CN114713784A - Continuous casting tail billet sizing optimization cutting method - Google Patents
Continuous casting tail billet sizing optimization cutting method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 75
- 238000009749 continuous casting Methods 0.000 title claims abstract description 46
- 238000005520 cutting process Methods 0.000 title claims abstract description 25
- 238000004513 sizing Methods 0.000 title description 7
- 238000005457 optimization Methods 0.000 title description 6
- 238000005266 casting Methods 0.000 claims abstract description 378
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
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- 238000009826 distribution Methods 0.000 claims description 5
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- 238000011084 recovery Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
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- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
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- B22D11/163—Controlling or regulating processes or operations for cutting cast stock
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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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Abstract
The invention provides a method for cutting a continuous casting tail blank in a fixed length and optimizing manner, which comprises the following steps of: (1) collecting parameters of a continuous casting machine, and obtaining the distance L between each casting flow blank head and the outlet of the crystallizern(ii) a (2) According to the weight W of molten steel in the tundish and the constant pulling speed v0Calculating the number N of each casting blank with fixed length produced by casting before the adjustment of the casting speedn(ii) a (3) According to the calculation result of the step (2), proportionally distributing the molten steel in the tundish to each casting flow; (4) adjusting the casting speed of each casting flow to v according to the process requirementn(ii) a (5) After the quantity of the fixed-length casting blanks produced by each casting flow reaches a target value and the weight of molten steel in the tundish meets the process requirement, closing the casting flow and carrying out tundish quick-change operation; wherein n represents the number of streams of the cast strand, and n.gtoreq.2. The method provided by the invention improves the calculation accuracy and reduces the cutting amount of the tail billet, thereby improving the metal yield and improving the economic benefit.
Description
Technical Field
The invention belongs to the technical field of steel smelting, relates to a method for cutting a continuous casting tail billet, and particularly relates to a method for cutting the continuous casting tail billet in a fixed length and optimizing manner.
Background
The cutting is the most important ring in the continuous casting process, is responsible for cutting the casting blank into required length, and is an important link for improving the metal yield. When the quick-change tundish operation is carried out, because the lengths of the casting blanks flowing out of the crystallizers are different, the length of the tail blank after the standard casting blank is removed is difficult to ensure to be a whole length or a spare length, so that the actually cut tail blank is lengthened, and a great amount of waste of the tail blank is caused.
At present, most domestic iron and steel smelting plants do not carry out fixed-length optimized cutting on continuous casting tail billets during quick change operation, and only adopt a method of combining a whole length with a spare length to cut the casting billets according to the length of the casting billets from a crystallizer to a flame cutting machine after a tundish is stopped casting, so that the cut tail billets are likely to be different from each other in length of one whole length. Because the length of the tail billet does not meet the standard requirement, the part of casting blank can only be used as the tail billet to be cut into waste, and huge economic loss can be caused every year.
Aiming at the few continuous casting tail billet sizing optimization cutting methods at present, the method mainly comprises two types: one is to stop the casting in sequence by estimating the casting residual time; the other method is a calculation method for judging whether the molten steel amount in the steel ladle is a fixed-size multiple. The former needs to frequently acquire the pulling speed from a basic level, and if the pulling speed fluctuates abnormally, the calculation accuracy is greatly reduced; in the latter case, the weight value of the ladle needs to be acquired in advance, so that the accuracy is poor in practical application and the optimization work is difficult to complete well.
Therefore, how to provide a method for cutting continuous casting tail blank in a fixed-length and optimized mode improves calculation accuracy, reduces the cutting amount of the tail blank, improves metal yield, improves economic benefit and becomes a problem which needs to be solved urgently by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a method for cutting continuous casting tail blank in a fixed-length and optimized mode, which improves the calculation accuracy and reduces the cutting amount of the tail blank, thereby improving the metal yield and the economic benefit.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for cutting a continuous casting tail blank in a fixed length and optimizing manner, which comprises the following steps of:
(1) collecting parameters of a continuous casting machine, and obtaining the distance L between each casting flow blank head and the outlet of the crystallizern；
(2) According to the weight W of molten steel in the tundish and the constant pulling speed v0Calculating the number N of each casting blank with fixed length produced by casting before the adjustment of the casting speedn；
(3) According to the calculation result of the step (2), proportionally distributing the molten steel in the tundish to each casting flow;
(4) adjusting the casting speed of each casting flow to v according to the process requirementn；
(5) After the quantity of the fixed-length casting blanks produced by each casting flow reaches a target value and the weight of molten steel in the tundish meets the process requirement, closing the casting flow and carrying out tundish quick-change operation;
where n denotes the number of strands of the strand and n.gtoreq.2, n may be, for example, 2,3,4,5, 6, 7 or 8, but is not limited to the values listed, and other values not listed within this range of values are equally applicable.
According to the invention, the casting speed of each casting flow in the multi-casting-flow continuous casting machine is adjusted before the quick change operation of the tundish is carried out, so that the molten steel in the tundish is distributed to each casting flow in proportion, and the distance between the outlet of each casting flow crystallizer and the flame cutter is a multiple of the length of a fixed-length casting blank or a scattered-length casting blank, thereby reducing the cutting amount of the continuous casting tail blank to the maximum extent, improving the metal yield while ensuring the quality of the casting blank, and improving the economic benefit.
Preferably, the calculation process in step (2) is specifically:
(2.1) according to the weight W of molten steel in the tundish and the constant drawing speed v0Calculating pull rateTotal pouring time
Where ρ is the density of the cast strand and S is the cross-sectional area of the cast strand;
(2.2) according to the pouring time t obtained in the step (1), combining the length l of the fixed-length casting blankDCalculating the number of the casting blanks of the specified length produced by each casting run before the adjustment of the casting speed
Wherein L is0Is the set value of the length of the tail billet.
In the invention, the quantity N of the fixed-length casting blanks produced by each casting flow before the pulling speed is adjustednIt is not necessary to round it up, but it can be considered as a virtual quantity.
Preferably, said L of step (2.2)0The range of (b) is 2.5 to 4m, and may be, for example, 2.5m, 2.6m, 2.8m, 3m, 3.2m, 3.4m, 3.6m, 3.8m or 4m, and more preferably 2.5m, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.
Preferably, the allocating process in step (3) is specifically:
(3.1) respectively adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the pulling speed obtained in the step (2) is adjustednPerforming ROUNDDOWN (N)n0) function calculation to obtain the number R (N) of each casting run produced sized casting blank before the casting speed is adjustedn) And adding the sum to obtain the sum sigma R (N) of the counts of all the casting flows which produce the fixed-length casting blanks before the pulling speed is adjustedn)；
(3.2) adjusting the pulling rate obtained in the step (2) to produce the quantity N of fixed-length casting blanks of each casting flow beforenAre added to obtain NGeneral assemblyAnd to the obtained NGeneral assemblyPerforming ROUNDDOWN (N)General assembly0) function calculation to obtain the sum R (N) of the number of the fixed-length casting blanks produced by all the casting flows in theoryGeneral assembly)；
(3.3) Using the Σ R (N) obtained in step (3.1)n) And R (N) obtained in step (3.2)General assembly) Calculating the difference value | R (N) of the two countsGeneral assembly)-∑R(Nn) And distributing the obtained count difference values evenlyObtaining the number M of the fixed-length casting blanks produced by each casting flow after the theoretical pull-up speed is adjusted for each casting flown；
(3.4) distance L between each casting strand head obtained according to step (1) and the outlet of the crystallizernLength l of the blank to be sizedDCalculating the number of the fixed-size casting blanks produced by the casting blanks between each casting flow blank head and the outlet of the crystallizer
Combining M obtained in step (3.3)nCalculating the weight of molten steel theoretically distributed per casting strand
Preferably, the specific process of the adjustment in step (4) is as follows:
(4.1) W obtained according to step (3.4)nAnd (3) calculating the theoretical drawing speed of each casting flow by combining the pouring time t obtained in the step (2.1)
(4.2) according to the constant pulling rate v0Setting an upper limit v of a pulling rate+And lower limit of pulling speed v-(ii) a V 'when obtained in step (4.1)'n∈(v-,v+) While adjusting the casting speed v of the respective casting strandn＝v′n(ii) a V 'when obtained in step (4.1)'n≥v+While adjusting the casting speed v of the respective casting strandn＝v+(ii) a V 'when obtained in step (4.1)'n≤v-While adjusting the casting speed v of the respective casting strandn＝v-。
Preferably, the upper limit v of the pulling rate of step (4.2)+And constant pull rate v0Difference Δ v therebetween1Satisfies the following conditions:
for example, it may be 0.01 or 0.02. 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09 or 0.1, but not limited to the recited values, and other values not recited within the numerical range are equally applicable.
Preferably, the pulling rate lower limit v of step (4.2)-And constant pull rate v0Difference Δ v therebetween2Satisfies the following conditions:
for example, it may be 0.01, 0.02, 0.04, 0.06, 0.08, 0.1, 0.12, 0.14, 0.16, 0.18 or 0.2, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
The invention is realized by adjusting the casting speed v of each casting flownLimited to the upper limit v of the pulling rate+And lower limit of pulling speed v-And the floating ranges of the upper drawing speed limit and the lower drawing speed limit are strictly limited, so that the adverse effect on the quality of the casting blank caused by too high or too low drawing speed is avoided, and the quality of the casting blank is always maintained at a higher level.
Preferably, said constant pull rate v0The value of (b) is in the range of 1 to 1.2m/min, and may be, for example, 1m/min, 1.02m/min, 1.04m/min, 1.06m/min, 1.08m/min, 1.1m/min, 1.12m/min, 1.14m/min, 1.16m/min, 1.18m/min or 1.2m/min, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
Preferably, the method further comprises the step of preparing a strand by using the continuous casting tail billet produced by each casting flow after the drawing speed is adjusted.
Preferably, the length l of the scattered-length casting blankSLength l of the fixed length casting blankDThe difference Δ l therebetween satisfies:
for example, it may be 0.01, 0.05, 0.10.15, 0.2, 0.25 or 0.3, but are not limited to the recited values, and other values not recited within the numerical range are equally applicable.
Preferably, the length l of the sized strand isDIs 6 to 10m, and may be, for example, 6m, 6.5m, 7m, 7.5m, 8m, 8.5m, 9m, 9.5m or 10m, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
As a preferred technical scheme of the invention, the method comprises the following steps:
(1) collecting parameters of a continuous casting machine, and obtaining the distance L between each casting flow blank head and the outlet of the crystallizern；
(2) According to the weight W of molten steel in the tundish and the constant pulling speed v0Calculating the number N of each casting blank with fixed length produced by casting before the adjustment of the casting speednThe specific calculation process is as follows:
(2.1) according to the weight W of molten steel in the tundish and the constant drawing speed v0Calculating the casting time before the casting speed is adjusted
Where ρ is the density of the cast strand and S is the cross-sectional area of the cast strand;
(2.2) according to the pouring time t obtained in the step (1), combining the length l of the fixed-length casting blankDCalculating the number of the fixed-length casting blanks produced by each casting run before the pulling speed is adjusted
Wherein L is0Is the set value of the length of the tail billet and is 2.5 m;
(3) and (3) according to the calculation result of the step (2), proportionally distributing the molten steel in the tundish to each casting flow, wherein the specific distribution process is as follows:
(3.1) respectively adjusting the quantity N of the fixed-length casting blanks produced by each casting flow before the pulling speed obtained in the step (2)nPerforming ROUNDDOWN (N)n0) function calculation to obtain the number R (N) of each casting run produced sized casting blank before the casting speed is adjustedn) And adding the sum to obtain the sum sigma R (N) of the counts of all the casting flows which produce the fixed-length casting blanks before the pulling speed is adjustedn)；
(3.2) adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the drawing speed obtained in the step (2)nAre added to obtain NGeneral assemblyAnd to the obtained NGeneral assemblyPerforming ROUNDDOWN (N)General assembly0) function calculation to obtain the sum R (N) of the counts of all theoretically produced sized casting blanksGeneral assembly)；
(3.3) Using the Σ R (N) obtained in step (3.1)n) And R (N) obtained in step (3.2)General assembly) Calculating the difference value | R (N) of the two countsGeneral assembly)-∑R(Nn) And averagely distributing the obtained difference value of the counts to each casting flow to obtain the count M of each casting flow for producing a fixed-length casting blank after theoretical pull-up speed adjustmentn；
(3.4) distance L between each casting strand head obtained according to step (1) and the outlet of the crystallizernLength l of the blank to be sizedDCalculating the number of the fixed-size casting blanks produced by the casting blanks between each casting flow blank head and the outlet of the crystallizer
Combining M obtained in step (3.3)nCalculating the weight of molten steel theoretically distributed per casting strand
(4) Adjusting the casting speed of each casting flow to v according to the process requirementnThe specific adjustment process is as follows:
(4.1) W obtained according to step (3.4)nAnd (3) calculating the theoretical drawing speed of each casting flow by combining the pouring time t obtained in the step (2.1)
(4.2) according to the constant pulling rate v0Setting an upper limit v of a pulling rate+And lower limit of pulling speed v-(ii) a V 'when obtained in step (4.1)'n∈(v-,v+) While adjusting the casting speed v of the respective casting strandn＝v′n(ii) a V 'when obtained in step (4.1)'n≥v+While adjusting the casting speed v of the respective casting strandn＝v+(ii) a V 'when obtained in step (4.1)'n≤v-While adjusting the casting speed v of the respective casting strandn＝v-(ii) a Wherein the upper limit v of the pulling rate+And constant pull rate v0Difference Δ v therebetween1Satisfies the following conditions:
the lower limit v of the pulling speed-And constant pull rate v0Difference Δ v therebetween2Satisfies the following conditions:
and the constant pull rate v0The value range of (A) is 1-1.2 m/min;
(5) preparing a scattered-scale casting blank by using the continuous casting tail blank produced by each casting flow after the pulling speed is adjusted; length l of the bulk length casting blankSLength l of the fixed length casting blankDThe difference Δ l therebetween satisfies:
and the length l of the fixed-length casting blankDIs 6-10 m;
(6) after the quantity of the fixed-length casting blanks produced by each casting flow reaches a target value and the weight of molten steel in the tundish meets the process requirement, closing the casting flow and carrying out tundish quick-change operation;
wherein n represents the number of streams of the cast strand, and n.gtoreq.2.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the casting speed of each casting flow in the multi-casting-flow continuous casting machine is adjusted before the quick change operation of the tundish is carried out, so that the molten steel in the tundish is distributed to each casting flow in proportion, the distance between the outlet of each casting flow crystallizer and the flame cutting machine is a multiple of the length of a fixed-length casting blank or a scattered-length casting blank, the cutting amount of the continuous casting tail blank is reduced to the maximum extent, and compared with the method before speed adjustment, the recovery rate of the continuous casting tail blank is increased to 24.3% at the highest, the metal yield is increased while the quality of the casting blank is ensured, and the economic benefit is improved.
Drawings
FIG. 1 is a flow chart of a method for cutting a continuous casting tail billet in a fixed-length and optimized manner.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitation of the present invention.
Example 1
The embodiment provides a method for cutting a continuous casting tail billet in a sizing and optimizing manner, which comprises the following steps of:
(1) collecting 5 parameters of the casting continuous casting machine, and obtaining the distance L between each casting head and the outlet of the crystallizernWherein n is 1,2,3,4, 5;
(2) according to the weight W of molten steel in the tundish, 18t and a constant drawing speed v0Calculating the number N of the casting blanks with fixed length produced by each casting flow before the pulling speed is adjusted according to the ratio of 1.1m/minnThe specific calculation process is as follows:
(2.1) according to the weight W of molten steel in the tundish and the constant pulling speed v0Calculating the casting time before the casting speed is adjusted
Where ρ is the density of the cast strand and S is the cross-sectional area of the cast strand;
(2.2) according to the pouring time t obtained in the step (1), combining the length l of the fixed-length casting blankDCalculating the number of the casting blanks of the specified length produced by each casting run before the adjustment of the casting speed
Wherein L is0Is a tail billet length set value;
(3) and (3) according to the calculation result of the step (2), proportionally distributing the molten steel in the tundish to each casting flow, wherein the specific distribution process is as follows:
(3.1) respectively adjusting the quantity N of the fixed-length casting blanks produced by each casting flow before the pulling speed obtained in the step (2)nPerforming ROUNDDOWN (N)n0) function calculation to obtain the number R (N) of each casting run produced sized casting blank before the casting speed is adjustedn) And adding the sum to obtain the sum sigma R (N) of the counts of all the casting flows which produce the fixed-length casting blanks before the pulling speed is adjustedn)＝22；
(3.2) adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the drawing speed obtained in the step (2)nAre added to obtain NGeneral assemblyAnd to the obtained NGeneral assemblyPerforming ROUNDDOWN (N)General (1)0) function calculation to obtain the sum R (N) of the counts of all theoretically produced sized casting blanksGeneral assembly)＝25；
(3.3) Using the Σ R (N) obtained in step (3.1)n) And R (N) obtained in step (3.2)General assembly) Calculating the difference value | R (N) of the two countsGeneral (1))-∑R(Nn) 3, and evenly distributing the obtained difference value of the counts to each casting flow to obtain the count M of each casting flow for producing a fixed-length casting blank after the theoretical pull-up speed is adjustedn；
(3.4) distance L between each casting strand head obtained according to step (1) and the outlet of the crystallizernLength l of the cast slab in combination with sizingDCalculating the number of the fixed-size casting blanks produced by the casting blank between each casting blank head and the outlet of the crystallizer
Combining M obtained in step (3.3)nCalculating the weight of molten steel theoretically distributed per casting strand
(4) Adjusting the casting speed of each casting flow to v according to the process requirementnThe specific adjustment process is as follows:
(4.1) W obtained according to step (3.4)nAnd (3) calculating the theoretical drawing speed of each casting flow by combining the pouring time t obtained in the step (2.1)
(4.2) according to the constant pulling rate v0The upper limit v of the pulling rate is set to 1.1m/min+1.2m/min and lower limit of pulling speed v-0.9 m/min; v 'when obtained in step (4.1)'nE (0.9,1.2), adjusting the casting speed v of the corresponding casting flown＝v′n(ii) a V 'when obtained in step (4.1)'nWhen the casting speed is more than or equal to 1.2m/min, the casting speed v of the corresponding casting flow is adjustedn1.2 m/min; v 'when obtained in step (4.1)'nWhen the casting speed is less than or equal to 0.9m/min, the pulling speed v of the corresponding casting flow is adjustedn＝0.9m/min；
(5) Preparing a discrete ruler casting blank by utilizing the continuous casting tail blank produced by each casting flow after the pulling speed is adjusted, wherein the length l of the discrete ruler casting blankS＝7.30m；
(6) And after the quantity of the fixed-length casting blanks produced by each casting flow reaches a target value and the weight of molten steel in the tundish meets the process requirement, closing the casting flows and carrying out tundish quick-change operation.
The intermediate parameters involved in the calculation process of this example and the final results are shown in table 1.
TABLE 1
As can be seen from Table 1: in the embodiment, the total number of the fixed-length casting blanks obtained before the pulling speed is adjusted is 22, the total number of the bulk casting blanks is 3, and the actual length of the tail blanks is 20.6 m; and the total number of the fixed-length casting blanks obtained after the drawing speed is adjusted is increased to 24, the total number of the bulk casting blanks is reduced to 1, and the actual length of the tail blanks is reduced to 17.8 m. The conversion can obtain: compared with the prior speed regulation, the recovery rate of the continuous casting tail billet is improved to 13.6 percent.
Example 2
The embodiment provides a method for cutting a continuous casting tail billet in a sizing and optimizing manner, which comprises the following steps of:
(1) collecting 5 casting continuous casting machine parameters, and obtaining the distance L between each casting blank head and the outlet of the crystallizernWherein n is 1,2,3,4, 5;
(2) according to the weight of molten steel in the tundishW is 20t and constant pull rate v0Calculating the number N of the casting blanks with fixed length produced by each casting flow before the pulling speed is adjusted according to the ratio of 1.1m/minnThe specific calculation process is as follows:
(2.1) according to the weight W of molten steel in the tundish and the constant drawing speed v0Calculating the casting time before the casting speed is adjusted
Where ρ is the density of the cast strand and S is the cross-sectional area of the cast strand;
(2.2) according to the pouring time t obtained in the step (1), combining the length l of the fixed-length casting blankDCalculating the number of the casting blanks of the specified length produced by each casting run before the adjustment of the casting speed
Wherein L is0Is a set value of the length of the tail billet;
(3) and (3) distributing the molten steel in the tundish to each casting flow in proportion according to the calculation result of the step (2), wherein the specific distribution process is as follows:
(3.1) respectively adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the pulling speed obtained in the step (2) is adjustednProceed to ROUNDDOWN (N)n0) function calculation to obtain the number R (N) of each casting run produced sized casting blank before the casting speed is adjustedn) And adding the sum to obtain the sum sigma R (N) of the counts of all the casting flows which produce the fixed-length casting blanks before the pulling speed is adjustedn)＝25；
(3.2) adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the drawing speed obtained in the step (2)nAre added to obtain NGeneral assemblyAnd to the obtained NGeneral assemblyPerforming ROUNDDOWN (N)General assembly0) function calculation to obtain the sum R (N) of the counts of all theoretically produced sized casting blanksGeneral assembly)＝28；
(3.3) Using Σ R (N) obtained in step (3.1)n) And R (N) obtained in step (3.2)General assembly) Calculating the difference value | R (N) of the two countsGeneral assembly)-∑R(Nn) 3, and evenly distributing the obtained difference value of the counts to each casting flow to obtain the count M of each casting flow for producing a fixed-length casting blank after the theoretical pull-up speed is adjustedn；
(3.4) distance L between each casting strand head obtained according to the step (1) and the outlet of the moldnLength l of the blank to be sizedDCalculating the number of the fixed-size casting blanks produced by the casting blanks between each casting flow blank head and the outlet of the crystallizer
Combining M obtained in step (3.3)nCalculating the weight of molten steel theoretically distributed per casting strand
(4) Adjusting the casting speed of each casting flow to v according to the process requirementnThe specific adjustment process is as follows:
(4.1) W obtained according to step (3.4)nAnd (3) calculating the theoretical casting speed of each casting flow by combining the pouring time t obtained in the step (2.1)
(4.2) according to the constant pulling rate v0The upper limit v of the pulling rate is set to 1.1m/min+1.2m/min and lower limit of pulling speed v-0.9 m/min; v 'when obtained in step (4.1)'nE (0.9,1.2), adjusting the casting speed v of the corresponding casting flown＝v′n(ii) a V 'when obtained in step (4.1)'nWhen the casting speed is more than or equal to 1.2m/min, adjusting the casting speed v of the corresponding casting flown1.2 m/min; v 'when obtained in step (4.1)'nWhen the casting speed is less than or equal to 0.9m/min, the pulling speed v of the corresponding casting flow is adjustedn＝0.9m/min；
(5) Preparing a scattered ruler casting blank by using the continuous casting tail blank produced by each casting flow after the pulling speed is adjusted, wherein the length l of the scattered ruler casting blankS＝7.57m；
(6) And after the quantity of the fixed-length casting blanks produced by each casting flow reaches a target value and the weight of molten steel in the tundish meets the process requirement, closing the casting flow and performing tundish quick-change operation.
The intermediate parameters involved in the calculation process of this embodiment and the final results are shown in table 2.
TABLE 2
As can be seen from Table 1: in the embodiment, the total number of the fixed-length casting blanks obtained before the pulling speed is adjusted is 25, the total number of the bulk casting blanks is 1, and the actual length of the tail blanks is 31.3 m; and the total number of the fixed-length casting blanks obtained after the drawing speed is adjusted is 25, the total number of the bulk casting blanks is increased to 2, and the actual length of the obtained tail blanks is reduced to 23.7 m. The conversion can obtain: compared with the prior art, the recovery rate of the continuous casting tail billet is improved to 24.3 percent in the embodiment.
Example 3
The embodiment provides a method for cutting a continuous casting tail billet in a sizing and optimizing manner, which comprises the following steps of:
(1) collecting 5 parameters of the casting continuous casting machine, and obtaining the distance L between each casting head and the outlet of the crystallizernWherein n is 1,2,3,4, 5;
(2) according to the weight W of the molten steel in the tundish, 16t and a constant drawing speed v0Calculating the number N of the casting blanks with fixed length produced by each casting flow before the pulling speed is adjusted according to the ratio of 1.0m/minnThe specific calculation process is as follows:
(2.1) according to the weight W of molten steel in the tundish and the constant drawing speed v0Calculating the casting time before the casting speed is adjusted
Where ρ is the density of the cast strand and S is the cross-sectional area of the cast strand;
(2.2) according to the pouring time t obtained in the step (1), combining the length l of the fixed-length casting blankDCalculating the number of the casting blanks of the specified length produced by each casting run before the adjustment of the casting speed
Wherein L is0Is a tail billet length set value;
(3) and (3) according to the calculation result of the step (2), proportionally distributing the molten steel in the tundish to each casting flow, wherein the specific distribution process is as follows:
(3.1) respectively adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the pulling speed obtained in the step (2) is adjustednPerforming ROUNDDOWN (N)n0) function calculation to obtain the number R (N) of each casting run produced sized casting blank before the casting speed is adjustedn) And adding the sum to obtain the sum sigma R (N) of the counts of all the casting flows which produce the fixed-length casting blanks before the pulling speed is adjustedn)＝23；
(3.2) adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the drawing speed obtained in the step (2)nAre added to obtain NGeneral assemblyAnd to the obtained NGeneral assemblyPerforming ROUNDDOWN (N)General assembly0) function calculation to obtain the sum R (N) of the counts of all theoretically produced sized casting blanksGeneral assembly)＝25；
(3.3) Using the Σ R (N) obtained in step (3.1)n) And R (N) obtained in step (3.2)General assembly) Calculating the difference value | R (N) of the two countsGeneral assembly)-∑R(Nn) The obtained difference value of the counts is evenly distributed to each casting flow to obtain the counts M of each casting flow which produces the casting blank with the fixed length after the theoretical pull-up speed is adjustedn；
(3.4) distance L between each casting strand head obtained according to step (1) and the outlet of the crystallizernLength l of the blank to be sizedDCalculating the number of the fixed-size casting blanks produced by the casting blanks between each casting flow blank head and the outlet of the crystallizer
Combining M obtained in step (3.3)nCalculating the weight of molten steel theoretically distributed per casting strand
(4) Adjusting the casting speed of each casting flow to v according to the process requirementnThe specific adjustment process is as follows:
(4.1) W obtained according to step (3.4)nCalculating the theoretical casting time per hour by combining the casting time t obtained in the step (2.1)Pulling rate of individual strand
(4.2) according to the constant pulling rate v0The upper limit v of the pulling rate is set to 1.0m/min+1.1m/min and lower limit of pulling speed v-0.8 m/min; v 'when obtained in step (4.1)'nWhen the element belongs to (0.8,1.1), adjusting the casting speed v of the corresponding casting flown＝v′n(ii) a V 'when obtained in step (4.1)'nWhen the casting speed is more than or equal to 1.1m/min, the casting speed v of the corresponding casting flow is adjustedn1.1 m/min; v 'when obtained in step (4.1)'nWhen the casting speed is less than or equal to 0.8m/min, the pulling speed v of the corresponding casting flow is adjustedn＝0.8m/min；
(5) Preparing a scattered ruler casting blank by using the continuous casting tail blank produced by each casting flow after the pulling speed is adjusted, wherein the length l of the scattered ruler casting blankS＝7.24m；
(6) And after the quantity of the fixed-length casting blanks produced by each casting flow reaches a target value and the weight of molten steel in the tundish meets the process requirement, closing the casting flows and carrying out tundish quick-change operation.
The intermediate parameters involved in the calculation process of this embodiment and the final results are shown in table 3.
TABLE 3
As can be seen from Table 1: in the embodiment, the total number of the fixed-length casting blanks obtained before the pulling speed is adjusted is 23, the total number of the bulk casting blanks is 2, and the actual length of the tail blanks is 19.6 m; and the total number of the fixed-length casting blanks obtained after the drawing speed is adjusted is 25, the total number of the bulk casting blanks is reduced to 0, and the actual length of the tail blanks is reduced to 16.9 m. The conversion can obtain: compared with the prior speed regulation, the recovery rate of the continuous casting tail billet is improved to 13.8 percent in the embodiment.
Example 4
This example provides a method for the cut-to-length optimization of a continuous casting tail stock, which does not involve the step (4.2) of the upper limit v of the drawing speed+Is defined, then v1＝1.49m/min，v2＝1.31m/min，v3＝1.35m/min，v4＝1.28m/min，v5The other steps and conditions are the same as in example 1, and thus are not repeated herein.
Compared with example 1, in this example, the total number of fixed-length billets obtained after the casting speed adjustment is increased to 25, the total number of loose-length billets obtained is reduced to 0, the actual length of the obtained tail billets is reduced to 16.5m, and the recovery rate of the continuous casting tail billets is increased to 19.9%, but the casting quality of the obtained billets is inferior to that of example 1 because the casting speeds of the 1 st to 4 th casting flows are too fast.
Example 5
The present example provides a method for the cut-to-length optimization of a continuous casting tail billet, which does not involve the lower limit v of the drawing speed except for step (4.2)-Is defined, then v1＝1.20m/min，v2＝1.20m/min，v3＝1.20m/min，v4＝1.20m/min，v5The rest of the steps and conditions were the same as in example 1 and thus are not repeated herein.
Compared with the embodiment 1, on one hand, in the embodiment, the total number of the fixed-length casting blanks obtained after the pulling speed is adjusted is increased to 23, the total number of the bulk casting blanks is reduced to 2, the actual length of the obtained tail blanks is reduced to 19.2m, and the recovery rate of the continuous casting tail blanks is increased to 6.8%; on the other hand, the casting product production efficiency of the casting product of example 1 was inferior due to the excessively slow drawing rate of the 5 th strand.
Therefore, the casting speed of each casting flow in the multi-casting-flow continuous casting machine is adjusted before the quick change operation of the tundish, so that the molten steel in the tundish is proportionally distributed to each casting flow, the distance between the outlet of the crystallizer of each casting flow and the flame cutter is a multiple of the length of a fixed-length casting blank or a scattered-length casting blank, the cutting amount of the continuous casting tail blank is reduced to the maximum extent, and compared with the method before speed adjustment, the recovery rate of the continuous casting tail blank is improved to 24.3% to the maximum extent, the metal yield is improved while the quality of the casting blank is ensured, and the economic benefit is improved.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein fall within the scope and disclosure of the present invention.
Claims (10)
1. A method for cutting continuous casting tail blank in a fixed length and optimizing manner is characterized by comprising the following steps:
(1) collecting parameters of a continuous casting machine, and obtaining the distance L between each casting flow blank head and the outlet of the crystallizern；
(2) According to the weight W of molten steel in the tundish and the constant pulling speed v0Calculating the number N of the fixed-length casting blanks produced by each casting flow before the pulling speed is adjustedn；
(3) According to the calculation result of the step (2), proportionally distributing the molten steel in the tundish to each casting flow;
(4) adjusting the casting speed of each casting flow to v according to the process requirementn；
(5) After the quantity of the fixed-length casting blanks produced by each casting flow reaches a target value and the weight of molten steel in the tundish meets the process requirement, closing the casting flow and carrying out tundish quick-change operation;
wherein n represents the number of streams of the cast strand, and n.gtoreq.2.
2. The method according to claim 1, wherein the calculation in step (2) is specifically performed by:
(2.1) according to the weight W of molten steel in the tundish and the constant drawing speed v0Calculating the casting time before the casting speed is adjusted
Where ρ is the density of the cast strand and S is the cross-sectional area of the cast strand;
(2.2) according to the pouring time t obtained in the step (1), combining the length l of the fixed-length casting blankDCalculating pull rateThe quantity of the fixed-size casting blanks produced by each casting flow before the whole process
Wherein L is0Is a tail billet length set value;
preferably, said L of step (2.2)0The value range of (A) is 2.5 to 4m, and more preferably 2.5 m.
3. The method according to claim 2, wherein the allocating process of step (3) is specifically:
(3.1) respectively adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the pulling speed obtained in the step (2) is adjustednProceed to ROUNDDOWN (N)n0) function calculation to obtain the number R (N) of each casting run produced sized casting blank before the casting speed is adjustedn) And adding the sum to obtain the sum sigma R (N) of the counts of all the casting flows which produce the fixed-length casting blanks before the pulling speed is adjustedn)；
(3.2) adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the drawing speed obtained in the step (2)nAre added to obtain NGeneral (1)And to the obtained NGeneral (1)Performing ROUNDDOWN (N)General (1)0) function calculation to obtain the sum R (N) of the counts of all theoretically produced sized casting blanksGeneral (1))；
(3.3) Using the Σ R (N) obtained in step (3.1)n) And R (N) obtained in step (3.2)General (1)) Calculating the difference value | R (N) of the two countsGeneral assembly)-∑R(Nn) And averagely distributing the obtained difference value of the counts to each casting flow to obtain the count M of each casting flow for producing a fixed-length casting blank after theoretical pull-up speed adjustmentn；
(3.4) distance L between each casting strand head obtained according to step (1) and the outlet of the crystallizernLength l of the blank to be sizedDCalculating the number of the fixed-size casting blanks produced by the casting blanks between each casting flow blank head and the outlet of the crystallizer
Combining M obtained in step (3.3)nCalculating the weight of molten steel theoretically distributed per casting strand
4. The method according to claim 3, wherein the specific process of the adjustment in step (4) is:
(4.1) W obtained according to step (3.4)nAnd (3) calculating the theoretical drawing speed of each casting flow by combining the pouring time t obtained in the step (2.1)
(4.2) according to the constant pulling rate v0Setting an upper limit v of a pulling rate+And lower limit of pulling speed v-(ii) a V 'when obtained in step (4.1)'n∈(v-,v+) While adjusting the casting speed v of the respective casting strandn＝v′n(ii) a V 'when obtained in step (4.1)'n≥v+While adjusting the casting speed v of the respective casting strandn＝v+(ii) a V 'when obtained in step (4.1)'n≤v-While adjusting the casting speed v of the respective casting strandn＝v-。
5. The method of claim 4, wherein step (4.2) provides an upper pull-up speed limit v+And constant pull rate v0Difference Δ v therebetween1Satisfies the following conditions:
6. the method of claim 4, wherein step (4.2) provides the lower pulling rate limit v-And constant pull rate v0Difference Δ v therebetween2Satisfies the following conditions:
7. the method of claim 5 or 6Method, characterized in that said constant pull rate v0The value range of (A) is 1-1.2 m/min.
8. The method according to any one of claims 1 to 7, further comprising preparing a strand using the continuous casting tail stock produced from each strand after the casting speed adjustment.
9. Method according to claim 8, wherein the length l of the strand is discreteSLength l of the fixed length casting blankDThe difference Δ l therebetween satisfies:
preferably, the length l of the sized cast slabDIs 6-10 m.
10. Method according to any of claims 1-9, characterized in that the method comprises the steps of:
(1) collecting parameters of a continuous casting machine, and obtaining the distance L between each casting flow blank head and the outlet of the crystallizern；
(2) According to the weight W of molten steel in the tundish and the constant pulling speed v0Calculating the number N of each casting blank with fixed length produced by casting before the adjustment of the casting speednThe specific calculation process is as follows:
(2.1) according to the weight W of molten steel in the tundish and the constant drawing speed v0Calculating the casting time before the casting speed is adjusted
Where ρ is the density of the cast strand and S is the cross-sectional area of the cast strand;
(2.2) according to the pouring time t obtained in the step (1), combining the length l of the fixed-length casting blankDCalculating the number of the casting blanks of the specified length produced by each casting run before the adjustment of the casting speed
Wherein L is0Is the length of the tail billetSetting value and is 2.5 m;
(3) and (3) according to the calculation result of the step (2), proportionally distributing the molten steel in the tundish to each casting flow, wherein the specific distribution process is as follows:
(3.1) respectively adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the pulling speed obtained in the step (2) is adjustednPerforming ROUNDDOWN (N)n0) function calculation to obtain the number R (N) of each casting run produced sized casting blank before the casting speed is adjustedn) And adding the sum to obtain the sum sigma R (N) of the counts of all the casting flows which produce the fixed-length casting blanks before the pulling speed is adjustedn)；
(3.2) adjusting the quantity N of the casting blanks with fixed length produced by each casting flow before the drawing speed obtained in the step (2)nAre added to obtain NGeneral assemblyAnd to the obtained NGeneral assemblyPerforming ROUNDDOWN (N)General assembly0) function calculation to obtain the sum R (N) of the counts of all theoretically produced sized casting blanksGeneral assembly)；
(3.3) Using the Σ R (N) obtained in step (3.1)n) And R (N) obtained in step (3.2)General assembly) Calculating the difference value | R (N) of the two countsGeneral assembly)-∑R(Nn) And averagely distributing the obtained difference value of the counts to each casting flow to obtain the count M of each casting flow for producing a fixed-length casting blank after theoretical pull-up speed adjustmentn；
(3.4) distance L between each casting strand head obtained according to the step (1) and the outlet of the moldnLength l of the blank to be sizedDCalculating the number of the fixed-size casting blanks produced by the casting blanks between each casting flow blank head and the outlet of the crystallizer
Combining M obtained in step (3.3)nCalculating the weight of molten steel theoretically distributed per casting strand
(4) Adjusting the casting speed of each casting flow to v according to the process requirementnThe specific adjustment process is as follows:
(4.1) W obtained according to step (3.4)nCombining the results of step (2.1)Pouring time t, calculating the theoretical casting speed of each casting flow
(4.2) according to the constant pulling rate v0Setting an upper limit v of a pulling rate+And lower limit of pulling speed v-(ii) a V 'when obtained in step (4.1)'n∈(v-,v+) While adjusting the casting speed v of the respective strandn＝v′n(ii) a V 'when obtained in step (4.1)'n≥v+While adjusting the casting speed v of the respective casting strandn＝v+(ii) a V 'when obtained in step (4.1)'n≤v-While adjusting the casting speed v of the respective casting strandn＝v-(ii) a Wherein the upper limit v of the pulling rate+And constant pull rate v0Difference Δ v therebetween1Satisfies the following conditions:
the lower limit v of the pulling speed-And constant pull rate v0Difference Δ v therebetween2Satisfies the following conditions:
0.2, and the constant pull rate v0The value range of (A) is 1-1.2 m/min;
(5) preparing a scattered-scale casting blank by using the continuous casting tail blank produced by each casting flow after the pulling speed is adjusted; length l of the bulk length casting blankSLength l of the fixed length casting blankDThe difference Δ l therebetween satisfies:
and the length l of the fixed-length casting blankDIs 6-10 m;
(6) after the quantity of the fixed-length casting blanks produced by each casting flow reaches a target value and the weight of molten steel in the tundish meets the process requirement, closing the casting flow and carrying out tundish quick-change operation;
wherein n represents the number of streams of the cast strand, and n.gtoreq.2.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213365A (en) * | 2022-07-22 | 2022-10-21 | 重庆钢铁股份有限公司 | Method for reducing non-fixed length of slab continuous casting machine tail casting |
| CN115283632A (en) * | 2022-08-03 | 2022-11-04 | 重庆钢铁股份有限公司 | Method for reducing production of non-fixed-size billets during shutdown of billet continuous casting machine |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62234648A (en) * | 1986-04-02 | 1987-10-14 | Kawasaki Steel Corp | Auto-stop control method for multi-strand continuous caster |
| WO1988000504A1 (en) * | 1986-07-21 | 1988-01-28 | Zimmermann & Jansen Gmbh | Process for controlling a multi-line casting plant |
| JPH0985396A (en) * | 1995-09-25 | 1997-03-31 | Nippon Steel Corp | Method for completing casting in continuous casting |
| JPH11216553A (en) * | 1998-01-30 | 1999-08-10 | Kawasaki Steel Corp | Casting speed control |
| JP2000317583A (en) * | 1999-05-07 | 2000-11-21 | Nippon Steel Corp | Casting control method in billet continuous casting equipment |
| CN103264149A (en) * | 2013-05-24 | 2013-08-28 | 永兴特种不锈钢股份有限公司 | Method and device using computer programs to carry out continuous casting tail blank fixed length optimizing cutting |
| CN104226951A (en) * | 2014-09-05 | 2014-12-24 | 河北钢铁股份有限公司邯郸分公司 | Method for improving yield of qualified sized casting blanks at casting stop stage of continuous casting machine |
| 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 |
| CN106041011A (en) * | 2016-08-12 | 2016-10-26 | 湖南千盟物联信息技术有限公司 | Implementation method of continuous casting intermediate ladle remaining steel model |
| CN107649657A (en) * | 2017-08-29 | 2018-02-02 | 武钢集团昆明钢铁股份有限公司 | A kind of small billet tundish stops the method poured |
| CN110976804A (en) * | 2019-12-11 | 2020-04-10 | 中冶南方连铸技术工程有限责任公司 | Sizing control method of continuous casting billet |
| CN113083906A (en) * | 2021-02-22 | 2021-07-09 | 阳春新钢铁有限责任公司 | Production control method for reducing deformed steel bar detection waste |
| CN113333706A (en) * | 2021-05-18 | 2021-09-03 | 唐山不锈钢有限责任公司 | Method for realizing identification and optimized cutting of continuous casting unsteady-state casting blank at first level |
| CN114378272A (en) * | 2022-01-18 | 2022-04-22 | 江苏联峰能源装备有限公司 | Optimized cutting method for continuous casting machine |
-
2022
- 2022-04-26 CN CN202210447402.0A patent/CN114713784B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62234648A (en) * | 1986-04-02 | 1987-10-14 | Kawasaki Steel Corp | Auto-stop control method for multi-strand continuous caster |
| WO1988000504A1 (en) * | 1986-07-21 | 1988-01-28 | Zimmermann & Jansen Gmbh | Process for controlling a multi-line casting plant |
| JPH0985396A (en) * | 1995-09-25 | 1997-03-31 | Nippon Steel Corp | Method for completing casting in continuous casting |
| JPH11216553A (en) * | 1998-01-30 | 1999-08-10 | Kawasaki Steel Corp | Casting speed control |
| JP2000317583A (en) * | 1999-05-07 | 2000-11-21 | Nippon Steel Corp | Casting control method in billet continuous casting equipment |
| CN103264149A (en) * | 2013-05-24 | 2013-08-28 | 永兴特种不锈钢股份有限公司 | Method and device using computer programs to carry out continuous casting tail blank fixed length optimizing cutting |
| CN104226951A (en) * | 2014-09-05 | 2014-12-24 | 河北钢铁股份有限公司邯郸分公司 | Method for improving yield of qualified sized casting blanks at casting stop stage of continuous casting machine |
| 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 |
| CN106041011A (en) * | 2016-08-12 | 2016-10-26 | 湖南千盟物联信息技术有限公司 | Implementation method of continuous casting intermediate ladle remaining steel model |
| CN107649657A (en) * | 2017-08-29 | 2018-02-02 | 武钢集团昆明钢铁股份有限公司 | A kind of small billet tundish stops the method poured |
| CN110976804A (en) * | 2019-12-11 | 2020-04-10 | 中冶南方连铸技术工程有限责任公司 | Sizing control method of continuous casting billet |
| CN113083906A (en) * | 2021-02-22 | 2021-07-09 | 阳春新钢铁有限责任公司 | Production control method for reducing deformed steel bar detection waste |
| CN113333706A (en) * | 2021-05-18 | 2021-09-03 | 唐山不锈钢有限责任公司 | Method for realizing identification and optimized cutting of continuous casting unsteady-state casting blank at first level |
| CN114378272A (en) * | 2022-01-18 | 2022-04-22 | 江苏联峰能源装备有限公司 | Optimized cutting method for continuous casting machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213365A (en) * | 2022-07-22 | 2022-10-21 | 重庆钢铁股份有限公司 | Method for reducing non-fixed length of slab continuous casting machine tail casting |
| CN115213365B (en) * | 2022-07-22 | 2024-01-23 | 重庆钢铁股份有限公司 | Method for reducing tail casting non-fixed length of slab continuous casting machine |
| CN115283632A (en) * | 2022-08-03 | 2022-11-04 | 重庆钢铁股份有限公司 | Method for reducing production of non-fixed-size billets during shutdown of billet continuous casting machine |
| CN115283632B (en) * | 2022-08-03 | 2024-03-12 | 重庆钢铁股份有限公司 | Method for reducing production of non-fixed-length billets during shutdown of small square billet continuous casting machine |
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