CN111041150A - Control method for automatic slag splashing of converter - Google Patents
Control method for automatic slag splashing of converter Download PDFInfo
- Publication number
- CN111041150A CN111041150A CN201811189531.4A CN201811189531A CN111041150A CN 111041150 A CN111041150 A CN 111041150A CN 201811189531 A CN201811189531 A CN 201811189531A CN 111041150 A CN111041150 A CN 111041150A
- Authority
- CN
- China
- Prior art keywords
- slag splashing
- mode
- slag
- furnace bottom
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
- C21C5/441—Equipment used for making or repairing linings
- C21C5/443—Hot fettling; Flame gunning
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a control method for automatic slag splashing of a converter, which comprises the following steps: step one, presetting a slag splashing mode basic template under a conventional smelting mode and a slag remaining smelting mode; step two, acquiring an actual smelting mode of the converter on site, calculating the slag amount of slag splashing required when the converter is in an SO auxiliary measurement state, and feeding the slag splashing into the converter according to a preset addition system; step three, calculating the total slag splashing time; determining the gun position of a slag splashing gun, the nitrogen flow and the slag splashing time of each smelting stage on site according to the actual smelting mode, the total slag splashing time and the slag splashing mode basic template of the converter, and controlling slag splashing according to the gun position, the nitrogen flow and the slag splashing time; and step five, returning to the step two to circularly control slag splashing. The slag splashing method is simple in structure and convenient to use, can automatically control the slag splashing process, is more scientific and reasonable, can improve the field efficiency, reduces the material consumption, and reduces the smelting period, thereby achieving the purposes of reducing cost and improving efficiency.
Description
Technical Field
The invention relates to a control method for automatically splashing slag of a converter, in particular to an automatic control method for realizing splashing slag of the converter in a smelting process.
Background
With the demand of automatic and intelligent development of steel making, the development and application of a converter one-key steel making model and an automatic steel tapping technology become mature day by day, the automation of the converter steel making process also comprises automatic slag splashing and furnace protection, automatic slag discharging, automatic furnace baking and the like, so that the converter can achieve the automatic control of the whole process, and the stability of the production process is improved. At present, the slag splashing process of most converters in steel plants is manually operated, operators mainly perform manual operation according to experience, operating regulations and the like in the slag splashing process of the converters, the weight of slag splashing materials needing to be input is set, and the gun position and the nitrogen flow and the slag splashing time in the slag splashing process are set according to the furnace bottom condition. However, the manual operation has large fluctuation, so that the consumption of slag splashing materials on site is high, the slag splashing time is long, the cost is not reduced, the smelting period is not shortened, and the site efficiency is improved.
Disclosure of Invention
The invention aims to solve the technical problems that: the control method for automatic slag splashing of the converter is capable of shortening the smelting period, improving the field efficiency, shortening the smelting period and improving the field efficiency.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a control method for automatic slag splashing of a converter is characterized in that smelting modes of the converter comprise a conventional smelting mode and a slag remaining smelting mode, and each smelting mode is further divided into a furnace bottom expanding mode, a furnace bottom maintaining mode and a furnace bottom lowering mode according to the thickness of the furnace bottom of the converter; the control method comprises the following steps:
step one, presetting a slag splashing mode basic template under a conventional smelting mode and a slag remaining smelting mode, wherein the basic template sets the ratio of the gun position of a slag splashing gun, the nitrogen flow and the slag splashing time of each smelting stage under a furnace bottom expanding mode, a furnace bottom maintaining mode and a furnace bottom lowering mode;
step two, acquiring an actual smelting mode of the converter on site, calculating the slag amount of slag splashing required when the converter is in a TSO auxiliary measurement state, and feeding the slag splashing into the converter according to a preset addition system;
step three, calculating the total slag splashing time;
determining the gun position of a slag splashing gun, the nitrogen flow and the slag splashing time of each smelting stage on site according to the actual smelting mode, the total slag splashing time and the slag splashing mode basic template of the converter, and controlling slag splashing according to the gun position, the nitrogen flow and the slag splashing time;
and step five, returning to the step two to circularly control slag splashing.
The method for calculating the slag amount of the slag splashing required in the step two and the method for calculating the total slag splashing time in the step four are the prior art, and related technical documents can be referred to, so that the details are not repeated.
The automatic control of the converter slag splashing comprises automatic calculation and automatic feeding of slag splashing materials, and automatic control of the height of a slag splashing gun, the nitrogen flow and the slag splashing time. Along with the requirements of automatic and intelligent development of steel making, automatic slag splashing control has important significance for improving the stability of the slag splashing process, improving the labor efficiency and saving the material consumption.
The further improvement of the technical scheme is as follows: in the second step, when the actual smelting mode of the converter is obtained, the mode of raising the furnace bottom is determined when the thickness of the furnace bottom is less than 20mm (the lowest value of the thickness of the furnace bottom-the standard thickness of the furnace bottom), the mode of maintaining the furnace bottom is determined when the thickness of the furnace bottom is less than or equal to 20mm (the lowest value of the thickness of the furnace bottom-the standard thickness of the furnace bottom) is less than or equal to 100mm, and the mode of lowering the furnace bottom is determined when the thickness of the.
The further improvement of the technical scheme is as follows: and in the fourth step, the gun position of the slag splashing gun, the nitrogen flow and the slag splashing time are controlled by the PLC.
The slag splashing method is simple in structure and convenient to use, can realize automatic control of the slag splashing process, is more scientific and reasonable in slag splashing process, can improve the field efficiency, reduces the material consumption and reduces the smelting period, and therefore the purposes of reducing cost and improving efficiency are achieved.
Detailed Description
Examples
The smelting modes of the converter in the embodiment comprise a conventional smelting mode and a slag remaining smelting mode, and each smelting mode is further divided into a furnace bottom rising mode, a furnace bottom maintaining mode and a furnace bottom lowering mode according to the thickness of the furnace bottom of the converter.
The control method comprises the following steps:
step one, presetting a slag splashing mode basic template under a conventional smelting mode and a slag remaining smelting mode, wherein the basic template sets the ratio of the gun position of a slag splashing gun, the nitrogen flow and the slag splashing time of each smelting stage under a furnace bottom expanding mode, a furnace bottom maintaining mode and a furnace bottom lowering mode.
The slag splashing mode basic template is used for defining and maintaining the slag splashing mode basic template, a process worker sets a conventional smelting mode and a basic slag splashing mode in a slag remaining smelting mode according to field operation experience and the like, authorizes a corresponding operator to maintain each slag splashing mode on a picture, can perform operations such as addition and deletion on a charging mode, and stores the operation into a background database.
Because the converter smelting process comprises a conventional smelting process and a slag remaining smelting process, different slag splashing furnace protection processes are formulated according to the two smelting processes, so that the automatic control of the slag splashing process is realized, and the slag splashing process is more efficient and stable. In this embodiment, for a certain production line of the Haimeshan iron and steel works Co., Ltd, the content of the slag splashing mode basic template definition is as follows:
1. conventional smelting mode
1) The furnace bottom expanding mode is divided into 8 smelting stages, and the ratio of the slag splashing gun position, the nitrogen flow and the slag splashing time of each stage is as follows:
| phases | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Nitrogen flow, Nm3/h | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 |
| Gun position, cm | 260 | 320 | 300 | 320 | 300 | 320 | 350 | 350 |
| Time, according to | 22.22 | 11.11 | 11.11 | 11.11 | 11.11 | 11.11 | 11.11 | 11.11 |
2) Keeping a furnace bottom mode, and totally dividing into 8 smelting stages, wherein the ratio of the slag splashing gun position, the nitrogen flow and the slag splashing time of each stage is as follows:
| phases | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Nitrogen flow, Nm3/h | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 |
| Gun position, cm | 260 | 320 | 300 | 320 | 300 | 220 | 280 | 280 |
| Time, according to | 25.00 | 12.50 | 12.50 | 12.50 | 12.50 | 12.50 | 6.25 | 6.25 |
3) The furnace bottom lowering mode is divided into 8 smelting stages, and the ratio of the slag splashing gun position, the nitrogen flow and the slag splashing time of each stage is as follows:
| phases | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Nitrogen flow, Nm3/h | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 |
| Gun position, cm | 260 | 320 | 300 | 320 | 300 | 260 | 260 | |
| Time, according to | 28.57 | 14.29 | 14.29 | 14.29 | 14.29 | 7.14 | 7.14 |
2. Slag remaining smelting mode
1) The furnace bottom expanding mode is divided into 8 smelting stages, and the ratio of the slag splashing gun position, the nitrogen flow and the slag splashing time of each stage is as follows:
| phases | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Nitrogen flow, Nm3/h | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 |
| Gun position, cm | 260 | 320 | 300 | 320 | 300 | 320 | 350 | 260 |
| Time, according to | 22.22 | 11.11 | 7.41 | 14.81 | 7.41 | 14.81 | 11.11 | 11.11 |
2) Furnace bottom mode is maintained. The method is divided into 8 smelting stages, and the ratio of the slag splashing gun position, the nitrogen flow and the slag splashing time of each stage is as follows:
| phases | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Nitrogen flow, Nm3/h | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 |
| Gun position, cm | 260 | 320 | 300 | 320 | 300 | 280 | 280 | 260 |
| Time, according to | 25.00 | 12.50 | 12.50 | 12.50 | 12.50 | 6.25 | 6.25 | 12.50 |
3) A reduced hearth mode. The method is divided into 8 smelting stages, and the ratio of the slag splashing gun position, the nitrogen flow and the slag splashing time of each stage is as follows:
| phases | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Nitrogen flow, Nm3/h | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 | 55000 |
| Gun position, cm | 260 | 320 | 300 | 320 | 300 | 260 | 260 |
| Time, according to | 28.57 | 14.29 | 11.90 | 11.90 | 11.90 | 7.14 | 14.29 |
And step two, acquiring an actual smelting mode of the converter on site, calculating the slag amount of the slag splashing required when the converter is in a TSO auxiliary measurement state, distributing the slag splashing to charging batches, and feeding the slag into the converter according to a preset charging system. When feeding, the auxiliary material feeding device controls the weighing of the slag splashing material, the slag splashing material is added into the collecting hopper after being weighed, the material is vibrated according to a slag splashing material adding system, the slag splashing material is added into the converter, and the slag splashing material is controlled to be put into the converter.
The method for acquiring the actual smelting mode of the converter comprises the following steps of setting a furnace bottom rising mode when the thickness of the furnace bottom is less than 20mm (the minimum value of the thickness of the furnace bottom-the standard thickness of the furnace bottom), setting a furnace bottom maintaining mode when the thickness of the furnace bottom is less than or equal to 20mm (the minimum value of the thickness of the furnace bottom-the standard thickness of the furnace bottom) is less than or equal to 100mm, and setting a furnace bottom falling mode when the thickness of the furnace bottom is greater than 100 mm.
The slag amount calculation method of the slag splashing material is the prior art, the required slag amount of the slag splashing material can be calculated according to auxiliary material information, molten iron components, slag components, auxiliary measured steel temperature and the like obtained on site, and the components and the slag amount of the slag splashing material are finally obtained.
The slag splashing charging system adopted in the conventional smelting mode in the embodiment is as follows:
| slag splashing time, s | Light white | Dolomite |
| 30 | Adding into | |
| 90 | Adding into |
The slag splashing adding system adopted in the slag remaining smelting mode in the embodiment is as follows:
| slag splashing time, s | Light white | Dolomite |
| 30 | Adding into | |
| Total slag splashing time-30 | Adding into |
The slag splash addition system can be adjusted according to experience and the like.
And step three, calculating the total slag splashing time, and obtaining the total slag splashing time according to the measured steel temperature, the last slag amount, the actual furnace bottom thickness, slag splashing material components and the like.
And step four, determining the lance position of the slag splashing gun, the nitrogen flow and the slag splashing time of each smelting stage on site according to the actual smelting mode, the total slag splashing time and the slag splashing mode basic template of the converter, and controlling slag splashing according to the determined positions. The gun position of the slag splashing gun, the nitrogen flow and the slag splashing time are preferably controlled by a PLC, so that the automatic control can be conveniently realized.
And step five, returning to the step two to circularly control slag splashing.
The present invention is not limited to the specific technical solutions described in the above embodiments, and other embodiments may be made in the present invention in addition to the above embodiments. It will be understood by those skilled in the art that various changes, substitutions of equivalents, and alterations can be made without departing from the spirit and scope of the invention.
Claims (3)
1. A control method for automatic slag splashing of a converter is characterized in that smelting modes of the converter comprise a conventional smelting mode and a slag remaining smelting mode, and each smelting mode is further divided into a furnace bottom expanding mode, a furnace bottom maintaining mode and a furnace bottom lowering mode according to the thickness of the furnace bottom of the converter; the control method comprises the following steps:
step one, presetting a slag splashing mode basic template under a conventional smelting mode and a slag remaining smelting mode, wherein the basic template sets the ratio of the gun position of a slag splashing gun, the nitrogen flow and the slag splashing time of each smelting stage under a furnace bottom expanding mode, a furnace bottom maintaining mode and a furnace bottom lowering mode;
step two, acquiring an actual smelting mode of the converter on site, calculating the slag amount of slag splashing required when the converter is in an SO auxiliary measurement state, and feeding the slag splashing into the converter according to a preset addition system;
step three, calculating the total slag splashing time;
determining the gun position of a slag splashing gun, the nitrogen flow and the slag splashing time of each smelting stage on site according to the actual smelting mode, the total slag splashing time and the slag splashing mode basic template of the converter, and controlling slag splashing according to the gun position, the nitrogen flow and the slag splashing time;
and step five, returning to the step two to circularly control slag splashing.
2. The method for controlling automatic slag splashing of the converter according to claim 1, wherein: in the second step, when the actual smelting mode of the converter is obtained, the mode of raising the furnace bottom is determined when the thickness of the furnace bottom is less than 20mm (the lowest value of the thickness of the furnace bottom-the standard thickness of the furnace bottom), the mode of maintaining the furnace bottom is determined when the thickness of the furnace bottom is less than or equal to 20mm (the lowest value of the thickness of the furnace bottom-the standard thickness of the furnace bottom) is less than or equal to 100mm, and the mode of lowering the furnace bottom is determined when the thickness of the.
3. The method for controlling automatic slag splashing of the converter according to claim 1, wherein: and in the fourth step, the gun position of the slag splashing gun, the nitrogen flow and the slag splashing time are controlled by the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811189531.4A CN111041150A (en) | 2018-10-12 | 2018-10-12 | Control method for automatic slag splashing of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811189531.4A CN111041150A (en) | 2018-10-12 | 2018-10-12 | Control method for automatic slag splashing of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111041150A true CN111041150A (en) | 2020-04-21 |
Family
ID=70229757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811189531.4A Pending CN111041150A (en) | 2018-10-12 | 2018-10-12 | Control method for automatic slag splashing of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111041150A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853033A (en) * | 2021-03-10 | 2021-05-28 | 柳州钢铁股份有限公司 | Efficient slag splashing intelligent control method and system based on furnace mouth image analysis |
| CN114058769A (en) * | 2021-10-27 | 2022-02-18 | 重庆钢铁股份有限公司 | Method for reducing converter bottom under high-iron-steel ratio smelting condition of converter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000313912A (en) * | 1999-04-28 | 2000-11-14 | Nippon Steel Corp | Slag coating method in converter |
| JP2003155512A (en) * | 2001-11-20 | 2003-05-30 | Kobe Steel Ltd | Method for coating refractory in furnace |
| CN102787200A (en) * | 2011-05-20 | 2012-11-21 | 上海梅山钢铁股份有限公司 | Slag splashing method for controlling converter profile |
| CN106167844A (en) * | 2016-08-26 | 2016-11-30 | 新兴铸管股份有限公司 | A kind of bottom blowing pattern autocontrol method of combined blown converter |
| CN206916179U (en) * | 2017-07-14 | 2018-01-23 | 山信软件股份有限公司 | Slag equipment is splashed in a kind of converter automatically |
-
2018
- 2018-10-12 CN CN201811189531.4A patent/CN111041150A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000313912A (en) * | 1999-04-28 | 2000-11-14 | Nippon Steel Corp | Slag coating method in converter |
| JP2003155512A (en) * | 2001-11-20 | 2003-05-30 | Kobe Steel Ltd | Method for coating refractory in furnace |
| CN102787200A (en) * | 2011-05-20 | 2012-11-21 | 上海梅山钢铁股份有限公司 | Slag splashing method for controlling converter profile |
| CN106167844A (en) * | 2016-08-26 | 2016-11-30 | 新兴铸管股份有限公司 | A kind of bottom blowing pattern autocontrol method of combined blown converter |
| CN206916179U (en) * | 2017-07-14 | 2018-01-23 | 山信软件股份有限公司 | Slag equipment is splashed in a kind of converter automatically |
Non-Patent Citations (1)
| Title |
|---|
| 王丽娟: ""自动溅渣在莱钢大型炼钢4#转炉中的研究与实现"", 《自动化应用》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853033A (en) * | 2021-03-10 | 2021-05-28 | 柳州钢铁股份有限公司 | Efficient slag splashing intelligent control method and system based on furnace mouth image analysis |
| CN112853033B (en) * | 2021-03-10 | 2023-10-13 | 柳州钢铁股份有限公司 | Efficient slag splashing intelligent control method and system based on furnace mouth image analysis |
| CN114058769A (en) * | 2021-10-27 | 2022-02-18 | 重庆钢铁股份有限公司 | Method for reducing converter bottom under high-iron-steel ratio smelting condition of converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111041150A (en) | Control method for automatic slag splashing of converter | |
| CN101561224A (en) | Method for controlling combustion atmosphere in large-scale walking beam type plate blank heating furnace | |
| CN106167844B (en) | A kind of bottom blowing mode autocontrol method of combined blown converter | |
| Lin et al. | Consideration of green intelligent steel processes and narrow window stability control technology on steel quality | |
| CN105714014A (en) | Converter oxygen gun/charging/temperature institution comprehensive simplified model system and operation method | |
| CN110850915A (en) | Self-learning-based steelmaking molten steel process temperature control system and control method | |
| CN103555879B (en) | Control method for reducing total iron content of SPHC (steel plate heat commercial) final slag | |
| CN102591285A (en) | Universal automatic control system for AOD (Argon Oxygen Decarburization) and top-bottom combined blown furnace | |
| CN104556226A (en) | Method for producing zirconium tetrachloride | |
| CN113981167B (en) | Multi-mode smelting method based on molten iron grading system | |
| CN103305656B (en) | A kind of IF steel RH vacuum decarburization course control method for use | |
| CN107557520A (en) | The autocontrol method of convertor steelmaking process charging, oxygen lance position and oxygen flow | |
| CN106755711A (en) | One-touch intelligent method for making steel | |
| CN115927784B (en) | Based on CO 2 Converter steelmaking end point control method by dynamic mixed blowing | |
| CN109539812A (en) | A kind of sleeve kiln intelligent gas controlling device and control method | |
| CN107502698A (en) | A kind of automatic Steelmaking method suitable for less-slag melting | |
| CN103374638B (en) | Closed-loop control method for burdening of blast furnace | |
| CN104232834B (en) | Pneumatic steelmaking automaton and its application method based on pattern | |
| CN111321269A (en) | Slag splashing method for converter | |
| JP3213241U (en) | Out-of-furnace molten steel dephosphorization system | |
| CN116049299A (en) | Visual carbon flow analysis method for steel production process | |
| CN103898271B (en) | A kind of feed bin automatic weighing control method of converter alloy production system | |
| CN116227106A (en) | Energy consumption prediction method and system for refining furnace in steel industry | |
| CN207970804U (en) | Molybdenum-iron smelts feed proportioning system | |
| CN103073203B (en) | Sleeve kiln energy consumption monitoring system and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200421 |
|
| RJ01 | Rejection of invention patent application after publication |