CN106521059B - Blast furnace charge level ore coke ratio is measured with phased-array radar to control the method for blast furnace air flow method - Google Patents
Blast furnace charge level ore coke ratio is measured with phased-array radar to control the method for blast furnace air flow method Download PDFInfo
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- CN106521059B CN106521059B CN201610845678.9A CN201610845678A CN106521059B CN 106521059 B CN106521059 B CN 106521059B CN 201610845678 A CN201610845678 A CN 201610845678A CN 106521059 B CN106521059 B CN 106521059B
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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
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- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
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Abstract
The invention discloses a kind of the method for blast furnace air flow method is controlled with phased-array radar measurement blast furnace charge level ore coke ratio, the target O/C under the different working of a furnaces is determined first than distribution curve and establishes air-flow adjustment case library, then selects air-flow adjustment case library and determining Dispensing principle.Under the premise of considering that furnace charge decline, the influence of bottom shape of charge level and furnace charge slump influence, the O/C for directly calculating roof material distributing compares distribution situation, by comparing the correspondence between cloth and air flow method, furnace roof air flow method is controlled by targetedly cloth, it is adjusted so as to fulfill accurately air-flow, empirical blast furnace roof gas flow optimized is promoted into the level to quantization, realizes the stable smooth operation of blast furnace.
Description
Technical field
The invention belongs to blast furnace operation technology fields, particularly relate to a kind of phased-array radar measurement blast furnace charge level ore coke ratio
To control the method for blast furnace air flow method.
Background technology
Blast furnace, to flow reactor, will disappear daily as a multivariable, large time delay, nonlinear super-huge molten iron production
The extremely huge substance of consumption, energy, with a 5000m3Large-scale modernized blast furnace for, daily will produce 12000 tons or so
The pig iron, 20000 tons or so of ore of consumption, the fuel of 6000 tons or so of burning generates 4000 tons or so of clinker, generates
25000 tons or so of CO2, huge material stream, energy stream will all be completed in 24 hours in blast furnace, so huge in blast furnace
Big substance, energy, information exchange are completed in a manual manner all the time.It there is no and come with computer in the world at present
Realize the precedent of blast furnace process control.
Blast furnace burden is packed into from top, and lower part blasts 1200 DEG C or so of hot wind from air port, hot wind by the coke of tuyere area,
Coal dust firing, while 2300 DEG C or so of coal gas of high temperature is generated, coal gas is mainly by CO, N2Composition, can be in blast furnace after fuel combustion
Tuyere area forms space, and furnace charge above gradually falls, and reducing gas below is gradually increasing, and passes through this one side of two-phase flow
Furnace charge is heated in face, and the reduction of furnace charge is on the other hand realized using reducing gas.So, the distribution of upper blast furnace furnace charge and wind
For the distribution situation of mouth region air-flow just into key factor whether determining blast furnace process smoothly, the purpose of cloth mainly controls height
Stove upper air is distributed, that is to say, that rationally the distribution situation of the control two strands of air-flows in blast furnace top and the bottom is into maintaining the smooth smelting of blast furnace
The central factor of refining.Due to blast furnace once into smelting state, bottom house cannot do in process of production it is physically changed, also
It is that cannot adjust incoming air area, air ports size, so the adjustment of air-flow is mainly by top cloth by controlling dividing for upper air
Cloth is completed.
The core of blast furnace operating is exactly to control blast furnace by adjusting the air blast parameter of bottom house and the cloth on top
Stable smooth operation, but blast furnace is an oversized high-temperature closed chemical reactor, and the distribution situation of furnace roof furnace charge can not be direct
It measures, in order to obtain the burden distribution of blast furnace roof and then be precisely controlled air flow method, blast furnace worker for many years
A large amount of fruitful work has been carried out, has been made some progress.
" Diao Sheng, Wang Ge, Liu Chuansheng wait application [J] of stove item infrared photography monitoring systems on blast furnace to document
Steel vanadium titanium, 2002,23 (3)：The side assessed using furnace roof infrared image burden distribution situation is discussed in 54-58. "
Method, this technology is by directly measuring the temperature change of furnace roof charge level during cloth come indirect assessment cloth and air flow method shape
Condition, due to furnace charge surface temperature dependent on gas stream in the stove distribution, blanking velocity, loading kind, charge weight, lower floor shape of charge level
Etc. factors, so difference is also bigger sometimes for the Temperature Distribution measured of the shape of charge level that same burden distribution matrix is formed, depend merely on
Observation top temperature distribution directly assesses air flow method error larger.
Document " Chen Lingkun, Wang Zhigang, Zhao Si, Yu Zhongjie, the research of the gas fluid in blast furnace assessment system based on image procossing
With application, metallurgical industry publishing house, 2007-2007 China Steels annual meeting (CD) " on the basis of furnace roof infrared survey
A kind of method handled using image pattern recognition observed image is proposed, this method passes through mode identification technology
It can identify standard picture when peripheral condition is stablized relatively, it, can by the matching of image by these image construction case libraries
To count the frequency that various images occur in certain time, and then the variation of blast furnace air-flow is assessed, this method substantially improves
The utilization ratio of furnace roof infrared image, burden condition variation less, operation policy there is no great variety when this method be can
It is capable, once but blast furnace materials structure there is the variation that big variation may result in standard cases, not in time will once handling
Lower Evaluated effect, simultaneously because gas stream in the stove is mingled with a large amount of dust when rising, measuring signal distortion is larger, and measures
Signal sampling mouth easily accumulates dust, influences signal quality, is also a kind of indirect measurement method in this way, and error is also same
Sample is unstable.
Document " Chen Lingkun, the exploitation of coal gas flow control technology and its application on No.5 blast furnace of Wuhan Iron ＆ Steel Group Company, ironmaking, 2011
Year, Vol.30.No.5, " in propose and directly judge stock gas flow point using the temperature measuring data of 4 tedges of furnace roof
Cloth and its variation, this method are to be classified by mode identification technology to 4 tedge temperature curves of furnace roof first, secondly
It is that air flow method of halting is evaluated by pattern match, for this method there are 2 defects, one is same top temperature curve
Two kinds of air flow methods may be corresponded to, that is to say, that standard cases library is dependent on cloth, raw material and fuel quality, the phase of operating condition of blast furnace
To stabilization, once the big ups and downs for the external conditions such as crude fuel occur will cause the variation of case library, this knows matching is reduced
Other precision reduces the probability for accurately identifying state of arts.
" east is favored in application of Jiang Huiyan, Xu Guiqing, Zhou Jianchang the .BP algorithms in the identification of gas fluid in blast furnace distribution pattern to document
Northern college journal：Natural science edition, 2000,21 (2)：144-146." provide in [4] and commented using furnace roof cross temperature measurer
The method of valency furnace roof air flow method, cross temperature is equally by cloth, bottom shape of charge level, furnace charge type, cloth batch weight, cloth section
The influence for waiting various factors is played, the Temperature Distribution for measuring acquisition is not the Temperature Distribution of furnace roof charge level, only measuring rod
Temperature Distribution, since measuring rod is for scaling loss generally all band coolings, so measurement result can not reflect furnace roof charge level temperature
Real conditions, measurement result refer to when being adjusted only for cloth and air-flow.
Nippon iron company once provided a kind of mechanical material surface stock rod of utilization and directly measured in the eighties in last century
The technology of burden distribution, the technology can accurately measure shape of charge level, but huge there are equipment, and time-consuming for measurement, Ordnance Protection
Difference, it is fragile the shortcomings of, it is difficult to long-time stable be used for material surface measurement, this seriously inhibits the popularizations and use of the equipment.
Document " Yaowei YU*and HenrikEffect of DEM Parameters on the
Simulated Inter-particle Percolation of Pellets into Coke during Burden
Descent in the Blast Furnace, ISIJ International, Vol.52 (2012), No.5, pp.788-
796." method that cloth mathematical model is built with particle flow theory is provided, this method can calculate the shape of charge level after cloth,
But since the true rolling process of furnace charge particle is difficult to simulate, this method is a kind of exemplary model construction method, is made
It is possible for scientific research, so use is little in practice.
The main means of upper blast furnace control air-flow are adjustment clothes, and since cloth doses of blast furnace is big, furnace charge is in stove
Distributed process declined by furnace charge, the rising of bottom shape of charge level, air-flow, heat transfer, furnace charge roll and slide etc. a variety of factors
Influence, cloth forming process is relative complex, and different cloth patterns can obtain same shape of charge level, in view of at present lack
The direct detection device of charge level, it is difficult to obtain the details of burden distribution, very big difficulty just be caused to exact distributing, at present
The experience stage is remained in adjust air flow method by cloth, is especially fine-tuned even more so.
Invention content
Realize that accurate air-flow adjusted measures blast furnace charge level ore deposit with phased-array radar the object of the present invention is to provide a kind of
Coke ratio controls the method for blast furnace air flow method.
To achieve the above object, it is provided by the present invention to measure blast furnace charge level ore coke ratio with phased-array radar to control blast furnace
The method of air flow method, includes the following steps：
1) the target O/C under the different working of a furnaces is determined than distribution curve and establishes air-flow adjustment case library
1.1) blast furnace phased-array radar cloth Test database is established：Every batch of cloth is sampled using phased-array radar
And the cloth detection data of each measurement point is recorded, it is then stored in cloth Test database；
1.2) O/C of the cloth detection data calculating every batch of cloth in cloth Test database compares distribution surface；
1.3) O/C for calculating any direction compares distribution curve：Each O/C takes the ore coke ratio point in a direction than distribution surface
Cloth obtains an O/C than distribution curve, and obtained all O/C are then stored in discrete data library than distribution curve after discrete
In；
1.4) O/C is established than distribution curve case library：Using preset time segment data as case space, repetition step 1.1)~
1.3) O/C is established than distribution curve case library；
1.5) standard O/C is established than distribution curve case library：Pattern-recognition is carried out using k-means algorithms, to step
1.4) a variety of different O/C classify than distribution curve in, obtain M class distribution patterns, and M classes distribution pattern forms standard O/C
Than distribution curve case library；
1.6) determine that the target O/C under the different working of a furnaces compares distribution curve in standard O/C is than distribution curve case library；
1.7) blast furnace air flow method detection data is established：The factor for influencing blast furnace air flow method is sampled and will be sampled
Detection data preserved；
1.8) air flow method database is established according to blast furnace air flow method detection data in step 1.7)；
1.9) by target O/C corresponding under the different working of a furnaces than being carried out on the basis of distribution curve to gas flow optimized pattern and range
Classification：The standard of the working of a furnace includes four kinds, and such as furnace temperature fluctuation, type of furnace fluctuation, hearth accumulation, gas permeability, direct motion deteriorate；
1.10) it builds and the air-flow adjustment case library of O/C ratios control air-flow is utilized under the different working of a furnaces：
(1) the air-flow adjustment case library of O/C ratios control air-flow is utilized under furnace temperature fluctuation situation；
(2) the air-flow adjustment case library of O/C ratios control air-flow is utilized under type of furnace fluctuation situation；
(3) the air-flow adjustment case library of O/C ratios control air-flow is utilized under hearth accumulation situation；
(4) the air-flow adjustment case library of O/C ratios control air-flow is utilized under gas permeability, direct motion impaired condition；
2) selection air-flow adjustment case library and determining Dispensing principle：
2.1) the blast furnace condition monitor data library for matching air-flow adjustment case library is established：It will be used to describe blast furnace situation
Monitoring data be stored in blast furnace condition monitor data library；
2.2) the air-flow adjustment case library according to needed for the selection of working of a furnace present situation；
2.3) the air-flow Dispensing principle under the different working of a furnaces is determined；
2.4) current-controlled target is reached than distribution by cloth adjustment furnace roof O/C：It is calculated using phased-array radar
Practical O/C carries out Curve Matching in adjusting case library from corresponding air flow, judges that currently practical O/C ratios distribution is bent than distribution curve
Whether line is at one's best, if it is not, then selection target O/C calculates two than distribution curve in air-flow adjusts case library
Kind O/C provides the principle of cloth adjustment, so as to fulfill the control to air flow method than the difference of distribution curve.
Further, the detailed process of the step 1.2) is：According to calculating along under every batch of cloth different-diameter position
Material speed, calculates the location coordinate information fallen behind under each measurement point coke in every batch of cloth and calculating simultaneously currently calculates when institute
The three-dimensional coordinate position information of the ore bed of material of corresponding period, so as to calculate the O/C of every batch of cloth than distribution surface, and by institute
Some O/C are stored in than distribution surface in O/C ratios distribution curved surface data library.
Further, the detailed process of the step 1.6) is：With gas utilization rate, usage factor and smooth operation of furnace index
For standard, standard O/C than the O/C in distribution curve case library than distribution curve is judged, is determined under the different working of a furnaces
Target O/C is than distribution curve, and the different working of a furnaces correspond to different feature furnace parameters.
Further, the factor that air flow method is influenced in the step 1.7) includes material quality and performance, blast furnace cooling
Cloth information, blast furnace air parameter, blanking time, wind pressure variation, furnace roof pressure involved in wall temperature situation, blast furnace material distribution matrix
Involved in power, Static Pressure Distribution In The B. F. Shaft changing value, cupola well and bottom temperature information, information of tapping a blast furnace of slagging tap, wherein blast furnace material distribution matrix
Cloth information includes type, quantity, the setting of cloth stockline depth, cloth order, angle position and the number of rings of feed stock for blast furnace.
Further, the detailed process of the step 1.8) is：By detection data in step 1.7) by building the form of table
It is stored in air flow method database, and a kind of data establish a table.
Further, the detailed process of the step 2.2) is：Characteristic factors according to air flow method is influenced identify special
Furnace parameter is levied, corresponding air-flow adjustment case library is enabled according to feature furnace parameter；And according to " hearth accumulation situation → furnace temperature
The order that fluctuation situation → type of furnace fluctuation situation → gas permeability, direct motion impaired condition " is adjusted is handled successively.
Further, step 2.3) the air-flow Dispensing principle is specially：The air-flow Dispensing principle of furnace temperature fluctuation situation is
It is moved towards by furnace charge load come adjusting furnace temperature；The air-flow Dispensing principle of type of furnace fluctuation situation is by adjusting two strands of edge, center
Air-flow is adjusted；The air-flow Dispensing principle of hearth accumulation situation is to enliven cupola well with the mode for getting through central gas stream；Thoroughly
Gas, direct motion impaired condition air-flow Dispensing principle to be adjusted by adjusting the mode at two strands of edge, center air-flows.
The beneficial effects of the invention are as follows：Considering what furnace charge decline, the influence of bottom shape of charge level and furnace charge slump influenced
Under the premise of, the O/C of roof material distributing is directly calculated than distribution situation, by comparing the correspondence between cloth and air flow method,
Furnace roof air flow method is controlled by targetedly cloth, is adjusted so as to fulfill accurately air-flow, by empirical State of Blast Furnace
Top gas flow control promotes the level to quantization, realizes the stable smooth operation of blast furnace.
Description of the drawings
Fig. 1 is the flow diagram of the present embodiment step 1)；
Fig. 2 is the flow diagram of the present embodiment step 2).
Specific embodiment
Below by specific embodiment, the present invention is described in further detail.
This method is implemented on internal volume 5000m3Blast furnace, which is equipped with two sets of oracle database systems
System, using C++ programming languages, including four sets of PLC systems related with cloth, coal powder injection control, two sets are used for cloth control, a set of
It is a set of to be controlled for breeze blowing for cupola well furnace bottom Detection ＆ Controling, a set of DCS system, for adjusting of air blast parameter etc.,
Establish two Database Systems.
Measuring blast furnace charge level ore coke ratio with phased-array radar, its step are as follows to control the method for blast furnace air flow method：
1) the target O/C under the different working of a furnaces is determined than distribution curve and establishes air-flow adjustment case library, as shown in Figure 1,
1.1) blast furnace phased-array radar cloth Test database is established：
With 5000m3For large blast furnace, in blast furnace top gearbox lower part, phased array is installed in the top trepanning of furnace roof frustum
Radar equipment, as long as ensureing measurement point from cloth vertical range more than 4.5 meters, it is possible to ensure to use device measuring to whole
A cloth.The cloth detection data of each measurement point, Ran Houbao are sampled and recorded to every batch of cloth using phased-array radar
There are in cloth Test database.Phased-array radar sample information and sample frequency such as table 1
Table 1
1.2) O/C of the cloth detection data calculating every batch of cloth in cloth Test database compares distribution surface：One
It criticizes cloth and includes coke and ore, only just carry out calculating of the O/C than distribution surface after the ore cloth of a collection of cloth kind is complete；Root
According to the blanking velocity calculated along every batch of cloth different-diameter position, the position fallen behind under each measurement point coke in every batch of cloth is calculated
The three-dimensional coordinate position information of the ore bed of material of corresponding period, is considering when putting coordinate information and calculating current calculate simultaneously
After 15% or so coke layer slump is corrected, so as to calculate the O/C of every batch of cloth than distribution surface, and by all O/C scores
Cloth curved surface is stored in O/C ratios distribution curved surface data library.
1.3) O/C for calculating any direction compares distribution curve：In view of normal cloth is circumferentially symmetrical, risen to be easy
See, only consider the ore coke ratio distribution in a direction here, O/C is converted into curve to consider than distribution surface, each O/C scores
Cloth curved surface takes the ore coke ratio in a direction to be distributed to obtain an O/C than distribution curve, and every curve includes the data of 30 or so,
Then obtained all O/C are stored in after discrete in discrete data library than distribution curve.
1.4) O/C is established than distribution curve case library：Using one-year age segment data as case space, the distribution of O/C ratios is established
Curve case library.5000m3The daily feed stock for blast furnace batch of blast furnace repeats step 1.1)~1.3 at 160~180 batches or so), daily
160~180 O/C can be obtained than distribution curve case, the case amount of 1 year is at 7~80,000 or so；
1.5) standard O/C is established than distribution curve case library：Pattern-recognition is carried out using k-means algorithms, to step
1.4) a variety of different O/C classify than distribution curve in, obtain 36 class distribution patterns, and 36 class distribution patterns form standard O/
C is than distribution curve case library；
1.6) determine that the target O/C under the different working of a furnaces compares distribution curve in standard O/C is than distribution curve case library：With coal
Gas utilization rate, usage factor and smooth operation of furnace index are standard, and combine air quantity, pressure difference at that time, standard O/C ratios are distributed bent
O/C in line case library is judged than distribution curve, determines the target O/C under the different working of a furnaces than distribution curve, and not
Different feature furnace parameters is corresponded to the working of a furnace.5000m3Blast furnace basis for estimation such as table 2：
Table 2
1.7) blast furnace air flow method detection data is established：The factor for influencing blast furnace air flow method is sampled and will be sampled
Detection data preserved, wherein, influence air flow method factor include material quality and performance, blast furnace cooling stave temperature shape
Cloth information, blast furnace air parameter, blanking time involved in condition, blast furnace material distribution matrix, wind pressure variation, furnace top pressure, shaft
Static pressure changing value, cupola well and bottom temperature information, information of tapping a blast furnace of slagging tap, the cloth information wherein involved in blast furnace material distribution matrix
Type, quantity including feed stock for blast furnace, the setting of cloth stockline depth, cloth order, angle position and number of rings.The number of various detection datas
Amount and sample frequency such as table 3：
Table 3
1.8) air flow method database is established according to blast furnace air flow method detection data in step 1.7)：It will be in step 1.7)
Detection data is stored in by building the form of table in air flow method database, and a kind of data establish a table.Such as table 4；
Table 4
1.9) by target O/C corresponding under the different working of a furnaces than being carried out on the basis of distribution curve to gas flow optimized pattern and range
Classification：The standard of the working of a furnace includes four kinds, and such as furnace temperature fluctuation, type of furnace fluctuation, hearth accumulation, gas permeability, direct motion deteriorate；I.e. following four
Kind：
O/C is than distribution curve+furnace temperature fluctuation；
O/C is than distribution curve+type of furnace fluctuation；
O/C is than distribution curve+hearth accumulation；
O/C deteriorates than distribution curve+gas permeability, direct motion.
The related data of each case is formed into data sample during classification, a kind of state of air flow method is represented, treats sample
Classified automatically to sample database after the completion of arrangement, sub-category institute is the corresponding classification results of each case.
In addition, the different working of a furnaces correspond to different feature furnace parameters such as table 5
Table 5
1.10) it builds and the air-flow adjustment case library of O/C ratios control air-flow is utilized under the different working of a furnaces：
(1) the air-flow adjustment case library of O/C ratios control air-flow is utilized under furnace temperature fluctuation situation；For 5000m3Blast furnace and
Speech, the case library include 16 kinds of cases；
(2) the air-flow adjustment case library of O/C ratios control air-flow is utilized under type of furnace fluctuation situation；For 5000m3Blast furnace and
Speech, the case library include 14 kinds of cases；
(3) the air-flow adjustment case library of O/C ratios control air-flow is utilized under hearth accumulation situation；For 5000m3Blast furnace and
Speech, the case library include 8 kinds of cases；
(4) the air-flow adjustment case library of O/C ratios control air-flow is utilized under gas permeability, direct motion impaired condition；For 5000m3
For blast furnace, which includes 22 kinds of cases.
2) selection air-flow adjustment case library and determining Dispensing principle：As shown in Fig. 2,
2.1) the blast furnace condition monitor data library for matching air-flow adjustment case library is established：
The foundation of the air-flow adjustment case library under the various working of a furnaces is completed in step 1), it is determined that the type of furnace is abnormal, furnace temperature
Air-flow abnormal, when furnace cylinder working situation is abnormal, blast furnace blanking is bad adjusts case library, is contained in these case libraries each specific
The O/C of the working of a furnace is than distribution curve, the characteristic parameter of the specific working of a furnace of characterization.To utilize the different working of a furnace downstream distributions of these adjustments
Case library, it is necessary to find out the trigger data for starting case library, that is, to judge whether the current working of a furnace falls into these special
In the working of a furnace, this judgement is based on blast furnace process detection data, these data describe blast furnace situation, and calculated in advance is needed to go out
Come, and preserve in the database.Such as table 6：
Table 6
2.2) the air-flow adjustment case library according to needed for the selection of working of a furnace present situation：According to the Characteristic factors for influencing air flow method
Identification feature furnace parameter enables corresponding air-flow adjustment case library according to feature furnace parameter；Sometimes four kinds of working of a furnaces are single
Solely occur, be sometimes to concentrate to occur, when concentration occurs since the cloth adjustment under the various working of a furnaces respectively has feature, sometimes even
It will appear the phenomenon that contradictory between each other, just need according to the mutual causality of the working of a furnace, determine excellent in this case
The stove first adjusted,.State recognition here according to influence factor goes out the working of a furnace to be treated, according to " hearth accumulation situation → stove
The order that warm fluctuation situation → type of furnace fluctuation situation → gas permeability, direct motion impaired condition " is adjusted is handled successively.The feature working of a furnace
The materialization of parameter such as table 7, i.e. parameter：
Table 7
2.3) the air-flow Dispensing principle under the different working of a furnaces is determined：Air-flow Dispensing principle is specially：The gas of furnace temperature fluctuation situation
It is to be moved towards by furnace charge load come adjusting furnace temperature to flow Dispensing principle；The air-flow Dispensing principle of type of furnace fluctuation situation is by adjusting side
Edge, two strands of center air-flow are adjusted；The air-flow Dispensing principle of hearth accumulation situation be with the mode for getting through central gas stream come
Enliven cupola well；Gas permeability, direct motion impaired condition air-flow Dispensing principle be by adjusting edge, the two strands of air-flows in center mode into
Row is adjusted.
2.4) current-controlled target is reached than distribution by cloth adjustment furnace roof O/C：It is calculated using phased-array radar
Practical O/C carries out Curve Matching in adjusting case library from corresponding air flow, judges that currently practical O/C ratios distribution is bent than distribution curve
Whether line is at one's best, if it is not, then selection target O/C calculates two than distribution curve in air-flow adjusts case library
Kind O/C provides the principle of cloth adjustment, so as to fulfill the control to air flow method than the difference of distribution curve.
Since O/C than distribution curve is stored in database after discretization, for relatively just turning for two kinds of curves
The comparison of thickness is changed into.Practical O/C is subtracted than distribution curve thickness than distribution curve thickness with target O/C, it is poor by observing
The feature of value determines cloth adjustment direction, generates new burden distribution matrix.Such as fringe region is that positive value then aggravates edge, center
Domain is that positive value then aggravates center.
3) burden distribution matrix for generating step 2.4) passes through the PLC system of dispensing under control flume and control roof material distributing
PLC system realizes the implementation of new burden distribution matrix, reaches conditioning of BF target by constantly matching, adjusting, so as to fulfill stove
Cylinder, the type of furnace, furnace temperature, gas permeability, the target of direct motion adjustment.
Claims (1)
1. a kind of measure blast furnace charge level ore coke ratio to control the method for blast furnace air flow method with phased-array radar, it is characterised in that：
Control method includes the following steps：
1) the target O/C under the different working of a furnaces is determined than distribution curve and establishes air-flow adjustment case library
1.1) blast furnace phased-array radar cloth Test database is established：Every batch of cloth is sampled and remembered using phased-array radar
The cloth detection data of each measurement point is recorded, is then stored in cloth Test database；
1.2) O/C of the cloth detection data calculating every batch of cloth in cloth Test database compares distribution surface；
The detailed process of the step 1.2) is：According to the blanking velocity calculated along every batch of cloth different-diameter position, calculate every
Corresponding period when criticizing the location coordinate information fallen behind under each measurement point coke in cloth and calculating current calculating simultaneously
The three-dimensional coordinate position information of the ore bed of material, so as to calculate the O/C of every batch of cloth than distribution surface, and by all O/C scores
Cloth curved surface is stored in O/C ratios distribution curved surface data library；
1.3) O/C for calculating any direction compares distribution curve：Each O/C takes the ore coke ratio in a direction to be distributed than distribution surface
To an O/C than distribution curve, then obtained all O/C are stored in after discrete in discrete data library than distribution curve；
1.4) O/C is established than distribution curve case library：Using preset time segment data as case space, step 1.1)~1.3 are repeated)
O/C is established than distribution curve case library；
1.5) standard O/C is established than distribution curve case library：Pattern-recognition is carried out using k-means algorithms, in step 1.4)
A variety of different O/C classify than distribution curve, obtain M class distribution patterns, and M classes distribution pattern forms the distribution of standard O/C ratios
Curve case library；
1.6) determine that the target O/C under the different working of a furnaces compares distribution curve in standard O/C is than distribution curve case library；
The detailed process of the step 1.6) is：Using gas utilization rate, usage factor and smooth operation of furnace index as standard, to standard
O/C is judged than the O/C in distribution curve case library than distribution curve, determines the target O/C ratios distribution under the different working of a furnaces
Curve, and the different working of a furnaces correspond to different feature furnace parameters；
1.7) blast furnace air flow method detection data is established：The factor for influencing blast furnace air flow method is sampled and by the inspection of sampling
Measured data is preserved；
The factor that air flow method is influenced in the step 1.7) includes material quality and performance, blast furnace cooling stave temperature regime, height
Cloth information, blast furnace air parameter, blanking time involved in stove burden distribution matrix, wind pressure variation, furnace top pressure, Static Pressure Distribution In The B. F. Shaft
Changing value, cupola well and bottom temperature information, information of tapping a blast furnace of slagging tap, the cloth information wherein involved in blast furnace material distribution matrix include into
Type, quantity, the setting of cloth stockline depth, cloth order, angle position and the number of rings of stove raw material；
1.8) air flow method database is established according to blast furnace air flow method detection data in step 1.7)；
The detailed process of the step 1.8) is：Detection data in step 1.7) is stored in air flow method by building the form of table
In database, and a kind of data establish a table；
1.9) by target O/C corresponding under the different working of a furnaces than dividing on the basis of distribution curve gas flow optimized pattern and range
Class：The standard of the working of a furnace includes four kinds, and furnace temperature fluctuation, type of furnace fluctuation, hearth accumulation, gas permeability, direct motion deteriorate；
1.10) it builds and the air-flow adjustment case library of O/C ratios control air-flow is utilized under the different working of a furnaces：
(1) the air-flow adjustment case library of O/C ratios control air-flow is utilized under furnace temperature fluctuation situation；
(2) the air-flow adjustment case library of O/C ratios control air-flow is utilized under type of furnace fluctuation situation；
(3) the air-flow adjustment case library of O/C ratios control air-flow is utilized under hearth accumulation situation；
(4) the air-flow adjustment case library of O/C ratios control air-flow is utilized under gas permeability, direct motion impaired condition；
2) selection air-flow adjustment case library and determining Dispensing principle：
2.1) the blast furnace condition monitor data library for matching air-flow adjustment case library is established：It will be for describing the prison of blast furnace situation
Measured data is stored in blast furnace condition monitor data library；
2.2) the air-flow adjustment case library according to needed for the selection of working of a furnace present situation；
The detailed process of the step 2.2) is：According to the Characteristic factors identification feature furnace parameter for influencing air flow method, root
Corresponding air-flow adjustment case library is enabled according to feature furnace parameter；And according to " hearth accumulation situation → furnace temperature fluctuation situation → stove
The order that type fluctuation situation → gas permeability, direct motion impaired condition " is adjusted is handled successively；
2.3) the air-flow Dispensing principle under the different working of a furnaces is determined；
Step 2.3) the air-flow Dispensing principle is specially：The air-flow Dispensing principle of furnace temperature fluctuation situation be by furnace charge load come
Adjusting furnace temperature moves towards；The air-flow Dispensing principle of type of furnace fluctuation situation is to be adjusted by adjusting edge, two strands of center air-flow；
The air-flow Dispensing principle of hearth accumulation situation is to enliven cupola well with the mode for getting through central gas stream；Gas permeability, direct motion deteriorate shape
The air-flow Dispensing principle of condition is is adjusted by adjusting the mode at two strands of edge, center air-flows；
2.4) current-controlled target is reached than distribution by cloth adjustment furnace roof O/C：Reality is calculated using phased-array radar
O/C carries out Curve Matching in adjusting case library from corresponding air flow, judges that currently practical O/C is than distribution curve than distribution curve
It is no at one's best, if it is not, then selection target O/C calculates two kinds of O/C than distribution curve in air-flow adjusts case library
Than the difference of distribution curve, the principle of cloth adjustment is provided, so as to fulfill the control to air flow method.
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| CN107641669B (en) * | 2017-09-01 | 2019-07-16 | 武汉钢铁有限公司 | It is a kind of to realize 4000m using scanning radar3The method that blast furnace efficient low-consume is smelted |
| CN107723399B (en) * | 2017-09-21 | 2019-07-19 | 江苏省沙钢钢铁研究院有限公司 | A kind of blast furnace material distribution intelligent monitor system and method for adjustment |
| CN111304388B (en) * | 2020-03-27 | 2021-12-17 | 武汉钢铁有限公司 | Method for optimizing blast furnace gas flow distribution by using scanning radar |
| CN111286570A (en) * | 2020-03-27 | 2020-06-16 | 武汉钢铁有限公司 | Method for regulating and controlling abnormal operation furnace type by using scanning radar |
| CN113065222B (en) * | 2021-02-20 | 2023-03-24 | 武汉钢铁有限公司 | Method and device for evaluating state of hearth |
| CN114875188B (en) * | 2022-05-27 | 2024-04-12 | 本溪北营钢铁（集团）股份有限公司 | Material distribution method for rapidly adjusting blast furnace edge air flow |
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