CN101338364B - Negative-pressure ignition control device for sintering iron ore - Google Patents
Negative-pressure ignition control device for sintering iron ore Download PDFInfo
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- CN101338364B CN101338364B CN2008103042547A CN200810304254A CN101338364B CN 101338364 B CN101338364 B CN 101338364B CN 2008103042547 A CN2008103042547 A CN 2008103042547A CN 200810304254 A CN200810304254 A CN 200810304254A CN 101338364 B CN101338364 B CN 101338364B
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Abstract
The invention discloses a subpressure ignition control device which is hard to loss effect and is used for sintering an iron ore. The device includes an air box body, the vertical tube of the air box connected on the body of the air box as well as a large flue and a by-pass pipe connecting the vertical tube of the air box and the large flue; a clapboard is arranged in an access between the vertical tube of the air box and the by-pass pipe; the clapboard is fixed on the inner wall of the access so as to lead an air flow to pass through from the lower part of the access. A bending tube provided with the clapboard is connected between the air box and the by-pass pipe to lead the air box to have the function of dust removing and lead a bulk to be deposited at the bottom part of the bending tube and to be incapable of entering the by-pass tube, thus avoiding the by-pass tube from plugging; an electric flap the opening of which can be controlled is arranged in the by-pass tube to control the subpressure of the lower surface of an ignition air box; the bottom part of the bending tube is provided with a double-layer ash discharge valve which is convenient for cleaning sediments. The subpressure ignition control device of the invention can flexibly and effectively control the subpressure of the ignition air box and the subpressure of a hearth, maintain the normal running of the sintering process, save the energy consumption for ignition and is applicable for the ignition and sintering of a sintering machine by a v-ti magnetite concentrate ore in particular.
Description
Technical field
The invention belongs to field of metallurgy, be specifically related to a kind of negative-pressure ignition control device that is used for iron ore sintering.
Background technology
Iron ore sintering to the requirement of igniting is: certain ignition temperature is arranged; Certain ignition time; Certain igniting degree of depth; Laterally igniting evenly.The igniting negative pressure has determined the success or not of these requirements.The igniting negative pressure is high more, and the igniting draft is big more, and lighting a fire, heat is very fast is taken away the surface ignition undercapacity.The igniting negative pressure is low more, and the igniting burner hearth forms malleation, flame ejection burner hearth, and draft for want of makes the solid fuel ignition deficiency in draught on compound top layer, same influence igniting effect.Therefore the key of ignition control device is control igniting negative pressure.
At present, the control of igniting negative pressure generally is to be that 1#～3# bellows negative pressure below the lighter for ignition realizes by regulating below the sintering machine head end, the bellows main body of 1#～3# bellows is connected with the bellows standpipe, be provided with the bellows turnover panel in the bellows standpipe, regulate the bellows negative pressure by regulating bellows turnover panel aperture, thus control igniting negative pressure.There is following drawback in this negative-pressure ignition control device:
(1) bellows turnover panel place gas velocity height, erosive wear is serious.
(2) in the bellows and bellows standpipe corner gas velocity low, be easy to generate the bulk cargo bonding and pile up.
(3) in case bulk cargo pile up to stop up the bellows standpipe, the pallet bottom of 1#～3# bellows is easily gone here and there wind.
(4) after the bellows turnover panel lost efficacy, the igniting negative pressure was uncontrollable.
The another kind of technical scheme of negative-pressure ignition control device is: a bypass pipe respectively is installed on the bellows standpipe of the left and right sides of bellows, is inserted large flue, be used for reducing the exhausting negative pressure of bellows.The shortcoming of this control device is: bypass pipe is easily blocked by bulk cargo, the negative pressure control fails.
Especially for the vanadium ilmenite concentrate, because vanadium ilmenite concentrate balling property is poor, the sinter mixture fine size, material is very easily leaked in the bogie grates gap, stops up the bellows valve; In addition, the vanadium titano-magnetite fusing point is higher, and permeability of sintering material bed is poor, and ignition parameter (ignition temperature, igniting negative pressure, ignition time) obviously is different from common iron ore.So effect extreme difference of above two kinds of negative-pressure ignition control devices.
Summary of the invention
In order to overcome the deficiency that existing negative-pressure ignition control device is easily stopped up by bulk cargo,, technical problem to be solved by this invention piles up the negative-pressure ignition control device that is used for iron ore sintering that is difficult for inefficacy thereby providing a kind of bulk cargo that prevents.
The technical solution adopted for the present invention to solve the technical problems is: the negative-pressure ignition control device that is used for iron ore sintering, comprise the bellows main body, be connected the bellows standpipe on the bellows main body, and large flue and the bypass pipe that is connected bellows standpipe and large flue, the turnover pipe is set between bellows standpipe and bypass pipe, the blast inlet of turnover pipe is connected with the bellows standpipe, the air outlet of turnover pipe is connected with bypass pipe, and on the inwall of turnover pipe, fixedly install dividing plate and make and distinguished and admirablely flow through from this section path bottom, the air intake direction of turnover pipe is perpendicular to air-out direction, divider upright is provided with turnover panel in the air-out direction setting in the bypass pipe.
The invention has the beneficial effects as follows: by in the path between bellows standpipe and bypass pipe dividing plate being set, make bellows have dedusting function, be distinguished and admirable after entering this section path, the distinguished and admirable bulk cargo of bringing into will move downward because of the deadweight of dividing plate and bulk cargo, be deposited on the bottom of this section path, and can not enter bypass pipe, thereby avoided the obstruction of bypass pipe.In bypass pipe, install the turnover panel (electric butterfly valve) of may command aperture again additional, the negative pressure that the aperture of utilization adjusting bypass pipe is come point of adjustment windburn case.The bottom that the bellows standpipe connects the turnover pipe is equipped with Double-deck cinder discharge valve, seals on the one hand, on the other hand the settling after easy cleaning work for some time.Negative-pressure ignition control device of the present invention can be flexibly reference mark windburn case negative pressure and combustion chamber draft effectively, keep normally carrying out of sintering process, save the igniting energy consumption.
Description of drawings
Fig. 1 is a synoptic diagram of the present invention.
Fig. 2 is the plot plan of bellows.
Fig. 3 is the facade layout drawing of bellows.
Be labeled as 1-bellows, 2-bellows standpipe, 3-blast inlet, the 4-pipe of transferring, 5-dividing plate, 6-bypass pipe, 7-electric butterfly valve, 8-large flue, 9-air outlet, 10-Double-deck cinder discharge valve, 11-turnover tubular axis line among the figure.
Solid arrow is depicted as wind direction among the figure.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As Fig. 1, Fig. 2 and shown in Figure 3, the negative-pressure ignition control device that is used for iron ore sintering of the present invention, comprise bellows main body 1, be connected the bellows standpipe 2 on the bellows main body 1, and large flue 8 and the bypass pipe 6 that is connected bellows standpipe 2 and large flue 8, in the path between bellows standpipe 2 and bypass pipe 6 dividing plate 5 is set, dividing plate 5 is fixed on the inwall of this section path and makes and distinguished and admirablely flows through from this section path bottom.Distinguished and admirable behind this section path that enters between bellows main body 1 and the bypass pipe 6, the distinguished and admirable bulk cargo of bringing into will move downward because of dividing plate 5, be deposited on the bottom of this section path, and can not enter bypass pipe 6, thereby avoided the obstruction of bypass pipe 6, avoided the inefficacy of described negative-pressure ignition control device.
For the ease of collect and the cleaning work process in sedimentary bulk cargo, this section path adopts turnover pipe 4, the blast inlet 3 of turnover pipe 4 is connected with bellows standpipe 2, the air outlet 9 of turnover pipe 4 is connected with bypass pipe 6, transfers and manages 4 bottoms installation Double-deck cinder discharge valve 10.The working process of Double-deck cinder discharge valve 10 is, closes the upper strata valve and changes lower floor's valve and can finish and unload ash work, unsnatches to close lower floor's valve behind the ash and change the upper strata valve, carries out repeatedly after at set intervals, and this operation process is automatic control fully.In order to guarantee good dust removing effects, the air intake direction of design turnover pipe 4 is perpendicular to air-out direction, and correspondingly, dividing plate 5 can be provided with perpendicular to the air intake direction, reach dividing plate 5 for the good isolated effect of bulk cargo, is difficult in the bypass pipe 6 heaping bulk cargos and blocked.
For the negative pressure of reference mark windburn case better, the turnover panel of its aperture of may command is set in bypass pipe 6, air quantity was big when aperture was big, the negative pressure height, aperture hour air quantity is little, and negative pressure is low.
Realize control automatically for convenience, described turnover panel can adopt electric butterfly valve 7.
Embodiment:
At a 130m
2The test negative-pressure ignition control device that is used for iron ore sintering of the present invention on the sinter machine, 1#, 2# under the sinter machine head lighter for ignition, 3# bellows are transformed, each bellows standpipe 2 of large flue 8 both sides is connected with large flue 8 with the bypass pipe 6 that has electric butterfly valve 7 by turnover pipe 4, perpendicular to air-out direction dividing plate 5 is installed on the inwall of turnover pipe 4, and the electric control gear of control electric butterfly valve 7 has been installed.This negative-pressure ignition control device adopts the control design variable shown in the table 1.
Table 1 negative pressure ignition control design variable
| Project | The igniting negative pressure | The igniting air quantity | Igniting bellows area | The by-pass valve control diameter | Valve conducting area |
| Unit | Pa | m 3/min | m 2 | mm | m 2 |
| The 1# bellows are left and right | 300×9.8 | 42.39×2 | 2.5×2 | 300 | 0.07065×2 |
| The 2# bellows are left and right | 500×9.8 | 75.36×2 | 2.5×2 | 400 | 0.1256×2 |
| Project | The igniting negative pressure | The igniting air quantity | Igniting bellows area | The by-pass valve control diameter | Valve conducting area |
| The 3# bellows are left and right | 800×9.8 | 117.75×2 | 2.5×2 | 500 | 0.19625×2 |
(1) negative pressure igniting commercial test results
1. the bellows negative pressure actual measurement of negative pressure igniting
Table 2 is implemented back bellows negative pressure actual measurement parameter (Pa)
| Project | The 1# bellows are left and right | The 2# bellows are left and right | The 3# bellows are left and right |
| Actual measurement igniting negative pressure minimum value | 150×9.8 | 300×9.8 | 500×9.8 |
| Actual measurement igniting negative pressure maximum value | 500×9.8 | 650×9.8 | 950×9.8 |
2. negative pressure igniting combustion chamber draft actual measurement
Uniform distribution a, b, 4 position detection combustion chamber drafts of c, d on the chassis transverse width below lighter for ignition, measuring point is apart from bed of material 20mm.The detection of negative pressure instrument is a compensate-type micropressure meter, and its precision is 0.01mmH
2O.
Rigid condition during measurement, 1# bellows 300 ± 20mmH
2O, 2# bellows 700 ± 20mmH
2O, 3# bellows 950 ± 20mmH
2O, machine speed 2.2m/min.As seen from Table 3, after the igniting of implementation negative pressure, combustion chamber draft is by 3.91mmH
2O (being 38.3Pa) is reduced to 1.97mmH
2O (being 19.3Pa) reduces by 50%.
In the table 3, twice measuring result before implementing with implement after four measuring results contrast.
Igniting burner hearth detection of negative pressure (mmH before and after the igniting of table 3 negative pressure is implemented
2O)
(2) negative pressure igniting commercial test result
It in table 4 and the table 5 contrast of using negative-pressure ignition control device front and back sinter machine correlation parameter of the present invention and technico-economical comparison.
The top layer sinter strength was measured before and after the igniting of table 4 negative pressure was implemented
Changes in process parameters before and after the igniting of table 5 negative pressure is implemented
Claims (3)
1. the negative-pressure ignition control device that is used for iron ore sintering, comprise bellows main body (1), be connected the bellows standpipe (2) on the bellows main body (1), and large flue (8) and the bypass pipe (6) that is connected bellows standpipe (2) and large flue (8), it is characterized in that: turnover pipe (4) is set between bellows standpipe (2) and bypass pipe (6), the blast inlet (3) of turnover pipe (4) is connected with bellows standpipe (2), the air outlet (9) of turnover pipe (4) is connected with bypass pipe (6), and on the inwall of turnover pipe (4), fixedly install dividing plate (5) and make and distinguished and admirablely flow through from this section path bottom, the air intake direction of turnover pipe (4) is perpendicular to air-out direction, dividing plate (5) is perpendicular to the air-out direction setting, and bypass pipe is provided with turnover panel in (6).
2. the negative-pressure ignition control device that is used for iron ore sintering as claimed in claim 1 is characterized in that: Double-deck cinder discharge valve (10) sealing is adopted in described turnover pipe (4) bottom.
3. the negative-pressure ignition control device that is used for iron ore sintering as claimed in claim 1 or 2 is characterized in that: turnover panel adopts electric butterfly valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103042547A CN101338364B (en) | 2008-08-28 | 2008-08-28 | Negative-pressure ignition control device for sintering iron ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103042547A CN101338364B (en) | 2008-08-28 | 2008-08-28 | Negative-pressure ignition control device for sintering iron ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101338364A CN101338364A (en) | 2009-01-07 |
| CN101338364B true CN101338364B (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008103042547A Expired - Fee Related CN101338364B (en) | 2008-08-28 | 2008-08-28 | Negative-pressure ignition control device for sintering iron ore |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836645A (en) * | 2014-03-20 | 2014-06-04 | 莱芜钢铁集团有限公司 | Sintering ignition method with low gas unit consumption |
| CN106123597B (en) * | 2016-06-23 | 2019-05-28 | 攀钢集团西昌钢钒有限公司 | Sintering device handpiece bellows |
| CN106524764B (en) * | 2016-10-28 | 2019-08-13 | 马鞍山钢铁股份有限公司 | A kind of lower negative pressure ignition control device and method |
| CN107702533A (en) * | 2017-11-07 | 2018-02-16 | 马鞍山钢铁股份有限公司 | A kind of sintering ignition tiny structure device |
| CN108489271B (en) * | 2018-06-05 | 2024-03-22 | 任志国 | Negative pressure control device in lower bellows of igniter of sintering machine |
| JP7167651B2 (en) * | 2018-11-14 | 2022-11-09 | 日本製鉄株式会社 | sintering machine |
| CN109959260A (en) * | 2019-04-29 | 2019-07-02 | 山东凯莱特冶金装备有限公司 | It is sintered lower negative pressure igniter and method |
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| CN101338364A (en) | 2009-01-07 |
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