CN110781566B - Hearth iron solidification layer calculation method, hearth iron solidification layer calculation system, storage medium and electronic terminal - Google Patents
Hearth iron solidification layer calculation method, hearth iron solidification layer calculation system, storage medium and electronic terminal Download PDFInfo
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- CN110781566B CN110781566B CN201911002343.0A CN201911002343A CN110781566B CN 110781566 B CN110781566 B CN 110781566B CN 201911002343 A CN201911002343 A CN 201911002343A CN 110781566 B CN110781566 B CN 110781566B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
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- C21—METALLURGY OF IRON
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Abstract
The invention discloses a method and a system for calculating a hearth iron condensation layer, wherein the method comprises the following steps: determining the geometric boundary, boundary conditions and initial carbon brick position curve and initial molten iron solidification line position calculated by a hearth erosion model; obtaining a temperature field inside the carbon brick according to the temperature of an initial carbon brick type, a furnace hearth carbon brick thermocouple, an initial molten iron solidification line position, an initial carbon brick position curve and boundary conditions, wherein the temperature field at least comprises a molten iron solidification line and a carbon brick erosion curve; and judging whether a solidified iron layer or corrosion exists according to the molten iron solidification line and the carbon brick corrosion curve. Based on the heat conduction characteristic of the carbon brick, the invention calculates the carbon brick erosion curve and the molten iron solidification line by using the global hearth erosion model, so that the internal condition of the hearth can be known more accurately.
Description
Technical Field
The invention relates to the technical field of long service life of blast furnaces, in particular to a furnace hearth iron solidification layer calculation method, a system, a storage medium and an electronic terminal.
Background
At present, the long-life management of the blast furnace hearth mainly has two aspects of work: 1. calculating the thickness of a residual brick lining of a hearth by using a hearth erosion model, and judging the hearth erosion condition according to the thickness of the carbon brick so as to take proper furnace protection measures; 2. and judging abnormal conditions in the hearth carbon bricks, such as carbon brick heat conductivity coefficient change, ring crack, air gap and iron seepage, according to the temperature of the thermocouple of the hearth carbon bricks in the hearth carbon bricks. For the first aspect, in the prior art, the erosion thickness of the carbon bricks is determined, and the thickness of the iron gel layer, the air gap state, the erosion reason of the hearth carbon bricks and the furnace protection measures are not studied; for the second aspect, in the prior art, when the heat flux density algorithm is adopted, the heat flux density algorithm is calculated according to cooling water, and the cooling water represents the average heat flux density of a region, so that the state of a certain place is judged, and the error is larger.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a hearth setting layer calculating method, system, storage medium and electronic terminal for solving at least one of the drawbacks of the prior art.
To achieve the above and other related objects, the present invention provides a hearth iron layer calculating method, comprising:
determining the geometric boundary, boundary conditions and initial carbon brick position curve and initial molten iron solidification line position calculated by a hearth erosion model;
obtaining a temperature field inside the carbon brick according to the temperature of an initial carbon brick type, a furnace hearth carbon brick thermocouple, an initial molten iron solidification line position, an initial carbon brick position curve and boundary conditions, wherein the temperature field at least comprises a molten iron solidification line and a carbon brick erosion curve;
and judging whether a solidified iron layer or corrosion exists according to the molten iron solidification line and the carbon brick corrosion curve.
Optionally, the method further comprises:
comparing the difference value between the calculated value and the measured value of the temperature field in the carbon brick with a set error;
and if the difference value between the calculated value and the measured value of the temperature field in the carbon brick is larger than the set error, adjusting the positions of the molten iron solidification line and the carbon brick erosion curve until the difference value between the calculated value and the measured value of the temperature field in the carbon brick is smaller than the set error.
Optionally, the determining that there is a solidified iron layer or erosion according to the molten iron solidification line and the carbon brick erosion curve includes:
respectively calculating the distance from a central point to a certain point on a molten iron solidification line and the distance from a certain point on a carbon brick erosion curve, wherein the central point is the intersection point of the center line of a hearth and the center line of a tap hole; a certain point on the molten iron solidification line and a certain point on the carbon brick erosion curve are on the same line with the central point;
if the distance from the center point to the molten iron solidification line is larger than the distance from the center point to the carbon brick invasion curve, the point is provided with a solidified iron layer, otherwise, erosion exists.
Optionally, the method further comprises:
and calculating the thickness of the iron gel layer or/and the residual thickness of the carbon brick.
Optionally, taking a second norm of the iron oxide layer thickness at the point representing the iron oxide layer to obtain a hearth iron oxide layer index; the residual thickness of the carbon brick at the point where erosion exists is two norms to obtain the hearth erosion index.
Optionally, the iron bed, hearth iron bed index, carbon brick residual thickness, hearth erosion index are visualized.
To achieve the above and other related objects, the present invention provides a hearth iron layer calculation system comprising:
the parameter selection module is used for determining the geometric boundary, boundary conditions and initial carbon brick position curve and initial molten iron solidification line position calculated by the hearth erosion model;
the temperature field calculation module is used for obtaining a temperature field inside the carbon brick according to the temperature of the initial carbon brick type, the temperature of the furnace hearth carbon brick thermocouple, the initial molten iron solidification line position, the initial carbon brick position curve and the boundary condition, wherein the temperature field at least comprises the molten iron solidification line and the carbon brick erosion curve;
and the state judging module is used for judging that a solidified iron layer or corrosion exists according to the molten iron solidification line and the carbon brick corrosion curve.
Optionally, the system further comprises:
the comparison module is used for comparing the difference value between the calculated value and the measured value of the temperature field in the carbon brick with a set error;
and the adjusting module is used for adjusting the positions of the molten iron solidification line and the carbon brick erosion curve until the difference value between the calculated value and the measured value of the temperature field in the carbon brick is smaller than the set error when the difference value between the calculated value and the measured value of the temperature field in the carbon brick is larger than the set error.
Optionally, the determining that there is a solidified iron layer or erosion according to the molten iron solidification line and the carbon brick erosion curve includes:
respectively calculating the distance from a central point to a certain point on a molten iron solidification line and the distance from a certain point on a carbon brick erosion curve, wherein the central point is the intersection point of the center line of a hearth and the center line of a tap hole; a certain point on the molten iron solidification line and a certain point on the carbon brick erosion curve are on the same line with the central point;
if the distance from the center point to the molten iron solidification line is larger than the distance from the center point to the carbon brick invasion curve, the point is provided with a solidified iron layer, otherwise, erosion exists.
Optionally, the system further comprises:
and the thickness calculation module is used for calculating the thickness of the iron gel layer or/and the residual thickness of the carbon brick.
Optionally, the system further comprises an index calculation module for performing a two-norm on the thickness of the iron-solidifying layer at the point representing the iron-solidifying layer to obtain a hearth iron-solidifying layer index; the index calculation module is also used for performing a second norm on the residual thickness of the carbon bricks at the points where erosion exists so as to obtain a hearth erosion index.
Optionally, the system further comprises a visualization module for visualizing the iron layer, hearth iron layer index, carbon brick residual thickness, and hearth erosion index.
To achieve the above and other related objects, the present invention provides a storage medium storing a computer program which, when executed by a processor, performs the method.
To achieve the above and other related objects, the present invention provides an electronic terminal comprising: a processor and a memory;
the memory is used for storing a computer program, and the processor is used for executing the computer program stored in the memory so as to enable the terminal to execute the method.
As described above, the hearth iron condensation layer calculation method, the hearth iron condensation layer calculation system, the storage medium and the electronic terminal have the following beneficial effects:
the invention provides objective and quantitative basis for knowing the hearth condition in the blast furnace smelting process, helps blast furnace operators to know the erosion condition and reason of the hearth in time, and adopts proper operation measures to prolong the service life of the blast furnace.
Drawings
FIG. 1 is a flow chart of a method for calculating a hearth solidified iron layer according to an embodiment of the present invention;
FIG. 2 is a schematic view of the temperature field inside a carbon brick according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a hearth iron layer calculation system in accordance with an embodiment of the present invention.
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. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In the smelting activity of the blast furnace, the hearth part is continuously washed by the circulation of molten iron, which is the biggest factor in a plurality of parts affecting the service life of the blast furnace, and the service life of the hearth directly determines the service life of the blast furnace to a great extent, so that the service life of the hearth is ensured to be as long as possible, and the method has important significance for prolonging the service time of the blast furnace.
The furnace hearth is internally provided with a high-temperature area, the means for monitoring the internal state of the furnace hearth is very limited, and the main stream method is to indirectly know the internal condition of the furnace hearth by monitoring the water temperature change of the cooling wall of the furnace hearth carbon bricks. However, because the hearth has a solidified iron layer and air gaps, the accuracy of water temperature difference is very questionable, and the hearth condition can be judged only as an auxiliary means.
Therefore, the invention provides a furnace hearth iron solidification layer calculating method, which is based on the heat conduction characteristics of carbon bricks, calculates a carbon brick erosion curve and a molten iron solidification line by using a global furnace hearth erosion model, and can more accurately know the internal condition of a furnace hearth. Furthermore, changes in hearth erosion can be continuously tracked through historical data.
Specifically, as shown in fig. 1, the calculation method includes:
s11, determining a geometric boundary, boundary conditions and an initial carbon brick position curve and an initial molten iron solidification line position calculated by a hearth erosion model;
s12, obtaining a temperature field inside the carbon brick according to the temperature of an initial carbon brick type, a furnace hearth carbon brick thermocouple, an initial molten iron solidification line position, an initial carbon brick position curve and boundary conditions, wherein the temperature field at least comprises a molten iron solidification line and a carbon brick erosion curve;
s13, judging that a solidified iron layer or erosion exists according to the molten iron solidification line and the carbon brick erosion curve. The iron-solidifying layer is the molten iron solidified when the temperature of the molten iron is lower than 1150 ℃. In the calculated temperature field, a plurality of curves respectively represent different temperatures, a curve representing 1150 ℃ is a molten iron solidification line, the position of the molten iron solidification line changes along with the production, and when the calculated molten iron solidification line is positioned in the carbon brick, the molten iron solidification line is a carbon brick erosion curve. And the carbon brick erosion curve is a curve representing the maximum erosion position calculated in one period.
The invention provides objective and quantitative basis for knowing the hearth condition in the blast furnace smelting process, helps blast furnace operators to know the erosion condition and reason of the hearth in time, and adopts proper operation measures to prolong the service life of the blast furnace.
The following describes step S11 to step S13 in detail.
In step S12, the temperature of the initial carbon brick type, the temperature of the furnace hearth carbon brick thermocouple, the initial molten iron solidification line position, the initial carbon brick position curve and the boundary condition are input, the temperature field inside the solid carbon brick is calculated by using a finite element method, the result contains the molten iron solidification line (i.e. 1150 ℃ line-curve 1 in fig. 2), and the initial carbon brick maximum erosion curve defaults to the initial carbon brick inner boundary-curve 2 in fig. 1.
In some embodiments, to improve the accuracy of the calculation, the calculation method further includes:
comparing the difference value between the calculated value and the measured value of the temperature field in the carbon brick with a set error;
and if the difference value between the calculated value and the measured value of the temperature field in the carbon brick is larger than the set error, adjusting the positions of the molten iron solidification line and the carbon brick erosion curve until the difference value between the calculated value and the measured value of the temperature field in the carbon brick is smaller than the set error.
In some embodiments, the determining that there is a layer of iron or erosion based on the molten iron solidification line and the carbon block erosion curve includes:
respectively calculating the distance from a central point to a certain point on a molten iron solidification line and the distance from a certain point on a carbon brick erosion curve, wherein the central point is the intersection point of the center line of a hearth and the center line of a tap hole; a certain point on the molten iron solidification line and a certain point on the carbon brick erosion curve are on the same line with the central point;
if the distance from the center point to the molten iron solidification line is larger than the distance from the center point to the carbon brick invasion curve, the point is provided with a solidified iron layer, otherwise, erosion exists.
For example, as shown in fig. 2, the point C (the abscissa is 0 and the ordinate is 10) is the center point, and the center point C is taken as a ray, the ray intersects the curve 1 at the point B1 and intersects the curve 2 at the point A1, and comparing the lengths of the line segment CA1 and the line segment CB1, it is obvious that the line segment CA1 is larger than the line segment CB1, and it can be understood that there is erosion at the position of the point. For another example, taking the center point C as a starting point, the ray intersects the curve 1 at the point B2 and intersects the curve 2 at the point A2, and comparing the lengths of the line segment CA2 and the line segment CB2, it is obvious that the line segment CA2 is larger than the line segment CB2, and it can be understood that there is erosion at the position of the point. Similarly, N rays can be made, respectively intersecting curve 1 at B N Intersecting curve 2 at A N At this time, compare line segment CB N And line segment CA N To determine whether there is a layer of iron condensate or erosion at these points, i.e. when CB N -CA N Above 0, a layer of iron is present; when CB N -CA N Below 0, erosion is present.
After judging whether the iron-condensing layer exists or the corrosion exists, the thickness of the iron-condensing layer and the residual thickness of the carbon brick can be calculated.
In fig. 2, the length of the gauge line CB1 is d1, the length of the gauge line CA1 is d2, the difference between d1 and d2 is d, if d is greater than 0, the layer is the gel layer, and the thickness of the gel layer is d; if d is less than 0, where there is erosion, then |d| represents the thickness of the erosion, and the distance from the point to the outer boundary of the carbon brick is the residual thickness of the carbon brick.
In some embodiments, the hearth layer index and the hearth erosion index are further calculated based on the iron layer thickness and carbon brick residue thickness calculations. The implementation method is as follows:
and respectively taking the thicknesses of the N-position iron-condensing layers and the residual thicknesses of the N-position carbon bricks as two norms to obtain a hearth iron-condensing layer index and a hearth erosion index.
Specifically, assume a N-point gel layer thickness d 1 ,d 2 ,...,d n The hearth iron layer index can be expressed as
Similarly, assume that the residual thickness of the carbon brick is l at N points 1 ,l 2 ,...,l n The hearth erosion index can be expressed as
In some embodiments, the N positions of the iron layer, the hearth iron layer index, the N positions of the residual carbon brick thickness, and the hearth erosion index are visualized, and the iron layer and residual thickness data can be visualized according to different positions to represent the overall change trend.
As shown in fig. 3, the present invention provides a hearth set iron layer calculation system comprising:
the parameter selection module 11 is used for determining the geometric boundary, boundary conditions and initial carbon brick position curve and initial molten iron solidification line position calculated by the hearth erosion model;
a temperature field calculation module 12, configured to obtain a temperature field inside the carbon brick according to the temperature of the initial carbon brick type, the temperature of the furnace hearth carbon brick thermocouple, the initial molten iron solidification line position, the initial carbon brick position curve and the boundary condition, where the temperature field at least includes a molten iron solidification line and a carbon brick erosion curve;
the temperature of the initial carbon brick type, the temperature of the furnace hearth carbon brick thermocouple, the initial molten iron solidification line position, the initial carbon brick position curve and the boundary condition are input, the temperature field inside the solid carbon brick is calculated by using a finite element method, the result contains the molten iron solidification line (namely 1150 ℃ line-curve 1 in fig. 2), and the initial carbon brick maximum erosion curve defaults to the inner boundary of the initial carbon brick-curve 2 in fig. 1.
And the state judging module 13 is used for judging that a solidified iron layer or erosion exists according to the molten iron solidification line and the carbon brick erosion curve.
Specifically, the determining that there is a solidified iron layer or erosion according to the molten iron solidification line and the carbon brick erosion curve includes:
respectively calculating the distance from a central point to a certain point on a molten iron solidification line and the distance from a certain point on a carbon brick erosion curve, wherein the central point is the intersection point of the center line of a hearth and the center line of a tap hole; a certain point on the molten iron solidification line and a certain point on the carbon brick erosion curve are on the same line with the central point;
if the distance from the center point to the molten iron solidification line is larger than the distance from the center point to the carbon brick invasion curve, the point is provided with a solidified iron layer, otherwise, erosion exists.
For example, as shown in fig. 2, the point C is the center point (the abscissa is 0 and the ordinate is 10), the center point C is taken as a ray, the ray intersects the curve 1 at the point B1 and intersects the curve 2 at the point A1, and comparing the lengths of the line segment CA1 and the line segment CB1, it is obvious that the line segment CA1 is smaller than the line segment CB1, and it can be understood that the position of the point has the iron condensation layer. For another example, taking the center point C as a starting point, the ray intersects the curve 1 at the point B2 and intersects the curve 2 at the point A2, and comparing the lengths of the line segments CA2 and CB2, it is obvious that the line segment CA2 is smaller than the line segment CB2, and it can be understood that the position of the point has the iron layer. Similarly, N rays can be made, respectively intersecting curve 1 at B N Intersecting curve 2 at A N At this time, compare line segment CB N And line segment CA N To determine whether there is a layer of iron condensate or erosion at these points.
In some embodiments, the system further comprises:
the comparison module is used for comparing the difference value between the calculated value and the measured value of the temperature field in the carbon brick with a set error;
and the adjusting module is used for adjusting the positions of the molten iron solidification line and the carbon brick erosion curve until the difference value between the calculated value and the measured value of the temperature field in the carbon brick is smaller than the set error when the difference value between the calculated value and the measured value of the temperature field in the carbon brick is larger than the set error.
In some embodiments, the system further comprises:
and the thickness calculation module is used for calculating the thickness of the iron gel layer or/and the residual thickness of the carbon brick.
In fig. 2, the length of the gauge line CB1 is d1, the length of the gauge line CA1 is d2, the difference between d1 and d2 is d, if d is greater than 0, the layer is the gel layer, and the thickness of the gel layer is d; if d is less than 0, where there is erosion, then |d| represents the thickness of the erosion, and the distance from the point to the outer boundary of the carbon brick is the residual thickness of the carbon brick.
In some embodiments, the system further comprises an index calculation module for bi-norming the thickness of the iron oxide layer at the point representing the iron oxide layer to obtain a hearth iron oxide layer index; the index calculation module is also used for performing a second norm on the residual thickness of the carbon bricks at the points where erosion exists so as to obtain a hearth erosion index.
Specifically, assume a N-point gel layer thickness d 1 ,d 2 ,...,d n The hearth iron layer index can be expressed as
Similarly, assume that the residual thickness of the carbon brick is l at N points 1 ,l 2 ,...,l n The hearth erosion index can be expressed as
In some embodiments, the system further comprises a visualization module for visualizing the iron layer, hearth iron layer index, carbon brick residual thickness, and hearth erosion index.
Since the embodiments of the apparatus portion and the embodiments of the method portion correspond to each other, the contents of the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory ((RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, etc.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (12)
1. A method for calculating a hearth solidified iron layer, the method comprising:
determining the geometric boundary, boundary conditions and initial carbon brick position curve and initial molten iron solidification line position calculated by a hearth erosion model;
obtaining a temperature field inside the carbon brick according to the temperature of an initial carbon brick type, a furnace hearth carbon brick thermocouple, an initial molten iron solidification line position, an initial carbon brick position curve and boundary conditions, wherein the temperature field at least comprises a molten iron solidification line and a carbon brick erosion curve;
judging whether a solidified iron layer or corrosion exists according to the molten iron solidification line and the carbon brick corrosion curve;
judging that a solidified iron layer or corrosion exists according to the molten iron solidification line and the carbon brick corrosion curve, and comprising the following steps:
respectively calculating the distance from a central point to a certain point on a molten iron solidification line and the distance from a certain point on a carbon brick erosion curve, wherein the central point is the intersection point of the center line of a hearth and the center line of a tap hole; a certain point on the molten iron solidification line and a certain point on the carbon brick erosion curve are on the same line with the central point;
if the distance from the center point to the molten iron solidification line is larger than the distance from the center point to the carbon brick invasion curve, the point is provided with a solidified iron layer, otherwise, erosion exists.
2. The hearth setting bed calculation method according to claim 1, further comprising:
comparing the difference value between the calculated value and the measured value of the temperature field in the carbon brick with a set error;
and if the difference value between the calculated value and the measured value of the temperature field in the carbon brick is larger than the set error, adjusting the positions of the molten iron solidification line and the carbon brick erosion curve until the difference value between the calculated value and the measured value of the temperature field in the carbon brick is smaller than the set error.
3. The hearth setting bed calculation method according to claim 1, further comprising:
and calculating the thickness of the iron gel layer or/and the residual thickness of the carbon bricks.
4. A hearth setting bed calculation method according to claim 3, wherein the setting bed thickness at the point representing the setting bed is subjected to a two-norm to obtain a hearth setting bed index; and (5) taking the residual thickness of the carbon brick at the point where erosion exists as a second norm to obtain the hearth erosion index.
5. The method for calculating a hearth setting bed according to claim 4, wherein the setting bed, the hearth setting bed index, the residual carbon brick thickness, and the hearth erosion index are visualized.
6. A hearth set iron layer calculation system, the system comprising:
the parameter selection module is used for determining the geometric boundary, boundary conditions and initial carbon brick position curve and initial molten iron solidification line position calculated by the hearth erosion model;
the temperature field calculation module is used for obtaining a temperature field inside the carbon brick according to the temperature of the initial carbon brick type, the temperature of the furnace hearth carbon brick thermocouple, the initial molten iron solidification line position, the initial carbon brick position curve and the boundary condition, wherein the temperature field at least comprises the molten iron solidification line and the carbon brick erosion curve;
the state judging module is used for judging whether a solidified iron layer or corrosion exists according to the molten iron solidification line and the carbon brick corrosion curve;
judging that a solidified iron layer or corrosion exists according to the molten iron solidification line and the carbon brick corrosion curve, and comprising the following steps:
respectively calculating the distance from a central point to a certain point on a molten iron solidification line and the distance from a certain point on a carbon brick erosion curve, wherein the central point is the intersection point of the center line of a hearth and the center line of a tap hole; a certain point on the molten iron solidification line and a certain point on the carbon brick erosion curve are on the same line with the central point;
if the distance from the center point to the molten iron solidification line is larger than the distance from the center point to the carbon brick invasion curve, the point is provided with a solidified iron layer, otherwise, erosion exists.
7. The hearth set forth in claim 6, further comprising:
the comparison module is used for comparing the difference value between the calculated value and the measured value of the temperature field in the carbon brick with a set error;
and the adjusting module is used for adjusting the positions of the molten iron solidification line and the carbon brick erosion curve until the difference value between the calculated value and the measured value of the temperature field in the carbon brick is smaller than the set error when the difference value between the calculated value and the measured value of the temperature field in the carbon brick is larger than the set error.
8. The hearth set forth in claim 6, further comprising:
and the thickness calculation module is used for calculating the thickness of the iron gel layer or/and the residual thickness of the carbon brick.
9. The hearth layer calculation system of claim 8, further comprising an index calculation module for bi-norming the layer thickness at the point representing the layer to obtain a hearth layer index; the index calculation module is also used for performing a second norm on the residual thickness of the carbon bricks at the points where erosion exists so as to obtain a hearth erosion index.
10. The hearth set forth in claim 9 further comprising a visualization module for visualizing the set forth, hearth set forth index, carbon brick residual thickness, hearth erosion index.
11. A storage medium storing a computer program which, when executed by a processor, performs the method of any one of claims 1 to 5.
12. An electronic terminal, comprising: a processor and a memory;
the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory, so as to cause the terminal to perform the method according to any one of claims 1 to 5.
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