CN107092239B - Blast furnace iron output estimation device and method - Google Patents
Blast furnace iron output estimation device and method Download PDFInfo
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- CN107092239B CN107092239B CN201610088993.1A CN201610088993A CN107092239B CN 107092239 B CN107092239 B CN 107092239B CN 201610088993 A CN201610088993 A CN 201610088993A CN 107092239 B CN107092239 B CN 107092239B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 324
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 238000010079 rubber tapping Methods 0.000 claims abstract description 40
- 238000004364 calculation method Methods 0.000 claims abstract description 15
- 238000009628 steelmaking Methods 0.000 claims abstract description 11
- 238000012937 correction Methods 0.000 claims abstract description 5
- 238000013480 data collection Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005303 weighing Methods 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000037221 weight management Effects 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41875—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by quality surveillance of production
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32368—Quality control
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Blast Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a blast furnace tapping amount estimation device and a blast furnace tapping amount estimation method. The correlation determination module comprises a liquid level height unit and a determination unit, wherein the liquid level height unit reads the liquid level height of the blast furnace side, the determination unit reads the determination amount of molten iron in each tank of the steelmaking side, and the correlation determination module calculates the corresponding relation between the liquid level height of the molten iron and the determination amount of the molten iron according to the data of the liquid level height unit and the determination unit. The calculation module includes a tapping amount estimation unit and a tapping amount correction unit. And the tapping amount unit reads the actual liquid level height in the iron mixing car, and substitutes the actual liquid level height into the corresponding relation between the molten iron liquid level height and the determined amount of molten iron to obtain the actual determined amount of molten iron in the iron mixing car. The tapping amount correcting unit corrects the correspondence between the molten iron level height and the determined amount of molten iron based on the actual determined amount of molten iron. The invention has important practical significance for improving the yield and quality of products and reducing production faults.
Description
Technical Field
The present invention relates to a blast furnace facility and method, and more particularly, to a blast furnace iron tapping amount estimation device and method.
Background
In the production process of the blast furnace, the blast furnace is used for discontinuous tapping, and the tapping time is about 2 hours each time. The apparatus for receiving molten iron is generally a torpedo type hot metal mixer car. Conventionally, a weigher 12 is provided under the mixer car to determine the data for each tapping, and the tapping for that day can be calculated by adding up the tapping for each time. In the production process of the blast furnace, molten iron is produced all the time, but the tapping can only be interrupted, the molten iron produced inside can be calculated according to the iron content in the charged raw materials, and if the iron content in each tapping can be known, the iron storage amount in the furnace can be calculated. Because molten iron is continuously produced, the iron storage amount is continuously increased, and when the iron storage amount is increased to a certain degree, the iron must be discharged in time, otherwise equipment can be burnt out or unsmooth production can be caused. Therefore, the amount of the iron tapping amount must be mastered in time, otherwise, the iron storage amount cannot be calculated.
As shown in fig. 1, in general, a torpedo car weighing gauge 12 is disposed on a torpedo car track below a taphole of a blast furnace, and a molten iron level gauge 11 is disposed above the torpedo car track, and the molten iron level gauge 11 is used for measuring the molten iron level of a mixer car. The operator judges when the taphole is opened to tap iron according to the increasing iron storage amount. However, due to the investment limitation of sites and environment, some blast furnaces are not provided with a torpedo car weighing device, the amount of the iron is judged only according to the molten iron level gauge 11, and then the time for opening the iron notch is judged, and because the torpedo car is corroded and solidified in the molten iron charging process of the torpedo car, the amount of the iron which is estimated by simply measuring the liquid level gauge 11 is very inaccurate, the production operation of the blast furnace is influenced, sometimes serious consequences are caused, and great loss occurs in enterprises.
For example, patent publication No. CN101339429A entitled molten iron weighing operation management and information transfer apparatus. The invention belongs to the technical field of physical departments, discloses a molten iron weighing management and information transmission device, and particularly relates to a vehicle-mounted weighing operation management and information transmission device irrelevant to a transport path of a molten iron ladle car. The invention is composed of a special molten iron weighing information management server, a standard weighing field operation panel and a molten iron receiving data packet configured for each blast furnace, data transmission among the field operation panels does not need network physical transmission media, and the data transmission among the blast furnaces, a steel making area and a cast iron machine room is carried out by taking a unique identification card carried by a molten iron car transport driver as a carrier. The invention not only meets the requirement of the process flow of one-pot-to-bottom of the molten iron, but also is suitable for the communication of complex logistics transmission and distribution information of common steel plants, especially large-scale steel plants. The invention is mainly used for transmitting the weighing data of the iron mixing vehicle between the iron and steel works, and the technical basis is also based on the weighing data, so that on-site weighing equipment is also indispensable.
Disclosure of Invention
The invention aims to provide a blast furnace tapping amount estimation device and method, aiming at the problem that weighing equipment is required for molten iron weight management in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a blast furnace tapping amount estimation device comprises a correlation determination module and a calculation module. The correlation determination module comprises a liquid level height unit and a determination unit, wherein the liquid level height unit reads the liquid level height of the blast furnace side, the determination unit reads the determination amount of molten iron in each tank of the steelmaking side, and the correlation determination module calculates the corresponding relation between the liquid level height of the molten iron and the determination amount of the molten iron according to the data of the liquid level height unit and the determination unit. The calculation module includes a tapping amount estimation unit and a tapping amount correction unit. And the tapping amount unit reads the actual liquid level height in the iron mixing car, and substitutes the actual liquid level height into the corresponding relation between the molten iron liquid level height and the determined amount of molten iron to obtain the actual determined amount of molten iron in the iron mixing car. The tapping amount correcting unit corrects the correspondence between the molten iron level height and the determined amount of molten iron based on the actual determined amount of molten iron.
According to an embodiment of the invention, the system further comprises a data collection module, wherein the data collection module reads the molten iron liquid level information and the number information of the iron mixing car from the automatic control system on the blast furnace side, collects the determined quantity of molten iron from the automatic control system on the steelmaking side, reads the actual liquid level height from the basic automatic system, and sends all data to the correlation determination module and the calculation module.
According to an embodiment of the present invention, the corresponding relationship between the molten iron level and the determined amount of molten iron is:
wherein y is the determined quantity of molten iron, x is the liquid level height, α1,β1,γ1,
Are coefficients.
In order to achieve the purpose, the invention also adopts the following technical scheme:
a blast furnace tapping amount estimation method comprises the following steps: step 1, collecting molten iron liquid level height and molten iron determining amount information; step 2, calculating the corresponding relation between the liquid level height of the molten iron and the determined amount of the molten iron; step 3, reading the actual liquid level height, substituting the actual liquid level height into the corresponding relation, and calculating the actual molten iron determination amount; and 4, correcting the corresponding relation between the molten iron liquid level height and the determined molten iron amount according to the actual molten iron determined amount obtained through calculation.
According to an embodiment of the present invention, the molten iron level is read from the blast furnace side automatic control system, the molten iron determination amount information is collected from the steelmaking side automatic control system, and the actual level is read from the basic automatic system.
According to an embodiment of the present invention, the corresponding relationship between the molten iron level and the determined amount of molten iron is:
wherein y is the determined quantity of molten iron, x is the liquid level height, α1,β1,γ1,
Are coefficients.
In the above technical solution, the blast furnace tapping amount estimation device and method of the present invention simulate the charging amount of molten iron in a mixer car, i.e. the single blast furnace tapping amount, without the weighing device of the blast furnace mixer car. Therefore, the method is beneficial to reducing the construction cost of the steel plant, can effectively deduce the iron amount at the same time, and has important practical significance for maintaining the overall level of the operation of the blast furnace, stabilizing the furnace condition of the blast furnace, improving the yield and quality of products and reducing production faults.
Drawings
Fig. 1 is a schematic view of a conventional molten iron vehicle apparatus;
FIG. 2 is a schematic structural view of a blast furnace tapping amount estimating apparatus according to the present invention;
FIG. 3 is a graph of molten iron weight versus level;
FIG. 4 is a flowchart of a blast furnace tapping amount estimation method according to the present invention;
fig. 5A and 5B are schematic diagrams of deviation distribution of molten iron before and after the practice of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
The invention provides a method for simulating and measuring the iron output under the condition of no weighing meter, which automatically calculates the iron loading capacity, namely the iron output capacity, of a mixer according to the measurement data of a liquid level meter and the iron output capacity returned by a steel plant under the condition of not arranging the mixer on site, thereby effectively guiding an operator to output iron and improving the accuracy and the stability of the blast furnace operation control. Since the iron output of the mixer car, i.e. the weight of the molten iron or the determined quantity of the molten iron, is directly linked with the height of the liquid level of the mixer car, the link is the key point of the technical scheme of the invention.
Referring to fig. 2, the present invention first discloses a blast furnace iron tapping amount estimation device, wherein a set of control server is arranged in a blast furnace process control room, a display terminal is arranged in a central control room, and the server mainly comprises a data collection module 21, a correlation determination module 22, a calculation module 23, etc. for carrying out iron tapping amount inference calculation. The system reads the past molten iron determination amount and the liquid level of the mixer car in the existing automatic system through a network. The corresponding iron output is obtained through theoretical calculation and logical reasoning and automatically set to the original automatic system.
As shown in fig. 2, the data collection module 21 reads the molten iron level information and the mixer car number information from the blast furnace automatic control system, and writes the information into the database. The determined amount of molten iron is collected from the steel-making side automatic control system, the actual liquid level height is read from the basic automatic system, and all data is sent to the correlation determination module 22 and the calculation module 23.
Referring to fig. 3, there is a correlation between the molten iron level and the determined amount of molten iron, which can be obtained through simulation. Therefore, the correlation determination module 22 includes a liquid level height unit 24 and a determination amount unit 25, the liquid level height unit 24 reads the liquid level height of the blast furnace side, the determination amount unit 25 reads the determined amount of molten iron per ladle on the steel making side, and the correlation determination module 22 calculates the correspondence between the liquid level height of molten iron and the determined amount of molten iron based on the data of the liquid level height unit 24 and the determination amount unit 25. Each iron mixing vehicle has fixed serial numbers, the liquid level height can be measured according to a liquid level meter at the blast furnace side, and specific fixed quantity can be weighed out by each molten iron tank at the steelmaking side. As shown in fig. 3, fitting these two data can obtain a fitted curve of the two data, and accordingly, the relationship between the two data is determined, that is:
Wherein y is the determined quantity of molten iron, x is the liquid level height, α1,β1,γ1,
Are coefficients.
The calculation module 23 includes a tapping amount estimation unit 27 and a tapping amount correction unit 26. When a furnace of molten iron is discharged, the computer automatically reads the corresponding liquid level height from the foundation, and simultaneously reads the number of the mixer car, and substitutes the liquid level height into the corresponding formula (1) of the corresponding mixer car, so that the molten iron weight of the corresponding mixer car is calculated, namely the molten iron weight which can be determined only by a weighing meter originally is obtained. Therefore, the iron amount estimating unit 27 reads the actual liquid level height inside the hot metal mixer car, and obtains the actual determined amount of molten iron inside the hot metal mixer car by substituting the actual liquid level height into the correspondence between the molten iron level height and the determined amount of molten iron.
In addition, since molten iron erosion or solidification occurs continuously inside the mixer car, the correlation between the liquid level height and the weight of molten iron is not constant even though the same mixer car is used. The relation curves of the two parts need to be continuously corrected, and the specific method is to refit according to the latest molten iron determination amount in steelmaking to obtain a new fitting formula (2):
Wherein y is the determined quantity of molten iron, x is the liquid level height, α2,β2,γ2,
Are coefficients.
Therefore, the tapping amount correcting unit 26 corrects the correspondence between the molten iron level height and the determined amount of molten iron based on the actual determined amount of molten iron. After the next new molten iron liquid level height is measured, the system calculates the molten iron weight of the corresponding mixer car according to the relationship between the new molten iron amount and the molten iron liquid level (namely formula 2) determined by self learning.
Besides the main devices, the calculating module 23 is also connected with an electric bell 28 and a prompting lamp 29, and when the iron output data is output, the calculating module 23 simultaneously triggers the electric bell 28 and the prompting lamp 29, so that the function of sound and light warning is achieved.
On the other hand, referring to fig. 4, the present invention also discloses a blast furnace tapping amount estimation method, which mainly comprises the following steps corresponding to the device of the present invention:
s1: collecting the height of the liquid level of molten iron and the determined amount information of the molten iron;
s2: calculating the corresponding relation between the liquid level height of the molten iron and the determined quantity of the molten iron;
s3: reading the actual liquid level height, substituting the actual liquid level height into the corresponding relation, and calculating the actual molten iron determination amount;
s4: and developing a self-learning correction corresponding relation coefficient, namely correcting the corresponding relation between the molten iron liquid level height and the molten iron determined quantity according to the actual molten iron determined quantity obtained by calculation.
S5: waiting for the next signal to be received.
Compared with the prior art, the method has the main characteristics of elimination of individual difference and strong real-time property. Referring to fig. 5A and 5B, the SI content stability of the molten iron after applying the present invention is significantly improved, not more than 0.8%, as shown in fig. 5B. The control is mainly controlled within 1% before, as shown in fig. 5A, which shows that the stability of the molten iron SI is improved, and further shows that the stability of the blast furnace production operation is improved. Therefore, the iron output of the blast furnace can be known in time, so that certain effect on improving the stability is achieved.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (4)
1. A blast furnace tapping amount estimation device is characterized by comprising:
a correlation determination module and a calculation module;
the correlation determination module comprises a liquid level height unit and a determination unit, wherein the liquid level height unit reads the liquid level height of the blast furnace side, the determination unit reads the determination amount of each molten iron tank at the steelmaking side, and the correlation determination module calculates the corresponding relation between the liquid level height of the molten iron and the determination amount of the molten iron according to the data of the liquid level height unit and the determination unit;
the calculation module comprises a tapping amount estimation unit and a tapping amount correction unit;
the tapping amount estimation unit reads the actual liquid level height in the iron mixing car, and substitutes the actual liquid level height into the corresponding relation between the molten iron liquid level height and the determined amount of molten iron to obtain the actual determined amount of molten iron in the iron mixing car;
the tapping amount correcting unit corrects the corresponding relation between the molten iron liquid level height and the determined amount of molten iron according to the actual determined amount of molten iron,
wherein, the corresponding relation between the liquid level height of the molten iron and the determined quantity of the molten iron is as follows:
wherein y is the determined quantity of molten iron, x is the liquid level height, α1,β1,γ1,
Are coefficients.
2. The blast furnace tapping amount estimation apparatus of claim 1, further comprising a data collection module which reads molten iron level information and mixer car number information from the blast furnace side automatic control system, collects a determined amount of molten iron from the steelmaking side automatic control system, reads an actual liquid level height from the basic automation system, and transmits all the data to the correlation determination module and the calculation module.
3. A blast furnace tapping amount estimation method is characterized by comprising the following steps:
step 1, collecting molten iron liquid level height and molten iron determining amount information;
step 2, calculating the corresponding relation between the liquid level height of the molten iron and the determined amount of the molten iron;
step 3, reading the actual liquid level height, substituting the actual liquid level height into the corresponding relation, and calculating the actual molten iron determining amount;
step 4, correcting the corresponding relation between the molten iron liquid level height and the determined molten iron amount according to the actual molten iron determined amount obtained by calculation,
wherein, the corresponding relation between the liquid level height of the molten iron and the determined quantity of the molten iron is as follows:
wherein y is the determined quantity of molten iron, x is the liquid level height, α1,β1,γ1,
Are coefficients.
4. The method of estimating the tapping amount of a blast furnace as set forth in claim 3, wherein the molten iron level is read from a blast furnace-side automatic control system, the molten iron determination amount information is collected from a steel-making-side automatic control system, and the actual level is read from a basic automatic system.
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