CN107858466A - The Forecasting Methodology of charge level depth during a kind of blast furnace level-lowering blowing out - Google Patents
The Forecasting Methodology of charge level depth during a kind of blast furnace level-lowering blowing out Download PDFInfo
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- CN107858466A CN107858466A CN201711109870.2A CN201711109870A CN107858466A CN 107858466 A CN107858466 A CN 107858466A CN 201711109870 A CN201711109870 A CN 201711109870A CN 107858466 A CN107858466 A CN 107858466A
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- charge level
- blast furnace
- level
- cooling wall
- cooling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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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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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The present invention relates to a kind of Forecasting Methodology of charge level depth during blast furnace level-lowering blowing out, in blast furnace level-lowering furnace shutting down process, the depth of charge level is prejudged by comparing the current Distribution value of circumferential temperature of cooling wall different height cooling section, and the distribution of cooling wall temperature history average temperatures.The cooling wall temperature history average value refers to that relatively current value minute goes over the average value of cooling wall temperature in (0.5~1.5) * T, and T is the blast furnace process cycle.The application has simple to operate, and data are few, it is as a result accurate the advantages that.
Description
Technical field
The present invention relates to the Forecasting Methodology of charge level depth during blast furnace level-lowering blowing out.
Background technology
Blast furnace level-lowering blowing out is the stopping production operation before blast furnace medium-capital overhauling, typically requires charge level to be reduced to air port region,
During blast furnace level-lowering blowing out, charge level depth in stove need to be judged at any time.At present, (or two kinds of known charge level depth determination methods
Or the combination of three kinds of methods) have：1st, chemical analysis, a stock gas sample chemical examination is taken per 30min, according to the change of gas composition
Change the depth for judging charge level, there is the influence of sampling, coal gas chemical examination etc. error in such a method, accuracy of judgement degree is poor, and
Operation difficulty is big；2nd, radar stock rod probe method, the blast furnace equipped with radar stock rod detect charge level depth, drop material with radar stock rod
Phase in front, can real-time detection charge level depth, but with the decline of charge level, by high temperature, dust, furnace roof is fetched water is influenceed, and radar is visited
Failure often occurs in chi, and data fluctuations are big, and the phenomenon to cut in and out often occurs, and can not realize lasting detection charge level depth；
3rd, mechanical stock rod probe method, before blast furnace level-lowering blowing out, need blowing down in advance to change and lengthen mechanical stock rod, general blast furnace level-lowering blowing out
During, the charge level of detection in every 1 hour, because furnace high-temperature easily melts stock rod chain or stock rod weight, even if reducing
Charge level depth detects the frequency, and stock rod melting loss can not complete detection of the furnace bosh with lower portion charge level depth.
The content of the invention
The technical problems to be solved by the invention are expected when being and providing a kind of blast furnace level-lowering blowing out for above-mentioned prior art
The Forecasting Methodology of face depth, have it is simple to operate, data are few, it is as a result accurate the advantages that.
Technical scheme is used by the present invention solves the above problems：Charge level depth is pre- during a kind of blast furnace level-lowering blowing out
Survey method, it is characterised in that：In blast furnace level-lowering furnace shutting down process, by the circumferential temperature for comparing cooling wall different height cooling section
Current Distribution value, and the distribution of cooling wall temperature history average temperatures are spent to prejudge the depth of charge level.
Further, the cooling wall temperature history average value refer to relatively current value minute go over (0.5~
1.5) average value of wall temperature is cooled down in * T, T is the blast furnace process cycle.
Preferably, the circumferential temperature measuring of cooling wall different height cooling section is that the thermocouple being distributed by circumferencial direction is surveyed
Go out, neighboring thermocouple spaced apart circumferential angle is 30~45 °.
The specific pre-judging method of charge level depth is, by the current radar distribution map for comparing cooling wall cooling section circumference temperature
With the radar distribution map of history average, if radar map has common factor, charge level is highly not below the cooling wall of the height, if interval
Substantially without common factor, then charge level is less than the cooling wall of the height, the position of charge level height is judged accordingly, by dividing cooling wall height
The floor height of degree direction cooling section can realize that more accurate charge level highly prejudges.
The pre- geodesic structure of charge level depth when the application provides blast furnace level-lowering blowing out in addition：It is cold more than along blast-furnace tuyere section
But the continuous some cooling sections of wall division, each cooling section are evenly arranged thermocouple along blast furnace circumferencial direction, between neighboring thermocouple
It it is 30~45 ° every circumferential angle, the temperature measured according to thermocouple draws current temperature value radar distribution map and history average
Radar distribution map, so as to produce the reference icon of charge level depth prediction.
The application is included in blast furnace level-lowering furnace shutting down process, by comparing cooling wall temperature currency and cooling wall temperature
History average prejudges the depth of charge level.Specifically, the cooling wall thermocouple is measurement cooling wall wall body temperature, along blast furnace
Short transverse, more than air port section every section is distributed with cooling wall thermocouple, along blast furnace circumferencial direction, is spaced 30~45 ° of distributed heats
Galvanic couple, cool down wall temperature currency and cooling wall temperature history average value is by every section and circumferencial direction is made but is not limited to radar
Figure, in blast furnace level-lowering furnace shutting down process, when cooling wall temperature currency curve exceeds cooling wall temperature history average value curve
When, charge level has reached the position of this section of thermocouple, according to the i.e. predictable charge level depth in the position of thermocouple.
Compared with prior art, the advantage of the invention is that：
1st, stability is good, and not by coal gas of high temperature, dust, furnace roof is fetched water is influenceed；
2nd, implement simply, conveniently；
3rd, furnace bosh is effectively completed with the judgement of lower portion charge level depth.
Brief description of the drawings
Fig. 1 is blast furnace charge level and cooling wall thermocouple distribution schematic diagram；
Fig. 2 be charge level more than certain section of cooling wall thermocouple location when Temperature Distribution schematic diagram；
Fig. 3 is Temperature Distribution schematic diagram when charge level reaches certain section of cooling wall thermocouple location.
1 is blast-furnace tuyere center line in Fig. 1, and 2 be charge level, and 3 be blast-furnace body, and 4 be cooling wall thermocouple, and 5 be 5 sections of coolings
Wall, 6 be 6 sections of cooling walls, and 7 be 7 sections of cooling walls, and 8 be 8 sections of cooling walls, and 9 be 9 sections of cooling walls, and 10 be 10 sections of cooling walls, and 11 be 11
Section cooling wall, 12 be 12 sections of cooling walls, and 13 be 13 sections of cooling walls, and 14 be 14 sections of cooling walls, and 15 be 15 sections of cooling walls, and 16 be 16 sections
Cooling wall.
Embodiment
The present invention is described in further detail with reference to embodiments.
As shown in figure 1, in the present embodiment, when starting level-lowering, charge level is 16 sections of cooling wall positions, and cooling wall thermocouple is all
Below charge level, coal gas of high temperature heat partial conductance is taken away to cooling wall by cooling water caused by blast-furnace tuyere, part and furnace charge
Heat exchange is carried out, some takes blast furnace out of by coal gas, and now, the temperature of cooling wall is because of the presence of furnace charge, by edge gas
The influence of stream, Temperature Distribution is as shown in Fig. 2 cooling wall temperature currency curve exists with cooling wall temperature history average value curve
Crossover phenomenon.With the decline of charge level, cooling wall more than charge level is directly exposed among coal gas, and coal gas of high temperature is conducted to cooling
The heat increase of wall, cause to cool down wall temperature rising, as shown in figure 3, Fig. 3 is 6 sections of cooling wall Temperature Distribution schematic diagrames, work as appearance
When cooling wall temperature currency curve exceeds cooling wall temperature history average value curve, you can judge that charge level has reached 6 sections of coolings
Wall thermocouple position on the lower side.
As shown in figure 1, when the application provides blast furnace level-lowering blowing out in addition charge level depth pre- geodesic structure：Along blast-furnace tuyere
Cooling wall more than section divides continuous some cooling sections, has 16 sections in figure, each cooling section is evenly arranged along blast furnace circumferencial direction
Thermocouple, the spaced apart circumferential angle of neighboring thermocouple is 30~45 °, and the temperature so as to be measured according to thermocouple draws current temperature
Angle value radar distribution map and history average radar distribution map, so as to produce the reference icon of charge level depth prediction.
The application judges charge level height, letter without direct measurement charge level depth according to the temperature change of cooling wall
Change manual operation, and predict accurately.
In addition to the implementation, it is all to use equivalent transformation or equivalent replacement present invention additionally comprises there is other embodiment
The technical scheme that mode is formed, it all should fall within the scope of the hereto appended claims.
Claims (5)
- A kind of 1. Forecasting Methodology of charge level depth during blast furnace level-lowering blowing out, it is characterised in that：In blast furnace level-lowering furnace shutting down process In, by comparing the current Distribution value of circumferential temperature of cooling wall different height cooling section, and cooling wall temperature history average value temperature Degree is distributed to prejudge the depth of charge level.
- 2. the Forecasting Methodology of charge level depth during blast furnace level-lowering blowing out according to claim 1, it is characterised in that：It is described cold But wall temperature history average refers to that relatively current value minute goes over the average value of cooling wall temperature in (0.5~1.5) * T, T is the blast furnace process cycle.
- 3. the Forecasting Methodology of charge level depth during blast furnace level-lowering blowing out according to claim 1, it is characterised in that：Cooling wall The circumferential temperature measuring of different height cooling section is that the thermocouple being distributed by circumferencial direction is measured, neighboring thermocouple interval circle All angles are 30~45 °.
- 4. the Forecasting Methodology of charge level depth during blast furnace level-lowering blowing out according to claim 1, it is characterised in that：Charge level is deep The specific pre-judging method of degree is, by the current radar distribution map and history average that compare cooling wall cooling section circumference temperature Radar distribution map, if radar map has common factor, charge level is highly not below the cooling wall of the height, if interval substantially without common factor, Charge level is less than the cooling wall of the height, the position of charge level height is judged accordingly, by dividing cooling wall short transverse cooling section Floor height can realize that more accurate charge level highly prejudges.
- A kind of 5. pre- geodesic structure of charge level depth during blast furnace level-lowering blowing out, it is characterised in that：It is cold more than along blast-furnace tuyere section But the continuous some cooling sections of wall division, each cooling section are evenly arranged thermocouple along blast furnace circumferencial direction, between neighboring thermocouple It it is 30~45 ° every circumferential angle, the temperature measured according to thermocouple draws current temperature value radar distribution map and history average Radar distribution map, so as to produce the reference icon of charge level depth prediction.
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| CN201711109870.2A CN107858466B (en) | 2017-11-11 | 2017-11-11 | Method for predicting charge level depth of blast furnace during charge level lowering and blowing out |
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| CN201711109870.2A CN107858466B (en) | 2017-11-11 | 2017-11-11 | Method for predicting charge level depth of blast furnace during charge level lowering and blowing out |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842015A (en) * | 2018-07-26 | 2018-11-20 | 山西太钢不锈钢股份有限公司 | A method of judging charge level position in the furnace of blast furnace |
| CN115044719A (en) * | 2022-06-13 | 2022-09-13 | 武汉钢铁有限公司 | Method for judging charge level position by lowering charge level and damping down |
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| JPS5956507A (en) * | 1982-09-27 | 1984-04-02 | Sumitomo Metal Ind Ltd | Method for estimating position of measuring sonde in blast furnace |
| CN101613778A (en) * | 2009-07-14 | 2009-12-30 | 中南大学 | The intelligent extract method of edge temperature of blast furnace charge level temperature field |
| CN101696458A (en) * | 2009-10-14 | 2010-04-21 | 首钢总公司 | Method for quantitative stock level-lowering and blowing out of blast furnace |
| CN102337361A (en) * | 2011-10-13 | 2012-02-01 | 山西太钢不锈钢股份有限公司 | Method for positioning discharged residual iron during overhaul of blast furnace |
| CN102676718A (en) * | 2011-03-07 | 2012-09-19 | 宝山钢铁股份有限公司 | System and method for alarming blast-furnace burden surface states |
| CN102925606A (en) * | 2012-11-30 | 2013-02-13 | 攀钢集团成都钢钒有限公司 | Forecasting method for descending depth of material surface of blast furnace during furnace shutting down |
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2017
- 2017-11-11 CN CN201711109870.2A patent/CN107858466B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5956507A (en) * | 1982-09-27 | 1984-04-02 | Sumitomo Metal Ind Ltd | Method for estimating position of measuring sonde in blast furnace |
| CN101613778A (en) * | 2009-07-14 | 2009-12-30 | 中南大学 | The intelligent extract method of edge temperature of blast furnace charge level temperature field |
| CN101696458A (en) * | 2009-10-14 | 2010-04-21 | 首钢总公司 | Method for quantitative stock level-lowering and blowing out of blast furnace |
| CN102676718A (en) * | 2011-03-07 | 2012-09-19 | 宝山钢铁股份有限公司 | System and method for alarming blast-furnace burden surface states |
| CN102337361A (en) * | 2011-10-13 | 2012-02-01 | 山西太钢不锈钢股份有限公司 | Method for positioning discharged residual iron during overhaul of blast furnace |
| CN102925606A (en) * | 2012-11-30 | 2013-02-13 | 攀钢集团成都钢钒有限公司 | Forecasting method for descending depth of material surface of blast furnace during furnace shutting down |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842015A (en) * | 2018-07-26 | 2018-11-20 | 山西太钢不锈钢股份有限公司 | A method of judging charge level position in the furnace of blast furnace |
| CN108842015B (en) * | 2018-07-26 | 2020-06-30 | 山西太钢不锈钢股份有限公司 | Method for judging position of charge level in blast furnace |
| CN115044719A (en) * | 2022-06-13 | 2022-09-13 | 武汉钢铁有限公司 | Method for judging charge level position by lowering charge level and damping down |
| CN115044719B (en) * | 2022-06-13 | 2023-09-22 | 武汉钢铁有限公司 | Method for judging material level position by reducing material level damping down |
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| CN107858466B (en) | 2019-12-27 |
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