CN114480753B - Diagnosis method, device and equipment for molten iron splashed from blast furnace taphole - Google Patents
Diagnosis method, device and equipment for molten iron splashed from blast furnace taphole Download PDFInfo
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- CN114480753B CN114480753B CN202210093792.6A CN202210093792A CN114480753B CN 114480753 B CN114480753 B CN 114480753B CN 202210093792 A CN202210093792 A CN 202210093792A CN 114480753 B CN114480753 B CN 114480753B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2300/00—Process aspects
- C21B2300/04—Modeling of the process, e.g. for control purposes; CII
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Abstract
The embodiment of the invention provides a method, a device and equipment for diagnosing molten iron splashed from a blast furnace taphole. A plurality of reference index ranges are preset, and the splash reason is set for each reference index range. After first pressure data in a tapping hole channel and hot air pressure data of an air port position are obtained, an evaluation index value for representing the reason of molten iron splashing on a tapping hole is determined, a target reference index range where the evaluation index value is located is determined from a plurality of preset reference index ranges, and then the splashing reason corresponding to the target reference index range is determined as the actual reason of the current molten iron splashing on the tapping hole of the blast furnace. Compared with the existing method for judging the reason of splashing only by depending on experience, the method and the device provided by the embodiment of the invention judge the reason of splashing molten iron at the taphole by depending on the pressure in the taphole of the blast furnace and the pressure at the tuyere of the blast furnace, so that the reason of splashing molten iron at the taphole is more accurate.
Description
Technical Field
The invention relates to the technical field of smelting, in particular to a method, a device and equipment for diagnosing molten iron splashed from a blast furnace taphole.
Background
The iron tapping efficiency of the blast furnace is seriously affected by the splashing at the iron tapping hole of the blast furnace, especially for large or huge blast furnaces.
The iron notch of blast furnace has the splash phenomenon (mix with the coal gas in the molten iron stream, reduce in the twinkling of an eye in iron notch department pressure, cause a phenomenon of splash) in current production, and the splash not only causes equipment to damage easily, more can make the decline of tapping efficiency, has seriously restricted the production efficiency of blast furnace.
However, in the prior art, the reasons for the splashing of the blast furnace taphole are mainly determined by experience, which often cannot accurately determine the reasons for the splashing of the blast furnace taphole, so that the blast furnace taphole cannot be accurately managed in time.
Disclosure of Invention
The embodiment of the invention provides a method, a device and equipment for diagnosing molten iron splashed from a blast furnace taphole, and solves the technical problem of low accuracy in judging the reason of the molten iron splashed from the blast furnace taphole in the related technology.
In a first aspect, the present invention provides a method for diagnosing molten iron splashing from a taphole of a blast furnace, wherein the blast furnace is provided with a taphole duct and a tuyere, the taphole duct is connected to the taphole of the blast furnace, and the method comprises: acquiring first pressure data in the tapping hole channel and acquiring hot air pressure data of the air port position; determining an evaluation index value for representing the reason of molten iron splashing from the taphole based on the first pressure data and the hot air pressure data; determining a target reference index range in which the evaluation index value is located from a plurality of preset reference index ranges, wherein each reference index range corresponds to a splash reason; and determining the splashing reason corresponding to the target reference index range as the actual reason of the current molten iron splashed from the blast furnace taphole.
Preferably, said obtaining first pressure data within said tapping hole includes: acquiring second pressure data of the position of the taphole; obtaining pressure compensation data based on the depth of the taphole, the included angle between the taphole and a horizontal line and the on-way resistance loss value in the tapping hole channel; determining the first pressure data based on the second pressure data and the pressure compensation data.
Preferably, the obtaining of the on-way resistance loss value in the tapping hole channel comprises: and obtaining an on-way resistance loss value in the tapping hole channel based on the depth of the tapping hole, the diameter of the tapping hole channel, the on-way resistance coefficient of the tapping hole channel and the actual flow rate of the molten iron in the tapping hole channel.
Preferably, the obtaining of the on-way resistance coefficient of the tapping hole comprises: and obtaining the on-way resistance coefficient of the tapping hole channel based on the absolute roughness of the tapping hole channel, the diameter of the tapping hole channel and the Reynolds number of the iron slag in the tapping hole channel.
Preferably, the reynolds number of the iron slag in the iron tapping hole channel comprises the following steps: and obtaining the Reynolds number of the iron slag in the tapping hole channel based on the diameter of the tapping hole channel and the comprehensive density, flow speed and dynamic viscosity of the molten iron in the tapping hole channel.
Preferably, the obtaining of the comprehensive density of the molten iron in the tapping hole comprises: and obtaining the comprehensive density of the molten iron in the tapping hole channel based on the conventional density of the molten iron in the tapping hole channel, the ratio of the iron slag in the tapping hole channel and the conventional density of the iron slag in the tapping hole channel.
Preferably, the plurality of reference index ranges includes a first reference index range, and a second reference index range having a lower limit value larger than an upper limit value of the first reference index range; the determining the splashing reason corresponding to the target reference index range as the actual reason of the molten iron splashed at the current taphole of the blast furnace comprises the following steps: if the evaluation index value is in the first reference index range, determining that the actual reason is the furnace wall gas leakage; and if the evaluation index value is within the second reference index range, determining that the actual reason is that the hearth is inactive.
Preferably, the determining an evaluation index value for characterizing a cause of molten iron splashing at the taphole based on the first pressure data and the hot blast pressure data includes: obtaining the evaluation index value based on the ratio of the first pressure data to the hot air pressure data;
after the actual reason is determined to be the furnace wall gas leakage, the method further comprises the following steps: carrying out grouting treatment on the blast furnace to repair the position of the furnace wall with gas leakage;
after the determining that the actual cause is hearth inactivity, further comprising: optimizing the coke quality of the blast furnace or reducing the coke load of the blast furnace to increase the hearth activity of the blast furnace.
In a second aspect, the present invention provides an apparatus for diagnosing molten iron splashing from a taphole of a blast furnace, the blast furnace being provided with a taphole and a tuyere, the taphole being connected to the taphole of the blast furnace, the apparatus comprising:
the data acquisition unit is used for acquiring first pressure data in the tapping hole channel and acquiring hot air pressure data of the air port position;
an evaluation index determination unit, configured to determine an evaluation index value for characterizing a reason for molten iron splashing at the taphole based on the first pressure data and the hot blast pressure data;
the splash reason determining unit is used for determining a target reference index range in which the evaluation index value is located from a plurality of preset reference index ranges, and each reference index range corresponds to a splash reason; and determining the splashing reason corresponding to the target reference index range as the actual reason of the current molten iron splashed from the blast furnace taphole.
In a third aspect, the present invention provides a computer device, which includes a memory, a processor, and code stored in the memory and executable on the processor, and the processor implements any one of the embodiments of the first aspect when executing the code.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
the method comprises the steps of firstly obtaining first pressure data in a tapping hole channel and obtaining hot air pressure data of an air port position. Then, based on the first pressure data and the hot blast pressure data, an evaluation index value for representing the reason of molten iron splashing from the taphole is determined, and a target reference index range in which the evaluation index value is located is determined from a plurality of preset reference index ranges. Because each reference index range corresponds to the corresponding splash reason, the corresponding splash reason of the target reference index range can be determined as the actual reason of the current molten iron splashed by the blast furnace taphole. Compared with the existing method for judging the reason of splashing only by depending on experience, the method and the device provided by the embodiment of the invention judge the reason of splashing molten iron at the taphole by depending on the pressure in the taphole of the blast furnace and the pressure at the tuyere of the blast furnace, so that the reason of splashing molten iron at the taphole is more accurate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flowchart of a method for diagnosing molten iron splashing on a taphole of a blast furnace according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the construction of an apparatus for diagnosing molten iron splashing from a taphole of a blast furnace according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a computer device structure according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method, a device and equipment for diagnosing molten iron splashed from a blast furnace taphole, and solves the technical problem of low accuracy in judging the reason of the molten iron splashed from the blast furnace taphole in the related technology.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
the method comprises the steps of firstly obtaining first pressure data in a tapping hole channel and obtaining hot air pressure data of an air port position.
And then, determining an evaluation index value for representing the reason of molten iron splashing at the taphole based on the first pressure data and the hot air pressure data, and determining a target reference index range in which the evaluation index value is positioned from a plurality of preset reference index ranges.
The reasons for splashing are preset in each reference index range, so that the reasons for splashing corresponding to the target reference index range can be determined as the actual reasons for the currently splashed molten iron at the taphole of the blast furnace.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
In a first aspect, the present invention provides a method for diagnosing molten iron splashing from a taphole of a blast furnace, which can be applied to a blast furnace having a tapping hole and a tuyere, wherein the tapping hole is connected to the taphole of the blast furnace, and the blast furnace can be used for smelting iron ore to obtain molten iron.
Referring to fig. 1, the diagnostic method may include the following steps S101 to S104:
step S101: and acquiring first pressure data in the tapping hole channel and acquiring hot air pressure data of the air port position.
The first pressure data may include the gas pressure within the tapping channel, but it is inconvenient to use a sensor within the tapping channel to obtain the first pressure data. Specifically, how to obtain the first pressure data in the tapping hole can be obtained through the following steps A1 to A3:
a1: and acquiring second pressure data of the position of the taphole.
Due to the taphole, in particular, the air pressure sensor may be used to obtain second pressure data of the taphole position, which may comprise the air pressure at the taphole position.
A2: and obtaining pressure compensation data based on the depth of the tapping hole, the included angle between the tapping hole and the horizontal line and the on-way resistance loss value in the tapping hole channel.
Specifically, the pressure compensation data may be calculated based on the on-way resistance loss value and the product of the depth of the taphole and the sine value of the included angle.
For example, the pressure compensation data can be obtained using the following equation (1):
ΔP＝ρg(H f -L*sinA) (1)
in equation (1), Δ P is pressure compensation data; rho is the comprehensive density of the molten iron in the tapping hole channel; g is the acceleration of gravity; h f The on-way resistance loss value in the tapping hole channel is obtained; l is the depth of the taphole; a is an included angle between the taphole and a horizontal line.
Specifically, the on-way resistance loss value in the iron channel can be obtained by obtaining and based on the depth of the iron outlet, the diameter of the iron channel, the on-way resistance coefficient of the iron channel and the actual flow rate of the molten iron in the iron channel.
In the specific implementation process, the on-way resistance loss value can be obtained based on the on-way resistance coefficient of the tapping hole channel, the product of the depth of the tapping hole and the square of the actual flow velocity of the molten iron in the tapping hole channel, the gravity acceleration and the diameter of the tapping hole channel.
For example, the on-way resistance loss value can be obtained by using the following formula (2):
in the formula (2), H f Is the on-way resistance loss value; lambda is the on-way resistance coefficient of the tapping hole channel; g is the acceleration of gravity; l is the depth of the taphole; v is outActual flow rate of molten iron in the iron bore; d is the diameter of the tapping hole.
The on-way resistance coefficient of the tapping hole channel can be obtained by obtaining and based on the absolute roughness of the tapping hole channel, the diameter of the tapping hole channel and the Reynolds number of the iron slag in the tapping hole channel.
For example, the on-way resistance coefficient of the cast hole channel can be obtained based on the following formula (3) and according to the Modi chart query:
in the formula (3), lambda is the on-way resistance coefficient of the tapping hole channel; delta is the absolute roughness of the tapping channel; d is the diameter of the tapping hole; re is the Reynolds number of the iron slag in the iron tapping hole channel.
The Reynolds number of the iron slag in the tapping hole channel can be obtained by obtaining and based on the diameter of the tapping hole channel, and the comprehensive density, flow velocity and dynamic viscosity of the molten iron in the tapping hole channel.
By way of example, the Reynolds number of the iron slag in the tapping channel can be found on the basis of the following equation (4):
in the formula (4), re is the Reynolds number of the iron slag in the iron tapping hole channel; d is the diameter of the tapping hole; rho is the comprehensive density of the molten iron in the tapping hole channel; v is the flow velocity of molten iron in the tapping hole channel; mu is the dynamic viscosity of the molten iron in the tapping hole channel.
The comprehensive density of the molten iron in the tapping hole channel can be obtained based on the conventional density of the molten iron in the tapping hole channel, the ratio of the iron slag in the tapping hole channel and the conventional density of the iron slag in the tapping hole channel.
For example, the integrated density of the molten iron in the tapping hole can be obtained based on the following formula (5):
in the formula (5), rho is the comprehensive density of the molten iron in the tapping hole channel; ρ is a unit of a gradient Iron The conventional density of the molten iron in the tapping hole channel; ρ is a unit of a gradient Slag The conventional density of the iron slag in the tapping hole channel; gamma is the iron slag ratio in the iron tapping hole channel.
A3: first pressure data is determined based on the second pressure data and the pressure compensation data.
Specifically, after obtaining the pressure compensation data, the first pressure data may be obtained based on a sum of the pressure compensation data and the second pressure data.
For example, the first pressure data may be calculated using the following equation (6):
P i ＝P 0 +ΔP (6)
in the formula (6), P i Is first pressure data; p 0 Second pressure data; Δ P is the pressure compensation data.
It should be noted that, the steps A1 and A2 may be executed simultaneously, or the step A1 may be executed first, and then the step A2 is executed, or the step A2 may be executed first, and then the step A1 is executed, which is not limited herein, as long as the second pressure data and the pressure compensation data are obtained before the step A3 is executed.
Step S102: and determining an evaluation index value for representing the reason of molten iron splashing at the taphole based on the first pressure data and the hot air pressure data.
Specifically, the evaluation index value may be obtained based on a ratio of the first pressure data to the hot air pressure data.
For example, the evaluation index value may be obtained by using the following formula (7):
in formula (7), K is an evaluation index value; p i Is first pressure data; p w The hot air pressure data.
Step S103: and determining a target reference index range in which the evaluation index value is positioned from a plurality of preset reference index ranges.
A plurality of reference index ranges can be established in advance according to actual production experience, corresponding splashing reasons are set for each reference index range, and intersection does not exist in the values of each reference index range.
For example, the cause of the splashing may be caused by the gas leakage of the furnace wall or the inactivity of the furnace hearth, and the cause of the splashing may be set according to the actual range of each reference index range.
Step S104: and determining the splashing reason corresponding to the target reference index range as the actual reason of the current molten iron splashed from the blast furnace taphole.
Specifically, the plurality of reference index ranges may include: a first reference index range, and a second reference index range having a lower limit value greater than an upper limit value of the first reference index range.
Of course, a third reference index range whose lower limit value is greater than the upper limit value of the second reference index range may be included, and the number of the reference index ranges is not particularly limited.
Correspondingly, if the splashing reason corresponding to the first reference index range is the furnace wall gas leakage and the evaluation index value is in the first reference index range, the actual reason that the molten iron is splashed at the current iron outlet of the blast furnace is determined to be the furnace wall gas leakage.
And if the splashing reason corresponding to the second reference index range is that the furnace hearth is not active and the evaluation index value is in the second reference index range, determining that the actual reason that the blast furnace taphole splashes molten iron currently is that the furnace hearth is not active.
After the actual reason is determined to be the furnace wall gas leakage, the blast furnace can be subjected to grouting treatment to repair the position of the furnace wall gas leakage.
After the actual reason is determined to be that the hearth is not active, the coke quality of the blast furnace can be optimized, or the coke load of the blast furnace can be reduced, so that the hearth activity of the blast furnace can be improved.
To facilitate understanding of the above technical solutions, the following examples are given in a 4000-cube blast furnace:
two reference index ranges can be preset, wherein one reference index range can be set to be (0,1), and the corresponding splashing reason can be set to be the cross gas of the furnace wall; another reference index range may be set to (1, + ∞), and the corresponding cause of splashing may be set to hearth inactivity.
The obtained relevant parameters of the blast furnace are as follows: hot air pressure data P w At 400kPa; second pressure data P of taphole position 0 Is 100kPa; the depth L of the taphole is 3.8m; the included angle A between the tapping hole and the horizontal line is 12 degrees; the diameter D of the tapping hole channel is 60mm; the actual flow velocity V of the molten iron in the tapping hole channel is 9.95m/s; the iron slag ratio gamma in the tapping hole channel is 300kg/tHM; the dynamic viscosity mu of the molten iron in the tapping hole channel is 6.1351 multiplied by 10 -3 (ii) a The absolute roughness delta of the tapping hole channel is 0.1mm; conventional density rho of molten iron in tapping channel Iron (II) Is 7t/m 3 (ii) a Conventional density rho of iron slag in iron tapping hole channel Slag Is 3t/m 3 。
Then, firstly, the comprehensive density ρ of the molten iron in the tapping hole channel is calculated by using the formula (5):
then, the reynolds number of the iron slag in the tapping hole channel can be calculated by the formula (4) as follows:
according to the absolute roughness Delta of the tapping hole channel, the diameter D of the tapping hole channel and the Reynolds number Re of the iron slag in the tapping hole channel, the on-way resistance coefficient lambda of the tapping hole channel is obtained by inquiring a Modi diagram and is 0.023.
The on-way resistance loss value in the iron hole channel can be calculated by the formula (2) as follows:
and calculating pressure compensation data according to the formula (1):
ΔP＝6.077×1000×9.8×(7.37-3.8×sin(12°))＝395
finally, according to the above equation (6), the first pressure data P can be calculated i Comprises the following steps:
P i ＝P 0 +ΔP＝395+100＝495
and according to the formula (7), calculating to obtain an evaluation index value K as follows:
since 1.24 ∈ (1, + ∞), the actual reason why the blast furnace taphole is currently splashing molten iron is that the hearth is inactive. After the actual reason is that the hearth is not active, the coke quality of the blast furnace can be optimized, or the coke load of the blast furnace can be reduced, and specifically, the hearth activity of the blast furnace can be improved at least by one or more of the following modes:
the method comprises the steps of firstly, improving the air permeability and liquid permeability of a dead coke pile in a blast furnace hearth;
and the second mode is to improve the physical heat and the chemical heat of the molten iron in the blast furnace hearth.
In a second aspect, the present invention provides a diagnostic apparatus for molten iron splashing from a taphole of a blast furnace, which is applicable to a blast furnace having a taphole tunnel and a tuyere, wherein the taphole tunnel is connected to the taphole of the blast furnace.
Referring to fig. 2, the apparatus may include:
the data acquisition unit 201 is used for acquiring first pressure data in the tapping hole channel and acquiring hot air pressure data of the air port position.
And the evaluation index determining unit 202 is used for determining an evaluation index value for representing the reason of molten iron splashing from the taphole based on the first pressure data and the hot blast pressure data.
The splash reason determining unit 203 is configured to determine a target reference index range in which the evaluation index value is located from a plurality of preset reference index ranges, where each reference index range corresponds to a splash reason; and determining the splashing reason corresponding to the target reference index range as the actual reason of the current molten iron splashed from the blast furnace taphole.
As an optional implementation, the data obtaining unit 201 includes:
and the data acquisition subunit is used for acquiring second pressure data of the taphole position.
And the first data calculation subunit is used for acquiring and obtaining pressure compensation data based on the depth of the tapping hole, the included angle between the tapping hole and the horizontal line and the on-way resistance loss value in the tapping hole channel.
And the second data calculation subunit is used for determining the first pressure data based on the second pressure data and the pressure compensation data.
As an optional implementation manner, the first data calculation subunit is specifically configured to:
and obtaining an on-way resistance loss value in the tapping hole channel based on the depth of the tapping hole, the diameter of the tapping hole channel, the on-way resistance coefficient of the tapping hole channel and the actual flow rate of the molten iron in the tapping hole channel.
And obtaining the on-way resistance coefficient of the tapping hole channel based on the absolute roughness of the tapping hole channel, the diameter of the tapping hole channel and the Reynolds number of the iron slag in the tapping hole channel.
And obtaining the Reynolds number of the iron slag in the tapping hole channel based on the diameter of the tapping hole channel and the comprehensive density, flow rate and dynamic viscosity of the molten iron in the tapping hole channel.
And obtaining the comprehensive density of the molten iron in the tapping hole channel based on the conventional density of the molten iron in the tapping hole channel, the ratio of the iron slag in the tapping hole channel and the conventional density of the iron slag in the tapping hole channel.
As an optional implementation manner, the evaluation index determining unit 202 is specifically configured to:
and obtaining an evaluation index value based on the ratio of the first pressure data to the hot air pressure data.
It should be noted that the plurality of reference index ranges include a first reference index range and a second reference index range having a lower limit value larger than an upper limit value of the first reference index range. The sputtering cause determining unit 203 is specifically configured to:
if the evaluation index value is within the first reference index range, determining that the actual reason is the gas leakage of the furnace wall; and if the evaluation index value is within the second reference index range, determining that the actual reason is that the furnace hearth is not active.
As an optional implementation, the apparatus may further include:
the processing opinion generating unit 204 is used for generating a signal for carrying out grouting processing on the blast furnace after determining that the actual reason is furnace wall gas leakage so as to prompt a worker to repair the position of the furnace wall gas leakage; and generating a signal for optimizing the quality of the blast furnace coke or reducing the coke load after determining that the actual reason is that the hearth is not active, so as to inform workers of improving the hearth activity of the blast furnace.
Since the method for diagnosing molten iron splashed from a blast furnace taphole described in this embodiment is a method adopted by the apparatus for diagnosing molten iron splashed from a blast furnace taphole in the embodiment of the present invention, a person skilled in the art can understand the specific implementation manner of the method of this embodiment and various modifications thereof based on the method for diagnosing molten iron splashed from a blast furnace taphole described in the embodiment of the present invention, and therefore, how to implement the method in the embodiment of the present invention will not be described in detail herein. So long as those skilled in the art can practice the method of the apparatus for diagnosing molten iron splashed from a taphole of a blast furnace according to the embodiment of the present invention, they are within the intended scope of the present invention.
In a third aspect, based on the same inventive concept, embodiments of the present invention provide a computer apparatus, which may be applied to a blast furnace having a tapping hole and a tuyere, wherein the tapping hole is connected to a tapping hole of the blast furnace.
Referring to fig. 3, a computer device provided in an embodiment of the present invention includes: the memory 301, the processor 302 and the code stored in the memory and executable on the processor 302, the processor 302 implementing any one of the above-mentioned methods for diagnosing molten iron splashed from a taphole of a blast furnace when executing the code.
Where in fig. 3 a bus architecture (represented by bus 300), bus 300 may include any number of interconnected buses and bridges, bus 300 linking together various circuits including one or more processors, represented by processor 302, and memory, represented by memory 301. The bus 300 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 305 provides an interface between the bus 300 and the receiver 303 and transmitter 304. The receiver 303 and the transmitter 304 may be the same element, i.e. a transceiver, providing a unit for communicating with various other apparatus over a transmission medium. The processor 302 is responsible for managing the bus 300 and general processing, while the memory 301 may be used for storing data used by the processor 302 in performing operations.
The technical scheme in the embodiment of the invention at least has the following technical effects or advantages:
the method comprises the steps of obtaining first pressure data in a tapping hole channel, obtaining hot air pressure data of an air port position, and determining an evaluation index value for representing the reason of molten iron splashing at a tapping hole based on the first pressure data and the hot air pressure data. And then, determining a target reference index range in which the evaluation index value is located from a plurality of preset reference index ranges, wherein each reference index range corresponds to a splashing reason, so that the splashing reason corresponding to the target reference index range can be determined as the actual reason of the current splashed molten iron at the taphole of the blast furnace.
Compared with the existing method for judging the reason of splashing only by depending on experience, the method and the device provided by the embodiment of the invention judge the reason of splashing molten iron at the taphole by depending on the pressure in the taphole of the blast furnace and the pressure at the tuyere of the blast furnace, so that the reason of splashing molten iron at the taphole is more accurate.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer instructions. These computer instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A diagnostic method for molten iron splashing from a blast furnace taphole is characterized in that the blast furnace is provided with a tapping hole channel and a tuyere, the tapping hole channel is connected with the taphole of the blast furnace, and the method comprises the following steps:
acquiring first pressure data in the tapping hole channel and acquiring hot air pressure data of the air port position; wherein said obtaining first pressure data within said tapping hole includes: acquiring second pressure data of the position of the taphole; acquiring and obtaining pressure compensation data based on the depth of the taphole, the included angle between the taphole and a horizontal line and the on-way resistance loss value in the tapping hole channel; determining the first pressure data based on the second pressure data and the pressure compensation data;
determining an evaluation index value for characterizing the reason for the molten iron splashing from the taphole based on the first pressure data and the hot blast pressure data, comprising: obtaining the evaluation index value based on the ratio of the first pressure data to the hot air pressure data;
determining a target reference index range in which the evaluation index value is located from a plurality of preset reference index ranges, wherein each reference index range corresponds to a splash reason;
determining the splashing reason corresponding to the target reference index range as the actual reason of the molten iron splashed at the current taphole of the blast furnace, wherein the reference index ranges comprise a first reference index range and a second reference index range of which the lower limit value is greater than the upper limit value of the first reference index range;
the determining the splashing reason corresponding to the target reference index range as the actual reason of the molten iron splashed at the current taphole of the blast furnace comprises the following steps: if the evaluation index value is within the first reference index range, determining that the actual reason is the furnace wall gas leakage; and if the evaluation index value is within the second reference index range, determining that the actual reason is that the hearth is inactive.
2. The method of claim 1, wherein said obtaining an on-way drag loss value in said tapping channel comprises:
and obtaining an on-way resistance loss value in the tapping hole channel based on the depth of the tapping hole, the diameter of the tapping hole channel, the on-way resistance coefficient of the tapping hole channel and the actual flow rate of the molten iron in the tapping hole channel.
3. The method of claim 2, wherein said obtaining an on-way drag coefficient for said tapping spout comprises:
and obtaining the on-way resistance coefficient of the tapping hole channel based on the absolute roughness of the tapping hole channel, the diameter of the tapping hole channel and the Reynolds number of the iron slag in the tapping hole channel.
4. The method of claim 3, wherein said obtaining the Reynolds number of the iron slag in the runner includes:
and obtaining the Reynolds number of the iron slag in the tapping hole channel based on the diameter of the tapping hole channel and the comprehensive density, flow speed and dynamic viscosity of the molten iron in the tapping hole channel.
5. The method of claim 4, wherein said obtaining the combined density of molten iron in the tap hole includes:
and obtaining the comprehensive density of the molten iron in the tapping hole channel based on the conventional density of the molten iron in the tapping hole channel, the iron-slag ratio in the tapping hole channel and the conventional density of the iron slag in the tapping hole channel.
6. The method of claim 1,
after the actual reason is determined to be the furnace wall gas leakage, the method further comprises the following steps:
carrying out grouting treatment on the blast furnace to repair the position of the furnace wall with gas leakage;
after the determining that the actual cause is hearth inactivity, further comprising:
optimizing coke quality of the blast furnace or reducing coke load of the blast furnace to increase hearth activity of the blast furnace.
7. The diagnostic apparatus for the diagnostic method of molten iron splashing from the taphole of a blast furnace according to claim 1, wherein the blast furnace is provided with a tapping hole and a tuyere, the tapping hole is connected to the taphole of the blast furnace, the apparatus comprises:
the data acquisition unit is used for acquiring first pressure data in the tapping hole channel and acquiring hot air pressure data of the air port position; the data acquisition unit includes:
the data acquisition subunit is used for acquiring second pressure data of the taphole position;
the first data calculation subunit is used for acquiring and obtaining pressure compensation data based on the depth of the taphole, the included angle between the taphole and the horizontal line and the on-way resistance loss value in the tapping hole channel;
a second data calculation subunit configured to determine the first pressure data based on the second pressure data and the pressure compensation data;
an evaluation index determination unit, configured to determine an evaluation index value for characterizing a reason for molten iron splashing at the taphole based on the first pressure data and the hot blast pressure data; the evaluation index determination unit is specifically configured to: obtaining the evaluation index value based on the ratio of the first pressure data to the hot air pressure data;
the splash reason determining unit is used for determining a target reference index range in which the evaluation index value is located from a plurality of preset reference index ranges, and each reference index range corresponds to a splash reason; determining the splashing reason corresponding to the target reference index range as the actual reason of the current molten iron splashed from the blast furnace taphole;
wherein the plurality of reference index ranges include a first reference index range and a second reference index range having a lower limit value greater than an upper limit value of the first reference index range; the splash reason determining unit is specifically configured to: if the evaluation index value is within the first reference index range, determining that the actual reason is the furnace wall gas leakage; and if the evaluation index value is within the second reference index range, determining that the actual reason is that the hearth is inactive.
8. A computer device comprising a memory, a processor, and code stored on the memory and executable on the processor, the processor implementing the method of any of claims 1-6 when executing the code.
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