CN107164631A - A kind of method and system for improving iron ore sintering mixture ventilation - Google Patents
A kind of method and system for improving iron ore sintering mixture ventilation Download PDFInfo
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- CN107164631A CN107164631A CN201710524226.5A CN201710524226A CN107164631A CN 107164631 A CN107164631 A CN 107164631A CN 201710524226 A CN201710524226 A CN 201710524226A CN 107164631 A CN107164631 A CN 107164631A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- Life Sciences & Earth Sciences (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of method and system for improving iron ore sintering mixture ventilation.This method includes：Prepare iron ore sintering raw material and carry out mixed processing, the material for therefrom separating 10 50wt% carries out briquetting, and rest materials are pelletized；Material after briquetting and the material after granulation are together sintered.The system includes dosing, mixed cell, pelletization unit, briquetting unit and sintering unit；The entrance of mixed cell is connected with the outlet of dosing, and the outlet of mixed cell is connected with the entrance of pelletization unit and the entrance of briquetting unit respectively；The outlet of pelletization unit and the outlet of the briquetting unit are connected with sintering the entrance of unit respectively.The technical scheme that the present invention is provided can effectively improve sinter mixture average grain diameter, improve mixture ventilation index, sinter bed can be made to improve to 800 1000mm, the production efficiency of sintering is effectively increased.
Description
Technical field
The present invention relates to a kind of method and system for improving iron ore sintering mixture ventilation, belong to iron ore sintering skill
Art field.
Background technology
Deep bed sintering low-temperature sintering technology is the advanced sintering technology being generally used in recent years.Based on calcium ferrite consolidation theory
And the auto accumulation heat of sintering process is acted on, deep-bed sintering can reach reduction solid fuel consumption, reduce oxycarbide discharge,
Reduction burning tape thickness, reduces sintering deposit ferrous content, promotes the generation of calcium ferrite, improve sintering deposit mineral structure, improve and burn
Ore deposit intensity is tied, the advantages of improving sintering deposit yield rate.But after sinter bed reaches certain thickness, bed permeability will be brought
It is deteriorated, sintering velocity reduction, lower floor's sintering deposit superfusion causes the problems such as physicochemical property is deteriorated.Therefore, how further to carry
High bed depth, can improve Sintering Operation Index index again, significant to sintering development.And bed permeability improvement is then
The key that can bed depth further improve,
So-called permeability of sintering material bed, refers to the size for the resistance that the sintered compound bed of material passes through to gas, is sintering process
In important technological parameter.Mass transfer, the heat transfer of flow condition and changing rule influence sintering process of the gas in sinter bed
And physical-chemical reaction, directly determine vertical sintering speed.Permeability of sintering material bed is good, is passed through the air capacity in sinter bed
Fully, it is beneficial to the progress of each physical-chemical reaction of sinter bed.
Therefore, bed permeability how is improved as this area technical problem urgently to be resolved hurrily.
The content of the invention
In order to solve the above technical problems, improving iron ore sintering mixture ventilation it is an object of the invention to provide one kind
Method and system.The technical scheme that the present invention is provided can substantially change granularmetric composition and the average grain diameter of compound, improve
Its porosity, so as to improve the gas permeability of sinter mixture.
To reach above-mentioned purpose, the invention provides a kind of method for improving iron ore sintering mixture ventilation, the party
Method comprises the following steps：
Iron ore sintering raw material is prepared, the iron ore sintering raw material includes Iron Ore Powder, flux, fuel and cold returned mine；
Iron ore sintering raw material is carried out after mixed processing, the material for therefrom separating 10-50wt% carries out briquetting processing, with
Agglomerate is compressed into, rest materials carry out pelletization treatment；
The material after material and pelletization treatment after briquetting is handled together is sintered, until sintering process terminates.
The gas permeability of sinter bed is influenceed by bed structure to a certain extent, and its improvement is to reduction bed of material gas resistance
Power, improving bed permeability has very big effect, and present invention research is found：Determine that the major parameter of bed structure is mixed for granulation
The granularmetric composition of material and the average grain diameter of compound are closed, its average grain diameter is bigger, and the scope of size distribution is narrower, then between particle
Space it is more (porosity high), air-flow is easily by the gas permeability of the bed of material is better.Using the technical scheme that provides of the present invention from
The material that 10-50wt% is separated in iron ore sintering raw material carries out briquetting processing, is pressed into agglomerate, and rest materials are carried out at granulation
Reason, the average grain diameter of material can be effectively improved by being then together sintered, and reduce the scope of size distribution.
In the above-mentioned methods, it is preferable that iron ore sintering raw material is carried out after mixed processing, 20-30wt% is therefrom separated
Material carry out briquetting processing, to be compressed into agglomerate.
In the above-mentioned methods, it is preferable that the granularity of the agglomerate is 6-12mm, compression strength is 5-10N/, is fallen strong
Degree>3 times/；It is highly preferred that being shaped as the agglomerate is spherical or cube shaped, but not limited to this.
In the above-mentioned methods, it is preferable that when carrying out briquetting processing, this method also includes the step that auxiliary agent is added into material
Suddenly；It is highly preferred that the auxiliary agent includes binding agent and/or flux, but not limited to this.
In the above-mentioned methods, in the iron ore sintering raw material, Iron Ore Powder, flux, fuel and the cold proportioning returned mine do not have
It is particularly limited to；Preferably, in terms of butt, in the iron ore sintering raw material, the mass percentage content of the Iron Ore Powder is
68%, the mass percentage content of the flux is 11.5%, and the quality of fuel degree is 3.8%, described cold
The mass percentage content returned mine is 16.7%.
In the above-mentioned methods, it is preferable that when iron ore sintering raw material is carried out into mixed processing, this method is also included to material
In the step of add water.
In the above-mentioned methods, it is preferable that when rest materials are carried out into pelletization treatment, this method also includes injecting into material
The step of steam.
In the technical scheme that the present invention is provided, the material after material and pelletization treatment after briquetting is handled together is carried out
During sintering, the compound of the material after briquetting processing and the mixtures of materials material after pelletization treatment together into sintering machine head end is buffered
Storehouse, and after through cloth, igniting, complete sintering production.
Present invention also offers a kind of system for improving iron ore sintering mixture ventilation, the system includes charger sheet
Member, mixed cell, pelletization unit, briquetting unit and sintering unit；Wherein, the entrance of the mixed cell and the dosing
Outlet be connected, the outlet entrance and the entrance phase of the briquetting unit respectively with the pelletization unit of the mixed cell
Even；The entrance of the outlet of the pelletization unit and the outlet of the briquetting unit respectively with the sintering unit is connected.
In said system, it is preferred that the sintering unit includes igniter and gas injection apparatus；The igniting dress
Put and be connected with the gas injection apparatus.
In said system, it is preferred that the sintering unit also includes distribution device, and the distribution device can be used for paving
Glove material.
In said system, it is preferred that the sintering unit also includes surge bunker.Material to be sintered is introduced into surge bunker,
And after through cloth, igniting, complete sintering process.
In said system, it is preferred that the system also includes steam injection unit, the outlet point of the steam injection unit
It is not connected with the pelletization unit and the sintering unit.In a detailed embodiment, the steam injection unit goes out
Entrance of the mouth respectively with surge bunker in the entrance and the sintering unit of the pelletization unit is connected.
In said system, it is preferred that the system also includes water injection unit, one end of the water injection unit is mixed with described
The entrance for closing unit is connected, and the other end is connected with the outlet of the pelletization unit.When needing water filling, the water injection unit can be with
The water filling into the mixed cell and the pelletization unit.
In said system, it is preferred that the exit of the mixed cell is provided with feeding-distribution device；The feeding-distribution device includes
Style three-way distributor, distribution box or belt plow.
In said system, it is preferred that the dosing be provided with meausring apparatus, the meausring apparatus include belt conveyer scale or
Spiral claims.
In said system, it is preferred that the system also include auxiliary agent adding device, the auxiliary agent adding device with institute
Briquetting unit is stated to be connected.
In said system, it is preferred that the mixed cell includes trommel mixer or vertical mixer；The granulation is single
Member includes drum pelletizer or disc balling machine；The briquetting unit includes high pressure cuber or hydraulic pressure cuber.
Beneficial effects of the present invention：
The technical scheme that the present invention is provided uses briquetting PROCESS FOR TREATMENT sinter mixture, effectively changes sinter mixture
Granularmetric composition and average grain diameter, improve the porosity of sinter mixture, so as to improve the gas permeability of sinter mixture；Finally
The thickness of sinter bed is improved, sintering production efficiency is improved.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the system for raising iron ore sintering mixture ventilation that embodiment 1 is provided；
Fig. 2 is a kind of structural representation of the system for raising iron ore sintering mixture ventilation that embodiment 2 is provided；
Fig. 3 is the process chart that embodiment 3 provides the method for improving iron ore sintering mixture ventilation；
Main Reference label declaration：
1：Dosing；2：Mixed cell；3：Pelletization unit；4：Briquetting unit；5：Sinter unit；6：Air injection dress
Put；7：Coal gas injection device；8：Igniter；9：Steam injection unit；10：Water injection unit；11：Auxiliary agent adding device.
Embodiment
In order to which technical characteristic, purpose and beneficial effect to the present invention are more clearly understood from, now to the skill of the present invention
Art scheme carry out it is described further below, but it is not intended that to the present invention can practical range restriction.
Embodiment 1
Embodiment provides a kind of system (as shown in Figure 1) for improving iron ore sintering mixture ventilation.
The system includes dosing 1, mixed cell 2, pelletization unit 3, briquetting unit 4 and sintering unit 5；Wherein, mix
The entrance for closing unit 2 is connected with the outlet of dosing 1, the entrance and briquetting that export respectively with pelletization unit 3 of mixed cell 2
The entrance of unit 4 is connected；Pelletization unit 3 is exported and the outlet of briquetting unit 4 is connected with sintering the entrance of unit 5 respectively；
The exit that mixed cell 2 is connected with pelletization unit 3 and briquetting unit 4 respectively is provided with feeding-distribution device；Sub-material is filled
Putting can be style three-way distributor, distribution box or belt plow.
Dosing 1 claims provided with belt conveyer scale or spiral, for weighing iron ore sintering raw material；
Mixed cell 2 can be trommel mixer or vertical mixer；
Pelletization unit 3 can be drum pelletizer or disc balling machine；
Briquetting unit 4 can be high pressure cuber or hydraulic pressure cuber；
The entrance and exit for the system each unit that the present embodiment is provided can be connected by ribbon conveyer, constitute sintering life
Producing line.
Embodiment 2
Embodiment provides a kind of system (as shown in Figure 2) for improving iron ore sintering mixture ventilation, and the system is
Further improve what is obtained on the basis of the system that embodiment 1 is provided.
On the basis of the system that embodiment 1 is provided, the system can also include water injection unit 10, and water injection unit 10 is distinguished
It is connected with the entrance of mixed cell 2 and the entrance of pelletization unit 3；
The system can also include auxiliary agent adding device 11；The outlet of auxiliary agent adding device 11 and the entrance of briquetting unit 4
It is connected；
The system can also include steam injection unit 9, and the outlet of steam injection unit 9 is respectively with pelletization unit 3 and burning
Statement of account member 5 is connected；
Surge bunker, igniter 8, air injection device 6, coal gas injection device 7 and cloth dress can be included by sintering unit 5
Put；Wherein, the outlet of steam injection unit 9 is connected with the entrance of surge bunker, 7 points of air injection device 6 and coal gas injection device
It is not connected with igniter 8.
Embodiment 3
A kind of method (flow is as shown in Figure 3) for improving iron ore sintering mixture ventilation is present embodiments provided, should
The system that method employs the offer of embodiment 2, is mainly included the following steps that：
Weighed using dosing 1 and prepare iron ore sintering raw material, the iron ore sintering raw material includes Iron Ore Powder, melted
Agent, fuel and cold return mine；Then it is delivered to mixed cell 2 by sealing-tape machine to be mixed, water filling list can be passed through in mixed process
Member 10 adds water into material；
After mixing, the material for separating 50wt% by feeding-distribution device enters the group that 8cm diameters are pressed into briquetting unit 4
Block；Remaining material enters is pelletized in pelletization unit 3, can be added in pelletization by water injection unit 10 into material
Water；
The material after material and pelletization treatment after briquetting is handled together is delivered in sintering unit 5 and is sintered, and obtains
Finished product is obtained, during sintering, sintering negative pressure is 10kPa, and firing temperature is 1150 DEG C, and the thickness of sinter bed is 1000mm.
Sintering finished rate reaches 84.5%, and drum strength is 67.53%, and usage factor is 1.567t/ (m2H), vertically
Sintering velocity is 20.22mmmin-1。
Use traditional handicraft (conventional process flow for：Dispensing --- mixing --- granulation --- sintering) to identical iron ore
Stone raw materials for sintering is handled, finally sintering negative pressure be 10kPa, firing temperature be 1150 DEG C under conditions of tested, its
The thickness of sinter bed is only 700mm.Sintering finished rate only reaches 78.5%, and drum strength is 64.24%, and usage factor is
1.324t/(m2H), vertical sintering speed is 21.72mmmin-1。
From result, compared with traditional handicraft, the thickness of sinter bed improves 300mm in the present embodiment, utilizes system
Number improves about 18%.
Embodiment 4
A kind of method for improving iron ore sintering mixture ventilation is present embodiments provided, this method can be using implementation
The system that example 1 or 2 is provided, is mainly included the following steps that：
Weighed using dosing 1 and prepare iron ore sintering raw material, the iron ore sintering raw material includes Iron Ore Powder, melted
Agent, fuel and cold return mine；Then it is delivered to mixed cell 2 by sealing-tape machine to be mixed, water filling list can be passed through in mixed process
Member 10 adds water into material；
After mixing, the material for separating 30wt% by feeding-distribution device enters the group that 8cm diameters are pressed into briquetting unit 4
Block；Remaining material enters is pelletized in pelletization unit 3, can be added in pelletization by water injection unit 10 into material
Water；
The material after material and pelletization treatment after briquetting is handled together is delivered in sintering unit 5 and is sintered, and obtains
Finished product is obtained, during sintering, system sintering negative pressure is 10kPa, and firing temperature is 1150 DEG C, and the thickness of sinter bed is 800mm.
Sintering finished rate reaches 80.78%, and drum strength is 66.77%, and usage factor is 1.448t/ (m2H), vertically
Sintering velocity is 21.66mmmin-1。
Identical iron ore sintering raw material is handled using traditional handicraft, is finally 10kPa, igniting in sintering negative pressure
Temperature is is tested under conditions of 1150 DEG C, the thickness of its sinter bed is only 700mm.Sintering finished rate is only reached
78.5%, drum strength is 64.24%, and usage factor is 1.324t/ (m2H), vertical sintering speed is 21.72mmmin-1。
From result, compared with traditional handicraft, the thickness of sinter bed improves 100mm in the present embodiment, utilizes system
Number improves about 9%.
Claims (10)
1. a kind of method for improving iron ore sintering mixture ventilation, this method comprises the following steps：
Iron ore sintering raw material is prepared, the iron ore sintering raw material includes Iron Ore Powder, flux, fuel and cold returned mine；
Iron ore sintering raw material is carried out after mixed processing, the material for therefrom separating 10-50wt% carries out briquetting processing, by it
Agglomerate is pressed into, rest materials carry out pelletization treatment；
The material after material and pelletization treatment after briquetting is handled together is sintered, until sintering process terminates.
2. according to the method described in claim 1, wherein, the granularity of the agglomerate is 6-12mm, and compression strength is 5-10N/,
Drop strength>3 times/；
Preferably, the agglomerate be shaped as it is spherical or cube shaped.
3. method according to claim 1 or 2, wherein, when carrying out briquetting processing, this method also includes adding into material
The step of entering auxiliary agent；
Preferably, the auxiliary agent includes binding agent and/or flux.
4. according to the method described in claim 1, wherein, in terms of butt, in the iron ore sintering raw material, the Iron Ore Powder
Mass percentage content be 68%, the mass percentage content of the flux is 11.5%, the quality of fuel percentage
Content is 3.8%, and the cold mass percentage content returned mine is 16.7%.
5. according to the method described in claim 1, wherein, by iron ore sintering raw material carry out mixed processing when, this method is also wrapped
Include the step of being added water into material；
Preferably, when rest materials being carried out into pelletization treatment, the step of this method also includes injecting steam into material.
6. it is a kind of improve iron ore sintering mixture ventilation system, it include dosing, mixed cell, pelletization unit,
Briquetting unit and sintering unit；Wherein, the entrance of the mixed cell is connected with the outlet of the dosing, and the mixing is single
The outlet of member is connected with the entrance of the pelletization unit and the entrance of the briquetting unit respectively；The outlet of the pelletization unit and
Entrance of the outlet of the briquetting unit respectively with the sintering unit is connected.
7. system according to claim 6, wherein, the sintering unit includes igniter and gas injection apparatus；Institute
Igniter is stated with the gas injection apparatus to be connected.
8. system according to claim 6, wherein, the system also includes water injection unit, one end of the water injection unit
It is connected with the mixed cell entrance, the other end is connected with the entrance of the pelletization unit.
9. system according to claim 6, wherein, the system also includes steam injection unit, the steam injection unit
Outlet be connected respectively with the pelletization unit and the sintering unit.
10. system according to claim 6, wherein, the exit of the mixed cell is provided with feeding-distribution device；The sub-material
Device includes style three-way distributor, distribution box or belt plow；
It is preferred that, the dosing is provided with meausring apparatus, and the meausring apparatus includes belt conveyer scale or spiral claims；
It is furthermore preferred that the mixed cell includes trommel mixer or vertical mixer；The pelletization unit includes drum polletizing
Machine or disc balling machine；The briquetting unit includes high pressure cuber or hydraulic pressure cuber.
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| CN201710524226.5A CN107164631B (en) | 2017-06-30 | 2017-06-30 | A kind of method and system improving iron ore sintering mixture ventilation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108754130A (en) * | 2018-06-15 | 2018-11-06 | 浙江大学 | A kind of method and system improving iron ore sintering bed gas permeability |
| CN110484717A (en) * | 2019-09-18 | 2019-11-22 | 四川省达州钢铁集团有限责任公司 | A kind of sintering method and sintering equipment |
| WO2023039652A1 (en) * | 2021-09-20 | 2023-03-23 | Tecnored Desenvolvimento Tecnologico S.A. | Cold-pressed solid agglomerate and method for producing same |
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| CN103114201A (en) * | 2013-02-06 | 2013-05-22 | 中南大学 | Agglomeration method for iron containing dust slime of iron and steel plants |
| CN103305690A (en) * | 2013-06-25 | 2013-09-18 | 中南大学 | Pre-pressing forming and intensified sintering method of fine iron ore concentrate |
| WO2015152112A1 (en) * | 2014-04-01 | 2015-10-08 | Ｊｆｅスチール株式会社 | Device for manufacturing pelletized sinter feed |
| CN206902200U (en) * | 2017-06-30 | 2018-01-19 | 中冶京诚工程技术有限公司 | A kind of system for improving iron ore sintering mixture ventilation |
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| CN103114201A (en) * | 2013-02-06 | 2013-05-22 | 中南大学 | Agglomeration method for iron containing dust slime of iron and steel plants |
| CN103305690A (en) * | 2013-06-25 | 2013-09-18 | 中南大学 | Pre-pressing forming and intensified sintering method of fine iron ore concentrate |
| WO2015152112A1 (en) * | 2014-04-01 | 2015-10-08 | Ｊｆｅスチール株式会社 | Device for manufacturing pelletized sinter feed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108754130A (en) * | 2018-06-15 | 2018-11-06 | 浙江大学 | A kind of method and system improving iron ore sintering bed gas permeability |
| CN110484717A (en) * | 2019-09-18 | 2019-11-22 | 四川省达州钢铁集团有限责任公司 | A kind of sintering method and sintering equipment |
| WO2023039652A1 (en) * | 2021-09-20 | 2023-03-23 | Tecnored Desenvolvimento Tecnologico S.A. | Cold-pressed solid agglomerate and method for producing same |
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| CN107164631B (en) | 2019-11-12 |
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