CN107354294A - A kind of soaking sintering process based on fuel gas injection - Google Patents
A kind of soaking sintering process based on fuel gas injection Download PDFInfo
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- CN107354294A CN107354294A CN201610305961.2A CN201610305961A CN107354294A CN 107354294 A CN107354294 A CN 107354294A CN 201610305961 A CN201610305961 A CN 201610305961A CN 107354294 A CN107354294 A CN 107354294A
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- gas
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- sintering
- branch pipe
- injection
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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
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
Abstract
A kind of soaking sintering process based on fuel gas injection, the technique comprise the following steps：(1) batching step；(2) charging procedure；(3) lighting up procedure；(4) sintering step；(5) it is incubated concurrent heating step：When sinter mixture top layer initially forms agglomerate after firing, by setting insulation heat patching device on sinter mixture top, sintering flue gas or central cooler hot gas are blown to sinter mixture surface；(6) fuel gas injection soaking sintering step：Fuel gas is blown from the top on sinter mixture top layer, fuel gas is burnt in the burning zone of sinter bed；(7) sintering is completed, discharging.The present invention provides a kind of uniforming sintering type gas adding method and device, with solution how solid fuel consumption is reduced on the premise of improving sinter quality the problem of, and the discharge capacity of reduction blast furnace carbon dioxide.
Description
Technical field
The present invention relates to it is a kind of based on fuel gas injection soaking sintering process, it is more particularly to a kind of based on fuel gas injection
Soaking sintering equipment and its application method, belong to sintering art.
Background technology
With the development of modern industry, steel industry day hastens towards saturation, and production capacity is also superfluous, and current most of iron company all exists
Loss.In the case, cost is reduced, energy-saving and emission-reduction just seem extremely urgent, in particular how enter for existing sintering technology
Row is improved to realize this purpose.
Sintering process is to smelt iron a key link in flow, and its principle is by various powdery iron-containing raw materials, is incorporated appropriate combustion
Material and flux, appropriate water is added, makes material that a series of physical chemical change occur after blended and pelletizing on agglomerating plant,
Sinter it is blocking, so as to be sent to blast furnace carry out the next step.
In order to reduce the coke ratio of blast furnace ironmaking and smelting cost, requirement of the blast furnace to sintering deposit is often high intensity and high reproducibility.
In sintering circuit, typically require that sintering deposit has higher intensity, high finished product rate, the relatively low rate of return mine, and relatively low fuel
Consumption.The sintering deposit of high intensity and high reproducibility consumes less coke in blast furnace ironmaking process, so as to reduce carbon dioxide
Discharge.In the long run consider, carbon dioxide discharge-reduction requirement is by as one of bottleneck for restricting development of iron ＆ steel industry.Provided according to correlation
Material is introduced, and sintering accounts for the 60% of industrial discharge total amount with blast furnace process CO2 emissions.Therefore, no matter reduced from enterprise
Cost consideration still from environmental protection angle consider, reduce sintering solid fuel this consumption ratio with reduce blast furnace burden fuel ratio into
For the urgent need of ironmaking technology.In sintering process, control sinter bed maximum temperature and suitable temperature range to sintering
Production and sinter quality are most important.Material layer temperature is higher than 1200 DEG C, can promote the formation of compound calcium ferrite, more than 1400
DEG C, compound calcium ferrite can be decomposed into glass phase silicate again.Compound iron can effectively be controlled by being kept for 1200~1400 DEG C of time
The formation of sour calcium, improve the intensity and reproducibility of sintering deposit.In order to extend more than 1200 DEG C in the bed of material of duration, tradition side
Method is increase coke powder ratio, but because the auto accumulation heat of the bed of material acts on, causes material layer lower part to overheat, temperature will be more than 1400
DEG C, and then have impact on the quality of sintering deposit.
In order to reduce material layer lower part maximum temperature, while ensure the heat on bed of material top again, added in the past using solid fuel point, under
The proportioning of portion's fuel is reduced, top increase, and the deficiency of bottom bed of material solid fuel, the theoretical quilt are supplemented using auto accumulation heat mode
Accept extensively, but practical application in industry is fewer, and reason is that investment is big and operation is difficult to.It is actual also to have sintering plant trial
Solid fuel is reduced, but often due to shortage of heat, sintering deposit burning is impermeable, and yield rate is reduced, and is returned mine and is increased, actual solid
Burnup increases on the contrary.
In the prior art, there is following defect in the insulation ignition furnace of sintering machine：1st, coke ratio is too high：Due to sintering machine production when wind
Stream is to pass through the bed of material from top to down, therefore before combustion zone reaches sinter bed bottom, bottom frit material is to be in heat-accumulating process.
So our cans analyze：Closer to bottom, the coke ratio of supplying required for sintering feed is fewer (because amount of stored heat foot
It is enough).In other words, rational coke proportioning should be gradually decreased from top to down in sintering feed.And in actual production, due to
Lack feasible segregation cloth Jiao means and device, therefore have to the coke cloth in the upper and lower bed of material into equally matching, it is so not only unrestrained
Taken amount of coke, increased meaningless energy consumption, and the bottom bed of material sintering feed also due to temperature is too high and degradation.2、
CO2Discharge capacity is big：Due to the amount of coke needed when the amount of coke being incorporated under prior art is rationally produced much larger than reality, therefore producing
CO caused by middle burning2Amount is also significantly increased.3rd, sinter quality cannot be effectively ensured：Because Jiao is incorporated in sinter bed bottom
Required amount of coke when charcoal amount is much larger than actual rationally production, therefore cause it temperature is too high in production, generate to sinter quality
Harmful glass phase silicate, there is negative effect to intensity of transferring shares, reduction degree and the low temperature reduction degradation index of finished product sintering deposit.
Under this overall situation, " the sintering charge level gaseous fuel injection technology " of Japanese JFE companies exploitation arises at the historic moment, its principle
It is the gaseous fuel that below combustible concentration lower limit is diluted to by being blown above the sintering charge level of the latter segment distance of ignition furnace, makes it
The combustion heat supplying in sinter bed, so as to reduce the solid carbon dosage and CO in sintering deposit production2Discharge capacity.Simultaneously as gas
The burning of fluid fuel broadens high temperature bandwidth of the sinter bed in production, so that 1200~1400 DEG C of sintering deposit temperature
Time is extended, so that the intensity of sintering deposit and 5~10mm porositys are effectively strengthened.Current apparently technology
With preferable energy-saving and emission-reduction upgrading effect.
It is of the prior art to be had the following disadvantages provided with blowing device sintering machine：
1. the free degree is not high：Device is fixed structure on height, length (along sintering machine traffic direction) direction, and can not
Change the installation site (apart from ignition furnace tail end distance) of device, if operating mode changes, free regulation can not be realized；
2. bad adaptability：Because the free degree is not high, therefore blowing device can only adapt to single working condition, and can not adapt to it is some more
Kind of frequent or machine speed of reloading changes frequently sintering plant enterprise.
3. service life is short：Because blowing device can not change height, and charge level height is to be changed according to operating mode factor and become in real time
Change, therefore in actual production, the distance on device injection tube lower edge edge on charge level it is difficult to ensure that in the reasonable scope, once
The excessively near situation of appearance distance, then easily cause injection tube to be burnt out by high temperature charge level.
4. security performance is low：Because blowing device can not change height, and charge level height is to be changed according to operating mode factor and become in real time
Change, therefore in actual production, the distance on device injection tube lower edge edge on charge level it is difficult to ensure that in the reasonable scope, once
There is device injection tube lower edge apart from the excessively near situation of charge level, it is also possible to cause gaseous fuel being blown combustion inner pipe, so as to draw
Send out security incident.
5. maintenance cost is high：Because blowing device can not change height, and charge level height is to be changed according to operating mode factor and become in real time
Change, therefore in actual production, the distance on device injection tube lower edge edge on charge level it is difficult to ensure that in the reasonable scope, due to
Injection tube is easily burnt out by high temperature charge level so that manufacturing enterprise must not infrequently change injection tube, so as to greatly improved safeguard into
This.
6. the coupling injection of multiple operation multimedium can not be realized：Blowing device under prior art may be only available for single medium injection gas
Body, for example natural gas or coke-stove gas, and device other can not need to be arranged on same location with hot gas sintering etc. when in use
Sintering aided process coupling use.
7. equipment safety is not high：Blowing device under prior art due to no seal means, so when sintering large flue because
Certain reason and when there is negative pressure deficiency, the combustion gas of injection to charge level does not have enough negative pressure to be inhaled into the bed of material, can be excessive to sintering
Machine both sides platform, personal injury is caused to operative employee.
8. it is not high to partially sinter ore deposit sintering quality：Charge level is gone out due to being unlikely to flame when combustion gas to be ensured is burnt in the bed of material to cause
Security incident, start so in general select 90s after firing, or when sinter bed combustion zone moves down 80mm or so
Spray into combustion gas.But the sintering feed of 80mm thickness above combustion zone is thus caused because matching somebody with somebody burnt very few and not obtaining combustion gas concurrent heating
And sintering quality is low, effect is poor, overall decrease in yield.
The content of the invention
For the deficiency of conventional sintering machine technology, we have developed one kind can by with Some gases and heat smoke substitute for coke,
The covert multisection type for realizing sinter bed segregation cloth Jiao's effect strengthens assisted sintering type ignition holding furnace, in the hope of can overcome the disadvantages that prior art
Defect, it is reached for sintering machine energy-conservation, emission reduction, the purpose of upgrading.
It is an object of the invention to provide a kind of uniforming sintering type gas adding method, with solution how before sinter quality is improved
The problem of putting reduction solid fuel consumption, and reduce the discharge capacity of blast furnace carbon dioxide.
It can strengthen blowing device adjustability and the free degree it is another object of the present invention to provide one kind, multiple operation Jie more can be achieved
Matter coupling injection, security performance is high, sintering quality is good based on its device of the equal thermal sintering of fuel gas injection, in the hope of can overcome the disadvantages that
Prior art defect, realize efficient, safe production.
According to the first embodiment provided by the invention, there is provided a kind of equal sintering methods based on fuel gas injection：
A kind of soaking sintering process based on fuel gas injection, the technique comprise the following steps：
(1) batching step：By iron-bearing material, coal fuel, flux (or solvent) and water through mixed pelletization machine mixing granulation, obtain
Obtain sinter mixture；
(2) charging procedure, sinter mixture is loaded on pallet through distribution device, chassis transports the sinter mixture completed
To the ignition furnace of sintering machine；
(3) lighting up procedure：Ignition furnace above pallet is lighted to the sinter mixture completed so that sintered compound
Expect the fuel combustion on top layer；
(4) sintering step：Air above chassis sinter mixture is pumped into by wind by the wind chamber under pallet
Case so that coal fuel burns to be sintered from material top layer to material lower floor；
(5) it is incubated concurrent heating step：When sinter mixture top layer initially forms agglomerate after firing, by sinter mixture
The insulation heat patching device that portion is set is blown sintering flue gas or central cooler hot gas to carry out insulation concurrent heating to sinter mixture surface；
(6) fuel gas injection soaking sintering step：Fuel gas is blown from the top on sinter mixture top layer, makes fuel gas
Burnt in the burning zone of sinter bed.
Above-mentioned technique also includes：
(7) discharge step：Sintering is completed, from chassis loading and unloading material.
Preferably, in step (6), in step (6), along the traffic direction of chassis, injection can above chassis
In the section of combustion gas body：It is diluted, or is being blown by being blown fuel gas fuel gas in the section in the section
Above the position of fuel gas simultaneously blowing hot air make it that fuel gas is diluted in the section.Typically, transported along chassis
On line direction in the section of injection fuel gas, space above chassis is diluted to 1-7vol% after fuel gas is ejected,
Preferably 1.5-6vol%, more preferably 2-5vol% concentration.
In the present invention, the ratio of each component is in step (1)：
Iron-bearing material：10-30 parts by weight, preferably 12-25 parts by weight, more preferably 15-20 parts by weight；
Coal fuel：1-5 parts by weight, preferably 1.5-4 parts by weight, more preferably 2-3 parts by weight；
Flux (or solvent)：1.5-10 parts by weight, preferably 2-8 parts by weight, more preferably 3-6 parts by weight；
Water：1.5-10 parts by weight, preferably 2-8 parts by weight, more preferably 3-6 parts by weight.
In the present invention, the coal fuel described in step (1) is coke powder, coal dust or coke powder and the mixing both coal dust.
In the present invention, flux in lime stone, dolomite, quick lime, serpentine, calcium hydroxide one or more (such as
Two or three).
In the present invention, the fuel gas in step (6) is blast furnace gas, oven gas, blast furnace-coke oven mixed gas, propane flammable gas
One or more in body, natural gas and methane gas.
Along the traffic direction of chassis, the length range that this section of fuel gas is blown above chassis is the point in ignition furnace
5-22m, preferably 8-20m after fire point, more preferably 10-18m, such as 15m.
In the present invention, the concentration of injection fuel gas is 1-7vol%, preferably 1.5-6%, more preferably 2-5% in step (6).
According to second of embodiment provided by the invention, there is provided a kind of multisection type strengthens assisted sintering type ignition holding furnace：
A kind of multisection type strengthens assisted sintering type device, including sintering machine, ignition furnace and assisted combustion device.The sintering machine includes
Chassis, and be successively set on along chassis traffic direction, the ignition furnace and assisted combustion device above chassis.Assisted combustion device
Including hot air apparatus, blowing device and auxiliary combustion cover.Hot air apparatus and blowing device are arranged on auxiliary combustion cover.Hot blast fills
Put including hot air duct.Hot air duct is stretched into or led in auxiliary combustion cover.Blowing device include gas header pipe, combustion gas branch pipe,
Injection tube and support.Gas header pipe is arranged on outside auxiliary combustion cover.Combustion gas branch pipe one end connection gas header pipe connects with the other end
Injection tube.Combustion gas branch pipe is stretched into auxiliary combustion cover.Injection tube is arranged on support.Support be located in auxiliary combustion cover and
The top of chassis, such as support are mounted directly or indirectly in the side wall of auxiliary combustion cover.
Preferably, the inner space of auxiliary combustion cover is additionally provided with fairing.Fairing is located at the injection tube of blowing device
Top but below the air outlet of the hot air duct of hot air apparatus.
Preferably, the fairing is one or both of cowling panel, rectification hole.
Preferably, there is one section of metal hose on combustion gas branch pipe.The metal hose is arranged on combustion gas branch pipe and auxiliary combustion cover
At link position.
Preferably, it is additionally provided with positioning hole in the side wall of auxiliary combustion cover.Support is placed on positioning hole.
Preferably, device also includes bolt.The bolt connects positioning hole and support.
Preferably, the vertical direction of the side wall of auxiliary combustion cover is provided with 1-20 positioning hole, preferably 2-10 positioning hole,
More preferably 3-5 positioning hole.
Preferably, the horizontal direction of the side wall of auxiliary combustion cover is provided with 1-20 positioning hole, preferably 2-10 positioning hole,
More preferably 3-5 positioning hole.
Preferably, device also includes sealing device.Sealing device includes sealing plate and seal groove.Sealing plate is arranged on auxiliary combustion
In the side wall for burning cover.Seal groove is arranged on the side plate of chassis.
Preferably, sealing device is using the one or more in liquid-tight envelope, husky sealing or shell fragment sealing.
Preferably, device also includes insulation heat patching device.Insulation heat patching device be arranged on assisted combustion device front end and
The top of auxiliary combustion cover.Insulation heat patching device includes fuel gas inlet, air intake and mixed flow bleed pipe.
Preferably, device is provided with 1-10 insulation heat patching device, preferably 2-8 insulation heat patching device, more preferably 3-5
Individual insulation heat patching device.
Preferably, door is spied in the side of ignition furnace provided with ignition furnace.For example, the side of ignition furnace is peeped provided with 1-10 ignition furnace
Depending on door, preferably 2-8 ignition furnace spies on door, and more preferably 3-6 ignition furnace spies on door.
Preferably, door is spied in the side of auxiliary combustion cover provided with assisted combustion device.For example, the side of auxiliary combustion cover is provided with
1-8 assisted combustion device spies on door, and preferably 2-6 assisted combustion device spies on door, and more preferably 3-5 assisted combustion device is peeped
Depending on door.
Preferably, device is additionally provided with blowing medium (such as nitrogen or air) pipeline.Blowing medium pipeline is connected on combustion gas branch pipe.
Preferably, blowing medium pipeline is provided with blowing medium (such as nitrogen or air) pipeline flow control valve.
Preferably, injection tube is section or the injection sleeve pipe of the section above.It is blown the structure that sleeve pipe uses telescopic tube.Injection set
Pipe is provided with injection hole.
Preferably, injection tube is section injection sleeve pipe, and section injection sleeve pipe is extendable sleeve structure.
Preferably, the side connection combustion gas branch pipe of gas header pipe.
Preferably, gas header pipe is provided with 1-15 root combustion gas branch pipes, preferably 2-10 roots combustion gas branch pipe, more preferably 3-8 roots fire
Gas branch pipe.
Preferably, the one or both sides in the horizontal direction of combustion gas branch pipe are provided with injection tube.
Preferably, each combustion gas branch pipe is provided with 1-20 root injection tubes, preferably 2-15 roots injection tube, more preferably 3-10
Root injection tube.
Preferably, gas header pipe is provided with house steward's flow regulator.
Preferably, gas header pipe is provided with house steward's flow detector.
Preferably, combustion gas branch pipe is provided with tube branching flow regulating device.
Preferably, combustion gas branch pipe is provided with branch pipe flow detector.
Preferably, the front end of ignition furnace is additionally provided with charge level detection means.
Preferably, the device also includes control system.Control system and ignition furnace, insulation heat patching device, charge level height detection
Device, blowing medium pipeline flow control valve, house steward's flow regulator, house steward's flow detector, branch pipe Flow-rate adjustment dress
Put, the connection of branch pipe flow detector.The control system control ignition furnace, insulation heat patching device, charge level height detecting device,
Blowing medium pipeline flow control valve, house steward's flow regulator, house steward's flow detector, tube branching flow regulating device and branch
The operation of pipe flow detector.
In the present invention, a certain amount of fuel gas (liquefied natural gas, coke-stove gas) is sprayed into sintering charge level, in sintering negative pressure
In the presence of, fuel gas is drawn into sinter bed, and the burning zone top in the bed of material is ignited heat release, is burnt so as to widen
The burning zone of knot, extends high temperature hold time；Simultaneously as reducing the ratio of solid fuel, drop sintering maximum temperature
It is low, be advantageous to generate compound calcium ferrite, so as to improve sinter quality；On the other hand, carbon dioxide is also greatly reduced
Discharge capacity.
In the present invention, combustion gas blowing device and auxiliary combustion cover are combined.
In loyalty of the invention, the air outlet of hot air apparatus is arranged on the top of the injection tube of blowing device.The present invention is to hot blast conveying pipe
The positions and dimensions in road do not require, can be set according to being actually needed, it is only necessary to which air outlet is arranged in auxiliary combustion cover.
The gas header pipe and combustion gas branch pipe of blowing device of the present invention can install the side of sintering machine, the side of auxiliary combustion cover or auxiliary combustion
Burn the top of cover (it can also be on outside top on internal top that can be).The present invention does not have to the size of gas header pipe and combustion gas branch pipe
It is required that it can be set according to being actually needed.In the present invention, the air outlet of hot air apparatus and injection tube are arranged at auxiliary combustion
In cover.
In the present invention, fairing is additionally arranged inside assisted sintering cover, its purpose is to assisted sintering cover top is come in
Hot blast rectification it is uniform, become the stable combustion-supporting medium of flowing, the combustion gas that will not be sprayed to assisted sintering cover bottom injection tube
Media flow diffusion impacts.The present invention does not require that fairing fairing can be many forms, such as
Rectification hole, cowling panel etc..
In the present invention, the position adjustments of blowing device are realized by positioning hole.It is made up of positioning hole, bolt and support.
Wherein positioning hole is located on the both sides side plate of assisted sintering cover, and N number of (N can be set from low to high>2, adjusted according to actual conditions),
Support is responsible for carrying injection tube, injection tube can be driven to move up and down, the positioning hole of assisted sintering cover both sides is goed deep at support both ends respectively
In, and fastened by bolt.The positioning hole of the present invention is arranged in the side wall of auxiliary combustion cover, can in vertical direction and
It is respectively provided with positioning hole in horizontal direction, the height of the positioning hole regulation blowing pipe on vertical direction, the positioning hole in horizontal direction is adjusted
Save the longitudinal separation of injection tube, that is to say, that the distance between positioning hole regulation blowing pipe and ignition furnace in horizontal direction.Positioning
The number in hole does not receive limitation, and the arrangement of positioning hole can be arbitrary shape, unrestricted, is set according to being actually needed.
In the present invention, device is additionally provided with blowing medium (such as nitrogen or air) pipeline.Blowing medium pipeline is connected to combustion gas branch pipe
On.Blowing medium pipeline is provided with blowing medium (such as nitrogen or air) pipeline flow control valve, as needed, is turned on and off.
In the present invention, sealing device is made up of sealing plate and seal groove.Wherein sealing plate is fixed on assisted sintering cover both sides side
On plate, transfixion during production.Seal groove is fixed on sintering pallet side plate, is moved with trolley movement during production.
A variety of sealing means can be taken between sealing plate and seal groove：Such as liquid-tight envelope, husky sealing or shell fragment sealing.The present invention is to close
Envelope mode does not require.
In the present invention, after section of lighting a fire, the centre position before injection tube set up insulation heat patching device, by fuel gas inlet pipe,
Air inlet duct and mixed flow bleed pipe composition.Insulation heat patching device is vertically mounted on the top of assisted sintering cover, the purpose is to
In order to ensure sintering quality to the sintering feed additional heat with 80mm thickness above defocused combustion zone is reduced.It is incubated heat patching device
Lateral arrangement quantity can be different and different according to sintering pallet width, and being longitudinally arranged quantity can be according between igniting section and injection tube
It is different and different apart from length.The present invention is not required the installation site for being incubated heat patching device, can be set according to being actually needed
It is fixed.In addition, observing for convenience, the sidepiece of igniting section and assisted sintering section, which is equipped with, spies on door.
In the present invention, support is arranged on the positioning hole of auxiliary combustion cover both sides, that is to say, that support is arranged on sintering pallet
Top, the direction of the parallel operation with chassis.Support can be the support of steel bracket or other materials, it is only necessary to being capable of high temperature resistant
Hard material.Support is used to injection tube be made.The structure of support can be arbitrary shape, in the bracket between can be provided with
Reinforcement, for reinforced liner.
In the present invention, fuel manifolds are provided with one section of metal hose, and metal hose can upper and lower within the specific limits, left and right change
Shape, and the normal conveying of fuel can be ensured.Injection tube is connected and communicated with fuel manifolds, and fuel enters from fuel manifolds to be sprayed
Blowpipe.Injection tube is arranged on support, can be fixed setting, can also activity setting.
In the present invention, injection tube is injection sleeve pipe.Injection tube is that 2 sections or the injection sleeve pipe of the 2 section above, preferably 2-10 are saved
Injection sleeve pipe, more preferably 3-8 section injection sleeve pipe.It is blown on each section of sleeve pipe and is equipped with injection hole.As needed,
More piece injection sleeve pipe can be shrunk to the length of a section, and after contraction, the injection hole on each section is overlapping point-blank.According to
Need, more piece injection sleeve pipe can extend the length for 2 sections or more piece, and each section is all connected with adjacent next section.For example,
It is 3 sections to be blown sleeve pipe, and wherein Section 1 (section being connected with fuel manifolds) diameter is maximum and the head end of Section 1 is connected to
On fuel manifolds, Section 2 is taken second place, and Section 3 is minimum.When only needing 1 section length to be blown, Section 2 and the equal quilt cover of Section 3
In Section 1, injection hole is overlapping point-blank on each section.When needing to be blown extension, Section 2 and/or the 3rd
Section is stretched out outside Section 1, and Section 2 head end is connected with Section 1 end, and Section 3 head end is connected with Section 2 end, and participates in spraying
Blow.Can also Section 1 (section being connected with fuel manifolds) diameter it is minimum and the head end of Section 1 is connected on fuel manifolds,
Section 2 is big compared with Section 1, and Section 3 is maximum.When only needing 1 section length to be blown, Section 2 is enclosed in the 1st with Section 3
Section is outer, and injection hole is overlapping point-blank on each section.When needing to be blown extension, Section 2 and/or Section 3 are stretched out
Outside Section 1, Section 2 head end is connected with Section 1 end, and Section 3 head end is connected with Section 2 end, and participates in being blown.Spray
The maximum inner diameter for blowing sleeve pipe is 60mm.Minimum diameter is 10mm.That is, the internal diameter for being blown sleeve pipe is 10-60mm, it is preferable that
15-50mm.After all joint numbers injection sleeve pipes all stretch out, between the length of whole injection tube is less than or equal between consecutive fuel branch pipe
Gap width.
In the present invention, the one or both sides of fuel -supply pipe are provided with fuel manifolds.Gap between consecutive fuel branch pipe is 2~8 meters,
Whole device is provided with 1~24 fuel manifolds, preferably 2~18 fuel manifolds, more preferably 4~12 fuel manifolds.
The one or both sides of fuel manifolds are provided with injection tube in the present invention.Gap between adjacent injection tube is 100~200mm.Often
A piece fuel manifolds are provided with 6~20 injection tubes.The length of injection tube is 2~7 meters.
By installing H at the top of auxiliary combustion cover 62, CO detection and warning device.Once there is large flue negative pressure deficiency,
Bed of material surface does not have enough negative pressure by the combustion gas ＆ air ＆ flue gases mixed gas suction material in cover, and now combustion gas is due to two in cover
Side is provided with sealing device 7, therefore can not be overflowed from both sides, can only be excessive at the top of cover, the H of the top installation of auxiliary combustion cover 62、
CO is detected and warning device is able to detect that.If detecting that H2 or CO are exceeded, illustrate now large flue negative pressure deficiency,
Operating personnel should be prompted to increase bottom throttle opening.In general, H2 the or CO concentration detected should be set as third gear：1 grade
Alarm, 2 grades of emergency alarms, 3 grades of cut-out gas main valves.
When being sintered production using ignition furnace of the present invention：Sinter bed on chassis initially enters igniting section, is lighting a fire
Internal coke is ignited to form combustion zone in the presence of burner.Then chassis continues to move ahead, simultaneously because the effect of large flue negative pressure
Combustion zone slowly moves down.Assisted sintering section is entered with rear chassis, the flame of sinter bed insulation heat patching device injection first is mended
Heat, when combustion zone is displaced downwardly to distance sintering charge level top layer 80mm right positions, chassis enters the lower section of blowing device, and combustion gas is led to
Injection tube is crossed by uniform injection to sintering charge level, at the same the hot blast that is blown into of the hot air duct above assisted sintering cover also with injection tube
The gas medium of injection mixes above sintering charge level, is together drawn into sinter bed.Quilt after gas medium runs into combustion zone
Light, reach assisted sintering, improve the effect of sintering quality.
Compared with prior art, the present invention has following advantageous effects：
1st, to the beneficial effect of sinter bed Temperature Distribution
Using this technique, on bed of material top, the temperature range higher than 1200 DEG C can broaden, because fuel gas is added at the top of the bed of material
Enter, it is different in the burning position of the bed of material from coke powder, just burnt before coke powder is reached, temperature is at 650~700 DEG C.Because of material
Layer is not easy to cool down, therefore the bed of material width more than 1200 DEG C can extend on top.
2nd, to the beneficial effect of bed of material mesopore
Using this technique, the hole in the bed of material more than 5mm increases, and 1~5mm hole is reduced.Extend more than 1200 DEG C of bed of materials
Duration can increase the liquid-phase conversion rate of compound calcium ferrite, improve 1~5mm hole fusion rates, and sinter strength improves therewith.
Meanwhile the micropore quantity increase in sintering deposit less than 1 μm.This is due to that coke proportioning is reduced, and maximum temperature reduces, iron ore
Decline from densification degree.
3rd, to the beneficial effect of bed permeability
Using this technique, burning/fusion zone pressure drop that fuel gas reduces 32% is sprayed into, so as to add the gas permeability of the bed of material.
This technique can make to reduce by 15% pressure drop in the whole bed of material.
4th, the beneficial effect that mineral are organized the formation of
Using this technique, the ratio of sintered combined calcium ferrite is added, sintered combined ferrous acid calcium transformation ratio is increased by 1.6 times,
Reduce glass phase silicate ratio.Gaseous fuel is sprayed into, the duration of 1200~1400 DEG C of sinter bed can be extended, from 150s
Extend to 350~500s.The duration in extension bed of material proper temperature section can reduce compound calcium ferrite and resolve into glass phase silicic acid
Salt.Sinter quality is improved, and the index such as sintering deposit drop strength, low-temperature reduction disintegration, reproducibility all increases.
5th, the device free degree is high：Due to being additionally arranged lowering or hoisting gear (being realized by positioning hole), in process of production if operating mode bar
Part changes, operative employee can according to physical condition come adjust change injection tube height, so as to ensure the effect of assisted sintering,
Improve safety coefficient；It can adapt to some kind of frequent or machine speed of more reloading and change frequently sintering plant enterprise.
6th, the coupling injection of multiple operation multimedium is realized：The present invention first combines combustion gas injection technology with hot air sintering technology,
Hot blast and combustion gas mix in assisted sintering cover, are together drawn into sinter bed.Device adaptability can be not only improved, and favorably
In reduction energy consumption index；
7th, equipment safety performance is high：Due to being additionally arranged sealing device, so when sintering large flue negative pressure occurs because of certain reason
Deficiency, when the combustion gas being blown to charge level does not have enough negative pressure to be inhaled into the bed of material, the gas medium in assisted sintering cover also will not be outer
Overflow to causing casualties on operating platform, but can be overflowed above assisted sintering cover 71.Now it is arranged on assisted sintering cover
CO (H2) the detection alarms of side can alarm to master control room, remind operative employee's processing.
8th, sintering deposit entirety high yield rate：Due to being additionally arranged insulation heat patching device between igniting section and injection tube, therefore sinter bed
Top 80mm sintering feed will not be because of concurrent heating not enough Quality Down, so as to improve overall yield rate.
9th, service life is grown：Because blowing device can change height, and charge level height is to be changed according to operating mode factor and become in real time
Change, therefore in actual production, the distance on device injection tube lower edge edge on charge level can ensure in the reasonable scope, once
The excessively near situation of appearance distance, can be adjusted at any time.
10th, security performance is high：Because blowing device can change height, and charge level height is real-time according to the change of operating mode factor
Change, thus in actual production, the distance on device injection tube lower edge edge on charge level can ensure in the reasonable scope, one
There is device injection tube lower edge apart from the excessively near situation of charge level in denier, can adjust at any time.
11st, maintenance cost is low：Because blowing device can change height, and charge level height is real-time according to the change of operating mode factor
Change, therefore in actual production, the distance on edge is easily guaranteed that in the reasonable scope device injection tube lower edge on charge level, is kept away
Exempt from injection tube easily to be burnt out by high temperature charge level so that manufacturing enterprise need not frequently change injection tube, safeguard so as to significantly reduce
Cost.
12nd, equipment safety is high：Blowing device under prior art due to no seal means, so when sintering large flue because
Certain reason and when there is negative pressure deficiency, the combustion gas of injection to charge level does not have enough negative pressure to be inhaled into the bed of material, can be excessive to sintering
Machine both sides platform, personal injury is caused to operative employee.The present invention uses sealing device, can be very good solve this problem.
Brief description of the drawings
Fig. 1 is present invention process figure；
Fig. 2 is the structure chart of apparatus of the present invention；
Fig. 3 is assisted combustion device sectional view of the present invention；
Fig. 4 is apparatus of the present invention top view；
Fig. 5 is the front view that fairing of the present invention is cowling panel；
Fig. 6 is the top view that fairing of the present invention is cowling panel；
Fig. 7 is the front view that fairing of the present invention is rectification hole；
Fig. 8 is the top view that fairing of the present invention is rectification hole；
Fig. 9 is present invention igniting attemperator structural representation；
Figure 10 is sparge pipe schematic diagram of the present invention；
Figure 11 is that apparatus of the present invention are provided with control system and charge level height detecting device schematic diagram.
Reference：
A1：Wind chamber；A2：Sinter mixture；A3：Compound burning zone；A4：Agglomerate layer；A5：Mixing container；A6：Round roller
Distributing device；A7：Material regulating block；A8：Hang plate；A9：Speed control plate；A10：Flat flitch；A11：Ventilation rods；1：Sintering
Machine；101：Chassis；2：Ignition furnace；201：Ignition furnace spies on door；3：Assisted combustion device；4：Hot air apparatus；401：
Hot air duct；5：Blowing device；501：Gas header pipe；50101：House steward's flow regulator；50102：House steward's flow is examined
Survey device；502：Combustion gas branch pipe；50201：Tube branching flow regulating device；50202：Branch pipe flow detector；50203：
Metal hose；503：Injection tube；504：Support；505：Injection hole；6：Auxiliary combustion cover；601：Fairing；602：
Positioning hole；603：Bolt；604：Assisted combustion device spies on door；7：Sealing device；701：Sealing plate；702：It is close
Sealing groove；8：It is incubated heat patching device；801：Fuel gas inlet；802：Air intake；803：Mixed flow bleed pipe；9：Blowing medium
Pipeline；901：Blowing medium pipeline flow control valve；10：Charge level detection means；11：Control system.
Embodiment
According to the first embodiment provided by the invention, there is provided a kind of soaking sintering process based on fuel gas injection：
A kind of soaking sintering process based on fuel gas injection, the technique comprise the following steps：
(1) batching step：By iron-bearing material, coal fuel, flux (or solvent) and water through mixed pelletization machine mixing granulation, obtain
Obtain sinter mixture；
(2) charging procedure, sinter mixture is loaded on pallet through distribution device, chassis transports the sinter mixture completed
To the ignition furnace of sintering machine；
(3) lighting up procedure：Ignition furnace above pallet is lighted to the sinter mixture completed so that sintered compound
Expect the fuel combustion on top layer；
(4) sintering step：Air above chassis sinter mixture is pumped into by wind by the wind chamber under pallet
Case so that coal fuel burns to be sintered from material top layer to material lower floor；
(5) it is incubated concurrent heating step：When sinter mixture top layer initially forms agglomerate after firing, by sinter mixture
The insulation heat patching device that portion is set is blown sintering flue gas or central cooler hot gas to carry out insulation concurrent heating to sinter mixture surface；
(6) fuel gas injection soaking sintering step：Fuel gas is blown from the top on sinter mixture top layer, makes fuel gas
Burnt in the burning zone of sinter bed；With
(7) sintering is completed, discharging.
Preferably, in step (6), along the traffic direction of chassis, it is blown above chassis in the section of fuel gas：
It is diluted by being blown fuel gas fuel gas in the section in the section, or on the position of injection fuel gas
Side simultaneously blowing hot air make it that fuel gas is diluted in the section.Typically, along can in injection on chassis traffic direction
In the section of combustion gas body, space above chassis is diluted to 1-7vol%, preferably 1.5-6vol% after fuel gas is ejected,
More preferably 2-5vol% concentration.
In the present invention, the ratio of each component is in step (1)：
Iron-bearing material：10-30 parts by weight, preferably 12-25 parts by weight, more preferably 15-20 parts by weight；
Coal fuel：1-5 parts by weight, preferably 1.5-4 parts by weight, more preferably 2-3 parts by weight；
Flux (or solvent)：1.5-10 parts by weight, preferably 2-8 parts by weight, more preferably 3-6 parts by weight；
Water：1.5-10 parts by weight, preferably 2-8 parts by weight, more preferably 3-6 parts by weight.
In the present invention, the coal fuel described in step (1) is coke powder, coal dust or coke powder and the mixing both coal dust.
In the present invention, flux in lime stone, dolomite, quick lime, serpentine, calcium hydroxide one or more (such as
Two or three).
In the present invention, the fuel gas in step (6) is blast furnace gas, oven gas, blast furnace-coke oven mixed gas, propane flammable gas
One or more in body, natural gas and methane gas.
In the present invention, along the traffic direction of chassis, the length range of this section of fuel gas is blown above chassis is
The 5-22m after the ignition point of ignition furnace, preferably 8-20m, more preferably 10-18m, such as 15m.
In the present invention, the concentration of injection fuel gas is 1-7%, preferably 1.5-6%, more preferably 2-5% in step (6).
According to second of embodiment provided by the invention, there is provided a kind of soaking sintering equipment based on fuel gas injection：
A kind of soaking sintering equipment based on fuel gas injection, including sintering machine 1, ignition furnace 2 and assisted combustion device 3.Should
Sintering machine 1 includes chassis 101, and is set gradually along the traffic direction of chassis 101, the ignition furnace 2 and assisted combustion device 3
Above chassis 101.Assisted combustion device 3 includes hot air apparatus 4, blowing device 5 and auxiliary combustion cover 6.Hot air apparatus 4
It is arranged on blowing device 5 on auxiliary combustion cover 6.Hot air apparatus 4 includes hot air duct 401.Hot air duct 401 stretch into or
Lead in auxiliary combustion cover 6.Blowing device 5 includes gas header pipe 501, combustion gas branch pipe 502, injection tube 503 and support 504.
Gas header pipe 501 is arranged on outside auxiliary combustion cover 6.The one end of combustion gas branch pipe 502 connection gas header pipe 501 connects with the other end
Injection tube 503.Combustion gas branch pipe 502 is stretched into auxiliary combustion cover 6.Injection tube 503 is arranged on support 504.Support 504
In auxiliary combustion cover 6 and in the top of chassis 101, such as be mounted directly or indirectly to the both sides of auxiliary combustion cover 6
In side wall.
Preferably, the inner space of auxiliary combustion cover 6 is additionally provided with fairing 601.Fairing 601 is located at blowing device 5
Injection tube 503 top but below the air outlet of the hot air duct 401 of hot air apparatus 4.
Preferably, the fairing 601 is one or both of cowling panel, rectification hole.
Preferably, there is one section of metal hose 50203 on combustion gas branch pipe 502.The metal hose 50203 is arranged on combustion gas branch
At the link position of pipe 502 and auxiliary combustion cover 6.
Preferably, positioning hole 602 is additionally provided with the side wall of auxiliary combustion cover 6.Support 504 is placed on positioning hole 602.
Preferably, device also includes bolt 603.The bolt 603 connects positioning hole 602 and support 504.
Preferably, the vertical direction of the side wall of auxiliary combustion cover 6 is provided with 1-20 positioning hole 602, preferably 2-10 positioning
Hole 602, more preferably 3-5 positioning hole 602.
Preferably, the horizontal direction of the side wall of auxiliary combustion cover 6 is provided with 1-20 positioning hole 602, preferably 2-10 positioning
Hole 602, more preferably 3-5 positioning hole 602.
Preferably, device also includes sealing device 7.Sealing device 7 includes sealing plate 701 and seal groove 702.Sealing plate
701 are arranged in the side wall of auxiliary combustion cover 6.Seal groove 702 is arranged on the side plate of chassis 101.
Preferably, sealing device 7 is using the one or more in liquid-tight envelope, husky sealing or shell fragment sealing.
Preferably, device also includes insulation heat patching device 8.Insulation heat patching device 8 is arranged on the front end of assisted combustion device 3
And at the top of auxiliary combustion cover 6.Being incubated heat patching device 8 includes fuel gas inlet 801, air intake 802 and mixed flow ejection
Pipe 803.
Preferably, device is provided with 1-10 insulation heat patching device 8, preferably 2-8 insulation heat patching device 8, is more preferably
3-5 insulation heat patching device 8.
Preferably, door 201 is spied in the side of ignition furnace 2 provided with ignition furnace.For example, the side of ignition furnace 2 is provided with 1-10
Ignition furnace spies on door 201, and preferably 2-8 ignition furnace spies on door 201, and more preferably 3-6 ignition furnace spies on door 201.
Preferably, door 604 is spied in the side of auxiliary combustion cover 6 provided with assisted combustion device.For example, auxiliary combustion cover 6
Door 604 is spied in side provided with 1-8 assisted combustion device, and preferably 2-6 assisted combustion device spies on door 604, more preferably 3-5
Individual assisted combustion device spies on door 604.
Preferably, device is additionally provided with blowing medium (such as nitrogen or air) pipeline 9.Blowing medium pipeline 9 is connected to combustion gas branch pipe
On 502.
Preferably, blowing medium pipeline 9 is provided with blowing medium (such as nitrogen or air) pipeline flow control valve 901.
Preferably, injection tube 503 is 2 sections or the injection sleeve pipe of the 2 section above.It is blown the structure that sleeve pipe uses telescopic tube.
Injection sleeve pipe is provided with injection hole 505.
Preferably, injection tube 503 is that 3 sections are blown sleeve pipe, and 3 section injection sleeve pipes are extendable sleeve structure.
Preferably, the side connection combustion gas branch pipe 502 of gas header pipe 501.
Preferably, gas header pipe 501 is provided with 1-15 root combustion gas branch pipe 502, preferably 2-10 roots combustion gas branch pipe 502, more
Preferably 3-8 roots combustion gas branch pipe 502.
Preferably, the one or both sides in the horizontal direction of combustion gas branch pipe 502 are provided with injection tube 503.
Preferably, each combustion gas branch pipe 502 is provided with 1-20 roots injection tube 503, preferably 2-15 roots injection tube 503,
More preferably 3-10 roots injection tube 503.
Preferably, gas header pipe 501 is provided with house steward's flow regulator 50101.
Preferably, gas header pipe 501 is provided with house steward's flow detector 50102.
Preferably, combustion gas branch pipe 502 is provided with tube branching flow regulating device 50201.
Preferably, combustion gas branch pipe 502 is provided with branch pipe flow detector 50202.
Preferably, the front end of ignition furnace is additionally provided with charge level detection means 10.
Preferably, the device also includes control system 11.Control system 11 and ignition furnace 2, insulation heat patching device 8, charge level
Height detecting device 10, blowing medium pipeline flow control valve 901, house steward's flow regulator 50101, house steward's flow detection
Device 50102, tube branching flow regulating device 50201, branch pipe flow detector 50202 connect.The control system 11 controls
Ignition furnace 2, insulation heat patching device 8, charge level height detecting device 10, blowing medium pipeline flow control valve 901, house steward's flow
Adjusting means 50101, house steward's flow detector 50102, tube branching flow regulating device 50201 and branch pipe flow detector
50202 operation.
By installing H at the top of auxiliary combustion cover 62, CO detection and warning device.Once there is large flue negative pressure deficiency,
Bed of material surface does not have enough negative pressure by the combustion gas ＆ air ＆ flue gases mixed gas suction material in cover, and now combustion gas is due to two in cover
Side is provided with sealing device 7, therefore can not be overflowed from both sides, can only be excessive at the top of cover, the H of the top installation of auxiliary combustion cover 62、
CO is detected and warning device is able to detect that.If detecting that H2 or CO are exceeded, illustrate now large flue negative pressure deficiency,
Operating personnel should be prompted to increase bottom throttle opening.In general, H2 the or CO concentration detected should be set as third gear：1 grade
Alarm, 2 grades of emergency alarms, 3 grades of cut-out gas main valves.
Embodiment 1
A kind of multisection type strengthens assisted sintering type ignition holding furnace device, including sintering machine 1, igniter 2 and auxiliary combustion dress
Put 3.The sintering machine 1 includes chassis 101, and along the traffic direction of chassis 101, the igniter 2 and assisted combustion device 3
It is successively set on the top of chassis 101.Assisted combustion device 3 includes hot air apparatus 4, blowing device 5 and auxiliary combustion cover 6.Heat
Wind apparatus 4 and blowing device 5 are arranged on auxiliary combustion cover 6.Hot air apparatus 4 includes hot air duct 401.Hot air duct 401
Stretch into or lead in auxiliary combustion cover 6.Blowing device 5 includes gas header pipe 501, combustion gas branch pipe 502, injection tube 503 and branch
Frame 504.Gas header pipe 501 is arranged on outside auxiliary combustion cover 6.The one end of combustion gas branch pipe 502 connects gas header pipe 501 and another
One end connects injection tube 503.Combustion gas branch pipe 502 is stretched into auxiliary combustion cover 6.Injection tube 503 is arranged on support 504.
Support 504 is mounted directly or indirectly in the side wall of auxiliary combustion cover 6.Injection tube 503 is that 3 sections are blown sleeve pipe, 3 section injections
Sleeve pipe is extendable sleeve structure.Injection sleeve pipe is provided with injection hole 505.Gas header pipe 501 is provided with 10 combustion gas branch pipes 502.
The side of each combustion gas branch pipe 502 is provided with 10 injection tubes 503.Gas header pipe 501 is provided with house steward's flow regulator
50101.Gas header pipe 501 is provided with house steward's flow detector 50102.Combustion gas branch pipe 502 fills provided with branch pipe Flow-rate adjustment
Put 50201.Combustion gas branch pipe 502 is provided with branch pipe flow detector 50202.
Embodiment 2
Embodiment 1 is repeated, simply the inner space of auxiliary combustion cover 6 is additionally provided with fairing 601.Fairing 601 is positioned at spray
The top of the injection tube 503 of blowing apparatus 5 but below the air outlet of the hot air duct 401 of hot air apparatus 4.Fairing 601
For cowling panel.
Embodiment 3
Embodiment 2 is repeated, simply fairing 601 is rectification hole.
Embodiment 4
Embodiment 2 is repeated, simply there is one section of metal hose 50203 on combustion gas branch pipe 502.The metal hose 50203 is arranged on
At the link position of combustion gas branch pipe 502 and auxiliary combustion cover 6.
Embodiment 5
Embodiment 4 is repeated, positioning hole 602 is simply additionally provided with the side wall of auxiliary combustion cover 6.Support 504 is placed on positioning hole
On 602.Ignition holding furnace device also includes bolt 603.The bolt 603 connects positioning hole 602 and support 504.
The vertical direction of the side wall of auxiliary combustion cover 6 is provided with 3 positioning holes.The horizontal direction of the side wall of auxiliary combustion cover 6 is provided with
4 positioning holes 602.
Embodiment 6
Embodiment 5 is repeated, simply ignition holding furnace device also includes sealing device 7.Sealing device 7 includes sealing plate 701 and close
Sealing groove 702.Sealing plate 701 is arranged in the side wall of auxiliary combustion cover 6.Seal groove 702 is arranged on the side plate of chassis 101.
Sealing device 7 uses liquid-tight envelope.
Embodiment 7
Embodiment 6 is repeated, simply sealing device 7 is sealed using husky.
Embodiment 8
Embodiment 6 is repeated, simply sealing device 7 is sealed using shell fragment.
Embodiment 9
Embodiment 6 is repeated, simply ignition holding furnace device also includes 3 insulation heat patching devices 8.Insulation heat patching device 8 is arranged on
The front end of assisted combustion device 3 and at the top of auxiliary combustion cover 6.Being incubated heat patching device 8 includes fuel gas inlet 801, sky
Gas entrance 802 and mixed flow bleed pipe 803.
Embodiment 10
Embodiment 9 is repeated, simply door 201 is spied in the side of igniter 2 provided with 4 igniters.The side of auxiliary combustion cover 6
Door 604 is spied in face provided with 3 assisted combustion devices.
Embodiment 11
Embodiment 9 is repeated, simply ignition holding furnace device is additionally provided with blowing medium (air) pipeline 9.Blowing medium pipeline 9 connects
On combustion gas branch pipe 502.Blowing medium pipeline 9 is provided with blowing medium (air) pipeline flow control valve 901.
Embodiment 12
Embodiment 1 is repeated, simply the front end of igniter is additionally provided with charge level detection means 10.
Embodiment 13
Embodiment 1 is repeated, simply the device also includes control system 11.Control system 11 and igniter 2, insulation concurrent heating dress
Put 8, charge level height detecting device 10, blowing medium pipeline flow control valve 901, house steward's flow regulator 50101, house steward
Flow detector 50102, tube branching flow regulating device 50201, branch pipe flow detector 50202 connect.The control system
11 control igniters 2, insulation heat patching device 8, charge level height detecting device 10, blowing medium pipeline flow control valve 901,
House steward's flow regulator 50101, house steward's flow detector 50102, tube branching flow regulating device 50201 and the inspection of branch pipe flow
Survey the operation of device 50202.
Embodiment 14
Embodiment 1 is repeated, simply gas header pipe 501 is provided with 60 combustion gas branch pipes 502.The one of each combustion gas branch pipe 502
Side is provided with 8 injection tubes 503.Gas header pipe 501 is provided with house steward's flow regulator 50101.
Embodiment 15
Embodiment 4 is repeated, simply the vertical direction of the side wall of auxiliary combustion cover 6 is provided with 10 positioning holes.Auxiliary combustion cover 6
The horizontal direction of side wall be provided with 8 positioning holes 602.
Embodiment 16
Embodiment 6 is repeated, simply ignition holding furnace device also includes 6 insulation heat patching devices 8.
Embodiment 17
Embodiment 9 is repeated, simply door 201 is spied in the side of igniter 2 provided with 8 igniters.The side of auxiliary combustion cover 6
Door 604 is spied in face provided with 6 assisted combustion devices.
Embodiment 18
Embodiment 1 is repeated, simply injection tube 5 is the injection sleeve pipe 501 of 5 sections.
Application method 1
Iron-bearing material 84%, fuel coke powder 3.4%, solvent dolomite 8%, water 4.6% are made into starting material, the starting material
After mixing and granulation, sinter mixture A2 is obtained, is loaded through distribution device on the sintering machine of pallet, distribution device includes
Mixing container A5, round roller distributing device A6, material regulating block A7, hang plate A8 (hang plate includes multiple roller screens), speed control
Making sheet A9.Due to the effect of roller screen, large granular materials first fall into 360m2Pallet head on, fallen into after small particles material
On pallet head, play material all in one piece installed in the ventilation rods A11 of sintering device handpiece, material is again through the flat material of flat flitch A10
The material bed of 800mm thickness is uniformly paved into afterwards.Pallet carries material slowly to tail loopy moving, transports to igniter；
It is arranged on the ignition furnace 2 above pallet after distribution device to light the material completed so that the fuel on material top layer
Burning；Air above chassis material is pumped into by bellows by the wind chamber A1 under pallet so that fuel from
Material top layer is burnt to form a burning zone A3 to material lower floor, and agglomerate layer A4 is generated by the caused combustion heat；Point
One section of insulation heat patching device 8 is additionally provided with after stove, the heat patching device is that sintering flue gas or central cooler flue gas are blown to after lighting
Material on, be to ensure sintering quality to reducing with certain thickness sintering feed additional heat above defocused combustion zone.When
When burning zone is away from top layer 100mm, the gaseous mixture of coke-stove gas and flue gas is blown through gas flusher 5 from the top on material top layer,
Make burning zone burning of the coke-stove gas at away from top layer 100mm, injection stops when dropping to 400mm to burning zone, injection point
For four units, each unit corresponds to two bellows under chassis, is first module close to ignition furnace, by that analogy.It is each single
The concentration of coke-stove gas is 2.465% in member, remaining as flue gas；The flow of coke-stove gas is 38.603m in first module3/ min,
The flow of coke-stove gas is 34.743m in second unit3/ min, the flow of coke-stove gas is 30.882m in third unit3/ min,
The flow of coke-stove gas is 27.022m in Unit the 4th3/min.The parameters such as pressure, flow, speed, height during jet, by
Control system controls；Gas flusher includes the gas pipeline on charge level, and control valve is provided with gas pipeline.Sintering knot
Shu Houjing central coolers cool down to obtain sintering deposit, and yield rate brings up to 88.11% from 75.1% after testing, sintering deposit solid fuel consumption
40.11kg/t is reduced to from original 59.1kg/t.Sintering deposit before and after penetrating coke-stove gas is mutually detected into contrast by ore deposit, sprayed into
Compound calcium ferrite is highly improved in sintering deposit after coke-stove gas, brings up to 40.23% from original 30.1%, reduces simultaneously
Degree from original 78% with bringing up to 85%.Not only improve sinter quality, and greatly reduce the discharge of carbon dioxide
Amount.Using the present embodiment method solid fuel amount ratio in the prior art solid fuel dosage reduce 15%~35%.
Claims (21)
1. a kind of soaking sintering process based on fuel gas injection, the technique comprise the following steps：
(1) batching step：By iron-bearing material, coal fuel, flux and water through mixed pelletization machine mixing granulation, it is mixed to obtain sintering
Close material；
(2) charging procedure, sinter mixture is loaded on pallet through distribution device, chassis transports the sinter mixture completed
To the ignition furnace of sintering machine；
(3) lighting up procedure：Ignition furnace above pallet is lighted to the sinter mixture completed so that sintered compound
Expect the fuel combustion on top layer；
(4) sintering step：Air above chassis sinter mixture is pumped into by wind by the wind chamber under pallet
Case so that coal fuel burns to be sintered from material top layer to material lower floor；
(5) it is incubated concurrent heating step：When sinter mixture top layer initially forms agglomerate after firing, by sinter mixture
The insulation heat patching device that portion is set, sintering flue gas or central cooler hot gas are blown to sinter mixture surface；
(6) fuel gas injection soaking sintering step：Fuel gas is blown from the top on sinter mixture top layer, makes fuel gas
Burnt in the burning zone of sinter bed；
(7) discharge step：Sintering is completed, from chassis loading and unloading material.
2. technique according to claim 1, it is characterised in that：In step (6), along the traffic direction of chassis,
It is blown above chassis in the section of fuel gas：By being blown fuel gas fuel gas in the section in the section
Be diluted, or above the position of injection fuel gas simultaneously blowing hot air make it that fuel gas is diluted in the section.
3. technique according to claim 1 or 2, it is characterised in that：Step the ratio of each component is in (1)：
Iron-bearing material：10-30 parts by weight, preferably 12-25 parts by weight, more preferably 15-20 parts by weight；
Coal fuel：1-5 parts by weight, preferably 1.5-4 parts by weight, more preferably 2-3 parts by weight；
Flux：1.5-10 parts by weight, preferably 2-8 parts by weight, more preferably 3-6 parts by weight；
Water：1.5-10 parts by weight, preferably 2-8 parts by weight, more preferably 3-6 parts by weight.
4. according to the technique any one of claim 1-3, it is characterised in that：Coal fuel described in step (1)
For the mixing of both coke powder, coal dust or coke powder and coal dust, and/or
One or more (such as two kind or three of the flux in lime stone, dolomite, quick lime, serpentine, calcium hydroxide
Kind).
5. according to the technique any one of claim 1-4, it is characterised in that：Fuel gas in step (6) is height
One or more in furnace gas, oven gas, blast furnace-coke oven mixed gas, propane gas, natural gas and methane gas, and/or
Along the traffic direction of chassis, the length range that this section of fuel gas is blown above chassis is the point in ignition furnace
5-22m, preferably 8-20m, more preferably 10-18m after fire point.
6. according to the technique any one of claim 1-5, in the process using a kind of based on fuel gas injection
Soaking sintering equipment, the device include sintering machine (1), ignition furnace (2) and assisted combustion device (3), the wherein sintering machine (1)
Set successively including chassis (101), and along chassis (101) traffic direction, the ignition furnace (2) and assisted combustion device (3)
Put above chassis (101), it is characterised in that：Assisted combustion device (3) includes hot air apparatus (4), blowing device (5)
With auxiliary combustion cover (6), hot air apparatus (4) and blowing device (5) are arranged on auxiliary combustion cover (6), hot air apparatus (4)
Including hot air duct (401), hot air duct (401) is stretched into or led in auxiliary combustion cover (6), and blowing device (5) includes
Gas header pipe (501), combustion gas branch pipe (502), injection tube (503) and support (504), gas header pipe (501) are arranged on
Auxiliary combustion cover (6) is outside, and combustion gas branch pipe (502) one end connection gas header pipe (501) connects injection tube (503) with the other end,
Combustion gas branch pipe (502) is stretched into auxiliary combustion cover (6), and injection tube (503) is arranged on support (504), support (504)
In auxiliary combustion cover (6) and in the top of chassis (101).
7. technique according to claim 6, it is characterised in that：Also set in the inner space of the auxiliary combustion cover (6)
There is fairing (601), fairing (601) is located at the top of the injection tube (503) of blowing device (5) but filled in hot blast
Below the air outlet for putting the hot air duct (401) of (4)；Preferably, the fairing (601) is cowling panel or whole
One or both of discharge orifice.
8. the technique according to claim 6 or 7, it is characterised in that：Have one section of metal soft on combustion gas branch pipe (502)
Manage (50203), the metal hose (50203) is arranged at the link position of combustion gas branch pipe (502) and auxiliary combustion cover (6).
9. technique according to claim 8, it is characterised in that：It is fixed to be additionally provided with the side wall of the auxiliary combustion cover (6)
Position hole (602), support (504) are placed on positioning hole (602)；Preferably, device also includes bolt (603),
The bolt (603) connection positioning hole (602) and support (504).
10. technique according to claim 9, it is characterised in that：Set on the vertical direction of the side wall of auxiliary combustion cover (6)
There are 1-20 positioning hole (602), preferably 2-10 positioning hole (602), more preferably 3-5 positioning hole (602), and/or
The horizontal direction of the side wall of auxiliary combustion cover (6) is provided with 1-20 positioning hole (602), preferably 2-10 positioning hole (602),
More preferably 3-5 positioning hole (602).
11. according to the technique any one of claim 6-10, it is characterised in that：Device also includes sealing device (7),
Sealing device (7) includes sealing plate (701) and seal groove (702), and sealing plate (701) is arranged on auxiliary combustion cover (6)
Side wall on, seal groove (702) is arranged on the side plate of chassis (101)；Preferably, sealing device (7) is using liquid-tight
One or more in envelope, husky sealing or shell fragment sealing.
12. according to the technique any one of claim 6-11, it is characterised in that：Device also includes insulation heat patching device (8),
Insulation heat patching device (8) is arranged on the front end of assisted combustion device (3) and mended in the top of auxiliary combustion cover (6), insulation
Thermal (8) includes fuel gas inlet (801), air intake (802) and mixed flow bleed pipe (803)；Preferably, device
Provided with 1-10 insulation heat patching device (8), preferably 2-8 insulation heat patching device (8), more preferably 3-5 insulation concurrent heating
Device (8).
13. according to the technique any one of claim 6-12, it is characterised in that：The side of ignition furnace (2) is provided with point
Stove spies on door (201), for example, door (201) is spied in the side of ignition furnace (2) provided with 1-10 ignition furnace, preferably 2-8 is individual
Ignition furnace spies on door (201), and more preferably 3-6 ignition furnace spies on door (201), and/or
Door (604) is spied in the side of auxiliary combustion cover (6) provided with assisted combustion device, for example, the side of auxiliary combustion cover (6)
Door (604) is spied in face provided with 1-8 assisted combustion device, and preferably 2-6 assisted combustion device spies on door (604), more preferably
3-5 assisted combustion device spies on door (604).
14. according to the technique any one of claim 6-13, it is characterised in that：Device is additionally provided with blowing medium (such as nitrogen
Gas or air) pipeline (9), blowing medium pipeline (9) is connected on combustion gas branch pipe (502), and/or
Blowing medium pipeline (9) is provided with blowing medium (such as nitrogen or air) pipeline flow control valve (901).
15. according to the technique any one of claim 6-14, it is characterised in that：Injection tube (503) is 2 sections or 2
The injection sleeve pipe of the above is saved, injection sleeve pipe uses the structure of telescopic tube, and injection sleeve pipe is provided with injection hole (505)；It is preferred that
, injection tube (503) is that 3 sections are blown sleeve pipe, and 3 section injection sleeve pipes are extendable sleeve structure.
16. according to the technique any one of claim 6-15, it is characterised in that：The side of gas header pipe (501) connects
Combustion gas branch pipe (502) is connect, and/or
Gas header pipe (501) is provided with 1-15 root combustion gas branch pipes (502), preferably 2-10 roots combustion gas branch pipe (502), more excellent
Elect 3-8 root combustion gas branch pipes (502) as.
17. according to the technique any one of claim 6-16, it is characterised in that：The level side of combustion gas branch pipe (502)
Upward one or both sides are provided with injection tube (503), and/or
Each combustion gas branch pipe (502) is provided with 1-20 roots injection tube (503), preferably 2-15 roots injection tube (503), more
Preferably 3-10 roots injection tube (503).
18. according to the technique any one of claim 6-17, it is characterised in that：Gas header pipe (501) is provided with total
Pipe flow regulator (50101), and/or
Gas header pipe (501) is provided with house steward's flow detector (50102).
19. according to the technique any one of claim 6-18, it is characterised in that：Combustion gas branch pipe (502) is provided with branch
Pipe flow regulator (50201), and/or
Combustion gas branch pipe (502) is provided with branch pipe flow detector (50202).
20. according to the technique any one of claim 6-19, it is characterised in that：The front end of ignition furnace is additionally provided with charge level inspection
Survey device (10).
21. according to the technique any one of claim 6-20, it is characterised in that：The device also includes control system (11),
Control system (11) and ignition furnace (2), insulation heat patching device (8), charge level height detecting device (10), blowing medium pipeline
Flow control valve (901), house steward's flow regulator (50101), house steward's flow detector (50102), branch pipe flow are adjusted
Regulating device (50201), branch pipe flow detector (50202) connection, the control system (11) control ignition furnace (2), are protected
Temperature compensation thermal (8), charge level height detecting device (10), blowing medium pipeline flow control valve (901), house steward's Flow-rate adjustment
Device (50101), house steward's flow detector (50102), tube branching flow regulating device (50201) and branch pipe flow detection dress
Put the operation of (50202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610305961.2A CN107354294A (en) | 2016-05-10 | 2016-05-10 | A kind of soaking sintering process based on fuel gas injection |
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|---|---|---|---|
| CN201610305961.2A CN107354294A (en) | 2016-05-10 | 2016-05-10 | A kind of soaking sintering process based on fuel gas injection |
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| Publication Number | Publication Date |
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| CN107354294A true CN107354294A (en) | 2017-11-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610305961.2A Pending CN107354294A (en) | 2016-05-10 | 2016-05-10 | A kind of soaking sintering process based on fuel gas injection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108195201A (en) * | 2017-11-23 | 2018-06-22 | 中冶长天国际工程有限责任公司 | A kind of self adaptive control type combustion gas blowing device and its method based on charge level video identification |
| CN108398023A (en) * | 2018-03-28 | 2018-08-14 | 中冶长天国际工程有限责任公司 | A kind of combustion gas injection sintering multilayer coordinated type side-sealing device and its control method |
| CN109554538A (en) * | 2018-12-03 | 2019-04-02 | 武汉钢铁有限公司 | A kind of sintering method and device that can reduce solid fuel consumption amount and carbon emission |
| CN109990605A (en) * | 2018-01-02 | 2019-07-09 | 中冶长天国际工程有限责任公司 | A kind of vertical cooling machine and cooling means with fairing |
| CN110319694A (en) * | 2018-03-31 | 2019-10-11 | 高彦 | Sintering equipment and control method |
| CN110564952A (en) * | 2019-09-09 | 2019-12-13 | 中南大学 | Sintering energy-saving emission-reducing hydrogen-based fuel gas staged injection method |
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| CN108195201A (en) * | 2017-11-23 | 2018-06-22 | 中冶长天国际工程有限责任公司 | A kind of self adaptive control type combustion gas blowing device and its method based on charge level video identification |
| CN108195201B (en) * | 2017-11-23 | 2023-10-27 | 中冶长天国际工程有限责任公司 | Self-adaptive control type gas injection device and method based on charge level video recognition |
| CN109990605A (en) * | 2018-01-02 | 2019-07-09 | 中冶长天国际工程有限责任公司 | A kind of vertical cooling machine and cooling means with fairing |
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| CN108398023B (en) * | 2018-03-28 | 2023-10-27 | 中冶长天国际工程有限责任公司 | Multilayer linkage type side sealing device for gas injection sintering and control method thereof |
| CN110319694A (en) * | 2018-03-31 | 2019-10-11 | 高彦 | Sintering equipment and control method |
| CN109554538A (en) * | 2018-12-03 | 2019-04-02 | 武汉钢铁有限公司 | A kind of sintering method and device that can reduce solid fuel consumption amount and carbon emission |
| CN110564952A (en) * | 2019-09-09 | 2019-12-13 | 中南大学 | Sintering energy-saving emission-reducing hydrogen-based fuel gas staged injection method |
| CN110564952B (en) * | 2019-09-09 | 2020-10-16 | 中南大学 | Sintering energy-saving emission-reducing hydrogen-based fuel gas staged injection method |
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| CN112393600B (en) * | 2020-04-27 | 2022-06-03 | 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 |
| 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 |
| CN111551032A (en) * | 2020-05-15 | 2020-08-18 | 西安交通大学 | Sintering online regulation and control method and system based on gas injection |
| CN111551032B (en) * | 2020-05-15 | 2021-05-04 | 西安交通大学 | Sintering online regulation and control method and system based on gas injection |
| CN113969348A (en) * | 2020-07-23 | 2022-01-25 | 中冶长天国际工程有限责任公司 | Initial section injection method of sintering machine injection process |
| WO2022134322A1 (en) * | 2020-12-22 | 2022-06-30 | 中冶长天国际工程有限责任公司 | Layered compound heat supply-based heat-balanced sintering method |
| RU2790990C1 (en) * | 2020-12-22 | 2023-03-01 | Чжуне Чантянь Интернэшнл Инджиниринг Ко., Лтд. | Method of heat-balanced sintering based on layered combined heat supply |
| CN112725615A (en) * | 2020-12-22 | 2021-04-30 | 中冶长天国际工程有限责任公司 | Soaking sintering method based on layered composite heat supply |
| CN112725619A (en) * | 2020-12-24 | 2021-04-30 | 日照市德衡信息技术有限公司 | Blast furnace dust removal ash processing apparatus |
| CN115216625A (en) * | 2021-11-22 | 2022-10-21 | 中冶长天国际工程有限责任公司 | Gas periodic interval injection auxiliary sintering method |
| CN115216625B (en) * | 2021-11-22 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Method for assisting sintering by gas periodic interval injection |
| WO2023130753A1 (en) * | 2022-01-05 | 2023-07-13 | 中冶长天国际工程有限责任公司 | Three-phase combined heat supply type low-carbon sintering equipment and method |
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Application publication date: 20171117 |