CN202709739U - Ignition negative-pressure control device of sintering machine - Google Patents
Ignition negative-pressure control device of sintering machine Download PDFInfo
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- CN202709739U CN202709739U CN 201220268510 CN201220268510U CN202709739U CN 202709739 U CN202709739 U CN 202709739U CN 201220268510 CN201220268510 CN 201220268510 CN 201220268510 U CN201220268510 U CN 201220268510U CN 202709739 U CN202709739 U CN 202709739U
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Abstract
The utility model relates to an ignition negative-pressure control device of a sintering machine. The ignition negative-pressure control device comprises a stirring machine pallet (1) and air boxes (5) arranged at the lower part of the pallet, wherein each air box comprises an upper air box and an air box blast pipe (6), and each air box blast pipe (6) is connected with a big flue (9). The ignition negative-pressure control device is characterized in that a throttling orifice (8) is arranged at the junction between each air box blast pipe and the big flue along the cross section of each blast pipe, and a floating air box clapboard (2) is arranged among the front four air boxes (5). The negative-pressure control device achieves the purposes of reducing the sintering ignition negative-pressure and controlling the ignition negative-pressure of a handpiece to be in a range of 6-8kPa. Because the sintering ignition quality is improved, the sinter strength and the finished product rate are improved; after a low negative-pressure ignition technology is used, the sinter drum index is increased, the return fines ratio is reduced, and the comprehensive finished rate is increased; and in addition, the ignition negative-pressure control device disclosed by the utility model has the advantages of simple structure, lower cost and convenience for operation.
Description
Technical field
The utility model relates to a kind of negative pressure control apparatus, relate to specifically iron ore powder sintering igniting bellows negative pressure control apparatus, be applied to the production of continuous pallettype sintering machine, by reducing ignition of sintering process device bottom bellows negative pressure, improve the SINTERING PRODUCTION ignition process, improve Sintering Operation Index.
Background technology
Continuous pallettype sintering machine is applicable to the sintering work of large-scale iron and steel industry sintering plant, mainly is applicable to the sintering plant of large and medium-sized scale to the sintering processes of Iron Ore Powder.The sintering machine body mainly is made of distribution device, igniter, 23 bellows of chassis and its underpart, and each bellows links to each other with large flue, and large flue links to each other with air exhauster by electric precipitation.Corresponding No. 1, No. 2 bellows in igniter nozzles bottom have ash-laden gas to pass through in the bellows.Iron ore powder sintering technique, be with the even cloth of the solid-fuelled compound of interpolation to sintering pallet, about the igniter igniting is to 1150 ℃, utilize draft effect to form negative pressure, along the bed depth direction, carry out high-temperature heating from top to bottom, under the condition of not exclusively fusing, sinter piece into, and flue gas is entered in the atmosphere by the air exhauster extraction.
The exhausting pressure of igniter bottom bellows is very big on the ignition process impact, and the igniting of SINTERING PRODUCTION technological requirement lower negative pressure requires No. 1, No. 2 bellows negative pressure controls built in 5～8kPa, makes to keep zero-pressure or pressure-fired in the igniter burner hearth.Too high igniting negative pressure is unfavorable to sintering process, is mainly manifested in: at first, high negative pressure can be taken out to get tension just being taped against on the chassis loose compound, increases bed of material resistance, reduces sintering output; Secondly, unburned combustible component is inhaled into the bed of material prematurely, and the igniting heat can not concentrate on the top layer, thereby increases gas consumption; The 3rd, the cold air around the igniter pours in the stove, reduces fire box temperature, is unfavorable for improving ignition quality.
In present SINTERING PRODUCTION, generally be to reduce the igniting negative pressure by the aperture that reduces No. 1, No. 2 bellows turnover panel.This need to fall the aperture of turnover panel lower, easily causes putty, and flue gas flow rate is very fast, makes the turnover panel wearing and tearing more serious, uses a period of time end blocking ineffective.Because ash-laden gas is behind turnover panel, its movement locus is at a high speed expansion outwards, the bellows tube wall is produced wash away, and causes bellows damaged.Therefore No. 1, No. 2 bellows negative pressure in firearm bottom, control point are very difficult, and head igniting bellows negative pressure and back bellows negative pressure are more or less the same, and the high negative pressure igniting reduces the sintering ignition quality, affects Sintering Operation Index.
For above-mentioned technical problem, those skilled in the art is also in continuous improvement, for example the patent No. is 200710158348.3, the patent of invention that name is called the dynamic sealing method of a kind of sintering pallet bottom and air box separated beam discloses following technical scheme, mainly realize by seal cover board and positioner thereof, it is characterized in that: connect the dynamic sealing device that between beam and trolley body crossbeam bottom, is provided with the with closure plate at sintering machine two bellows, the bottom of sealing device is connected with air box separated beam, make the top of sealing device cover plate and pallet bottom crossbeam plane at the horizontal level close contact by gravity or spring force, the movable sealing of realization face and face.This technical scheme has solved the string wind phenomenon between bellows and the bellows to a certain extent, but can not well control negative pressure in the bellows, and therefore, a kind of equipment of exigence solves above-mentioned technical problem.
Summary of the invention
The utility model is just for technical problem in the prior art, and a kind of simple in structure, negative pressure control apparatus that cost is lower, easy to operate is provided, this device solves the difficult problem of current ignition of sintering process negative pressure control, realize sintering lower negative pressure ignition process.
In order to solve the problems of the technologies described above, the technical solution of the utility model is as follows: a kind of ignition of sintering process negative pressure control apparatus, the bellows that comprise sintering pallet and be arranged at pallet bottom, described bellows comprise top bellows and bellows airduct, described bellows airduct links to each other with large flue, it is characterized in that: described bellows airduct and large flue interface are provided with restricting orifice.For preventing altering wind between bellows, between front 4 bellows, be provided with the bellows dividing plate that floats.
As a kind of improvement of the present utility model, described restricting orifice is circular, and the centre arranges square opening.With the 450m of Mei Shan iron company
2Large-type sinterer is example, the grate bar height is 12cm, thick is 3cm, long be 49cm, because the fire bars that falls into bellows from sintering device handpiece seldom, can pass through under the prerequisite of restricting orifice satisfying fire bars, reduced bore as far as possible, to reduce by flue gas flow, reduce the bellows negative pressure, the length of side in hole is arranged on 15～25cm.Flue gas namely enters large flue behind orifice plate herein, the flue gas volume expansion, and wind speed reduces, and the ash-laden gas movement locus does not produce friction with the bellows wind pipe wall, the life-span of prolongation bellows airduct.
As a kind of improvement of the present utility model, bracing means is installed around the described restricting orifice, described bracing means adopts " worker " word steel, and structure is " well " glyph framework.Because dust content is large in the head bellows, flow velocity is high, and the large flue internal pressure reaches more than the 16kPa, and therefore inclement condition must carry out consolidation process to orifice plate.Around the square hole lower edge, be welded into " well " glyph framework with the high I-steel of 15cm, the I-steel two ends link to each other with tube wall, orifice plate is formed support on the one hand, can slow down on the other hand ash-laden gas washing away hole wall.
As a kind of improvement of the present utility model, the middle and upper part of described bellows airduct is provided with control valve, and described control valve is double-deck butterfly valve, mainly controls air quantity by bellows by the aperture of regulating double-deck butterfly valve, further reduces the bellows negative pressure.
As a kind of improvement of the present utility model, be provided with 3 unsteady bellows baffle plate devices between 1～No. 4 bellows of sintering machine, the bellows dividing plate adopts the abrasion-proof manganese steel plate, and the bellows dividing plate is installed along the sintering machine horizontal direction, bellows dividing plate length is 70～85cm, and width equals the sintering pallet width.This mounting means is so that float bellows dividing plate and pallet bottom gapless, and good sealing effect can be avoided again and trolley impact.The bellows dividing plate Main Function that floats is to eliminate string wind phenomenon between bellows, achieve effective control igniting negative pressure is under reduction condition of bellows flue gas flow rate, again by regulating the double-deck butterfly valve opening of bellows, can reduce relatively easily the igniting negative pressure, also reduce the degree of wear of butterfly valve and bellows inwall.
As a kind of improvement of the present utility model, it is the circular steel plate of 5-8mm that described restricting orifice adopts thickness, is preferably the circular wear-resisting steel plate of 6mm.
As a kind of improvement of the present utility model, this control device also comprises balancing weight, and described balancing weight links to each other with the afterbody of bellows the lower partition support, and the deep-slotted chip breaker of support front portion is stuck on the gripper shoe.According to lever principle, balancing weight is with bellows float partition jack-up, and dividing plate withstands on pallet bottom, the contact of formation face.
With respect to prior art, the utility model has been realized reduction sintering ignition negative pressure, the head igniting is born be reduced to 6～8kPa by 14～16kPa.Because the improvement of sintering ignition quality, sinter strength and yield rate are improved, behind the use lower negative pressure firing technique, Sinter Tumber Index improves, the rate of return mine descends under the groove, and integrated yield increases, and this apparatus structure is simple, cost is lower, easy to operate.
Description of drawings
Fig. 1 is the utility model structural representation;
Among the figure: 1 is sintering pallet, and 2 are the bellows dividing plate that floats, and 3 is support, and 4 is balancing weight, and 5 is bellows, 6 bellows airducts, and 7 is double-deck butterfly valve, and 8 is restricting orifice, and 9 is large flue, and 10 is igniter.
The specific embodiment
In order to deepen understanding of the present utility model, be described in detail below in conjunction with 1 pair of ignition of sintering process negative pressure control apparatus of accompanying drawing.
Referring to Fig. 1: a kind of ignition of sintering process negative pressure control apparatus, comprise sintering pallet 1, the igniter 10 on chassis top, and the bellows that are arranged at the chassis bottom, described bellows comprise top bellows and bellows airduct 6, described bellows airduct 6 links to each other with large flue 9.No. 1, No. 2 bellows airducts 6 and large flue 9 interfaces are provided with restricting orifice 8 along the airduct cross section, and the bellows airduct is carried out shrinkage cavity.Restricting orifice 8 general employing thickness are the circular steel plate of 5-8mm, are preferably the circular wear-resisting steel plate of 6mm.This restricting orifice 8 is provided with square hole, can should reduce the area in hole by under the prerequisite of restricting orifice falling the fracture fire bars, to reduce by flue gas flow reduction bellows negative pressure as far as possible.Flue gas namely enters large flue behind orifice plate herein, the flue gas volume expansion, and wind speed reduces, and the ash-laden gas movement locus does not produce friction with the bellows wind pipe wall, the life-span of prolongation bellows airduct.
Because dust content is large in the head bellows, flow velocity is high, and the large flue internal pressure reaches more than the 16kPa, and therefore inclement condition must carry out consolidation process to orifice plate.Bracing means is " well " glyph framework.Around the square hole lower edge, be welded into " well " glyph framework with the high I-steel of 15cm, the I-steel two ends link to each other with tube wall, orifice plate is formed support on the one hand, can slow down on the other hand ash-laden gas washing away hole wall.Be the plane around the upper limb in hole, be difficult for causing buildup.Restricting orifice is installed herein, is because flue gas namely enters large flue behind orifice plate, because the flue gas volume expansion, flow velocity reduces, and the direction of motion does not cross with wind pipe wall, thereby has eliminated flue gas washing away the bellows wall.
Middle and upper part at bellows airduct 6 is provided with control valve, and described control valve is double-deck butterfly valve 7, and by the regulating butterfly valve aperture, control further reduces the bellows negative pressure by flue gas flow.Double-deck butterfly valve can open synchronously, cut out.Because bellows are after shrinkage cavity, flue gas flow rate reduces, and has reduced the washing away of valve body, and has prolonged the service life of butterfly valve, has improved the effective control degree to the bellows negative pressure.In order to prevent the string wind phenomenon of 5 in bellows, 5 in bellows are provided with the bellows dividing plate 2 that floats, and concentrate between front 4 bellows, and bellows dividing plate 2 is installed along the sintering machine horizontal direction, and is vertical with the sintering machine longitudinal centre line.This mounting means is so that float bellows dividing plate and pallet bottom gapless, and good sealing effect can be avoided again and trolley impact.The bellows dividing plate Main Function that floats is to eliminate string wind phenomenon between bellows, achieve effective control negative pressure.Under reduction condition of bellows flue gas flow rate, by regulating the double-deck butterfly valve opening of bellows, can reduce relatively easily the igniting negative pressure again, also reduce the degree of wear of butterfly valve and bellows inwall.This control device also comprises balancing weight 4, and described balancing weight 4 links to each other with the end of bellows the lower partition support 3, and there is deep-slotted chip breaker support 3 front portions, are stuck on the gripper shoe.Under the effect of balancing weight 4, the bellows dividing plate withstands on pallet bottom, the contact of formation face.For fear of thermal expansion influence, bellows dividing plate 2 one end bayonet sockets can vertically move along sintering machine on support 3.This negative pressure control apparatus has been realized reduction sintering ignition negative pressure, and head is lighted a fire negative pressure control built in 6～8kPa scope.Because the improvement of sintering ignition quality, sinter strength and yield rate are improved, behind the use lower negative pressure firing technique, Sinter Tumber Index improves, the rate of return mine descends under the groove, and integrated yield increases, and this apparatus structure is simple, cost is lower, easy to operate.
Need to prove; above-described embodiment only is preferred embodiment of the present utility model; do not limit protection domain of the present utility model; being equal to replacement or changing of making on said structure all falls into protection domain of the present utility model, and protection domain of the present utility model is as the criterion with claims.
Claims (10)
1. ignition of sintering process negative pressure control apparatus, the bellows (5) that comprise sintering pallet (1) and be arranged at the chassis bottom, described bellows comprise top bellows and bellows airduct (6), described bellows airduct (6) links to each other with large flue (9), it is characterized in that: described bellows airduct and large flue interface are provided with restricting orifice (8) along the airduct cross section.
2. ignition of sintering process negative pressure control apparatus according to claim 1, it is characterized in that: described restricting orifice (8) is provided with square hole.
3. ignition of sintering process negative pressure control apparatus according to claim 1 is characterized in that: bracing means is installed around the described restricting orifice (8).
4. according to claim 1 and 2 or 3 described ignition of sintering process negative pressure control apparatus, it is characterized in that: the middle and upper part of described bellows airduct (6) is provided with control valve.
5. according to claim 1 and 2 or 3 described ignition of sintering process negative pressure control apparatus, it is characterized in that: be provided with the bellows dividing plate (2) that floats between described bellows and the bellows, the bellows dividing plate (2) that floats is installed along the sintering machine horizontal direction.
6. it is characterized in that according to claim 1 and 2 or 3 described ignition of sintering process negative pressure control apparatus: it is the circular wear-resisting steel plate of 5-8mm that described restricting orifice (8) adopts thickness.
7. ignition of sintering process negative pressure control apparatus according to claim 3 is characterized in that: described bracing means adopts " worker " word steel, and structure is " well " glyph framework.
8. ignition of sintering process negative pressure control apparatus according to claim 4, it is characterized in that: described control valve is double-deck butterfly valve (7).
9. ignition of sintering process negative pressure control apparatus according to claim 5, it is characterized in that: this control device also comprises balancing weight (4), described balancing weight links to each other with bellows the lower partition support (3).
10. ignition of sintering process negative pressure control apparatus according to claim 6 is characterized in that: it is the circular wear-resisting steel plate of 6mm that described circular steel plate adopts thickness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220268510 CN202709739U (en) | 2012-06-08 | 2012-06-08 | Ignition negative-pressure control device of sintering machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220268510 CN202709739U (en) | 2012-06-08 | 2012-06-08 | Ignition negative-pressure control device of sintering machine |
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| CN 201220268510 Expired - Fee Related CN202709739U (en) | 2012-06-08 | 2012-06-08 | Ignition negative-pressure control device of sintering machine |
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Cited By (13)
| 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 |
| CN104896938A (en) * | 2015-06-29 | 2015-09-09 | 马钢(集团)控股有限公司 | Automatic sintering ignition negative-pressure control device |
| CN105066704A (en) * | 2015-07-28 | 2015-11-18 | 天津钢铁集团有限公司 | Sintering ignition control method of sintering machine |
| CN106440811A (en) * | 2016-10-31 | 2017-02-22 | 马鞍山钢铁股份有限公司 | Igniting device and ignition method for sintering |
| CN106524764A (en) * | 2016-10-28 | 2017-03-22 | 马鞍山钢铁股份有限公司 | Low negative pressure ignition control device and method |
| CN107631633A (en) * | 2017-09-12 | 2018-01-26 | 首钢集团有限公司 | Reduce the control method and sintering machine of sintering machine wind box negative pressure |
| CN108489271A (en) * | 2018-06-05 | 2018-09-04 | 任志国 | Negative pressure control apparatus in ignition of sintering process device lower bellows |
| CN109764682A (en) * | 2018-12-20 | 2019-05-17 | 包头钢铁（集团）有限责任公司 | Sintering machine wind box seals baffle arrangement method and the sintering machine using this method |
| CN109764681A (en) * | 2018-12-20 | 2019-05-17 | 包头钢铁（集团）有限责任公司 | A kind of method machine of control sinter bed wind speed distribution uses the sintering machine of this method |
| CN109844435A (en) * | 2016-10-18 | 2019-06-04 | 株式会社Posco | Emission-control equipment and processing method |
| CN110220381A (en) * | 2019-06-10 | 2019-09-10 | 成渝钒钛科技有限公司 | A kind of vanadium titanium sintering tiny structure ignition method |
| CN111412750A (en) * | 2020-04-28 | 2020-07-14 | 北京金都泰拓冶金技术研究有限公司 | Negative pressure control device for sintering machine air box |
| CN114688876A (en) * | 2022-03-30 | 2022-07-01 | 中冶华天南京工程技术有限公司 | Single-fan single-flue exhaust system of medium-sized sintering machine |
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2012
- 2012-06-08 CN CN 201220268510 patent/CN202709739U/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN104896938A (en) * | 2015-06-29 | 2015-09-09 | 马钢(集团)控股有限公司 | Automatic sintering ignition negative-pressure control device |
| CN104896938B (en) * | 2015-06-29 | 2017-05-31 | 马钢(集团)控股有限公司 | A kind of sintering ignition negative pressure automatic control device |
| CN105066704A (en) * | 2015-07-28 | 2015-11-18 | 天津钢铁集团有限公司 | Sintering ignition control method of sintering machine |
| CN105066704B (en) * | 2015-07-28 | 2017-05-31 | 天津钢铁集团有限公司 | A kind of sintering machine sintering ignition control method |
| CN109844435B (en) * | 2016-10-18 | 2020-10-27 | 株式会社Posco | Exhaust gas treatment device and treatment method |
| CN109844435A (en) * | 2016-10-18 | 2019-06-04 | 株式会社Posco | Emission-control equipment and processing method |
| CN106524764A (en) * | 2016-10-28 | 2017-03-22 | 马鞍山钢铁股份有限公司 | Low negative pressure ignition control device and method |
| 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 |
| CN106440811A (en) * | 2016-10-31 | 2017-02-22 | 马鞍山钢铁股份有限公司 | Igniting device and ignition method for sintering |
| CN106440811B (en) * | 2016-10-31 | 2019-01-18 | 马鞍山钢铁股份有限公司 | A kind of sintering ignition device and ignition method |
| CN107631633A (en) * | 2017-09-12 | 2018-01-26 | 首钢集团有限公司 | Reduce the control method and sintering machine of sintering machine wind box negative pressure |
| CN108489271B (en) * | 2018-06-05 | 2024-03-22 | 任志国 | Negative pressure control device in lower bellows of igniter of sintering machine |
| CN108489271A (en) * | 2018-06-05 | 2018-09-04 | 任志国 | Negative pressure control apparatus in ignition of sintering process device lower bellows |
| CN109764682A (en) * | 2018-12-20 | 2019-05-17 | 包头钢铁（集团）有限责任公司 | Sintering machine wind box seals baffle arrangement method and the sintering machine using this method |
| CN109764681B (en) * | 2018-12-20 | 2024-03-08 | 包头钢铁（集团）有限责任公司 | Sintering machine adopting method for controlling wind speed distribution of sinter bed |
| CN109764682B (en) * | 2018-12-20 | 2024-03-08 | 包头钢铁（集团）有限责任公司 | Arrangement method of sealing partition plate of bellows of sintering machine and sintering machine adopting same |
| CN109764681A (en) * | 2018-12-20 | 2019-05-17 | 包头钢铁（集团）有限责任公司 | A kind of method machine of control sinter bed wind speed distribution uses the sintering machine of this method |
| CN110220381A (en) * | 2019-06-10 | 2019-09-10 | 成渝钒钛科技有限公司 | A kind of vanadium titanium sintering tiny structure ignition method |
| CN111412750A (en) * | 2020-04-28 | 2020-07-14 | 北京金都泰拓冶金技术研究有限公司 | Negative pressure control device for sintering machine air box |
| CN114688876A (en) * | 2022-03-30 | 2022-07-01 | 中冶华天南京工程技术有限公司 | Single-fan single-flue exhaust system of medium-sized sintering machine |
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