CN106350667B - A kind of super thick bed of material sintering method using pre-sintering reducing small grain size content - Google Patents
A kind of super thick bed of material sintering method using pre-sintering reducing small grain size content Download PDFInfo
- Publication number
- CN106350667B CN106350667B CN201610815325.4A CN201610815325A CN106350667B CN 106350667 B CN106350667 B CN 106350667B CN 201610815325 A CN201610815325 A CN 201610815325A CN 106350667 B CN106350667 B CN 106350667B
- Authority
- CN
- China
- Prior art keywords
- cloth
- sintering
- time
- bed
- mine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention discloses a kind of super thick bed of material sintering method using pre-sintering for reducing small grain size content, in pre-sintering process, the iron ore concentrate that total iron charge weight percent is 60-80% will be accounted for, the Iron Ore Powder of 0-20%, 5-15% return mine and lime stone, after quick lime and coke powder carry out ingredient, after mixed once and secondary granulation, add returning mine for 5-12%, third time granulation is carried out again after being mixed well wetting, the wetting carries out atomization shape water spray wetting to returning mine, and the wet weight percentage returned mine after wetting is 7.5-8.0%；Sinter mixture is through tripper sub-material after third time is pelletized, respectively enter mixing distributing device for the first time and second of mixing distributing device, when first time cloth, material-loosing apparatus is set, cloth form is intermediate low, both sides are high, when second of cloth, it is also provided with material-loosing apparatus, charge level is smooth after cloth, sintered finished product sinter basicity is in 1.9-2.2, and ferrous content is in 7.0-9.0.
Description
Technical field
The present invention relates to the sintering production methods of iron ore, and sinter small grain size rank can be reduced by especially relating to one kind
The super thick bed of material sintering method using pre-sintering of content.
Background technique
In ironmaking production, the reasonable granularity composition of finished product sinter directly influences the stable smooth operation of blast furnace, is evaluation
The important technology index of sinter quality.Show that sinter rate containing powder increases 10% in previous production practices, furnace processor drop
Low 6%-8%, coke ratio increases 0.5%, therefore intensified-sintered mine screen divides whole grain, reduces the small grain size rank of 5-10mm in sinter
Content, maximum reduction < 5mm powder enter furnace content, are to guarantee blast furnace process, stable smooth operation, high yield low burn consumption
Important guarantee.
At home and abroad in relation to being sintered in the research and practice of small grain size content, the usual means for reducing small grain size content have:
1, Optimization Ore Matching；2, sintering air leak rate of air curtain is reduced；3, reinforce whole grain；4, process for stabilizing parameter；5, thickness of feed layer is improved.
Wherein improving thickness of feed layer is the effective ways for reducing small granularity level in finished product mine, but constant in sintering area
Under conditions of, the thickness of feed layer of sintering machine is also not can be without limitation raising, by equipment scale, exhaust fan ability, raw strip
Part, many factors such as sinter quality restrict.Once some researches show that only by the bed of material of simple raising sinter mixture both at home and abroad
Thickness, without taking corresponding technological measure, after thickness of feed layer reaches a certain level, the production capacity and quality of sintering machine all can be anxious
Play decline, loses more than gain.So current sintering material layer thickness generally also only exists in the case where taking various technical measures both at home and abroad
800mm or so, and it is sintered into global metallurgical problem more than the 900mm super thick bed of material, if the concentrate in raw materials for sintering is matched
Relatively high, the thickness of sinter bed even is difficult to reach 750mm or more.
So sintering process that must be innovative could thoroughly solve the problems, such as this, the yield of sinter could be effectively improved
And quality.
Summary of the invention
The technical problem to be solved by the present invention is to reduce the content of 5-10mm small grain size rank in finished product sinter, improve
The production stability of blast furnace, the present invention are separated by the way that the normal part for returning to sintered material is returned mine, using big flow,
After the water spray measure of atomization shape sufficiently soaks, pelletizes into mixing machine, can effectively improve the gas permeability of the bed of material, no
The only available significant decrease of small grain size content of sinter, further increases the yield of pre-sintering process.
Object of the present invention is to what is realized by following technical solution:
A kind of super thick bed of material sintering method using pre-sintering reducing small grain size content, it is characterised in that: be pre-sintered
In technique, will account for total iron charge weight percent be 60-80% iron ore concentrate, the Iron Ore Powder of 0-20%, 5-15% return mine and stone
After lime stone, quick lime and coke powder carry out ingredient, after mixed once and secondary granulation, returning mine for 5-12% is added, through filling
Third time granulation is carried out again after point mixing wetting, and the wetting carries out atomization shape water spray wetting to returning mine, and returns mine after wetting
Wet weight percentage be 7.5-8.0%；Sinter mixture respectively enters for the first time through tripper sub-material after third time is pelletized
Mix distributing device and second mixing distributing device, when first time cloth, material-loosing apparatus be set, cloth form be it is intermediate low, both sides are high,
When second of cloth, it is also provided with material-loosing apparatus, charge level is smooth after cloth, and sintered finished product sinter basicity is in 1.9-2.2, ferrous iron
Content is in 7.0-9.0.
The pre-sintering process are as follows: sintering belt type roasting machine on configured with first and second mixing distributing device and first,
Post-ignition hood；When first time is through mixing distributing device cloth sinter mixture, bed of cloth thickness is in 500mm-900mm, point for the first time
Knot is burnt, after sintering 8-40min in advance, carries out second of cloth sinter mixture in cloth layer surface for the first time, fabric thickness exists
100mm-650mm, sintering suction pressure remain unchanged, and carry out ignition sintering to second of bed of cloth, second of bed of cloth is completed
When igniting, the mixture of bed of cloth is being sintered for the first time, for the first time the sum of bed of cloth thickness and second of bed of cloth thickness >=
1000mm, at rear of sintering machine, bed of cloth and second of bed of cloth are complete sintering for the first time.
It is proved by commerical test, by the reasonable distribution of sinter return fine, then will partially return mine and sufficiently soak and make three times
After grain, returning mine as good balling-up core after wetting, the amount of powder that balling-up is difficult in script mixture, which is wrapped in, returns mine
Periphery forms new fine grained bead, greatly increases the balling ratio of mixture, powder is remarkably decreased.Again by configuring loose metal
Device, when carrying out pre-sintering process production, the cold conditions of the bed of material and hot gas permeability have all obtained significant raising.Produce result
Show that not only the small grain size content of sinter is decreased obviously with the method, yield has obtained further raising, makes pre-
Sintering process is improved perfect.
Figure of description
Fig. 1 is the present invention using the super thick bed of material sintering method process flow chart being pre-sintered；
Wherein 1 mixture distributor device a, 2 be igniter a, and 3 be bed of cloth for the first time, and 4 be mixture distributor device b, and 5 be igniting
Device b, 6 be second of bed of cloth, and 7 be material-loosing apparatus a, and 8 be material-loosing apparatus b.
Specific embodiment
It is illustrated combined with specific embodiments below:
Concrete technology flow process of the invention such as Fig. 1, when being sintered production with belt type roasting machine, belt type roasting machine only has
A set of exhausting system carries out loose metal to mixture with feed appliance 7, then passes through igniting by 1 cloth mixture of mixture distributor device
Device 2 is lighted a fire, and is carried out cloth after the mixture of bed of cloth 3 for the first time is sintered 8-40min, then through mixture distributor device 4, is used
Material-loosing apparatus 8 carries out loose metal to mixture, is then lighted a fire by igniter 5, continues to be sintered after igniting, at tail,
Bed of cloth 3 and second of bed of cloth 6 all complete sintering for the first time.Specific embodiment is as follows:
Embodiment 1:
1, when 360 square meter sintering machines are sintered production using pre-sintering process, will account for total iron charge weight percent is
60% iron ore concentrate, 20% fine ore, 15% return mine and lime stone, after quick lime and coke powder carry out ingredient, by once mixing
Close and secondary granulation after, then with addition of weight percent be 5% to return mine, this returns mine and soaks in advance by atomized water, wet weight
Percentage is 7.5%, finally carries out third time granulation.After pelletizing three times, when first time cloth, through material-loosing apparatus a to mixing
Material carries out loose metal, and the form of charge level is intermediate low after cloth, and both sides are high, bed depth 600mm.When carrying out second of cloth,
Material-loosing apparatus b is set, and charge level is smooth after cloth, and when second of cloth, the height of upper layer charge level is 400mm.Sintered finished product is burnt
Mine is tied, basicity is 2.0, and ferrous content is 8.2.
It is main to produce result such as table 1 under this technique, scheme in table 1 before taking measures with use the solution of the present invention
For same material condition, but second it is outer match return mine and be just added in mixture in ingredient.
Table 1 produces Comparative result
Known by creation data in table 1, after using the present invention, the size grade ratio of finished product sinter obviously rises,
Content of the small grade in finished product mine is remarkably decreased, while unit-hour output has been increased to 545t/h from 530t/h, yield obtain into
The raising of one step.
Embodiment 2:
1, when 360 square meter sintering machines are sintered production using pre-sintering process, by the iron essence of weight percent 70%
Mine, 10% fine ore, after 10% return mine carries out ingredient, after mixed once and secondary granulation, then with addition of weight percent
It returns mine for 10%, this returns mine and soaks in advance by atomized water, and wet weight percentage is 7.8%, finally carries out third time system
Grain.After pelletizing three times, when first time cloth, loose metal is carried out to mixture through material-loosing apparatus a, during the form of charge level is after cloth
Between it is low, both sides are high, bed depth 700mm.When carrying out second of cloth, material-loosing apparatus b is set, charge level is smooth after cloth, and second
When secondary cloth, the height of upper layer charge level is 300mm.Sintered finished product sinter, basicity is 2.05, and ferrous content is 8.5.
It is main to produce result such as table 2 under this technique, scheme in table 2 before taking measures with use the solution of the present invention
For same material condition, but second it is outer match return mine and be just added in mixture in ingredient.
Table 2 produces Comparative result
Known by creation data in table 2, after using the present invention, the size grade ratio of finished product sinter obviously rises,
Content of the small grade in finished product mine is reduced to 32.41% from 38.09%, while unit-hour output is increased to from 525t/h
540t/h, yield are further improved.
Embodiment 3:
1, when 360 square meter sintering machines are sintered production using pre-sintering process, by the iron essence of weight percent 80%
Mine is 12% to return mine after mixed once and secondary granulation, then with addition of weight percent after 8% return mine carries out ingredient,
This returns mine and soaks in advance by atomized water, and wet weight percentage is 8.0%, finally carries out third time granulation.By making three times
After grain, when first time cloth, loose metal is carried out to mixture through material-loosing apparatus a, the form of charge level is intermediate low after cloth, and both sides are high,
Bed depth is 600mm.When carrying out second of cloth, material-loosing apparatus b is set, charge level is smooth after cloth, when second of cloth, upper layer
The height of charge level is 500mm.Sintered finished product sinter, basicity is 2.1, and ferrous content is 8.7.
It is main to produce result such as table 3 under this technique, scheme in table 3 before taking measures with use the solution of the present invention
For same material condition, but second it is outer match return mine and be just added in mixture in ingredient.
Table 3 produces Comparative result
Known by creation data in table 3, after using the present invention, the size grade ratio of finished product sinter obviously rises,
Content of the small grade in finished product mine drops to 31.48% from 37.50, while unit-hour output has been increased to 540t/ from 520t/h
H, yield are further improved.
Claims (1)
1. a kind of super thick bed of material sintering method using pre-sintering for reducing small grain size content, it is characterised in that: be pre-sintered work
In skill, will account for total iron charge weight percent be 60-80% iron ore concentrate, the Iron Ore Powder of 0-20%, 5-15% return mine and lime
After stone, quick lime and coke powder carry out ingredient, after mixed once and secondary granulation, total iron charge weight percent 5- is added
12% return mine, carries out third time granulation again after being mixed well wetting, the wetting carries out atomization shape water spray to returning mine
Wetting, the wet weight percentage returned mine after wetting are 7.5-8.0%；Sinter mixture is through tripper point after third time is pelletized
Material, respectively enters mixing distributing device for the first time and second mixing distributing device, and when first time cloth, material-loosing apparatus, cloth shape is arranged
Formula be it is intermediate low, both sides are high, when second of cloth, are also provided with material-loosing apparatus, charge level is smooth after cloth, sintered finished product sinter
Basicity is in 1.9-2.2, and ferrous content is in 7.0-9.0；The pre-sintering process are as follows: configured with the on sintering belt type roasting machine
First and second mixing distributing device and No. first and second igniter；When first time is through mixing distributing device cloth sinter mixture, cloth for the first time
Thickness of feed layer carries out second after sintering 8-40min in advance in cloth layer surface for the first time in 500mm-900mm, ignition sintering
Cloth sinter mixture, fabric thickness are sintered suction pressure and remain unchanged, carry out a little to second of bed of cloth in 100mm-650mm
Burn knot, when second bed of cloth completes igniting, the mixture of bed of cloth is being sintered for the first time, for the first time bed of cloth thickness and
The sum of second of bed of cloth thickness >=1000mm, at rear of sintering machine, bed of cloth and second of bed of cloth are complete for the first time
Sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815325.4A CN106350667B (en) | 2016-09-12 | 2016-09-12 | A kind of super thick bed of material sintering method using pre-sintering reducing small grain size content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815325.4A CN106350667B (en) | 2016-09-12 | 2016-09-12 | A kind of super thick bed of material sintering method using pre-sintering reducing small grain size content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106350667A CN106350667A (en) | 2017-01-25 |
| CN106350667B true CN106350667B (en) | 2018-12-04 |
Family
ID=57858330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610815325.4A Active CN106350667B (en) | 2016-09-12 | 2016-09-12 | A kind of super thick bed of material sintering method using pre-sintering reducing small grain size content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106350667B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507354B (en) * | 2018-04-13 | 2019-06-25 | 湖南理工学院 | Realize the controllable sintering system of granularity and distribution device of mixture and coke powder segmentation |
| CN112414139B (en) * | 2019-09-03 | 2022-04-12 | 中冶长天国际工程有限责任公司 | Layered segregation distributing device and distributing method for composite sintering mixture |
| CN111041195B (en) * | 2020-01-03 | 2021-01-29 | 中南大学 | Strong mixing-granulating method for strengthening sintering of high-proportion micro-fine particle raw materials |
| CN115505728B (en) * | 2022-09-26 | 2023-10-20 | 鞍钢股份有限公司 | Sintering method using coking dust as main fuel for sintering super-thick material layer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09209050A (en) * | 1996-02-05 | 1997-08-12 | Nippon Steel Corp | Manufacture of sintered ore by high layer thickness |
| CN1055318C (en) * | 1998-05-29 | 2000-08-09 | 冶金工业部钢铁研究总院 | Production of sintered pelletized minerals |
| CN101037720A (en) * | 2007-04-28 | 2007-09-19 | 中南大学 | Method for sintering iron ore powder with super high material layer |
| CN101294243B (en) * | 2008-07-01 | 2011-02-09 | 攀钢集团研究院有限公司 | Pelletisation process for iron ore concentrate sintered mix |
| CN105316478B (en) * | 2014-06-11 | 2017-10-27 | 鞍钢股份有限公司 | A kind of sintering production method for improving limonite proportioning |
| CN105714103A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Method for producing sintering ore with iron ore concentrate as main iron materials |
-
2016
- 2016-09-12 CN CN201610815325.4A patent/CN106350667B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106350667A (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106350667B (en) | A kind of super thick bed of material sintering method using pre-sintering reducing small grain size content | |
| CN104651602B (en) | Method for preparing sinter ore by using high-silicon fine ore | |
| CN103512351B (en) | A kind of sintering equipment of metallized sinter and production method thereof | |
| CN106350665B (en) | A kind of super thick bed of material sintering method using pre-sintering reducing sinter return fine rate | |
| CN108642272A (en) | A kind of brown ocher high mixture ratio sintering method | |
| CN105132673B (en) | A kind of method for reducing carbon containing dust pellet material composite agglomeration solid fuel consumption | |
| CN108754131A (en) | A kind of sintering production method of optimization fuel collocation | |
| CN101928823A (en) | Sintering method of iron ore powder with high content of crystal water | |
| JP7381876B2 (en) | Sintered ore manufacturing method and sintering machine | |
| CN109576488A (en) | A method of sinter is produced using high proportion Bayan Obo iron ore concentrate | |
| CN105219953B (en) | A kind of ferric manganese ore powder sintering matches somebody with somebody the method for ore deposit | |
| CN108774683B (en) | A kind of high magnesium composite sinter and its production method | |
| CN105316478B (en) | A kind of sintering production method for improving limonite proportioning | |
| CN103572043B (en) | The production method of low basicity sinter | |
| CN107419045A (en) | The recovery method and blast furnace dedusting ash agglomerated material of blast furnace dedusting ash | |
| JP2015193930A (en) | Method for producing sintered ore | |
| CN105331808B (en) | A kind of method of iron mineral powder agglomeration | |
| CN106337113B (en) | A kind of super thick bed of material sintering method using pre-sintering | |
| JP4887730B2 (en) | Binder for granulation of sintering raw material and granulation method | |
| CN106467934B (en) | A method of improving pre-sintering process thermal uniformity | |
| CN107164631B (en) | A kind of method and system improving iron ore sintering mixture ventilation | |
| CN107012317A (en) | A kind of vast scale uses the sintering operation method of limonite | |
| CN106498152B (en) | A kind of limonite super thick bed of material sintering method using pre-sintering | |
| CN110257626A (en) | The method of sinter and the sinter of preparation are prepared using steel rolling iron scale | |
| CN109402382A (en) | It is sintered the sintering feed and sinter of preparation method for material and its preparation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |