixing part 1 is slurry output end away from coated ends, slurry output end is provided with outlet pipe 31, and outlet pipe 31 is provided with the outlet pipe mouth of pipe 32 near the position of fixing part 1 slurry output end. The coated ends of fixing part 1 is coated with slurry coating 13, when slurry coating 13 makes the coated ends of fixing part 1 fully contact with open holes end, it is possible to effectively discharges the gas of open holes end, and effectively, is fully filled in gap; Owing to the outlet pipe mouth of pipe 32 of outlet pipe 31 is arranged near fixing part 1 slurry output end, during grout filling gap, only slurries are full of the gap of open holes, and slurries just can flow into outlet pipe 31 from the outlet pipe mouth of pipe 32, effectively fill the gap of open holes.
The present invention comprises grouting mechanism and sealing mechanism, and grouting mechanism comprises inlet pipe 51, outlet pipe 31, outer tube 4, slurry-inlet valve 52 and vent valve 53; Described outer tube 4 is horizontally disposed open tube, the described medullary ray of outer tube 4 and the medullary ray of open holes are on same bar straight line, the two ends of outer tube 4 are respectively arranged with inboardend and sealed end, wherein the inboardend of outer tube 4 is connected with stove skin 8 phase, the inboardend of outer tube 4 adopts to be welded and fixed with stove skin 8 and is connected, and needing the resistance to air loss of inboardend and stove skin 8 junction detecting outer tube 4, resistance to air loss well could normal use; Described outer tube 4 is sealed end away from one end of stove skin 8, and sealed end is provided with sealing mechanism;
Being provided with inlet pipe 51 on described outer tube 4, and inlet pipe 51 is positioned at the top of outer tube 4, inlet pipe 51 is connected with outer tube 4, and slurries flow into outer tube 4 through inlet pipe 51, fills the gap of open holes; Described inlet pipe 51 is provided with slurry-inlet valve 52 away from one end of outer tube 4, the inlet pipe 51 between above-mentioned slurry-inlet valve 52 and outer tube 4 is provided with exhaust branch pipe, and is provided with vent valve 53 on exhaust branch pipe; Outlet pipe 31 is tubular structure, outlet pipe 31 is extended to the outside of outer tube 4 by fixing part 1 slurry output end along the length direction of outer tube 4, and outlet pipe 31 fixed by sealing mechanism, outlet pipe 31 is provided with slurry-supplying valve 33 away from one end of fixing part 1, the slurries of fixing part 1 slurry output end flow into outlet pipe 31 by the outlet pipe mouth of pipe 32, and discharge by slurry-supplying valve 33. Owing to the outlet pipe mouth of pipe 32 is arranged on fixing part 1 slurry output end, make slurries in the process filling open holes and outer tube 4, slurries first fill the coated ends that fixing part 1 contacts with open holes, effectively fill the gap between open holes and fixing part 1, after filling, slurries just can flow into outlet pipe 31 from the outlet pipe mouth of pipe 32, prevents slurries filling process from producing air gap.
The exit of vacuum pump with vent valve 53 is connected, and closes slurry-inlet valve 52 and slurry-supplying valve 33, open vent valve 53 and by vacuum pump, grouting mechanism is vacuumized, thus the gas in grouting mechanism is discharged, prevent gas in follow-up filling process from producing air gap; After having vacuumized, closing vent valve 53, open slurry-inlet valve 52, slurries are poured into by inlet pipe 51 in outer tube 4 and open holes and fill gap, and during grouting, pressure reaches 0.005MPa.
Gap-fill in outer tube 4 and open holes completes, open slurry-supplying valve 33, slurries at fixing part 1 slurry output end flow into outlet pipe 31 by the outlet pipe mouth of pipe 32, and discharge by slurry-supplying valve 33, the outlet pipe mouth of pipe 32 is arranged near fixing part 1 slurry output end, during grout filling gap, slurries can effectively fill the gap of open holes. The pad 7 of sealing mechanism is provided with outlet pipe fixed orifices 73, outlet pipe 31 is through outlet pipe fixed orifices 73, outlet pipe 31 is fixed by outlet pipe fixed orifices 73, thus realize sealing mechanism to the fixed action of outlet pipe 31, also by outlet pipe fixed orifices 73, the outside of outlet pipe 31 is sealed, prevent slurries from overflowing from the contact position of outlet pipe 31 with pad 7.
Sealing mechanism comprises the first flange 61, the 2nd flange 62 and pad 7, and the 2nd described flange 62 is connected mutually with the sealed end of outer tube 4, is provided with pad 7 between the 2nd described flange 62 and the first flange 61. First flange 61, the 2nd flange 62 and pad 7, for being sealed by outer tube 4 sealed end, prevent from the one hand leaking gas in the process vacuumized, on the other hand, prevent slurries from overflowing from the sealed end of outer tube 4.
Described sealing mechanism is provided with fixed orifices, in order to stationary heat galvanic couple and outlet pipe 31. The pad 7 of sealing mechanism is provided with the first fixed orifices 71, the 2nd fixed orifices 72 and outlet pipe fixed orifices 73, first thermopair 21, the 2nd thermopair 22 are fixed by the first fixed orifices 71, the 2nd fixed orifices 72, and outlet pipe 31 is fixed by outlet pipe fixed orifices 73. While first thermopair 21, the 2nd thermopair 22 are fixed by the first fixed orifices 71, the 2nd fixed orifices 72, also contact position by pad 7 and the first thermopair 21, the 2nd thermopair 22 seals, and prevents slurries from overflowing from the first thermopair 21, the 2nd thermopair 22 with the contact position of 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 2nd flange 62, the first flange 61, the 2nd flange 62 and pad 7 are fixed by screw by screw fixed hole. First flange 61 and the 2nd flange 62 are fixed by screw, and are sealed by outer tube 4 by the first flange 61, the 2nd flange 62 and pad 7.
Existing blast furnace thermocouple erecting equipment, when being in the milk after thermopair is installed, slurry cannot effectively fill gap and the exhaust of open holes at thermocouple temperature sensitive head place, cannot directly contact between thermopair with carbon brick, easily produce vent plug, easily cause the installation of TC inaccurate, thermopair heat conduction, survey temperature are made a big impact, make thermopair that the measuring error of blast furnace hearth, 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 shown in Figure 5, the installation method of the thermopair of the present invention, its concrete steps are as follows:
Step one: boring
Adopt drilling machine to hole from stove skin 8 surface, after having holed, it is open holes; The concrete steps of boring are as follows:
A) adopting drilling machine to hole on stove skin 8 surface after blast furnace staying, drill bit is successively through stove skin 8, filler 9, cooling stave 10 and ramming mass 11, and bores into carbon brick 12, is open holes after having holed; Boring terminates position and is open holes end, and open holes end-to-end distance is 565mm from the horizontal throw on stove skin 8 surface, and the diameter of open holes is 30mm.
B) hairbrush is adopted to be cleared up by open holes. The particulate matter produced in boring procedure is removed.
Step 2: install thermopair
Being loaded by thermopair in open holes, slurries pour into fills gap in open holes, and namely slurries complete to install after solidifying. The concrete steps installing thermopair are as follows:
A) pre-treatment: by the installation of TC on fixing part 1, utilizes syringe to inject slurries on the carbon brick of open holes end; Detailed step is as follows:
A) utilize drilling machine to offer thermopair fixed orifices on fixing part 1, and by thermopair fixed orifices by the installation of TC on fixing part 1; Coated ends at the fixing part 1 that thermopair is housed smears slurry coating 13, and slurry coating 13 is coated with 1-2cm3Slurries;
B) distilled water is adopted to be cleaned by syringe; In syringe, 5cm is loaded after completely dry3Slurries, by in the inlet of syringe insertion open holes, until inlet withstands on the carbon brick 12 of open holes end, slurries are injected the end of open holes 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 slurries is 4cm3, slurries stick on carbon brick 12 and smear evenly.
B) install: thermopair is loaded in open holes with fixing part 1, then slurries is poured into and open holes is filled gap; Detailed step is as follows:
A) fixing
The inboardend of outer tube 4 is arranged on stove skin 8 surface, described outer tube 4 is arranged on stove skin 8 surface by being welded and fixed, first thermopair 21, the 2nd thermopair 22 and fixing part 1 load open holes from outer tube 4, the coated ends end of fixing part 1 withstands on the carbon brick 12 of open holes end, sealing mechanism by outer tube 4 sealed end is fixed sealing again, and detects the resistance to air loss on sealing mechanism, outer tube 4 and stove skin 8 surface; After installation, the horizontal throw on temperature end end face and stove skin 8 surface surveyed by the first thermopair 21 is 465mm, and the horizontal throw of the 2nd thermopair 22 apart from stove skin 8 surface is 565mm; The horizontal throw that temperature end end face and the 2nd thermopair 22 survey warm end end face surveyed by first thermopair 21 is 100mm.
B) vacuumize
The exit of vacuum pump with vent valve 53 is connected, and closes slurry-inlet valve 52 and slurry-supplying valve 33, open vent valve 53 and vacuumized by vacuum pump; In the process vacuumized, the gas in grouting mechanism, the slurry coating 13 of fixing part 1 and inject the gas of slurries in advance, can precipitation in the process vacuumized, thus prevent air gap.
C) it is in the milk
After having vacuumized, close vent valve 53, open slurry-inlet valve 52 and slurries are poured in outer tube 4 and open holes fill gap, when pressure reaches 0.005MPa when being in the milk, open slurry-supplying valve 33, until outlet pipe 31 has slurries to flow out;
D) compacting
Close slurry-supplying valve 33, increase grouting pressure and reach 0.05MPa, keep 5min;
After furnace compound wind, after the slurries being filled in gap solidify, namely complete to install.
The present invention is arranged at outlet pipe 31 one end away from sealing mechanism due to the outlet pipe mouth of pipe 32, slurries are made to fill in the process in gap at slurries, only slurries are full of whole gap, slurries just can flow into outlet pipe 31 from the outlet pipe mouth of pipe 32, effectively fill the gap of open holes, prevent slurries filling process from producing air gap; Fixing part 1 coated ends is provided with slurry coating 13, when slurry coating 13 makes the coated ends of fixing part 1 fully contact with open holes end, can effectively discharge the gas of open holes end, and gap effectively, is fully filled, thus effectively eliminate the air gap that slurries filling process produces, thermopair after installing directly is contacted, it is to increase survey the tolerance range of temperature with between carbon brick 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 thermopair of the present invention, when fixing part 1 is carried out pre-treatment, the coated ends at the fixing part 1 that thermopair is housed smears slurry coating 13, and adopts syringe on the carbon brick 12 of open holes end, inject slurries in advance, when fixing part 1 contacts with open holes end, prevent air gap so that slurries are fully filled, thus effectively eliminating the air gap that slurries filling process produces so that the temperature actual response of thermocouple measurement goes out the temperature of cupola well carbon brick.
Composition graphs 7, blast furnace thermocouple is changed in execute-in-place process: the online mounting process of blast furnace thermocouple, and concrete steps are as follows:
Step one: Digitalisation, adopts drilling machine to hole from stove skin 8 surface, when boring is to carbon brick 12, and measuring tempeature, and to record temperature be t, is open holes after having holed; Detailed step is as follows:
A) adopting drilling machine to hole on stove skin 8 surface after blast furnace staying, drill bit is successively through stove skin 8, filler 9, cooling stave 10 and ramming mass 11, and bores into carbon brick 12, is open holes after having holed;
B) hole is the first survey temperature point in the middle part of carbon brick 12, and the first survey temperature point is 465mm with the horizontal throw on stove skin 8 surface, and it is t that temperature point carbon brick 12 temperature is surveyed in measurement first1, at the end of boring, it being the end of open holes, the end of open holes is the 2nd warm point of survey, and the horizontal throw on the 2nd survey temperature point and stove skin 8 surface is 565mm, and it is t that temperature point carbon brick 12 temperature is surveyed in measurement the 2nd2; By temperature t1And t2Record as shown in table 1, and adopt hairbrush to be cleared up by open holes.
Step 2: install thermopair
Being loaded by thermopair in open holes, slurries pour into fills gap in open holes, and namely slurries complete to install after solidifying. The concrete steps installing thermopair are as follows:
A) pre-treatment: by the installation of TC on fixing part 1, utilizes syringe to inject slurries on the carbon brick of open holes end; Detailed step is as follows:
A) utilize drilling machine to offer thermopair fixed orifices on fixing part 1, and by thermopair fixed orifices by the installation of TC on fixing part 1; Coated ends at the fixing part 1 that thermopair is housed smears slurry coating 13, and slurry coating 13 is coated with 1-2cm3Slurries;
B) distilled water is adopted to be cleaned by syringe; In syringe, 5cm is loaded after completely dry3Slurries, by in the inlet of syringe insertion open holes, until inlet withstands on the carbon brick 12 of open holes end, slurries are injected the end of open holes 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 slurries is 4cm3, slurries stick on carbon brick 12 and smear evenly.
B) install: thermopair is loaded in open holes with fixing part 1, then slurries is poured into and open holes is filled gap; Detailed step is as follows:
A) fixing
The inboardend of outer tube 4 is arranged on stove skin 8 surface, described outer tube 4 is arranged on stove skin 8 surface by being welded and fixed, first thermopair 21, the 2nd thermopair 22 and fixing part 1 load open holes from outer tube 4, the coated ends end of fixing part 1 withstands on the carbon brick 12 of open holes end, sealing mechanism by outer tube 4 sealed end is fixed sealing again, and detects the resistance to air loss on sealing mechanism, outer tube 4 and stove skin 8 surface; After installation, the horizontal throw on temperature end end face and stove skin 8 surface surveyed by the first thermopair 21 is 465mm, and the horizontal throw of the 2nd thermopair 22 apart from stove skin 8 surface is 565mm; The horizontal throw that temperature end end face and the 2nd thermopair 22 survey warm end end face surveyed by first thermopair 21 is 100mm.
B) vacuumize
The exit of vacuum pump with vent valve 53 is connected, and closes slurry-inlet valve 52 and slurry-supplying valve 33, open vent valve 53 and vacuumized by vacuum pump; In the process vacuumized, the gas in grouting mechanism, the slurry coating 13 of fixing part 1 and inject the gas of slurries in advance, can precipitation in the process vacuumized, thus prevent air gap.
C) it is in the milk
After having vacuumized, close vent valve 53, open slurry-inlet valve 52 and slurries are poured in outer tube 4 and open holes fill gap, when pressure reaches 0.005MPa when being in the milk, open slurry-supplying valve 33, until outlet pipe 31 has slurries 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 the slurries being filled in gap solidify, reading the registration of the thermopair after installing, wherein the first thermopair 21 measuring tempeature is t '1, the 2nd thermopair 22 measuring tempeature is t '2;
B) as | (t1-t��1)/t |��5%, | (t2-t��2)/t |��5%, and | 1-(t '2-t��1)/(t2-t1) |��10%, namely determine that the installation of TC is accurate, meet use standard; Otherwise, then reinstall, and repeating step one to step 3.
Comparative example 1
The basic content of this comparative example is with embodiment 1, its difference is: the step 2 of the online mounting process of blast furnace thermocouple: adopt innovation and creation: the thermopair (patent No. ZL201220006445.7) installed online for blast furnace carries out blast furnace thermocouple installation, after installation, the temperature that the horizontal throw on recording distance stove skin 8 surface is the first survey temperature point thermopair of 465mm is t1, the temperature that the horizontal throw on recording distance stove skin 8 surface is the 2nd survey temperature point thermopair of 565mm is t2, record as shown in table 1.
The survey temperature numerical value of thermopair installed by table 1
| Depth of penetration | Measuring tempeature | Embodiment 1 | Comparative example 1 |
| First surveys temperature point (465mm) | 174 | 177 | 157 |
| 2nd surveys temperature point (565mm) | 273 | 270 | 234 |
| The temperature difference | 101 | 93 | 77 |
| |(t1-t��1)/t1| | ���� | 1.7% | 9.8% |
| |(t2-t��2)/t2| | ���� | 1.1% | 14.3% |
| |1-(t��2-t��1)/(t2-t1)| | ���� | 7.9% | 23.8% |
As shown in Table 1, embodiment 1 | (t1-t��1)/t1|=1.7% < 5%, | (t2-t��2)/t2|=1.5% < 5%, and | 1-(t '2-t��1)/(t2-t1) |=7.9% < 10%, adopts the installation of TC method of embodiment 1, and the installation of TC is accurate, meets use standard. And comparative example 1 | (t1-t��1)/t |=9.7% > 5%, | (t2-t��2)/t |=14.3% > 5%, and | 1-(t '2-t��1)/(t2-t1) |=23.8% > 10%, adopts the installation of TC method of comparative example 1, and the installation of TC is inaccurate, does not meet use standard. Then reinstall, and repeating step one to step 3.
|(t1-t��1)/t |=9.7% > 5%, | (t2-t��2)/t |=14.3% > 5%, and | 1-(t '2-t��1)/(t2-t1) |=13.8% > 10%, the thermopair error that comparative example 1 is installed is bigger, its reason is: when thermopair equipment is in the milk after installing thermopair, slurry cannot effectively fill gap and the exhaust of perforate at thermocouple temperature sensitive head place, cannot directly contact between thermopair with carbon brick, easily produce vent plug, cause heat transfer not smooth; Thus causing the thermopair after installation, temperature measurement error is relatively big, and the temperature thus measured also cannot go out the temperature of cupola well, furnace bottom carbon brick by actual response.
The present embodiment is installed in thermopair process at blast furnace, effectively prevents air gap so that slurries are fully filled, thus effectively eliminates the air gap that slurries filling process produces so that the temperature actual response of thermocouple measurement goes out the temperature of cupola well carbon brick.
In addition, existing blast furnace thermocouple mounting process, it is difficult to whether conformance with standard after effectively judging the installation of TC, after often causing 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, the front and back temperature difference that creative proposition surveys temperature point by contrasting, two survey warm some temperature difference differences, thus judge whether the installation of TC meets working condition requirement, ensure that the qualified installation of blast furnace thermocouple, thus monitor blast furnace hearth, furnace bottom carbon brick temperature accurately and effectively.
Embodiment 2
The basic content of the present embodiment is with embodiment 1, and its difference is: in compacting process, closes slurry-supplying valve 33, increases grouting pressure and reaches 0.08MPa, keeps 20min; Outer tube 4 is provided with, with on inlet pipe 51, the internal and external threads matched, and outer tube 4 and inlet pipe 51 are threaded connection, and detects the resistance to air loss of outer tube 4 with inlet pipe 51.
The horizontal throw on temperature end end face and stove skin 8 surface surveyed by first thermopair 21 is 515mm, and the horizontal throw of the 2nd thermopair 22 apart from stove skin 8 surface is 565mm; The horizontal throw that temperature end end face and the 2nd thermopair 22 survey warm end end face surveyed by first thermopair 21 is 50mm. First survey temperature point is 515mm with the horizontal throw on stove skin 8 surface, first survey temperature point is surveyed temperature end end face with the first thermopair 21 and is positioned at same vertical position, 2nd survey temperature point is 565mm with the horizontal throw on stove skin 8 surface, and the 2nd warm point of survey is surveyed temperature end end face with the 2nd thermopair 22 and is positioned at same vertical position. In installation process, measure t and t and record as shown in table 2.
The survey temperature numerical value of thermopair installed by table 2
| Depth of penetration | Measuring tempeature | Embodiment 1 |
| First surveys temperature point (515mm) | 215 | 209 |
| 2nd surveys temperature point (565mm) | 275 | 273 |
| The temperature difference | 60 | 64 |
| |(t1-t1��)/t1| | ���� | 2.8% |
| |(t2-t��2)/t2| | ���� | 0.7% |
| |1-(t��2-t��1)/(t2-t1)| | ���� | 6.7% |
As shown in Table 2, embodiment 1 | (t1-t��1)/t1|=2.8% < 5%, | (t2-t��2)/t2|=0.7% < 5%, and | 1-(t '2-t��1)/(t2-t1) |=6.7% < 10%, adopts the installation of TC method of embodiment 2, and the installation of TC is accurate, meets use standard.
Embodiment 3
The basic content of the present embodiment is with embodiment 1, and its difference is: in compacting process, closes slurry-supplying valve 33, increases grouting pressure and reaches 0.1MPa, keeps 15min. The horizontal throw on temperature end end face and stove skin 8 surface surveyed by first thermopair 21 is 415mm, and the horizontal throw of the 2nd thermopair 22 apart from stove skin 8 surface is 565mm; The horizontal throw that temperature end end face and the 2nd thermopair 22 survey warm end end face surveyed by first thermopair 21 is 150mm. In installation process, first survey temperature point is 415mm with the horizontal throw on stove skin 8 surface, first survey temperature point is surveyed temperature end end face with the first thermopair 21 and is positioned at same vertical position, 2nd survey temperature point is 565mm with the horizontal throw on stove skin 8 surface, and the 2nd warm point of survey is surveyed temperature end end face with the 2nd thermopair 22 and is positioned at same vertical position. In installation process, measure t and t and record as shown in table 3.
The survey temperature numerical value of thermopair installed by table 3
| Depth of penetration | Measuring tempeature | Embodiment 1 |
| First surveys temperature point (415mm) | 116 | 112 |
| 2nd surveys temperature point (565mm) | 272 | 269 |
| The temperature difference | 156 | 158 |
| |(t1-t��1)/t1| | ���� | 3.4% |
| |(t2-t��2)/t2| | ���� | 1.1% |
| |1-(t��2-t��1)/(t2-t1)| | ���� | 1.3% |
As shown in Table 3, embodiment 1 | (t1-t��1)/t1|=3.4% < 5%, | (t2-t��2)/t2|=1.1% < 5%, and | 1-(t '2-t��1)/(t2-t1) |=1.3% < 10%, adopts the installation of TC method of embodiment 3, and the installation of TC is accurate, meets use standard.
Embodiment 4
The basic content of the present embodiment is with embodiment 1, its difference is: as shown in Figure 6, fixing part 1 has been offered 3 thermopair fixed orificess, the survey Wen Duan of the first thermopair 21, the 2nd thermopair 22 and three thermocouple is arranged in thermopair fixed orifices, and has offered the first fixed orifices 71, the 2nd fixed orifices 72, outlet pipe fixed orifices 73 and the 3rd fixed orifices 74 on pad 7; First thermopair 21, the 2nd thermopair 22 and three thermocouple are fixed by the first fixed orifices 71, the 2nd fixed orifices 72 and the 3rd fixed orifices 74 respectively.
The horizontal throw on temperature end end face and stove skin 8 surface surveyed by first thermopair 21 is 415mm, and the horizontal throw of the 2nd thermopair 22 apart from stove skin 8 surface is 515mm, and the horizontal throw on three thermocouple distance stove skin 8 surface is 565mm; The horizontal throw that temperature end end face and three thermocouple 22 survey warm end end face surveyed by first thermopair 21 is 150mm. In installation process, first survey temperature point is 415mm with the horizontal throw on stove skin 8 surface, first survey temperature point is surveyed temperature end end face with the first thermopair 21 and is positioned at same vertical position, 2nd survey temperature point is 515mm with the horizontal throw on stove skin 8 surface, and the 2nd warm point of survey is surveyed temperature end end face with the 2nd thermopair 22 and is positioned at same vertical position; 3rd survey temperature point is 565mm with the horizontal throw on stove skin 8 surface, and the 3rd warm point of survey is surveyed warm end end face with three thermocouple and is positioned at same vertical position. In installation process, measure t and t and record as shown in table 4.
The survey temperature numerical value of thermopair installed by table 4
| Depth of penetration | Measuring tempeature | Embodiment 1 |
| First surveys temperature point (415mm) | 117 | 112 |
| 2nd surveys temperature point (515mm) | 214 | 213 |
| 3rd surveys temperature point (565mm) | 272 | 275 |
| |(t1-t��1)/t1| | ���� | 4.3% |
| |(t2-t��2)/t2| | ���� | 0.5% |
| |(t3-t��3)/t3| | ���� | 1.1% |
| |1-(t��3-t��1)/(t3-t1)| | ���� | 5.2% |
| |1-(t��3-t��2)/(t3-t2)| | ���� | 6.9% |
As shown in Table 4, embodiment 1 | (t1-t��1)/t1 |=4.3% < 5%, | (t2-t��2)/t2 |=0.4% < 5%, | (t3-t��3)/t2 |=1.1% < 5%, and | 1-(t '3-t��1)/(t3-t1) |=5.2% < 10%, | 1-(t '3-t��2)/(t3-t2) |=6.9% < 10%, adopts the installation of TC method of embodiment 4, and the installation of TC is accurate, meets use standard.
Schematically the present invention and enforcement mode 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 the those of ordinary skill of this area enlightens by it, when not departing from the invention objective, design the structure mode similar to this technical scheme and embodiment without creativeness, protection scope of the present invention all should be belonged to.
Claims (10)
1. the installation method of a blast furnace hearth and bottom temperature thermocouple, it is characterised in that:
Step one: boring, adopts drilling machine to hole from stove skin (8) surface, is open holes after having holed;
Step 2: installing thermopair, loaded by thermopair in open holes, slurries pour into fills gap in open holes, namely slurries complete to install after solidifying.
2. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 1, it is characterised in that: described step one: the concrete steps of boring are as follows:
A) drilling machine is adopted to hole on stove skin (8) surface after blast furnace staying, drill bit is successively through stove skin (8), filler (9), cooling stave (10) and ramming mass (11), and bore into carbon brick (12), it is open holes after having holed;
B) hairbrush is adopted to be cleared up by open holes.
3. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 1 and 2, it is characterised in that: described step 2: the concrete steps installing thermopair are as follows:
A) pre-treatment: by the installation of TC on fixing part (1), utilizes syringe to inject slurries on the carbon brick of open holes end;
B) install: thermopair is loaded in open holes with fixing part (1), then slurries is poured into and open holes is filled gap.
4. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 3, it is characterised in that: described step 2: install A in thermopair) pretreated concrete steps are as follows:
A) utilize drilling machine to offer thermopair fixed orifices on fixing part (1), and by thermopair fixed orifices by the installation of TC on fixing part (1); Coated ends at the fixing part (1) that thermopair is housed smears slurry coating (13);
B) distilled water is adopted to be cleaned by syringe; In syringe, slurries are loaded after completely dry, by in the inlet of syringe insertion open holes, until inlet withstands on the carbon brick (12) of open holes end, slurries are injected the end of open holes by extruding syringe, stick on carbon brick (12), and smear evenly.
5. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 4, it is characterised in that: described step 2: install B in thermopair) concrete steps installed are as follows:
A) fixing
The inboardend of outer tube (4) is arranged on stove skin (8) surface, first thermopair (21), the 2nd thermopair (22) and fixing part (1) load open holes from outer tube (4), fixing part (1) end withstands on the carbon brick (12) of open holes end, then the sealing mechanism of outer tube (4) sealed end is fixed sealing;
B) vacuumize
The exit of vacuum pump with vent valve (53) is connected, and closes slurry-inlet valve (52) and slurry-supplying valve (33), open vent valve (53) and vacuumized by vacuum pump;
C) it is in the milk
After having vacuumized, close vent valve (53), open slurry-inlet valve (52) to be poured into by slurries in outer tube (4) and open holes and fill gap, then open slurry-supplying valve (33), until outlet pipe (31) has slurries to flow out;
D) compacting
Close slurry-supplying valve (33), increase grouting pressure and reach 0.05-0.1MPa, keep 5-20min;
After furnace compound wind, after the slurries being filled in gap solidify, namely complete to install.
6. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 5, it is characterised in that: the described medullary ray of outer tube (4) and the medullary ray of open holes are on same bar straight line.
7. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 5 or 6, it is characterised in that: fixing part (1) is cylindrical carbon-point, and the circumferential edges place of cylindrical carbon-point has offered thermopair fixed orifices.
8. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 7, it is characterised in that: temperature end end face surveyed by the first thermopair (21) and the 2nd thermopair (22) surveys temperature end end face not on same perpendicular.
9. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 8, it is characterized in that: outer tube (4) is provided with, with on inlet pipe (51), the internal and external threads matched, outer tube (4) and inlet pipe (51) are threaded connection.
10. the installation method of a kind of blast furnace hearth and bottom temperature thermocouple according to claim 8 or claim 9, it is characterized in that: sealing mechanism comprises the first flange (61), the 2nd flange (62) and pad (7), the 2nd described flange (62) is connected mutually with the sealed end of outer tube (4), is provided with pad (7) between the 2nd described flange (62) and the first flange (61).
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| CN107058660A (en) * | 2017-03-01 | 2017-08-18 | 武汉科技大学 | Means for correcting for thermocouple temperature measurement in blast furnace |
| CN107907231A (en) * | 2017-11-28 | 2018-04-13 | 广东工业大学 | A kind of accurate thermocouple temp measuring method under the conditions of liquid cooling |
| CN110527769A (en) * | 2018-07-18 | 2019-12-03 | 广东韶钢松山股份有限公司 | A kind of residual thick judgment method of blast furnace crucibe carbon brick |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107058660A (en) * | 2017-03-01 | 2017-08-18 | 武汉科技大学 | Means for correcting for thermocouple temperature measurement in blast furnace |
| CN107907231A (en) * | 2017-11-28 | 2018-04-13 | 广东工业大学 | A kind of accurate thermocouple temp measuring method under the conditions of liquid cooling |
| CN110527769A (en) * | 2018-07-18 | 2019-12-03 | 广东韶钢松山股份有限公司 | A kind of residual thick judgment method of blast furnace crucibe carbon brick |
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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 |
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