CN1757757A - Temperature measuring device of blast furnace crucible and its manufacturing method - Google Patents
Temperature measuring device of blast furnace crucible and its manufacturing method Download PDFInfo
- Publication number
- CN1757757A CN1757757A CN200510044252.5A CN200510044252A CN1757757A CN 1757757 A CN1757757 A CN 1757757A CN 200510044252 A CN200510044252 A CN 200510044252A CN 1757757 A CN1757757 A CN 1757757A
- Authority
- CN
- China
- Prior art keywords
- celion
- blast furnace
- graphite carbon
- carbon brick
- thermopairs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A device for continuously measuring the temp of furnace hearth in blast furnace is composed of a thermoelectric couple with dual graphite carbon fibers, a pure-graphite carbon brick containing said thermoelectric couple at its axial center position, and a display system. Said pure-graphite carbon brick is installed to the furnace wall on a horizontal level with the tap. Its advantages are continuous measuring, high resistance to high temp and corrosion, and low cost.
Description
Affiliated technical field
The invention belongs to the testing apparatus in the smelting iron and steel, particularly be blast furnace hearth device and preparation method thereof in the ironmaking
Background technology
Utilizing the temperature changing process in the continuous temperature measurement technology for detection blast furnace hearth, to instruct blast furnace operating, is the advanced method that domestic and international in recent years blast furnace is imagined employing always.But because blast furnace itself is an airtight reactor, the furnace cylinder working inclement condition, except that can observing at air port place in the stove the tuyere zone situation, all the other can only by see slag, see iron, material speed and relatively by the analysis-by-synthesis of various instrument, could judge the working of a furnace indirectly, and then adopt an effective measure.Up to the present, only retrieve three pieces of patents relevant with blast furnace temperature, application number is 02212863.8 and 02110077.2 " blast furnace lining ablation monitor and monitoring method thereof ", is to be embedded in the mode that lead in the furnace wall reports to the police and to point out furnace lining ablation situation to blow, and can not continuous temperature measurement; The 3rd piece is number of patent application 99241371.0 " Thermo detector for blast furnace ", and it can only measure the temperature on iron-smelting blast furnace top, and temperature is low herein, and the device of energy continuously tested blast furnace hearth layer temperature does not appear in the newspapers.
Summary of the invention
The purpose of this invention is to provide a kind of temperature changing trend that can be used for the continuously measured blast furnace hearth, and have high temperature resistant, be able to bear strong corrosion, anti-reduction, adapt to cupola well temperature measuring equipment of advantages such as working of a furnace changing capability is strong and preparation method thereof.
The objective of the invention is to realize by following scheme.
The exploitation and the application of blast furnace hearth continuous temperature measurement technology are one of important topics of studying for a long period of time of domestic and international scientific worker always, and applicant and contriver are through studying for many years, test, improving, and cupola well temperature measuring equipment structure is as follows:
1. temperature measuring equipment is made up of pure graphite carbon brick, two celion thermopair; The physical dimension of pure graphite carbon brick is laid bricks similar to blast furnace hearth;
2. two celion thermopairs are arranged in pure graphite carbon brick axial centre groove;
3. two celion thermopair tops flush with the top of pure graphite carbon brick; Thermocouple wire in two celion thermopairs is insulated by protective tube, and its tail end passes the furnace wall and draws.
The making method of cupola well temperature measuring equipment is as follows:
1. make the test brick, will be cut into two portions up and down in the centre with the lay bricks pure graphite carbon brick of appearance similar of cupola well, and recessing on its tangent plane;
2. make thermopair, selecting two celion thermopairs for use is a temperature element, and every galvanic couple silk is with the high-temperature insulation pipe outward;
3. two celion thermopairs are mounted in the groove of pure graphite carbon brick, the thermopair top are flushed with the top of pure graphite carbon brick, and in groove, be full of high-temperature-resistant adhesive, again two portions about the pure graphite carbon brick are bonded as one as packing material;
4. a pure graphite carbon brick that has two celion thermopairs is installed on cupola well iron notch medullary ray at least; General branch four corners of the world four direction is respectively installed a pure graphite carbon brick that has two celion thermopairs; At last the galvanic couple silk is drawn by the high-temperature insulation sleeve pipe, and be connected, promptly can show temperature variations in the cupola well at any time with external indicating system.
The present invention is made up of the special-purpose pure graphite carbon brick of blast furnace hearth and the two graphite thermopairs of carbon fiber and supporting computer data processing system.But the actual temperature of this system's continuous detecting blast furnace hearth has advantages such as high temperature resistant, anticorrosive, safe and reliable, good combination property, less investment.After present device was installed, iron coke per ton ratio can reduce by 10～20kg at least, as presses volume 130m
3Blast furnace is produced 200000 tons of pig iron per year and is calculated, and a year benefit is about ten thousand yuan of 20/1000*200000*0.1=40.Can recoup capital outlay in one month, if count together with overcoming the loss that causes because of blast wandering, its economic benefit is also considerable.By 14 in the existing different scales blast furnace of main office of Ji steel group, according to every average 600m of blast furnace
3, utilization coefficient 3.0 is produced 6000000 tons of the pig iron per year, and a year benefit is crossed hundred million yuan.This shows that as this technology of wide popularization and application, the economic benefit prospect is considerable.Test result is through Beijing correlative study institute:
1. device specifications reaches:
Temperature measurement range: 800-2000 ℃;
Temperature resolution: greater than 1600 ℃ the time, temperature resolution still can reach ± and 8 ℃;
In the time of electromotive force index: 900-1700 ℃ 3mv/100 ℃;
In the time of 1700-2000 ℃ greater than 2mv/100 ℃;
2. system function is: realize and finish the blast furnace hearth continuous temperature measuring function, the temperature of the furnace hearth variation tendency accurately is provided, instruct blast furnace man author correctly to judge the working of a furnace, improve the economic benefit that blast furnace is produced.
Description of drawings
Fig. 1 is a mounting structure synoptic diagram of the present invention
Fig. 2 is the local structure for amplifying synoptic diagram of the present invention
1 is galvanic couple among the figure, the 2nd, and pure graphite carbon brick, the 3rd, galvanic couple lead-in wire, the 4th, blast furnace cooling stave, the 5th, cupola well, the 6th, connecting box, the 7th, pure graphite carbon brick front end, the 8th, galvanic couple front end, the 9th, iron mouth central horizontal line.
Embodiment
Can find out by Fig. 1,2, cupola well 5 is positioned at the body of heater bottom in the body of heater, the iron mouth is arranged in cupola well 5, the skin of blast furnace cooling stave 4 is furnace shells, the internal layer of blast furnace cooling stave 4 is a refractory brick, special pure graphite carbon brick 2 is similar to other refractory brick, as other refractory brick, but to build with blast furnace taphole central horizontal line 9 on; Thermopair 1 is positioned on pure graphite carbon brick 2 central axis, and thermopair front end 8 flushes with pure graphite carbon brick front end 7; Can directly measure the temperature in the cupola well; Thermopair 1 is selected two celion thermopairs for use, makes full use of its high thermal resistance; For being connected with pure graphite carbon brick 2 at two celion thermopairs 1, antiseep is provided with high-temperature adhesives in the groove; For the reinforced insulation sealing, on the furnace shell of pure graphite carbon brick 2 outer ends, fixedly establish the connecting box 6 of sealing, carbon fiber wire and thermocouple lead 3 safety in connecting box 6 in two celion thermopairs 1 are connected.
Above-mentioned pair of celion thermopair 1 is to be the carbon fiber that raw material is made with the polyacrylonitrile, ℃ carries out greying at vacuum oven internal heating to 3000, obtains the galvanic couple negative pole that pure graphite line is done.Again graphite line is carried out boron diffusion under 2700 ℃, the boron graphite line of making boracic 1.5% is as the galvanic couple positive pole.This galvanic couple tensile strength is greater than 2kg/m
2, on probation in 900-2000 ℃ of scope, sensitivity can reach 3mv/100 ℃, and good stability, can satisfy industry fully and measure requirement.
For two celion thermopairs 1 are positioned on the central axis of pure graphite carbon brick 2, pure graphite carbon brick 2 is cut in half and recessing with central axis; The method for packing of thermopair 1 in groove is to penetrate two celion thermopairs 1 in the alundum tube of external diameter 10m, selecting external diameter for use is the outer protective tube of the alundum tube of 16mm as thermopair 1, the high-temperature adhesives of all selecting for use the hot pressing nitrogenize to make between two-layer protective tube and the high purity graphite carbon brick 2 carry out bonding, and by the pure graphite carbon brick 2 of two portions up and down with two graphite thermopair 1 firm be bonded as one, at last with the stainless steel sleeve pipe with thermocouple wire by the perforate position on last furnace shell draw outside the stove be fixed on furnace shell on the box 6 that is tightly connected in be connected, link to each other with external indicating system by lead-in wire 3 by the box 6 that is tightly connected again; The encapsulation of stainless steel sleeve pipe outside and the blast furnace technology of laying bricks is identical.
When the present invention installs, should on blast furnace taphole central horizontal line 9, establish 1 pure graphite carbon brick 2 that studs with two graphite thermopairs 1 at least; In the real work, generally branch four corners of the world four direction is respectively installed 1 pure graphite carbon brick 2 that contains two celion thermopairs 1, and totally four, it is more accurate to design the continuous temperature measurement effect like this.
Surface tension according to 1300 ℃ of pig iron of data of Knguko and KyHuH is 1020 ergs/cm
2, 1400 ℃ is 1120Cm
2Consider that the maximum possible cupola well takes advantage of molten iron 2m dark, slag 1m is thick, and during blast 0.2Kpa, calculating cupola well pressure is 0.36kpa/Cm
2Therefore, do not considering molten iron when the furnace wall hole outwards penetrates under the situation with temperature decline frozen plug hole, during less than the gap of 1mm, molten iron surface tension opposing molten iron penetration power is far longer than the pressure of slag, iron, wind.Consider from the safety in production angle, can get rid of the possibility of hearth breakout fully.
Two iron work 1# blast furnace hearth temperature detection records (actual measurement)
| Time 2005 | Tie Kou southern side (mv) | Cinder notch east side (mv) | The Tie Kou southern side (℃) | The cinder notch east side (℃) | Wind-warm syndrome (℃) | Remarks |
| 11 | 0.75 | 1.0 | / | / | 480 | Scope 1000-1600 ℃ |
| 4.12 | 0.90 | 1.10 | / | / | 487 | |
| 4.13 | / | / | / | / | / | Damping down is torn the cupola well protection tile open |
| 4.14 | 0.93 | 1.50 | / | / | 650 | Spray iron mouth behind the some stove |
| 4.15 | 7.20 | 13.34 | / | / | 850 | Measure when tapping a blast furnace |
| 4.16 | 8.50 | 19.68 | / | / | 860 | |
| 4.17 | 9.62 | 24.40 | / | 1050 | 860 | |
| 4.18 | 11.7 | 23.15 | / | 1021 | 860 | |
| 4.19 | 21.6 | 23.04 | / | 1006 | 912 | The iron oral-lateral changes obviously |
| 4.20 | 24.46 | 23.40 | 1052 | 1024 | 876 | (replacing tuyere small sleeve) |
| 4.21 | 30.34 | 24.47 | 1260 | 1054 | 895 | The morning, 8:00 measured |
| 4.21 | 31.67 | 24.56 | 1380 | 1072 | 898 | Afternoon, 16:00 measured |
| 4.22 | 31.41 | 26.40 | 1309 | 1254 | 900 | This day output 481t |
| 4.23. | 30.2 | 27.8 | 1171 | 1253 | 900 | 11:00 |
| 4.24. | 30.10 | 31.5 | 1310 | 1320 | 900 | 9:00 |
| 4.25.. | 25.20 | 31.8. | 1079 | 1322 | 897 | 8:00 |
| 4.26 | 29.7 | 27.0 | 1239 | 1141 | 900 | 8:30 |
| 4.27 | 24.60 | 26.80 | 1084 | 1147 | 680 | Scheduled overhaul damping down 3h |
| 4-28 | 22.9 | 26.9 | 1002 | 1058 | 930 | 16:00 |
| 4.29 | 22.3 | 22.4 | / | / | 937 | 16:00 |
| 4.30 | 31.42 | 22.1 | 1312 | / | 937 | 9:30 |
| 5.1-8 | Add up separately | |||||
| 5.9 | 21.4 | 21.8 | / | / | 900 | |
| 5.10 | 21.2 | 21.6 | / | / | 900 | |
| 5.11 | 20.5 | 21.7 | / | / | 898 | |
| 5.12 | 22.0 | 21.1 | / | / | 930 | |
| 5.13 | 21.1 | 22.8 | / | / | 930 | |
| 5.14 | 20.4 | 23.1 | / | / | 930 | |
| 5.15 | 19.2 | 23.2 | / | / | 930 | |
| 5.16 | 15.3 | 23.4 | / | 1013 | 937 | |
| 5.17 | 16.1 | 22.4 | / | / | 930 | |
| 5.18 | 20.08 | 22.8 | / | / | 930 | |
| 5.19 | 20.8 | 23.0 | 1233 | 1320 | 930 | Recalibrate the back temperature |
Annotate: select for use FU 189 type digital multimeter to record outcome record: Cui Jianli
Reduced parameter about temperature and thermoelectric force:
| Temperature | Thermoelectric force mV | Remarks |
| 1100 degree | ||
| 1200 degree | 28.65 | (consequent-preceding paragraph) |
| 1300 degree | 31.15 | Differ 2.5 (mV) |
| 1400 degree | 33.75 | 2.6 |
| 1500 degree | 35.65 | 1.9 |
| 1600 degree | 37.00 | 1.35 |
| 1700 degree | Average 2.09 |
Annotate: 1) programming of intelligent digital instrument is to be provided with according to above parameter.
2) variation of up/down is to become nonlinear calibration according to 5 sections variation tendency.
3) cold junction compensation be set to 2 the degree; Being set to manually of mini-printer.Above data are provided by Beijing self-service instrument institute.
Claims (7)
1, a kind of temperature measuring device of blast furnace crucible is characterized by:
1. temperature measuring equipment is made up of pure graphite carbon brick, two celion thermopair; The physical dimension of pure graphite carbon brick is laid bricks similar to blast furnace hearth;
2. two celion thermopairs are arranged in pure graphite carbon brick axial centre groove, are provided with high-temperature-resistant adhesive in the groove;
3. two celion thermopair tops flush with the top of pure graphite carbon brick; The skin of the thermocouple wire in two celion thermopairs is insulated by protective tube, and its tail end stretches out two lead-in wires.
2, temperature measuring device of blast furnace crucible according to claim 1 is characterized by: two galvanic couple lead-in wires that two celion thermopairs are drawn are drawn outside the stove by the box 6 that is tightly connected that is fixed on the last furnace shell, are connected with outside demonstration and print system.
3, temperature measuring device of blast furnace crucible according to claim 1 is characterized by: the C4-1 high-temperature-resistant adhesive that the tackiness agent in the groove is made for the hot pressing nitrogenize.
4, temperature measuring device of blast furnace crucible according to claim 1 is characterized by: the inside and outside protective tube of thermocouple wire is an alundum tube.
5, temperature measuring device of blast furnace crucible according to claim 1 is characterized by: two celion thermopairs are to be that raw material is made carbon fiber with the polyacrylonitrile.
6, the making method of the described temperature measuring device of blast furnace crucible of a kind of claim 1 is:
1. make the test brick, will be cut into two portions up and down in the centre with the cupola well physical dimension pure graphite carbon brick of a size of laying bricks, and recessing on its tangent plane;
2. make thermopair, selecting two celion thermopairs for use is a temperature element, and every galvanic couple silk is with the high-temperature insulation pipe outward;
3. two celion thermopairs are mounted in the groove of pure graphite carbon brick, the thermopair top is flushed with the top of pure graphite carbon brick, and in groove, be full of high-temperature-resistant adhesive as packing material, again two portions about the pure graphite carbon brick be bonded as one;
4. on cupola well iron notch medullary ray horizontal plane, establish 1 pure graphite carbon brick that has two celion thermopairs at least; Commonly used is that branch four corners of the world four direction is respectively installed a pure graphite carbon brick that has two celion thermopairs on iron mouth medullary ray horizontal plane;
5. last, the galvanic couple silk is drawn by the high-temperature insulation sleeve pipe, and be connected with outside microsystem, can measure temperature variations in the cupola well at any time.
7, the making method of temperature measuring device of blast furnace crucible according to claim 5, it is characterized by: two celion thermopairs are to be that raw material is made carbon fiber with the polyacrylonitrile, ℃ carry out greying at vacuum oven internal heating to 3000, obtain pure graphite line as the galvanic couple negative pole; Again graphite line is carried out boron diffusion under 2700 ℃, the boron graphite line of making boracic 1.5% is as the galvanic couple positive pole; This galvanic couple tensile strength is greater than 2kg/m
2, in 900-2000 ℃ of scope, sensitivity can reach 3mv/100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510044252.5A CN1757757A (en) | 2005-08-12 | 2005-08-12 | Temperature measuring device of blast furnace crucible and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510044252.5A CN1757757A (en) | 2005-08-12 | 2005-08-12 | Temperature measuring device of blast furnace crucible and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1757757A true CN1757757A (en) | 2006-04-12 |
Family
ID=36703324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510044252.5A Pending CN1757757A (en) | 2005-08-12 | 2005-08-12 | Temperature measuring device of blast furnace crucible and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1757757A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994831A (en) * | 2014-04-17 | 2014-08-20 | 北京固瑞恩科技有限公司 | Temperature measuring wear-resistant system and installation method thereof |
| CN105136323A (en) * | 2015-09-11 | 2015-12-09 | 河南省天利工业炉有限公司 | Integrally-brick-plugged thermocouple provided with cooling water loop |
| CN107630118A (en) * | 2017-11-17 | 2018-01-26 | 唐山国丰钢铁有限公司 | The thermocouple arrangement of monitoring blast furnace taphole temperature change in real time |
| CN113049132A (en) * | 2021-04-02 | 2021-06-29 | 攀钢集团攀枝花钛材有限公司 | Temperature measurement hole brick and fused salt chlorination furnace with temperature measurement device |
| CN114252302A (en) * | 2021-11-22 | 2022-03-29 | 五冶集团上海有限公司 | Online temperature measurement and gas sampling device and method for chute area of dry quenching furnace |
-
2005
- 2005-08-12 CN CN200510044252.5A patent/CN1757757A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994831A (en) * | 2014-04-17 | 2014-08-20 | 北京固瑞恩科技有限公司 | Temperature measuring wear-resistant system and installation method thereof |
| CN103994831B (en) * | 2014-04-17 | 2017-04-19 | 北京固瑞恩科技有限公司 | Temperature measuring wear-resistant system and installation method thereof |
| CN105136323A (en) * | 2015-09-11 | 2015-12-09 | 河南省天利工业炉有限公司 | Integrally-brick-plugged thermocouple provided with cooling water loop |
| CN105136323B (en) * | 2015-09-11 | 2017-12-22 | 河南天利热工装备股份有限公司 | A kind of overall plug brick thermocouple provided with chilled(cooling) water return (CWR) |
| CN107630118A (en) * | 2017-11-17 | 2018-01-26 | 唐山国丰钢铁有限公司 | The thermocouple arrangement of monitoring blast furnace taphole temperature change in real time |
| CN113049132A (en) * | 2021-04-02 | 2021-06-29 | 攀钢集团攀枝花钛材有限公司 | Temperature measurement hole brick and fused salt chlorination furnace with temperature measurement device |
| CN113049132B (en) * | 2021-04-02 | 2022-03-22 | 攀钢集团攀枝花钛材有限公司 | Temperature measurement hole brick and fused salt chlorination furnace with temperature measurement device |
| CN114252302A (en) * | 2021-11-22 | 2022-03-29 | 五冶集团上海有限公司 | Online temperature measurement and gas sampling device and method for chute area of dry quenching furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1757757A (en) | Temperature measuring device of blast furnace crucible and its manufacturing method | |
| KR20100131236A (en) | Multi thermocouple for multi point measuring and manufacturing method of that | |
| CN108132190A (en) | High temperature multi-load loads in-situ testing device | |
| CN108132189A (en) | High-temp in-situ Biaxial stress test device under continuous alternating temperature | |
| CN101839774B (en) | Composite tube type high-temperature thermocouple | |
| CN101813417A (en) | High temperature moire experimental furnace | |
| CN201195731Y (en) | Temperature measuring equipment for blast furnace well | |
| CN104513880A (en) | Converter sublance body | |
| CN210711615U (en) | Device for monitoring erosion state of converter lining in real time on line | |
| CN103045795B (en) | Liquid level measurement system of converter sublance | |
| CN201041556Y (en) | Detection detector for rotating furnace throwing molten steel crystal carbon location | |
| CN201522464U (en) | Converter throwing-falling type crystal fixed carbon probe | |
| CN201416013Y (en) | Steelmaking carbon content, temperature and oxygen content detection device of converter | |
| CN207596892U (en) | A kind of revolving furnace sublance gun body of double-layer refractory material structure | |
| CN109897936B (en) | Detection system for continuously detecting temperature and components of molten steel in converter steelmaking | |
| CN200981874Y (en) | Revolving furnace throwing-falling type detecting probe | |
| CN2606889Y (en) | Temperature detecting, sampling composite probe | |
| CN201089774Y (en) | Composite probe for five-functional convertor auxiliary gun | |
| CN103641299B (en) | Alkaline refining slag is for the production of the Slag modification method of slag wool | |
| CN202968585U (en) | Temperature measuring device for blast furnace hot air | |
| CN1436861A (en) | Blast furnace lining ablation monitor and monitoring method | |
| CN101798609A (en) | Method for measuring lining temperature by adopting thermo-couple to diagnose lining conditions of blast-furnace bottom and lower hearth | |
| CN204251643U (en) | A kind of revolving furnace sublance rifle body | |
| CN105331759B (en) | Device for detecting stress changes of furnace bottom seal plate of blast furnace | |
| CN201686712U (en) | Device for diagnosing situation of lower hearth lining of blast furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Xu Wenjing Document name: Notice of conformity |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |