CN111036871B - Method for controlling insertion depth of small square billet submerged nozzle - Google Patents
Method for controlling insertion depth of small square billet submerged nozzle Download PDFInfo
- Publication number
- CN111036871B CN111036871B CN201911284352.3A CN201911284352A CN111036871B CN 111036871 B CN111036871 B CN 111036871B CN 201911284352 A CN201911284352 A CN 201911284352A CN 111036871 B CN111036871 B CN 111036871B
- Authority
- CN
- China
- Prior art keywords
- insertion depth
- liquid level
- controlling
- tundish
- nozzle
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
Abstract
The invention discloses a method for controlling the insertion depth of a small square billet submerged nozzle, which specifically comprises the following steps: step 1, checking an upper limit and a lower limit in a copper pipe before casting to ensure accurate liquid level detection; step 2, adding an automatic liquid level data acquisition system in the operating system to monitor the liquid level insertion depth data in real time; step 3, measuring the insertion depth of a water gap and the lifting position of a system deviation condition step by step of a standard tundish car from a special tool in the pouring process; and 4, adjusting and optimizing the stroke of the hydraulic cylinder of the tundish car, and ensuring that the insertion depth is stabilized within the process range. The method for controlling the insertion depth of the small square billet submerged nozzle is designed, and the stable crystallizer flow field is obtained, so that slag entrapment and collision and floating of tiny impurities of molten steel in the pouring process are reduced, the purity of the molten steel is improved, meanwhile, the stable flow field ensures that a billet shell grows uniformly, accidents such as steel leakage and the like can be effectively prevented, and the internal quality of a billet is obviously improved.
Description
Technical Field
The invention relates to the technical field of insertion depth control, in particular to a method for controlling the insertion depth of a small square billet submerged nozzle.
Background
The small square billet submerged nozzle insertion depth is closely related to the molten steel quality, a stable and standard insertion depth can ensure that a stable molten steel flow field is formed, slag rolling does not occur on the liquid surface in the pouring process, tiny impurities of the molten steel collide and float upwards, the molten steel purity is improved, meanwhile, the stable flow field ensures that a billet shell grows uniformly, steel leakage and other accidents can be effectively prevented, and the internal quality of the billet is obviously improved.
The immersion type water gap insertion depth of the small square billet is a main parameter for forming a stable molten steel flow field, and the stable improvement of the product quality is promoted. The generation of wire inclusion and abnormal organization judgment is reduced, the production cost is indirectly reduced, the quantity of judgment can be reduced by about 1000 tons per month through measurement and calculation, and the production benefit is indirectly increased by 100 ten thousand yuan per month.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for controlling the insertion depth of a small square billet submerged nozzle aiming at the problems in the prior art, and by obtaining a stable crystallizer flow field, slag entrapment and collision floating of tiny impurities in molten steel in the pouring process are reduced, the purity of the molten steel is improved, meanwhile, the stable flow field ensures that a billet shell grows uniformly, the occurrence of accidents such as steel leakage and the like can be effectively prevented, and the internal quality of a billet is obviously improved.
The invention adopts the following technical scheme for solving the technical problems:
a method for controlling the insertion depth of a small square billet submerged nozzle specifically comprises the following steps:
step 1, checking an upper limit and a lower limit in a copper pipe before casting to ensure accurate liquid level detection;
step 2, adding an automatic liquid level data acquisition system in the operating system to monitor the liquid level insertion depth data in real time;
step 3, measuring the insertion depth of a water gap and the lifting position of a system deviation condition step by step of a standard tundish car from a special tool in the pouring process;
and 4, adjusting and optimizing the stroke of the hydraulic cylinder of the tundish car, and ensuring that the insertion depth is stabilized within the process range.
As a further preferable proposal of the method for controlling the insertion depth of the small square billet submerged nozzle, the invention is that
In the step 2, the insertion depth is added in the operating system to control acquisition, the absolute height of the lifting of the tundish is measured by using a laser range finder, and a PLC program is programmed according to a mathematical formula Di = B-C- (Mh-Mi) -Tdx to calculate;
di is the insertion depth of a tundish nozzle, B is a fixed total height of the insertion nozzle, C is a fixed distance between the lowest position of the tundish and the upper opening of the crystallizer, Mh is a fixed height of the crystallizer, Mi is a measured value of the height of the liquid level of the crystallizer, Tdx is a lifting height value of the tundish, and a calibration function is added.
As a further preferable scheme of the method for controlling the insertion depth of the submersed nozzle of the billet in the invention, in step 3, the actual insertion depth of the submersed nozzle is measured by a special tool after the normally open pouring, and the tape measure is used for marking and confirming.
As a further preferable scheme of the method for controlling the insertion depth of the small square billet submerged nozzle, in the step 2, when the insertion depth is measured, a position 50cm upwards from the lower end of the nozzle is selected, a mark is made, the distance from the marked position to the liquid level is measured by a special tool, and the insertion depth is calculated.
As a further preferable scheme of the method for controlling the immersion depth of the small square billet nozzle, the stroke of a hydraulic cylinder of a tundish car is adjusted by comparing the deviation between the actual insertion depth and the measured insertion depth, so that the accurate and standard insertion depth is further controlled.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. according to the method for controlling the insertion depth of the small square billet submerged nozzle, the stable crystallizer flow field is obtained, slag entrapment and collision and floating of tiny impurities of molten steel in the pouring process are reduced, the purity of the molten steel is improved, meanwhile, the stable flow field ensures that a billet shell grows uniformly, accidents such as steel leakage can be effectively prevented, and the internal quality of a billet is obviously improved;
2. compared with the prior control method, the method for controlling the insertion depth of the small square billet submerged nozzle is simple to operate and easy to operate, the labor intensity of workers can be obviously reduced, and tests prove that the qualified rate of wires is improved by 5% after the method for controlling the insertion depth is standardized, and the annual benefit is increased by 1200 ten thousand yuan.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of 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 invention.
A method for controlling the insertion depth of a small square billet submerged nozzle is shown in figure 1 and comprises the following steps:
step 1, checking an upper limit and a lower limit in a copper pipe before casting to ensure accurate liquid level detection;
step 2, adding an automatic liquid level data acquisition system in the operating system to monitor the liquid level insertion depth data in real time;
step 3, measuring the insertion depth of a water gap and the lifting position of a system deviation condition step by step of a standard tundish car from a special tool in the pouring process;
and 4, adjusting and optimizing the stroke of the hydraulic cylinder of the tundish car, and ensuring that the insertion depth is stabilized within the process range.
As a further preferable aspect of the method for controlling the insertion depth of the submersed nozzle for small billet according to the present invention, in step 2,
the method comprises the steps that insertion depth control collection is added in an operating system, the absolute height of the lifting of a tundish is measured by a laser range finder, and a PLC program is programmed according to a mathematical formula Di = B-C- (Mh-Mi) -Tdx for calculation;
di is the insertion depth of a tundish nozzle, B is a fixed total height of the insertion nozzle, C is a fixed distance between the lowest position of the tundish and the upper opening of the crystallizer, Mh is a fixed height of the crystallizer, Mi is a measured value of the height of the liquid level of the crystallizer, Tdx is a lifting height value of the tundish, and a calibration function is added.
As a further preferable scheme of the method for controlling the insertion depth of the submersed nozzle of the billet in the invention, in step 3, the actual insertion depth of the submersed nozzle is measured by a special tool after the normally open pouring, and the tape measure is used for marking and confirming.
As a further preferable scheme of the method for controlling the insertion depth of the small square billet submerged nozzle, in the step 2, when the insertion depth is measured, a position 50cm upwards from the lower end of the nozzle is selected, a mark is made, the distance from the marked position to the liquid level is measured by a special tool, and the insertion depth is calculated.
As a further preferable scheme of the method for controlling the immersion depth of the small square billet nozzle, the stroke of a hydraulic cylinder of a tundish car is adjusted by comparing the deviation between the actual insertion depth and the measured insertion depth, so that the accurate and standard insertion depth is further controlled.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (3)
1. A method for controlling the insertion depth of a small square billet submerged nozzle is characterized by comprising the following steps: the method specifically comprises the following steps:
step 1, checking an upper limit and a lower limit in a copper pipe before casting to ensure accurate liquid level detection;
step 2, selecting a position 50cm upwards from the lower end of a water gap, making a mark, measuring the distance from the marked position to the liquid level by using a laser range finder to serve as the absolute height of the lifting of the tundish, controlling and collecting by increasing the insertion depth in an operating system, and programming a PLC program according to a mathematical formula Di (B-C- (Mh-Mi) -Tdx) to calculate so as to realize the real-time monitoring of the insertion depth data of the liquid level;
di is the insertion depth of a tundish nozzle, B is a fixed total height of the insertion nozzle, C is a fixed distance between the lowest position of the tundish and the upper opening of the crystallizer, Mh is a fixed height of the crystallizer, Mi is a measured value of the height of the liquid level of the crystallizer, Tdx is a lifting height value of the tundish, and a calibration function is added;
step 3, measuring the insertion depth of a water gap and the lifting position of a system deviation condition step by step of a standard tundish car from a special tool in the pouring process;
and 4, adjusting and optimizing the stroke of the hydraulic cylinder of the tundish car, and ensuring that the insertion depth is stabilized within the process range.
2. The method of controlling the depth of insertion of a billet submerged entry nozzle of claim 1, wherein: in step 3, after the normal open casting, the actual water gap insertion depth is measured by a special tool, and the tape measure is used for marking and confirming.
3. The method of controlling the depth of insertion of a billet submerged entry nozzle of claim 1, wherein: the stroke of the hydraulic cylinder of the tundish car is adjusted by comparing the actual insertion depth with the measured insertion depth, so that the accurate and standard insertion depth is further controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284352.3A CN111036871B (en) | 2019-12-13 | 2019-12-13 | Method for controlling insertion depth of small square billet submerged nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284352.3A CN111036871B (en) | 2019-12-13 | 2019-12-13 | Method for controlling insertion depth of small square billet submerged nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111036871A CN111036871A (en) | 2020-04-21 |
| CN111036871B true CN111036871B (en) | 2021-10-08 |
Family
ID=70236245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911284352.3A Active CN111036871B (en) | 2019-12-13 | 2019-12-13 | Method for controlling insertion depth of small square billet submerged nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111036871B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114769543A (en) * | 2022-04-19 | 2022-07-22 | 重庆钢铁股份有限公司 | Method for observing liquid level height of tundish |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012020293A (en) * | 2010-07-12 | 2012-02-02 | Kobe Steel Ltd | Method for changing immersion depth of immersion nozzle |
| CN102513515A (en) * | 2011-12-20 | 2012-06-27 | 秦皇岛首秦金属材料有限公司 | Method for automatically changing slag line of tundish submersed nozzle for ultra-thick plate blank casting machine |
| CN104759598A (en) * | 2015-03-18 | 2015-07-08 | 山东钢铁股份有限公司 | Method and device for submersed nozzle slag line of automatic adjusting slab caster |
| CN104785742A (en) * | 2014-01-16 | 2015-07-22 | 宝山钢铁股份有限公司 | Method for monitoring abnormal offset of nozzle inserting position of continuous casting tundish |
| CN107321949A (en) * | 2017-06-26 | 2017-11-07 | 日照宝华新材料有限公司 | Thin-slab caster becomes slag line method |
| CN108080593A (en) * | 2017-12-29 | 2018-05-29 | 日照钢铁控股集团有限公司 | The method for controlling high pulling rate sheet blank continuous casting level fluctuation |
| CN110202107A (en) * | 2019-06-21 | 2019-09-06 | 邯郸钢铁集团有限责任公司 | Tundish immersed nozzle immersion depth Automatic adjustment method |
-
2019
- 2019-12-13 CN CN201911284352.3A patent/CN111036871B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012020293A (en) * | 2010-07-12 | 2012-02-02 | Kobe Steel Ltd | Method for changing immersion depth of immersion nozzle |
| CN102513515A (en) * | 2011-12-20 | 2012-06-27 | 秦皇岛首秦金属材料有限公司 | Method for automatically changing slag line of tundish submersed nozzle for ultra-thick plate blank casting machine |
| CN104785742A (en) * | 2014-01-16 | 2015-07-22 | 宝山钢铁股份有限公司 | Method for monitoring abnormal offset of nozzle inserting position of continuous casting tundish |
| CN104759598A (en) * | 2015-03-18 | 2015-07-08 | 山东钢铁股份有限公司 | Method and device for submersed nozzle slag line of automatic adjusting slab caster |
| CN107321949A (en) * | 2017-06-26 | 2017-11-07 | 日照宝华新材料有限公司 | Thin-slab caster becomes slag line method |
| CN108080593A (en) * | 2017-12-29 | 2018-05-29 | 日照钢铁控股集团有限公司 | The method for controlling high pulling rate sheet blank continuous casting level fluctuation |
| CN110202107A (en) * | 2019-06-21 | 2019-09-06 | 邯郸钢铁集团有限责任公司 | Tundish immersed nozzle immersion depth Automatic adjustment method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111036871A (en) | 2020-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2683965C (en) | Method for continuously casting billet with small cross section | |
| CN111036871B (en) | Method for controlling insertion depth of small square billet submerged nozzle | |
| CN103192047A (en) | Automatic control system and control method for cooling water of crystallizer for novel continuous casting machine | |
| CN104759598A (en) | Method and device for submersed nozzle slag line of automatic adjusting slab caster | |
| CN105562630A (en) | Detection device and detection method for melting conditions of crystallizer mold fluxes | |
| CN101554650B (en) | Method for controlling online calibration of pulling-straightening roller gap under light pressure of bloom caster | |
| CN104785742B (en) | Method for monitoring abnormal offset of nozzle inserting position of continuous casting tundish | |
| CN110961590B (en) | Molten steel superheat degree-based automatic submerged nozzle slag line control method | |
| CN110202107A (en) | Tundish immersed nozzle immersion depth Automatic adjustment method | |
| CN114406227B (en) | Two-cooling-section water distribution operation method for small square billet continuous casting machine | |
| CN107824756B (en) | Steel control method more than a kind of slab caster tundish based on continuous temperature measurement | |
| CN201322613Y (en) | Slag blanket thickness measuring device for covering slag of continuous casting crystallizer | |
| CN105618700A (en) | Method for accurately positioning continuously cast blank outlier caused by gate replacement | |
| CN105855491A (en) | Steel plate blank sizing measurement method based on encoders | |
| CN103302253A (en) | Liquid level detection method and system | |
| US4573128A (en) | Digital method for the measurement and control of liquid level in a continuous casting mold | |
| DE102009057861A1 (en) | Device for detecting the flow and method therefor | |
| CN103862006B (en) | A kind of method of subcrack defect judging continuous casting steel billet | |
| CN112008048B (en) | Method for measuring slag discharge of continuous casting ladle | |
| CN208937146U (en) | Live zinc pot liquid level measuring device | |
| CN102974783B (en) | Continuous caster and automatic casting process for automatically casting billet pouring box | |
| CN218425480U (en) | Device for measuring immersion depth of immersion type water gap | |
| CN214583500U (en) | Device for measuring insertion depth of sleeve on line | |
| JP6160578B2 (en) | Method for determining surface cracks in continuous cast pieces | |
| KR101177813B1 (en) | Control Method for a Short Period Mold Level Hunting in Continuous Cast |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |