CN101504319B - Blast furnace online small-bore micro-damage furnace hearth side wall temperature detection method - Google Patents
Blast furnace online small-bore micro-damage furnace hearth side wall temperature detection method Download PDFInfo
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- CN101504319B CN101504319B CN2009100147448A CN200910014744A CN101504319B CN 101504319 B CN101504319 B CN 101504319B CN 2009100147448 A CN2009100147448 A CN 2009100147448A CN 200910014744 A CN200910014744 A CN 200910014744A CN 101504319 B CN101504319 B CN 101504319B
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Abstract
The invention provides a method for detecting temperature of the side wall of a small-bore micro-damage crucible of a blast furnace on line, and belongs to the technical field of blast furnace smelting crucible detection. The detecting method comprises the following steps that: 1) a blast furnace to be detected comprises a furnace shell, a cooling wall and carbon bricks, and padding is filled between the furnace shell and the cooling wall and between the cooling wall and the carbon bricks respectively; 2) detecting points and depths of the detecting points are determined, the detecting points are respectively distributed in clearances of the cooling wall on the side wall of the crucible, and the depths of the detecting points are determined according to a medium to be detected and the thickness of the medium; 3) the surface of the furnace shell of the crucible to be detected is provided with horizontal holes according to the detecting points and the depths of the detecting points determined in the step 2); 4) a thermocouple with a sheath is placed in a horizontal hole, a sealing element is fixed on the furnace shell, and the thermocouple with the sheath is fixed on the crucible to be detected; and 5) the thermocouple and PLC are connected through a thermocouple lead wire to realize real-time detection and acquire solid temperature variation gradient. The method has the characteristics of simpleness, convenience, reliability, less investment, less maintenance and installation without blast furnace overhaul.
Description
Technical field
The present invention relates to a kind of blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method, belong to blast furnace process cupola well monitoring technical field.
Background technology
Blast furnace hearth and bottom is the decision restricted link of campaign life, and cupola well all has successful experience both at home and abroad with the monitoring of upper part body of heater, and cupola well furnace bottom position is because the singularity of its position and structure, and hearth erosion research is a focus and difficult point problem.It is reported, hearth erosion has furnace lining ablation monitoring, measures apparatus and method such as corroding thickness, continuous temperature measurement at present, calculate the purpose that realizes that hearth erosion detects with components and parts measuring media temperature such as optical fiber, thermopair with to cooling wall temperature and flow parameter respectively, the validity of monitoring device and monitoring method can normal continuously permanent operation based on the monitoring components and parts." a kind of blast furnace lining ablation monitor " of patent CN254146, there is the optical fiber that protects fine flexible pipe directly to imbed in the refractory brick brickwork joint, belongs to and to change after disposable components and parts damage, in concrete construction jointing, filler tamping process, optical fiber damages easily, and bringing normally into operation is difficult to realize testing goal." device that the blast furnace crucibe continuous temperature measurement is used " of patent CN1757757 is that the carbon brick grooving is put into groove with thermopair, and continuous temperature measurement will lose efficacy the undeclared problem how to change if thermopair damages the back.More than device must be at blast furnace could be realized in the newly-built or overhaul, and after the damage of disposable components and parts, can't change, cause failure of apparatus, when needing detecting element really to play a role, can't use, completely lose the purpose that hearth erosion is detected to the State of Blast Furnace labour later stage.
Summary of the invention
The objective of the invention is to overcome must be when newly-built or overhaul pre-buried monitoring components and parts and the daily defective that can't safeguard replacing, provide a kind of easy, reliable, small investment and maintenance little, the blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method that does not need blast furnace overhaul just can install.
A kind of blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method, method is as follows:
1) cupola well to be measured comprises stove skin, cooling wall and carbon brick, is tamping with filler respectively between stove skin and the cooling wall and between cooling wall and the carbon brick;
2) determine the check point and the check point degree of depth; Check point is distributed in respectively in the cupola well sidewall cooling wall slit, and the check point degree of depth is determined according to survey medium and dielectric thickness;
3) according to step 2) the definite check point and check point degree of depth, in cupola well stove skin surface level punching to be measured;
4) will insert in the lateral aperture with the galvanic couple of sheath, seal will be fixed on the stove skin, and will be with the galvanic couple of sheath firmly to be installed on the cupola well to be measured;
5) by the galvanic couple lead wire galvanic couple is connected with PLC, realizes monitoring in real time, obtain three-dimensional temperature rate of change.
The described filler of step 1) comprises grouting material and ramming mass, and the grouting material is anhydrous pressure injection mud, and ramming mass is that graphite matter charcoal element is smash material.
Step 2) definite method of described check point is: according to furnace bottom and cupola well sidewall absolute altitude, be chosen in cupola well and bottom refractory place the cooling parietal layer and the layer between transverse joint on and on the perps between cooling wall piece and the piece.
Step 2) definite method of the described check point degree of depth is: galvanic couple inserts the degree of depth and stove skin, cooling wall and the depth of packing sum in the carbon brick.
For example, measure the carbon brick temperature, galvanic couple inserts the degree of depth 100mm in the carbon brick, and then the check point degree of depth equals stove skin thickness, grouting material thickness, cooling wall thickness and ramming mass thickness sum, adds the degree of depth 100mm in the galvanic couple insertion carbon brick.
The described PLC of step 5) is a Schneider Qutumn CPU53414A product.
Above-mentioned PLC is a conventional term, and English full name ProgrammableLogicController, Chinese are " Programmable Logic Controller ", is called for short PLC.PLC is based on robot calculator, and is applicable to the electric controller of industry spot work.It comes from relay control device, but it is unlike relay system, and the physical process by circuit realizes control, and mainly is stored in program in the PLC internal memory by operation, goes into out the information conversion realization and controls.
The present invention has following advantage compared with prior art: can implement without the overhaul maintenance repair, this is a biggest advantage; Directly stretch into each aspect of cupola well and measure, realize the measurement of different level; Can stretch into easily between each medium, realize the accurate measurement of carbon brick, filler, cooling wall hot-face temperature, obtain the measurement data of different medium and different depth; By the measurement between level and each medium, the horizontal and longitudinal stereoscopic temperature rate of change from the bottom to top outside acquisition is reached by the lining provides basic data accurately for studying hearth erosion; This method equipment investment is little, construction is simple, maintenance is little.
Description of drawings
Fig. 1 is the detection part elevation cut-away view of cupola well and furnace bottom.
Fig. 2 detects the local front cut-away view that launches of cooling wall for cupola well.
Fig. 3 is a mounting structure synoptic diagram of the present invention.
Wherein, 1, galvanic couple, 2, cupola well to be measured, 3, cooling wall, 4, cooling wall slit anyhow, 5, the stove skin, 6, filler, 7, carbon brick, 8, hearth wall, 9, sheath, 10, seal, 11, galvanic couple lead wire.
Embodiment
The invention will be further described below in conjunction with drawings and Examples, but be not limited thereto.
Example:
A kind of blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method, as Fig. 1, Fig. 2 and shown in Figure 3, detection method is as follows:
As shown in Figure 1, cupola well 2 to be measured, tamps with grouting material and ramming mass respectively between cooling wall 3 and the carbon brick 7 between stove skin 5 and the cooling wall 3 from outside to inside being made up of stove skin 5, cooling wall 3 and carbon brick 7.The grouting material is anhydrous pressure injection mud, and ramming mass is that graphite matter charcoal element is smash material.
Check point is distributed in respectively in the different cooling walls of the cupola well sidewall slit, according to furnace bottom and cupola well sidewall absolute altitude, the cooling parietal layer that is chosen in cupola well and bottom refractory place with layer between transverse joint on and on the perps between cooling wall piece and the piece.Measure at four different levels respectively as Fig. 1, corresponding diagram 2 as seen, each measuring point is distributed in the top in 2 layers 15 groups and 16 groups cooling wall perps cracks respectively, 2, in 3 layers of cooling wall transverse joint crack, 3 layers of cooling wall middle part, 14 groups and 15 groups cold parietal suture cracks and bottom, 15 groups and 16 groups cold parietal suture cracks of 3 layers of cooling wall.
After determining the good horizontal particular location that needs to measure, see Fig. 3, determine the concrete insertion depth that to measure according to technological requirement again.The check point degree of depth determines according to dielectric thickness, and the method for determining is that galvanic couple inserts the degree of depth in the carbon brick and stove skin, depth of packing sum.As measure the carbon brick temperature, and insertion depth is 100mm, then the check point degree of depth equals stove skin thickness, grouting material thickness, cooling wall thickness and ramming mass thickness sum, adds insertion depth 100mm.
After determining good horizontal particular location and galvanic couple insertion depth, see that Fig. 2 locatees, use electric drill and common drill bit on horizontal line, to hole, on drill bit, carry out mark according to the galvanic couple insertion depth, to guarantee accurately to pierce the degree of depth, after boring is finished, with seal 10 and the welding of stove skin, galvanic couple 1 level of band sheath is touched in the patchhole, measure the part in the exposed outside, determine whether actual insertion depth is consistent with predetermined insertion depth, will be with the galvanic couple 1 of sheath firmly to be installed in (the supporting web member of available galvanic couple is connected with welded seal spare flange) on the cupola well to be measured.
By galvanic couple lead wire 11 galvanic couple 1 is connected with PLC (Schneider Qutumn CPU53414A product), realizes monitoring in real time, obtain three-dimensional temperature rate of change.
Laigang Stocks Trading Co company limited iron-smelter on January 19th, 2008 in 2 of online production
#Blast furnace has been implemented this method.On January 24th, 2008 is 3
#Blast furnace is implemented this method, finds the cupola well side wall temperatures up to 710 ℃, judgement thus, 3
#Blast furnace cupola well herein seriously corrodes, and has taked to fall furnace retaining measures such as smelting is strong, air port line feeding, and has carried out overhaul in May, 2008, and overhaul is corroded and dissected the accuracy of having verified this detection method.3
#The discovery of blast furnace abnormal erosion point is the successful Application first time of this detection method.On March 23rd, 2008 is 4
#Blast furnace is implemented, and finds between 4 to 5 groups on the second layer cooling wall top carbon brick temperature up to 570 ℃, abnormal erosion, 4
#Blast furnace enters the furnace retaining phase immediately, and carries out large repairs in September, 2008, and overhaul is corroded and dissected the accuracy of having verified this detection method once more.
Claims (5)
1. blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method is characterized in that detection method is as follows:
1) cupola well to be measured comprises stove skin, cooling wall and carbon brick, is tamping with filler respectively between stove skin and the cooling wall and between cooling wall and the carbon brick;
2) determine the check point and the check point degree of depth; Check point is distributed in respectively in the cupola well sidewall cooling wall slit, and the check point degree of depth is determined according to dielectric thickness;
2) according to step 2) the definite check point and check point degree of depth, in cupola well stove skin surface level punching to be measured;
3) will insert in the lateral aperture with the galvanic couple of sheath, seal will be fixed on the stove skin, and will be with the galvanic couple of sheath firmly to be installed on the cupola well to be measured;
4) by the galvanic couple lead wire galvanic couple is connected with PLC, realizes monitoring in real time, obtain three-dimensional temperature rate of change.
2. a kind of blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method as claimed in claim 1 is characterized in that, the described filler of step 1) comprises grouting material and ramming mass, and the grouting material is anhydrous pressure injection mud, and ramming mass is that graphite matter charcoal element is smash material.
3. a kind of blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method as claimed in claim 1, it is characterized in that, step 2) definite method of described check point is: according to furnace bottom and cupola well sidewall absolute altitude, be chosen in cupola well and bottom refractory place the cooling parietal layer and the layer between transverse joint on and on the perps between cooling wall piece and the piece.
4. a kind of blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method as claimed in claim 1, it is characterized in that step 2) definite method of the described check point degree of depth is: the check point degree of depth is that galvanic couple inserts the degree of depth and stove skin, cooling wall and the depth of packing sum in the carbon brick.
5. a kind of blast furnace online small-bore micro-damage furnace hearth side wall temperature checking method as claimed in claim 1 is characterized in that, the described PLC of step 5) is a Schneider Qutumn CPU53414A product.
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| CN2009100147448A CN101504319B (en) | 2009-03-02 | 2009-03-02 | Blast furnace online small-bore micro-damage furnace hearth side wall temperature detection method |
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| CN2009100147448A CN101504319B (en) | 2009-03-02 | 2009-03-02 | Blast furnace online small-bore micro-damage furnace hearth side wall temperature detection method |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101748224B (en) * | 2009-12-28 | 2011-06-22 | 莱芜钢铁股份有限公司 | Method for district cooling of blast furnace during blast furnace dissection |
| CN101886153B (en) * | 2010-06-22 | 2011-11-16 | 武汉威林炉衬材料有限责任公司 | Maintenance method for blast furnace hearth |
| CN101907496B (en) * | 2010-08-09 | 2012-02-29 | 首钢总公司 | Testing method of baking temperature of steel ladle |
| CN102226723A (en) * | 2011-04-08 | 2011-10-26 | 五力机电科技（昆山）有限公司 | Automatic temperature measuring device of melting furnace |
| CN103308200B (en) * | 2012-03-16 | 2015-06-17 | 宝山钢铁股份有限公司 | Temperature thermocouple fixing method and temperature thermocouple fixing expansion refractory mortar |
| CN103322960B (en) * | 2013-06-26 | 2016-05-18 | 中冶长天国际工程有限责任公司 | A kind of ring formation of rotary kiln layer thickness detection method and device |
| CN110387450A (en) * | 2018-07-17 | 2019-10-29 | 柳州钢铁股份有限公司 | The device and method that blast furnace crucible corrosion is monitored |
| CN111534658A (en) * | 2020-05-29 | 2020-08-14 | 鞍钢股份有限公司 | Method for detecting air gap between blast furnace shell and cooling wall |
| CN111809013A (en) * | 2020-07-10 | 2020-10-23 | 首钢集团有限公司 | Online installation method for blast furnace hearth thermocouple |
| CN112481434A (en) * | 2020-12-03 | 2021-03-12 | 山东钢铁股份有限公司 | Blast furnace baking method and blast furnace |
| CN113566691A (en) * | 2021-06-28 | 2021-10-29 | 河钢股份有限公司 | Blast furnace tapping main channel online monitoring device and method |
| CN115747399A (en) * | 2022-11-22 | 2023-03-07 | 武汉钢铁有限公司 | Method for repairing hearth thermocouple of blast furnace in later campaign |
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