CN115213365A - Method for reducing non-fixed length of slab continuous casting machine tail casting - Google Patents
Method for reducing non-fixed length of slab continuous casting machine tail casting Download PDFInfo
- Publication number
- CN115213365A CN115213365A CN202210868470.4A CN202210868470A CN115213365A CN 115213365 A CN115213365 A CN 115213365A CN 202210868470 A CN202210868470 A CN 202210868470A CN 115213365 A CN115213365 A CN 115213365A
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- fixed length
- blank
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- 238000005266 casting Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009749 continuous casting Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000004513 sizing Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 3
- 235000008216 herbs Nutrition 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention belongs to the field of steelmaking continuous casting, and relates to a method for reducing non-fixed length of tail casting of a slab continuous casting machine.
Description
Technical Field
The invention belongs to the field of steelmaking continuous casting, and relates to a method for reducing non-fixed length of tail casting of a slab continuous casting machine.
Background
When the tail billet is not in a fixed length mode, namely a slab caster is at a continuous casting end point, the length of a cast billet cannot meet the planned fixed length, the part of the billet cannot be added to a current contract, the primary smelting rate index is influenced, and simultaneously, the billet is overstocked and the logistics are tense. Directly affects the per ton steel profit and the rolling mill capacity.
The traditional operation mode of the double-flow or multi-flow continuous casting machine is that when molten steel in a tundish is poured, two flows are stopped in a synchronous pull-down speed mode, namely when the molten steel in the tundish is poured out, the two flows are simultaneously stopped pouring, the lengths of the two flows are respectively cut to cause 0-4 non-fixed sizes (if the pouring length is just integral multiple of the planned fixed size, the two flows of tail blanks are not fixed sizes and 0, if the pouring length is cut, the tail block blanks cannot meet the shortest steel rolling furnace entering size and scrap steel is judged, the next 2 blanks are all cut to be non-fixed sizes, the two flows generate 4 non-fixed sizes at most, and the multi-flow pouring is analogized in the same way).
Disclosure of Invention
In view of the above, the present invention provides a method for reducing the non-fixed length of the tail casting of a slab caster, which solves the problem of how to reduce the non-fixed length of the tail billet, ensures the casting length of the casting billet to be fixed length to the maximum extent, improves the rolling contract conversion rate, and reduces the loss of non-planned products.
In order to achieve the purpose, the invention provides the following technical scheme: a method for reducing non-fixed length of cast tail of a slab continuous casting machine comprises the following steps:
s1, when pouring of a ladle is finished, recording the counting length L of the sizing and tracking system at the moment 0 To obtain the length L of a cast blank which is cast but not cut at present Pouring ，L Pouring ＝L C +L Cutting machine +L 0 Wherein L is C : crystallizer to sector end roll, i.e. casting machine length, L Cutting machine : the length from the fan-shaped section tail roller to the zero point of the cutting vehicle;
s2, when the length of the flow pouring is just up to L Pouring /L 0 At integer multiples, the stream is taken as a stop-watering treatment, wherein L Pouring : a flow has been poured to length;
and S3, controlling the other flow to reduce the pulling speed in advance and terminate, and continuously pouring to the tundish to stop pouring.
Optionally, the casting machine is stopped by three or more streams by the method, and only the last stream is left for controlling the size of the tail casting.
Optionally, if the sum of the total lengths of the first casting blank from last to last and the second casting blank is greater than L 0 But less than 2L 0 When is L 0 ≤(L Closing box Poured total length) is less than or equal to 2L 0 Wherein L is Closing box The total pouring length is calculated by the system according to the weight of the molten steel in the furnace, the section size of the casting machine.
Optionally, if a casting blank is cut according to the L fixed length, the remaining size meets the rolling requirement, and the blank can be cut according to a fixed length and a non-fixed length; if one casting blank is cut according to the L fixed length, the rest size can not meet the rolling requirement, and the two casting blanks can be cut according to the non-fixed length average; if the average cut cannot meet the rolling requirements, the cut is executed according to a fixed length and a non-fixed length, and the non-fixed length is used as waste for disposal.
The invention has the beneficial effects that: the invention relates to a method for reducing non-fixed length of tail casting of a slab continuous casting machine, which is characterized in that when pouring tundish molten steel, the casting length of a certain flow is calculated to match the planned fixed length through pulling speed control, the casting end point is determined to be accurately stopped, the flow is ensured not to generate non-fixed length, and the other flow is continuously poured until the tundish molten steel is completely poured, so that the purposes of not increasing the residual steel amount of the tundish and reducing the non-fixed length count of a tail billet are achieved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
In the concrete embodiment, according to the method,
defining:
according to the weight of the molten steel in the furnace and the section size of the casting machine, the total pouring length is calculated by a system: l is Combination of Chinese herbs ；
L Pouring : a stream has been cast to length;
L C : the length from the crystallizer to the last roll of the sector section, namely the length of the casting machine;
L cutting machine : the length from the fan-shaped section tail roller to the zero point of the cutting vehicle;
L 0 : length (= L) counted by fixed-length tracking system Stator )；
By measuring the poured length L of a certain flow Pouring Matching the cutting plan length L to length Pouring ＝L C +L Cutting machine +L 0 .., when L is Pouring /L Stator When the integral relation is obtained, the non-fixed length blank is not generated, and the steel flow is closed.
The method specifically comprises the following steps:
1. when the pouring of the ladle is finished, recording the L at the moment 0 Length, obtaining the length L of a cast blank which is cast but not cut at the present time Pouring ，L Pouring ＝L C +L Cutting machine +L 0 ；
2. When the length of the flow pouring is just up to L Pouring /L Stator When the integral multiple is reached, the flow is subjected to pouring stopping treatment;
3. and controlling the other flow to reduce the pulling speed and terminate in advance, and continuously pouring to the tundish to stop pouring.
Stopping casting by adopting the method by using a casting machine with three or more streams, and only leaving the last stream as tail casting size control; if the sum of the total lengths of the first casting blank from last to last and the second casting blank is more than L Stator But less than 2L Stator When is L Stator ≤(L Closing box Poured total length) is less than or equal to 2L Stator ：
3.1 if according to L Stator And cutting a casting blank, wherein the remaining size meets the rolling requirement, and the cutting can be carried out according to a fixed length and a non-fixed length.
3.2 if according to L Stator Cutting one casting blank, wherein the remaining size cannot meet the rolling requirement, and cutting the casting blank averagely according to two non-fixed sizes; if the average cut cannot meet the rolling requirements, it is performed as 3.1, and waste disposal is done non-to-scale.
The invention provides a formula for accurately measuring and calculating the casting length of the casting flow, and the formula can directly guide the cutting of a blank; pouring the molten steel in the tundish by double flows at different pulling speed strategies, so that the differential control of the pouring length can be realized, and the increase of the residual steel amount of the tundish is not caused; and ensuring that all the first-class blanks are planned to be sized, and reducing the total number of the non-sized blanks.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (4)
1. A method for reducing non-fixed length of tail casting of a slab continuous casting machine is characterized by comprising the following steps:
s1, when pouring of a ladle is finished, recording the counting length L of the sizing and tracking system at the moment 0 To obtain the length L of a cast blank which is cast but not cut at present Pouring ，L Pouring ＝L C +L Cutting machine +L 0 ，
Wherein L is C : crystallizer to sector end roll, i.e. casting machine length, L Cutting machine : the length from the fan-shaped section tail roller to the zero point of the cutting vehicle;
s2, when the length of the flow pouring is just up to L Pouring /L 0 When the integral multiple is reached, the flow is subjected to pouring stop treatment,
wherein L is Pouring : a stream has been cast to length;
and S3, controlling the other flow to reduce the pulling speed in advance and terminate, and continuously pouring to the tundish to stop pouring.
2. The method of reducing slab caster trail casting non-sizing as claimed in claim 1, wherein: and (4) stopping pouring by the casting machine with three or more streams by adopting the method, and only leaving the last stream for controlling the size of the tail pouring.
3. The method for reducing the tail casting non-sizing of the slab caster as set forth in claim 2, wherein: if the sum of the total lengths of the first casting blank from last to last and the second casting blank is more than L 0 But less than 2L 0 When is L 0 ≤(L Combination of Chinese herbs Poured to total length) is less than or equal to 2L 0 ，
Wherein L is Closing box The total pouring length is calculated by the system according to the weight of the molten steel in the furnace, the section size of the casting machine.
4. The method of reducing slab caster trail casting non-sizing as claimed in claim 3, wherein: if a casting blank is cut according to the L fixed length, the rest size meets the rolling requirement, and the blank can be cut according to a fixed length and a non-fixed length;
if one casting blank is cut according to the L fixed length, the rest size can not meet the rolling requirement, and the two casting blanks can be cut according to the non-fixed length average;
if the average cut cannot meet the rolling requirements, the cut is executed according to a fixed length and a non-fixed length, and the non-fixed length is used as waste for disposal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210868470.4A CN115213365B (en) | 2022-07-22 | 2022-07-22 | Method for reducing tail casting non-fixed length of slab continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210868470.4A CN115213365B (en) | 2022-07-22 | 2022-07-22 | Method for reducing tail casting non-fixed length of slab continuous casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115213365A true CN115213365A (en) | 2022-10-21 |
| CN115213365B CN115213365B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210868470.4A Active CN115213365B (en) | 2022-07-22 | 2022-07-22 | Method for reducing tail casting non-fixed length of slab continuous casting machine |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2055806A1 (en) * | 1969-08-25 | 1971-04-30 | Inst Avtom | Automatic ingot cutting means for multi-line |
| JPH0775862A (en) * | 1993-09-06 | 1995-03-20 | Nippon Steel Corp | Cutting method of missing cast slab in multi-bar continuous casting and control device therefor |
| JP2000317583A (en) * | 1999-05-07 | 2000-11-21 | Nippon Steel Corp | Casting control method in billet continuous casting equipment |
| JP2003170247A (en) * | 2001-12-10 | 2003-06-17 | Nippon Steel Corp | Method for stopping molten steel injection into strand in continuous casting |
| CN104308138A (en) * | 2014-11-14 | 2015-01-28 | 北京首钢自动化信息技术有限公司 | Casting end-point control device and method thereof based on multiple fixed lengths and multiple strands |
| CN105478701A (en) * | 2015-12-21 | 2016-04-13 | 北京首钢自动化信息技术有限公司 | Automatic pouring stopping control method for double-flow plate blank |
| CN114713784A (en) * | 2022-04-26 | 2022-07-08 | 承德建龙特殊钢有限公司 | Continuous casting tail billet sizing optimization cutting method |
-
2022
- 2022-07-22 CN CN202210868470.4A patent/CN115213365B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2055806A1 (en) * | 1969-08-25 | 1971-04-30 | Inst Avtom | Automatic ingot cutting means for multi-line |
| JPH0775862A (en) * | 1993-09-06 | 1995-03-20 | Nippon Steel Corp | Cutting method of missing cast slab in multi-bar continuous casting and control device therefor |
| JP2000317583A (en) * | 1999-05-07 | 2000-11-21 | Nippon Steel Corp | Casting control method in billet continuous casting equipment |
| JP2003170247A (en) * | 2001-12-10 | 2003-06-17 | Nippon Steel Corp | Method for stopping molten steel injection into strand in continuous casting |
| CN104308138A (en) * | 2014-11-14 | 2015-01-28 | 北京首钢自动化信息技术有限公司 | Casting end-point control device and method thereof based on multiple fixed lengths and multiple strands |
| CN105478701A (en) * | 2015-12-21 | 2016-04-13 | 北京首钢自动化信息技术有限公司 | Automatic pouring stopping control method for double-flow plate blank |
| CN114713784A (en) * | 2022-04-26 | 2022-07-08 | 承德建龙特殊钢有限公司 | Continuous casting tail billet sizing optimization cutting method |
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| Publication number | Publication date |
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| CN115213365B (en) | 2024-01-23 |
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