CN108060281A - A kind of method of blast furnace drop furnace temperature - Google Patents
A kind of method of blast furnace drop furnace temperature Download PDFInfo
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- CN108060281A CN108060281A CN201711258262.8A CN201711258262A CN108060281A CN 108060281 A CN108060281 A CN 108060281A CN 201711258262 A CN201711258262 A CN 201711258262A CN 108060281 A CN108060281 A CN 108060281A
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- furnace temperature
- fuel ratio
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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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- Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The present invention relates to a kind of blast furnace drop furnace temperature method, it include it is following successively the step of：I reduces furnace temperature when furnace temperature is greater than or equal to 0.70%, and 4 ~ 6kg of fuel ratio drop furnace temperature was reduced according to every four hours；For II control furnace temperature when scope of the furnace temperature 0.55% ~ 0.69%, taking reduces by 4 ~ 6kg for first four hours, the method reduction furnace temperature of latter four hours small size 2 ~ 3kg of readjustment；III determines that fuel ratio when 0.45% ± 0.05% liang of heat occurs in furnace temperature, then takes preceding 8 hourly average fuel ratio as the fuel ratio controlled when smelting.The method of the blast furnace drop furnace temperature of the present invention, reduces iron-smelting fuel consumption, reduces ironmaking cost.
Description
Technical field
The present invention relates to a kind of methods of blast furnace drop furnace temperature.
Background technology
Furnace temperature refers to the mass percent of silicon content of hot metal in blast furnace ironmaking.The height of silicon content of hot metal is disappeared again with blast furnace
The fuel ratio of consumption（The dry amount of coke of one ton of iron consumption of smelting and kilogram number of the sum of coal dust amount）Correlation, so, drop
Furnace temperature can reduce fuel consumption again.For blast furnace operating person, drop furnace temperature operation is a kind of operation common in blast furnace operating.
But the not science of the method due to reducing furnace temperature, it will usually two kinds of situations occur, first, too conservative during drop furnace temperature, furnace temperature
Prescribed limit is not achieved for a long time；Second is that too advancing rashly when reducing furnace temperature, furnace temperature is interior in short-term to be brought down below normal lower control limit level,
Then there is the process for putting forward furnace temperature again, What is more occurs controlling furnace temperature too low during drop furnace temperature, slide rule, hanging, cupola well occurs and freezes
Phenomena such as knot, brings serious harm to blast fumance, and improves iron-smelting fuel consumption, adds ironmaking cost.
The content of the invention
In order to overcome the above-mentioned deficiency of the method for existing blast furnace drop furnace temperature, the present invention provides a kind of blast furnace drop furnace temperature of stabilization
Method, and reduce iron-smelting fuel consumption, reduce ironmaking cost.
Idea of the invention is that it is influenced for furnace temperature during blast furnace ironmaking by many factors.Fuel ratio is wherein weight
Maximum factor, so during furnace temperature is reduced, often to reduce fuel ratio as main regulating measure.But shadow
The factor for ringing furnace temperature is not only fuel ratio, and other numerous factors, which are combined, can make blast furnace operating become complicated, if simple
Singlely adjustment fuel ratio is removed according to the correspondence of fuel ratio and silicon content of hot metal, then other factors will show no small
Effect so that simply according to fuel ratio operating blast furnaces is gone out-of-control phenomenon occur, i.e. actual furnace temperature will be less than according to fuel ratio pair
The furnace temperature answered, here it is the thermal inertia problem described in blast furnace operating, but these factors, and can not go to weigh with exact amount,
So this method is exactly than the side with a kind of other vertical multifactor rear stabilizations proposed, quick reduction furnace temperature in trade-off fuel
Method.The present invention proposes：When furnace temperature distance objective control range farther out when, can be simply corresponding according to furnace temperature and the relation of fuel ratio
The control of fuel ratio is carried out, to be taken when close to target control scope reduces fuel ratio and the slightly way of readjustment fuel ratio,
Stablize, is quick, the accurate oven temperature ranges for reaching actual requirement.It must reach the progress of target furnace temperature that drop fuel ratio in the latter, which is,
Action, slightly adjust back fuel ratio in order that overcoming the operation that occurs thermal inertia during furnace temperature is dropped and carry out.When continuous
When the furnace temperature of target control furnace temperature center line ± 0.05% occur in two heats, then it is believed that furnace temperature reaches control range.But fuel
Than it is selected than take preceding 8 small hourly values because current furnace temperature be not only nearest 4 it is small when fuel ratio effect as a result, also with
It is preceding 4 ~ 8 it is small when fuel ratio effect it is related.
The control range of this blast furnace low silicon smelting furnace temperature（Generally 0.35% ~ 0.55%）And it is designed.
This blast furnace drop furnace temperature method include it is following successively the step of：
It include it is following successively the step of：
I reduces furnace temperature
When furnace temperature is greater than or equal to 0.70%, 4 ~ 6kg of fuel ratio drop furnace temperature was reduced according to every four hours；When furnace temperature is more than or equal to
When more than 0.70%, it is to reduce fuel ratio 5kg according to every four hours to drop the measure taken during furnace temperature（During blast furnace ironmaking, at other
When part is constant, fuel ratio and the correspondence of furnace temperature are the fuel ratios of the every 0.1% corresponding 5kg of silicon content of hot metal, and fuel ratio
It is the principal element for influencing silicon content of hot metal, but and not all factor）Rhythm drop furnace temperature.
II control furnace temperature
When scope of the furnace temperature 0.55% ~ 0.69%, taking reduces by 4 ~ 6kg for first four hours, latter four hours small size 2 ~ 3kg of readjustment
Method reduces furnace temperature.
III determines fuel ratio
When 0.45% ± 0.05% liang of heat occurs in furnace temperature, then preceding 8 hourly average fuel ratio is taken as the fuel controlled when smelting
Than.
Beneficial effects of the present invention
1. it is too slow to put fuel ratio during solving the problems, such as drop furnace temperature.The present invention gives the stoves that can continuously reduce fuel ratio
Warm scope.
2. it is too fast to put fuel ratio during solving the problems, such as drop furnace temperature.The present invention gives fuel ratios during drop furnace temperature
There are the oven temperature ranges and concrete operation method of readjustment in drop.
3. avoid put furnace temperature it is too slow either too fast and caused by long-term furnace temperature it is too high or caused since furnace temperature is too low
Slide rule, hanging notably gobbed up phenomenon, so as to cause the rise of ironmaking cost.
Specific embodiment
The specific embodiment of the present invention is further illustrated with reference to embodiment.For the explanation of the following examples
Help to understand the present invention, but be not limitation of the present invention.
Embodiment
This blast furnace drop furnace temperature method include it is following successively the step of：
I reduces furnace temperature
Four hours fuel ratios are 511kg after night shift one day, and four hours furnace temperature are higher before day shift, in 0.90%~0.97% scope,
The oven temperature ranges are more than or equal to 0.7%；Therefore before day shift 4 it is small when fuel ratio controlled according to 6kg is reduced, in the work of 505kg fuel ratios
With lower smelting, four hours furnace temperature progress into 0.84% ~ 0.88% after class, still greater than 0.7%；Then four hours fuel ratios after day shift
Continue to reduce 5kg, be controlled according to 500kg, two classes early period furnace temperature progress into 0.65% ~ 0.69%, furnace temperature is less than 0.7%；
II control furnace temperature
Therefore four hours fuel ratios reduce 5kg again before two classes, are controlled according to 495kg, four hours furnace temperature progress into 0.56% after two classes
~ 0.59% scope, four hours fuel ratios do not continue to reduce after two classes, but adjust back 2kg, are controlled according to 497kg；Second day and night
Four hours furnace temperature progress into 0.45% ~ 0.50% before class, and fuel ratio is according to reduction 4kg（493kg）Control, and furnace temperature enters
0.45% ± 0.05% liang of heat.
III determines fuel ratio
Therefore after night shift four hours according to preceding 8 small hourly values（495kg）It is controlled, subsequent furnace temperature reaches normal control center line water
It is flat, the control range to blast furnace low silicon smelting furnace temperature is maintained, is 0.35% ~ 0.55%.
Claims (1)
1. a kind of method of blast furnace drop furnace temperature, it include it is following successively the step of：
I reduces furnace temperature
When furnace temperature is greater than or equal to 0.70%, 4 ~ 6kg of fuel ratio drop furnace temperature was reduced according to every four hours；
II control furnace temperature
When scope of the furnace temperature 0.55% ~ 0.69%, taking reduces by 4 ~ 6kg for first four hours, latter four hours small size 2 ~ 3kg of readjustment
Method reduces furnace temperature；
III determines fuel ratio
When 0.45% ± 0.05% liang of heat occurs in furnace temperature, then preceding 8 hourly average fuel ratio is taken as the fuel controlled when smelting
Than.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711258262.8A CN108060281B (en) | 2017-12-04 | 2017-12-04 | A kind of method of blast furnace drop furnace temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711258262.8A CN108060281B (en) | 2017-12-04 | 2017-12-04 | A kind of method of blast furnace drop furnace temperature |
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| Publication Number | Publication Date |
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| CN108060281A true CN108060281A (en) | 2018-05-22 |
| CN108060281B CN108060281B (en) | 2019-08-23 |
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| CN201711258262.8A Active CN108060281B (en) | 2017-12-04 | 2017-12-04 | A kind of method of blast furnace drop furnace temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112906196A (en) * | 2021-01-21 | 2021-06-04 | 山西太钢不锈钢股份有限公司 | Method for determining reasonable range of fuel ratio of blast furnace |
| CN115185250A (en) * | 2022-09-09 | 2022-10-14 | 北京智冶互联科技有限公司 | Method for controlling fuel ratio in production process of ferrous metallurgy blast furnace |
Citations (4)
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|---|---|---|---|---|
| CN101581939A (en) * | 2009-05-31 | 2009-11-18 | 济钢集团有限公司 | Method and system for monitoring fuel ratio of blast furnace in real time |
| CN102899431A (en) * | 2012-10-23 | 2013-01-30 | 秦皇岛首秦金属材料有限公司 | Method for quantitatively recovering abnormal furnace condition of blast furnace |
| CN105886680A (en) * | 2016-05-11 | 2016-08-24 | 东北大学 | System and method for dynamical soft measurement of molten iron silicon content in blast furnace ironmaking process |
| CN107119156A (en) * | 2017-04-22 | 2017-09-01 | 新兴铸管股份有限公司 | A kind of method for improving blast furnace top gas temperature |
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2017
- 2017-12-04 CN CN201711258262.8A patent/CN108060281B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581939A (en) * | 2009-05-31 | 2009-11-18 | 济钢集团有限公司 | Method and system for monitoring fuel ratio of blast furnace in real time |
| CN102899431A (en) * | 2012-10-23 | 2013-01-30 | 秦皇岛首秦金属材料有限公司 | Method for quantitatively recovering abnormal furnace condition of blast furnace |
| CN105886680A (en) * | 2016-05-11 | 2016-08-24 | 东北大学 | System and method for dynamical soft measurement of molten iron silicon content in blast furnace ironmaking process |
| CN107119156A (en) * | 2017-04-22 | 2017-09-01 | 新兴铸管股份有限公司 | A kind of method for improving blast furnace top gas temperature |
Non-Patent Citations (2)
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| 朱仁良 等: "《宝钢大型高炉操作与管理》", 30 September 2015, 冶金工业出版社 * |
| 温继勇: "《高炉主要操作参数与铁水含硅量滞后关系分析》", 《甘肃科技》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112906196A (en) * | 2021-01-21 | 2021-06-04 | 山西太钢不锈钢股份有限公司 | Method for determining reasonable range of fuel ratio of blast furnace |
| CN112906196B (en) * | 2021-01-21 | 2023-03-14 | 山西太钢不锈钢股份有限公司 | Method for determining reasonable range of fuel ratio of blast furnace |
| CN115185250A (en) * | 2022-09-09 | 2022-10-14 | 北京智冶互联科技有限公司 | Method for controlling fuel ratio in production process of ferrous metallurgy blast furnace |
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| CN108060281B (en) | 2019-08-23 |
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