CN105886681A - Method for removing accumulation of center of blast furnace hearth - Google Patents
Method for removing accumulation of center of blast furnace hearth Download PDFInfo
- Publication number
- CN105886681A CN105886681A CN201610341160.1A CN201610341160A CN105886681A CN 105886681 A CN105886681 A CN 105886681A CN 201610341160 A CN201610341160 A CN 201610341160A CN 105886681 A CN105886681 A CN 105886681A
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- China
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- center
- cupola well
- fluorite
- blast furnace
- slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a method for removing accumulation of the center of a blast furnace hearth. According to the method, material containing CaF2 or MnO is fed to the center part of the furnace hearth in the form of lump ores, so as to increase the content of CaF2 or MnO in slag at the center part of the blast furnace hearth, reduce the melting temperature and the viscosity number of the slag accumulated at the center part of the furnace hearth, improve the mobility, and remove accumulation of the center of the furnace hearth. According to the invention, by reasonably arranging the quantity of fluorite or manganese ore fed to the center, and combining with other technical means, the problem of accumulation of the center of the furnace hearth can be perfectly solved.
Description
Technical field
The present invention relates to a kind of method that blast furnace crucibe is produced in ironmaking processes the technical finesse that center is piled up, be specifically related to one
Plant and eliminate the method that blast furnace crucibe center is piled up, belong to technical field of blast furnace ironmaking.
Background technology
Liquid slag iron and coke it is mainly in blast furnace crucibe.Cross coke stock column drippage from the liquid slag Tie Tong of upper blast furnace fusing to enter
Cupola well between being filled in the hole of coke stock column.Due to coke quality or operating duty is unreasonable etc. that reason makes from being positioned at cupola well top
Air port blast the coal gas that the hot blast in blast furnace and coke fire coal produce and can not arrive cupola well centre or quantity reduces, thus
Make cupola well central area physical temperature reduce, be positioned at the slag iron temperature reduction of cupola well central area, viscosity rising, slag iron mobility
It is deteriorated and even loses flowability when serious accumulation, make cupola well central task not reach normal condition thus become in " dead band ", seriously
Affect blast fumance.On the other hand, if slag liquid slag viscosity or melting temperature are high, when cupola well central area temperature
During reduction, the most easily it is formed centrally within accumulation owing to slag fluidity is deteriorated.
Producing the basic reason piled up at cupola well center has be cupola well center physical temperature low and slag melting warm in nature degree high lance at two: one
Shield；Two is that slag viscosity is high, poor fluidity.When cupola well center is piled up and produced, common processing method includes reducing tuyere line
Air port long-pending, stifled, the charging system of employing centre of development, so that the heat in cupola well generation can arrive cupola well center, so that
Cupola well central temperature is low, the slag iron mixture of poor fluidity can flow freely, and discharges blast furnace；Or use containing CaF2Or MnO
Raw material, make the melting temperature of slag reduce, viscosity reduce, mobility improve.
Containing CaF2Or the raw material of MnO is as the prepurging raw material of blast furnace, it is common that former with iron content by the form of sintering deposit or rawore
In the material stove of mixing addition simultaneously, the finally CaF in the slag of cupola well zones of different2Or MnO content is more or less the same.Therefore, exist
While elimination cupola well center is piled up, owing to viscosity reduction, mobility improve the increase bricking formation punching also to cupola well neighboring area
Brush, reduces bricking service life.This purpose is piled up, as long as the slag of cupola well central area can be made from eliminating cupola well center
Melting temperature and viscosity reduce, then coordinate the operating duty improving cupola well central temperature, as increase air quantity, improve wind-warm syndrome,
Increase air port length, the measure of central coke charcoal, it becomes possible to play and eliminate the effect that cupola well center is piled up.
Summary of the invention
It is an object of the invention to provide a kind of method that can effectively eliminate the accumulation of cupola well center.
In order to reach above-mentioned technique effect, the present invention takes techniques below scheme:
A kind of method eliminating the accumulation of cupola well center, mainly will be containing CaF2Or the raw material of MnO adds in stove with the form of lump ore,
With reach improve blast furnace crucibe centre slag in CaF2Or the content of MnO, reduce the slag of cupola well centre accumulation
Melting temperature and viscosity number, improve mobility, thus reach to eliminate the purpose that cupola well center is piled up.
Further scheme is: described containing CaF2Raw material be fluorite, the raw material containing MnO is manganese ore.
One core of the present invention is to join fluorite or manganese ore the distributing mode of blast furnace, owing to it is an object of the invention to solve
The problem that certainly blast furnace crucibe center is piled up, then, fluorite or manganese ore also must be added to blast furnace crucibe centre.
For different situations, different cloth schemes can be used:
For using the blast furnace of the distributing mode of central coke charcoal, it is 1750 as certain smelted the dischargeable capacity in high-Ti type V-Ti magnetic ore deposit
m3Blast furnace, when its charging system isTime, wherein O represents ore, C generation
Table coke, α represents that distributor chute is in corresponding cloth angle, and such as charging system first row numeral, represents and work as distributor chute
When being in the cloth angle of 34 °, the number of turns that corresponding ore should rotate when carrying out chute cloth is 2 circles, and corresponding coke is carried out
The number of turns that should rotate during chute cloth is 4 circles.Load coke toward furnace throat when generally cloth angle is 21 ° and can be considered central coke charcoal；
It is 2000m as certain smelted the dischargeable capacity in high-Ti type V-Ti magnetic ore deposit3Blast furnace, when its charging system isTime, load coke toward furnace throat when usual cloth angle is 26 ° and can be considered that center adds
Coke.
For center adds fluorite or manganese ore, use the distributing mode identical with central coke charcoal, i.e. use and central coke phase
Same angle and coke concurrently or separately add in stove.As being 1750m for above-mentioned dischargeable capacity3Blast furnace, can by coke fill
Loading in batch can by fluorite or manganese ore again after entering in batch can, so when loading coke toward furnace throat, fluorite or manganese ore just can be at clothes
It is simultaneously charged into the charge level position closest to furnace throat center with coke when angle is 21 °；It is 2000m for above-mentioned dischargeable capacity3's
Blast furnace, after the same method, fluorite or manganese ore just can be simultaneously charged into charge level closest to stove when cloth angle is 26 ° with coke
The position at larynx center.As fluorite or manganese ore individually load in stove, the most first fluorite or manganese ore are individually loaded in batch can, rotation is slipped
Individually load in furnace throat when groove is placed in corresponding cloth angle；As being 1750m for above-mentioned dischargeable capacity3Blast furnace, by fluorite or
After manganese ore individually loads in batch can, will turn chute rotate to cloth angle be 21 ° time, open batch can and load fluorite or manganese ore；Right
It is 2000m in above-mentioned dischargeable capacity3Blast furnace, after fluorite or manganese ore are individually loaded in batch can, will turn chute rotate to cloth angle
When degree is 26 °, opens batch can and load fluorite or manganese ore.As fluorite or manganese ore are simultaneously charged in stove with iron-bearing material or coke,
Then first iron-bearing material or coke should be loaded batch can, the most again fluorite or manganese ore be loaded in batch can, so fill from batch can when furnace charge
When entering in furnace throat, fluorite or manganese ore will finally load furnace throat；For using the blast furnace of chute cloth, still can be by fluorite
Or manganese ore loads the position near furnace throat center.
Owing to fluorite and manganese ore can reduce the melting temperature of slag to varying degrees, by the way of being added, load stove by center
Interior fluorite or manganese ore constantly decline along with smelting process and participate in slag making, are first to make local (mainly near cupola well center)
CaF in blast furnace slag2Or MnO content raises.With without CaF2Or MnO or the relatively low slag of its content compare, containing higher CaF2
Or the melting temperature of slag piled up of the slag iron mixing Hou Shi center piled up with cupola well center of the slag of MnO content and viscosity number fall
Low, but owing to its physical temperature is relatively low, its shortage of heat bringing cupola well center into, make the physical temperature of cupola well center slag iron enter
The risk that one step reduces increases.Not enough for compensating the cupola well center physical temperature caused therefrom, fluorite or manganese ore is added at center
While, it is impossible to stop the measure of central coke charcoal, and should continue to use central coke charcoal, keep or increase cupola well central coke
Quantity, improve the ventilative liquid permeability at cupola well center, enable the more more successfully ventilating coal gas stream of heat that air port fuel tape produces
Arrive cupola well center.So, the heat obtained at cupola well center deposit is identical or while increased, due to center slag iron
Melting temperature and viscosity number reduce, mobility improve, be more easy to flowing and leave cupola well central area, thus reach eliminate stove
The purpose that center is piled up.
Wherein, continue to use central coke charcoal, keep or increase the quantity of cupola well central coke, during concrete operations, can basis
Actual conditions increase the coke cloth number of turns, or increase coke batch weight.It is such as 2000m to certain dischargeable capacity3Blast furnace as a example by, its
Ore batch weight is 56 tons/batches, and coke batch weight is 10.561 tons/batches, and burden distribution system is:Height
Stove, when cloth angle is 26 °, the coke institute cloth number of turns is still 3.5 circles or encloses more than 3.5；Wherein do not increase Jiao when 26 °
The charcoal cloth number of turns, when remaining as 3.5 circle, then can increase coke batch weight and be larger than 10.561 tons/batches.
After the slag iron that in use cupola well center is piled up by heart interpolation fluorite or manganese ore eliminates, these CaF2Or MnO content is the highest
Slag can be diffused into other region of cupola well to some extent, until it reaches furnace wall.So, the slag gradually melted out from cupola well center
In CaF2Or MnO content will be gradually lowered, and the CaF in the blast furnace slag in whole cupola well2Or MnO content then will raise accordingly.
Such as CaF in blast furnace slag2Or MnO too high levels, slag viscosity reduces too much, and furnace wall can produce more serious washing away, harm height
The furnace superintendent longevity.Therefore, for preventing slag viscosity too low, what blast furnace should be not too much makes fluorite or manganese ore, so that CaF in slag2Or MnO
Content is the highest.Piling up for reaching to eliminate cupola well center, that does not the most endanger prolonging campaign so spends consideration, center add fluorite or
The amount of manganese ore, should ensure that CaF in the blast furnace slag in whole cupola well region2Content is in 0.10%～3.0%, MnO content be in 0.5%～
Between 6.0%.
Fluorite or the frequency of manganese ore are added in center, can often batch shaft furnace charging time all add, it is also possible to be spaced the addition of multiple batches of material,
And interval batch also can follow specific rule, but change according to actual needs.Have only to pack whole cupola well region
CaF in blast furnace slag2Content is in 0.10%～3.0%, and MnO content is between 0.5%～6.0%.
The present invention adds fluorite or the quantity of manganese ore, comprehensive other technologies means by reasonable arrangement center, it is possible to perfect solution stove
The problem that cylinder center is piled up.
Detailed description of the invention
Below in conjunction with embodiments of the invention, the invention will be further elaborated.
Embodiment 1:
As with certain dischargeable capacity as 2000m3Blast furnace as a example by, its ore batch weight is 56 tons/batch, coke batch weight is 10.561 tons/
Batch, burden distribution system is:Stockline 1.6m, feed grade 49.98%, slag iron
Ratio about 635kg/t.When blast furnace will appear from the symptom piled up at cupola well center or after having there is hearth accumulation, center is taked to add firefly
Stone or manganese ore.
Such as CaF in fluorite2Content is 84.5%, fluorite addition be every batch of ore deposit 0.020～0.700 ton/batch.When using fluorite list
Solely during cloth, after coke is loaded furnace throat by blast furnace, then distributor chute is rotated to the angle that angle is 26 ° or less, by firefly
Stone is placed through distributor chute and loads in stove.When using fluorite to be simultaneously charged in stove with ore, first ore is entirely enclosed in batch can
In, the most again fluorite is loaded in batch can；During cloth, first by predetermined cloth angle and the cloth number of turns, ore is sequentially loaded into stove
In, finally being rotated by distributor chute to angle is 26 ° or a certain less angle set, and now fluorite will be with the most remaining
Ore together loads furnace throat in predetermined angle.When using fluorite to be simultaneously charged in stove with coke, first coke is entirely enclosed in material
In tank, the most again fluorite is loaded in batch can；During cloth, first by predetermined cloth angle and the cloth number of turns, coke is sequentially loaded into
In stove, finally when distributor chute rotate to angle be 26 °, will be with a small amount of remaining coke together at predetermined angle dress by fluorite
Enter furnace throat；Or distributor chute is rotated to predetermined a certain less angle, now fluorite together will exist with a small amount of remaining coke
Predetermined angle loads furnace throat.According to actual needs, fluorite can be continuously added to when every batch feeds, it is possible to be spaced certain criticizing
Number, such as 3 batches, 5 batches, 10 the most multiple batches of additions.
As in manganese ore, Mn content is 18.5%, manganese ore addition be every batch of ore deposit 0.300～5.000 tons/batch.When using, manganese ore is independent
During cloth, after coke is loaded furnace throat by blast furnace, then distributor chute is rotated to the angle that angle is 26 ° or less, by manganese ore
It is placed through distributor chute to load in blast furnace.When using manganese ore to be simultaneously charged in stove with ore, first ore is entirely enclosed in batch can
In, the most again manganese ore is loaded in batch can；During cloth, first by predetermined cloth angle and the cloth number of turns, ore is sequentially loaded into stove
In, finally being rotated by distributor chute to angle is 26 ° or a certain less angle set, and now manganese ore will be with the most remaining
Ore together loads furnace throat in predetermined angle.When using manganese ore to be simultaneously charged in stove with coke, first coke is entirely enclosed in material
In tank, the most again manganese ore is loaded in batch can；During cloth, first by predetermined cloth angle and the cloth number of turns, coke is sequentially loaded into
In stove, finally when distributor chute rotate to angle be 26 °, will be with a small amount of remaining coke together at predetermined angle dress by manganese ore
Enter furnace throat；Or distributor chute is rotated to predetermined a certain less angle, now fluorite together will exist with a small amount of remaining coke
Predetermined angle loads furnace throat.According to actual needs, manganese ore can be continuously added to when every batch feeds, it is possible to be spaced certain criticizing
Number, such as 3 batches, 5 batches, 10 the most multiple batches of additions.
Although reference be made herein to invention has been described for the explanatory embodiment of the present invention, and it is preferable that above-described embodiment is only the present invention
Embodiment, embodiments of the present invention are also not restricted to the described embodiments, it should be appreciated that those skilled in the art are permissible
Designing a lot of other amendments and embodiment, these amendments and embodiment will fall in spirit disclosed in the present application and essence
Within god.
Claims (4)
1. one kind eliminates the method that cupola well center is piled up, it is characterised in that: will be containing CaF2Or the raw material of MnO is with the shape of lump ore
Formula adds to cupola well centre, improves CaF in the slag in blast furnace crucibe centre2Or the content of MnO, reduce in cupola well
The melting temperature of the slag that heart position is piled up and viscosity number, improve mobility, eliminates cupola well center and piles up.
Eliminate the method that cupola well center is piled up the most according to claim 1, it is characterised in that: described containing CaF2Former
Material is fluorite, and the raw material containing MnO is manganese ore.
Eliminate the method that cupola well center is piled up the most according to claim 2, it is characterised in that: described fluorite or manganese ore are necessary
Join blast furnace crucibe centre.
Eliminate the method that cupola well center is piled up the most according to claim 3, it is characterised in that:
The concrete cloth scheme that described fluorite or manganese ore join blast furnace crucibe centre is as follows:
For center adds fluorite or manganese ore, use the distributing mode identical with central coke charcoal, i.e. use and central coke
Identical angle concurrently or separately adds in stove with coke or ore；Fluorite or the amount of manganese ore are added in center, should ensure that whole stove
CaF in the blast furnace slag in cylinder region2Content is in 0.10%～3.0%, and MnO content is between 0.5%～6.0%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610341160.1A CN105886681A (en) | 2016-05-19 | 2016-05-19 | Method for removing accumulation of center of blast furnace hearth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610341160.1A CN105886681A (en) | 2016-05-19 | 2016-05-19 | Method for removing accumulation of center of blast furnace hearth |
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| CN105886681A true CN105886681A (en) | 2016-08-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110305999A (en) * | 2019-07-16 | 2019-10-08 | 山东钢铁股份有限公司 | A kind of metallized charge and its application method of the accumulation of processing blast furnace crucibe |
| CN110438274A (en) * | 2019-09-19 | 2019-11-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Fluorine-containing slag system containing manganese for blast furnace process |
| CN114672600A (en) * | 2022-04-20 | 2022-06-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for eliminating accumulation of vanadium-titanium ore blast furnace smelting hearth center |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110305999A (en) * | 2019-07-16 | 2019-10-08 | 山东钢铁股份有限公司 | A kind of metallized charge and its application method of the accumulation of processing blast furnace crucibe |
| CN110305999B (en) * | 2019-07-16 | 2021-03-26 | 山东钢铁股份有限公司 | Metallized furnace charge for treating blast furnace hearth accumulation and using method thereof |
| CN110438274A (en) * | 2019-09-19 | 2019-11-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Fluorine-containing slag system containing manganese for blast furnace process |
| CN114672600A (en) * | 2022-04-20 | 2022-06-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for eliminating accumulation of vanadium-titanium ore blast furnace smelting hearth center |
| CN114672600B (en) * | 2022-04-20 | 2023-08-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for eliminating central accumulation of smelting hearth of vanadium titanium ore blast furnace |
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Application publication date: 20160824 |