CN109628679B - Converter tapping judgment method - Google Patents
Converter tapping judgment method Download PDFInfo
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- CN109628679B CN109628679B CN201910117999.0A CN201910117999A CN109628679B CN 109628679 B CN109628679 B CN 109628679B CN 201910117999 A CN201910117999 A CN 201910117999A CN 109628679 B CN109628679 B CN 109628679B
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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
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Abstract
The application discloses a converter tapping judgment method, which comprises the following steps: setting steel type categories, and setting standard values according to the steel type categories; selecting a judgment mode: and when the smelting process is abnormal, selecting a manual judgment mode. When the smelting process is normal: and when the TSC test data and the TSO measurement data meet the standard values, tapping is automatically judged. And when the TSC test data and the TSO measurement data do not accord with the standard values or when the TSC test data accord with the standard values and the TSO measurement data do not accord with the standard values, selecting a manual judgment mode. When the TSC test data do not accord with the standard value and the TSO measurement data accord with the standard value: when TSO test data meet the standard value, tapping is automatically judged; otherwise, the manual judgment mode is selected. According to the converter tapping judgment method, different tapping judgment modes can be selected according to the actual smelting condition, the converter tapping judgment process is simplified, and the waiting time of the converter and the end point period of the converter are shortened.
Description
Technical Field
The application relates to the technical field of steel smelting, in particular to a converter tapping judgment method.
Background
The molten steel needs to be judged before tapping of the converter, and the steel can be tapped only when the temperature, the components and the like of the molten steel meet the requirements.
The modern large and medium converter is provided with a sublance system, the components and the temperature of molten steel at the end point can be accurately measured and tested through a TSO probe, and tapping is carried out when measured data and tested data are qualified.
However, the conventional sublance operation steps are TSC measurement, sampling-test-TSO measurement, sampling-test-determination-tapping, and the determination procedure needs to wait for the completion of the test of the steel sample composition after the TSO measurement is completed to determine the tapping. The traditional sublance has complex operation process and longer waiting time, and the terminal period of the converter is seriously influenced.
Disclosure of Invention
The application provides a converter tapping judgment method, which aims to solve the technical problem that the converter tapping judgment process is complex.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
the embodiment of the application discloses a converter tapping judgment method, which comprises the following steps: setting steel type categories, and setting standard values according to the steel type categories;
selecting a judgment mode: when smelting abnormality occurs in the smelting process, judging whether tapping is performed or not by selecting a manual judgment mode;
when the smelting process is normal, TSC test data and TSO measurement data are collected:
(1) when TSC test data and TSO measurement data both accord with standard values, tapping is automatically judged;
(2) when the TSC test data and the TSO measurement data do not accord with the standard values, a manual judgment mode is selected to judge whether steel tapping is carried out;
(3) when the TSC test data meet the standard value and the TSO measurement data do not meet the standard value, a manual judgment mode is selected to judge whether steel is tapped;
(4) and when the TSC test data does not accord with the standard value and the TSO measurement data accords with the standard value, waiting for the TSO test data:
when TSO test data meet the standard value, tapping is automatically judged;
and when the TSO test data do not meet the standard value, selecting a manual judgment mode to judge whether tapping is performed.
Optionally, the smelting anomaly comprises: large residue and slag bubbles.
Optionally, the TSC assay data comprises TSC assay phosphorous.
Optionally, the TSO measurement data includes: TSO measures carbon, TSO measures temperature.
Optionally, the TSO assay data comprises: TSO tests carbon, TSO tests phosphorus.
Optionally, the steel grades comprise: medium carbon series, common carbon series, low carbon series, ultra-low carbon series, and ultra-low phosphorus series.
Compared with the prior art, the beneficial effect of this application is:
the application discloses a converter tapping judgment method, which comprises the following steps: setting steel type categories, and setting standard values according to the steel type categories; selecting a judgment mode: when smelting abnormality occurs in the smelting process, judging whether tapping is performed or not by selecting a manual judgment mode; when the smelting process is normal, TSC test data and TSO measurement data are collected: when TSC test data and TSO measurement data both accord with standard values, tapping is automatically judged; when the TSC test data and the TSO measurement data do not accord with the standard values, a manual judgment mode is selected to judge whether steel tapping is carried out; when the TSC test data meet the standard value and the TSO measurement data do not meet the standard value, selecting a manual judgment mode to judge whether steel is tapped; and when the TSC test data does not accord with the standard value and the TSO measurement data accords with the standard value, waiting for the TSO test data: when TSO test data meet the standard value, tapping is automatically judged; and when the TSO test data do not meet the standard value, selecting a manual judgment mode to judge whether tapping is performed. According to the converter tapping judgment method provided by the application, different tapping judgment modes can be selected according to the actual smelting condition, the processes of TSC measurement, sampling-assay-TSO measurement, sampling-assay-judgment-tapping which are required by the traditional sublance operation are avoided, the converter tapping judgment process is simplified, and the waiting time of the converter and the terminal period of the converter are shortened.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a converter tapping determination method provided in an embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a schematic flow chart of a converter tapping determination method provided in an embodiment of the present application is shown, and the embodiment of the present application discloses a converter tapping determination method, including:
setting the type of steel grade, and setting a standard value according to the type of steel grade. The steel grades include: medium carbon series, common carbon series, low carbon series, ultra-low carbon series, and ultra-low phosphorus series. The steel grade categories can be divided according to the steel grade components, the alloy addition amount, the end point components and the like. And setting a standard value according to the steel type category, setting a steel tapping mark according to the steel type category according to the specific steel type judgment standard, and setting a specific detailed steel tapping judgment standard and a component standard according to the steel tapping mark. As shown in Table 1, Table 1 provides a steel tapping judgment criterion according to different steel grade categories.
Table 1: tapping judgment standard for different steel types
In table 1, according to the steel grade and the actual conditions of each plant, whether each judgment parameter participates in the judgment option can be selected, and if the selection is yes, the item is indicated to participate in the judgment; if the selection is not, the option is not involved in the judgment. In the embodiment of the application, two items of TSC measured temperature and TSC measured carbon do not participate in tapping judgment standard.
Selecting a judgment mode: and when the smelting process is abnormal, judging whether tapping is performed or not by selecting a manual judgment mode. If abnormal conditions occur in the smelting process, such as large slag remaining amount, slag bubbles, smelting abnormal conditions and the like, and whether the steel tapping requirements are met needs to be artificially judged, an artificial judgment mode is selected, and steel can be tapped after the operator judges that the steel tapping requirements are met.
When the smelting process is normal, TSC test data and TSO measurement data are collected, wherein the TSC test data comprise TSC test phosphorus, and the TSO measurement data comprise: TSO measures carbon, TSO measures temperature, and the TSO assay data includes: TSO tests carbon, TSO tests phosphorus.
When TSC test data and TSO measurement data both accord with standard values, tapping is automatically judged; when the TSC test data and the TSO measurement data do not accord with the standard values, a manual judgment mode is selected to judge whether steel tapping is carried out; and when the TSC test data meet the standard value and the TSO measurement data do not meet the standard value, selecting a manual judgment mode to judge whether steel is tapped.
And when the TSC test data does not accord with the standard value and the TSO measurement data accords with the standard value, waiting for the TSO test data:
when TSO test data meet the standard value, tapping is automatically judged; and when the TSO test data do not meet the standard value, selecting a manual judgment mode to judge whether tapping is performed.
Taking the medium-carbon steel grade as an example, the converter tapping judgment method under the normal condition comprises the following steps:
the standard values participating in judgment of the medium carbon series steel grade comprise: TSC test phosphorus is less than or equal to 0.025 percent, TSO measurement carbon is less than or equal to 0.2 percent, TSO measurement temperature is more than or equal to 1630 percent, TSO test carbon is less than or equal to 0.2 percent, and TSO test phosphorus is less than or equal to 0.02 percent.
And if the TSC test data and the TSO measurement data are both in accordance with the standard values, namely TSC test phosphorus is less than or equal to 0.025 percent, TSO measurement carbon is less than or equal to 0.2 percent, TSO measurement temperature is more than or equal to 1630 ℃, the TSO test carbon and test phosphorus data are not required to be waited, and steel tapping is automatically judged.
If the TSC test data meets the standard value, the TSO measured carbon and the measured temperature do not meet the standard value, namely TSC tested phosphorus is less than or equal to 0.025 percent, TSO measured carbon is less than or equal to 0.2 percent, TSO measured temperature is less than or equal to 1630 ℃, or TSC tested phosphorus is less than or equal to 0.025 percent, TSO measured carbon is greater than or equal to 0.2 percent, TSO measured carbon is greater than or equal to 1630.2 percent, TSO measured temperature is less than or equal to 1630 ℃, the condition is converted into an abnormal condition, and a manual judgment mode is selected to judge whether steel is tapped or not.
If the TSC test data and the TSO measurement data do not meet the standard values, namely TSC test phosphorus is larger than 0.025%, TSO measurement carbon is smaller than or equal to 0.2%, and TSO measurement temperature is larger than or equal to 1630 ℃, any one of the TSC test phosphorus and the TSO measurement carbon is not met, and if the TSC test phosphorus and the TSO measurement temperature are abnormal, a manual judgment mode is selected to judge whether steel is tapped.
If the TSC test data does not meet the standard value, the TSO measurement data meets the standard value, namely TSC test phosphorus is more than 0.025 percent, TSO measurement carbon is less than or equal to 0.2 percent, and TSO measurement temperature is more than or equal to 1630 ℃, the TSO test data is waited: if the TSO test data meet the standard value, namely TSO test carbon is less than or equal to 0.2 percent, and TSO test phosphorus is less than or equal to 0.02 percent, automatically judging tapping; if the TSO test data does not meet the standard value, namely TSO test carbon is greater than 0.2% or TSO test phosphorus is greater than 0.02%, the TSO test carbon is converted into an abnormal condition, and a manual judgment mode is selected to judge whether steel is tapped or not.
Through the converter tapping judging process introduced above, the processes of TSC measurement, sampling-assay-TSO measurement, sampling-assay-judgment-tapping which are required by the traditional sublance operation can be avoided in the actual operation, the converter tapping judging process is simplified, and the waiting time of the converter and the terminal period of the converter are shortened.
The application provides a converter tapping judgment method, which comprises the following steps: setting steel type categories, and setting standard values according to the steel type categories; selecting a judgment mode: when smelting abnormality occurs in the smelting process, judging whether tapping is performed or not by selecting a manual judgment mode; when the smelting process is normal, TSC test data and TSO measurement data are collected: when TSC test data and TSO measurement data both accord with standard values, tapping is automatically judged; when the TSC test data and the TSO measurement data do not accord with the standard values, a manual judgment mode is selected to judge whether steel tapping is carried out; when the TSC test data meet the standard value and the TSO measurement data do not meet the standard value, selecting a manual judgment mode to judge whether steel is tapped; and when the TSC test data does not accord with the standard value and the TSO measurement data accords with the standard value, waiting for the TSO test data: when TSO test data meet the standard value, tapping is automatically judged; and when the TSO test data do not meet the standard value, selecting a manual judgment mode to judge whether tapping is performed.
By the converter tapping judgment method, different tapping judgment modes can be selected according to the actual smelting condition, the processes of TSC measurement, sampling-assay-TSO measurement, sampling-assay-judgment-tapping in the traditional sublance operation are avoided, and after TSC measurement and sampling-assay-TSO measurement, tapping judgment can be directly carried out, so that the converter tapping judgment process is simplified, and the waiting time of the converter and the terminal point period of the converter are shortened.
Table 2 provides detailed judgment criteria for three steel grades, 12MN L RR1, AN4242D3 and XG235B01, taking specific steel grades as AN example:
TABLE 2 Steel tapping judgment criteria, carbon temperature double hit criteria, and composition criteria of 12MN L RR1, AN4242D3, XG235B01
In table 2:
1. 12MN L RR1, AN4242D3 and XG235B01 are specific steel grade codes, and detailed steel tapping judgment standards, carbon temperature double hit standards and component standards are set according to the steel grade codes.
2. Double hit in the judgment standard is only used as the basis of end point carbon and temperature hit, and is not used as the standard for tapping.
3. The component standard is the judgment requirement of a specific steel grade code, the tapping standard must be established according to the component standard, and after all factors are considered comprehensively, the final component must meet the component standard requirement so as to tap steel.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (6)
1. A method for judging converter tapping is characterized by comprising the following steps: setting steel type categories, and setting standard values according to the steel type categories;
selecting a judgment mode: when abnormal conditions occur in the smelting process, a manual judgment mode is selected to judge whether steel is tapped or not;
when the smelting process is normal, TSC test data and TSO measurement data are collected:
when TSC test data and TSO measurement data both accord with standard values, tapping is automatically judged;
when the TSC test data and the TSO measurement data do not accord with the standard values, a manual judgment mode is selected to judge whether steel tapping is carried out;
when the TSC test data meet the standard value and the TSO measurement data do not meet the standard value, a manual judgment mode is selected to judge whether steel is tapped;
when the TSC test data does not accord with the standard value and the TSO measurement data accords with the standard value, waiting for the TSO test data, and automatically judging steel tapping when the TSO test data accords with the standard value;
and when the TSO test data do not meet the standard value, selecting a manual judgment mode to judge whether tapping is performed.
2. The converter tapping determination method according to claim 1, wherein the abnormal condition includes: large residue and slag bubbles.
3. The converter tapping determination method according to claim 1, wherein the TSC assay data includes TSC assay phosphorus.
4. The converter tapping determination method according to claim 1, wherein the TSO measurement data includes: TSO measures carbon, TSO measures temperature.
5. The converter tapping determination method according to claim 1, wherein the TSO assay data includes: TSO tests carbon, TSO tests phosphorus.
6. The converter tap determination method according to claim 1, wherein the steel type categories include: medium carbon series, common carbon series, low carbon series, ultra-low carbon series, and ultra-low phosphorus series.
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| CN108676955A (en) * | 2018-05-02 | 2018-10-19 | 中南大学 | A kind of BOF Steelmaking Endpoint carbon content and temprature control method |
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2019
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| JPS558445A (en) * | 1978-07-04 | 1980-01-22 | Kawasaki Steel Corp | Regulating method for composition of tapped steel of bottom blasting converter |
| US4551174A (en) * | 1984-09-03 | 1985-11-05 | Nippon Kokan Kabushiki Kaisha | Method of refining molten steel by arc process |
| CN101845531A (en) * | 2010-05-07 | 2010-09-29 | 北京首钢自动化信息技术有限公司 | Converter smelting endpoint molten steel carbon and temperature control system and method thereof |
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| CN107312903A (en) * | 2017-07-14 | 2017-11-03 | 山信软件股份有限公司 | A kind of converter is tapped control system and control method automatically |
| CN108676955A (en) * | 2018-05-02 | 2018-10-19 | 中南大学 | A kind of BOF Steelmaking Endpoint carbon content and temprature control method |
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