CN106521059A - Method for controlling blast furnace gas flow distribution by using phased array radar to measure ore coke ratio of blast furnace material surface - Google Patents
Method for controlling blast furnace gas flow distribution by using phased array radar to measure ore coke ratio of blast furnace material surface Download PDFInfo
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- CN106521059A CN106521059A CN201610845678.9A CN201610845678A CN106521059A CN 106521059 A CN106521059 A CN 106521059A CN 201610845678 A CN201610845678 A CN 201610845678A CN 106521059 A CN106521059 A CN 106521059A
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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
- C21B7/24—Test rods or other checking devices
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Abstract
The invention discloses a method for controlling the blast furnace gas flow distribution by using a phased array radar to measure the ore coke ratio of a blast furnace material surface. According to the method, the target O/C ratio distribution curves under different furnace conditions are firstly determined and gas flow adjusting case databases are established, the gas flow adjusting case database is selected and the adjusting principle is determined, the O/C ratio distribution condition of the furnace top material distribution is directly calculated under the premise of consideration of the furnace material descending, the influence of the bottom layer material surface shape, and the influence of the furnace material collapsing, and by comparing the corresponding relationship between the material distribution and the gas flow distribution and by controlling the furnace top gas flow distribution through the targeted material distribution, the precise gas flow adjusting is achieved, and the empirical blast furnace top gas flow control is improved to the quantification level so as to achieve the stable and smooth operating of the blast furnace.
Description
Technical field
The invention belongs to blast furnace operation technology field, particularly relates to one kind phased-array radar measurement blast furnace charge level ore coke ratio
Method to control blast furnace air flow method.
Background technology
Blast furnace, will disappear to flow reactor daily as a multivariable, large time delay, nonlinear super-huge molten iron production
The extremely huge material of consumption, energy, with a 5000m3Large-scale modernized blast furnace as a example by, daily will 12000 tons or so of production
The pig iron, consume 20000 tons or so of ore, burn 6000 tons or so of fuel, produces 4000 tons or so of slag, produces
25000 tons or so of CO2, huge material stream, energy stream all will be completed in 24 hours in blast furnace, so huge in blast furnace
It is completing all the time in the way of artificial that big material, energy, information are exchanged.There is no in the world at present and come with computer
Realize the precedent of blast furnace process control.
Blast furnace burden loads from top, and bottom blasts 1200 DEG C or so of hot blast from air port, hot blast by the coke of tuyere area,
Coal dust firing, while producing 2300 DEG C or so of coal gas of high temperature, coal gas is mainly by CO, N2Composition, can be in blast furnace after fuel combustion
Tuyere area forms space, and furnace charge above progressively falls, and reducing gas below is gradually increasing, by one side of this two-phase flow
Furnace charge is heated in face, on the other hand realizes the reduction of furnace charge using reducing gas.So, the distribution of upper blast furnace furnace charge and wind
Just into the whether smooth key factor of blast furnace process is determined, the purpose of cloth mainly controls height to the distribution situation of mouth region air-flow
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 entering smelting state, bottom house can not do physically changed in process of production, also
It is to adjust incoming air area, air port size, so the adjustment of air-flow is mainly by top cloth by controlling dividing for upper air
Cloth is completing.
The core of blast furnace operating controls 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
Measure, the burden distribution in order to obtain blast furnace roof is further precisely controlled air flow method, for many years blast furnace worker
Substantial amounts of fruitful work is carried out, has been made some progress.
Document " Diao Sheng, Wang Ge, Liu Chuansheng, etc. application [J] of the stove item infrared photography monitoring system on blast furnace.
Steel vanadium titanium, 2002,23 (3)：The side being estimated to burden distribution situation using furnace roof infrared image is discussed in 54-58. "
Method, this technology is by the temperature change of furnace roof charge level during direct measurement cloth come indirect assessment cloth and air flow method shape
Condition, as furnace charge surface temperature depends on gas stream in the stove distribution, blanking velocity, the shape of charge level for loading kind, charge weight, lower floor
Etc. factor, thus the Temperature Distribution measured of the shape of charge level formed by same burden distribution matrix difference, also than larger, is depended merely on sometimes
Observation top temperature distribution is larger directly to assess air flow method error.
Document " Chen Lingkun, Wang Zhigang, Zhao Si, Yu Zhongjie, the research based on the gas fluid in blast furnace assessment system of image procossing
With application, metallurgical industry publishing house, 2007-2007 China Steel annual meetings (CD) " on the basis of furnace roof infrared survey
A kind of method processed to observed image by utilization image pattern recognition is proposed, the method passes through mode identification technology
Standard picture when can identify that peripheral condition is stablized relatively, by these image construction case libraries, can by the matching of image
To count the frequency that various images occur in certain hour, and then the change of assessment blast furnace air-flow, this method is substantially improved
The utilization ratio of furnace roof infrared image, burden condition change less, operation policy there is no great variety when this method be can
Capable, once but there is the change that big change may result in standard cases in blast furnace materials structure, once process not in time will
Lower Evaluated effect, simultaneously because gas stream in the stove is mingled with substantial amounts of dust when rising, measurement signal distortion is larger, and measures
Signal sampling mouth easily piles up dust, affects signal quality, is also in this way a kind of indirect measurement method, 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 directly using the temperature measuring data of 4 tedges of furnace roof passing judgment on stock gas flow point
Classifying to 4 tedge temperature curves of furnace roof, secondly cloth and its change, the method are first by mode identification technology
It is that this method has 2 defects, and one is same top temperature curve evaluating air flow method of halting by pattern match
Two kinds of air flow methods of possible correspondence, that is to say, that standard cases storehouse depends on the phase of cloth, raw material and fuel quality, operating condition of blast furnace
To stable, once the big ups and downs for the external conditions such as crude fuel occur will cause the change of case library, reduction is matched by this to be known
Other precision, reduction accurately identify the probability of state of arts.
Document " application of Jiang Huiyan, Xu Guiqing, the Zhou Jianchang .BP algorithms in the identification of gas fluid in blast furnace distribution pattern is favored with. east
Northern college journal：Natural science edition, 2000,21 (2)：144-146." in [4] there is provided using furnace roof cross temperature measurer commenting
The method of valency furnace roof air flow method, cross temperature equally receive cloth, bottom shape of charge level, furnace charge species, cloth batch weight, cloth section
The impact of various factors such as play, measure the Temperature Distribution that the Temperature Distribution for obtaining not is furnace roof charge level, only measurement bar
Temperature Distribution, as measurement bar is for scaling loss general all bands cooling, so measurement result can not reflect furnace roof charge level temperature
Real conditions, measurement result are referred to when adjusting only for cloth and air-flow.
In the eighties in last century, nippon iron company once provided a kind of using mechanical material surface stock rod direct measurement
The technology of burden distribution, the technology can accurately determine shape of charge level, but have that equipment is huge, and time-consuming for measurement, Ordnance Protection
Difference, the shortcomings of fragile, it is difficult to which long-time stable is used for material surface measurement, this seriously inhibits the popularization 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." there is provided the method with particle flow theory structure cloth Mathematical Modeling, the method can calculate the shape of charge level after cloth,
But as the true rolling process of furnace charge particle is difficult to simulate, the method is a kind of exemplary model construction method, make
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 as cloth doses of blast furnace is big, furnace charge is in stove
Distributed process by furnace charge declines, bottom shape of charge level, air-flow risings, heat transfer, furnace charge rolling and landing etc. a variety of factors
Impact, cloth forming process is relative complex, and different cloth patterns can obtain same shape of charge level, in view of lacking at present
Charge level direct detection equipment, it is difficult to obtain the details of burden distribution, just causes very big difficulty to exact distributing, at present
Air flow method of being adjusted by cloth remains in the experience stage, especially fine-tunes even more so.
The content of the invention
It is an object of the present invention to provide a kind of realize that what accurate air-flow adjusted measures blast furnace charge level ore deposit with phased-array radar
Coke ratio is come the method that controls blast furnace air flow method.
For achieving the above object, it is provided by the present invention to measure blast furnace charge level ore coke ratio to control blast furnace with phased-array radar
The method of air flow method, comprises the steps：
1) target O/C under the different working of a furnaces is determined than distribution curve and set up air-flow adjustment case library
1.1) set up blast furnace phased-array radar cloth Test database：Every batch of cloth is sampled using phased-array radar
And the cloth detection data of each measurement point is recorded, then it is stored in cloth Test database；
1.2) O/C for calculating every batch of cloth according to the cloth detection data 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, then will be all O/C for obtaining more discrete than distribution curve Jing after be stored in discrete data storehouse
In；
1.4) O/C is set up than distribution curve case library：With Preset Time segment data as case space, repeat step 1.1)～
1.3) O/C is set up than distribution curve case library；
1.5) standard O/C is set up than distribution curve case library：Pattern-recognition is carried out using k-means algorithms, to step
1.4) in, a variety of O/C are classified than distribution curve, obtain M class distribution patterns, and M classes distribution pattern constitutes standard O/C
Than distribution curve case library；
1.6) determine that 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) set up blast furnace air flow method detection data：The factor for affecting blast furnace air flow method is sampled and will be sampled
Detection data preserved；
1.8) according to step 1.7) in blast furnace air flow method detection data set up air flow method database；
1.9) by corresponding target O/C under the different working of a furnaces than distribution curve on the basis of gas flow optimized pattern and scope are carried out
Classification：The standard of the working of a furnace includes four kinds, such as furnace temperature fluctuation, and type of furnace fluctuation, hearth accumulation, gas permeability, direct motion deteriorate；
1.10) build the air-flow adjustment case library for O/C being utilized under the different working of a furnaces than controlling air-flow：
(1) air-flow adjustment case libraries of the O/C than control air-flow is utilized under furnace temperature fluctuation situation；
(2) air-flow adjustment case libraries of the O/C than control air-flow is utilized under type of furnace fluctuation situation；
(3) air-flow adjustment case libraries of the O/C than control air-flow is utilized under hearth accumulation situation；
(4) air-flow adjustment case libraries of the O/C than control air-flow is utilized under gas permeability, direct motion impaired condition；
2) select air-flow adjustment case library and determine Dispensing principle：
2.1) set up the blast furnace condition monitor data storehouse for matching air-flow adjustment case library：To be used for describing blast furnace situation
Monitoring Data be stored in blast furnace condition monitor data storehouse；
2.2) the air-flow adjustment case library according to needed for working of a furnace present situation is selected；
2.3) determine the air-flow Dispensing principle under the different working of a furnaces；
2.4) current-controlled target is reached than distribution by cloth adjustment furnace roof O/C：Calculated using phased-array radar
Actual O/C carries out Curve Matching in adjusting case library from corresponding air flow, judges that currently practical O/C is more bent than distribution 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
Differences of the O/C than distribution curve is planted, the principle of cloth adjustment is provided, so as to realize the control to air flow method.
Further, the step 1.2) detailed process be：According to calculating under every batch of cloth different-diameter position
Expect speed, the location coordinate information fallen behind under each measurement point coke in every batch of cloth of calculating and while the current calculating when institute of calculating
The three-dimensional coordinate position information of the ore bed of material of correspondence time period, so that calculate the O/C of every batch of cloth than distribution surface, and by institute
Some O/C are stored in O/C than in distribution curved surface data storehouse than distribution surface.
Further, the step 1.6) detailed process be：With gas utilization rate, usage factor and smooth operation of furnace index
For standard, standard O/C is passed judgment on than distribution curve than the O/C in distribution curve case library, it is determined that 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 step 1.7) in affect the factor of air flow method to include material quality and performance, blast furnace cooling
The cloth information that is related in wall temperature situation, blast furnace material distribution matrix, blast furnace air parameter, blanking time, blast change, furnace roof pressure
It is related in power, Static Pressure Distribution In The B. F. Shaft changing value, cupola well and bottom temperature information, the information of tapping a blast furnace of slagging tap, wherein blast furnace material distribution matrix
Cloth information includes species, quantity, cloth stockline depth-set, cloth order, angle position and the number of rings of feed stock for blast furnace.
Further, the step 1.8) detailed process be：By step 1.7) in detection data by building the form of table
It is stored in air flow method database, and class data sets up a table.
Further, the step 2.2) detailed process be：According to affecting, the Characteristic factors identification of air flow method is 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 processed successively.
Further, the step 2.3) air-flow Dispensing principle is specially：The air-flow Dispensing principle of furnace temperature fluctuation situation is
Moved towards come adjusting furnace temperature by furnace charge load；The air-flow Dispensing principle of type of furnace fluctuation situation is by adjusting edge, two strands of center
Air-flow is being adjusted；The air-flow Dispensing principle of hearth accumulation situation is enlivening cupola well with the mode of central gas stream is got through；Thoroughly
Gas, the air-flow Dispensing principle of direct motion impaired condition are to be adjusted by way of adjusting edge, two strands of center air-flow.
The invention has the beneficial effects as follows：Considering what furnace charge decline, the impact of bottom shape of charge level and furnace charge slump affected
Under the premise of, the O/C of roof material distributing is directly calculated than distribution situation, by comparing the corresponding relation between cloth and air flow method,
Furnace roof air flow method is controlled by targetedly cloth, so as to realize that accurately air-flow is adjusted, by empirical State of Blast Furnace
Top gas flow control lifts to the level for quantifying, and realizes the stable smooth operation of blast furnace.
Description of the drawings
Fig. 1 be the present embodiment step 1) schematic flow sheet；
Fig. 2 be the present embodiment step 2) schematic flow sheet.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail.
The method is implemented on into internal volume 5000m3Blast furnace, two grades of machines of the blast furnace are provided with two sets of oracle database systems
System, using C++ programming languages, including four sets of PLC systems relevant with cloth, coal powder injection control, two sets for cloth control, it is a set of
It is for cupola well furnace bottom Detection ＆ Controling, a set of for breeze blowing control, a set of DCS system, for the regulation etc. of air blast parameter,
Set up two Database Systems.
Method its step for measuring blast furnace charge level ore coke ratio to control blast furnace air flow method with phased-array radar is as follows：
1) target O/C under the different working of a furnaces is determined than distribution curve and set up air-flow adjustment case library, as shown in figure 1,
1.1) set up blast furnace phased-array radar cloth Test database：
With 5000m3As a example by large blast furnace, in blast furnace top gearbox bottom, the top perforate of furnace roof frustum, phased array is installed
Radar equipment, as long as ensure measurement point from cloth vertical range more than 4.5 meters, it is possible to ensure using a device measuring to whole
Individual cloth.The cloth detection data of each measurement point, Ran Houbao is sampled and is recorded using phased-array radar to every batch of cloth
Exist in cloth Test database.Phased-array radar sample information and sample frequency such as table 1
Table 1
1.2) O/C for calculating every batch of cloth according to the cloth detection data in cloth Test database compares distribution surface：One
Criticizing cloth includes coke and ore, only just carries 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 of calculating
Put coordinate information and while when calculating current calculating the ore bed of material of corresponding time period three-dimensional coordinate position information, considering
After 15% or so coke layer slump amendment, so as to calculate the O/C of every batch of cloth than distribution surface, and by all of O/C scores
Cloth curved surface is stored in O/C than in distribution curved surface data storehouse.
1.3) O/C for calculating any direction compares distribution curve：In view of normal cloth is circumferentially symmetrical, it is easy rising
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 score
Cloth curved surface takes the ore coke ratio distribution in a direction and obtains an O/C than distribution curve, and every curve includes the data of 30 or so,
Then it is stored in discrete data storehouse after will be all O/C for obtaining more discrete than distribution curve Jing.
1.4) O/C is set up than distribution curve case library：With one-year age segment data as case space, O/C is set up than distribution
Curve case library.5000m3The daily feed stock for blast furnace batch of blast furnace at 160～180 batches or so, repeat step 1.1)～1.3), daily
160～180 O/C can be obtained than distribution curve case, the case amount of a year is at 7～80,000 or so；
1.5) standard O/C is set up than distribution curve case library：Pattern-recognition is carried out using k-means algorithms, to step
1.4) in, a variety of O/C are classified than distribution curve, obtain 36 class distribution patterns, and 36 class distribution patterns constitute standard O/
C is than distribution curve case library；
1.6) determine that 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 at that time, pressure reduction, more bent than distribution to standard O/C
O/C in line case library is passed judgment on than distribution curve, it is determined that target O/C under the different working of a furnaces is than distribution curve, and not
Different feature furnace parameters be correspond to the working of a furnace.5000m3Blast furnace basis for estimation such as table 2：
Table 2
1.7) set up blast furnace air flow method detection data：The factor for affecting blast furnace air flow method is sampled and will be sampled
Detection data preserved, wherein, affect air flow method factor include material quality and performance, blast furnace cooling stave temperature shape
The cloth information that is related in condition, blast furnace material distribution matrix, blast furnace air parameter, blanking time, blast change, furnace top pressure, shaft
The cloth information being related in static pressure changing value, cupola well and bottom temperature information, the information of tapping a blast furnace of slagging tap, wherein blast furnace material distribution matrix
Species, quantity, cloth stockline depth-set, cloth order, angle position and number of rings including feed stock for blast furnace.The number of various detection datas
Amount and sample frequency such as table 3：
Table 3
1.8) according to step 1.7) in blast furnace air flow method detection data set up air flow method database：By step 1.7) in
Detection data is stored in air flow method database by the form for building table, and class data set up a table.Such as table 4；
Table 4
1.9) by corresponding target O/C under the different working of a furnaces than distribution curve on the basis of gas flow optimized pattern and scope are carried out
Classification：The standard of the working of a furnace includes four kinds, such as furnace temperature fluctuation, and 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 every kind of situation is constituted into data sample during classification, a kind of state of air flow method is represented, is treated sample
Sample Storehouse is classified automatically after the completion of arrangement, it is the corresponding classification results of every kind of situation that institute is sub-category.
In addition, the different working of a furnaces correspond to different feature furnace parameters such as table 5
Table 5
1.10) build the air-flow adjustment case library for O/C being utilized under the different working of a furnaces than controlling air-flow：
(1) air-flow adjustment case libraries of the O/C than control air-flow is utilized under furnace temperature fluctuation situation；For 5000m3Blast furnace and
Speech, the case library include 16 kinds of cases；
(2) air-flow adjustment case libraries of the O/C than 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) air-flow adjustment case libraries of the O/C than control air-flow is utilized under hearth accumulation situation；For 5000m3Blast furnace and
Speech, the case library include 8 kinds of cases；
(4) air-flow adjustment case libraries of the O/C than control air-flow is utilized under gas permeability, direct motion impaired condition；For 5000m3
For blast furnace, the case library includes 22 kinds of cases.
2) select air-flow adjustment case library and determine Dispensing principle：As shown in Fig. 2
2.1) set up the blast furnace condition monitor data storehouse for matching air-flow adjustment case library：
In step 1) in complete air-flow under the various working of a furnaces and adjust the foundation of case library, it is determined that the type of furnace is abnormal, furnace temperature
Air-flow adjustment case library when abnormal, furnace cylinder working situation is abnormal, blast furnace blanking is bad, contains in these case libraries each specific
The O/C of the working of a furnace than distribution curve, characterize the characteristic parameter of the specific working of a furnace.Will be using 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, it is special to judge whether the current working of a furnace fall into these
In the working of a furnace, this judgement is that, based on blast furnace process detection data, these data describe blast furnace situation, needs calculated in advance to go out
Come, and be stored in database.Such as table 6：
Table 6
2.2) the air-flow adjustment case library according to needed for working of a furnace present situation is selected：According to the Characteristic factors for affecting 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, being adjusted due to the cloth under the various working of a furnaces when concentrating and occurring respectively has feature, sometimes even
Phenomenon contradictory each other occurs, is accomplished by the causality each other according to the working of a furnace in this case, determines excellent
The stove first adjusted,.State recognition here according to influence factor goes out to need the working of a furnace to be processed, 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 processed successively.The feature working of a furnace
The materialization of parameter such as table 7, i.e. parameter：
Table 7
2.3) determine the air-flow Dispensing principle under the different working of a furnaces：Air-flow Dispensing principle is specially：The gas of furnace temperature fluctuation situation
Stream Dispensing principle is to be moved towards come adjusting furnace temperature by furnace charge load；The air-flow Dispensing principle of type of furnace fluctuation situation is by adjusting side
Edge, two strands of center air-flow are being adjusted；The air-flow Dispensing principle of hearth accumulation situation be with get through the mode of central gas stream come
Enliven cupola well；Gas permeability, the air-flow Dispensing principle of direct motion impaired condition are to be entered by way of adjusting edge, two strands of center air-flow
Row is adjusted.
2.4) current-controlled target is reached than distribution by cloth adjustment furnace roof O/C：Calculated using phased-array radar
Actual O/C carries out Curve Matching in adjusting case library from corresponding air flow, judges that currently practical O/C is more bent than distribution 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
Differences of the O/C than distribution curve is planted, the principle of cloth adjustment is provided, so as to realize the control to air flow method.
As O/C is to be stored in after discretization in database than distribution curve, for relatively just turning for two kinds of curves
The comparison of thickness is changed into.Actual O/C is deducted than distribution curve thickness with target O/C than distribution curve thickness, it is poor by observing
The feature of value determines cloth adjustment direction, generates new burden distribution matrix.Such as fringe region is on the occasion of then increasing edge, center
Domain is on the occasion of then increasing center.
3) by step 2.4) burden distribution matrix that generates, by the PLC system of dispensing under control flume, and control roof material distributing
PLC system, realizes the enforcement of new burden distribution matrix, reaches conditioning of BF target by constantly matching, adjustment, so as to realize stove
Cylinder, the type of furnace, furnace temperature, gas permeability, the target of direct motion adjustment.
Claims (7)
1. a kind of phased-array radar measures blast furnace charge level ore coke ratio the method that controls blast furnace air flow method, it is characterised in that：
Control method comprises the steps：
1) target O/C under the different working of a furnaces is determined than distribution curve and set up air-flow adjustment case library
1.1) set up blast furnace phased-array radar cloth Test database：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 for calculating every batch of cloth according to the cloth detection data in cloth Test database compares distribution surface；
1.3) O/C for calculating any direction compares distribution curve：Each O/C is distributed than the ore coke ratio that distribution surface takes a direction
To an O/C than distribution curve, then will be all O/C for obtaining more discrete than distribution curve Jing after be stored in discrete data storehouse；
1.4) O/C is set up than distribution curve case library：With Preset Time segment data as case space, repeat step 1.1)～1.3)
O/C is set up than distribution curve case library；
1.5) standard O/C is set up than distribution curve case library：Pattern-recognition is carried out using k-means algorithms, to step 1.4) in
A variety of O/C are classified than distribution curve, obtain M class distribution patterns, and M classes distribution pattern constitutes standard O/C than distribution
Curve case library；
1.6) determine that 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) set up blast furnace air flow method detection data：The inspection that the factor for affecting blast furnace air flow method is sampled and will be sampled
Survey data to be preserved；
1.8) according to step 1.7) in blast furnace air flow method detection data set up air flow method database；
1.9) by corresponding target O/C under the different working of a furnaces than distribution curve on the basis of gas flow optimized pattern and scope are carried out point
Class：The standard of the working of a furnace includes four kinds, such as furnace temperature fluctuation, and type of furnace fluctuation, hearth accumulation, gas permeability, direct motion deteriorate；
1.10) build the air-flow adjustment case library for O/C being utilized under the different working of a furnaces than controlling air-flow：
(1) air-flow adjustment case libraries of the O/C than control air-flow is utilized under furnace temperature fluctuation situation；
(2) air-flow adjustment case libraries of the O/C than control air-flow is utilized under type of furnace fluctuation situation；
(3) air-flow adjustment case libraries of the O/C than control air-flow is utilized under hearth accumulation situation；
(4) air-flow adjustment case libraries of the O/C than control air-flow is utilized under gas permeability, direct motion impaired condition；
2) select air-flow adjustment case library and determine Dispensing principle：
2.1) set up the blast furnace condition monitor data storehouse for matching air-flow adjustment case library：To be used for describing the prison of blast furnace situation
Survey data and be stored in blast furnace condition monitor data storehouse；
2.2) the air-flow adjustment case library according to needed for working of a furnace present situation is selected；
2.3) determine the air-flow Dispensing principle under the different working of a furnaces；
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 than distribution curve is 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 realize the control to air flow method.
2. measure blast furnace charge level ore coke ratio to control the side of blast furnace air flow method with phased-array radar according to claim 1
Method, it is characterised in that：The step 1.2) detailed process be：According to the blanking speed calculated along every batch of cloth different-diameter position
Degree, the location coordinate information for falling behind under each measurement point coke and while calculates corresponding during current calculating in calculating every batch of cloth
The three-dimensional coordinate position information of the ore bed of material of time period, so as to calculate the O/C of every batch of cloth than distribution surface, and will be all of
O/C is stored in O/C than in distribution curved surface data storehouse than distribution surface.
3. measure blast furnace charge level ore coke ratio to control the side of blast furnace air flow method with phased-array radar according to claim 1
Method, it is characterised in that：The step 1.6) detailed process be：With gas utilization rate, usage factor and smooth operation of furnace index it is
Standard, passes judgment on than distribution curve than the O/C in distribution curve case library to standard O/C, it is determined that the mesh under the different working of a furnaces
Mark O/C is than distribution curve, and the different working of a furnaces correspond to different feature furnace parameters.
4. measure blast furnace charge level ore coke ratio to control the side of blast furnace air flow method with phased-array radar according to claim 1
Method, it is characterised in that：The step 1.7) in affect air flow method factor include material quality and performance, blast furnace cooling stave temperature
The cloth information that is related in degree situation, blast furnace material distribution matrix, blast furnace air parameter, the blanking time, blast change, furnace top pressure,
The cloth being related in Static Pressure Distribution In The B. F. Shaft changing value, cupola well and bottom temperature information, the information of tapping a blast furnace of slagging tap, wherein blast furnace material distribution matrix
Information includes species, quantity, cloth stockline depth-set, cloth order, angle position and the number of rings of feed stock for blast furnace.
5. measure blast furnace charge level ore coke ratio to control the side of blast furnace air flow method with phased-array radar according to claim 1
Method, it is characterised in that：The step 1.8) detailed process be：By step 1.7) in detection data by build table form preserve
In air flow method database, and class data set up a table.
6. measure blast furnace charge level ore coke ratio to control the side of blast furnace air flow method with phased-array radar according to claim 1
Method, it is characterised in that：The step 2.2) detailed process be：According to the Characteristic factors identification feature stove for affecting air flow method
Condition parameter, enables corresponding air-flow adjustment case library according to feature furnace parameter；And according to " hearth accumulation situation → furnace temperature fluctuation
The order that situation → type of furnace fluctuation situation → gas permeability, direct motion impaired condition " is adjusted is processed successively.
7. measure blast furnace charge level ore coke ratio to control the side of blast furnace air flow method with phased-array radar according to claim 1
Method, it is characterised in that：The step 2.3) air-flow Dispensing principle is specially：The air-flow Dispensing principle of furnace temperature fluctuation situation is to pass through
Furnace charge load carrys out adjusting furnace temperature trend；The air-flow Dispensing principle of type of furnace fluctuation situation is by adjusting edge, two strands of center air-flow
To be adjusted；The air-flow Dispensing principle of hearth accumulation situation is enlivening cupola well with the mode of central gas stream is got through；Gas permeability,
The air-flow Dispensing principle of direct motion impaired condition is to be adjusted by way of adjusting edge, two strands of center air-flow.
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| CN113065222A (en) * | 2021-02-20 | 2021-07-02 | 武汉钢铁有限公司 | Method and device for evaluating state of hearth |
| CN114875188A (en) * | 2022-05-27 | 2022-08-09 | 本溪北营钢铁（集团）股份有限公司 | Material distribution method for quickly adjusting blast furnace edge airflow |
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