CN111069554A - Online thermal width adjusting method for continuous casting chamfering crystallizer - Google Patents
Online thermal width adjusting method for continuous casting chamfering crystallizer Download PDFInfo
- Publication number
- CN111069554A CN111069554A CN201911283077.3A CN201911283077A CN111069554A CN 111069554 A CN111069554 A CN 111069554A CN 201911283077 A CN201911283077 A CN 201911283077A CN 111069554 A CN111069554 A CN 111069554A
- Authority
- CN
- China
- Prior art keywords
- width
- chamfering
- crystallizer
- width adjustment
- chamfering crystallizer
- 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.)
- Granted
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
- B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention relates to an online thermal width adjusting method for a continuous casting chamfering crystallizer, and belongs to the technical field of continuous casting in the metallurgical industry. The technical scheme of the invention is as follows: the method comprises the improvement of equipment of a first foot-discharging roller of the chamfering crystallizer, the improvement of an online thermal width-adjusting process of the chamfering crystallizer and the technical requirements of width adjustment during abnormal continuous casting operations such as quick tundish change, different steel grade change and the like. The invention has the beneficial effects that: the method can avoid the longitudinal crack defect of the corner of the casting blank and the risk of steel leakage accidents when the chamfering crystallizer is subjected to online width thermal adjustment, and solves the technical problem that the chamfering crystallizer cannot be subjected to online width thermal adjustment.
Description
Technical Field
The invention relates to an online thermal width adjusting method for a continuous casting chamfering crystallizer, and belongs to the technical field of continuous casting in the metallurgical industry.
Background
In the metallurgical steelmaking continuous casting industry, the requirements of users on the width of a slab are various, so that the width of a chamfering crystallizer needs to be adjusted according to the requirements of the users. If the width adjustment of the plate blank is realized by adopting the method of replacing the chamfering crystallizer, the number of the chamfering crystallizers needs to be increased, the time for replacing the chamfering crystallizers is longer, and the productivity and the benefit of a steel mill are influenced. Therefore, in order to improve the operation efficiency of the continuous casting machine and meet the requirements of various customers on multi-specification and small-batch production, the width and the taper of a casting blank need to be changed in the casting process, namely, the online thermal width adjustment of the chamfering crystallizer is realized. The chamfering crystallizer is subjected to on-line hot high-speed width adjustment, and the width adjustment can be carried out without reducing the pulling speed, so that the hot-state width adjustment time of the chamfering crystallizer is greatly shortened, the cutting waste of a wedge-shaped blank caused by width adjustment is reduced, and the production efficiency and the benefit can be greatly improved. However, excessive extrusion of the narrow edge on the casting blank in the process of width thermal adjustment of the continuous casting chamfering crystallizer can generate casting blank defects such as cracks, or the air gap between the narrow edge and the casting blank is too large to influence the solidification and uniformity of the blank shell, and serious production accidents such as bulging steel leakage or adhesive steel leakage can be caused in serious cases. Especially for the continuous casting chamfering crystallizer, because the casting blank at the corner part is cooled more weakly, the longitudinal crack defect and steel leakage accident risk of the corner part of the casting blank are more easily generated, so the online thermal width adjustment of the chamfering crystallizer becomes a difficult problem and a taboo of the continuous casting industry, and even a plurality of steel plants think that the online thermal width adjustment of the chamfering crystallizer is impossible.
Disclosure of Invention
The invention aims to provide an online thermal width adjusting method for a continuous casting chamfering crystallizer, which can avoid the longitudinal crack defect and steel leakage accident risk of the corner of a casting blank when the chamfering crystallizer is subjected to online thermal width adjustment by improving the control of clamping steel at the corner of the chamfering crystallizer and the cooling and supporting aspects of strengthening the narrow surface of the casting blank, solve the technical problem that the chamfering crystallizer cannot be subjected to online thermal width adjustment, and effectively solve the problems in the background technology.
The technical scheme of the invention is as follows: a method for on-line thermal width adjustment of a continuous casting chamfering crystallizer is characterized in that equipment improvement of a first row foot roller of the chamfering crystallizer is carried out; the improvement of the online thermal width adjusting process of the chamfering crystallizer; adjusting the width of the tundish during quick change or different steel grade change operation;
the equipment improvement of the first foot roller row of the chamfering crystallizer comprises that ① chamfering foot roller inclined plane edges and a copper plate inclined plane are on the same plane, the deviation is less than 1.5mm, the center line of ② chamfering foot rollers and the center line of the copper plate are on the same straight line, the centering precision is within 0.5mm, the gap between ③ chamfering foot rollers and wide-face foot rollers is 2.5-3.5mm, the angle deviation of the copper plate chamfering foot rollers is within 1.5 degrees, ④ chamfering foot rollers can axially move by 5-8 mm left and right and are in a free floating state to realize axial automatic centering, and zero-pair arc is formed between ⑤ chamfering foot rollers and the copper plate, and the precision is within 0.2 mm.
The improvement of the online thermal width adjusting process of the chamfering crystallizer comprises the following steps:
① the online thermal width adjustment mode of the chamfering crystallizer adopts an S mode, the water spray quantity of a ② narrow face foot roller is increased by 15-30%, 2 types of narrow face nozzles are adopted, the upper surface of the flow is large, the lower surface of the flow is small, ③ checks the corner gap of the chamfering crystallizer and cleans foreign matters at the corner, the corner gap at the upper opening of a copper plate is less than 0.3mm, the corner gap at the lower opening of the copper plate is less than 0.45mm, the gap value of an insert plate is within 1.3mm, the superheat degree in the ④ width adjustment process is within 15-30 ℃, the width adjustment pulling speed is within 0.8-1.2m/min, the width adjustment quantity at one time of ⑤ is less than 100mm, the width adjustment quantity is more than 100mm, and the next width adjustment can be carried out after the width adjustment at the previous time is carried out, and the width adjustment can be carried out after the.
The width adjustment during the quick change of the tundish or the change of the different steel types comprises ① adjusting the width before changing the tundish or the different steel types, changing the tundish or the different steel after the width adjustment is normal, and ② adjusting the width after changing the tundish or the different steel, so that the width adjustment can be carried out only when the pouring length of the flow changing ladle is not less than 10 meters and the pulling speed is not less than 0.8 m/min.
Calculation method and calculation result of hydrostatic pressure resultant action point of molten steel on narrow side of chamfering crystallizer and online width-adjusting thrust resultant action point of chamfering crystallizer
The position of the action point of the hydrostatic pressure of the molten steel on the narrow side of the chamfering crystallizer can be obtained
I.e. at 2/3L from the chamfered mould meniscus
The position of the action point of the thrust Fs of the whole narrow-edge copper plate to the blank shell can be obtained
While
The result shows that the action point of the hydrostatic pressure resultant force of molten steel on the narrow side of the chamfering crystallizer and the action point of the online width-adjusting thrust resultant force of the chamfering crystallizer are almost at the same action point, namely in the central line area of the first foot roller of the chamfering crystallizer.
The invention has the beneficial effects that: the control of the chamfer crystallizer corner steel clamping and the cooling and supporting of the narrow surface of the reinforced casting blank are improved, so that the longitudinal crack defect and steel leakage accident risk of the casting blank corner can be avoided when the chamfer crystallizer is subjected to online thermal width adjustment, and the technical problem that the chamfer crystallizer cannot be subjected to online thermal width adjustment is solved.
Drawings
FIG. 1 shows the hydrostatic pressure F of molten steel on the narrow side of the chamfering crystallizer according to the present inventionQuietA schematic diagram;
FIG. 2 is a schematic diagram showing the distribution of the hydrostatic pressure load of molten steel on the narrow side of the chamfered crystallizer according to the present invention;
FIG. 3 is a schematic diagram of the acting point of the online width-adjusting thrust resultant of the chamfering crystallizer according to the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
The method comprises the equipment improvement of a first row of foot rollers of the chamfering crystallizer, the improvement of the online thermal width adjustment process of the chamfering crystallizer, and the width adjustment during abnormal continuous casting operations such as quick tundish change or different steel grade change.
The improvement of the first foot-discharging roller of the chamfering crystallizer comprises
① the deviation of the bevel edge of the chamfer foot roller and the bevel of the copper plate is less than 1.5mm, the central line of the ② chamfer foot roller and the central line of the copper plate are on the same straight line, the centering precision is within 0.5mm, the gap between the ③ chamfer foot roller and the wide foot roller is within 2.5-3.5mm, the angle deviation of the chamfer copper plate foot roller is within 1.5 degrees, the ④ chamfer foot roller can axially move 5-8 mm left and right, and is in a free floating state to realize axial automatic centering, and the zero-to-zero arc alignment between the ⑤ chamfer foot roller and the copper plate is within 0.2 mm.
The improvement of the on-line thermal width adjusting process of the chamfering crystallizer comprises
① the online thermal width adjustment mode of the chamfering crystallizer adopts an S mode, the water spray quantity of a ② narrow face foot roller is increased by 15-30%, the narrow face nozzles adopt 2 types, the flow rate is large above and small below, ③ checks the corner gap of the chamfering crystallizer and cleans foreign matters at the corner, the corner gap at the upper opening of a copper plate is ensured to be less than 0.3mm, the corner gap at the lower opening of the copper plate is less than 0.45mm, the gap value of an insert plate is within 1.3mm, the superheat degree in the width adjustment process of ④ is within 15-30 ℃, the width adjustment pulling speed is within 0.8-1.2m/min, the width adjustment quantity at one time of ⑤ is less than 100mm, the width adjustment quantity is more than 100mm, and the next width adjustment can be carried out after the width adjustment at the previous time is carried out, and the next width adjustment can be carried out after the length of the lower.
The width adjustment during abnormal continuous casting operations such as quick tundish change or different steel grade change comprises ① adjusting the width before changing the tundish or different steel grade, changing the tundish or different steel after the width adjustment is normal, and the width adjustment can be performed only when the tundish or different steel is changed and the pouring length is not less than 10 meters and the pulling speed is not less than 0.8m/min by ② adjusting the width after changing the tundish or different steel.
Calculation method and calculation result of hydrostatic pressure resultant action point of molten steel on narrow side of chamfering crystallizer and online width-adjusting thrust resultant action point of chamfering crystallizer
The position of the action point of the hydrostatic pressure of the molten steel on the narrow side of the chamfering crystallizer can be obtained
I.e. at 2/3L from the chamfered mould meniscus
The position of the action point of the thrust Fs of the whole narrow-edge copper plate to the blank shell can be obtained
While
The result shows that the action point of the hydrostatic pressure resultant force of the molten steel on the narrow side of the chamfering crystallizer and the action point of the online width-adjusting thrust resultant force of the chamfering crystallizer are almost at the same action point.
The precondition of safe production in the process of heat width adjustment of the chamfering crystallizer is to avoid the occurrence of steel leakage accidents. Because the blank shell temperature and thickness of the edge part of the chamfering crystallizer are different from those of a normal right-angle crystallizer, the chamfering crystallizer is more sensitive to the change of taper and width in the online thermal width adjustment process and is more prone to generating angle crack bleed-out; in addition, because the area of the chamfer surface of the chamfer crystallizer is increased, the wide and narrow surface angle gaps of the chamfer crystallizer are easier to clamp steel; the requirements for narrow surface support and cooling of the chamfer crystallizer are higher due to the change of the shape of the narrow surface of the casting blank (the shape of the narrow surface is changed from one surface to three surfaces). Therefore, the factors of the online thermal width adjustment technology of the chamfering crystallizer are firstly considered to avoid the surface quality gap of the casting blank (such as surface crack, narrow edge bulging, collapse and the like) and ensure the safe production (such as avoiding the steel leakage accident caused by corner crack), so the technology mainly solves the problems of the prior art from two aspects of controlling the corner steel clamping of the chamfering crystallizer and enhancing the cooling and supporting of the narrow surface of the casting blank.
1. The improvement of a first foot-arranging roller on the narrow surface of the chamfering crystallizer;
1) calculating the action point of hydrostatic pressure resultant force of molten steel on the narrow side of the chamfering crystallizer: the ferrostatic pressure Fz is pgh Δ h B, as shown in fig. 1,
p is the molten steel density, deltah is the minute height from the meniscus h, B is the width of the narrow side of the chamfered crystallizer,
the micro integral of the formula is used for obtaining the magnitude of the static pressure resultant force of the molten steel at the narrow side of the chamfering crystallizer
2) Load calculation for linear distribution of hydrostatic pressure of molten steel at narrow side of the chamfering crystallizer: as shown in figure 2 of the drawings, in which,
according to the moment balance theorem, the moment generated by the hydrostatic pressure of molten steel on the narrow side is balanced with the supporting moment of the narrow side on the blank shell. The position of the action point of the resultant force of the hydrostatic pressure (narrow side supporting force) of the molten steel, namely the position 2/3L away from the meniscus of the chamfered crystallizer
L can be regarded as the extension length of the effective length L' of the chamfering crystallizer. The length of the copper plate of the chamfer crystallizer is 900mm, the total length of the narrow-side foot rollers is 580mm from the lower edge of the copper plate to the outer diameter of the last row of foot rollers, the distance from the upper edge of the copper plate to the meniscus is 80-120mm, L is 1380mm, and the action point 2/3L of the ferrostatic pressure is 920mm, and almost passes through the center of the narrow-side first row of foot rollers in the resultant force direction.
3) Calculating the acting point of the online width-adjusting thrust resultant force of the chamfering crystallizer: as shown in figure 3 of the drawings,
the on-line width adjusting process of the chamfering crystallizer is a width adjusting process which is completed by a narrow-edge copper plate and a foot roller together, namely, no narrow adjustment or width adjustment is carried out, and the width adjustment is obtained according to theoretical calculation
Action point of Fs of thrust of the entire narrow-side copper plate on the blank shell:
while
Almost in the same point of action-still in the region of the foot roll centreline.
Therefore, the theoretical analysis shows that the first foot-removing roller on the narrow surface of the chamfering crystallizer is the key point of the chamfering crystallizer and the width adjustment equipment of the chamfering crystallizer. Therefore, the equipment for chamfering the first foot-discharging roller on the narrow surface of the crystallizer is improved as follows:
① the first pair of foot rollers must be transformed into chamfer type foot rollers, the chamfer shape matches with the chamfer slab shape, the edge of the chamfer foot roller inclined plane and the copper plate inclined plane should be on the same plane, and the deviation should be less than 1.5 mm.
② the chamfer foot roller must ensure the centering in the width direction, namely the central line of the chamfer roller and the central line of the copper plate are on a straight line, and the centering precision is required to be within 0.5 mm.
③ the gap between the chamfer angle foot roller and the wide surface foot roller is 2.5-3.5mm, and the angle deviation between the chamfer angle copper plate and the foot roller is within 1.5 degrees.
④ the chamfering foot roller can axially move by 5-8 mm, so that the chamfering roller is in a floating state in production to realize axial self-centering.
⑤ the arc between the chamfering foot roller and the copper plate is controlled within 0.2mm by adopting a zero-to-zero mode.
2. The improvement of the online thermal width adjusting process of the chamfering crystallizer;
① the online thermal width adjustment mode of the chamfering crystallizer adopts an S mode, because the S mode width adjustment is continuous taper width adjustment operation, the deformation force on the casting blank shell is small, and the copper plate abrasion can be reduced.
② the water spraying amount of the narrow-face foot roller is increased by 15-30%, and the narrow-face nozzles adopt 2 types with large upper part and small lower part of the flow.
③ the wide side is opened when the crystallizer is stopped or repaired at the next time, the special cleaning tool is used to clean the sundries on the matching position completely until no foreign matter exists, the angle gap is less than 0.3mm after the wide plate and the narrow plate are matched, the angle gap is less than 0.45mm at the lower opening of the copper plate, and the gap value of the insert plate is within 1.3 mm.
④, the superheat degree and the width-adjusting drawing speed of molten steel are strictly controlled, due to the growth characteristics of the chamfered edge blank shell, the excessively high superheat degree and the width-adjusting drawing speed can cause the blank shell to be thin and increase the steel leakage risk, and the excessively low superheat degree and the width-adjusting drawing speed can accelerate the surface shrinkage of the blank shell to cause the angle change of the chamfered edge blank shell to be large and be not beneficial to width adjustment, so the superheat degree in the width-adjusting process is generally within 15-30 ℃, and the width-adjusting drawing speed is generally within 0.8-1.2 m/min;
⑤, the single-time width adjustment amount is less than or equal to 100mm, the width adjustment amount is more than 100mm, the width adjustment needs to be carried out for multiple times, and after the width adjustment for the previous time, the width adjustment for the next time can be carried out after the casting blank is discharged from the lower opening of the chamfering crystallizer by more than 2 meters.
⑥, performing online quality inspection on the width-adjusted blank, stopping subsequent width adjustment if the chamfer surface has cracks or bulges, and inspecting the chamfer crystallizer;
3. width adjustment requirement of abnormal casting:
① when a plan for changing the ladle or changing the width of the different steel is available, the width is adjusted before changing the ladle or the different steel, and the ladle or the different steel is changed after the width is adjusted normally;
② if the width needs to be adjusted after changing the ladle or the different steel for other reasons, the width can be adjusted only when the pulling speed is not lower than 0.8m/min and meets the requirement of on-line width adjustment after the ladle is changed and the casting is carried out for 10 m.
The invention is further illustrated by the following examples.
Example 1
A method for automatically detecting the width of a 3 rd furnace slab of a continuous casting machine in the factory is a chamfered crystallizer, the width of the 3 rd furnace slab of the production plan is adjusted from 1350mm to 1200mm before continuous casting production starts, the equipment function precision of the chamfered crystallizer and the equipment function precision of a hydraulic width adjustment control system are detected according to a conventional operation maintenance manual, the equipment function precision of the chamfered crystallizer is mainly detected except the detection according to the conventional operation maintenance manual, the center line of a ① chamfered foot roller inclined plane and the center line of a copper plate inclined plane are on the same plane, the deviation is smaller than 1.5mm, the center line of a ② chamfered foot roller and the center line of a wide surface foot roller are on the same straight line, the centering precision is within 0.5mm, the gap between a ③ chamfered foot roller and the wide surface foot roller is 2.5-3.5mm, the angular deviation of the chamfered copper plate and the foot roller is within 1.5 degrees, the chamfered foot roller can move left and right axially by 5-8 mm, the chamfered foot roller is in a free floating state, zero opposite arc is in a ⑤ foot roller, the gap between the precision is within 0.2mm, the gap between the clearance adjustment of the clearance between the clearance of the smooth copper plate and the copper plate, the copper plate is detected, the clearance between the clearance of the copper plate, the copper plate is detected, the corner width adjustment of the copper plate, the copper plate is detected, the copper plate width adjustment, the steel plate width adjustment is detected, the steel plate width adjustment angle adjustment is detected, the steel plate width of the steel plate after the steel plate width of a small casting blank after the first time, the width adjustment of a second casting process is finished, the width adjustment angle of a second casting process is finished, the width adjustment mode, the width adjustment of a steel plate after the steel plate width adjustment of a steel plate width adjustment, the steel plate width adjustment of a steel plate is finished, the steel.
Example 2
A method for detecting the width of a continuous casting machine No. 2 in the factory is a chamfering crystallizer, a production plan continuous casting furnace No. 2 produces steel grade which is converted from low-carbon steel to ultra-low-carbon IF steel (dissimilar steel grade), the width of a slab is adjusted to 1200mm from 1250mm, before continuous casting production starts, the equipment function precision of the chamfering crystallizer and the equipment function precision of a hydraulic width adjusting control system are detected, the equipment function precision of the hydraulic width adjusting control system is detected according to a conventional operation maintenance manual, except for the detection according to the conventional operation maintenance manual, the following contents are mainly detected, the edge of the inclined plane of a ① chamfering foot roller and the inclined plane of a copper plate are on the same plane, the deviation is less than 1.5mm, the center line of the ② chamfering foot roller and the center line of the copper plate are on the same straight line, the centering precision is within 0.5mm, the gap between the ③ chamfering foot roller and a wide surface foot roller is 2.5-3.5mm, the angle deviation of the chamfering foot roller and the copper plate and the angle is within 1.5 degrees, the angle deviation of the ④ chamfering foot roller can move left and right and left and right axially by 5mm, the angle, the steel plate can be in a free floating state, the gap between the zero, the gap between the intermediate steel plate and the gap between the intermediate steel plate, the copper plate, the gap is detected, the gap between the copper plate is detected, the normal casting speed adjusting furnace width adjusting mode, the gap of a normal casting process is detected, the casting process is performed when the temperature of a casting process is performed, the gap of a process is performed when the gap of a normal casting process of a casting process of a continuous casting machine, the casting process of a continuous casting machine, the casting process.
Claims (3)
1. A method for online thermal width adjustment of a continuous casting chamfering crystallizer is characterized by comprising the following steps:
the equipment improvement of a first foot-discharging roller of the chamfering crystallizer; the improvement of the online thermal width adjusting process of the chamfering crystallizer; adjusting the width of the tundish during quick change or different steel grade change operation;
the equipment improvement of the first foot-discharging roller of the chamfering crystallizer comprises:
the edge of the bevel of the chamfering foot roller and the bevel of the copper plate are on the same plane, and the deviation is less than 1.5 mm;
center line of the chamfering foot roller andthe central line of the copper plate is on a straight line, and the centering precision is within 0.5 mm;
the gap between the chamfer foot roller and the wide foot roller is 2.5-3.5 mm; the angular deviation of the foot roller of the chamfer copper plate is within 1.5 degrees;
the chamfering foot roller can axially move 5-8 mm left and right and is in a free floating state to realize axial automatic centering;
zero-to-zero arc alignment is carried out between the chamfering foot roller and the copper plate, and the precision is within 0.2 mm.
2. The method for the on-line thermal width modulation of the continuous casting chamfering crystallizer according to claim 1, wherein the improvement of the on-line thermal width modulation process of the chamfering crystallizer comprises:
the online thermal width adjusting mode of the chamfering crystallizer adopts an S mode;
the water spraying amount of the narrow-face foot roller is increased by 15-30%; the narrow-face nozzles adopt 2 types, and the upper part of the flow is larger and the lower part of the flow is smaller;
checking a corner gap of the chamfering crystallizer and cleaning foreign matters at the corner to ensure that the corner gap at the upper opening of the copper plate is less than or equal to 0.3 mm; the angle seam of the lower opening of the copper plate is less than or equal to 0.45 mm; the board inserting clearance value is within 1.3 mm;
the superheat degree in the width adjusting process is within 15-30 ℃; adjusting the width and the pulling speed within 0.8-1.2 m/min;
the single width adjustment amount is less than or equal to 100mm, the width adjustment amount is more than 100mm, the width adjustment needs to be carried out for multiple times, and after the width adjustment for the last time, the width adjustment can be carried out for the next time after the casting blank is discharged from the lower opening of the chamfering crystallizer by the length of more than 2 meters.
3. The method for the on-line thermal width adjustment of the continuous casting chamfering crystallizer according to claim 1, wherein the width adjustment when the tundish is quickly replaced or the different steel grades are changed comprises the following steps:
adjusting the width before changing the ladle or the different steel types, and changing the ladle or the different steel after the width is adjusted normally;
and after the ladle change or the special steel adjustment, the width can be adjusted only when the pouring length of the flow ladle change is not less than 10 meters and the pulling speed is not less than 0.8 m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911283077.3A CN111069554B (en) | 2019-12-13 | 2019-12-13 | Online thermal width adjusting method for continuous casting chamfering crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911283077.3A CN111069554B (en) | 2019-12-13 | 2019-12-13 | Online thermal width adjusting method for continuous casting chamfering crystallizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111069554A true CN111069554A (en) | 2020-04-28 |
| CN111069554B CN111069554B (en) | 2021-07-23 |
Family
ID=70314421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911283077.3A Active CN111069554B (en) | 2019-12-13 | 2019-12-13 | Online thermal width adjusting method for continuous casting chamfering crystallizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111069554B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020555A (en) * | 2021-02-07 | 2021-06-25 | 首钢集团有限公司 | On-line width adjusting method for plate blank of chamfering crystallizer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693290A (en) * | 2007-06-28 | 2010-04-14 | 上海宝信软件股份有限公司 | On-line width adjusting method of cystallizer |
| CN104057052A (en) * | 2014-07-04 | 2014-09-24 | 秦皇岛首秦金属材料有限公司 | Continuous casting technology suitable for chamfering crystallizer stable production |
| CN105414512A (en) * | 2015-11-26 | 2016-03-23 | 首钢京唐钢铁联合有限责任公司 | Control method of transverse corner cracks of casting blank of chamfering crystallizer |
| CN105983674A (en) * | 2015-02-28 | 2016-10-05 | 宝山钢铁股份有限公司 | Automatic on-line width adjustment control system for continuous casting and process control method |
| CN107803476A (en) * | 2017-11-30 | 2018-03-16 | 攀钢集团西昌钢钒有限公司 | Conical degree of crystallizer adjusts width controlling method |
-
2019
- 2019-12-13 CN CN201911283077.3A patent/CN111069554B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693290A (en) * | 2007-06-28 | 2010-04-14 | 上海宝信软件股份有限公司 | On-line width adjusting method of cystallizer |
| CN104057052A (en) * | 2014-07-04 | 2014-09-24 | 秦皇岛首秦金属材料有限公司 | Continuous casting technology suitable for chamfering crystallizer stable production |
| CN105983674A (en) * | 2015-02-28 | 2016-10-05 | 宝山钢铁股份有限公司 | Automatic on-line width adjustment control system for continuous casting and process control method |
| CN105414512A (en) * | 2015-11-26 | 2016-03-23 | 首钢京唐钢铁联合有限责任公司 | Control method of transverse corner cracks of casting blank of chamfering crystallizer |
| CN107803476A (en) * | 2017-11-30 | 2018-03-16 | 攀钢集团西昌钢钒有限公司 | Conical degree of crystallizer adjusts width controlling method |
Non-Patent Citations (1)
| Title |
|---|
| 俞学成等: "迁钢倒角结晶器的实践与应用", 《连铸》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020555A (en) * | 2021-02-07 | 2021-06-25 | 首钢集团有限公司 | On-line width adjusting method for plate blank of chamfering crystallizer |
| CN113020555B (en) * | 2021-02-07 | 2022-09-13 | 首钢集团有限公司 | On-line width adjusting method for plate blank of chamfering crystallizer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111069554B (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20070112879A (en) | A continuous casting and rolling method for medium plate | |
| CN106552831A (en) | A kind of manufacture method of Thin Specs hot-strip | |
| CN103831412B (en) | Production method for controlling straight crack defect of surface edge of medium-thick plate | |
| CN110961592B (en) | Method for controlling bleed-out in continuous casting of high-casting-speed sheet billet | |
| CN102323388B (en) | Judging method for causing reason of straight crack at edge of rolling plate | |
| CN107096795A (en) | A kind of manufacture method for reducing edge defects of hot rolled strip steel | |
| CN110802205A (en) | Control method and device for austenite grain size of continuous casting slab and product | |
| CN111069554A (en) | Online thermal width adjusting method for continuous casting chamfering crystallizer | |
| CN113275532A (en) | Method for preventing longitudinal crack bleed-out of continuous casting slab | |
| CN111761039A (en) | Longitudinal crack control process for wide slab | |
| CN109332614B (en) | Cooling control device and method for single-point non-equilibrium casting special-shaped blank crystallizer | |
| CN104057052A (en) | Continuous casting technology suitable for chamfering crystallizer stable production | |
| WO2022057925A1 (en) | Improving surface quality of twin roll cast and hot rolled thin strip steel | |
| TW202039115A (en) | Method for continuous casting of slab | |
| CN109261921B (en) | Method for prejudging medium and thin slab continuous casting bleed-out | |
| CN110052588B (en) | Microalloyed steel casting blank corner transverse crack control process and crystallizer | |
| CN113510226B (en) | Intelligent control device and method for real-time online correction of slab narrow-side defects | |
| JP4935383B2 (en) | Steel continuous casting method | |
| CN113333707B (en) | Method for casting rectangular blank in non-clamping section of R10-meter arc continuous casting machine | |
| WO2021175242A1 (en) | Boron-added steel and production method thereof | |
| CN114472835A (en) | Heat exchange operation method for wide and thick plate blank continuous casting tundish | |
| CN112893793A (en) | Method for controlling corner cracks of wide and thick plate arc-shaped continuous casting billet | |
| JPH06586A (en) | Method for continuously forging beam blank | |
| CN215965537U (en) | Device for preventing intermediate billet from impacting rough rolling roller way | |
| CN114871401A (en) | Method for rapidly treating casting blank stripping |
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 |