CN112613166A - Method for planning tilting curve of converter tapping and method for controlling converter tapping - Google Patents
Method for planning tilting curve of converter tapping and method for controlling converter tapping Download PDFInfo
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 276
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- 229910000831 Steel Inorganic materials 0.000 claims description 54
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Abstract
Disclosed herein are a method for planning a tilting curve of converter tapping and a method for controlling converter tapping, including: determining the initial tapping angle y of the converter; according to the actual tilting angle theta of the converter in the first stage1Initial angle y of tapping and first tapping time coefficient K1Calculating to obtain the tapping time t of the first stage1(ii) a According to the actual tilting angle theta of the converter in the second stage2The angle alpha of the first stage of tapping and the time coefficient K of the second tapping2And constant k3Calculating to obtain the tapping time t of the second stage2(ii) a According to the estimated tapping time t of the converter0And the last rest time t of the converterZIs calculated to obtain the thirdTapping time t of stage3(ii) a According to the tapping time t of the first stage1Tapping time t in the second stage2And tapping time t of the third stage3And drawing and obtaining a continuous tilting curve. The control method can guide the automatic tilting control of the converter in the tapping process, reduce the manual workload and achieve more precise control precision.
Description
Technical Field
The invention relates to the technical field of converter steelmaking, in particular to a method for planning a tilting curve of converter tapping and a method for controlling converter tapping.
Background
As is well known, converter steelmaking is a rapid steelmaking method in which molten iron is used as a main raw material, oxygen is used as an oxidizing agent, and the temperature of molten steel is raised by means of the oxidation heat of elements in the molten iron, thereby completing a smelting period within about 30 minutes.
At present, converter steelmaking is the world's most important steelmaking method, and molten steel is discharged-tapped after smelting is completed and the temperature and composition of the molten steel meet the specified requirements of the steel type to be smelted. In the present stage, the most main tapping mode is to shake the furnace manually and completely depend on naked eye observation and experience judgment of people to shake the furnace and control tapping time, but because the field environment of the converter is severe, the sight and judgment capability of people are affected, the judgment error is large, the control precision of manual furnace shaking is difficult to guarantee, and the production benefit is affected.
Disclosure of Invention
The invention aims to provide a method for planning a tilting curve of converter tapping and a method for controlling converter tapping, which can guide and realize automatic tilting control of a converter in the tapping process, thereby reducing the workload of workers and achieving more precise control precision.
In order to achieve the above object, the present invention provides a method for planning a tilting curve of tapping from a converter, comprising:
determining the initial tapping angle y of the converter;
according to the actual tilting angle theta of the converter in the first stage1The initial angle y of tapping and the first tapping time coefficient K1And by the formula t1＝K1×(θ1-y) calculating the tapping time t of the first stage1；
According to the actual tilting angle theta of the converter in the second stage2The angle alpha of the first stage of tapping and the time coefficient K of the second tapping2And constant k3And by the formula t2＝K2×(θ2-α)+k3Calculating to obtain the tapping time t of the second stage2(ii) a Wherein the actual tilt angle θ of the first stage1Greater than the angle alpha of the first stage of tapping, secondThe actual tilt angle θ of a stage2Greater than the final angle β;
according to the estimated tapping time t of the converter0And the last rest time t of the converterZAnd by the formula t3＝t0–tZCalculating to obtain the tapping time t of the third stage3(ii) a Wherein the actual tilt angle θ of the third stage3Equal to said final angle β;
according to the initial tapping angle y and the actual tilting angle theta of the first stage1Actual tilt angle θ of the second stage2The final angle beta, the tapping time t of the first stage1The tapping time t of the second stage2And the tapping time t of the third stage3And drawing and obtaining a continuous tilting curve.
Optionally, the method further comprises:
according to the estimated tapping time t0The second tapping time coefficient K2And the upper limit y of the tapping initial angle of the converter1And by the formula t0＝K2×(θM-y1) Calculating to obtain the actual tapping angle upper limit theta of the converterM；
According to the actual tapping angle upper limit thetaMDrawing the tapping time t to obtain a continuous upper limit straight line;
and/or the presence of a gas in the gas,
according to the estimated tapping time t0The second tapping time coefficient K2And the lower limit y of the tapping initial angle of the converter2And by the formula t0＝K2×(θN-y2) Calculating to obtain the actual tapping angle lower limit theta of the converterN；
According to the actual tapping angle lower limit thetaNAnd drawing the tapping time t to obtain a continuous lower limit straight line.
Optionally, the step of determining the tapping initial angle y of the converter comprises:
according to the upper limit y of the tapping initial angle of the converter1And the lower limit of the tapping initial angle of the convertery2And by the formula y ═ y (y)1+y2) And/2, calculating to obtain the initial tapping angle y of the converter.
Optionally, the upper limit of the tapping initial angle y1And a lower limit y of the tapping initial angle of the converter2The acquisition mode comprises the following steps:
determining the quantity of molten steel of the converter, the safety height L between a converter mouth of the converter and the molten steel and the depth H between a steel-tapping hole of the converter and the molten steel on the premise of not rolling slag;
obtaining the lower limit y of the tapping initial angle of the converter according to the safety height L2And obtaining the upper limit y of the tapping initial angle according to the depth H1。
Optionally, the lower tapping angle limit y of the converter is obtained according to the safety height L2And obtaining the upper limit y of the tapping initial angle according to the depth H1The method comprises the following steps:
according to the tilting simulation carried out by the three-dimensional model of the converter, the lower limit y of the tapping initial angle of the converter is obtained according to the safety height L2And obtaining the upper limit y of the tapping initial angle according to the depth H1。
Optionally, the predicted tapping time t of the converter0The acquisition mode comprises the following steps:
according to the tapping amount v of the converter in the unit time during tapping and the molten steel amount m of the steel in the furnace, and through the formula t0Calculating the predicted tapping time t of the converter as m/v0。
Optionally, the final angle β is in particular in the range of-100 ° to-105 °, and/or the last rest time tZSpecifically in the range of 15s to 25 s.
Optionally, the tapping amount v is specifically an average tapping amount per unit time during tapping of a plurality of heats of the converter.
Optionally, the method further comprises:
and controlling converter tapping according to the tilting curve.
Against the background of the inventionAccording to the method for planning the tilting curve of the converter tapping, provided by the embodiment of the invention, the initial tapping angle y of the converter is determined; then according to the actual tilting angle theta of the converter in the first stage1Initial angle y of tapping and first tapping time coefficient K1And by the formula t1＝K1×(θ1-y) calculating the tapping time t of the first stage1(ii) a And according to the actual tilting angle theta of the converter in the second stage2The angle alpha of the first stage of tapping and the time coefficient K of the second tapping2And constant k3And by the formula t2＝K2×(θ2-α)+k3Calculating to obtain the tapping time t of the second stage2(ii) a Wherein the actual tilt angle θ of the first stage1Is greater than the angle alpha of the first stage of tapping and the actual tilting angle theta of the first stage2Greater than the final angle β; then according to the estimated tapping time t of the converter0And the last rest time t of the converterZAnd by the formula t3＝t0-tZCalculating to obtain the tapping time t of the third stage3(ii) a Wherein the actual tilt angle θ of the third stage3Equal to the final angle β; finally, according to the initial angle y of tapping and the actual tilting angle theta of the first stage1Actual tilt angle θ of the second stage2Final angle beta, tapping time t of the first stage1Tapping time t in the second stage2And tapping time t of the third stage3And drawing and obtaining a continuous tilting curve.
The method for planning the tilting curve of the converter tapping enables the molten steel to flow out of the tapping hole along with the tilting of the converter, can ensure enough molten steel depth, prevents steel slag from overflowing from the furnace hole, reduces manual labor, improves the quality of tapping efficiency, and can remarkably improve production benefits.
The converter tapping control method provided by the embodiment of the invention controls the converter tapping according to the tilting curve, and the beneficial effects can be referred to above, and are not described again here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a method for planning a tilting curve of tapping of a converter according to an embodiment of the present invention;
FIG. 2 is a three-dimensional structural view of a converter according to an embodiment of the present invention;
FIG. 3 is a flowchart for calculating an upper tapping initial angle limit of the converter and a lower tapping initial angle limit of the converter according to the embodiment of the present invention;
FIG. 4 is a diagram showing a correspondence between a lower limit of an initial tapping angle of a converter and an amount of molten steel according to an embodiment of the present invention;
FIG. 5 is a diagram showing a correspondence between an upper limit of an initial tapping angle of a converter and an amount of molten steel according to an embodiment of the present invention;
FIG. 6 is a tilting curve diagram of the tapping of the converter according to the example of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The method for planning the tilting curve of the converter tapping provided by the embodiment of the invention refers to the attached figure 1 of the specification, and comprises the following steps:
s1, determining the initial tapping angle y of the converter;
S2、according to the actual tilting angle theta of the converter in the first stage1The initial angle y of tapping and the first tapping time coefficient K1And by the formula t1＝K1×(θ1-y) calculating the tapping time t of the first stage1；
Wherein, aiming at the first tapping time coefficient K1According to a formula, the first tapping time coefficient K1Is (predicted tapping time t)0The x first-stage proportion x 1/3)/((tapping first-stage angle alpha-tapping initial angle y) x segmentation coefficient) is calculated. The first stage proportion and the section coefficient are determined according to the actual converter size, the production condition and historical data.
Of course, the first tapping time coefficient K1The method can be determined according to actual needs, is not limited to the above-mentioned calculation mode, and is not expanded herein.
S3, according to the actual tilting angle theta of the converter in the second stage2The angle alpha of the first stage of tapping and the time coefficient K of the second tapping2And constant k3And by the formula t2＝K2×(θ2-α)+k3Calculating to obtain the tapping time t of the second stage2；
Wherein the actual tilt angle θ of the first stage1The angle alpha is greater than the first stage angle alpha of tapping and is greater than the final angle beta; aiming at the second tapping time coefficient K2The second tapping time coefficient K2 can be set to (predicted tapping time t) according to the formula0X (1-first stage ratio) -last rest time tZ) Calculating to obtain a final angle beta-a first-stage tapping angle alpha; of course, the first tapping time coefficient K1It can be determined according to actual needs, and the text is not expanded.
For constant k3Can be calculated according to the formula number k3Estimated tapping time t0X first stage ratio, likewise, constant k3It can be determined according to actual needs, and the text is not expanded.
In addition to this, the actual tilting angle θ for the converter in the first phase1And the actual tilt angle theta in the second stage2Mean to turnThe tapping angle of the furnace in the first and second phases, respectively.
Actual tilting angle theta in the first stage during tapping1And the actual tilt angle theta in the second stage2Will change with the tapping time, the tilting speed will not be too slow, but because the weight limit of the converter can not be too fast, in practical application, on the premise of ensuring production safety, the tilting speed is improved as much as possible. Wherein the actual tilting angle theta of the converter in the first stage1Usually 79-90 DEG, the actual tilting angle theta of the converter in the second phase2Typically 90 to 103.
S4, estimating the tapping time t according to the converter0And the last rest time t of the converterZAnd by the formula t3＝t0–tZCalculating to obtain the tapping time t of the third stage3(ii) a Wherein the actual tilt angle θ of the third stage3Equal to said final angle β;
s5, according to the tapping time t of the first stage1The tapping time t of the second stage2And the tapping time t of the third stage3And drawing and obtaining a continuous tilting curve.
Before introducing the method for planning the tilting curve of the converter tapping, the general structure of the converter 100 will be briefly described, as shown in fig. 2 of the specification.
The converter 100 includes a tap hole 102 and a tap hole 101, and the converter 100 contains molten steel 900, and the molten steel 900 is dropped into the ladle 200 through the tap hole 102 by rotating the angle of the converter 100; as can be seen from the attached FIG. 2, under the action of gravity, the liquid level of the molten steel 900 is always parallel to the X axis, the Y axis is perpendicular to the X axis, and the initial tapping angle Y of the converter is the rotation angle of the converter 100 compared with the X axis.
It can be seen that if the initial angle y of tapping of the converter is too large (taking the tapping direction as a negative value for example), i.e. the tilting angle of the converter 100 is too small, the depth of the molten steel 900 above the tap hole 102 is not sufficient, resulting in slag entrapment at the tap hole 102; if the initial angle y of tapping is too small, slag and even steel overflow at the furnace mouth 101 is easily caused.
Therefore, in order to determine the more reasonable initial tapping angle y, many factors such as the amount of slag, the thickness of the initial slag layer, the thickness of the slag at the furnace mouth, the fluctuation range of the liquid level, and the like need to be considered according to the actual situation, that is, step S1.
In steps S2 to S4, consideration is made in three stages, the first stage being a slag surface fluctuation and a slag thickening period; at this stage, the initial angle of tapping y tends to approach the upper limit of the initial angle of tapping y due to the large fluctuation of the slag surface and the foaming of the initial slag1. The tilting angle gradually approaches the lower limit y of the initial tapping angle as the slag surface gradually stabilizes and the slag thickens2So as to increase the depth of the molten steel above the steel-tapping hole 102 and improve the steel-tapping efficiency.
In step S2, the actual tilt angle θ of the converter 100 in the first stage is used1Initial angle y of tapping and first tapping time coefficient K1And by the formula t1＝K1×(θ1-y) calculating the tapping time t of the first stage1。
In the first stage, the tilting curve can be fitted by using an exponential function, a polynomial function or a multi-segment linear function in conjunction with the description of fig. 6. First tapping time coefficient K1Can be determined according to the actual furnace condition.
In step S3, the actual tilting angle theta of the converter 100 in the second phase is used2The angle alpha of the first stage of tapping and the time coefficient K of the second tapping2And constant k3And by the formula t2＝K2×(θ2-α)+k3Calculating to obtain the tapping time t of the second stage2(ii) a Wherein the actual tilt angle θ of the first stage1Is greater than the angle alpha of the first stage of tapping and the actual tilting angle theta of the second stage2Greater than the final angle beta.
In the second stage, with reference to fig. 6 of the specification, since the slag surface is substantially stable and the depth of molten steel above the tap hole 102 is stabilized to the maximum, the planning curve at this stage can be fitted by a linear function, i.e. the tilting curve can be a linear functionNumber, second tapping time coefficient K2And constant k3Can be determined according to the actual furnace condition.
Wherein, the angle alpha of the first stage of tapping is obtained by comprehensive simulation and on-site actual data statistics, and is generally 88-90 degrees.
In the first stage, the actual tilt angle θ of the first stage1Greater than the tapping first stage angle alpha, in a second stage, the actual tilting angle theta of the second stage2Is larger than the final angle beta, the final angle beta is generally-100 degrees to-105 degrees, and fine adjustment can be carried out according to the tapping amount and the furnace condition.
In step S4, the steel tapping time t is estimated from the converter0And the last rest time t of the converterZAnd by the formula t3＝t0–tZCalculating to obtain the tapping time t of the third stage3(ii) a Wherein the actual tilt angle θ of the third stage3Equal to said final angle β;
in the third phase, the last rest time tZMay in particular be in the range of 15s to 25s, the last rest time tZIs set for avoiding the predicted tapping time t0Occurrence of positive deviation, i.e. predicted tapping time t0Is longer than the actual tapping time and can ensure a certain time for stabilizing the liquid level after reaching the final angle beta.
In step S5, the steel tapping initial angle y and the actual tilting angle theta of the first stage are determined1Actual tilt angle θ of the second stage2The final angle beta, the tapping time t of the first stage1The tapping time t of the second stage2And the tapping time t of the third stage3And (3) drawing and obtaining a continuous tilting curve, namely obtaining a change graph of the actual tilting angle at different stages along with time, as shown in the specification and attached figure 6.
Of course, in order to perfect the tilting curve of the converter tapping, an upper limit straight line and a lower limit straight line, namely an upper tapping limit and a lower tapping limit, can also be drawn.
In particular, according toThe estimated tapping time t0The second tapping time coefficient K2And the upper limit y of the tapping initial angle of the converter1And by the formula t0＝K2×(θM-y1) Calculating to obtain the actual tapping angle upper limit theta of the converterM；
According to the actual tapping angle upper limit thetaMDrawing the tapping time t to obtain a continuous upper limit straight line;
can also be based on the estimated tapping time t0The second tapping time coefficient K2And the lower limit y of the tapping initial angle of the converter2And by the formula t0＝K2×(θN-y2) Calculating to obtain the actual tapping angle lower limit theta of the converterN；
According to the actual tapping angle lower limit thetaNAnd drawing the tapping time t to obtain a continuous lower limit straight line.
The upper limit straight line and the lower limit straight line are shown in the attached figure 6 of the specification, and it is pointed out that the upper limit y of the initial angle of tapping is obtained1And lower limit of tapping initial angle y2On the premise that the slopes of the upper limit straight line and the lower limit straight line are equal to the slope of the second stage in the tilting curve, and the slopes are the second tapping time coefficient K2Therefore, an upper limit straight line and a lower limit straight line can be obtained, the upper limit straight line and the lower limit straight line have the significance of limiting the tilting angle in the tapping process, slag rolling or slag overflowing caused by too large or too small tapping angle is avoided, and the direct relation with the tapping time is avoided.
The tapping initial angle y of the converter can be obtained according to the tapping initial angle upper limit y of the converter 1001And the lower limit y of the tapping initial angle of the converter 1002And by the formula y ═ y (y)1+y2) And/2, calculating to obtain the initial tapping angle y of the converter 100.
Aiming at the upper limit y of the initial angle of tapping1And lower limit of tapping initial angle y2The specific obtaining mode of the method is a preferable setting mode, and can be determined comprehensively according to actual conditions and data such as experience.
In combination with the above, according to the principle that no slag runs from the furnace mouth and no slag is rolled up at the steel-tapping hole as the safety principle, assuming that the safety height of the molten steel from the furnace mouth is L and the depth of the molten steel at the steel-tapping hole is H, and modeling and calculating according to a furnace lining building diagram 3D to obtain the relationship between the initial steel-tapping angle y and the molten steel amount x, reference can be made to the description and the attached drawing 3.
In step S10, a three-dimensional converter diagram is established according to the actual converter lining on site; step S20, determining the molten steel amount 900 in the converter 100; step S30, performing a tilting simulation of the converter 100; step S40, acquiring the distance between the furnace mouth 101 and the molten steel 900; step S50, judging whether the distance is approximately equal to L, if so, determining the lower limit y of the initial tapping angle2That is, if not, step S60 returns to step S30 to repeat the procedure of performing the tilting simulation of converter 100 to optimize the tilting mode of converter 100. Step S40 may be performed simultaneously with step S70, that is, when it is judged that the depth between the tap-hole 102 and the molten steel 900 is H, the upper limit y of the initial angle of tapping may be determined1。
It can be seen that after the three-dimensional map of the converter 100 is established, the three-dimensional simulation calculation is performed according to the molten steel amount and the tilting angle of the converter, and the tilting initial angle and the molten steel amount are estimated according to the safety principle and the maximum ferrostatic pressure principle. The liquid level of the molten steel 900 is tilted toward the tap hole 102 and the taphole 101 with the rocking of the converter by cutting the converter surface at the determined molten steel charging amount, and when the liquid level at the tap hole 102 reaches the height H, the converter angle at that position is considered to be the upper limit y of the initial angle of tapping1And ensures that slag is not rolled in tapping. When the liquid surface is at a certain distance L from the position of the furnace mouth 101, the angle at that time is considered as the lower limit y of the initial angle of tapping2。
According to the relation formula for determining the molten steel amount and the initial angle, the data fitting is carried out on the plurality of molten steel amounts and the angle data, the data fitting can be a linear function or a nonlinear function, and for convenience of analysis, the data fitting is selected to be the linear function, y is ax + b, wherein x is the molten steel amount, a and b are a function coefficient and a function constant, and y is the initial angle of the tilting of the steel.
Different according to different angle definitionsThe function has three different functions of the upper limit, the lower limit and the tapping angle, the three functions respectively comprise different constants and coefficients, the tapping initial angle function is the mean function of the upper limit and the lower limit, namely the upper limit function is y1＝a1x+b1The lower limit function is y2＝a2x+b2The following table is data obtained by fitting analysis based on data from a certain steel mill.
Table one: lower limit of initial angle y of tapping2Corresponding relation with molten steel amount
The curve fitted according to the data in the first table is shown in figure 4 of the specification, and the lower limit y of the initial angle of tapping can be seen2And the amount x of molten steel.
The second table below is also data obtained by fitting analysis according to data of a certain steel mill, specifically, the upper limit y of the tapping initial angle1The corresponding relation with the molten steel amount x.
Correspondence between upper limit y1 of initial angle of tapping in table two and quantity x of molten steel
The curve fitted according to the data in the second table is shown in the attached figure 5 of the specification, and the upper limit y of the tapping initial angle can be seen1And the amount x of molten steel.
And (3) taking the average value according to the upper and lower limit angles corresponding to the molten steel quantity to obtain:
initial tilt angle: 0.0516 x-94.341.
Correspondence between the upper limit of tapping initial angle y1, the initial angle y, the lower limit of tapping initial angle y2, and the amount of molten steel, and correspondence between the amount of molten steel
Comprehensively, different angle values can be selected for the initial tapping angle y according to different molten steel quantities.
Estimated tapping time t for a converter0According to the tapping amount v of the converter in the unit time in the tapping process and the molten steel amount m of the steel in the furnace, the obtaining mode can be obtained through a formula t0Calculating the predicted tapping time t of the converter as m/v0。
The tapping amount v is the average tapping amount of 3-5 heats of the converter in a unit time in the tapping process; that is, the estimated tapping time t of the converter 100 is calculated by calculating the average tapping amount of 3 to 5 heats before the converter as the tapping amount v0。
The embodiment of the invention also provides a control method for converter tapping, which comprises the above-described planning method for the tilting curve of the converter tapping, and further comprises the following steps: and controlling converter tapping according to the tilting curve.
After the tilting curve is drawn, the tilting angle of the converter 100 may be adjusted in real time according to the lapse of time to ensure reliability of the tapping efficiency and the tapping efficiency.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The method for planning the tilting curve of the converter tapping and the method for controlling the converter tapping provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A method for planning a tilting curve of converter tapping is characterized by comprising the following steps:
determining the initial tapping angle y of the converter;
according to the actual tilting angle theta of the converter in the first stage1The initial angle y of tapping and the first tapping time coefficient K1And by the formula t1＝K1×(θ1-y) calculating the tapping time t of the first stage1；
According to the actual tilting angle theta of the converter in the second stage2The angle alpha of the first stage of tapping and the time coefficient K of the second tapping2And constant k3And by the formula t2＝K2×(θ2-α)+k3Calculating to obtain the tapping time t of the second stage2(ii) a Wherein the actual tilt angle θ of the first stage1Is greater than the angle alpha of the first stage of tapping and the actual tilting angle theta of the second stage2Greater than the final angle β;
according to the estimated tapping time t of the converter0And the last rest time t of the converterZAnd by the formula t3＝t0-tZCalculating to obtain the tapping time t of the third stage3(ii) a Wherein the actual tilt angle θ of the third stage3Equal to said final angle β;
according to the initial tapping angle y and the actual tilting angle theta of the first stage1Actual tilt angle θ of the second stage2The final angle beta, the tapping time t of the first stage1The tapping time t of the second stage2And the tapping time t of the third stage3And drawing and obtaining a continuous tilting curve.
2. The method for planning a tilting curve of converter tapping according to claim 1, characterized in that it further comprises:
according to the estimated tapping time t0The second tapping time coefficient K2And the upper limit of the tapping initial angle of the convertery1And by the formula t0＝K2×(θM-y1) Calculating to obtain the actual tapping angle upper limit theta of the converterM；
According to the actual tapping angle upper limit thetaMDrawing the tapping time t to obtain a continuous upper limit straight line;
and/or the presence of a gas in the gas,
according to the estimated tapping time t0The second tapping time coefficient K2And the lower limit y of the tapping initial angle of the converter2And by the formula t0＝K2×(θN-y2) Calculating to obtain the actual tapping angle lower limit theta of the converterN；
According to the actual tapping angle lower limit thetaNAnd drawing the tapping time t to obtain a continuous lower limit straight line.
3. Method for planning a tilting curve of the tapping of a converter according to claim 1, characterized in that said step of determining the initial angle y of tapping of the converter comprises:
according to the upper limit y of the tapping initial angle of the converter1And the lower limit y of the tapping initial angle of the converter2And by the formula y ═ y (y)1+y2) And/2, calculating to obtain the initial tapping angle y of the converter.
4. Method for planning a tilting curve of the converter tap according to claim 2, characterised in that said upper tap initial angle limit y1And a lower limit y of the tapping initial angle of the converter2The acquisition mode comprises the following steps:
determining the quantity of molten steel of the converter, the safety height L between a converter mouth of the converter and the molten steel and the depth H between a steel-tapping hole of the converter and the molten steel on the premise of not rolling slag;
obtaining the lower limit y of the tapping initial angle of the converter according to the safety height L2And obtaining the upper limit y of the tapping initial angle according to the depth H1。
5. Method for planning a tilting curve of the tapping of a converter according to claim 4, characterised in that said lower limit y of the initial angle of tapping of said converter is obtained as a function of said safety height L2And obtaining the upper limit y of the tapping initial angle according to the depth H1The method comprises the following steps:
according to the tilting simulation carried out by the three-dimensional model of the converter, the lower limit y of the tapping initial angle of the converter is obtained according to the safety height L2And obtaining the upper limit y of the tapping initial angle according to the depth H1。
6. Method for planning a tilting curve of the tapping of a converter according to any one of claims 1 to 5, characterized in that said predicted tapping time t of the converter0The acquisition mode comprises the following steps:
according to the tapping amount v of the converter in the unit time during tapping and the molten steel amount m of the steel in the furnace, and through the formula t0Calculating the predicted tapping time t of the converter as m/v0。
7. Method for planning a tilting curve of the converter tap according to any one of claims 1 to 5, characterized in that said final angle β is in the range-100 ° to-105 ° and/or said final resting time tZSpecifically in the range of 15s to 25 s.
8. Method for planning a tilting curve of the tapping of a converter according to claim 6, characterized in that the tapping quantity v is embodied as the average tapping quantity per unit time during tapping of a plurality of heats of the converter.
9. A method for controlling tapping from a converter, comprising the method for planning a tilting curve of tapping from a converter according to any one of claims 1 to 8, characterized in that it further comprises:
and controlling converter tapping according to the tilting curve.
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