CN116662711A - Method for improving hit rate of automatic steelmaking - Google Patents
Method for improving hit rate of automatic steelmaking Download PDFInfo
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- CN116662711A CN116662711A CN202310454804.8A CN202310454804A CN116662711A CN 116662711 A CN116662711 A CN 116662711A CN 202310454804 A CN202310454804 A CN 202310454804A CN 116662711 A CN116662711 A CN 116662711A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000009628 steelmaking Methods 0.000 title claims abstract description 27
- 238000007664 blowing Methods 0.000 claims abstract description 24
- 230000002159 abnormal effect Effects 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims description 18
- 238000004364 calculation method Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 abstract description 35
- 239000010959 steel Substances 0.000 abstract description 35
- 238000012821 model calculation Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000003723 Smelting Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910000677 High-carbon steel Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000004540 process dynamic Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
- G07C3/005—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles during manufacturing process
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Organic Chemistry (AREA)
- Computational Mathematics (AREA)
- Algebra (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Metallurgy (AREA)
- Pure & Applied Mathematics (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a method for improving hit rate of automatic steelmaking, belonging to the technical field of ferrous metallurgy methods. The technical scheme of the invention is as follows: and collecting abnormal factor parameters including converter waiting time, bottom blowing strength and whether the converter shakes, calculating a molten steel temperature change value according to different waiting times, and timely collecting relevant information to be incorporated into model calculation. The beneficial effects of the invention are as follows: the automatic steelmaking process can be completely carried out, and the continuous improvement of the hit rate of the end point is promoted; the method can solve the problem of large model calculation and actual deviation after the converter waits due to abnormal factors, can be applied to the steelmaking process in a large scale, is simple and convenient to operate and stable in effect, and improves the quality, social benefit and economic benefit of products.
Description
Technical Field
The invention relates to a method for improving hit rate of automatic steelmaking, belonging to the technical field of ferrous metallurgy methods.
Background
With the continuous progress of steel making technology, automatic steel making is becoming one of the important marks for measuring the development level of steel enterprises. The current domestic popular automatic steelmaking mode is a dynamic and static model, wherein the static part is calculated by utilizing the whole hot oxygen balance of a converter according to relevant information such as the requirements of molten iron, scrap steel, raw and auxiliary materials or temperatures and end point components of different steel types, the process parameters such as oxygen content consumed by blowing and blowing time are calculated, after the static control of the first stage is completed, the hit condition of the molten steel temperature and the components is actually measured by utilizing a sublance or a projectile throwing mode, and then secondary calculation is carried out according to the actual measurement and calculation gap, the end point requirements and the like, namely so-called dynamic control, and finally the hit of the end point components and the temperature is realized. However, in the actual operation process, the hit rate of the automatic steelmaking end point is not high, especially the hit rate of the temperature. The factors such as production organization, equipment failure and the like which cause the converter to wait or interrupt converting are important reasons for larger deviation between model calculation and actual results.
Patent CN202110246617.1 provides a method and a device for dynamically controlling the whole blowing process of a converter, and patent CN202110200880.7 provides an unmanned intelligent steelmaking system and a steelmaking method. The two patents are developed around automatic steelmaking and work is respectively performed from a whole-process dynamic data monitoring system and an intelligent system, but the problem of how to ensure the automatic steelmaking end point hit after the converter waits for production abnormality is not involved, so the two patents are both process control under the normal condition of automatic steelmaking and have no guiding significance on how to develop automatic steelmaking under the abnormal condition.
Disclosure of Invention
The invention aims to provide a method for improving the hit rate of automatic steelmaking, which is characterized in that various abnormal factors are comprehensively considered, the temperature change value of molten steel is calculated according to different waiting time, and relevant information is collected and incorporated into model calculation in time, so that the automatic steelmaking process can be completely carried out, and the continuous improvement of the hit rate of a terminal point is promoted; the method can solve the problems of large model calculation and actual deviation after the converter waits due to abnormal factors, can be applied to the steelmaking process in a large scale, has simple and convenient operation and stable effect, improves the quality and social and economic benefits of products, and effectively solves the problems in the background technology.
The technical scheme of the invention is as follows: a method for improving hit rate of automatic steelmaking, comprising the steps of:
(1) Collecting abnormal factor parameters, wherein the abnormal factors comprise converter waiting time, bottom blowing strength and whether a converter shakes or not;
(2) Substituting the abnormal factor parameters into a formula to calculate the temperature loss, wherein the formula is as follows:
and
wherein deltat is the unit min of the waiting time of the converter;corresponding temperature loss when the waiting time of the converter is 0 is expressed as the unit DEG C; />The unit of the temperature loss is per unit of the speed per minute when the waiting time of the converter is infinity；θ tilt The temperature loss is the unit of the temperature loss when the converter shakes; />Temperature loss caused by bottom blowing is unit per minute; τ w Is a correlation coefficient, and is in units of min;
(3) And analyzing the calculation result, wherein the deviation between the predicted temperature and the actual measured temperature is within +/-5 ℃, namely the hit is obtained, and otherwise, the deviation is regarded as a deviation target.
In the step (2), the values of the related parameters are referred as follows:
temperature loss theta during converter shaking tilt The values are referenced below: the shaking time is less than or equal to 1min, less than or equal to 2min, and exceeds the upper limit of 2 min.
Temperature loss due to bottom blowingThe values are referenced below: taking 0.2 ℃/min waiting before converting, and stopping taking 0.1 ℃/min waiting in the converting process.
The beneficial effects of the invention are as follows: by comprehensively considering various abnormal factors, calculating a molten steel temperature change value according to different waiting time, and timely collecting and incorporating relevant information into model calculation, an automatic steelmaking process can be completely carried out, and continuous improvement of a terminal hit rate is promoted; the method can solve the problem of large model calculation and actual deviation after the converter waits due to abnormal factors, can be applied to the steelmaking process in a large scale, is simple and convenient to operate and stable in effect, and improves the quality, social benefit and economic benefit of products.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are a small part of the embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of the present invention.
A method for improving hit rate of automatic steelmaking, comprising the steps of:
(1) Collecting abnormal factor parameters, wherein the abnormal factors comprise converter waiting time, bottom blowing strength and whether a converter shakes or not;
(2) Substituting the abnormal factor parameters into a formula to calculate the temperature loss, wherein the formula is as follows:
and
wherein deltat is the unit min of the waiting time of the converter;corresponding temperature loss when the waiting time of the converter is 0 is expressed as the unit DEG C; />The unit of the temperature loss is per unit of ℃/min when the waiting time of the converter is infinity; θ tilt The temperature loss is the unit of the temperature loss when the converter shakes; />Temperature loss caused by bottom blowing is unit per minute; τ w Is a correlation coefficient, and is in units of min;
(3) And analyzing the calculation result, wherein the deviation between the predicted temperature and the actual measured temperature is within +/-5 ℃, namely the hit is obtained, and otherwise, the deviation is regarded as a deviation target.
In the step (2), the values of the related parameters are referred as follows:
θ tilt ＝6.5-7.5℃，/>τ w ＝2min。
temperature loss theta during converter shaking tilt The values are referenced below: the shaking time is less than or equal to 1min, less than or equal to 2min, and exceeds the upper limit of 2 min.
Temperature loss due to bottom blowingThe values are referenced below: taking 0.2 ℃/min waiting before converting, and stopping taking 0.1 ℃/min waiting in the converting process.
Example 1
In a top-bottom combined blown converter with the nominal capacity of 120 tons, smelting low-carbon steel with the steel grade of Ml08Al, after the converter is filled with molten iron and scrap steel, 5 minutes need to wait for production plan adjustment, at the moment, the temperature of molten steel in the converter is measured to be 1350 ℃, after the actual waiting for 5 minutes, no shaking action is performed in the process, the temperature is reduced to 14.75 ℃ according to the calculation result of a formula, the actual measured temperature of molten steel is 1340 ℃, the predicted temperature value hits, and after the information is collected into a secondary system, the blowing end temperature of the converter hits.
Example 2
On a top-bottom combined blown converter with the nominal capacity of 120 tons, smelting cold heading steel with the steel grade of SWRCH22A, after the converter is filled with molten iron and scrap steel, 10 minutes need to be waited for due to production plan adjustment, at the moment, the temperature of molten steel in the converter is measured to be 1320 ℃, no shaking action is performed in the process after the actual waiting for 10 minutes, the temperature is reduced to be 20.73 ℃ according to the calculation result of a formula, the temperature of the actual measured molten steel is 1305 ℃, the predicted temperature value is hit, and after the information is collected into a secondary system, the blowing end temperature of the converter is hit.
Example 3
In a top-bottom combined blown converter with the nominal capacity of 120 tons, medium carbon steel with the steel grade of 40Cr is smelted, after the converter is filled with molten iron and scrap steel, the converter needs to wait 15 minutes due to production plan adjustment, at the moment, the temperature of molten steel in the converter is measured to be 1360 ℃, after the actual waiting for 15 minutes, no shaking action is generated in the process, the temperature is reduced to 26 ℃ according to the calculation result of a formula, the actual measured molten steel temperature is 1330 ℃, the predicted temperature value hits, and after the information is collected into a secondary system, the blowing end temperature of the converter hits.
Example 4
In a top-bottom combined blown converter with the nominal capacity of 120 tons, smelting high-carbon steel with the steel grade of U71Mn, after the converter is filled with molten iron and scrap steel, the converter needs to wait 20 minutes due to production plan adjustment, at the moment, the temperature of molten steel in the converter is measured to 1350 ℃, the process has a shaking furnace after 20 minutes of actual waiting, the time is 2.5 minutes, the temperature is reduced to 37.7 ℃ according to the calculation result of a formula, the actual measured molten steel temperature is 1315 ℃, the predicted temperature value hits, and after the information is collected into a secondary system, the blowing end temperature of the converter hits.
Example 5
In the process of smelting high-carbon steel with the steel grade of U75V on a top-bottom combined blowing converter with the nominal capacity of 120 tons, the converter is forced to wait 5.2min due to the fault of sublance equipment, the temperature of molten steel in the converter is measured at 1440 ℃, the process is provided with a shaking furnace, the time is 0.8min, the temperature is reduced to 21.2 ℃ according to the calculation result of a formula, the temperature of the actually measured molten steel is 1425 ℃, the predicted temperature value hits, and after the information is collected into a secondary system, the blowing end temperature of the converter hits.
Example 6
In the process of smelting medium carbon steel with the steel grade of 37Mn5 on a top-bottom combined blowing converter with the nominal capacity of 120 tons, the converter is forced to wait for 6.4min due to the fault of oxygen lance equipment, at the moment, the temperature of molten steel in the converter is measured to be 1540 ℃, the process is provided with a shaking furnace, the time is 1min, the temperature is reduced to 23.2 ℃ according to the calculation result of a formula, the temperature of the actually measured molten steel is 1520 ℃, the predicted temperature value hits, and after the information is collected into a secondary system, the temperature of the blowing end point of the converter hits.
Example 7
In the process of smelting high-carbon steel with the steel grade GCr15 on a top-bottom combined blowing converter with the nominal capacity of 120 tons, the converter is forced to wait 8.6min due to the fault of a fume hood equipment, the temperature of molten steel in the converter is measured to be 1510 ℃, the converter is provided with a shaking furnace in the process, the time is 2min, the temperature is reduced to 25.8 ℃ according to the calculation result of a formula, the temperature of the actually measured molten steel is 1485 ℃, the predicted temperature value hits, and after the information is collected into a secondary system, the temperature of the converter at the blowing end is hit.
Example 8
In the process of smelting low-carbon steel with the steel grade of SAE100 on a top-bottom combined blown converter with the nominal capacity of 120 tons, the converter is forced to wait for 2.6min due to the fault of charging equipment, the temperature of molten steel in the converter is measured at 1450 ℃, no shaking is performed in the process, the temperature is reduced to 10.1 ℃ according to the calculation result of a formula, the temperature of the actually measured molten steel is 1445 ℃, the predicted temperature value hits, and after the information is collected into a secondary system, the temperature of the blowing end point of the converter hits.
The above embodiments are only for illustrating the technical solution of the present invention, and it should be understood by those skilled in the art that although the present invention has been described in detail with reference to the above embodiments: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, which is intended to be encompassed by the claims.
Claims (4)
1. A method for improving hit rate of automatic steelmaking, which is characterized by comprising the following steps:
(1) Collecting abnormal factor parameters, wherein the abnormal factors comprise converter waiting time, bottom blowing strength and whether a converter shakes or not;
(2) Substituting the abnormal factor parameters into a formula to calculate the temperature loss, wherein the formula is as follows:
and
wherein deltat is the unit min of the waiting time of the converter;corresponding temperature loss when the waiting time of the converter is 0 is expressed as the unit DEG C; />The unit of the temperature loss is per unit of ℃/min when the waiting time of the converter is infinity; θ tilt The temperature loss is the unit of the temperature loss when the converter shakes; />Temperature loss caused by bottom blowing is unit per minute; τ w Is a correlation coefficient, and is in units of min;
(3) And analyzing the calculation result, wherein the deviation between the predicted temperature and the actual measured temperature is within +/-5 ℃, namely the hit is obtained, and otherwise, the deviation is regarded as a deviation target.
2. A method for improving the hit rate of automatic steelmaking according to claim 1, wherein: in the step (2), the values of the related parameters are referred as follows:
θ tilt ＝6.5-7.5℃，/>τ w ＝2min。
3. a method for improving the hit rate of automatic steelmaking according to claim 2, wherein: temperature loss theta during converter shaking tilt The values are referenced below: the shaking time is less than or equal to 1min, less than or equal to 2min, and exceeds the upper limit of 2 min.
4. A method for improving the hit rate of automatic steelmaking according to claim 2, wherein: temperature loss due to bottom blowingThe values are referenced below: taking 0.2 ℃/min waiting before converting, and stopping taking 0.1 ℃/min waiting in the converting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310454804.8A CN116662711A (en) | 2023-04-25 | 2023-04-25 | Method for improving hit rate of automatic steelmaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310454804.8A CN116662711A (en) | 2023-04-25 | 2023-04-25 | Method for improving hit rate of automatic steelmaking |
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| Publication Number | Publication Date |
|---|---|
| CN116662711A true CN116662711A (en) | 2023-08-29 |
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|---|---|---|---|
| CN202310454804.8A Pending CN116662711A (en) | 2023-04-25 | 2023-04-25 | Method for improving hit rate of automatic steelmaking |
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| Country | Link |
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| CN (1) | CN116662711A (en) |
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2023
- 2023-04-25 CN CN202310454804.8A patent/CN116662711A/en active Pending
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