CN115213365B - Method for reducing tail casting non-fixed length of slab continuous casting machine - Google Patents
Method for reducing tail casting non-fixed length of slab continuous casting machine Download PDFInfo
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- CN115213365B CN115213365B CN202210868470.4A CN202210868470A CN115213365B CN 115213365 B CN115213365 B CN 115213365B CN 202210868470 A CN202210868470 A CN 202210868470A CN 115213365 B CN115213365 B CN 115213365B
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- length
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- 238000005266 casting Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009749 continuous casting Methods 0.000 title abstract description 11
- 238000005520 cutting process Methods 0.000 claims description 22
- 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
- 238000004513 sizing Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
-
- 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 the 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 tail casting non-fixed length of a slab continuous casting machine.
Background
When the tail blank is not fixed in length, namely the slab continuous casting machine is at the continuous casting end point, the length of the cast blank cannot meet the planned fixed length, the part of the blank cannot be honored with the current contract, the primary smelting rate index is affected, and meanwhile, the blank is backlogged and the logistics is tense. Directly affects the profit of ton steel and the productivity of rolling mill.
The traditional operation mode of the double-flow or multi-flow continuous casting machine is that when pouring ladle molten steel, two flows are terminated in a synchronous pull-down speed mode, namely, when pouring ladle molten steel is completed, the two flows are simultaneously terminated, the two flows are cut respectively to have lengths of 0-4 non-fixed lengths (if the lengths of the two flows are exactly integer times of the designed fixed lengths, the two flows of tail blanks are not fixed lengths are 0, if the lengths of the two flows are cut, the tail blanks cannot meet the shortest steel rolling charging size and scrap steel is judged, the two latter 2 blanks are cut into non-fixed lengths, and the two flows generate at most 4 non-fixed lengths, and the multi-flow pouring is similar).
Disclosure of Invention
In view of the above, the invention aims to provide a method for reducing the non-fixed length of the tail casting of a slab continuous casting machine, which solves the problem of how to reduce the non-fixed length of the tail casting, ensures the casting blank to be cast into a fixed length to the greatest extent, improves the rolling contract redemption rate and reduces the loss of non-planned products.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for reducing off-cut length of a slab caster comprising the steps of:
s1, when pouring of the big ladle is finished, recording the counting length L of the sizing tracking system at the moment 0 Obtaining the length L of a casting blank which is cast but not cut at present by a certain flow Pouring ，L Pouring ＝L C +L Cutting and cutting +L 0 Wherein L is C : from the mould to the end rolls of the sector, i.e. the length of the casting machine, L Cutting and cutting : the length from the end roller of the fan-shaped section to the zero point of the cutting vehicle;
s2, when the casting length of the flow just reaches L Pouring /L 0 At integer times, the stream is treated to stop casting, where L Pouring : a certain stream has been poured into length;
s3, controlling the other flow to drop in advance, pull out and end, and continuing pouring until the pouring box stops pouring.
Alternatively, the casting machine with more than three streams stops casting 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 and the second casting blank is larger than L 0 But less than 2L 0 When, i.e. L 0 ≤(L Closing device -total length poured is less than or equal to 2L 0 Wherein L is Closing device The system measures the total casting length according to the broken surface size of the casting machine according to the weight of the molten steel in the furnace.
Optionally, if a casting blank is cut according to the L-scale, the remaining size meets the rolling requirement, and the casting blank can be cut according to a fixed length and a non-fixed length; if one casting blank is cut according to the L, the left size can not meet the rolling requirement, and the casting blank can be cut according to two non-fixed-length average; if the average cutting cannot meet the rolling requirement, the method is carried out according to a fixed-length cutting and a non-fixed-length cutting, and the non-fixed-length waste is disposed.
The invention has the beneficial effects that: the invention relates to a method for reducing the non-fixed-length casting of a plate blank continuous casting machine, which calculates the casting length of a certain flow to match with the planned fixed-length casting length through pulling speed control when pouring molten steel, determines that the casting end point is accurately stopped, ensures that the flow does not generate the non-fixed-length casting, and continuously casts the other flow to the molten steel of the middle ladle to finish casting, thereby achieving the purposes of not increasing the amount of the middle ladle residual steel and reducing the number of the non-fixed-length casting of a tail blank.
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 objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
In a specific embodiment of the present invention,
definition:
according to the weight of the molten steel in the furnace, the total casting length is calculated by the system according to the broken surface size of the casting machine: l (L) Closing device ；
L Pouring : a certain stream has been poured into length;
L C : crystallizer to fan-shaped segment end roller, namely casting machine length;
L cutting and cutting : the length from the end roller of the fan-shaped section to the zero point of the cutting vehicle;
L 0 : length (=l) of the fixed-length tracking system Fixing device )；
By measuring the length L of a certain flow Pouring Matching the cut-to-length cutting plan length L Pouring ＝L C +L Cutting and cutting +L 0 .. when L Pouring /L Fixing device When the relation is integer, the non-fixed-length blank is not generated, and the steel flow is closed.
The method specifically comprises the following steps:
1. when pouring of the big ladle is finished, record the L at the moment 0 Length, obtain the length L of a casting blank which is cast but not cut at present by a certain flow Pouring ，L Pouring ＝L C +L Cutting and cutting +L 0 ；
2. When the casting length of the flow just reaches L Pouring /L Fixing device At integer times, the stream is stopped;
3. and controlling the other flow to drop in advance, pull out and end, and continuing pouring until the pouring box stops pouring.
Stopping casting by adopting the method, and only controlling the size of the last casting tail casting; if the sum of the total lengths of the first casting blank and the second casting blank is larger than L Fixing device But less than 2L Fixing device When, i.e. L Fixing device ≤(L Closing device -total length poured is less than or equal to 2L Fixing device ：
3.1 if according to L Fixing device Cutting a casting blank, and cutting according to a fixed length and a non-fixed length, wherein the rest size meets the rolling requirement.
3.2 if according to L Fixing device Cutting a casting blank, wherein the rest size cannot meet the rolling requirement, and the casting blank can be cut according to two non-fixed-length average; if the average cut cannot meet the rolling demand, the non-fixed-length scrap disposal is performed according to 3.1.
The invention provides an accurate calculation formula for casting length of casting flow, which directly guides blank cutting; the double-flow pouring ladle molten steel with different pull-speed strategies can realize the differential control of pouring length, and meanwhile, the increase of the final ladle residual steel quantity is not caused; ensure that all the first-class blanks are planned fixed-length, and reduce the total number of non-fixed-length blanks.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (1)
1. A method for reducing the tail casting non-sizing of a slab caster, comprising the steps of:
s1, when pouring of the big ladle is finished, recording the counting length L of the sizing tracking system at the moment 0 Obtaining the length L of a casting blank which is cast but not cut at present by a certain flow, L Pouring =L C +L Cutting and cutting +L 0 ，
Wherein L is C : from the mould to the end rolls of the sector, i.e. the length of the casting machine, L Cutting and cutting : the length from the end roller of the fan-shaped section to the zero point of the cutting vehicle;
s2, when the casting length of the flow just reaches L Pouring /L 0 When the flow is multiplied by an integer, the flow is stopped,
wherein L is Pouring : a certain stream has been poured into length;
s3, controlling the other flow to drop in advance, pull out and end, and continuing pouring until the pouring box stops pouring;
stopping casting by adopting the method, and only controlling the size of the last casting tail casting;
if the sum of the total lengths of the first casting blank and the second casting blank is larger than L 0 But less than 2L 0 When, i.e. L 0 ≤（L Closing device -total length poured is less than or equal to 2L 0 ，
Wherein L is the total casting length calculated by the system according to the weight of the molten steel in the furnace and the broken surface size of the casting machine;
if a casting blank is cut according to the L scale, the remaining size meets the rolling requirement, the casting blank can be cut according to a fixed length and a non-fixed length;
if one casting blank is cut according to the L, the left size can not meet the rolling requirement, and the casting blank can be cut according to two non-fixed-length average;
if the average cutting cannot meet the rolling requirement, the method is carried out according to a fixed-length cutting and a non-fixed-length cutting, and the non-fixed-length waste is disposed.
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 CN115213365A (en) | 2022-10-21 |
| CN115213365B true CN115213365B (en) | 2024-01-23 |
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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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| CN115213365A (en) | 2022-10-21 |
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