CN101349632A - Method for testing sintered mixture ventilation property, sintering control method and sintering machine - Google Patents
Method for testing sintered mixture ventilation property, sintering control method and sintering machine Download PDFInfo
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- CN101349632A CN101349632A CNA2008102105464A CN200810210546A CN101349632A CN 101349632 A CN101349632 A CN 101349632A CN A2008102105464 A CNA2008102105464 A CN A2008102105464A CN 200810210546 A CN200810210546 A CN 200810210546A CN 101349632 A CN101349632 A CN 101349632A
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Abstract
The invention provides a method for detecting the air permeability of sinter mixture, which comprises arranging a closed device with gas space which coats a band carrier of a sintering machine in the closed device between a maintaining furnace and a mixed ore groove of the sintering machine, arranging an exhaust blower for discharging gas on the lower portion of the closed device, and arranging a gas detecting device in the exhaust blower, when in detecting, inputting gas into the gas space of the closed device, detecting the parameter of gas which gets into the exhaust blower through mixture on the band carrier of the sintering machine by the gas detecting device, and getting the quantized value of the air permeability of the mixture according to the gas parameter. The invention also provides a sintering machine control method and a sintering machine. The method for detecting the air permeability of mixture can be used to get mixture air permeability with high precision and little detection value, and the sintering machine control method and the sintering machine can get higher control precession and more effective dosage mixed operation and sintering operation of the sintering machine.
Description
Technical field
The present invention relates to a kind of gas detection method, sintering control method and sintering machine.
Background technology
Sintering process is the important step in the smelting technique, and the powdery mixed material (hereinafter referred compound) that is used for being difficult for smelting is sintered to the sintering deposit that is easy to smelt.The graininess degree of compound, the size of particle diameter for example has direct influence to the gas penetration potential of compound.Usually, gas penetration potential is meant the complexity that the solid granule layer allows gas to pass through, and also is the sign of weighing compound hole rate, therefore, can reflect the graininess degree of compound with mixture ventilation.The gas penetration potential of compound has a significant impact the quality of sintering deposit, so mixture ventilation is the important indicator in the sintering process, can be used for sintering process control, and this is to improving sinter quality, and reducing sintering energy consumption etc. has important effect.Usually, mixture ventilation is meant under certain pressure condition, and gas penetration potential is represented by the gas flow of the sinter bed by unit area and certain altitude in the unit interval.
Fig. 1 is the sintering system synoptic diagram.Iron Ore Powder and auxiliary material are admitted to mixer 112 from batching ore deposit groove 111 through batching travelling belt 123 and add the water mixing.Add the mixed compound of water and send into mix mine groove 114 through compound travelling belt 113 again.The bed material of grate-layer material ore deposit groove 115 elder generation lay is to sintering machine travelling belt 118, and the compound that flows out from mix mine groove 114 covers on the good bed material of described lay and bed material is admitted to ignition furnace 116 together and carries out high temperature sintering.Then, flowing to central cooler 122 by holding furnace 117 through tail fairing 121 lowers the temperature.Wherein the flue dust that produces in sintering process of the compound method that adopts the negative pressure exhausting is discharged in the atmosphere through flue dust bellows 119 and large flue 120 and dust arrester 124.
Traditionally, because compound need be through the mix mine groove lay to mixer travelling belt 118, so mixture ventilation can represent with the mixture ventilation in the mix mine groove, so the detection of mixture ventilation can be finished in mix mine groove.In fact; mixture ventilation can also detect in ignition furnace; but the temperature of ignition furnace is higher, site environment is abominable; extremely easy breakage detection device; in order to protect checkout equipment, those skilled in the art think that the gas penetration potential that detects compound in mix mine groove is best and unique mode both at home and abroad at present.
Fig. 2 is the method synoptic diagram that detects mixture ventilation at present in mix mine groove 114.Among Fig. 2, the source of the gas that is used for the gas penetration potential detection is sprayed by the shower nozzle with holes 214 that inserts mix mine groove 215 through gas flows detection valves 212 and gas control valve 213 from tracheae 211.Wherein, the gas of shower nozzle 214 ejections with holes is detected by the detecting device that sets in advance in tracheae through compound, and then can be by calculating the gas penetration potential of compound.
Among Fig. 2, PT is the gaseous tension detector, is used to detect the gaseous tension of tracheae 211, and it obtains by the detection that is installed in differential pressure gauge on the tracheae 211.FT is the gas flow detector of tracheae 211, can adopt flowmeters such as orifice plate or V-type awl to detect; PIC is the pressure governor of tracheae 211, guarantees the constant pressure of tracheae 211 by the gas control valve 213 on the adjusting tracheae 211.UR is the multivariate processing unit, and by the input of detection signal PT, FT, conversion process obtains the gas penetration potential of compound in the mix mine groove as calculated.
But, because the compound in the mix mine groove flows, adopt method shown in Figure 2 can cause the wearing and tearing of pick-up unit, serviceable life is short; In addition,, must guarantee that also the compound that flows in the compound at shower nozzle with holes place and the mix mine groove is synchronous for the accuracy that guarantees to detect, i.e. flowing velocity unanimity, otherwise can cause the situation of dead material; And, after flowing out from mix mine groove 114, compound needs to be arranged on the sintering machine travelling belt 118 through the cloth link, also must pass through scraper and binder link, so also can change the gas penetration potential of compound on the sintering machine travelling belt 118, above-mentioned labile factor can make the mixture ventilation that detection obtains in the mix mine groove 114 have than mistake, and then influences the control of sintering process.
Summary of the invention
The problem to be solved in the present invention is, provides a kind of and detects the less sintered mixture ventilation detection method of error and utilize this method sintering machine to be implemented sintering machine control method and a kind of sintering machine of control.
The sintered mixture ventilation detection method that the embodiment of the invention provides comprises:
Between the holding furnace of sintering machine and mix mine groove, be provided with the sintering machine travelling belt is contained in wherein the locking device with gas space, be provided for the exhaust blower of emission gases in described locking device bottom;
Gas-detecting device is arranged in the described exhaust blower;
Gas is imported in the gas space in the described locking device;
Described gas-detecting device detects the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter.
The sintering machine control method that the embodiment of the invention provides based on the sintered mixture ventilation detection method that previous embodiment provides, is used to control the batch mixes operation of mixer, comprising:
Be provided with between the holding furnace of sintering machine and mix mine groove the sintering machine travelling belt is contained in wherein the locking device with gas space, described locking device bottom is useful on the exhaust blower of emission gases;
Gas-detecting device is arranged in the middle of the exhaust blower;
Gas is imported in the gas space in the described locking device;
Described gas-detecting device detects the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter;
Control the batch mixes operation of compounding system according to described mixture ventilation quantized value.
The another kind of sintering machine control method that the embodiment of the invention provides based on the sintered mixture ventilation detection method that previous embodiment provides, is used to control the sintering operation of sintering machine.
The embodiment of the invention provides sintering machine, comprises mix mine groove, ignition furnace, holding furnace and sintering machine travelling belt, also comprises:
Be arranged between holding furnace and the mix mine groove, the sintering machine travelling belt is contained in wherein the locking device with gas space;
Be arranged on exhaust blower described locking device bottom, that be used to detect air quantity;
Gas is input to the gas input device of the gas space in the described locking device, and,
Be arranged on the gas-detecting device in the described exhaust blower, described gas-detecting device is used for detecting the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter.
By the prior art scheme as can be known, even in mix mine groove, do not detect the gas penetration potential of compound, and in batching, mixing portion detects also is irrational, because the gas penetration potential of compound may have no practical significance also in continuous variation even detected also on this part flow process.If detecting the gas penetration potential of compound on holding furnace and later flow process also is difficult to finish, this moment, compound was divided into a plurality of layers, as sintering ore bed, burning zone, preliminary heating zone, drying layer, excessive moistening layer etc., the gas penetration potential of each layer is inconsistent, and gas penetration potential instability, variation are greatly, from application point of view, detected gas penetration potential is also nonsensical.And employing embodiment of the invention scheme, between the holding furnace of sintering machine and mix mine groove, be provided with the sintering machine travelling belt is contained in wherein the locking device with gas space, and be provided for the exhaust blower of emission gases in described locking device bottom, gas-detecting device is arranged in the described exhaust blower, at this moment, compound is sintering not as yet, and its physics, chemical property and state are the most stable, have for example avoided the influence of cloth process to gas penetration potential.Carry gases at high pressure by the gas space to locking device, this gas is pressed towards the compound on the sintering machine travelling belt, and the space that sees through compound is discharged in the exhaust blower of locking device bottom.By the pick-up unit in the exhaust blower of described locking device bottom, detect the gas parameter that sees through compound, just can obtain the precision height, detect the little mixture ventilation of error.Also can be by extracting the mode of gas in the described exhaust space, carry gas under normal temperature, the normal pressure by the negative pressure that forms to the gas space of locking device, so also the exhaust blower that is used for emission gases that can be provided with in described locking device bottom detects the gas parameter that sees through compound, obtains the precision height, detects the little mixture ventilation of error.
Equally, according to the sintered mixture ventilation detection method that the embodiment of the invention provides, the sintering machine that uses the embodiment of the invention to provide can be higher, more effective to the control accuracy of batch mixes operation and sintering machine sintering operation.
Other advantage of the present invention has detailed narration in follow-up literal.
Description of drawings
Fig. 1 is the sintering system synoptic diagram;
Fig. 2 is the method synoptic diagram that detects mixture ventilation at present in mix mine groove;
Fig. 3-the 1st, the sintering machine first embodiment synoptic diagram of the present invention;
Fig. 3-the 2nd, the described embodiment partial schematic diagram of Fig. 3-1;
Fig. 4 is the sintering machine second embodiment synoptic diagram of the present invention;
Fig. 5 is that mixture ventilation detection method first embodiment of the present invention detects flow chart of steps for first kind;
Fig. 6 is another implementing procedure figure of the mixture ventilation detection method first embodiment step 2 of the present invention;
Fig. 7 is that the described embodiment of Fig. 6 step 2 detects schematic diagram;
Fig. 8 is that compound thickness detects schematic diagram.
Embodiment
By above explanation as can be known, the present invention detects compound material gas penetration potential and is arranged on mix mine groove to being more rational between the holding furnace.With reference to the accompanying drawings embodiments of the invention are elaborated.
Fig. 3-the 1st, the sintering machine first embodiment synoptic diagram of the present invention, the content of the dotted portion among Fig. 3-1 is with reference to figure 3-2.Sintering machine shown in Fig. 3-1, comprise mix mine groove 114, ignition furnace 116, holding furnace 117 and sintering machine travelling belt 118, be arranged on the locking device with gas space 311 between holding furnace 117 and the mix mine groove 114, described locking device 311 is contained in the part of sintering machine travelling belt 118 through oneself wherein, form the space of relative closure, this space part is occupied by certain thickness compound 312, a part forms a gas space 314, a gas input device 313 that is used for gas is input to from locking device 311 outsides described locking device 311 gas spaces 314 is set up described locking device 311, makes the gas of locking device 311 outsides can be input in the described locking device 311 in the gas space 314.
By sintering machine travelling belt 118 isolated spaces, promptly described locking device 311 is provided with the exhaust blower 315 that is used to detect air quantity with respect to the opposite side of sintering machine travelling belt 118 in described locking device 311 bottoms.The riding position of exhaust blower 315 preferably is provided with described locking device 311 couplings, makes in the locking device 311 gas see through compound 312 to greatest extent and be discharged in the exhaust blower 315, leaks out with minimizing, improves the accuracy of detection of mixture ventilation.Therefore, a gas-detecting device 316 is set in the described exhaust blower 315, is used for detecting the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter.
In the present embodiment, the shape and size of described locking device 311 and exhaust blower 315 are not required, the detection that only can satisfy mixture ventilation gets final product.Described locking device 311 can be arranged on mix mine groove 114 on the sintering machine travelling belt 118 the position of the intact material of cloth to the optional position between the holding furnace 117.Because ignition furnace 116 and holding furnace 117 next-door neighbours in this example, make described locking device 311 be arranged on mix mine groove 114 on the sintering machine travelling belt 118 the position of the intact material of cloth to next-door neighbour's ignition furnace 116 between the ignition furnace 116, and in other sintering machine embodiment of the present invention, described locking device 311 needn't be close to ignition furnace 116, also can be arranged between ignition furnace 116 and the holding furnace 117.Certainly, exhaust blower 315 all will be provided with described locking device 311 couplings as far as possible in any case.
A large amount of practices through the present patent application people, the flue dust bellows 119 that proof is utilized ignition furnace 116 and is arranged on its underpart also can be finished task of the present invention preferably, thereby have overcome the prejudice that the detection of the mixture ventilation of present existence can only be finished in described mix mine groove 114.Therefore, in sintering machine second embodiment of the present invention, with reference to figure 4, described locking device 311 adopts the ignition furnace 116 of sintering machine, described exhaust blower 315 adopts the flue dust bellows 119 below the ignition furnace, gas input device 313 is arranged on the ignition furnace 116, and gas-detecting device 316 is arranged in the flue dust bellows 119.
In Fig. 3-2 and the described embodiment of Fig. 4, finish the detection of mixture ventilation by the mode of carrying gases at high pressure to described locking device 311 or ignition furnace 116 or having the gas of certain pressure.But, carry gas if adopt the mode of negative pressure exhausting to described locking device 311 or ignition furnace 116, just can utilize the characteristics of the relative closure of locking device 311 or ignition furnace 116, the slit that promptly utilizes locking device 311 or ignition furnace 116 to leak gas realizes carrying the task of gas to described locking device 311 or ignition furnace 116, thereby finishes the detection of mixture ventilation.Therefore, in the present invention the 3rd, the 4th embodiment, gas input device 313 is not set based on Fig. 3-1 and the described sintering machine of Fig. 4.Certainly, for based on Fig. 3-2 and described first, second embodiment of Fig. 4, also can carry gases to locking device 311 or ignition furnace 116, adopt the mode of negative pressure exhausting to realize detection simultaneously mixture ventilation in conjunction with preceding two kinds of situations.
Adopt the mode of negative pressure exhausting to realize detection for convenience to mixture ventilation, in the first and the 3rd embodiment of above-mentioned sintering machine, described exhaust blower 315 also is provided with exhaust outlet, discharge smoothly and be convenient to mixture ventilation and detect so that enter into the gas of exhaust blower 315, especially adopt negative pressure mode detected gas parameter, correspondingly like this constituted the of the present invention the 5th and the 6th embodiment.Wherein the 5th embodiment is with reference to figure 3-1.And for the second and the 4th embodiment of above-mentioned sintering machine, described exhaust outlet directly adopts the suction opeing of described flue dust bellows.
In addition, in above-mentioned sintering machine embodiment,, and related description is arranged also hereinafter, do not repeat them here in view of gas-detecting device 316 adopts known detecting instrument or device.
Sintered mixture ventilation detection method first embodiment of the present invention comprises two key steps, and a step is a pre-treatment step, is used to be provided with necessary pick-up unit; Another step is to detect step, is used to finish the detection of mixture ventilation.Wherein, step 1 is to be provided with the sintering machine travelling belt is contained in wherein the locking device with gas space between the holding furnace of sintering machine and mix mine groove, be provided for the exhaust blower of emission gases in described locking device bottom, and gas-detecting device is arranged in the described exhaust blower.As seen, the operating result of step 1 has promptly constituted the 3rd embodiment of aforementioned sintering machine of the present invention based on Fig. 3-1.If described locking device adopts the ignition furnace of sintering machine, described exhaust blower adopts the flue dust bellows below the ignition furnace, has promptly constituted the 4th embodiment of aforementioned sintering machine of the present invention based on Fig. 4.
Because the 3rd embodiment of described sintering machine is fit to adopt the mode of negative pressure exhausting to carry gas in described locking device 311, therefore, in second embodiment of sintered mixture ventilation detection method of the present invention, the operating result of step 1 has constituted first embodiment of aforementioned sintering machine of the present invention based on Fig. 3-1.That is, step 1 also comprises a pre-service substep, on described locking device gas input device is set, and is used for gas is input to the described locking device gas space.Obviously, first embodiment of the described sintering machine mode (malleation mode) that to be an employing carry gases at high pressure or have the gas of certain pressure to described locking device 311 or ignition furnace 116 is finished the detection of mixture ventilation.
The operation that the described detection step of step 2 relates to is, gas is imported in the gas space in the described locking device; Described gas-detecting device detects the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter.The described mixture ventilation quantized value of this step promptly is a mixture ventilation as herein described, uses known method can realize this step.
At first need explanation, difference according to sintering machine, the mode of described in the step 2 gas being imported in the gas space in the locking device can have three kinds, first kind is the mode of utilizing gas input device 313 to supply gas, second kind is the mode from exhaust blower 315 exhausting, and the third is the combination of above-mentioned dual mode.Be the testing process that example is discussed step 2 with specific implementation below based on the 3rd embodiment of described sintering machine.
With reference to figure 5.Shown in Figure 5 is adopts three step detected gas parameters and obtains the flow process of mixture ventilation quantized value Pe, and described Pe refers to the gas flow that passes through on unit area under the unit pressure gradient, thereby it is a kind of index of expression mixture ventilation.
Wherein, step 501 is extracted the gas in the described exhaust blower out, promptly begins the exhausting process with negative pressure mode; Beginning step 502 in the process of gas in extracting described exhaust blower out, the parameter that detection computations mixture ventilation quantized value Pe needs.
Wherein, substep 2) described detection or definite implication are, the exhausting area of the gaseous tension of the gas space, exhaust blower and compound layer height can obtain by the instant detection of detecting device in the described locking device, but above-mentioned parameter also can be known in advance, in this case, substep 2) above-mentioned parameter that only need will store in advance takes out use from storer, or be cured in advance in the hardware of pick-up unit, promptly determine the gaseous tension of the gas space in the described locking device, the exhausting area and the compound layer height of exhaust blower.
Flow process shown in Figure 5 statement be at certain compound layer height, and under the constant situation of exhausting amount, mixture ventilation can be with gas during by the bed of material loss in head represent.Loss in head is higher, and then bed permeability is poorer, and vice versa.This testing process is widely used in the design of sintering machine and the analysis of sintering production process at present, and advantage is that calculating is easy, reflects the mutual relationship of the main technologic parameters in the sintering process basically.Need explanation, adopt this method, the value of n changes, wherein:
1. the compound granularity is to the influence of n.
Granularity 10-0mm, n=0.55; 6-0mm, n=0.60; 3-0mm, n=0.95.The n value changes with change of granularity, so the thin concentrate of sintering is different with sintering rich ore powder n value.
2. the variation of n value in the sintering process.
N=0.60 before the igniting; Ignition point n=0.65; Average n=0.60 during sintering; N=0.55 behind the sintering.
The mixture ventilation quantized value also has other expression and account form, in other embodiment of the method for the invention, according to following step detected gas parameter and obtain mixture ventilation quantized value G, what this invention was explained is, under certain pressure reduction (vacuum tightness) condition, mixture ventilation can be with representing by the gas flow of unit area and certain bed depth in the unit interval.
Step 501 is extracted the gas in the described exhaust blower out, in the process of the gas in extracting described exhaust blower out, and beginning step 502.The substep of two sequence independences that step 502 comprises: the 1) gas flow in the described exhaust blower of detection under the mark condition; 2) time span of the exhausting area of detection or definite described exhaust blower and detection cost.Step 503 is calculated G, G=Q/ in this example (tF);
Wherein, G is mixture ventilation m3/m2min; Q is the gas flow m3 under the mark condition; The time span min of t for detecting; F is the area m2 of locking device, i.e. exhausting area.
Obviously, when exhausting area and bed depth one regularly, the air capacity by the bed of material in the unit interval is bigger, the gas penetration potential that then shows compound better.
Need to prove, if the mixture ventilation quantized value adopts mixture ventilation G to express, need learn the gas flow Q under the mark condition, and suitable difficulty is arranged in the accurate detection reality of this parameter, if adopt mixture ventilation indices P e to express, can reduce the difficulty that detects greatly, therefore have more practice significance.
Because the factor that influences mixture ventilation is more, as: raw material, fuel, flux, the granularity of returning mine etc. with and proportioning, mixture moisture rate, compound balling ratio, cloth link etc.In addition, the variation mixture ventilation along with sintering process also can change.For this reason, the present invention also provides a kind of ignition furnace and flue dust bellows of utilizing to carry out the embodiment that compound detects, and this embodiment has more Practical significance.Therefore, be that example is discussed step 2 with specific implementation below based on the 4th embodiment of described sintering machine.
Wherein, the step 501 that step 2 comprises is extracted the gas in the described exhaust blower out, promptly begins the exhausting process with negative pressure mode; Beginning step 502 in the process of the gas in extracting described exhaust blower out, the parameter that detection computations mixture ventilation quantized value Pe needs.
The substep of three sequence independences of step 502 is with reference to figure 6:601) detect the gaseous tension in the described flue dust bellows; 602) gaseous tension in detection or the definite described ignition furnace, the exhausting area and the compound layer height of flue dust bellows; 603) detect in the flue dust bellows by mixing the air quantity of the bed of material.
Step 503 is calculated Pe, Pe=Q/F in this example (h/ Δ p) n; Wherein, Pe is the mixture ventilation index; Q is for seeing through the air quantity m3/min of compound gas in the ignition furnace; F is the area of ignition furnace, i.e. exhausting area m2; H is compound layer height m; Δ p is negative pressure Pa, the gas pressure difference in gaseous tension in the promptly described ignition furnace and the described dust bellows; N is the compound index.
Need to prove that the gas in the described extraction exhaust blower of step 501 also can adopt alternate manner, for example the mode of the mode of malleation or malleation, negative pressure combination.
The parameter detecting of described step 502,503 designs is with reference to figure 7.Among Fig. 7, LT is a compound layer thickness detection signal on the sintering pallet.Contactless ultrasound wave, the radar level-sensing device of the general employing of detection method also can adopt position, the angle instrument of contact to detect.Generally have 3 to 5 meters because chassis is the width of sintering machine travelling belt, this example generally adopts multiple spot to detect when design compound bed thickness check point, gets its mean value as that instantaneous bed thickness value constantly.PT1 is that ignition furnace burner hearth elementary errors is pressed, and scope is :-100Pa generally adopts elementary errors pressure pressure table to detect to 100Pa, and pressure end one is brought in the spontaneous ignition burner hearth, and the other end leads to atmosphere.PT2 is the mean value of bellows pressure under the ignition furnace, can all detection signals be averaged obtain the PT2 value again by the pressure detection instrument is set separately on each bellows under ignition furnace; Also can balance pipe be installed by each bellows under ignition furnace, unified again introducing pressure detection instrument is obtained PT2.FQ is for seeing through the total gas flow rate of material in the igniting, can obtain by the gas flow summation of all bellows under the check point stove, another soft detection technique that also can adopt the applicant to provide realizes, other a slice patented claim " a kind of detection method of ignition furnace discharge gas flow quantity and detection system " of concrete REFERENCE TO RELATED people.
Among Fig. 7, FQ sees through the total gas flow rate of material in the igniting as Q; The difference of 1#, 2#, 3# bellows pressure mean values PT2 and furnace pressure PT1 can be used as Δ p; Compound thickness LT is processed into LT ' through the time-delay moving average and can be used as h; The area A of ignition furnace can be used as F.
In this example, the disposal route of LT ' is as follows: according to detected compound thickness LT process variable, with the formation form record of delaying time.Detect the LT value at every turn and insert the formation head, again from value of rear of queue deletion.Then, statistics calculates its mean value and uses as LT ' from enter the mouth LT value (promptly from LTk-LTk+m) the formation of ignition furnace exit position of ignition furnace.With reference to figure 8.
The embodiment of described sintered mixture ventilation detection method provided by the invention, equipment, can guarantee gas penetration potential lastness, the stability of compound, no longer because extraneous factor causes the change of its characteristic, the gas penetration potential that also can reflect final compound better, like this, the just control that can utilize detected mixture ventilation to remove feedback regulation batching, mixing portion is for example adjusted batching, changes the mixture moisture rate, is strengthened mixture granulation etc., to improve the gas penetration potential of compound; And utilize detected mixture ventilation to adjust sintering velocity, make sintering effect the best, end product quality is best, intensity meets the demands etc.
Therefore, sintering machine control method first embodiment provided by the invention, based on above-mentioned mixture ventilation detection method, between the holding furnace of sintering machine and mix mine groove, be provided with earlier the sintering machine travelling belt is contained in wherein the locking device with gas space, be provided for the exhaust blower of emission gases in described locking device bottom through pre-treatment step; Gas-detecting device is arranged in the middle of the exhaust blower again; Then carry out mixture ventilation and detect step, this step is imported gas earlier in the gas space in the described locking device; Then, described gas-detecting device detects the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter; Control the batch mixes operation of compounding system at last according to described mixture ventilation quantized value.
No matter the mixture ventilation quantized value adopts gas penetration potential, still adopts permeability index to express, as long as it is lower than setting threshold, and continues for some time, and some factor deficiency of compound is described, influences its gas penetration potential.For example, water deficient.Be to improve the gas penetration potential of compound, present embodiment control commingled system once add water and/or secondary adds wetting system, adjust once to add the amount of water that water and/or secondary add wetting system, thereby improve the gas penetration potential of compound.
In this example, if the mixture ventilation quantized value is lower than setting threshold and continues for some time, the proportioning of various compositions does not meet manufacturing technique requirent in the possibility compound yet, influences its gas penetration potential.Therefore, be to improve the gas penetration potential of compound, present embodiment also can be separately or the proportioning of the various materials that control batching ore deposit groove 111 is carried when adding water management, makes the proportioning of material meet manufacturing technique requirent, the raising mixture ventilation.
Sintering machine control method second embodiment provided by the invention is after obtaining the mixture ventilation quantized value, according to the sintering operation of described mixture ventilation quantized value control sintering machine.
If the mixture ventilation quantized value is lower than setting threshold, just show that the mixture ventilation of sintering is relatively poor in ignition furnace.Because the mixture ventilation difference directly influences sintering effect, for avoiding the material sintering not meet manufacturing technique requirent, adjust the sintering pallet travelling speed of sintering system in the last step of present embodiment, be the speed of sintering machine travelling belt, the sintering pallet travelling speed is reduced, prolong the sintering time of compound in igniting, make the material sintering meet manufacturing technique requirent.
The various controls of carrying out in view of mixture ventilation have other patented claim discussion of known data and the applicant, do not repeat them here.
Certainly, the technical scope of this invention is not limited to the content on the instructions, also has the concrete technical application scheme of much determining according to its claim.The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, but these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1, a kind of sintered mixture ventilation detection method is characterized in that comprising:
Between the holding furnace of sintering machine and mix mine groove, be provided with the sintering machine travelling belt is contained in wherein the locking device with gas space, be provided for the exhaust blower of emission gases in described locking device bottom;
Gas-detecting device is arranged in the described exhaust blower;
Gas is imported in the gas space in the described locking device; Described gas-detecting device detects the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter.
2, the method for claim 1 is characterized in that also comprising: on described locking device gas input device is set, is used for gas is input to the described locking device gas space.
3, method as claimed in claim 1 or 2 is characterized in that, described gas-detecting device is according to following step detected gas parameter and obtain mixture ventilation quantized value G;
Extract the gas in the described exhaust blower out;
In the process of the gas in extracting described exhaust blower out:
1) gas that detects in the described exhaust blower is marked the condition flow;
2) time span of the exhausting area of detection or definite described exhaust blower and detection cost;
Calculate G, G=Q/ (tF);
Wherein, G is a gas penetration potential; Q is the gas flow under the mark condition; The time span of t for detecting; F is the area of locking device.
4, method as claimed in claim 1 or 2 is characterized in that, described gas-detecting device is according to following step detected gas parameter and obtain mixture ventilation quantized value Pe:
Extract the gas in the described exhaust blower out;
In the process of the gas in extracting described exhaust blower out:
1) gaseous tension in the described exhaust blower of detection;
2) detect or determine the gaseous tension of the gas space in the described locking device, the exhausting area and the compound layer height of exhaust blower;
3) detect in the exhaust blower by mixing the air quantity of the bed of material;
Calculate Pe, Pe=Q/F (h/ Δ p) n;
Wherein, Pe is the permeability index of the bed of material; Q is for seeing through in the locking device by mixing the air quantity of the bed of material; F is the area of locking device; H is the compound layer height; Δ p is the gaseous tension of the gas space in the described locking device and the gas pressure difference in the described exhaust blower; N is the compound index.
5, as method as described in the claim 4, it is characterized in that described locking device is the ignition furnace of sintering machine, described exhaust blower is the flue dust bellows below the ignition furnace.
6, method as claimed in claim 5 is characterized in that, described gas-detecting device is according to following step detected gas parameter and obtain mixture ventilation quantized value Pe:
Extract the gas in the described flue dust bellows out;
In the process of the gas in extracting described flue dust bellows out:
1) gaseous tension in the described flue dust bellows of detection;
2) gaseous tension in detection or the definite described ignition furnace, the exhausting area and the compound layer height of flue dust bellows;
3) detect in the flue dust bellows by mixing the air quantity of the bed of material;
Calculate Pe, Pe=Q/F (h/ Δ p) n;
Wherein, Pe is the permeability index of the bed of material; Q is for seeing through the air quantity of compound gas in the ignition furnace, and Δ p is gaseous tension in the described ignition furnace and the gas pressure difference in the described dust bellows; N is the compound index; H is for mixing the height of the bed of material, and F is the area of ignition furnace.
7, method as claimed in claim 6 is characterized in that, detects the height of the mixing bed of material of a plurality of points in the described ignition furnace, and the mean value of compound layer height that calculates described a plurality of points is as the height h that mixes the bed of material.
8, a kind of sintering machine control method is characterized in that, comprises;
Be provided with between the holding furnace of sintering machine and mix mine groove the sintering machine travelling belt is contained in wherein the locking device with gas space, described locking device bottom is provided with the exhaust blower that is used for emission gases;
Gas-detecting device is arranged in the middle of the exhaust blower;
Gas is imported in the gas space in the described locking device;
Described gas-detecting device detects the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter;
Batch mixes operation according to described mixture ventilation quantized value control mixer.
9, a kind of sintering machine control method is characterized in that, comprises;
Be provided with between the holding furnace of sintering machine and mix mine groove the sintering machine travelling belt is contained in wherein the locking device with gas space, described locking device bottom is provided with the exhaust blower that is used for emission gases;
Gas-detecting device is arranged in the middle of the exhaust blower;
Gas is imported in the gas space in the described locking device;
Described gas-detecting device detects the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter;
Sintering operation according to described mixture ventilation quantized value control sintering machine.
10, a kind of sintering machine comprises mix mine groove, ignition furnace, holding furnace and sintering machine travelling belt, it is characterized in that also comprising;
Be arranged between holding furnace and the mix mine groove, the sintering machine travelling belt is contained in wherein the locking device with gas space;
Be arranged on exhaust blower described locking device bottom, that be used to detect air quantity, and,
Be arranged on the gas-detecting device in the described exhaust blower, described gas-detecting device is used for detecting the gas parameter that enters into described exhaust blower through compound on the sintering machine travelling belt, obtains the mixture ventilation quantized value according to described gas parameter.
11, sintering machine as claimed in claim 10 is characterized in that also comprising: be arranged on the gas input device on the described locking device, be used for gas is input in the described locking device gas space.
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| CNA2008102105464A CN101349632A (en) | 2008-08-27 | 2008-08-27 | Method for testing sintered mixture ventilation property, sintering control method and sintering machine |
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