CN110343853A - A kind of sintered heat insulating device, sintering machine and its sintering method - Google Patents
A kind of sintered heat insulating device, sintering machine and its sintering method Download PDFInfo
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- CN110343853A CN110343853A CN201910723579.7A CN201910723579A CN110343853A CN 110343853 A CN110343853 A CN 110343853A CN 201910723579 A CN201910723579 A CN 201910723579A CN 110343853 A CN110343853 A CN 110343853A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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Abstract
The invention discloses a kind of sintered heat insulating device, sintering machine and its sintering methods, belong to agglomerating plant field.The attemperator includes the insulation cover of upper and lower side opening, heat exchanger is disposed in insulation cover, by closure of openings on the upside of insulation cover, the outside air in insulation cover will be entered when heat exchanger is used for sintering operation to preheat, it can make full use of sintering charge level dispersed heat, form the trapezoidal temperature field gradually decreased, improve pallet cross section for oxide homogeneity, to improve the sintering quality on sinter bed top, the rate of return mine is reduced.The sintering machine includes pallet, ignition furnace and above-mentioned attemperator, and the uniformity of the quality from sinter bed top to the well-off oxygen of sinter bed and sintering cross section that improve can be taken into account while heat preservation.The sintering method is sintered using above-mentioned sintering machine, is set by reasonable sintering process, and sintering charge level can be made to guarantee slow uniform rate of temperature fall under the environment of oxygen abundance, and sintering uniformly, improves sintering quality.
Description
Technical field
The invention belongs to agglomerating plant fields, more specifically to a kind of sintered heat insulating device, sintering machine and its sintering
Method.
Background technique
After sintering ignition, sinter bed can be reduced from surface dispersed heat by carrying out isothermal holding, avoid surface layer sinter
Chilling, extend the time that surface layer Phase in Sinter generates, while being conducive to the reproducibility of calcium ferrite system mineral in Binder Phase
And enhanced strength.But keeping temperature rule is not perfect to be easy to cause bed of material surface to occur owing molten phenomenon, agglomerate surface floats
Ash, generation are largely returned mine, and are reduced so as to cause productivity of sinter, Metallurgical Properties of Sinter decline, sintering energy consumption raising.
The igniting heat preservation of sintering machine is generally divided into three sections: first segment is ignition furnace, and second segment is holding furnace (matching burner), the
Three sections are insulation cover (not configuring burner).Wherein, first segment, second segment are configured with burner, force to supply to charge level from combustion air
Oxygen, and third section insulation cover does not configure burner, but be sintered by introducing outside air or oxygen-containing gas help, it is generally divided into suction
Two kinds of forms of gas formula and air blowing type.
Air suction type insulation cover usually passively introduces air from charge level top by suction pressure, to ensure heat insulation effect, heat preservation
Cover top needs closer away from charge level.According to the understanding of inventor, the structure of air suction type insulation cover be can be set to such as Fig. 1 and Fig. 2
It is shown.And when using air suction type insulation cover, air needed for being sintered can be supplied by four approach: first is that from insulation cover tail portion and material
Gap enters between face；Second is that being entered by gap between sintering pallet two sides breast board and insulation cover；Third is that in suction pressure
Ventilation tube valve ventilation in cover top is opened when higher；Fourth is that from before insulation cover holding furnace or ignition furnace tack.
However, four kinds of air inlet approach are in sintering it is possible that following problem: the sky entered by approach one
For gas only by two sides radiant heating at the top of charge level and insulation cover, temperature is lower, and the charge level of air meeting first insulation cover tail portion is inhaled
Enter, the draft closer to ignition furnace direction is bigger, so can tack from ignition furnace, increases gas consumption in ignition, insulation cover is got over
Long this phenomenon is more serious；The air entered by approach two does not preheat substantially, and wherein most is directly entered trolley two
Side edge causes both sides of the edge bed of material top not keep the temperature not only and is also forced chilling；The air velocity entered by approach three is higher
And it is not preheated, the charge level being directly entered below ventilation duct not only weakens heat insulation effect, becomes sinter bed upper layer quality
Difference, and the air capacity and heat insulation effect difference of the entrance of trolley transverse direction charge level are also created, and then it is horizontal to exacerbate sinter trolley
To inhomogeneities；Although the flue gas sucked by approach four can play the role of heating charge level, disappearing for gas for ignition is increased
Consumption, also destroys ignition results.
Air blowing type insulation cover is then typically provided blowing device, by being passed through external hot wind, heats to charge level, to strengthen
The mineraliation of surface layer sinter improves the yield rate of surface layer sinter, reduces quantity of return mines, but it needs external heat source to air
Equal oxygen-containing gas are heated, and improve cost, and do not make full use of sinter bed surface dispersed heat, capacity usage ratio
It is not high.
Currently, the igniting, Insulation when being directed to sintering production in the market also devise some structures, below to this progress
It introduces.
Chinese Patent Application No. are as follows: CN201010018249.7, publication date are as follows: the patent document on July 4th, 2012, it is public
A kind of single preheating, sintering, igniting and heat insulating furnace has been opened, air preheat furnace has been provided in soaking zone, is carried out by burning blast furnace gas
Igniting, after air preheat furnace is used to be preheated coal gas or air, firing temperature needed for meeting ignition furnace.The device
Heat exchanger mainly makes ignition furnace have enough firing temperatures, insulation cover is not set up after holding furnace, therefore can not
Complete step temperature field and heat are provided, subsequent sintered heat insulating effect is simultaneously bad.
Chinese Patent Application No. are as follows: CN201020302783.6, publication date are as follows: the patent document on the 29th of September in 2010, it is public
A kind of sintering ignition heat preservation furnace refractory lining and its sintering ignition heat preservation furnace are opened, mainly by using with heat build-up section
The thermal efficiency that furnace lining structure igniting at enhancing, is kept the temperature, reduces the thermic load of crossbeam.But it is more to there is heat radiation in the middle part of soaking zone
In both ends, makes sinter bed that can undergo the unfavorable process for first cooling down and heating up afterwards when entering soaking zone, influence sintering quality, furthermore
It also lacks the right way to the in liberal supply oxygen of sinter bed.
Chinese Patent Application No. are as follows: CN201210522679.1, publication date are as follows: the patent document on March 20th, 2013, it is public
Opened a kind of sintering ignition furnace, by set up between furnace body lighting section and soaking zone preheating section, preheating section and lighting section it
Between air curtain is set, improve heat utilization rate, reduce scattering and disappearing for ignition heat.But the temperature of the air curtain of the device and firing temperature phase
Difference is larger, chilling has been carried out by being equivalent to when air curtain after sintering feed millet cake fire, to destroy the quality of surface layer sinter.This
Outside, longer soaking zone exacerbates the inhomogeneities of trolley charge level being laterally sintered for hypoxgia and pallet.
The two pieces patent of the oxygen-containing gas such as high temperature air is passed through for two kinds below.
Such as Chinese Patent Application No. are as follows: CN201511002749.0, publication date are as follows: the patent document on July 7th, 2017,
A kind of ignition holding furnace of sintering machine is disclosed, which includes lighting section, soaking zone, which further includes
Hot gas sintering insulation cover, wherein lighting section is connected with soaking zone, hot gas sintering insulation cover be located at after soaking zone and with soaking zone phase
Even.
For another example Chinese Patent Application No. are as follows: CN201610815800.8, publication date are as follows: the patent text on January 25th, 2017
It offers, discloses a kind of super thick bed of material sintering method using pre-sintering for reducing sinter return fine rate, optimize firing temperature and match
It sets the insulation cover of suitable number and is passed through the hot wind of high oxygen amount, can effectively improve the igniting matter of upper and lower level agglomerate surface
Amount extends the mineralising time of surface sintering feed, reduces the cold short phenomenon of sinter.And by the reasonable of upper layer sinter mixture
Coal blending and water transfer, and the roller number of distributing device is reduced, so that upper layer sintered mixture ventilation is improved.Simultaneously according to upper layer mixture
Characteristic, it is suppressed that the segregation of bed of material fuel and granularity, it is too fast to be unlikely to bed of material burning, can be with by comprehensive technical measures
Upper layer sinter and the rate of return mine of entire sinter bed is effectively reduced.
Above-mentioned last two schemes are directed to the heat preservation of charge level and oxygen supply takes certain measure, to be unlikely to expect
Face is cooling too fast and guarantees that oxygen is sufficient, reduces the rate of return mine, but the two is all that hot wind is passed through by outside to carry out to sinter
Heat preservation and oxygen supply, need the heating of external extra heat source, and heat source temperature is excessively high then excessively high for equipment requirement, higher cost,
And it is lower if the temperature spent relative to ignition furnace more than 1000 may cause the chilling of charge level, and this be passed through arranging for hot wind
Apply, the temperature of hot wind be it is constant, the temperature of itself cannot be changed with the reduction of charge level temperature, therefore charge level is difficult to accomplish
It is uniformly cooling, there is certain influence for the Forming Quality of sintering feed, is unfavorable for reducing the rate of return mine.
Summary of the invention
1, it to solve the problems, such as
For existing insulation cover in sintering production, exist tack from ignition furnace, gas consumption is big, charge level by chilling or
The problems such as air capacity that trolley transverse direction charge level enters is uneven, the present invention provides a kind of sintered heat insulating device, can make full use of burning
Ramming material face dispersed heat, forms the trapezoidal temperature field gradually decreased, and for the supply of the cross-sectional direction of pallet uniformly, fill
Foot oxygen, improve pallet cross section for oxide homogeneity, to improve the sintering quality on sinter bed top, reduction is returned mine
Rate.
The present invention also provides a kind of sintering machine, which has a kind of above-mentioned sintered heat insulating device, can be in heat preservation
Combine the uniformity of the quality for improving sinter bed top to the well-off oxygen of sinter bed and sintering cross section.
The present invention also provides a kind of sintering method, it is sintered using a kind of above-mentioned sintering machine, passes through reasonable agglomerant
Skill setting, can make sintering charge level guarantee slow uniform rate of temperature fall under the environment of oxygen abundance, and sintering uniformly, improves burning
Tie quality.
2, technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of sintered heat insulating device, the insulation cover including upper and lower side opening are disposed with heat exchanger in the insulation cover, will protect
Temperature cover upside closure of openings；The outside air in insulation cover will be entered when the heat exchanger is used for sintering operation to preheat.
Further, the insulation cover further includes side baffle, crossbeam and rear baffle；The rear end phase of the crossbeam and ignition furnace
Even, one end connecting cross beam of the heat exchanger, the other end install rear baffle；The side baffle is symmetrically mounted on the length of heat exchanger
The two sides in direction.
Further, the rear baffle lower end is equipped with sealing curtain.
Further, seal groove is arranged by the inside of insulation cover in the side baffle lower end, is filled with sealing material in seal groove
Material；In sintering, the upper end-face edge of the sidebar plate on pallet extends outward sealing plate, and the sealing plate lower end insertion is close
In closure material, sealing structure is formed with side baffle；The sealing material is used to fill the gap between seal groove and sealing plate.
Further, the sealing material is husky or slag.
Further, the heat exchanger uses fin-plate type radiation recuperator.
Further, the heat exchanger has multiple, along the traffic direction laid out in parallel of pallet.
A kind of sintering machine, including pallet, ignition furnace and attemperator, the ignition furnace be mounted on pallet into
Expect above end, the lower section of the pallet is equipped with exhausting system, and the attemperator is arranged in above the charge level of pallet
Ignition furnace rear end；The attemperator uses a kind of above-mentioned sintered heat insulating device.
A kind of sintering method of above-mentioned sintering machine, includes the following steps:
One, ignition furnace is opened, sintering feed cloth on pallet finishes, after ignition furnace is lighted a fire, into insulation cover；
Two, heat exchanger lower part receives the heat radiation of sintering charge level, and the heat exchanger fin for keeping it internal is heated, and air is in exhausting
Enter under the action of system from the top of heat exchanger, carries out heat with heat exchanger fin and exchange, enter sinter bed surface later.
Further, the firing temperature of the ignition furnace is 900~1150 DEG C, and insulation cover near point stove end exit enters
The air themperature for being sintered charge level is 600~950 DEG C, and the air themperature that insulation cover far point stove end exit enters sintering charge level is
10~200 DEG C.
3, beneficial effect
Compared with the prior art, the invention has the benefit that
(1) a kind of sintered heat insulating device of the present invention, what the pallet upper end installation after ignition furnace was connected with ignition furnace
Insulation cover prevents the sintered ore materials come out from ignition furnace from chilling occurs, the quality of sinter is influenced, however, in sintered ore materials
It in combustion process, needs sufficiently to supply oxygen sintered ore materials, the present invention arranges that heat exchanger, air are taken out in sintering in insulation cover
Under the negative pressure of wind system, enter and eventually enter into sintering charge level from the upper end of heat exchanger, the lower end of heat exchanger then receives sintering feed
The air flowed in the hot heat radiation in face and heat exchanging device is heated, to become and burn after passing air through heat exchanger heating
The temperature that knot charge level temperature is close plays heat preservation to sintering charge level and makees while providing sufficient oxygen for sintering charge level
With, make sintering charge level can be with full combustion, the reduction rate of return mine, compared to the mode that more existing insulation cover is blown into high-temperature gas, originally
Invention takes full advantage of sintering charge level dispersed heat, on the one hand only needs suck up outside air, adds without external gas
Hot equipment and be passed through equipment, reduce equipment space occupied and degree erroneous for installation, on the other hand substantially increase sintering production
In capacity usage ratio, and as the temperature of the sintering charge level far from ignition furnace reduces, the air after heat exchanger heats also can
Synchronous cooling is kept therewith, i.e., the hot-air of heat exchanger exit is with own temperature is gradually decreased far from ignition furnace, to make
Sintering charge level has a uniform rate of temperature fall, is conducive to the sintering uniformity of charge level, improves charge level sintering quality；
(2) a kind of sintered heat insulating device of the present invention, is equipped with seal approach in the side of insulation cover and exit, can hinder
It keeps off not heated air to enter from the side of insulation cover and exit, prevents the cooling of sintering charge level too fast, make sintered ore materials
Full combustion reduces the rate of return mine；
(3) a kind of sintered heat insulating device of the present invention, in side baffle lower end, setting is filled with husky or slag seal groove, sintering
The sidebar plate upper end-face edge of trolley two sides extends outward sealing plate, and the lower end of sealing plate is inserted into husky or slag, with side baffle
Form sealing structure.While guaranteeing sealing, sealing plate can carry out small-scale activity, leakproofness in husky or slag
It is good, and according to relatively no motion of static seal, sealing element is easy under the long-term work of sintering machine because of the hair such as vibration
It is raw to loosen, influence leakproofness；
(4) a kind of sintered heat insulating device of the present invention installs heat resistant and wear resistant below the rear baffle in insulation cover exit
Sealing curtain sends out sintering feed swimmingly outside insulation cover while guaranteeing the leakproofness of insulation cover；
(5) existing air suction type or air blowing type insulation cover are difficult in the gas supply of the cross-sectional direction of sintering charge level
Uniformly, lead to the oxygen supply of the cross-sectional direction of pallet and uneven, influence the sintering uniformity of sintering feed, and the present invention one
Kind sintered heat insulating device, it can be pallet that the air outlet slit of heat exchanger is uniformly distributed along the cross-sectional direction of pallet
Uniform, the sufficient oxygen of cross-sectional direction supply, improve the uniformity in pallet cross section, improve the sintering of sintering charge level
Quality reduces the rate of return mine, and further, using fin-plate type radiation recuperator as the heat exchanger in insulation cover, compare convection current
Formula heat exchanger has between heat release rate (thermic load) height, cold fluid heating temperature height, surface temperature and heated medium heating temperature
Difference it is smaller the advantages that, be conducive to the formation in trapezoidal temperature field of the invention, to guarantee that heat exchanger sprays to sintering charge level
Hot-air is close to the temperature of sintering charge level and the uniform decrease in temperature of sintering charge level, and the gas of fin-plate type radiation recuperator lower end goes out
Mouth is evenly distributed on its lower end surface, is sufficiently met to entire sintering charge level for oxide homogeneity, is improved the burning of sintering feed
Tie quality；
(6) a kind of sintering machine of the present invention has a kind of sintered heat insulating device of the invention, can take into account while heat preservation
To the well-off oxygen of sinter bed, improve the quality on sinter bed top and the uniformity in sintering cross section；
(7) a kind of sintering method of the present invention carries out the sintering work of raw material using sintering machine of the invention, by reasonable
The setting of technological parameter after so that sintering feed is left ignition furnace, can guarantee slowly uniform cooling under the environment of oxygen abundance
Rate, and the oxygen supply in sintering charge level cross-sectional direction is uniform, makes sintering feed full combustion, reduces the rate of return mine.
Detailed description of the invention
Fig. 1 is the main view of the air suction type insulation cover in background technique；
Fig. 2 is the top view of the air suction type insulation cover in background technique；
Fig. 3 is the main view of sintering machine；
Fig. 4 is the top view of attemperator；
Fig. 5 is the main view of attemperator；
Fig. 6 is the schematic diagram of insulation cover side baffle sealing structure；
Fig. 7 is the schematic diagram of insulation cover rear baffle sealing structure；
In figure: 1, pallet；11, sidebar plate；12, sealing plate；
2, ignition furnace；
3, insulation cover；31, heat exchanger；32, side baffle；33, crossbeam；34, rear baffle；35, seal groove；36, sealing material；
37, sealing curtain.
Specific embodiment
The present invention is further described below with attached drawing combined with specific embodiments below.
Embodiment 1
In sintering production, after lighting a fire to sintering feed, need to keep the temperature sintering feed, in the prior art, generally
Holding furnace or insulation cover can be installed additional after ignition furnace, the sintering charge level for being detached from ignition furnace 2 is kept the temperature.But it merely adopts
The form of insulation cover is taken, is largely scattered and disappeared although sintering charge level heat can be reduced, the supply of its air or oxygen is relatively inadequate
Abundance, and under the suction pressure effect of the exhausting system below pallet, it can be sintered above charge level from ignition furnace 2
It tacks, influences the work of ignition furnace.And if introducing air in insulation cover upper opening, or between insulation cover tail portion or two sides
It if gap introduces air, and is easy to cause chilling to sintering charge level, influences sintering quality, increase the rate of return mine.
In order to supplement sinter bed top heat, part insulation cover is provided with blowing device, the external warp of blowing device connection
Gas source after crossing heating, and to sintering charge level blowing, to provide oxygen for sintering charge level, and high-temperature gas can also play one
Fixed insulation effect.But when taking the measure, the heating of external extra heat source is needed, for setting if heat source temperature is excessively high
It is standby to require excessively high, higher cost；If temperature is not high, relative to ignition furnace using the residual heat high-temperature gas of equipment component
1000 DEG C or so of temperature may cause the chilling of charge level again, and this measure for being passed through hot wind, the temperature of hot wind be it is constant,
The temperature of itself cannot be changed with the reduction of charge level temperature, therefore charge level is difficult to accomplish uniform cooling, for being sintered charge level
Forming Quality have certain influence, be unfavorable for reduce the rate of return mine.
As shown in Figure 4, Figure 5, the present embodiment provides a kind of sintered heat insulating device, including insulation cover 3, it is mounted on pallet
2 rear end of ignition furnace of 1 top carries out Insulation to the sintering feed come out from ignition furnace 2, below to the specific of insulation cover 3
Structure and working principle are described in detail.
The insulation cover 3 includes heat exchanger 31, side baffle 32, crossbeam 33 and rear baffle 34.Wherein, crossbeam 33 and ignition furnace 2
Rear end be connected, using fire resisting crossbeam；The feed end connecting cross beam 33 of heat exchanger 31, discharge end connect rear baffle 34；Side baffle
32 are symmetrically mounted on the two sides of pallet 1, connect respectively with the two sides of heat exchanger 31.Heat exchanger 31 is upper and lower side opening knot
Structure, the cover top as insulation cover 3 are mounted in insulation cover 3, external empty under the action of exhausting system below pallet 1
Gas enters from the upper end of heat exchanger 31 and circulates downwards, and lower end then receives the lost heat radiation of sintering charge level, makes internal heat exchange
Piece is heated, and when air flows in heat exchanger 31, becomes the heat being close with sintering charge level temperature after being heated by heat exchanger fin
Air makes sintering feed can be with to play insulation effect to sintering charge level while providing sufficient oxygen for sintering charge level
Full combustion reduces the rate of return mine.Compared to the mode that more existing part insulation cover is passed through high temperature oxygen-containing gas, the present embodiment is abundant
Sintering charge level dispersed heat is utilized, the directly contact of 31 top of one side heat exchanger is extraneous, and suction air is more convenient, and nothing
Need external cooking appliance and be passed through equipment, reduce equipment space occupied and degree erroneous for installation, on the other hand pass through
Charge level dispersed heat heats the air of suction, substantially increases the capacity usage ratio in sintering production, and with point of distance
The temperature of the sintering charge level of stove 2 reduces, and the air after the heating of heat exchanger 31 can also keep synchronous cooling, i.e. heat exchanger therewith
31 hot-airs sprayed gradually change own temperature with sintering charge level point of distance stove 2, so that sintering charge level be made to have one
Uniform rate of temperature fall is conducive to the sintering uniformity of charge level, improves charge level sintering quality.
In addition, existing air suction type or air blowing type insulation cover, are difficult to do in the gas supply of the cross-sectional direction of sintering charge level
To uniform, lead to the oxygen supply of the cross-sectional direction of pallet and uneven, influence the sintering uniformity of sintering feed.And this implementation
The attemperator of example, the air outlet slit of heat exchanger 31 are more densely distributed in the bottom of heat exchanger 31, and in pallet 1
Entire charge level on be uniformly distributed, guarantee the oxygen of entire charge level supply uniformly, sufficient, improve the uniform of 1 cross section of pallet
Property, the sintering quality of sintering charge level is improved, the rate of return mine is reduced.In the present embodiment, using fin-plate type radiation recuperator as heat exchange
Device 31, the lower part of heat exchanger 3 receives the heat radiation of sintering charge level, and passes through the heat exchanger fin on 3 top of heat transfer heating heat exchanger.Together
When, entered under the suction function of exhausting system of the air below pallet 1 by the top of heat exchanger 3, and with heat exchanger 3
Heat exchanger fin forms hot-air after being completely heat exchanged, hot-air is blown into sintering feed surface from 3 lower end of heat exchanger again.Compared to more right
There is high heat release rate (thermic load), cold fluid heating temperature height, surface temperature to be situated between with heated for flow heat exchanger, the radiation recuperator
The advantages that difference between matter heating temperature is smaller, is conducive to the formation in the trapezoidal temperature field of the present embodiment, to guarantee to exchange heat
Device sprays to the heat of sintering charge level close to the temperature and the uniform decrease in temperature of sintering charge level of sintering charge level.And fin-plate type radiation heat transfer
The gas vent of device lower end is evenly distributed on its lower end surface, is sufficiently met to entire sintering charge level for oxide homogeneity, is mentioned
The high sintering quality of sintering feed.It is noted that as shown in figure 5, multiple heat exchanger fins in the heat exchanger 3 of the present embodiment exist
It is in from top to bottom the staggered arrangement form in left and right in heat exchanger, when air enters into and through heat exchanger fin from the top of heat exchanger 3,
Glide path in heat exchanger fin is " bow " zig-zag path of alternate folding, thus increase air rest between heat exchanger fin when
Between, so that air is fully absorbed the heat of heat exchanger fin, improves heat exchanger effectiveness.
In addition, sintering feed sucks not preheated air in order to prevent, the present embodiment insulation cover 3 side baffle 32 and after
Sealing structure is equipped at baffle 34.
The sealing structure at side baffle 32 is introduced first: as shown in fig. 6, in 32 lower end of side baffle, close to pallet 1
Inside, bending extend the seal groove 35 of the traffic direction arrangement along pallet 1, are filled with sealing material in seal groove 35
36.It matches, is equipped with sidebar plate 11 in the two sides of 1 traffic direction of pallet, the upper end-face edge of sidebar plate 11 extends outwardly
The sealing plate 12 of rectangular configuration out, sealing plate 12 lower end insertion seal groove 35 in sealing material 36 in, make sidebar plate 11 with
Side baffle 32 forms sealing structure.It is noted that here if using stationary static seal structure, sintered
Cheng Zhong, sealing element is easy under the long-term work of sintering machine because the reasons such as vibration loosen, and is reduced leakproofness, is influenced to be sintered
Quality.Sealing material 36 can be preferable using sand, slag equigranular, mobility, and material resistant to high temperature, certainly, most preferably
Sealing material is husky.Using the husky sealing material as the present embodiment, the lower end of sealing plate 12 is then inserted into sand, to pass through sand
Realize a dynamic sealing effect between seal groove 35 and sealing plate 12, that is, sand seal.Sealing plate 12 can be with sintering platform
The vibration of vehicle 1 carries out small-scale activity, good airproof performance in seal groove 35, and the leakproofness that will not generate above-mentioned static seal reduces
The case where.It should be noted that being relative motion between pallet 1 and insulation cover 3, therefore, in seal groove 35 when sintering
Both ends can open up the notch passed through for the sealing plate 12 on pallet 1, flexible material can be used in notch, as rubber baffle into
Row stops, and can effectively prevent the loss of sealing material 36 in seal groove 35.
Sealing structure at rear baffle 34 as shown in fig. 7, be equipped with sealing curtain 37 at the rear baffle 34 of insulation cover 3, from
And the sintering charge level at rear baffle 34 and the gap between rear baffle 34 are eliminated, improve the leakproofness of insulation cover 3.The present embodiment
In, sealing curtain 37 is using heat resistant and wear resistant sealing curtain common in the market.
In conclusion a kind of sintered heat insulating device of the present embodiment can make full use of sintering by installing heat exchanger 31
Charge level dispersed heat heats the air outside the cover of absorption, and capacity usage ratio is high, and the air after heating can be to sintering
Oxygen needed for charge level provides sintering, and form the trapezoidal temperature field for reducing and gradually decreasing with the temperature of sintering charge level, sintering
Charge level cooling rate is uniform, keeps the sintering for being sintered charge level more uniform, and it is equal to the gas supply of the cross-sectional direction of pallet
It is even, the uniformity of sintering charge level cross section sintering is improved, the sintering quality of sintering feed is improved.
Embodiment 2
As shown in figure 3, a kind of sintering machine, is mainly used for the sintering work of metallurgy sintered factory, various sintering mineral powders are blocking,
And partially remove the objectionable impurities in ore.It includes pallet 1, ignition furnace 2 and attemperator.Wherein, pallet 1 is
The main operation component of sintering machine, sintering feed are lighted a fire on pallet, are sintered, are cooled down, and are equipped with exhausting system below
System, generallys use the devices such as exhaust fan.Ignition furnace 2 is mounted on above the feed end of pallet 1, for lighting sintering feed.
Attemperator can be taken into account to sinter bed supply while heat preservation and be filled using one of embodiment 1 sintered heat insulating device
The oxygen of foot improves the quality on sinter bed top and the uniformity in sintering cross section, and specific structure and working principle are being implemented
It has been described in detail in example 1, has not done describe again herein.
Embodiment 3
A kind of sintering method of sintering machine is sintered work using the sintering machine of embodiment 2, includes the following steps:
One, ignition furnace 2 is opened, firing temperature is 900~1150 DEG C, and sintering feed is burnt after cloth on pallet
It ties trolley 1 and sintering feed is transported by the igniting of ignition furnace 2 with the speed of service of 1.0~2.5m/min, the present embodiment takes 2m/min, needs
It is noted that the speed of service of pallet 1 need to be selected according to actual condition, but generally without departing from above range；It
Afterwards, sintering feed enters insulation cover 3, and the length of insulation cover 3 is set according to actual production technique, is generally kept in 2~10m
Interior, the present embodiment takes 6m.
Two, the lower part of heat exchanger 31 receives the heat radiation of sintering charge level, and passes through changing in heat transfer heating heat exchanger 31
Backing.Meanwhile air enters in heat exchanger 31 from the upper end of heat exchanger 31, and changes under the suction pressure effect of exhausting system
After backing carries out heat exchange, evenly into sintering charge level, keep the sintering each position of charge level especially pallet 1 transversal
On the direction of face for oxide homogeneity.
In this step, what the heat exchanger 31 of 3 entrance of insulation cover absorbed is the sintering charge level just come out from ignition furnace 2
Heat, the air themperature of blowout is 600~950 DEG C, and the temperature of the sintering charge level of 3 entrance of insulation cover is 900-1150
DEG C, for the air being blown into while making full use of the high heat of sintering charge level at this time, the hot air temperature of formation is close to material
Face temperature, it is also preferable to the heat insulation effect of charge level while guaranteeing sufficient oxygen supply；The charge level temperature in 3 exit of insulation cover is
10~200 DEG C, the air themperature that the heat exchanger 31 in exit is blown out also is 10~200 DEG C, and the two is consistent substantially.Thus may be used
Know, along the traffic direction of pallet 1, air themperature that heat exchanger 31 is blown out can with the temperature that gradually decreases of sintering charge level and
It gradually decreases, to enable to be sintered charge level as the operation of pallet 1 uniformly cools down, improves sintering quality.In the step,
It is 0.2-1.5m/s that the air of heat exchanger 31, which enters and leaves flow velocity, can be changed with the variation of sintering operating condition, but generally without departing from this
Range.
After being sintered using above-mentioned sintering method, the sintering quality of sinter bed is improved, especially sintering feed
Layer top, sintering quality significantly improve.
In conclusion a kind of sintering method of sintering machine of the present embodiment makes to burn by the setting of reasonable technological parameter
After ramming material leaves ignition furnace 2, it can guarantee slow uniform rate of temperature fall under the environment of oxygen abundance, so that sintering feed be made to burn
Tie more uniform, raising sintering quality.
Example of the present invention is only that preferred embodiments of the present invention will be described, not to present inventive concept and
Range is defined, and under the premise of not departing from design philosophy of the present invention, this field engineers and technicians are to technology of the invention
The various changes and improvements that scheme is made should all fall into protection scope of the present invention.
Claims (10)
1. a kind of sintered heat insulating device, the insulation cover (3) including upper and lower side opening, it is characterised in that: the interior cloth of the insulation cover (3)
Heat exchanger (31) are equipped with, by closure of openings on the upside of insulation cover (3)；The heat exchanger (31) will enter heat preservation when being used for sintering operation
Cover the outside air preheating in (3).
2. a kind of sintered heat insulating device according to claim 1, it is characterised in that: the insulation cover (3) further includes side block
Plate (32), crossbeam (33) and rear baffle (34)；The crossbeam (33) is connected with the rear end of ignition furnace (2), the heat exchanger (31)
One end connecting cross beam (33), the other end install rear baffle (34)；The side baffle (32) is symmetrically mounted on heat exchanger (31)
The two sides of length direction.
3. a kind of sintered heat insulating device according to claim 2, it is characterised in that: rear baffle (34) lower end is equipped with close
It seals curtain (37).
4. a kind of sintered heat insulating device according to claim 2, it is characterised in that: side baffle (32) lower end is by heat preservation
Seal groove (35) are arranged in the inside for covering (3), are filled with sealing material (36) in seal groove (35)；In sintering, pallet (1)
On the upper end-face edge of sidebar plate (11) extend outward sealing plate (12), sealing material is inserted into sealing plate (12) lower end
(36) in, sealing structure is formed with side baffle (32)；The sealing material (36) is for filling seal groove (35) and sealing plate
(12) gap between.
5. a kind of sintered heat insulating device according to claim 4, it is characterised in that: the sealing material (36) is husky or mine
Slag.
6. a kind of sintered heat insulating device described in any one of -5 according to claim 1, it is characterised in that: the heat exchanger
(31) fin-plate type radiation recuperator is used.
7. a kind of sintered heat insulating device described in any one of -5 according to claim 1, it is characterised in that: the heat exchanger
(31) have it is multiple, along the traffic direction laid out in parallel of pallet (1).
8. a kind of sintering machine, including pallet (1) and ignition furnace (2), the ignition furnace (2) are mounted on pallet (1)
Above feed end, the lower section of the pallet (1) is equipped with exhausting system, it is characterised in that: further includes attemperator；The guarantor
Warm device is arranged in ignition furnace (2) rear end above the charge level of pallet (1)；The attemperator uses claim 1-7
A kind of sintered heat insulating device.
9. a kind of sintering method of sintering machine according to any one of claims 8, includes the following steps:
One, ignition furnace (2) are opened, sintering feed cloth on pallet (1) finishes, after ignition furnace (2) igniting, into guarantor
Temperature cover (3)；
Two, heat exchanger (3) lower part receives the heat radiation of sintering charge level, and the heat exchanger fin for keeping it internal is heated, and air is in exhausting
Enter under the action of system from the top of heat exchanger (3), carries out heat with heat exchanger fin and exchange, enter sinter bed surface later.
10. a kind of sintering method according to claim 9, it is characterised in that: the firing temperature of the ignition furnace (2) is
900~1150 DEG C, the air themperature that insulation cover (3) near point stove (2) end exit enters sintering charge level is 600~950 DEG C, is protected
The air themperature that temperature cover (3) far point stove (2) end exit enters sintering charge level is 10~200 DEG C.
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| CN201910723579.7A CN110343853A (en) | 2019-08-07 | 2019-08-07 | A kind of sintered heat insulating device, sintering machine and its sintering method |
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| CN201910723579.7A CN110343853A (en) | 2019-08-07 | 2019-08-07 | A kind of sintered heat insulating device, sintering machine and its sintering method |
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Cited By (3)
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| CN112393612A (en) * | 2020-04-27 | 2021-02-23 | 中冶长天国际工程有限责任公司 | Reinforced sintering equipment, charge level cooling device and control method thereof |
| CN112393609A (en) * | 2020-04-27 | 2021-02-23 | 中冶长天国际工程有限责任公司 | Reinforced sintering equipment, charge level cooling device and control method thereof |
| CN112393600A (en) * | 2020-04-27 | 2021-02-23 | 中冶长天国际工程有限责任公司 | Steam cooling type gas injection sintering machine and control method thereof |
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| CN112393609B (en) * | 2020-04-27 | 2022-06-24 | 中冶长天国际工程有限责任公司 | Reinforced sintering equipment, charge level cooling device and control method thereof |
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