CN106480246A - A kind of method for operating blast furnace using iron coke as part furnace charge - Google Patents
A kind of method for operating blast furnace using iron coke as part furnace charge Download PDFInfo
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Abstract
It is the method for operating blast furnace as part furnace charge for the iron coke that the present invention discloses a kind of new furnace charge, carry out blast furnace operating production in this way, new furnace charge iron coke can rationally be utilized in blast furnace production process, blast furnace is made to reach stable smooth operation, low consumption is long-lived, ironmaking production cost can be reduced simultaneously again, accomplish economic smelting.
Description
Technical field
The invention belongs to ironmaking technology field in steel and iron industry, particularly to one kind using iron coke as part furnace charge, in conjunction with using high
The operational approach of stove combining upper and lower means.
Background technology
In recent years with the continuous progress and development of technology and equipment, field of metallurgy also occurs in that some new Technologies, especially
It is field of smelting before ferrum, occur in that the new technologies such as direct-reduction and the melting and reducing of heavy industrialization.But with Market Situation
Deterioration, for metallurgical production process at this stage, from resource, economy and operability, blast furnace is as
Main iron-smelting process, remains and does not replace, and global more than 80% molten iron is remained and obtained by blast furnace ironmaking, and
Still there is the technology space improving further in blast furnace technology.In recent years, under metallargist's unremitting effort, also occur in that
The furnace charge of some new models, such as iron coke, coal-pressing ball, carbonaceous pelletizing etc., the appearance of these new furnace charges, change over
Traditional blast furnace burden form, also will establish the developing direction of furnace charge of future generation so that blast furnace technology is still constantly improving
In evolution, on the basis of Inherent advantage, shine thriving development life.From the consistent production technology of blast fumance,
Rely on own situation and resources reserve advantage, substantially all define more fixing furnace charge collocation form both at home and abroad, such as high alkalinity burns
The mix and match form of several furnace charges of knot ore deposit, pellet and lump ore, and also define more fixing operation on this basis
Method, and obtain good application effect.The traditional blast furnace furnace charge of contrast, these new furnace charges, such as iron coke, how in height
Receive rational application in the actual production of stove, be the not little together difficult problem leaving metallargist in reality for.And with regard to Novel furnace
Material iron coke how reasonable employment in blast furnace, is all rarely reported both at home and abroad, even if a small amount of use being mentioned to iron coke, is also big
Part is it to be simply considered that be a kind of coke, and Japan is compared with one of early country proposing this new furnace charge of iron coke, is also to close
In more one of the country of applied research in this respect, they pass through the small-scale test using laboratory or semi-industrial, must tap a blast furnace
The important conclusion that Jiao can not simply use as blast furnace coke, Japan also once attempted top dress on small blast furnace and carried out class
As test, though obtain certain effect, because test is too small with the effective heat size of blast furnace, only several cubic meters, for large-scale
Blast furnace uses this new furnace charge of iron coke, has no too big actual reference.Using which type of means and measure, make ferrum
At home and abroad large blast furnace obtains the most reasonably using Jiao, is one of problem of metallargist's concern the most now.
Because iron coke is as a kind of one of more novel furnace charge, more to this concern and research both at home and abroad, but major part be all with
Based on the manufacture of iron coke, predominantly stay in iron coke be how to produce and iron coke produce manufacturing equipment on.Have not yet more to become at present
Use technology in blast furnace for the ripe finished product iron coke, on the basis of having ready conditions, does not enable iron coke using technical great
Break through.
Technical scheme
The technical problem to be solved is to adopt the needs of new furnace charge development trend according to following blast furnace, provides a kind of new
Type furnace charge is the method for operating blast furnace as part furnace charge for the iron coke, carries out blast furnace operating production in this way, can give birth in blast furnace
Rationally utilize new furnace charge iron coke during product, make blast furnace reach stable smooth operation, low consumption is long-lived, ironmaking can be reduced simultaneously again
Production cost, accomplishes economic smelting.
A kind of method for operating blast furnace using iron coke as part furnace charge, is realized by techniques below scheme：
1st, a kind of using iron coke as the method for operating blast furnace of part furnace charge it is characterised in that：Iron coke as blast furnace part furnace charge,
By the chute inclination angle on the basis of original BF Design, prolong A ° to extending out, iron coke is entered stove separately as a kind of furnace charge, add matter
Amount percentage must not exceed the 50% of quality of furnace charge percentage, and feeding density charcoal amount reduces percent mass ratio and adds for iron coke
The C of percent mass ratio, and reduce blast-furnace tuyere area, air port area reduction ratio and iron coke addition account for total quality of furnace charge hundred
Between point ratio, both assume PA corresponding relation；After the charging of furnace roof batch can charging method, slipped using non material bell cloth rotation
Groove mode is entered to be about to iron coke and is arranged between furnace throat edge and furnace throat and stock column center, rather than is arranged into blast furnace center, ferrum simultaneously
The burnt cloth number of turns at furnace throat must not exceed 4 circles, and at furnace throat, cloth doses must not exceed the 1/3 of iron coke furnace entering volume；Enter in iron coke
While stove, adjust bottom operating duty, be added to the stove blow rate required, air quantity increases ratio and adds percent mass ratio for iron coke
BW；Reduce coal powder blowing amount, coal injection amount reduces the SC that scope adds percent mass ratio for iron coke；Increase in air blast
Oxygen content, oxygen content increases the CO that scope adds percent mass ratio for iron coke, increases hot blast temperature, and hot blast temperature increases model
Enclose the ST adding percent mass ratio for iron coke, increase basicity of slag, basicity increases scope and adds percent mass ratio for iron coke
AI.
Its chute inclination angle extension angle is carried out by following formula：A °=0.5 °+IC × K1；Feeding density charcoal reduces mass percent
Example is carried out by following formula：C=IC × K2；Air port area reduces ratio and carries out by following formula：PA=IC × K3；Blast wind
Amount increase ratio is carried out by following formula：BW=IC × K4；Coal injection amount reduces ratio and carries out by following formula：SC=IC
×K5；Oxygen content increases ratio and carries out by following formula：CO=IC × 0.7K6；Hot blast temperature increases ratio and carries out by following formula：
ST=IC × K7；Basicity of slag increases ratio and carries out by following formula：AI=IC × K8.
In formula：
IC：Dirt mud ferrum carbon ball adds percent mass ratio, %；A°：Chute inclination angle extension angle, °, K1Coefficient, value
Scope 4～10；C：Feeding density charcoal reduces percent mass ratio, %, K2Coefficient, span 0.1～0.7；PA：Wind
Open area reduces ratio, %, K3Coefficient, span 0.1～0.3；BW：Blasting air quantity increases ratio, %, K4System
Number, span 0.1～0.3；SC：Coal injection amount reduces ratio, %, K5Coefficient, span 0.1～0.4；
CO：Oxygen content increases ratio, %, K6Coefficient, span 0.3～0.8；ST：Hot blast temperature increases ratio, %, K7
Coefficient, span 0.1～0.3；AI：Basicity of slag increases ratio, %, K7Coefficient, span 0.05～0.2.
2nd, a kind of using iron coke as the method for operating blast furnace of part furnace charge it is characterised in that：On the basis of original BF Design
Chute inclination angle, prolongs A ° to extending out, iron coke as blast furnace part furnace charge, with sintering deposit, pellet, one kind of lump ore or several
Plant furnace charge to load in mixture, add percent mass ratio to must not exceed the 40% of quality of furnace charge percentage when loading in mixture, feeding density charcoal amount subtracts
Few percent mass ratio adds the C of percent mass ratio for iron coke；And reduce blast-furnace tuyere area, air port area reduction ratio with
Iron coke addition assumes PA linear corresponding relation both accounting between total quality of furnace charge percentage；Using furnace roof batch can charging method
After charging, enter to be about to iron coke using non material bell cloth swivel chute mode and be arranged between furnace throat margin and center coke stock column, and
Non- be arranged into blast furnace center and furnace throat edge, the cloth number of turns at furnace throat for the Ore must not exceed 5 circles simultaneously；Furnace throat Ore
Place must not exceed the 1/2 of Ore furnace entering volume, while iron coke enters stove, is added to stove air quantity, and air quantity increases ratio and adds for iron coke
Enter the BW of percent mass ratio；Reduce coal powder blowing amount, coal injection reduces scope and adds percent mass ratio for iron coke
SC；Increase oxygen content in air blast, oxygen content increases the CO that scope adds percent mass ratio for iron coke, increases hot blast temperature,
Hot blast temperature increases the ST that scope adds percent mass ratio for iron coke, increases basicity of slag, and basicity increases scope and adds for iron coke
Enter the AI of percent mass ratio.
Its chute inclination angle extension angle is carried out by following formula：A °=0.5 °+IC × K1；Feeding density charcoal reduces mass percent
Example is carried out by following formula：C=IC × K2；Air port area reduces ratio and carries out by following formula：PA=IC × K3；Blast wind
Amount increase ratio is carried out by following formula：BW=IC × K4；Coal injection amount reduces ratio and carries out by following formula：SC=IC
×K5；Oxygen content increases ratio and carries out by following formula：CO=IC × 0.7K6；Hot blast temperature increases ratio and carries out by following formula：
ST=IC × K7；Basicity of slag increases ratio and carries out by following formula：AI=IC × K8.
In formula：
IC：Iron coke adds percent mass ratio, %；A°：Chute inclination angle extension angle, °, K1Coefficient, span 3～
9；C：Feeding density charcoal reduces percent mass ratio, %, K2Coefficient, span 0.1～0.6；PA：Air port area reduces
Ratio, %, K3Coefficient, span 0.1～0.25；BW：Blasting air quantity increases ratio, %, K4Coefficient, value model
Enclose 0.1～0.3；SC：Coal injection amount reduces ratio, %, K5Coefficient, span 0.1～0.4；CO：Oxygen content
Increase ratio, %, K6Coefficient, span 0.3～0.8；ST：Hot blast temperature increases ratio, %, K7Coefficient, value
Scope 0.1～0.3；AI：Basicity of slag increases ratio, %, K7Coefficient, span 0.05～0.2.
Described iron coke as part furnace charge method for operating blast furnace, wherein, in iron coke carbon weight/mass percentage composition be 20%～
70%th, metallic iron weight/mass percentage composition 20%～70%, other element weight/mass percentage composition are less than 30%, enter stove iron coke Task-size Controlling
Scope is 5～50cm, hot reactivity can be 20%～60%, iron coke cold conditions for drum strength after 20%～60%, hot reaction
Resist and pound intensity M40For 50%～90%, wear-resisting intensity M10For 5%～30%.
As part furnace charge method for operating blast furnace, wherein, chute inclination angle stretches out described iron coke, is arranged into stove for Ore
Larynx edge, increases furnace throat edge Ore consumption, suitably increases edge, reduces iron coke and adds back edge Gas Flow scouring intensity.
Described iron coke, as part furnace charge method for operating blast furnace, wherein, reduces blast-furnace tuyere area, for improving into stove wind speed,
Strengthen blast energy, improve hot blast penetrance in stove；It is added to the stove blow rate required, is used for blowing central coke stock column alive, improve high
The breathability of the dead stock column of stove, improves smooth operation of furnace state.
Described iron coke, as part furnace charge method for operating blast furnace, wherein, due to the factor of carbon containing in iron coke, reduces blast-furnace coal powder
Injection amount, for reducing fuel ratio, reduces fuel consumption；Increase oxygen content in air blast, for improving iron coke and coal dust firing feelings
Condition, reduces fuel consumption, reduces the generation of gas flowrate in bosh simultaneously.
Described iron coke, as part furnace charge method for operating blast furnace, wherein, increases hot blast temperature, is used for being added to stove heat, changes
Kind coal dust firing situation.
Described iron coke, as part furnace charge method for operating blast furnace, wherein, causes sulfur content in furnace charge to increase because iron coke enters stove,
Increase basicity of slag, for improving blast furnace desulphurizing ability, improve operating condition of blast furnace.
Carry out blast furnace operating in this way, utilization new furnace charge iron coke that can be relatively reasonable, blast furnace can be reached steady simultaneously again
Determine direct motion, the purpose of low consumption longevity, wherein, after the method operating blast furnaces, blast furnace is produced ton rail fuel consumption and reduces by 3
More than kilogram, ton ferrum production cost declines more than 5 yuan.
Specific embodiment
Below by some embodiments, the present invention is further described.
Illustrate with reference to specific embodiment：
1 embodiment 1 (certain steel plant 2580m3Illustrate as a example blast furnace)
1.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 1.
Table 1 iron coke performance, %
A kind of method for operating blast furnace, is taken iron coke as a kind of furnace charge individually entering stove, and is not loaded in mixture with other species furnace charges into stove,
The iron coke basis physical and chemical performance analysis being used are shown in Table 1, carry out blast furnace process.
1.2 furnace charge collocation forms
The furnace charge collocation form of blast furnace feeding is shown in Table 2.
Table 2 furnace charge collocation form, %
Depending on iron coke as a kind of independent furnace charge, chute inclination angle prolongs 2 ° to extending out, and iron coke is loaded feed bin, is transported by main belt
Deliver to furnace top material tank for blast furnace, specified location is arranged into by the burden distribution system of invention requirement by bellless distributor and swivel chute
Afterwards, other furnace charges enter stove and enter stove according to specified charging system, carry out blast furnace process, and wherein, furnace charge collocation form is according to entering stove stove
Expect mass percent to determine, wherein sintering deposit is 56.0%, pellet is 16.0%, lump ore is 4.0%, iron coke is 4.0%,
Ordinary metallurgical coke is 20.0%.
The change of 1.3 operating duties
The change of blast furnace operating system is shown in Table 3.
Table 3 operating duty changes
Iron coke is thrown in blast furnace as a kind of independent furnace charge, for adapt to new furnace charge enter stove smelting work, blast furnace operating
System needs respective change, and wherein on original blast furnace foundation, air port area reduces 0.01m2, air quantity increase
240m3/ min, oxygen enrichment percentage increases by 0.12%, coal ejection ratio minimizing 3.2kg/t, burden distribution system and basicity of slag and accordingly improves, with suitable
Answer new blast furnace operating system.
1.4 blast furnace implementation results
Blast furnace adopt iron coke as part furnace charge after, the metallurgical effect of blast furnace is shown in Table 4.
Effect after the enforcement of table 4 blast furnace
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased, fuel ratio can be obtained
Reduce, gas utilization rate improves, and reaches blast furnace stable smooth operation, final acquirement reduces ironmaking production cost effectiveness and purpose.
2 embodiment 2 (certain steel plant 2580m3Illustrate as a example blast furnace)
2.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 5.
Table 5 iron coke performance, %
A kind of method for operating blast furnace, takes the mode that iron coke and sintering deposit load in mixture to enter stove, and the iron coke basis physicochemical property being used divides
Analysis is shown in Table 5, carries out blast furnace process.
2.2 furnace charge collocation forms
The furnace charge collocation form of blast furnace feeding is shown in Table 6.
Table 6 furnace charge collocation form, %
Iron coke and sintering deposit are loaded feed bin, chute inclination angle prolongs 4 ° to extending out, and is transported to furnace top material tank for blast furnace by main belt,
Be arranged into after specified location by bellless distributor and swivel chute by the burden distribution system of invention requirement, other furnace charges enter stove according to
Specified charging system enters stove, carries out blast furnace process, and wherein, furnace charge collocation form to determine according to entering stove quality of furnace charge percentage ratio,
Wherein sintering deposit is 52.0%, and pellet is 14.0%, and lump ore is 6.0%, and iron coke is 8.0%, and ordinary metallurgical coke is 20.0%.
The change of 2.3 operating duties
The change of blast furnace operating system is shown in Table 7.
Table 7 operating duty changes
Iron coke is thrown in blast furnace as being loaded in mixture with sintering deposit, enters stove smelting work, blast furnace operating system for adapt to new furnace charge
Degree needs respective change, and wherein on original blast furnace foundation, air port area reduces 0.03m2, air quantity increase 480m3/min,
Oxygen enrichment percentage increases by 0.24%, coal ejection ratio minimizing 4.8kg/t, burden distribution system and basicity of slag and accordingly improves, to adapt to new blast furnace behaviour
Make system.
2.4 blast furnace implementation results
Blast furnace adopt iron coke as part furnace charge after, the metallurgical effect of blast furnace is shown in Table 8.
Effect after the enforcement of table 8 blast furnace
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased, fuel ratio can be obtained
Reduce, gas utilization rate improves, and reaches blast furnace stable smooth operation, final acquirement reduces ironmaking production cost effectiveness and purpose.
3 embodiment 3 (certain steel plant 3200m3Illustrate as a example blast furnace)
3.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 9.
Table 9 iron coke performance, %
A kind of method for operating blast furnace, takes the mode that iron coke and pellet load in mixture to enter stove, and the iron coke basis physicochemical property being used divides
Analysis is shown in Table 5, carries out blast furnace process..
3.2 furnace charge collocation forms
The furnace charge collocation form of blast furnace feeding is shown in Table 10.
Table 10 furnace charge collocation form, %
Iron coke and pellet are loaded feed bin, chute inclination angle prolongs 3 ° to extending out, and is transported to furnace top material tank for blast furnace by main belt,
Be arranged into after specified location by bellless distributor and swivel chute by the burden distribution system of invention requirement, other furnace charges enter stove according to
Specified charging system enters stove, carries out blast furnace process, and wherein, furnace charge collocation form to determine according to entering stove quality of furnace charge percentage ratio,
Wherein sintering deposit is 56.0%, and pellet is 10.0%, and lump ore is 4.0%, and iron coke is 10.0%, and ordinary metallurgical coke is 20.0%.
The change of 3.3 operating duties
The change of blast furnace operating system is shown in Table 11.
Table 11 operating duty changes
Iron coke is thrown in blast furnace as being loaded in mixture with pellet, enters stove smelting work, blast furnace operating system for adapt to new furnace charge
Degree needs respective change, and wherein on original blast furnace foundation, air port area reduces 0.03m2, air quantity increase 487m3/ min,
Oxygen enrichment percentage increases by 0.11%, coal ejection ratio minimizing 7kg/t, burden distribution system and basicity of slag and accordingly improves, to adapt to new blast furnace behaviour
Make system.
3.4 blast furnace implementation results
Blast furnace adopt iron coke as part furnace charge after, the metallurgical effect of blast furnace is shown in Table 12.
Effect after the enforcement of table 12 blast furnace
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased, fuel ratio can be obtained
Reduce, gas utilization rate improves, and reaches blast furnace stable smooth operation, final acquirement reduces ironmaking production cost effectiveness and purpose.
4 embodiment 4 (certain steel plant 3200m3Illustrate as a example blast furnace)
4.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 13.
Table 13 iron coke performance, %
A kind of method for operating blast furnace, takes iron coke and lump ore to load in mixture the iron coke basis physical and chemical performance analysis into stove, being used and is shown in Table 13,
Carry out blast furnace process.
4.2 furnace charge collocation forms
The furnace charge collocation form of blast furnace feeding is shown in Table 14.
Table 14 furnace charge collocation form, %
Iron coke and lump ore are loaded feed bin, chute inclination angle prolongs 5 ° to extending out, and is transported to furnace top material tank for blast furnace by main belt, leads to
Cross bellless distributor and swivel chute and be arranged into after specified location by the burden distribution system of invention requirement, other furnace charges enter stove according to finger
Determine charging system and enter stove, carry out blast furnace process, wherein, furnace charge collocation form to determine according to entering stove quality of furnace charge percentage ratio, its
Middle sintering deposit is 52%, and pellet is 0%, and lump ore is 8%, and iron coke is 20%, and ordinary metallurgical coke is 20%.
The change of 4.3 operating duties
The change of blast furnace operating system is shown in Table 15.
Table 15 operating duty changes
Iron coke is thrown in blast furnace as being loaded in mixture with lump ore, enters stove smelting work, blast furnace operating system for adapt to new furnace charge
Need respective change, wherein on original blast furnace foundation, air port area reduces 0.04m2, air quantity increase 244m3/ min,
Oxygen enrichment percentage increases by 0.11%, coal ejection ratio minimizing 5kg/t, burden distribution system and basicity of slag and accordingly improves, to adapt to new blast furnace behaviour
Make system.
4.4 blast furnace implementation results
Blast furnace adopt iron coke as part furnace charge after, the metallurgical effect of blast furnace is shown in Table 16.
Effect after the enforcement of table 16 blast furnace
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased, fuel ratio can be obtained
Reduce, gas utilization rate improves, and reaches blast furnace stable smooth operation, final acquirement reduces ironmaking production cost effectiveness and purpose.
5 embodiment 5 (certain steel plant 4038m3Illustrate as a example blast furnace)
5.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 17.
Table 17 iron coke performance, %
A kind of method for operating blast furnace, takes iron coke and sintering deposit, pellet to load in mixture the iron coke basis physicochemical property into stove, being used and divides
Analysis is shown in Table 13, carries out blast furnace process.
5.2 furnace charge collocation forms
The furnace charge collocation form of blast furnace feeding is shown in Table 18.
Table 18 furnace charge collocation form, %
Iron coke is mixed loading feed bin with sintering deposit, pellet, chute inclination angle is prolonged 2 ° to extending out, is transported to height by main belt
Stove furnace roof batch can, is arranged into after specified location by bellless distributor and swivel chute by the burden distribution system of invention requirement, other
Furnace charge enters stove and enters stove according to specified charging system, carries out blast furnace process, and wherein, furnace charge collocation form is according to entering stove quality of furnace charge hundred
Ratio is divided to determine, wherein sintering deposit is 40%, pellet is 20%, lump ore is 0%, iron coke is 20%, ordinary metallurgical coke
For 20%.
The change of 5.3 operating duties
The change of blast furnace operating system is shown in Table 19.
Table 19 operating duty changes
Iron coke and sintering deposit, pellet are loaded in mixture and throws in blast furnace, enter stove smelting work for adapt to new furnace charge, blast furnace is grasped
Need respective change as system, wherein on original blast furnace foundation, air port area reduces 0.05m2, air quantity increase
171m3/ min, oxygen enrichment percentage increases by 0.20%, coal ejection ratio minimizing 11kg/t, burden distribution system and basicity of slag and accordingly improves, to adapt to
New blast furnace operating system.
5.4 blast furnace implementation results
Blast furnace adopt iron coke as part furnace charge after, the metallurgical effect of blast furnace is shown in Table 20.
Effect after the enforcement of table 20 blast furnace
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased, fuel ratio can be obtained
Reduce, gas utilization rate improves, and reaches blast furnace stable smooth operation, final acquirement reduces ironmaking production cost effectiveness and purpose.
6 embodiment 6 (certain steel plant 4038m3Illustrate as a example blast furnace)
6.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 21.
Table 21 iron coke performance, %
A kind of method for operating blast furnace using iron coke as part furnace charge, takes iron coke to load in mixture into stove with sintering deposit, pellet and lump ore,
The iron coke basis physical and chemical performance analysis being used are shown in Table 21, carry out blast furnace process.
6.2 furnace charge collocation forms
The furnace charge collocation form of blast furnace feeding is shown in Table 22.
Table 22 furnace charge collocation form, %
Iron coke is mixed loading feed bin with sintering deposit, pellet, lump ore, chute inclination angle is prolonged 1 ° to extending out, transported by main belt
Deliver to furnace top material tank for blast furnace, specified location is arranged into by the burden distribution system of invention requirement by bellless distributor and swivel chute
Afterwards, other furnace charges enter stove and enter stove according to specified charging system, carry out blast furnace process, and wherein, furnace charge collocation form is according to entering stove stove
Expect mass percent to determine, wherein sintering deposit is 40%, pellet is 6%, lump ore is 4%, iron coke is 30%, commonly
Smelter coke is 20%.
The change of 6.3 operating duties
The change of blast furnace operating system is shown in Table 23.
Table 23 operating duty changes
Iron coke is thrown in blast furnace as being loaded in mixture with sintering deposit, pellet, lump ore, enters stove smelter for adapt to new furnace charge
Make, blast furnace operating system needs respective change, and wherein on original blast furnace foundation, air port area reduces 0.06m2, wind
Amount increases 261m3/ min, oxygen enrichment percentage increases by 0.15%, coal ejection ratio minimizing 13kg/t, burden distribution system and basicity of slag and accordingly improves,
To adapt to new blast furnace operating system.
6.4 blast furnace implementation results
Blast furnace adopt iron coke as part furnace charge after, the metallurgical effect of blast furnace is shown in Table 24.
Effect after the enforcement of table 24 blast furnace
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased, fuel ratio can be obtained
Reduce, gas utilization rate improves, and reaches blast furnace stable smooth operation, final acquirement reduces ironmaking production cost effectiveness and purpose.
Claims (2)
1. a kind of using iron coke as the method for operating blast furnace of part furnace charge it is characterised in that：Iron coke as blast furnace part furnace charge,
By the chute inclination angle on the basis of original BF Design, prolong A ° to extending out, iron coke is entered stove separately as a kind of furnace charge, add matter
Amount percentage must not exceed the 50% of quality of furnace charge percentage, and feeding density charcoal amount reduces percent mass ratio and adds for iron coke
The C of percent mass ratio, and reduce blast-furnace tuyere area, air port area reduction ratio and iron coke addition account for total quality of furnace charge hundred
Between point ratio, both assume PA corresponding relation；After the charging of furnace roof batch can charging method, slipped using non material bell cloth rotation
Groove mode is entered to be about to iron coke and is arranged between furnace throat edge and furnace throat and stock column center, simultaneously the cloth number of turns at furnace throat for the iron coke
Must not exceed 4 circles, at furnace throat, cloth doses must not exceed the 1/3 of iron coke furnace entering volume；While iron coke enters stove, adjustment bottom behaviour
Make system, be added to the stove blow rate required, air quantity increases the BW that ratio adds percent mass ratio for iron coke；Reduce coal powder blowing amount,
Coal injection amount reduces the SC that scope adds percent mass ratio for iron coke；Increase oxygen content in air blast, oxygen content increases scope
Add the CO of percent mass ratio for iron coke, increase hot blast temperature, hot blast temperature increases scope and adds mass percent for iron coke
The ST of example, increases basicity of slag, and basicity increases the AI that scope adds percent mass ratio for iron coke；
Its chute inclination angle extension angle is carried out by following formula：A °=0.5 °+IC × K1；Feeding density charcoal reduces mass percent
Example is carried out by following formula：C=IC × K2；Air port area reduces ratio and carries out by following formula：PA=IC × K3；Blast wind
Amount increase ratio is carried out by following formula：BW=IC × K4；Coal injection amount reduces ratio and carries out by following formula：SC=IC
×K5；Oxygen content increases ratio and carries out by following formula：CO=IC × 0.7K6；Hot blast temperature increases ratio and carries out by following formula：
ST=IC × K7；Basicity of slag increases ratio and carries out by following formula：AI=IC × K8；
In formula：
IC：Dirt mud ferrum carbon ball adds percent mass ratio, %；A°：Chute inclination angle extension angle, °, K1Coefficient, value
Scope 4～10；C：Feeding density charcoal reduces percent mass ratio, %, K2Coefficient, span 0.1～0.7；PA：Wind
Open area reduces ratio, %, K3Coefficient, span 0.1～0.3；BW：Blasting air quantity increases ratio, %, K4System
Number, span 0.1～0.3；SC：Coal injection amount reduces ratio, %, K5Coefficient, span 0.1～0.4；
CO：Oxygen content increases ratio, %, K6Coefficient, span 0.3～0.8；ST：Hot blast temperature increases ratio, %, K7
Coefficient, span 0.1～0.3；AI：Basicity of slag increases ratio, %, K7Coefficient, span 0.05～0.2.
2. a kind of using iron coke as the method for operating blast furnace of part furnace charge it is characterised in that：On the basis of original BF Design
Chute inclination angle, prolongs A ° to extending out, iron coke as blast furnace part furnace charge, with sintering deposit, pellet, one kind of lump ore or several
Plant furnace charge to load in mixture, add percent mass ratio to must not exceed the 40% of quality of furnace charge percentage when loading in mixture, feeding density charcoal amount subtracts
Few percent mass ratio adds the C of percent mass ratio for iron coke；And reduce blast-furnace tuyere area, air port area reduction ratio with
Iron coke addition assumes PA linear corresponding relation both accounting between total quality of furnace charge percentage；Using furnace roof batch can charging method
After charging, enter to be about to iron coke using non material bell cloth swivel chute mode and be arranged between furnace throat margin and center coke stock column, with
When the cloth number of turns at furnace throat for the Ore must not exceed 5 circles；The 1/2 of Ore furnace entering volume is must not exceed, in iron coke at furnace throat Ore
While entering stove, it is added to stove air quantity, air quantity increases the BW that ratio adds percent mass ratio for iron coke；Reduce breeze blowing
Amount, coal injection reduces the SC that scope adds percent mass ratio for iron coke；Increase oxygen content in air blast, oxygen content increases model
Enclose the CO adding percent mass ratio for iron coke, increase hot blast temperature, hot blast temperature increases scope and adds percent mass for iron coke
The ST of ratio, increases basicity of slag, and basicity increases the AI that scope adds percent mass ratio for iron coke；
Its chute inclination angle extension angle is carried out by following formula：A °=0.5 °+IC × K1；Feeding density charcoal reduces mass percent
Example is carried out by following formula：C=IC × K2；Air port area reduces ratio and carries out by following formula：PA=IC × K3；Blast wind
Amount increase ratio is carried out by following formula：BW=IC × K4；Coal injection amount reduces ratio and carries out by following formula：SC=IC
×K5；Oxygen content increases ratio and carries out by following formula：CO=IC × 0.7K6；Hot blast temperature increases ratio and carries out by following formula：
ST=IC × K7；Basicity of slag increases ratio and carries out by following formula：AI=IC × K8；
In formula：
IC：Iron coke adds percent mass ratio, %；A°：Chute inclination angle extension angle, °, K1Coefficient, span 3～
9；C：Feeding density charcoal reduces percent mass ratio, %, K2Coefficient, span 0.1～0.6；PA：Air port area reduces
Ratio, %, K3Coefficient, span 0.1～0.25；BW：Blasting air quantity increases ratio, %, K4Coefficient, value model
Enclose 0.1～0.3；SC：Coal injection amount reduces ratio, %, K5Coefficient, span 0.1～0.4；CO：Oxygen content
Increase ratio, %, K6Coefficient, span 0.3～0.8；ST：Hot blast temperature increases ratio, %, K7Coefficient, value
Scope 0.1～0.3；AI：Basicity of slag increases ratio, %, K7Coefficient, span 0.05～0.2.
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