CN108291775A

CN108291775A - Raw material processing and the process for preparing raw material for using the raw material processing

Info

Publication number: CN108291775A
Application number: CN201580084591.8A
Authority: CN
Inventors: 孙相汉; 王敏奎; 金完浩
Original assignee: Posco Co Ltd
Current assignee: Posco Holdings Inc
Priority date: 2015-11-18
Filing date: 2015-12-22
Publication date: 2018-07-17
Anticipated expiration: 2035-12-22
Also published as: KR20170058181A; KR101824111B1; CN108291775B; WO2017086534A1; JP2018537646A; JP6628880B2

Abstract

A kind of material according to the invention process equipment includes：Multiple trolleys, it is filled with the first particle and the second particle in each trolley, first particle is the material for producing reduced iron, second particle is the material for producing sinter and is located at the first particle, wherein, trolley can be moved to the material processing section including the sintering part for being sintered the second particle and the reduction part for restoring the first particle, and reduction part is located at sintering part rear；Ignition furnace is moved to the superficial layer pilot flame on the path of material processing section and towards the second particle mounted on multiple trolleys；Multiple bellows are upwardly arranged at each trolley below multiple trolleys and into multiple trolleys in the side of multiple trolleys movement and provide suction；And positioned at the atmosphere generation unit for restoring in part and having pipeloop, pipeloop, which is used to collect from the trolley of the first particle reduction to restore caused by reduction reaction, is vented and will restore exhaust supply to positioned at the trolley restored in part.Therefore, according to the embodiment of the present invention, it can successively be moved using multiple removable trolleys and sinter and reduced iron are produced with the material processing plant of rapidoprint together.That is, in the material processing plant of removable trolley movement, it can be using same equipment by making predetermined portions be in sintering atmosphere easy to perform and another predetermined portions being made to produce sinter and reduced iron together in atmosphere easy to perform is restored.

Description

Raw material processing and the process for preparing raw material for using the raw material processing

Technical field

The present invention relates to the process for preparing raw material of raw material processing and the use raw material processing, relate more specifically to The raw material processing that sinter and reduced iron can be manufactured together and the process for preparing raw material using the raw material processing.

Background technology

The sinter as raw material produces in the following manner during blast furnace ironmaking：Iron ore and coal as heat source (or coke) mixes and then is sintered iron core by coal combustion, subsequently under the action of the combustion heat.

This typical sinter production equipment for producing sinter includes：Store the furnace bottom layer mine of furnace bottom layer ore Building stones bucket；Memory core raw material and as heat source coke mixing and then granulated material blends buffering hopper；Along one Multiple trolleys of a direction arrangement, the multiple trolley are configured to receive furnace bottom layer ore and material blends, and along process into Cheng Fangxiang is conveyed；Conveyer, the conveying mechanism cause to convey the multiple trolley along machine process direction；Ignition furnace, the point Stove is mounted on by conveyer above the trolley that machine process direction conveys, and ignition furnace is configured to guide flame into filling Agglomerated material in trolley；Multiple bellows, the multiple bellows are arranged in one direction mounted on the multiple trolley and edge Machine process direction is by the path along conveying, and the multiple bellows construction is at the inside for aspirating the multiple trolley； It is connected to the pipe of the end of the multiple bellows；And pipe is connected to generate the air blower (not shown) of suction.

The method that sinter is produced by using this sinter production equipment is described below.It is stored in furnace bottom layer mine Furnace bottom layer ore in building stones bucket is filled into trolley and is conveyed with the material blends being stored in buffering hopper, and Then pass through trolley movement below ignition furnace.At this point, the flame (that is, torch) ejected from ignition furnace is lighted and is filled in platform The top section of agglomerated material in vehicle, i.e. superficial layer.It is defeated along machine process direction by conveyer by the trolley of igniting It send, at this point, trolley passes through above multiple bellows that machine process direction is arranged.Above the bellows by trolley in generate Downward suction, and the flame lighted is moved down due to the air sucked outside trolley.In addition, when trolley reaches position When machine process completes the bellows at position, flame reaches the bottom of trolley.At this point, sintering is completed, and to multiple trolleys For continue aforesaid operations.

In this case, air contains 21% oxygen, and this air is inhaled into trolley, and in trolley It is interior to carry out burning of coal and the holding of flame and movement.In addition, in for the coal that burns inside trolley as described above With the combustion heat by being generated when burning coal come the oxidizing atmosphere of sintered iron ore.

Meanwhile reduced iron be for blast furnace raw material and by by iron ore and coal material (such as coal) blending and then It agglomerates (hereinafter referred to as agglomerating ore) and manufactures, iron ore is reduced by using coal material as reducing agent.For producing The equipment of this iron ore includes：Multiple hoppers of iron material and coal material are stored respectively；Receive and be crushed iron material and coal material The crusher of material；Receive and mix the mixer of iron material and coal material；So that the mixture mixed by mixer is compressed and shapes Former；The reduction furnace that the cohesion ore generated by former is heat-treated and is restored；Simultaneously positioned at the side of reduction furnace Cooling cooling furnace is carried out to generated reduced iron；And the burner of hot-air is provided to reduction furnace.

Cohesion ore is filled into removable trolley, and is moved in reduction furnace and cooling furnace successively.At this point, by from Burner provide hot-air come execute to agglomerate ore reduction.Here, in reduction furnace, as described above, to agglomerating ore It is heat-treated and is restored, thus, it is desirable that in other words the inside of reduction furnace, which becomes reducing atmosphere, becomes nonoxidizing atmosphere.

In this way, above-mentioned reduced iron production equipment has similar device configuration with the sintering machine for producing sinter, Middle raw material is moved by removable trolley, and heat source (flame or hot-air) is supplied to the removable trolley moved successively Bed.

However, as described above, the trolley for producing sinter should be at oxidizing atmosphere, and for producing reduced iron Reduction furnace should be at nonoxidizing atmosphere.Therefore, sinter and reduced iron cannot produce together.

Invention content

Technical problem

The present invention relates to the raw material processing that can produce sinter and reduced iron and use the raw material processing Process for preparing raw material.

The invention also relates to improve the yield for producing sinter and reduced iron be used for sinter and reduced iron Raw material processing and using the raw material processing process for preparing raw material.

Technical solution

According to illustrative embodiments, raw material processing includes：Multiple trolleys are filled with the first particle in each trolley With the second particle, the first particle is the raw material for producing reduced iron, and the second particle is for producing the raw material of sinter and quilt It is filled on the first particle, trolley can be moved to Raw material processing part, and Raw material processing part includes for being sintered second The sintering part of particle and the reduction part for restoring the first particle, reduction part are located at sintering part rear；Ignition furnace, should Ignition furnace is moved to mounted on multiple trolleys on the path along Raw material processing part, and is configured to the table towards the second particle Face layer jet flames；Multiple bellows, under the multiple bellows are arranged in multiple trolleys in multiple trolleys movement direction Side, and be configured to each trolley into multiple trolleys and suction is provided；And atmosphere generation unit, atmosphere generation unit are located at It restores in part and includes pipeloop, which is used to collect by restoring from the trolley that wherein the first particle is reduced Reduction caused by reaction is vented, and pipeloop will restore exhaust supply to positioned at the trolley restored in part.

Pipeloop can have：It is connected to multiple bellows of positioning corresponding with the reduction part in Raw material processing part One end；And it is positioned to the temperature of the top layer of the first particle in trolley in Raw material processing part be 800 DEG C To the corresponding the other end in 1000 DEG C of positions, and pipeloop can supply reduction exhaust.

On the path along trolley movement, when the part for the position that the reduction from ignition furnace to the first particle is completed is determined When justice is entire Raw material processing part, the reduction part of the first particle can be the position being supplied to from pipeloop to reduction exhaust It can be from ignition furnace to reduction to set with the part of position of the reduction completion of the first particle and the sintering part of the second particle It is vented the part for the position being supplied to, wherein the oxygen concentration in reduction part can be conditioned by supplying reduction exhaust, and It is 15% or more that oxygen concentration in sintering part, which can be adjusted,.

Pipeloop may include：Collecting pipe, the collecting pipe include be connected in the multiple bellows with reduction part One end of the multiple bellows being correspondingly arranged, and collecting pipe is configured to collect from multiple trolleys on reduction part The reduction exhaust generated during the reduction reaction of first particle；And first supply pipe, first supply pipe include being connected to receipts One end of collector, and the first supply pipe is configured to go back to what the trolley supply on reduction part was removed from collecting pipe Original exhaust, wherein the first supply pipe can be mounted to and the top layer of the first particle in trolley in Raw material processing part The position that temperature is 800 DEG C to 1000 DEG C corresponds to.

Atmosphere generation unit may include：Air blower, the air blower are mounted on the extension path of collecting pipe to connect To collecting pipe, and Blast mechanism causes to provide suction to collecting pipe；And temperature regulation section, the temperature regulation section are mounted to connect It is connected to collecting pipe, between bellows and air blower, and temperature regulation section is configured to supply extraneous air to collecting pipe, thus The temperature for being collected into the gas in collecting pipe is reduced before gas is by air blower.

Atmosphere generation unit may include the second supply pipe, which includes being connected to an end of collecting pipe And positioned at trolley top and the other end corresponding with sintering part, and the second supply pipe is configured to supply to sintering part Thus exhaust provides heat source to sintering part；And concentration adjustment portion, the concentration adjustment portion are connected to the second supply pipe and structure It causes to supply air to the second supply pipe, to which the oxygen concentration being sintered in part is adjusted to 15% or higher.

Raw material processing may include：Ore discharge unit, the ore discharge unit are located at the end of Raw material processing part Side, wherein the reduced iron that the fully sintered sinter of the second particle and the first particle restore completely can be discharged into mine Stone discharge unit；And the cover between ignition furnace and ore discharge unit, wherein the other end of pipeloop can be connected to Cover, positioning corresponding with the position that the temperature of the top layer of the first particle is 800 DEG C to 1000 DEG C, and the second supply pipe can connect It is connected to cover, corresponds to the positioning of sintering part.

Raw material processing may include：First hopper, first hopper are configured to storage as producing reduced iron The first particle of raw material and particles filled in the trolley moved below the first hopper by first；And second hopper, Second hopper is mounted in the rear class of the first hopper, and being configured to will after the first particle has been filled into trolley Second as the raw material for producing sinter is particles filled to being moved in the trolley of the second hopper.Raw material processing can To include separator, the separator be located at the side of ore discharge unit and be configured to the sinter that will be discharged from trolley and Reduced iron detaches.

Separator can detach sinter and reduced iron according to any one of granularity and magnetism.

According to another exemplary embodiment, process for preparing raw material includes：The first particle for producing reduced iron is filled out It is charged in each trolley in multiple trolleys；Second for producing sinter is particles filled in the trolley just to arrive, just The first particle is already filled in the trolley of arrival so that the second particle is located on the first particle；Make to be already filled with first Each trolley in multiple trolleys of grain and the second particle is mobile towards ignition furnace and is being filled into each of multiple trolleys Flame is lighted on the superficial layer of the second particle in trolley；Each platform in multiple trolleys that its Flame is ignited is moved successively Vehicle is burning to pass through above the multiple bellows being arranged in the Raw material processing part including sintering part and reduction part In knot point, the second particle is sintered, and reduction part is the part that after sintering part and wherein the first particle is reduced, And the reduction reaction of the sintering reaction for the second particle for being located at upside and the first particle positioned at downside is executed successively, wherein

The reduction of first particle includes：It is collected from the trolley for the reduction reaction for carrying out the first particle in restoring part first The reduction exhaust generated by reduction reaction；And by collection reduction exhaust be supplied in reduction part in trolley and Oxygen concentration in trolley in reduction part is adjusted, reducing atmosphere is thus generated in trolley.

When the reduction exhaust that will be collected is supplied in the trolley in reduction part, reduction exhaust can be fed into original Expect have the position of temperature from 800 DEG C to 1000 DEG C correspondings calmly with the top layer of the first particle in trolley in processing section The trolley of position.

In the collection to reduction exhaust, the multiple of positioning corresponding with the reduction part in Raw material processing part can be passed through Bellows collect the exhaust generated by the reduction reaction of the first particle.

May include to restoring the collection being vented：Reduction exhaust by collection and air mixing；And from multiple wind Before the exhaust that case is collected is by the air blower in the collecting path of reduction exhaust, the temperature of mixture is reduced to 500 DEG C or lower temperature.

In the sintering of the second particle, reduction exhaust can be supplied to the trolley of positioning corresponding with part is sintered, to Heat source is provided.

To sintering part supply reduction exhaust when, from outside sucking air can extraly be supplied to sintering portion The trolley for dividing corresponding positioning, is thus adjusted to 15% or more by oxygen concentration.

The piling height for being filled into the first particle in trolley can be 200mm to 400mm, including end value.

The piling height of second particle can be determined by equation 1,2 and 3.

[equation 1]

The length (mm) of Raw material processing total time (min)=multiple trolleys/trolley movement speed (m/min)

[equation 2]

The required recovery time (min) of the-the first particle of sintering time (min)=Raw material processing total time (min)

[equation 3]

The height (mm) of second particle=sintering time (min) * sintering schedule speeds (mm/min)

Process for preparing raw material may include：It is completely reduced from the first particle and trolley that the second particle is fully sintered The reduced iron that discharge is generated by the reduction of the first particle and the sinter generated by the sintering of the second particle；And going back discharge Former iron and sinter separation.

It, can be according to the granularity or magnetism of the first particle and the second particle in reduzate and the sinter separation that will be discharged To be detached.

Steel may be used as blast furnace ironmaking processing material used.

Advantageous effect

According to illustrative embodiments, the Raw material processing to process raw material can be moved successively using multiple removable trolleys Equipment produces sinter and reduced iron together.In other words, it in the raw material processing of removable trolley movement, can use Same equipment is easy to carry out by making predetermined portions be in be sintered atmosphere easy to perform and another predetermined portions is made to be in reduction Atmosphere produce sinter and reduced iron together.In addition, due to for producing reduced iron the first particle and for be sintered and Second particle of production is divided into layer and is filled into trolley, therefore with productivity and the production for improving sinter and reduced iron The effect of efficiency.

Description of the drawings

Fig. 1 is the concept map for showing raw material processing according to the first illustrative embodiments；

Fig. 2 is to show to wait for the view of state that processed raw material is filled into trolley；

Fig. 3 is the reduction exhaust supply position in the raw material processing being shown in detail according to the first illustrative embodiments The concept map set；

Fig. 4 is the concept map for showing raw material processing according to the second exemplary embodiment；

Fig. 5 is the reduction exhaust supply position being shown in detail in raw material processing according to the second exemplary embodiment The concept map set；

Fig. 6 is the measurement result figure according to the metallization rate of oxygen concentration and reduction temperature；

Fig. 7 is the chart for the metallization rate according to the temperature in the first particle heating process for showing the first particle； And

Fig. 8 is the measurement result figure of the metallization rate according to oxygen concentration and coal material (coal) content.

Specific implementation mode

Hereinafter, illustrative embodiments be will be described in.However, the present invention can be implemented in different forms, and And it should not be construed as being limited to embodiment set forth herein.On the contrary, thesing embodiments are provided so that the present invention will be It is thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Fig. 1 is the concept map for showing raw material processing according to the first illustrative embodiments.Fig. 2 be show by Wait for the view for the state that processed raw material is filled into trolley.Fig. 3 is to be shown in detail according to the first illustrative embodiments Raw material processing in reduction exhaust supply position concept map.Fig. 4 is to show according to the second illustrative embodiments Raw material processing concept map.Fig. 5 is shown in detail in raw material processing according to the second exemplary embodiment Reduction exhaust supply position concept map.

In raw material processing according to illustrative embodiments, sinter and reduced iron are produced together.Namely It says, sinter raw materials for production and reduced iron raw materials for production are filled into a trolley 100, the sintering to sinter raw materials for production Proceed to definite part, and after completing to be sintered, executes the reduction of reduced iron raw materials for production.

The sinter raw materials for production being filled into trolley 100 are by iron ore, as the coke and such as lime of heat source The auxiliary material mixing of stone etc is simultaneously then by the particle of pre-granulation.Herein, iron ore can be 10mm or smaller powder Ore, and be prepared into so that iron ore, coke and lime stone mix with water and by pre-granulation, be thus granulated into average-size It is particles of the about 2mm to about 3mm.Reduced iron raw materials for production are to mix iron ore and coal raw material and be then granulated into mixture The particle of agglomerate or pelletizing shape.Herein, for iron ore, can use be not easy to existing sinter produce in make 0.1mm or smaller superfines ores.

In the exemplary embodiment, the particle as reduced iron raw materials for production is filled into trolley 100, and at this Particle of the filling as sinter raw materials for production, thus vertically accumulates particle on particle.Therefore, hereinafter, it is filled into platform Reduced iron raw materials for production in vehicle are referred to as the first particle M1, and the sinter raw materials for production being filled on the first particle M1 are claimed For the second particle M2.

Raw material processing according to illustrative embodiments, in a trolley 100, by first to positioned at upside Second particle M2 executes sintering to produce sinter, and after the sintering for completing the second particle M2, by executing first The reduction of grain M1 produces reduced iron.

With reference to figure 1, raw material processing according to the first illustrative embodiments includes：First hopper 21, first material Bucket 21 is configured to store the furnace bottom layer ore of the bottom to be filled to trolley；Second hopper 22, second hopper 22 are configured to Storage is filled on furnace bottom layer ore M0 and as the first particle of reduced iron raw materials for production；Third hopper, the third hopper It is configured to store the second particle M2 being filled on the first particle M1 and as sinter raw materials for production；Multiple trolleys 100 are made To wait for that furnace bottom layer ore M0, the first particle M1 and the second particle M2 of processed raw material are filled into the multiple trolley respectively In 100, and the multiple trolley 100 is conveyed successively along machine process direction；Conveyer 300, the conveyer 300 are being processed Process side upwardly extends and is configured to convey multiple trolleys 100 along machine process direction；Ignition furnace 200, the ignition furnace 200 exist The side of third hopper 23 is mounted on 300 top of conveyer and is configured to flame being ejected into trolley 100；Cover 400, the cover 400 are located above conveyer 300 on the path conveyed along multiple trolleys 100 and are extended to from the side of ignition furnace 200 Machine position；Multiple bellows 500, the multiple bellows 500 are arranged in defeated on the path conveyed along multiple trolleys 100 It send 300 lower section of machine and is configured to aspirate the inside of multiple trolleys 100；And atmosphere generation unit 600, the atmosphere generate single Member 600 is connect with the multiple bellows 500 being mounted in the part of the first particle M1 of reduction in multiple bellows 500, and by structure It causes to collect the gas (hereinafter referred to as reduction exhaust) generated in the reduction process of the first particle M1 and supplies the gas Body, to be used further to the first particle M1 that reduction is again positioned in reduction part.

In addition, raw material processing includes：Iron ore and coal material are mixed and will mixing by comminutor 11, the comminutor 11 Object is granulated into pelletizing or agglomerate, to the first particle of production；Mixer 12, the mixer 12 is by iron ore, coke, auxiliary material (lime stone) and water mix and are in advance granulated mixture；In exhaust unit 700, the exhaust unit 700 and multiple bellows 500 The multiple bellows 500 accordingly installed with the sintering part of the second particle M2 connect, and are discharged in the sintered of the second particle M2 The gas generated in journey；Ore discharge unit, the ore discharge unit be located at the side of conveyer 300 and sinter and reduced iron from Trolley 100 is expelled to ore discharge unit；Sinter and reduced iron to discharge carry out cooling cooler 800；And it will cool down Sinter and reduced iron separation separator.

Ignition furnace 200 towards thereunder by trolley jet flames and provide for combustion of coke heat source.In addition, When a trolley below ignition furnace by when, flame is injected into the superficial layer of the second particle in trolley.According to exemplary The ignition furnace 200 of embodiment is gas burner, and but not limited to this, can use the various devices for capableing of jet flames.

Cover 400 is to draw outside air into trolley, the air being drawn into trolley is aspirated and pacified again Dress up the device extended between ignition furnace 200 and ore discharge unit.

Multiple bellows 500 provide suction to cover 400 and trolley 100, and allow air to be inhaled into cover 400 and allow The air being inhaled into is moved down from trolley 100.Such multiple bellows 500 can be each other in being disposed linearly at ignition furnace Between 200 and ore discharge unit.

Ignition furnace 200 is located between 400 (or first bellows) of third hopper 23 and cover, and direction wherein furnace bottom layer ore 100 jet flames of trolley that M0, the first particle M1 and the second particle M2 are sequentially accumulated.That is, flame is injected into The lower section of ignition furnace 200 by trolley 100 in raw material layer upper surface.When jet flames such from ignition furnace, flame point Fire the top layer of the second particle M2, that is, superficial layer so that the heat caused by flame, the air and second being drawn into trolley 100 Coke in particle M2 meets.In addition, the region of flame periphery is heated to 1300 DEG C to 1400 DEG C, and when lime stone assists When raw material and iron ore form low-melting compound and partial melting, the sintering reaction of iron ore is carried out.In addition, passing through conveying When machine 300 conveys a trolley 100 along machine process direction, trolley 100 is successively each other in being disposed linearly at machine process 500 top of multiple bellows on path passes through.Therefore, generated heat and from cover on the superficial layer of flame or the second particle M2 The air of 400 supplies is moved down in the carrier by the suction of bellows 500, and causes the second of the downside for being present in trolley The coke of particle M2 burns.Therefore, as flame and heat are moved down from the superficial layer of the second particle M2, sintering reaction gradually from The superficial layer of second particle M2 carries out downwards.

While so carrying out the sintering of the second particle M2, be located at the first particle M1 below the second particle M2 receive from The heat of upside transmission is simultaneously heated.In addition, as described above, when the second particle M2 makes flame be moved from the superficial layer of the second particle M2 When to bottom side, it is sintered.Flame and heat are completed to be sintered more down by downside, or more toward the lower layer of the second particle M2, the The temperature of one particle M1 is higher.

At this point, the carbon and iron ore in coal material (coal) contained in the first particle react, and reduction reaction occurs (reaction equation 1 and 2).In addition, the CO gases generated at this time generate heat (reaction equation 4) so that iron oxide is reduced (reaction equation 3) Or it spreads to outside and is reacted with the oxygen of surrounding.

Reaction equation 1) Fe₂O₃+ 3C=2Fe+3/2CO₂

Reaction equation 2) Fe₂O₃+ C=2FeO+CO

Reaction equation 3) FeO+CO=Fe+CO₂

Reaction equation 4) CO+1/2O2=CO2

Meanwhile in order to improve the first particle M1 in trolley reduction reaction efficiency (rate of reduction or metallization speed Rate), the management of the oxygen concentration in trolley 100 is important.Fig. 6 is the metallization rate according to oxygen concentration and reduction temperature Measurement result figure, it is found that oxygen concentration becomes smaller from 21%, and metallization rate more dramatically increases.In addition, when oxygen concentration is super When 10%, the coal material (that is, coal) in the first particle M1 is burned, and the temperature of the first particle M1 steeply rises, at this time Observe the coal material for having used and should being all initially used for reduction of iron ore.In addition, under 1300 DEG C of reduction temperature, observe The problem of first particle M1 melts, it is thus understood that, need the temperature was then adjusted to 1300 DEG C or less to restore One particle M1.Fig. 7 shows the metallization rate according to the temperature in the heating process of the first particle M1, and can manage Solution, at low temperature, the reduction reaction rate of iron ore is very slow and the rate that metallizes is very low, and at 800 DEG C or more Gao Shi, the rate that metallizes are increased speed quickly.

Therefore, in order to improve the rate of reduction of the first particle M1, it is to be understood that should be according to 800 DEG C or higher Oxygen concentration in trolley is adjusted to 10% or smaller by temperature, and the rate that metallizes at said temperatures increases.That is, when the When the temperature of one particle M1 is increased to 800 DEG C or higher, the oxygen concentration in trolley should be adjusted to 10% or smaller, non-to generate Oxidation or reducing atmosphere.

Fig. 8 is the measurement result figure of the metallization rate according to oxygen concentration and coal material (coal) content, in order to improve first The rate of reduction of particle M1, the coal content being preferably added are 5wt% to 20wt%, including end value.When coal content is more than When 20wt%, increase the not sufficiently effective of metallization rate.

Meanwhile as described above, the flame and heat lighted on the second particle M2 move down, and it is closer to be sintered process The bottom of second particle M2, the further raising of temperature of the first particle M1.At this point, the first particle M1 with the second particle M2 The temperature of adjacent top layer also increases.

As described above, when being nearly completed from sintering to the lowest level of the second particle M1, or when being near completion, first should be started The reduction of particle M1.When sintering is nearly completed to the lowest level of the second particle M2, and works as and measure the most lower of the first particle M1 When the temperature of layer, temperature can be any temperature from 800 DEG C to 1000 DEG C.

Therefore, in the illustrative embodiments, it is 800 DEG C to 1000 DEG C from the temperature of the top layer of the first particle M1 and appoints Oxygen atmosphere is adjusted to 10% or smaller by the trolley position of one temperature.

Simultaneously as oxygen be used for restore the first particle M1, therefore oxygen concentration relatively low (at least below air) and Temperature is also higher.Therefore, in the illustrative embodiments, the reduction generated in the reduction process of the first particle M1 is vented quilt It collects and is used again to the first particle M1 of reduction, to provide heat source and generate nonoxidizing atmosphere.

For this purpose, in the illustrative embodiments, atmosphere generation unit 600 from the temperature of the first particle M1 be 800 DEG C to The trolley position of 1000 DEG C of any temperature is vented to the supply reduction of trolley 100 being processed while trolley 100 moves, Thus oxygen concentration is adjusted to 10% or smaller.Herein, reduction exhaust is from the platform that wherein the first particle M1 has been restored The gas that vehicle generates, and atmosphere generation unit 600 collects and reduction is recycled to be vented, thus by the oxygen concentration in trolley 100 It is adjusted to be reduced to 10% or smaller.

More specifically, in the illustrative embodiments, by using atmosphere generation unit 600, sintering reaction proceeds to The lowest level of second particle M2, and sintering reaction does not occur, but allow that reduction reaction occurs in the first particle M1.In other words It says, the flame lighted on the superficial layer of the second particle M2 will not be moved to the first particle M1 but disappear before the movement, and First particle M1 is reduced under non-burning or nonoxidizing atmosphere.That is, when sintering is accomplished to the most lower of the second particle M2 When layer, sintering reaction stops, and causes reduction reaction.

For this purpose, in a mobile trolley 100, it means that sintering be accomplished to the second particle M2 lowest level it Afterwards, flame cannot be kept in the part that trolley 100 moves, and should generate non-oxide or reducing atmosphere.

In the exemplary embodiment, as described above, be initially supplied reduction exhaust position according to the first particle M1 most The temperature on upper layer determines.This is because the flame lighted on the superficial layer of the second particle M2 moves gradually downward, and more Position, the further raising of temperature of the top layer of the second particle M2 are completed close to sintering.In the exemplary embodiment, also Original exhaust is supplied at the position that the temperature of the top layer of the first particle M1 is 800 DEG C to 1000 DEG C.For example, working as ignition furnace When the position that the location of 200 be 0% position and the position of final stage bellows 500 is 100%, the first particle M1's is most upper The temperature of layer be 800 DEG C to 1000 DEG C of position can be 40% position to 50% in machine process part position it Between any position.In this case, when trolley 100 on the move is located at 40% position in machine process part extremely When 50% position (reduction exhaust supply position), reduction exhaust is supplied to so that dense by the oxygen inside the trolley of the position Thus degree carries out the reduction of the first particle M1 10% or smaller and to generate reducing atmosphere.In addition, due to multiple trolleys 100 Reduction exhaust supply position is passed sequentially through, therefore the inside of multiple trolleys 100 becomes non-oxide or reducing atmosphere successively, and carried out Reduction.

Another atmosphere generation unit according to first embodiment is detailed below.

As described above, extraneous air is drawn into multiple trolleys 100 via cover 400 under the action of the suction of bellows 500 In each trolley in.In addition, air contains a concentration of 21% oxygen.Meanwhile the position of the sintering completion from the second particle M2 It is the reduction part that the first particle M1 should be reduced to complete position (100% position) to Raw material processing.In restoring part Trolley should be configured in reducing atmosphere, but the air that oxygen concentration is 21% cannot generate reducing atmosphere.

Therefore, in the illustrative embodiments, reduction exhaust is supplied to reduction part, and by restoring part Trolley 100 is internally configured in reducing atmosphere.That is, atmosphere generation unit 600 according to illustrative embodiments connects To the cover 400 of sucking extraneous air, thus the reduction in nonoxidizing atmosphere is configured at least through the trolley of reduction part Atmosphere.More specifically, the supply of atmosphere generation unit 600 reduction is vented and the oxygen concentration in trolley 100 is made to be 10% or smaller. This can be realized by adjusting the flow for the reduction exhaust for being supplied to cover 400.

Atmosphere generation unit 600 according to the first illustrative embodiments uses reduction exhaust so that by restoring part Trolley 100 is in reducing atmosphere, and atmosphere generation unit 600 according to the second exemplary embodiment is made using reduction exhaust The sintering that must be sintered is partially in sintering atmosphere easy to perform, and so that the atmosphere of reduction part is become reduction and be easy to carry out Atmosphere.

With reference to figure 1 and Fig. 3, atmosphere generation unit 600 according to the first illustrative embodiments includes：Pipeloop 610, One end of the pipeloop 610 is connected to multiple bellows 500, and the other end is connected to cover 400, and the pipeloop 610 are configured to collect the exhaust from being discharged by restoring the trolley 100 of part；Air blower (hereinafter referred to as the first air blast Machine), which is mounted on the path of pipeloop 610 and is configured to provide suction, which makes multiple inner bellows Reduction exhaust be inhaled into or be moved to pipeloop 610；Dust arrester (the first dust arrester 620), which, which is installed in, follows On endless tube line 610, so as on the path of pipeloop 610 between bellows 500 and the first air blower 630, and by structure It causes to collect the dust that the reduction being discharged since bellows 500 is vented；And temperature regulation section 640, the temperature regulation section 640 peace It dresses up and is connected to pipeloop 610, between the first dust arrester 620 and the first air blower 630, and be configured to suck and supply To extraneous air, to play the role of reducing the temperature of reduction exhaust.

Pipeloop 610 collects the reduction exhaust collected from reduction part, and gas is supplied again to and passes through reduction Partial trolley 100, to make trolley 100 be in reducing atmosphere.At this point, when the first particle M1 top layer temperature be from When the position of 800 DEG C to 1000 DEG C of any temperature is reduction exhaust supply position, and when mobile trolley 100 is located at reduction When being vented supply position, the oxygen concentration in trolley 100 be vented by reduction supply from pipeloop 610 be adjusted to 10% or Smaller.For example, when the position that the temperature of the top layer of the first particle M1 is any temperature from 800 DEG C to 1000 DEG C is entire The trolley 100 of any position in the position to 50% position from 40% and movement in machine process part is located at any When reduction exhaust supply position, and when mobile trolley 100 is located at any position of the position from 40% position to 50% When, the oxygen concentration in trolley 100 is adjusted to 10% or smaller by the reduction exhaust supplied from pipeloop 610.

At this point, reduction exhaust passes through the suction of the bellows 500 for 610 lower section of pipeloop for being correspondingly situated at discharge reduction exhaust Power and be inhaled into below the pipeloop 610 by trolley 100 in, and the inside of trolley 100 is formed also Primordial Qi Atmosphere.

Pipeloop 610 includes：One end of collecting pipe 611, the collecting pipe 611 is connected to multiple bellows 500, another End is mounted to extend to the upside of bellows 500, and the collecting pipe 611 is configured to the reduction that will be discharged from multiple bellows 500 Exhaust is moved to the upside of bellows 500；And supply pipe (hereinafter referred to as the first supply pipe 612), one of the supply pipe End is connect with collecting pipe 611, and the other end 400 is connect with cover, and supply pipe is configured to supply and be collected from collecting pipe 611 Reduction exhaust.Herein, the first supply pipe 612 400 connect with cover, with the temperature of the top layer with the first particle for from 800 DEG C to The position of 1000 DEG C of any temperature corresponds to.For example, the position that the temperature for working as the top layer of the first particle M1 is 800 DEG C to 1000 DEG C It sets when can be any position between 40% position of the position to 50% in machine process part, the first supply pipe 612 can be connected to cover 400, so as to corresponding to any in the position to 50% position from 40% in machine process part Position.

Meanwhile extraneous air and reduction exhaust are supplied to and are mounted to extend between ignition furnace 200 and ore discharge unit Cover 400.In addition, cover 400 some regions be region corresponding with the sintering part of the second particle M2, and other regions be with The corresponding region in reduction part of first particle M1.

However, when reduction exhaust is supplied to reduction exhaust supply position, reduction exhaust may diffuse to sintering portion Point.Moreover, on the contrary, sintering part is configured in the oxidizing atmosphere that oxygen concentration is 15% or bigger, which can be with Diffuse to reduction part.Therefore, it is according to illustrative embodiments cover 400 inside, partition wall 410 be mounted on sintering part with Between reduction part.At this point, partition wall 410 is mounted to, positioned at the rear of the first supply pipe 612, be preferably positioned to supply with first It is adjacent to pipe.

The removal of first dust arrester 620 is included in the collected dust restored in exhaust and dust is moved to the first air blast Machine 630.For this purpose, the first dust arrester 620 is connected to collecting pipe 611, between bellows 500 and the first air blower 630.

First air blower 630 provides suction to collecting pipe 611, and is installed into and is connected to collecting pipe 611, is connected to the At the rear class of one dust arrester 620.

Meanwhile the reduction exhaust being discharged from bellows 500 can have 500 DEG C or lower temperature, and more specifically have There is about 700 DEG C of temperature.In addition, in general, air blower is manufactured by using weak material under 500 DEG C or higher temperature. Therefore, before the reduction exhaust for being collected into collecting pipe 611 is by the first air blower 630, need the temperature that will restore exhaust cold But to 500 DEG C or lower temperature.

Therefore, in the present invention, it is connected with temperature regulation section 640,640 company of supplying external air to of temperature regulation section It is connected to the collecting pipe 611 of the prime of the first air blower 630 and supplies reduction exhaust.Temperature according to illustrative embodiments is adjusted Portion 640 includes：First sucting 641, the first sucting 641 are configured to sucking extraneous air；And first suction line 642, One end of the first suction line 642 is connect with the first sucting 641, and the other end with positioned at the first dust arrester 620 and the Collecting pipe 611 between one air blower 630 connects.In temperature regulation section 640 according to illustrative embodiments, reduction exhaust Temperature can be adjusted by the flow for adjusting supply to the air of collecting pipe 611.

It can be used for restore exhaust according to the atmosphere generation unit 600 of second embodiment and be fed not only to reduction portion Point, and it is also fed to sintering part, to provide heat source, and form sintering atmosphere easy to perform.

Include according to the atmosphere generation unit 600 of second embodiment：Pipeloop 610, an end of pipeloop 610 Portion is connected to each bellows in multiple bellows 500, and the other end is connected to cover 400, and pipeloop 610 is constructed At the exhaust collected from the discharge of trolley 100 by restoring part；First air blower 630, the first air blower 630 are mounted on cycle On the path of pipeline 610 and be configured to provide suction, the suction make multiple inner bellows reduction be vented be inhaled into or It is moved to pipeloop 610；First dust arrester 620, the first dust arrester 620 are installed on pipeloop 610, to recycle On the path of pipeline 610 between bellows 500 and the first air blower 630, and the first dust arrester 620 is configured to collect and Dust in the reduction exhaust that bellows 500 are discharged；Temperature regulation section 640, the temperature regulation section 640 be mounted to positioned at the Pipeloop 610 between one dust arrester 620 and the first air blower 630 connects, and is configured to suck and supply extraneous air, To play the role of reducing the temperature of reduction exhaust；And concentration adjustment portion 650, the concentration adjustment portion 650 are configured to control System is supplied to the oxygen concentration of the gas of sintering part.

In this way, pipeloop 610 according to the second exemplary embodiment also wraps compared with the first illustrative embodiments Include the second supply pipe 613.That is, pipeloop 610 includes：Collecting pipe 611, the end connection of the collecting pipe 611 To multiple bellows 500, and the other end is mounted to extend to the upside of bellows 500, and collecting pipe 611 is configured to make from multiple The reduction exhaust that bellows 500 are discharged is moved to the upside of bellows 500；And first supply pipe 612, first supply pipe 612 One end is connected to collecting pipe 611 and the other end is connected to the position corresponding with reduction part of cover 400；And second One end of supply pipe 613, second supply pipe 613 be connected to collecting pipe 611 and the other end be connected to cover 400 with burning The corresponding position of knot point.Herein, the first supply pipe 612 is connected to cover 400, with the temperature of the top layer corresponding to the first particle M1 It spends in the position of 800 DEG C to 1000 DEG C of any temperature.Furthermore it is preferred that the second supply pipe 613 is connected to the second particle M2's It is sintered starting position, that is, connect into positioned at the upside of the first bellows 500.

Meanwhile in order to be sintered the second particle M2, the trolley by being sintered part should maintain the oxygen concentration in trolley 100 15% or bigger.However, since the oxygen concentration of reduction exhaust is 7% to 8%, so being aspirated by the suction of bellows 500 When reduction exhaust and extraneous air, oxygen used for combustion is insufficient, and the thus sintering of the second particle M2 may become difficult.Cause This, when supply reduction exhaust is to provide heat source, and when the oxygen concentration of 15% or bigger is not easy only by being inhaled by bellows 500 When the extraneous air entered obtains, oxygen is supplied to the second supply pipe 613 by concentration adjustment portion 600, thus adjusts oxygen concentration For 15% or bigger.Concentration adjustment portion 650 includes：Second sucting 651, the second sucting 651 are configured to suck external sky Gas；And second suction line 652, an end of the second suction line 652 are connect with the second sucting 651, and the other end with Second supply pipe 613 connects.

Exhaust unit 700 collects the exhaust from sintering portion collection and is discharged to outside.According to exemplary embodiment party The exhaust unit 700 of formula includes：One end of exhaust line 710, exhaust line 710 is connected to and is sintered part correspondingly Multiple bellows of installation；Second dust arrester 720, the second dust arrester 720 is mounted on the extension path of exhaust line 710 and structure It causes to remove dust from exhaust；And second air blower 730, the second air blower 730 are connected to the rear class of the second dust arrester simultaneously And it is configured to provide suction to exhaust line 710.

Cooler 800 is to carry out cooling device to the sinter and reduced iron that are discharged from trolley 100, and show according to this The cooler of example is cooled down using air.Certainly, cooling means is not limited to air, but can use do not influence sinter and The various media of the characteristic of reduced iron.

Separator 900 is the device for detaching cooling sinter and reduced iron, and for example can be according to grain Spend the sieve detached and any one of the magnetic separator detached according to magnetic force.Since sinter is bigger than reduced iron Tens times, to hundred times, therefore can be classified according to granularity to detach sinter by using the sieve with multiple openings And reduced iron.In addition, according to the reduction of the first particle M1, reduced iron is metallized into metal Fe, and metal Fe has magnetism. However, sinter has the shape of iron oxide (FeO), therefore without magnetic or very slight magnetism.Therefore, by using Magnetic separator with magnet etc. can detach sinter and reduced iron according to magnetism.

It will be described below the height h1 and h2 of the first particle M1 and the second particle M2.

In the exemplary embodiment, as described above, the first particle M1 and the second particle M2 be filled into trolley 100 with Reduced iron is manufactured, and is filled while layering so that the second particle M2 is located on the first particle M1.In addition, working as trolley It when mobile, is sintered to bottom from the top layer of the second particle M2, is then carried out from the top layer of the first particle M1 to bottom Reduction.Therefore, the reduction part of the first particle M1 and the sintering part of the second particle M2 are according to the first particle M1 and the second particle The height h1 and h2 of M2 is determined.

In order to find out required process time according to the height of the first particle, following experiment is carried out.

When the piling height of the first particle M1 is set as 300mm, the temperature of the first particle M1 is increased to reduction temperature Time (recovery time) and reduction needed for degree required time (heating time), reduction complete the time needed for postcooling in total Need about 15 minutes.Wherein, confirm that the time restored is about 8 minutes, and when piling height changes, the recovery time is real Do not change in matter.Furthermore, it is to be understood that when the height of the first particle M1 is set as 200mm, it is about to restore the required time 8 minutes, and whole process needs 10 minutes.In another example, when the height of the first particle M1 is configured to be less than 200mm When, the recovery time there is no variation compared with 8 minutes, and therefore, entire process time there is no compared with 10 minutes Variation.However, the productivity due to reduced iron reduces, it is undesirable.

In another example, when the height of the first particle M1 is set to 400mm, confirm that entire process time is 20 points Clock, and when height is more than 400mm, process time becomes too long, and accordingly, there exist the limitations that productivity declines.In addition, When the height of the first particle M1 is more than 400mm, there are the limits that relatively large deviation occurs for the rate of reduction of the first particle M1 and intensity System.

Therefore, in the exemplary embodiment, the piling height of the first particle M1 is set to 200mm to 400mm, including End value.

In addition, executing reduction so that the height of the first particle is set as 300mm, and it is 10% and temperature to introduce oxygen concentration The gas that degree is 700 DEG C.After reduction reaction, the oxygen concentration in reduction exhaust is measured.In the measurement results, with introduce gas Oxygen concentration is compared, and oxygen concentration reduces 3% to 5%, and restores the temperature of the exhaust base compared with 700 DEG C of temperature for introducing gas Do not change in sheet.Although this is because usually reduce the temperature of exhaust by using the gas of introducing heating filler, But when the CO gases generated from the first particle M1 burn, use oxygen so that oxygen concentration reduces and gas temperature is because at this time The heat of generation and increase.

The height of the second particle is determined according to the height of the first particle, sintering progression rates etc..

During the total time of Raw material processing process, it can be calculated by following equation (1) according to the height of the first particle The height of second particle.In raw material processing, Raw material processing total time, (min) was according to processing length (m) and movement speed (m/min) change.Herein, processing length (m) refers to the length (m) of the multiple trolleys arranged on machine process direction.Cause This, Raw material processing total time (min) is expressed as following by the length (m) of multiple trolleys and the movement speed (m/min) of trolley Equation (1).

The length (mm) of [equation 1] Raw material processing total time (min)=multiple trolleys/trolley movement speed (m/min)

In equation 1, the time that can be used in being sintered the second particle can be by the Raw material processing that is determined by above equation 1 It total time and is determined by equation 2 according to the highly desired recovery time (min) of the first particle.

The required recovery time of the-the first particle of [equation 2] sintering time (min)=Raw material processing total time (min) (min)

In addition, when determining sintering time (min) according to equation 2, it is contemplated that produce required productivity and quality is come really Surely it is sintered schedule speed, and height (mm) (etc. of the second particle can be obtained by sintering time and sintering schedule speed Formula 3).

The height (mm) of [equation 3] second particle=sintering time (min) * sintering schedule speeds (mm/min)

In this way, when determining the piling height of the first particle and the second particle, the first particle and during Raw material processing Two particles are filled into trolley until reaching the height having determined, and execute the process.

Hereinafter, referring to figs. 1 to Fig. 4, by the operation for describing raw material processing according to illustrative embodiments with And the method using raw material processing production sinter and reduced iron.

As described above, in the illustrative embodiments, when the temperature of the top layer of the first particle M1 be from 800 DEG C to When 1000 DEG C of any temperature, or when the position of trolley is for instance in 40% position in entire processing section to 50% Position when, supply reduction exhaust.

Hereinafter, following situations will be described as example：The temperature of the top layer of first particle M1 is 900 DEG C, supply Reduction exhaust, and the temperature of top layer is the position that 900 DEG C of position is, for example, 45%.

First, the first particle M1 for manufacturing reduced iron, the second particle M2 and stove for manufacturing sinter are prepared Bottom ore Mo.

Herein, the first particle M1 is the raw material for manufacturing reduced iron, and is prepared into so that 0.1mm or smaller is super Fine iron ore and 0.1mm or smaller coals as coal material are produced and with 80:The particle of 20 weight ratio mixing, then Mixture is granulated by the agglomerate that size is long 45mm, width 23mm, thickness 17mm by using double roller type agglomerate comminutor.Certainly, First particle M1 can be made for pelletizing by using granulator.

Second particle M2 is the raw material for manufacturing sinter, and is so that iron ore, the powder coke as binder Charcoal, the particle for assisting lime stone (CaCO3) and water to mix in a mixer and preparing, and mixture is pre-granulated into averagely Granularity is the particle of 2mm to 3mm.

Furnace bottom layer ore M0 is that the granularity in manufactured sinter is the sinter of 2mm to 3mm and is not used in blast furnace In operation, and used for filling next time as furnace bottom layer ore during Raw material processing.Furnace bottom layer is played to be added in raw material Make the effect of the airflow smooth in trolley during work, and protects the trolley formed by iron material in iron ore melting.

When preparing above-mentioned furnace bottom layer ore M0, the first particle M1 and the second particle M2, they are filled into respectively In one hopper 21, the second hopper 22 and third hopper 23.In addition, multiple trolleys are moved to the first hopper 21, the second hopper successively 22 and third hopper 23 lower section, and furnace bottom layer ore M0, the first particle M1 and the second particle M2 are sequentially filled out respectively with this It is charged in trolley and is deposited in trolley.At this point, the piling height of the first particle M1 is set to 200mm to 400mm, including end Value.In addition, when by considering the piling height of the first particle M1 and producing productivity and the quality of required sinter come really When being sintered schedule speed surely, the piling height of the second particle M2 is counted according to the piling height for the first particle M1 having determined It calculates.Second particle M2 is filled on the first particle M1 and is stacked on the first particle M1 with calculated height.

Then, each trolley in multiple trolleys 100 is passed through below ignition furnace 200 by conveyer 300 successively, And the trolley that flame is ejected into is located at the first bellows, and flame is lighted on the superficial layer of the second particle M2.Its Flame quilt The trolley 100 lighted is moved along the extending direction of conveyer between cover 400 and bellows 500 according to the movement of conveyer 300. At this point, extraneous air is inhaled into cover 400 by the suction of multiple bellows 500 and is fed into trolley 100.Due to sky Oxygen concentration in gas is 21% or smaller, therefore the inside of trolley 100 can be maintained to coke and be easy to burn and be sintered appearance The oxygen concentration easily carried out.

When flame lighted in trolley 100 and trolley movement between cover 400 and bellows 500 pass through when, flame by Gradually move down.At this point, on the position of the flame periphery moved down, the coke in the second particle M2 is burned, and iron Ore raw materials is sintered due to the heat of burning.In addition, as a trolley 100 is moved along machine process direction, from second The superficial layer of particle M2 is sintered downwards.In addition, as described above, in multiple trolleys each trolley movement while, Sintering is lasting to be carried out.

Meanwhile when at 45% position that mobile trolley 100 is located in entire processing section, sintering is accomplished to second The lowest level of particle, and flame extinction.But flame survival be because oxygen concentration be maintained at 15% or more up to 45% position Set and coke can burn, flame extinction be because position of the oxygen concentration from 45% adjust to 10% or less and oxygen become It is insufficient.Therefore, the second particle being moved in the trolley of 45% position is fully sintered and becomes sinter.

In addition, when reduction part of the trolley movement by the position from 45% position to 100%, the first particle is gone back It is former.At this point, reduction part constructs by the reduction generated in the reduction process in the first particle previously restored is vented At in reducing atmosphere.That is, when the first air blower 630 of atmosphere generation unit 600 is run during reduction process, Reduction exhaust is discharged from the bellows corresponding to the setting of reduction part.The reduction exhaust being discharged from bellows 500 passes through the first dust arrester 620, thus dust therein be removed.In addition, reduction exhaust is mixed with the air supplied from temperature regulation section 640, to quilt It is adjusted to 500 DEG C or lower temperature.Then, temperature is adjusted to 500 DEG C or lower reduction exhaust is moved along collecting pipe 611 It is dynamic, cover 400 is then supplied to by the first supply pipe 612.Herein, the first supply pipe 612 is correspondingly mounted to be located at first The temperature of the top layer of grain M1 at 900 DEG C of 45% position, and supplies reduction exhaust in entire processing section.

Therefore, when mobile trolley 100 is located at 45% position, the reduction being discharged from the first supply pipe 612 is vented quilt It is drawn into trolley, and extraneous air is inhaled into via cover in trolley 100 by the suction of bellows 500.At this point, passing through first The flow for the reduction exhaust that supply pipe 612 supplies is conditioned, and thus, it is possible to the oxygen concentration in trolley is adjusted to 10% or smaller.

Substantially, extraneous air is sucked into via cover 400 in trolley 100 by multiple bellows 500, when trolley passes through When 45% position, the reduction exhaust that oxygen concentration is 8% is supplied to by the first supply pipe 612.Therefore, the platform in part is restored Vehicle 100 has the atmosphere by being formed from the external air sucked and reduction exhaust, at this point, the confession being vented due to having adjusted reduction To amount, therefore, oxygen concentration can be adjusted to 10% or smaller, and therefore, the atmosphere inside trolley 10 can be made for be in Reducing atmosphere or nonoxidizing atmosphere.

In addition, reduction exhaust is with 500 DEG C or lower high temperature and supplies reduction exhaust, it is possible thereby to be in addition used for It restores the first particle and supplements the heat of insufficient heat.

In this way, when each trolley in multiple trolleys is by being going back in reducing atmosphere by the control of atmosphere generation unit When former part and the position of arrival 100%, the reduction of the first particle is completed and generates reduced iron.

The reduced iron and sinter produced in this way is used as the raw material of blast furnace ironmaking processing.

In the preceding description it has been described that being vented using reduction by raw material processing according to first embodiment Atmosphere is generated in restoring part.However, embodiment is without being limited thereto, but as in the second exemplary embodiment, Atmosphere in sintering part can be generated by using reduction exhaust.In other words, it is vented edge from the reduction of reduction portion collection The movement of collecting pipe 611, a part for exhaust is restored by the first supply pipe 612 supply extremely reduction part, restores the one of exhaust Part is supplied to sintering part via the second supply pipe 613.Reduction exhaust is supplied to sintering part from the second supply pipe 613, makes In addition heat source can be obtained by obtaining, so as to solve the problems, such as hot deficiency.However, due to the use of reduction exhaust and by bellows 500 The air of suction sucking, therefore be likely difficult to because of low oxygen concentration to execute sintering.Therefore, concentration adjustment portion is connected to the second confession To pipe 613, and air extraly supplies together with reduction exhaust, and the oxygen concentration being thus sintered in part is maintained at 15% or more Greatly.

When by processing production sinter completely and reduced iron as described above, sinter and reduced iron are filled into cold But in device and cooling.In addition, sinter after cooling and reduced iron are filled into separator, be then separated into sinter and Then reduced iron is moved to execute processing.

Similarly, it in the illustrative embodiments, can be moved successively to process raw material using multiple removable trolleys Raw material processing produce sinter and reduced iron together.That is, the Raw material processing in removable trolley movement is set In standby, identical equipment can be used by making predetermined portions be in sintering atmosphere easy to perform and making at another predetermined portions Sinter and reduced iron are produced together in restoring atmosphere easy to perform.In addition, due to first for producing reduced iron Grain and the second particle for being sintered and producing are divided into layer and are filled into trolley, therefore with raising sinter and reduced iron Productivity and production efficiency effect.

Industrial feasibility

According to raw material processing and using the raw material processing process for preparing raw material, multiple removable trolleys according to While secondary mobile, can sinter and reduced iron be produced by using raw material processing together.In other words, removable In the raw material processing of trolley movement, same equipment can be used to be sintered atmosphere easy to perform by making predetermined portions be in And so that another predetermined portions is in and restore atmosphere easy to perform to produce sinter and reduced iron together.In addition, due to being used for It produces the first particle of reduced iron and the second particle for being sintered and producing is divided into layer and is filled into trolley, therefore have Improve sinter and the productivity of reduced iron and the effect of production efficiency.

Claims

1. a kind of raw material processing, including：

Multiple trolleys are filled with the first particle and the second particle in each trolley, and first particle is for producing reduced iron Raw material, second particle be the raw material for producing sinter and fill to be located at first particle, the trolley It can be moved to Raw material processing part, the Raw material processing part includes the sintering part and use for being sintered second particle In the reduction part for restoring first particle, the reduction part is located at the sintering part rear；

Ignition furnace, the ignition furnace are mounted on and the multiple trolley are moved on the path along the Raw material processing part, And it is configured to the superficial layer jet flames towards second particle；

Multiple bellows, under the multiple bellows are arranged in the multiple trolley in the multiple trolley movement direction Side, and be configured to each trolley into the multiple trolley and suction is provided；And

Atmosphere generation unit, the atmosphere generation unit are located in the reduction part and include pipeloop, the cycle Pipeline is used to collect from the trolley of wherein described first particle reduction restores exhaust caused by reduction reaction, and the cycle The reduction exhaust supply is extremely located at the trolley in the reduction part by pipeline.

2. raw material processing according to claim 1, wherein the pipeloop includes：

It is connected to an end of the multiple bellows accordingly positioned with the reduction part in the Raw material processing part；With And

Be positioned to the temperature of the top layer of the first particle in the trolley in the Raw material processing part be 800 DEG C extremely 1000 DEG C corresponding the other end in position,

The pipeloop supplies the reduction exhaust.

3. raw material processing according to claim 2, wherein on the path along trolley movement, when from institute When the part for the position that the reduction for stating ignition furnace to first particle is completed is defined as entire Raw material processing part,

The reduction part of first particle is from the pipeloop to the position and described for supplying the reduction exhaust The part for the position that the reduction of first particle is completed, and

The sintering part of second particle is the part from the ignition furnace to the position for supplying the reduction exhaust, In,

Oxygen concentration in the reduction part is adjusted to 10% or smaller, and the sintering by supplying the reduction exhaust Oxygen concentration in part is adjusted to 15% or more.

4. raw material processing according to claim 3, wherein the pipeloop includes：

Collecting pipe, the collecting pipe include the multiple wind being correspondingly arranged with the reduction part being connected in the multiple bellows One end of case, and the collecting pipe is configured to collect described first from multiple trolleys on the reduction part The reduction exhaust generated during the reduction reaction of particle；And

First supply pipe, first supply pipe include being connected to an end of the collecting pipe, and described first supplies Pipe is configured to the reduction exhaust removed from the collecting pipe to the trolley supply on the reduction part, wherein

First supply pipe is mounted to and the top layer of the first particle in the trolley in the Raw material processing part The position that temperature is 800 DEG C to 1000 DEG C corresponds to.

5. raw material processing according to claim 4, wherein the atmosphere generation unit includes：

Air blower, the air blower are mounted on the extension path of the collecting pipe to be connected to the collecting pipe, and institute Blast mechanism is stated to cause to provide suction to the collecting pipe；And

Temperature regulation section, the temperature regulation section are mounted to be connected to the collection between the bellows and the air blower Pipe, and the temperature regulation section is configured to supply extraneous air to the collecting pipe, thus passes through the air blower in gas The temperature for being collected into the gas in the collecting pipe is reduced before.

6. raw material processing according to claim 4, wherein the atmosphere generation unit includes：

Second supply pipe, second supply pipe include being connected to an end of the collecting pipe and on the trolley Side and the other end corresponding with the sintering part, and second supply pipe is configured to sintering part for discharge Thus gas provides heat source to sintering part；And

Concentration adjustment portion, the concentration adjustment portion are connected to second supply pipe and are configured to supply air to described Two supply pipes, to which the oxygen concentration in the sintering part is adjusted to 15% or higher.

7. raw material processing according to claim 6, including：

Ore discharge unit, the ore discharge unit are located at the side of the end of the Raw material processing part, wherein described second The reduced iron that the fully sintered sinter of grain and first particle restore completely is discharged into the ore discharge unit；And

Cover between the ignition furnace and the ore discharge unit, wherein described the other end of the pipeloop connects It is connected to the cover, positioning corresponding with the position that the temperature of the top layer of first particle is 800 DEG C to 1000 DEG C, and described Second supply pipe is connected to the cover, corresponds to the positioning of sintering part.

8. raw material processing according to claim 7, including：

First hopper, first hopper be configured to storage as the raw material for producing reduced iron first particle and It is particles filled in the trolley moved below first hopper by described first；And

Second hopper, second hopper is mounted in the rear class of first hopper, and is configured in first particle It will be particles filled to being moved to as described second of the raw material for producing sinter after having been filled in the trolley In the trolley of second hopper.

9. raw material processing according to claim 8, including separator, the separator is located at ore row Go out the side in portion and is configured to detach in the sinter and reduced iron that are discharged from the trolley.

10. raw material processing according to claim 9, wherein the separator is according to appointing in granularity and magnetism One detaches the sinter and the reduced iron.

11. a kind of process for preparing raw material, including：

It will be in the particles filled each trolley in multiple trolleys of first for producing reduced iron；

Second for producing sinter is particles filled in the trolley just to arrive, it is had been filled in the trolley just to arrive There is first particle so that second particle is located on first particle；

The each trolley being already filled in multiple trolleys of first particle and second particle is set to be moved towards ignition furnace Flame is lighted on the superficial layer of second particle dynamic and in each trolley in being filled into the multiple trolley；

Make wherein to light each trolley in the multiple trolley of flame to move successively, to be arranged in Raw material processing part In multiple bellows above pass through, the Raw material processing part include sintering part and reduction part, in the sintering part, Second particle is sintered, and the reduction part is to restore after sintering part and wherein first particle Part, and

The reduction for executing the sintering reaction of second particle positioned at upside and first particle positioned at downside successively is anti- It answers, wherein the reduction of first particle includes：It is anti-from the reduction for carrying out first particle in the reduction part first The trolley answered is collected to be vented by the reduction that the reduction reaction generates；

And the reduction of collection is vented and is supplied in the trolley restored in part and to being located at the reduction The oxygen concentration in the trolley in part is adjusted, and thus generates reducing atmosphere in the trolley.

12. process for preparing raw material according to claim 11, wherein be supplied in by the reduction collected exhaust When the trolley in the reduction part, by the reduction exhaust be supplied in the Raw material processing part with the trolley The top layer of interior first particle has the trolley that the position of the temperature from 800 DEG C to 1000 DEG C corresponds to positioning.

13. process for preparing raw material according to claim 12, wherein the trolley movement along path on, when from When the part for the position that the reduction of the ignition furnace to first particle is completed is defined as entire Raw material processing part,

The reduction part of first particle is from pipeloop to the position that the supply reduction is vented to described first The part for the position that the reduction of particle is completed, and

14. process for preparing raw material according to claim 13, wherein to it is described reduction exhaust collection in, by with Multiple bellows collection that the reduction part in the Raw material processing part corresponds to positioning is anti-by the reduction of first particle The exhaust that should be generated.

15. process for preparing raw material according to claim 14, wherein include to the collection for restoring exhaust：

The reduction exhaust of collection is mixed with air；And

Before the exhaust collected from the multiple bellows is by the air blower in the collecting path of the reduction exhaust, The temperature of mixture is reduced to 500 DEG C or lower temperature.

16. process for preparing raw material according to claim 13, wherein in the sintering of second particle, described will go back The trolley of original exhaust supply positioning extremely corresponding with the sintering part, to provide heat source.

17. process for preparing raw material according to claim 16, wherein supplying the reduction exhaust to sintering part When, it will extraly be supplied to the trolley of positioning corresponding with the sintering part, thus by oxygen concentration tune from the air of outside sucking Section is 15% or more.

18. process for preparing raw material according to claim 11, wherein be filled into first particle in the trolley Piling height is 200mm to 400mm, including end value.

19. process for preparing raw material according to claim 18, wherein the piling height of second particle is by equation 1,2 It is determined with 3.

[equation 1]

[equation 2]

[equation 3]

20. process for preparing raw material according to claim 19, including：

It is discharged from first particle reduction completely and the fully sintered trolley of second particle by first particle The sinter for restoring the reduced iron generated and being generated by the sintering of second particle；And

The reduced iron of discharge and the sinter are detached.

21. process for preparing raw material according to claim 20, wherein in the reduzate and the sinter that will be discharged When separation,

It is detached according to the granularity or magnetism of first particle and second particle.

22. the steel that a kind of process for preparing raw material by described in any one of claim 11 to 21 produces.

23. the steel are used as blast furnace ironmaking processing material used.