CN101560599B - Thickness control method and control system of mixed material layer - Google Patents
Thickness control method and control system of mixed material layer Download PDFInfo
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- CN101560599B CN101560599B CN2009101353160A CN200910135316A CN101560599B CN 101560599 B CN101560599 B CN 101560599B CN 2009101353160 A CN2009101353160 A CN 2009101353160A CN 200910135316 A CN200910135316 A CN 200910135316A CN 101560599 B CN101560599 B CN 101560599B
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Abstract
The invention relates to a thickness control method of a mixed material layer, comprising the following steps of: acquiring round roller speed, round roller output coefficient, speed of mixed materialsintering, width of a sintering pallet and density of the mixed material; multiplying the round roller speed with the round roller output coefficient to obtain a product which is then divided by the product of the speed of the mixed material sintering, the width of the sintering pallet and the density of the mixed material to obtain a quotient which is taken as the current thickness of the mixed material layer; and regulating the ratio between the round roller speed and the speed of the mixed material sintering to cause the current thickness of the mixed material layer to be close to the set layer thickness. The invention also discloses a thickness control system of the mixed material layer. The method realizes control to the thickness of the mixed material layer by a soft-sensing mode, thus not only saving the production and maintenance cost of a manufacturer, but also having the advantages of stable and reliable control, etc.
Description
Technical field
The present invention relates to the steel sintering field, particularly relate to the compound layer thickness control problem on the sintering pallet in sintering process.
Background technology
Referring to Fig. 1, be the agglomeration for iron mine system schematic, ore deposit groove group 10 comprises a plurality of ore deposits groove, each ore deposit groove is equipped with a kind of raw material, raw material comprises smart iron ore, flux, fuel and assorted material etc., during work, each ore deposit groove of ore deposit groove group 10 is dumped into plurality of raw materials on the amalgamation belt 11 of below by a certain percentage, amalgamation belt 11 mixes various raw materials, send into primary mixer 12 and once add water, be transported to second drum mixer 14 and carry out secondary and add water by mixing two belts 13 again, form compound, more successively through burning a belt 15, burning two belts 16 and be transported to mixing container 17.
Mixing container 17 is surge bins, and the material level that is used to keep certain is sintering pallet 19 feed.During feed, mixing container 17 is transported to compound on the nine roller material distributing machine 18 earlier, nine roller material distributing machine 18 again with compound cloth on sintering pallet 19.For ease of the roasting of compound, on sintering pallet 19, lay one deck grate-layer material earlier, the grate-layer material top re-lays compound, sintering pallet 19 moves in blast furnace, mixture roasting is become sinter, after broken, cooling, screening, be transported to 20 storages of finished product ore storage bin.
In above-mentioned agglomeration for iron mine system, the compound bed thickness on the sintering pallet 19 is the important parameter that is related to sintering quality, and the compound bed thickness is excessive, compound can not be grilled thoroughly fully, the compound bed thickness is too small, and compound is sintering excessively, and this all is unfavorable for the sintering of compound.The compound bed thickness also is the important parameter that the agglomeration for iron mine system regulates material balance, material ventilation property, sintering velocity.
At present, prior art mostly adopts in the instrument measurement mode and obtains compound bed thickness on the sintering pallet 19, and mounting layer thickness detector table before the ignition furnace (not shown) detects the compound bed thickness that enters sinter machine.But in actual use, operating troubles often takes place in sinter machine, when the vacuum fan (not shown) below sintering pallet 19 breaks down, igniting does not stop, the temperature of ignition furnace annex is very high, often burn out the bed thickness measuring instrument, the price of bed thickness measuring instrument is very expensive, and often changing to increase the manufacturer production cost.
The bed thickness measuring instrument also can cause system can't obtain compound bed thickness parameter after damaging, and can not effectively control the compound bed thickness.
Summary of the invention
Technical problem to be solved by this invention provides a kind of control method of compound bed thickness, and this control method can effectively be controlled the compound bed thickness.
Another object of the present invention provides a kind of Controlling System of compound bed thickness, and this Controlling System can effectively be controlled the compound bed thickness.
The control method of a kind of compound bed thickness of the present invention comprises: obtain round roller speed, circle roller output coefficient, compound agglomerating speed, sintering pallet width and mixture density; Described round roller speed and circle roller output coefficient are multiplied each other, and the product that obtains is long-pending divided by compound agglomerating speed, sintering pallet width and mixture density three again, and the merchant who obtains is as current compound bed thickness; Regulate the ratio of described round roller speed and described compound agglomerating speed, make current compound bed thickness near setting bed thickness.
Preferably, the concrete steps of obtaining described round roller output coefficient are: add up mixing container accumulative total input in second time span, add mixing container material level accumulative total variable quantity in second time span, obtain and divided by the integrated value of described round roller speed, the merchant who obtains is circle roller output coefficient.
Preferably, the step of obtaining described mixture density is specially: the total mass of the various materials of feed bin group output in the statistics very first time length; Follow the tracks of the course of conveying of described various materials,, begin to detect the volume of the compound of described mixing container output in the described very first time length when described various mass transport arrive mixing container; Divided by mixture volume, the merchant who obtains is as mixture density with various material total masses.
Preferably, in various material conveying process,, detect the quality of the new material of input in very first time length if any new material input, with the total mass of described various materials and the quality addition of described new material, the total mass that obtains and be updated to various materials.
Preferably, the volume of the compound of described mixing container output also comprises simultaneously in detecting described very first time length: the material level variable quantity that detects described mixing container in described very first time length; With the total mass and the addition of described material level variable quantity of described various materials, the total mass that obtains and be updated to various materials.
Preferably, respectively travelling speed variable, compound thickness variable and the time of sintering pallet are carried out integration 3 times, obtain the integral result in the described very first time length, integral result be multiply by the sintering pallet width again, the numerical value that obtains is as the volume of compound.
Preferably, also comprise: establishing described very first time length is first computation period, and the mixture density that calculates is as first mixture density; If described second time span is second computation period, the mixture density that calculates is as second mixture density; First, second mixture density be multiply by first, second weighting coefficient respectively, again with the product addition, obtain and be updated to mixture density.
The Controlling System of a kind of compound bed thickness of the present invention comprises round roller speed acquiring unit, circle roller output coefficient acquiring unit, compound agglomerating speed acquiring unit, sintering pallet width acquisition unit, mixture density acquiring unit, current compound bed thickness computing unit, reaches compound bed thickness adjustment unit; Described round roller speed acquiring unit, circle roller output coefficient acquiring unit, compound agglomerating speed acquiring unit, sintering pallet width acquisition unit and mixture density acquiring unit are respectively applied for and obtain round roller speed, circle roller output coefficient, compound agglomerating speed, sintering pallet width and mixture density; Described current compound bed thickness computing unit, be used for described round roller speed and circle roller output coefficient are multiplied each other, the product that obtains is long-pending divided by compound agglomerating speed, sintering pallet width and mixture density three again, and the merchant who obtains is as current compound bed thickness; Described compound bed thickness adjustment unit is used to regulate the ratio of described round roller speed and described compound agglomerating speed, makes current compound bed thickness near setting bed thickness.
Preferably, described round roller output coefficient acquiring unit comprises that the mixing container work output obtains subelement, compound output speed computation subunit, and circle roller output coefficient computation subunit; Described mixing container work output is obtained subelement, is used to add up mixing container accumulative total input in second time span, adds mixing container material level accumulative total variable quantity in second time span, obtains the mixing container work output; Described compound output speed computation subunit is used for described round roller rate integrating is obtained the compound output speed; Described round roller output coefficient computation subunit is used for the mixing container work output divided by the compound output speed, obtains circle roller output coefficient.
Preferably, described mixture density acquiring unit comprises that specifically the total mass of various materials obtains the volume of subelement, compound and obtain subelement, and mixture density computation subunit; The total mass of described various materials is obtained subelement, is used to add up the total mass of the various materials of feed bin group output in the very first time length; The volume of described compound obtains subelement, is used to follow the tracks of the course of conveying of described various materials, when described various mass transport arrive mixing container, begins to detect the volume of the compound of described mixing container output in the described very first time length; Described mixture density computation subunit is used for various material total masses divided by mixture volume, and the merchant who obtains is as mixture density.
Compared with prior art, the present invention has the following advantages:
The present invention is by detection and the control of soft metering system realization to the compound bed thickness, this control method not only avoids using expensive bed thickness measuring instrument, save the production maintenance cost of producer, and control method can also prevent because of the bed thickness metrical instrument damages the control instability bring, and has control stabilization, advantage such as reliable.
Description of drawings
Fig. 1 is the agglomeration for iron mine system schematic;
Fig. 2 is the control method one embodiment schema of compound bed thickness provided by the invention;
Fig. 3 is an agglomeration for iron mine system schematic of the present invention;
Fig. 4 is another synoptic diagram of agglomeration for iron mine of the present invention system;
Fig. 5 is a mixture density renewal process schema;
Fig. 6 is the Controlling System synoptic diagram of first embodiment of the invention compound bed thickness;
Fig. 7 is the Controlling System synoptic diagram of second embodiment of the invention compound bed thickness;
Fig. 8 is the Controlling System synoptic diagram of third embodiment of the invention compound bed thickness.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The present invention adopts soft-measuring technique, utilize the current compound bed thickness of other calculation of parameter in the compound sintering process, again by controlling the sintering velocity of compound, make current compound bed thickness near predefined compound bed thickness, avoid adopting the bed thickness metrical instrument to measure, promptly save cost, again control stabilization.
Referring to Fig. 2, control method one embodiment of compound bed thickness provided by the invention is shown, specifically may further comprise the steps.
Step S201, obtain round roller speed, circle roller output coefficient, compound agglomerating speed, sintering pallet width and mixture density.Circle roller speed can obtain by detecting nine roller material distributing machine, 18 travelling speed; Compound agglomerating speed can detect sintering pallet 19 travelling speed by speed and obtain; The sintering pallet width is suitable with sintering pallet 19 width, is generally constant; Circle roller output coefficient and mixture density need obtain by soft measurement.
Step S202, will justify roller speed and circle roller output coefficient multiplies each other, the product that obtains is long-pending divided by compound agglomerating speed, sintering pallet width and mixture density three again, and the merchant who obtains is as current compound bed thickness.That is:
CH_Current=yg_speed*K/ (sp_speed*desinity*ch) formula 1;
Wherein, CH_Current is current compound bed thickness, and yg_speed is circle roller speed; K is circle roller output coefficient; Sp_speed compound agglomerating speed; Desinity is a mixture density; Ch sintering pallet width.
Step S203, regulate the ratio of described round roller speed and described compound agglomerating speed, make current compound bed thickness near setting bed thickness.More current compound bed thickness and predefined bed thickness compare, and regulate the ratio of described round roller speed and described compound agglomerating speed by PID (proportion integration differentiation) mode, make current compound bed thickness as far as possible near predefined bed thickness.
The present invention is by the control of soft metering system realization to the compound bed thickness, this control method not only avoids using expensive bed thickness measuring instrument, save the production maintenance cost of producer, and control method can also prevent because of the bed thickness metrical instrument damages the control instability bring, and has control stabilization, advantage such as reliable.
In the calculating of formula 1, the calculating of circle roller output coefficient is a key point, the present invention adds up mixing container accumulative total input in for some time, add that this section closes hopper material level accumulative total variable quantity in the period, as the mixing container work output, use the integrated value of the work output of mixing container again, obtain circle roller output coefficient divided by sintering velocity.That is:
K＝∑Wout/∫∫adyg_speed*dt
∑ Wout=∑ Win+ ∑ 1v1 formula 2
Wherein, sp_k is the output coefficient of mixing container.
Wherein, ∑ Win is a mixing container accumulative total input in second time span; ∑ 1v1 is a mixing container material level accumulative total variable quantity in second time span; ∑ Wout is the mixing container work output; A is a correction factor, and span is 0.90-1.10.
In the calculating of formula 1, accurately obtaining of mixture density also is a key, and the present invention adopts the tracking detection mode, gets access to this numerical value.
The present invention adds up the total mass of the various materials of feed bin group 10 outputs in for some time, follow the tracks of the course of conveying of various materials again, behind various material input mixing containers 17, be object with compound ore deposit groove 17 again, detect the mixture volume of mixing container 17 outputs in the identical time span, like this, by following the tracks of the course of conveying of the various materials of forming compound, quite good detecting goes out the quality of current compound in the mixing container 17, making the mixture quality and the volume of detection is same batch of compound, again with the mixture quality that detects divided by mixture volume, obtain the current density value of compound.Feed bin group 10 of the present invention is meant the batching feed bin group of raw material ore storage bin.
Referring to Fig. 3, burn two belts 16 compound sent into mixing container 17, mixing container 17 is transported to compound on the nine roller material distributing machine 18 again, by nine roller material distributing machine 18 with compound cloth on sintering pallet 19.By regulate burning the compound amount that two belts 16 carry and the cloth speed of nine roller material distributing machine 18, with regard to the feeding and the load of may command mixing container 17, allow the feeding of mixing container 17 and load about equally, keep the material level of mixing container 17 stable.Like this, only need the total mass and the volume of exporting compound of the various materials of acquisition mixing container 17 current inputs, can calculate mixture density.The calculating formula is:
Desinity=Qquality/Vout; Formula 3
In the formula 3, desinity is a mixture density, and Qquality is the total mass of the various materials of mixing container 17 current inputs, and Vout is the volume of mixing container 17 output compounds.The discharge opening of the present invention's each ore deposit groove in ore deposit groove group 10 is provided with flow detection equipment, each ore deposit groove is transported to quality of material on the amalgamation belt 11 in the groove group 10 of the interior ore deposit of statistics very first time length, follow the tracks of the course of conveying of described various materials, when described various mass transport arrive mixing container 17, begin to detect the volume Vout of the compound of mixing container 17 outputs in the very first time length.Very first time length can be provided with according to practical situation, and span is 1-120 minute.
Row cite an actual example mixture density detection method of the present invention are described, in detecting 5 minutes, the total mass Qquality of various materials on the amalgamation belt 11 that 10 kinds of each hoppers of feed bin group are carried follows the tracks of the transport process of this batch materials, after 10 minutes, this batch materials is transported to mixing container 17, begin to detect the volume of mixing container 17 output compounds, detect mixing container 17 in identical time span 5 minutes, export the volume Vout of compound altogether, utilize formula 2, calculate the density value of compound.
The present invention follows the tracks of the various material transport process of input, when described various mass transport to mixing container 17, begin to detect the volume of the compound of mixing container 17 outputs, the compound that makes output is that described various material is formed.
In actual application, the instantaneous detected value of flow detection equipment often has bigger fluctuation, can not accurately reflect the flow of material at that time.The present invention is provided with very first time length, detects the various material total masses of hopper group conveying in the very first time length and the volume of mixing container 17 output compounds, and the error of avoiding the momentary fluctuation of flow detection equipment to cause improves accuracy of detection.
In material conveying process, if the input of new material is arranged, will inevitably influence the total mass of material, the present invention detects the quality of this material, the quality of this material is added the total mass of the various materials of initial statistics, as the total mass of the various materials after upgrading.The formula that calculates is:
Qquality=(Qquality 1+Qquality 2+Qquality 3......Qquality N)/Vout; Formula 4
In the formula 4, Qquality represents to obtain at last the total mass of various materials, and Qquality1, Qquality2, Qquality3....QqualityN represent the quality of material that different steps adds respectively.
As shown in Figure 1, the material that silo group 10 is carried adds water treatment in primary mixer 12 and second drum mixer 14, add the total mass that water will inevitably have influence on material.The present invention adopts tracking mode, when the various materials of feed bin group 10 conveyings are sent to primary mixer 12 and second drum mixer 14, detect the quality that primary mixer 12 and second drum mixer 14 add entry, the quality that will add entry adds the quality of the various materials of feeding bin group 10 conveyings, is updated to the total mass of various materials.
For example, adding up each material total mass that feed bin group 10 is carried in 3 minutes earlier is Qquality1, after 2 minutes, this batch materials is transported to primary mixer 12, primary mixer 12 once adds water treatment, begin to detect the amount of water Qquality 2 of primary mixer 12 in 3 minutes, Qquality1+Qquality 2 is updated to the total mass of various materials.Material after once adding water treatment continues to transmit, after 5 minutes, these mass transport are to second drum mixer 14, second drum mixer 14 carries out secondary to these materials and adds water treatment, begin to detect the amount of water Qquality 3 of second drum mixer 14 in 3 minutes, Qquality1+Qquality 2+Qquality 3 is updated to the total mass of various materials.
The present invention is not the quality of the material of different time sections conveying that simply adds up, but by following the tracks of the transport process of first batch of material, in this batch materials transport process, if there is new material to add, detect this new material and in identical time span, add inventory, with initiate quality of material and the addition of former statistics material total mass, as new various material total masses.Because of the each several part of sintering system needs coordinated operation, the travelling speed of each several part is roughly the same, like this, add in the identical time span new material substantially all with first batch of mixing of materials together, with initiate quality of material and the various material total mass addition of former statistics, as new various material total masses, the various material total masses after the renewal can reflect this batch materials real quality at that time.
In some sintering process, feeding in 17 for some time of mixing container and load are also unequal, and at this moment certain variation will take place the material level of mixing container 17, or increases, or reduces.Referring to Fig. 3, the material level of mixing container 17 increases quality Δ l in for some time, and this illustrates the not output fully of compound of input in this section period, and part remains in the mixing container 17.If this section period is detected the volume of mixing container 17 output compounds just, because of the total mass of various materials of statistics has material level variation delta l to remain in the mixing container 17, the volume of the compound that detects not is the volume of the various materials of input, the total mass of the various materials of the volume of compound of detection and statistics is not complementary, this just requires to add the material level variation delta l of this mixing container 17 in various compound total masses, the formula of calculating is:
Desinity=(Qquality+ Δ l)/Vout; Formula 5
For example, when various materials are imported mixing container 17, begin to detect the volume of the output compound of mixing container 17, finish to detecting, material level as this section mixing container 17 in the time increases by 5 tons, the total mass of the various materials of statistics is 50 tons, shows and only export 50+ (5)=45 ton compound, desinity=45/Vout in detection time.
For another example, when various materials are imported mixing container 17, begin to detect the volume of the output compound of mixing container 17, finish to detecting, material level as this section mixing container 17 in the time reduces 5 tons, the total mass of the various materials of statistics is 50 tons, shows output 50+5=55 ton compound in detection time, desinity=55/Vout.
In identical time span, the total mass of the various materials of mixing container 17 inputs and the mixture quality of output are also inequality sometimes, the various materials of input partly remain in the mixing container 17, or former compound in many outputs mixing container 17, the total mass of the various materials of the mixture volume of output and input is not complementary in the feasible identical time span that detects, and causes last calculation result to have error.The utilization of the present invention level gage of weighing detects the material level variation delta l of mixing container 17 in identical time span, in the various material total masses of input mixing container 17, deduct the material level variation delta l of mixing container 17, the mass value that obtains is the mixture quality of output, this mass value is complementary with the mixture volume of the interior output of identical time span of detection, eliminate owing to, make calculation result more accurate in this section error that the variation of mixing container 17 material levels causes in the time.
In actual application, because there is certain error in Equipment Inspection precision such as flow detection equipment, material test set, also can there be certain error in control to identical time span, makes the mixture density of last calculating have less error, and is accurate inadequately.The detection data that the present invention utilizes other approach to obtain are carried out verification to the mixture density that calculates, and have error if find the mixture density that calculates, and can adopt update the system that the mixture density that calculates is revised, and calculate formula and are:
Mixture density=a1 (Qquality+ Δ l)/Vout; Formula 6
In the formula 6, a1 is first correction factor, and the span of a1 is 0.9-1.1, by update the system the mixture density that calculates is revised, and can further improve the computational accuracy of mixture density.
The present invention can adopt the method to flow variable and time 2 integrations of material, and minute to be that step-length is carried out integral and calculating, can eliminate the detection error that flow detection equipment precision problem causes like this when the total mass of the various materials of statistics.To the input quality of certain material, the calculating formula is:
Qquality_1=∫ ∫ dWindt formula 7
In the formula 7, Win is the flow variable of this material, and Qquality_1 is this kind material input quality in the time span of statistics.Same because the precision problem of flow detection equipment, control problem with identical time span, can there be less error in the quality of material that detects, the data that the present invention can utilize other approach to obtain are carried out verification to detected quality of material, there is error if find the quality of material that detects, adopt update the system that the quality of material that detects is revised, the calculating formula is:
Qquality_1=∫ ∫ a2dWindt formula 8
In the formula 8, a2 is second correction factor, and the span of a is 0.9-1.1, by update the system the quality of material that detects is revised, and can further improve the accuracy of detection of quality of material.
Feed bin group 10 of the present invention is in discharge process, and each feed bin in the feed bin group 10 is word order often, and feed bin group 10 belows are from the proal amalgamation belt 11 in back.Therefore, the present invention adopts the total mass of following the tracks of the various materials of feed bin group 10 outputs in the statistical statistics very first time length, the total mass of the various materials of exporting in very first time length with each feed bin of tracking amalgamation belt 11 mode of transport statistics.For example, feed bin group 10 comprises the feed bin a of word order, feed bin b, feed bin c and feed bin d, amalgamation belt 11 moves to feed bin a from feed bin d, 9:30:00 begins, calculate the quality of feed bin d to amalgamation belt 11 convey materials D, after 5 seconds, by the material D of calculated mass by amalgamation belt 11 be transported to feed bin c under, receive the material C that feed bin c carries, from 9:30:05, calculate the quality of feed bin c to amalgamation belt 11 convey materials C, and the like, begin to calculate the quality of feed bin b from 9:30:10 respectively, begin to calculate the quality of feed bin a to amalgamation belt 11 convey materials A from 9:30:15 to amalgamation belt 11 convey materials B.Like this,, add up the material that each feed bin is carried in different time sections feed bin group 10, can further improve the computational accuracy of material total mass by following the tracks of the transmission of material on the amalgamation belt 11.
The compound of mixing container 17 outputs all is laid on the sintering pallet 19, and the mixture volume that calculates mixing container 17 outputs can adopt following dual mode:
First kind, at the compound delivery port of mixing container 17 flow detection equipment is set, detect the fluctuations in discharge of mixing container 17, adopt formula 6 or formula 7 to calculate the mixture volume of output again.
Second kind, speed detection equipment and material thickness test set are set on sintering pallet 19, detect the travelling speed of sintering pallet 19 and the material thickness of laying, utilize following formula to calculate again:
Vout=∫ ∫ ∫ sp_Widthdsp_speedd (ch-ch0) dt formula 9
In the formula 9, Vout is the volume of mixing container 17 output compounds, and sp_width is the width of sintering pallet 19, and sp_speed is the running speed of sintering pallet 19, CH is the bed thickness of compound on the sintering pallet 19, and CH0 is the thickness of grate-layer material on the sintering pallet 19.By variable sp_speed, (CH-CH0) and time are carried out integration 3 times, multiplication by constants sp_width again, and minute being that step-length is carried out integral and calculating, the detection error that speed detection equipment and material thickness test set precision problem cause can be eliminated like this, the mixture volume of accumulative total output in this section period can be more accurately calculated.
In some material transportation, because of the various material's proportion of importing in the different time sections change greatly, various materials may cause the loss of material to differ because of the work of whole haulage system is inharmonious in course of conveying, the mixture density that the adjacent time period is calculated has than great fluctuation process, is unfavorable for the calculating of follow-up sintering flow.Select time length of the present invention has two periods than big difference, calculate the mixture density value of these two sections time correspondences respectively, two mixture density values multiply by addition behind the weighting coefficient more respectively, that obtain and be updated to mixture density, have than great fluctuation process with the mixture density of avoiding different time sections to calculate, concrete formula is:
Desinity=D1*PB1+D2*PB2 formula 10
In the formula 10, D1 is first computation period, and the D1 span can be 30-120 minute; D2 is second computation period, and the D1 span can be 5-15 minute, and PB1 and PB2 are the weighting coefficient less than 1, and the concrete value of PB1 and PB2 can be adjusted according to calculation result.Preferably, PB1+PB2=1, like this, formula 10 deformables are:
Desinity=D1*PB1+D2* (1-PB1) formula 11
The present invention calculates the mixture density of longer for some time correspondence and the mixture density of shorter for some time correspondence, multiply by respectively again addition behind the weighting coefficient and be updated to mixture density, this account form is taken all factors into consideration the changing conditions of various materials in longer for some time and the changing conditions of interior various materials of shorter for some time, simultaneously, value size by weighting coefficient values is controlled the influence degree of two kinds of different situations to mixture density, makes the mixture density that obtains at last can objectively respond current mixture density.
Real-time for the mixture density value that guarantees to obtain at last, the present invention sets the replacement cycle, the all interior mixture density value of upgrading of per replacement cycle, it is 60 minutes now with first computation period, second computation period is 10 minutes, replacement cycle be 1 minute for example, introduce this renewal process, concrete steps are referring to Fig. 5.
Whether step S501, judgement time reach 1 minute at interval, as reach 1 minute, forward step S402 to, as not reaching 1 minute, continue to wait for.
Step S502, the total mass and the mixture volume of each material that utilized detect in nearest 60 minutes calculate mixture density D1, and the total mass and the mixture volume of each material that utilized detect in nearest 10 minutes calculate mixture density D2.
Step S503, utilize formula desinity=D1*PB1+D2* (1-PB1), calculate current mixture density value.
The present invention is at each replacement cycle every renewal mixed once material density value, the mixture density that at every turn obtains all has and does not have too big fluctuation, promptly guarantee the real-time of the mixture density of acquisition, can objectively respond the changing conditions of mixture density again, make things convenient for and use this mixture density value in the subsequent calculations.
Based on the detection method of above-mentioned mixture density, the present invention also discloses a kind of Controlling System of compound bed thickness.Introduce three embodiment of this detection system below respectively by Fig. 6, Fig. 7, Fig. 8.Fig. 6 illustrates compound layer thickness control first embodiment of system of the present invention, comprises round roller speed acquiring unit 51, circle roller output coefficient acquiring unit 52, compound agglomerating speed acquiring unit 53, sintering pallet width acquisition unit 54, mixture density acquiring unit 55, current compound bed thickness computing unit 56, reaches compound bed thickness adjustment unit 57.
Circle roller speed acquiring unit 51, circle roller output coefficient acquiring unit 52, compound agglomerating speed acquiring unit 53, sintering pallet width acquisition unit 54, mixture density acquiring unit 55 are respectively applied for and obtain mixing container output flow, compound agglomerating speed, sintering pallet width and mixture density.
Current compound bed thickness computing unit 56 multiplies each other described round roller speed and circle roller output coefficient, and the product that obtains is long-pending divided by compound agglomerating speed, sintering pallet width and mixture density three again, and the merchant who obtains is as current compound bed thickness.
Compound bed thickness adjustment unit 57 is regulated the ratio of circle roller speed and compound agglomerating speed, makes current compound bed thickness near setting bed thickness.
Fig. 7 illustrates an embodiment synoptic diagram of mixture density acquiring unit 55, and mixture density acquiring unit 55 comprises that the total mass of various materials obtains the volume of subelement 551, compound and obtain subelement 552, and mixture density computation subunit 553.
The total mass of various materials is obtained the total mass of the various materials of feed bin group output in the subelement 551 statistics very first time length.The volume of compound obtains the course of conveying that subelement 552 is followed the tracks of described various materials, when described various mass transport arrive mixing container, begins to detect the volume of the compound of described mixing container output in the described very first time length.Divided by mixture volume, the merchant who obtains is as mixture density with various material total masses for mixture density computation subunit 553.
Fig. 8 illustrates an embodiment synoptic diagram of round roller output coefficient acquiring unit 52, and circle roller output coefficient acquiring unit 52 comprises that the mixing container work output obtains subelement 521, compound output speed computation subunit 522, and circle roller output coefficient computation subunit 523.
The mixing container work output is obtained mixing container accumulative total input in subelement 521 statistics second time span, adds mixing container material level accumulative total variable quantity in second time span, obtains the mixing container work output.
522 pairs of described round roller rate integratings of compound output speed computation subunit obtain the compound output speed.Circle roller output coefficient computation subunit 523 divided by the compound output speed, obtains circle roller output coefficient with the mixing container work output.
Certainly, the present invention is not only applicable to the compound layer thickness control in steel sintering field, also be applicable to the compound layer thickness control that mixes by multiple raw materials for production in other Industrial processes, for example, the layer thickness control of cement admixture in the cement production process, the bed thickness control of compound etc. of fermenting in the antibiotics medicine production process.
More than to the control method and the Controlling System of a kind of compound bed thickness provided by the present invention, be described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. the control method of a compound bed thickness is characterized in that, comprising:
Obtain round roller speed, circle roller output coefficient, compound agglomerating speed, sintering pallet width and mixture density;
The concrete steps of obtaining described round roller output coefficient are:
Add up mixing container accumulative total input in second time span, add mixing container material level accumulative total variable quantity in second time span, obtain and divided by the integrated value of described round roller speed, the merchant who obtains is circle roller output coefficient;
The step of obtaining described mixture density is specially:
The total mass of the various materials of feed bin group output in the statistics very first time length;
Follow the tracks of the course of conveying of described various materials,, begin to detect the volume of the compound of described mixing container output in the described very first time length when described various mass transport arrive mixing container;
Divided by mixture volume, the merchant who obtains is as mixture density with various material total masses;
Described round roller speed and circle roller output coefficient are multiplied each other, and the product that obtains is long-pending divided by compound agglomerating speed, sintering pallet width and mixture density three again, and the merchant who obtains is as current compound bed thickness;
Regulate the ratio of described round roller speed and described compound agglomerating speed, make current compound bed thickness near setting bed thickness.
2. the method for claim 1, it is characterized in that, in various material conveying process, if any new material input, the quality of new material is imported in detection in very first time length, with the total mass of described various materials and the quality addition of described new material, the total mass that obtains and be updated to various materials.
3. the method for claim 1 is characterized in that, the volume of the compound of described mixing container output also comprises simultaneously in detecting described very first time length:
The material level variable quantity of detection described mixing container in described very first time length;
With the total mass and the addition of described material level variable quantity of described various materials, the total mass that obtains and be updated to various materials.
4. the method for claim 1, it is characterized in that, respectively travelling speed variable, compound thickness variable and the time of sintering pallet are carried out integration 3 times, obtain the integral result in the described very first time length, integral result be multiply by the sintering pallet width, the numerical value that obtains is as the volume of compound again.
5. as each described method of claim 1 to 4, it is characterized in that, also comprise:
If described very first time length is first computation period, the mixture density that calculates is as first mixture density; If described second time span is second computation period, the mixture density that calculates is as second mixture density;
First, second mixture density be multiply by first, second weighting coefficient respectively, again with the product addition, obtain and be updated to mixture density.
6. the Controlling System of a compound bed thickness, it is characterized in that, comprise round roller speed acquiring unit, circle roller output coefficient acquiring unit, compound agglomerating speed acquiring unit, sintering pallet width acquisition unit, mixture density acquiring unit, current compound bed thickness computing unit, reach compound bed thickness adjustment unit;
Described round roller speed acquiring unit, circle roller output coefficient acquiring unit, compound agglomerating speed acquiring unit, sintering pallet width acquisition unit and mixture density acquiring unit are respectively applied for and obtain round roller speed, circle roller output coefficient, compound agglomerating speed, sintering pallet width and mixture density;
Described current compound bed thickness computing unit, be used for described round roller speed and circle roller output coefficient are multiplied each other, the product that obtains is long-pending divided by compound agglomerating speed, sintering pallet width and mixture density three again, and the merchant who obtains is as current compound bed thickness;
Described compound bed thickness adjustment unit is used to regulate the ratio of described round roller speed and described compound agglomerating speed, makes current compound bed thickness near setting bed thickness;
Described round roller output coefficient acquiring unit comprises that the mixing container work output obtains subelement, compound output speed computation subunit, and circle roller output coefficient computation subunit;
Described mixing container work output is obtained subelement, is used to add up mixing container accumulative total input in second time span, adds mixing container material level accumulative total variable quantity in second time span, obtains the mixing container work output;
Described compound output speed computation subunit is used for described round roller rate integrating is obtained the compound output speed;
Described round roller output coefficient computation subunit is used for the mixing container work output divided by the compound output speed, obtains circle roller output coefficient;
Described mixture density acquiring unit comprises that specifically the total mass of various materials obtains the volume of subelement, compound and obtain subelement, and mixture density computation subunit;
The total mass of described various materials is obtained subelement, is used to add up the total mass of the various materials of feed bin group output in the very first time length;
The volume of described compound obtains subelement, is used to follow the tracks of the course of conveying of described various materials, when described various mass transport arrive mixing container, begins to detect the volume of the compound of described mixing container output in the described very first time length;
Described mixture density computation subunit is used for various material total masses divided by mixture volume, and the merchant who obtains is as mixture density.
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| CN103045855B (en) * | 2012-12-27 | 2014-04-23 | 中冶长天国际工程有限责任公司 | Method and system for predicting thickness of sintered ore bed |
| CN104316129B (en) * | 2014-10-15 | 2017-08-25 | 中冶长天国际工程有限责任公司 | A kind of hearth layer for sintering consumption and thickness flexible measurement method and device |
| CN108120288A (en) * | 2017-11-28 | 2018-06-05 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Pass through the method for belt conveyer scale adjusting control sintering machine speed |
| CN111398119B (en) * | 2020-03-24 | 2022-08-16 | 中冶长天国际工程有限责任公司 | Air permeability detection robot system and sintering process control method and system |
| CN113295000B (en) * | 2020-08-20 | 2022-04-12 | 中冶长天国际工程有限责任公司 | Material distribution control system and method based on material layer thickness prediction |
| CN112577318A (en) * | 2020-12-02 | 2021-03-30 | 湖南中冶长天重工科技有限公司 | Sintering machine material layer thickness control method and device and sintering machine |
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| CN101184855A (en) * | 2005-05-10 | 2008-05-21 | 新日本制铁株式会社 | Method for pretreatment of raw materials for sintering |
| CN101339115A (en) * | 2008-08-20 | 2009-01-07 | 中冶长天国际工程有限责任公司 | Mixture density checking method and system |
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| US5847273A (en) * | 1996-10-22 | 1998-12-08 | Albert Zubragel Maschinenbau Gmbh | Method and device for determining the delivered volume of a batch or lot of bulk material |
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