CN106312032B - Online ladle residual thick marker method safely - Google Patents
Online ladle residual thick marker method safely Download PDFInfo
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- CN106312032B CN106312032B CN201510350654.1A CN201510350654A CN106312032B CN 106312032 B CN106312032 B CN 106312032B CN 201510350654 A CN201510350654 A CN 201510350654A CN 106312032 B CN106312032 B CN 106312032B
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- ladle
- mark
- flame retardant
- layer
- retardant coating
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003550 marker Substances 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 239000003063 flame retardant Substances 0.000 claims abstract description 18
- 239000000470 constituent Substances 0.000 claims abstract description 13
- 238000004458 analytical method Methods 0.000 claims abstract description 6
- 230000008439 repair process Effects 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000011449 brick Substances 0.000 description 27
- 239000000463 material Substances 0.000 description 15
- 229910052788 barium Inorganic materials 0.000 description 13
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 13
- 238000005259 measurement Methods 0.000 description 11
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 9
- CSSYLTMKCUORDA-UHFFFAOYSA-N barium(2+);oxygen(2-) Chemical compound [O-2].[Ba+2] CSSYLTMKCUORDA-UHFFFAOYSA-N 0.000 description 9
- 239000011819 refractory material Substances 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 5
- 101100230509 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) hat-1 gene Proteins 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000009435 building construction Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000700 radioactive tracer Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000010441 alabaster Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a kind of online ladle residual thick marker method safely, including：Step 1, the ladle with mark flame retardant coating is made, each layer is followed successively by box hat, permanent layer and insulating layer, mark flame retardant coating, working lining, and indicate in flame retardant coating containing the mark element for being melted in molten steel to ladle from outside to inside；Step 2, the content of analysis mark element；Step 3, judge to indicate whether constituent content increases extremely, so as to determine whether ladle needs to repair.The present invention can effectively monitor the safe condition of the steel ladle working layer when holding molten steel, ladle bleed-out is made and is given warning in advance, avoids serious accident, while can reduce and be judged by accident caused by experience is different with ladle liner specific environment, refractory consumption is saved, reduces production cost.
Description
Technical field
The present invention relates to steel-making safety method, more specifically to online ladle residual thick marker method safely.
Background technology
Steel-making is with ladle lining mainly by box hat 1, permanent layer and insulating layer 2, working lining 4 and partial function element group
Into as shown in Figure 1 is structure of refractory figure in a typical ladle.Wherein working lining 4 can be poured into a mould with unsetting castable
Material or laying fireproof bricks.During ladle use, by the high temeperature chemistry erosion of molten steel and mechanical erosion, 4 fire resisting of working lining
Material is constantly etched, and residual thickness (residual thickness) is constantly reduced.When the residual thickness of 4 refractory material of working lining is reduced to a certain extent,
It cannot reach the standard grade and use for the sake of security.The setting of the residual thickness of safety is mainly according to execute-in-place and bleed-out accident number at present
The general residual thick specified value obtained according to analysis.
During ladle use, when particularly ladle holds molten steel, ladle is detected currently without effective monitoring means
The residual thickness of reality of working lining 4, even pour steel finish the ladle returned later can not due to the cold steel of bonding and slag
Accurately judge its practical residual thickness.
Currently known means are mainly that the experience accumulation of operating personnel and range estimation is leaned on to be judged that part of the manufacturer also passes through
1 temperature reference of box hat is analyzed.Since each region actual (real) thickness of ladle is originally uneven simultaneously at high operating temperatures, work is accurately sentenced
The residual thickness of layer 4 has certain difficulty, and even if experienced operator is to different ladle condition adjudgement errors not necessarily, general error exists
Between 25~50mm.Therefore, every year due to erroneous judgement causes the accident or the residual thick judgement of ladle is inaccurate and it is offline in advance caused by damage
Mistake is very big, and some even meeting bleed-outs cause serious accident, so there is an urgent need to a kind of simple possible and effective sides
Method carrys out the residual thickness of the resistance to material of the online ladle of accurate judgement, it is ensured that ladle safety.
In the prior art, document " application of 300t ladle wall working linings maintenance technology " is pointed out to judge steel ladle working layer in the past
The residual thickness of prefabricated section relies primarily on operating personnel and judges according to working experience, there is larger uncertain factor, may have erroneous judgement,
The situation of misjudgement determines repair scheme according to the data after erroneous judgement, misjudgement, and there are ladles to repair generation hidden danger of quality not in place
Or repairing is overly conservative, the phenomenon that causing to waste resistance to material.Afterwards by observing offline ladle, it is believed that residual face width and residual
There are certain proportionate relationships for brick thickness.According to this proportionate relationship, measure entire prefabricated section thinnest part refractory brick width it
Afterwards, it is possible to determine that the thickness of residual brick at this eliminates ladle use quality security risk, while also resistance to material can be avoided to build waste by laying bricks or stones.
But this method must be offline ladle application, it is necessary to it is artificial to judge, and to be often ladle hold the upper of molten steel to safety accident
Occur in line application process, still there is limitation in institute in this way.
In addition, " application of the laser thickness gauge on Baosteel 300t ladles " document also provide it is a kind of survey steel ladle working layer it is residual
Method afterwards：First using laser thickness gauge scanning survey working lining, obtain new job contract and make layer thickness, then use one in ladle
After the section time, using the measurement of laser thickness gauge, by with use before each position thickness of resistance to material comparison, ladle can be understood
The resistance to material situation of liner.But this article also indicates that simultaneously：Before being fixed on a swivel angle plate due to laser thickness gauge, it can only measure and be put into
The offline ladle of the swivel angle plate, and ladle is put into the swivel angle plate and is influenced by ladle trolley, driving and production logistics, it is fixed
There is certain limitation in the use of formula laser thickness gauge at the scene.In addition dry slag phenomenon is more serious in use for ladle,
Since calibrator measurement is to be projected and received time difference between the light being reflected back using laser come calculated thickness, so
When chance cylinder-packing dry slag is thicker, all measurement can be made some blind areas occur, make measurement not comprehensive enough.Key is that laser measurement cannot be distinguished
Slag steel or resistance to material, dry slag makes the thickness of not only refractory material that measurement result is shown, so as to actually residual to refractory material
Thick judgement affects, these factors all will have certain influence to ladle thickness measurement with laser accuracy.
Patent CN203024696U " a kind of residual thick survey tool of ladle wall refractory material ", which is described, utilizes operating lever, axis
The residual thickness of the resistance to material of containment wall is measured to tool combinations such as measuring appliance, inner wall mandrils, is artificial directly measurement after the offline cooling of ladle.Patent
CN203240996U " a kind of residual thick measuring appliance immediately of main trough of blast furnace furrow bank refractory material ", which is also described, utilizes measuring appliance, rotation
Casing, stent, the residual thickness approach of the resistance to material of tool manual measurement of protractor and resistance to material serve as a contrast artificial directly measurement after offline cooling
Method.
Invention content
The problem of on-line measurement ladle is residual thick safely, mesh of the invention are difficult to for the prior art in the prior art
Be to provide online ladle residual thick marker method safely.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of ladle, each layer from outside to inside include：Box hat, permanent layer and insulating layer, mark flame retardant coating, working lining,
Contain the mark element for being melted in molten steel in mark flame retardant coating.
An embodiment according to the present invention, mark flame retardant coating are refractory brick, and the selection range of refractory brick includes agalmatolite brick, height
Aluminium brick, clay brick.
An embodiment according to the present invention adds in barium monoxide in refractory brick as mark element.
An embodiment according to the present invention, the content of barium monoxide is 2%~5%.
An embodiment according to the present invention, the thickness of refractory brick is 20~40mm.
To achieve the above object, the present invention also adopts the following technical scheme that：
A kind of online ladle residual thick marker method safely, including：Step 1, the ladle with mark flame retardant coating, ladle are made
Each layer is followed successively by box hat, permanent layer and insulating layer, mark flame retardant coating, working lining from outside to inside, and indicates in flame retardant coating containing molten
Solution is in the mark element of molten steel；Step 2, the content of analysis mark element；Step 3, judge to indicate whether constituent content increases extremely
Add, so as to determine whether ladle needs to repair.
An embodiment according to the present invention, step 2 further comprise：Step 2.1, mark member is obtained by steel sample and slag specimen
The content data of element；Step 2.2, it collects ladle and is contrasted curve using mark constituent content data early period；Step 2.3, will
Current detection data are compared with correlation curve data.
In the above-mentioned technical solutions, residual thick marker method and corresponding ladle can be effective safely for online ladle of the invention
The safe condition of the steel ladle working layer when holding molten steel is monitored, ladle bleed-out is made and is given warning in advance, and can greatly reduce steel
Packet bleed-out accident occurs, and avoids serious accident, while can reduce since experience and ladle liner specific environment difference are drawn
The erroneous judgement risen reduces the ladle ratio offline in advance due to erroneous judgement, saves refractory consumption, reduces production cost.
Description of the drawings
Fig. 1 is the structure diagram of ladle in the prior art；
Fig. 2 is the ladle structure diagram of the present invention；
Fig. 3 is the flow chart of ladle of the invention online residual thick marker method safely；
Fig. 4-7 is the mark element monitoring curve synoptic diagram in each embodiment respectively.
Specific embodiment
The technical solution further illustrated the present invention with reference to the accompanying drawings and examples.
With reference to Fig. 2, core thinking of the invention is that addition tracer height melts oxidation in the refractory material of mark residual thickness
Object indicates the actual (real) thickness of ladle lining, when ladle uses required mark by the use of the molten oxide of height as indicator
During residual thick value, the oxide in the resistance to material of remaining, which melts, enters molten steel, by detect the fluctuation of molten steel oxidation object ion concentration and then
Achieve the purpose that monitor the residual thickness of ladle lining.
Therefore, according to above-mentioned core thinking, each layer from outside to inside of ladle of the present invention includes：Box hat 1, permanent layer and
Insulating layer 2, mark flame retardant coating 3, working lining 4, mark flame retardant coating 3 is interior to contain the mark element for being melted in molten steel.
Specifically, the present invention sets one layer of mark refractory brick between steel ladle working layer 4 and permanent layer, can be alabaster
Brick, high-alumina brick, clay brick any one, brick builds thickness by laying bricks or stones as 20~40mm.Indicate refractory brick make in add in 2%~
5% barium monoxide makes barium monoxide can be uniformly distributed in inside refractory brick.It is also laid with before the construction of ladle bottom working lining 4
One layer of mark refractory brick.The working lining 4 for monitoring residual thickness is entirely needed to be covered with the mark refractory brick containing barium monoxide below in this way.
As shown in figure 3, using above-mentioned ladle, residual thick marker method mainly includes online ladle of the invention safely：
Step S1, make with mark flame retardant coating 3 ladle, ladle from outside to inside each layer be followed successively by box hat 1, permanent layer and
Insulating layer 2, mark flame retardant coating 3, working lining 4, and indicate in flame retardant coating 3 containing the mark element for being melted in molten steel.
Step S2 obtains the content data of mark element by steel sample and slag specimen.
Step S3 collects ladle and is contrasted curve using mark constituent content data early period.
Step S4 compares current detection data and correlation curve data.
Step S5 judges to indicate whether constituent content increases extremely, so as to determine whether ladle needs to repair.
Summarize above-mentioned steps, increase the detection content of barium element in steel mill steel sample analysis content, in the steel made
It wraps and barium concentration of element data in steel sample is collected after line uses as basic data, when ladle is using to a certain extent, molten steel
When touching the refractory brick containing barium monoxide, the barium element in tracer refractory brick enters molten steel.At this moment no matter ladle is in that work
Position as long as showing the unusual fluctuations of barium concentration of element and rising in analysis sample, illustrates that steel ladle working layer 4 has had part to use
Finish (as shown in Figure 4), ladle needs emphasis to check attack sites and the offline repairing after steel is poured.
Above structure and method are further illustrated below by multiple embodiments.
Embodiment 1
The agalmatolite brick containing barium monoxide 2%, thickness 40mm are made, while the entire permanent ladle layer 40mm of resistance to material is thinned, it is complete
Into ladle building construction, use of reaching the standard grade.Every stove all detects the barium constituent content in molten steel and slag specimen in use, with background statistical number
According to comparison, mark element monitoring data curve graph shown in fig. 5 is obtained, if mark constituent content increases extremely, under ladle
Line is repaired.
Fig. 5 fundamental curves show that barium element fluctuates between 1~6ppm, and in 85 stove, barium element increases suddenly in molten steel
To 23ppm, ladle descends ray examination at once, it is found that slag lining has abnormal erosion, carry out the position repairing immediately.
Embodiment 2
The clay brick containing barium monoxide 5%, thickness 20mm are made, while the entire permanent ladle layer 20mm of resistance to material is thinned, it is complete
Into ladle building construction, use of reaching the standard grade.Every stove all detects the barium constituent content in molten steel and slag specimen in use, with background statistical number
According to comparison, mark element monitoring data curve graph shown in fig. 6 is obtained, if mark constituent content increases extremely, under ladle
Line is repaired.
Fig. 6 fundamental curves show that barium element fluctuates between 2~10ppm, and in 75 stove, barium element rises suddenly in molten steel
Up to 27ppm, ladle descend ray examination at once, find the position abnormal erosion of bottom impact area, carry out the position repairing immediately.
Embodiment 3
The agalmatolite brick containing barium monoxide 3.5%, thickness 30mm are made, while the entire permanent ladle layer 35mm of resistance to material is thinned,
Complete ladle building construction, use of reaching the standard grade.Every stove all detects the barium constituent content in molten steel and slag specimen in use, is counted with background
Data comparison obtains mark element monitoring data curve graph shown in Fig. 7, if mark constituent content increases extremely, ladle
Offline repairing.
Fig. 7 fundamental curves show that barium element fluctuates between 3~9ppm, and in 90 stove, barium element increases suddenly in molten steel
To 29ppm, ladle descends ray examination at once, finds slag lining abnormal erosion under containment wall, carries out the position repairing immediately.
In conclusion the present invention can effectively monitor the safe condition of the steel ladle working layer when holding molten steel, for ladle
Bleed-out, which is made, gives warning in advance and can greatly reduce the generation of ladle bleed-out accident.It can be reduced simultaneously due to experience and ladle liner tool
It is judged by accident caused by body environment is different, reduces the ladle ratio offline in advance due to erroneous judgement, save refractory consumption, reduction is produced into
This.Be also applied for the refractory materials working lining such as ladle, slag filling, RH refining furnaces, LF refining furnace safely the judgement of residual thickness with should
With this technology practicing system is few, method simple practical, accurate and effective.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification will be all fallen in the range of claims of the present invention.
Claims (2)
1. a kind of online ladle residual thick marker method safely, which is characterized in that including：
Step 1, the ladle with mark flame retardant coating is made, each layer is followed successively by box hat, permanent layer and guarantor to the ladle from outside to inside
Warm layer, mark flame retardant coating, working lining, the mark flame retardant coating refer in flame retardant coating containing the mark member that can be melted in molten steel
Element；
Step 2, the content of analysis mark element；
Step 3, judge to indicate whether constituent content increases extremely, so as to determine whether ladle needs to repair.
2. ladle as described in claim 1 online residual thick marker method safely, which is characterized in that step 2 further comprises：
Step 2.1, the content data of mark element is obtained by steel sample and slag specimen；
Step 2.2, it collects ladle and is contrasted curve using mark constituent content data early period；
Step 2.3, current detection data and correlation curve data are compared.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510350654.1A CN106312032B (en) | 2015-06-23 | 2015-06-23 | Online ladle residual thick marker method safely |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510350654.1A CN106312032B (en) | 2015-06-23 | 2015-06-23 | Online ladle residual thick marker method safely |
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| CN106312032A CN106312032A (en) | 2017-01-11 |
| CN106312032B true CN106312032B (en) | 2018-07-06 |
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| CN112792329A (en) * | 2021-02-01 | 2021-05-14 | 北京利尔高温材料股份有限公司 | A warning brick for working lining of tundish and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372473A (en) * | 1986-09-12 | 1988-04-02 | Sumitomo Metal Ind Ltd | Lining method for molten steel ladle |
| CN2818014Y (en) * | 2005-08-24 | 2006-09-20 | 崔东瑞 | Structure of steel ladle inner lining |
| CN101380674A (en) * | 2008-10-06 | 2009-03-11 | 中冶宝钢技术服务有限公司 | Ladle wall permanent layer repairing method |
| CN102303101A (en) * | 2011-09-05 | 2012-01-04 | 山西太钢不锈钢股份有限公司 | Method for online measurement of bottom residual thickness of molten steel pot |
| CN103846421A (en) * | 2012-12-03 | 2014-06-11 | 武汉钢铁(集团)公司 | Combined building brick capable of judging thickness of ladle bath |
| CN204108250U (en) * | 2014-10-22 | 2015-01-21 | 武汉钢铁(集团)公司 | There is the smelting ladle of molten bath thickness on-line intelligence warning function |
| CN204220980U (en) * | 2014-11-07 | 2015-03-25 | 马鞍山市鑫海耐火材料有限责任公司 | A kind of trouble free service layer ladle liner |
-
2015
- 2015-06-23 CN CN201510350654.1A patent/CN106312032B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372473A (en) * | 1986-09-12 | 1988-04-02 | Sumitomo Metal Ind Ltd | Lining method for molten steel ladle |
| CN2818014Y (en) * | 2005-08-24 | 2006-09-20 | 崔东瑞 | Structure of steel ladle inner lining |
| CN101380674A (en) * | 2008-10-06 | 2009-03-11 | 中冶宝钢技术服务有限公司 | Ladle wall permanent layer repairing method |
| CN102303101A (en) * | 2011-09-05 | 2012-01-04 | 山西太钢不锈钢股份有限公司 | Method for online measurement of bottom residual thickness of molten steel pot |
| CN103846421A (en) * | 2012-12-03 | 2014-06-11 | 武汉钢铁(集团)公司 | Combined building brick capable of judging thickness of ladle bath |
| CN204108250U (en) * | 2014-10-22 | 2015-01-21 | 武汉钢铁(集团)公司 | There is the smelting ladle of molten bath thickness on-line intelligence warning function |
| CN204220980U (en) * | 2014-11-07 | 2015-03-25 | 马鞍山市鑫海耐火材料有限责任公司 | A kind of trouble free service layer ladle liner |
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