CN106480246B - It is a kind of using iron coke as the method for operating blast furnace of part furnace charge - Google Patents
It is a kind of using iron coke as the method for operating blast furnace of part furnace charge Download PDFInfo
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Abstract
The present invention discloses a kind of new furnace charge i.e. method for operating blast furnace of the iron coke as part furnace charge, blast furnace operating production is carried out in this way, new furnace charge iron coke can be rationally 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 again simultaneously, accomplishes economic smelting.
Description
Technical field
It is more particularly to a kind of using iron coke as part furnace charge the invention belongs to ironmaking technology field in steel and iron industry, with reference to
Using the operating method of blast furnace combining upper and lower means.
Background technology
In recent years with the continuous progress and development of technology and equipment, also there are some new technique skills in field of metallurgy
There are the new processes such as the direct-reduction of heavy industrialization and melting and reducing in art, the field of smelting particularly before iron.But with
The deterioration of Market Situation, for metallurgical production process at this stage, from resource, economy and operability, blast furnace
It is as most important iron-smelting process, remains what is do not replaced, global more than 80% molten iron is still to be obtained by blast furnace ironmaking
It arrives, and blast furnace technology still remains the technology space further improved.In recent years, under metallargist's unremitting effort,
Also there is the furnace charge of some new models, such as iron coke, coal-pressing ball, carbonaceous pelletizing, the appearance of these new furnace charges changes
Blast furnace burden form traditional in the past, will also establish the developing direction of next-generation furnace charge so that blast furnace technology is not still
During disconnected progress, on the basis of Inherent advantage, shine thriving development life.Work is always produced from blast fumance
From the point of view of in skills, own situation and resources reserve advantage are relied on, substantially all forms relatively fixed furnace charge collocation form both at home and abroad,
Such as the mix and match form of several furnace charges of high basicity sinter, pellet and lump ore, and also form on this basis compared with
For fixed operating method, and obtain good application effect.The traditional blast furnace furnace charge of comparison, these new furnace charges, such as iron
How coke receives rational application in the actual production of blast furnace, is the problem not small together for leaving metallargist in reality for.
And on new furnace charge iron coke how in blast furnace reasonable employment, be all rarely reported both at home and abroad, even if a small amount of is mentioned to iron coke
Use and it is most of be it to be simply considered that be a kind of coke, Japan is compared with early proposition this new furnace charge of iron coke
One of country and on more one of the country of application study in this respect, they are by using laboratory or semi-industrial
Small-scale test, draw the important conclusion that iron coke cannot be used simply as blast furnace coke, Japan also once attempted
Top dress carries out similar experiment on small blast furnace, though obtaining certain effect, since the effective heat size of experiment blast furnace is too small, is only
Several cubic meters for large blast furnace using this new furnace charge of iron coke, have no too big actual reference.Using what
The means of sample and measure, making iron coke, at home and abroad large blast furnace obtains the most reasonably using, is that metallargist is the most now
One of the problem of concern.
Since iron coke is as a kind of one of more novel furnace charge, this is paid close attention to and studied both at home and abroad is more but most of
All be based on the manufacture with iron coke predominantly stay in iron coke be how to produce and the manufacturing equipment of iron coke production on.At present not yet
There is use technology of the more mature finished product iron coke in blast furnace, on the basis of having had ready conditions, fail to realize that iron coke utilizes skill
Important breakthrough in art.
Technical solution
The technical problems to be solved by the invention are that the needs of new furnace charge development trend are used according to following blast furnace, are provided
A kind of method for operating blast furnace of new furnace charge, that is, iron coke as part furnace charge carries out blast furnace operating production in this way, can
Rationally using new furnace charge iron coke in blast furnace production process, blast furnace is made to reach stable smooth operation, low consumption is long-lived, while again can be with
Ironmaking production cost is reduced, accomplishes economic smelting.
It is a kind of using iron coke as the method for operating blast furnace of part furnace charge, be to be realized by following technical solution：
It is 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 is as blast furnace part
Furnace charge by the chute inclination angle on the basis of original BF Design, prolongs A ° to extending out, and iron coke is entered stove separately as a kind of furnace charge, is added
Enter percent mass ratio must not exceed quality of furnace charge percentage 50%, it is iron coke that feeding density charcoal amount, which reduces percent mass ratio,
The C of percent mass ratio is added in, and reduces blast-furnace tuyere area, air port area reduction ratio accounts for total furnace charge matter with iron coke addition
PA correspondences are presented in the two between measuring percentage；After being fed using furnace roof batch can charging method, revolved using non material bell cloth
Turn chute mode and be arranged between furnace throat edge and furnace throat and stock column center rather than be arranged into blast furnace center into iron coke is about to,
The cloth number of turns of the iron coke at furnace throat must not exceed 4 circles simultaneously, and cloth doses must not exceed the 1/3 of iron coke furnace entering volume at furnace throat；
While iron coke enters stove, lower part operating duty is adjusted, is added to the stove blow rate required, air quantity increases ratio and adds in quality percentage for iron coke
The BW of ratio；Coal powder blowing amount is reduced, coal injection amount reduces the SC that scope adds in percent mass ratio for iron coke；Increase air blast
Middle oxygen content, oxygen content increase the CO that scope adds in percent mass ratio for iron coke, increase hot blast temperature, and hot blast temperature increases model
The ST that percent mass ratio is added in for iron coke is enclosed, increases basicity of slag, basicity increases scope and adds in 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 quality percentage
Ratio is carried out by following formula：C=IC × K2；Air port area reduces ratio to be carried out by following formula：PA=IC × K3；Blast wind
Increase ratio is measured to carry out by following formula：BW=IC × K4；Coal injection amount reduces ratio and is carried out by following formula：SC=IC ×
K5；Oxygen content increases ratio and is carried out by following formula：CO=IC × 0.7K6；Hot blast temperature increases than being carried out by following formula：ST
=IC × K7；Basicity of slag increases ratio to be carried out by following formula：AI=IC × K8。
In formula：
IC：Dirt mud iron carbon ball adds in percent mass ratio, %；A°：Chute inclination angle extension angle, °, K1Coefficient, value model
Enclose 4~10；C：Feeding density charcoal reduces percent mass ratio, %, K2Coefficient, value range 0.1~0.7；PA：Air port area reduces
Ratio, %, K3Coefficient, value range 0.1~0.3；BW：Blasting air quantity increases ratio, %, K4Coefficient, value range 0.1~
0.3；SC：Coal injection amount reduces ratio, %, K5Coefficient, value range 0.1~0.4；CO：Oxygen content increases ratio, %, K6System
Number, value range 0.3~0.8；ST：Hot blast temperature increases ratio, %, K7Coefficient, value range 0.1~0.3；AI：Clinker alkali
Spend increase ratio, %, K7Coefficient, value range 0.05~0.2.
It is 2nd, a kind of using iron coke as the method for operating blast furnace of part furnace charge, it is characterised in that：By original BF Design basis
On chute inclination angle, prolong A ° to extending out, iron coke as blast furnace part furnace charge, with sinter, pellet, lump ore one kind or several
Kind furnace charge loads in mixture, and percent mass ratio is added in when loading in mixture and must not exceed the 40% of quality of furnace charge percentage, feeding density charcoal amount subtracts
Few percent mass ratio adds in the C of percent mass ratio for iron coke；And reduce blast-furnace tuyere area, air port area reduction ratio with
PA linear corresponding relations are presented in the two between iron coke addition accounts for total quality of furnace charge percentage；Using furnace roof batch can charging method
After charging, using non material bell cloth swivel chute mode into being about between iron coke is arranged into furnace throat margin and center coke stock column,
Rather than blast furnace center and furnace throat edge are arranged into, while the cloth number of turns of the ore at furnace throat must not exceed 5 circles；Furnace throat ore deposit
It must not exceed the 1/2 of ore furnace entering volume at stone, while iron coke enters stove, be added to stove air quantity, it is iron coke that air quantity, which increases ratio,
Add in the BW of percent mass ratio；Coal powder blowing amount is reduced, coal injection reduces scope and adds in percent mass ratio for iron coke
SC；Increase oxygen content in air blast, oxygen content increases the CO that scope adds in percent mass ratio for iron coke, increases hot blast temperature, heat
Air temperature increases the ST that scope adds in percent mass ratio for iron coke, increases basicity of slag, and basicity increases scope and added in for iron coke
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 quality percentage
Ratio is carried out by following formula：C=IC × K2；Air port area reduces ratio to be carried out by following formula：PA=IC × K3；Blast wind
Increase ratio is measured to carry out by following formula：BW=IC × K4；Coal injection amount reduces ratio and is carried out by following formula：SC=IC ×
K5；Oxygen content increases ratio and is carried out by following formula：CO=IC × 0.7K6；Hot blast temperature increases than being carried out by following formula：ST
=IC × K7；Basicity of slag increases ratio to be carried out by following formula：AI=IC × K8。
In formula：
IC：Iron coke adds in percent mass ratio, %；A°：Chute inclination angle extension angle, °, K1Coefficient, value range 3~9；
C：Feeding density charcoal reduces percent mass ratio, %, K2Coefficient, value range 0.1~0.6；PA：Air port area reduction ratio, %,
K3Coefficient, value range 0.1~0.25；BW：Blasting air quantity increases ratio, %, K4Coefficient, value range 0.1~0.3；SC：Spray
It blows coal dust amount and reduces ratio, %, K5Coefficient, value range 0.1~0.4；CO：Oxygen content increases ratio, %, K6Coefficient, value model
Enclose 0.3~0.8；ST：Hot blast temperature increases ratio, %, K7Coefficient, value range 0.1~0.3；AI：Basicity of slag increases ratio
Example, %, K7Coefficient, value range 0.05~0.2.
The iron coke as part furnace charge method for operating blast furnace, wherein, carbon mass percentage is in iron coke
20%~70%, metallic iron mass percentage 20%~70%, other element mass percentages are less than 30%, enter stove iron coke
Granularity control range is 5~50cm, hot reactivity can be after 20%~60%, hot reaction drum strength be 20%~
60%th, iron coke cold conditions, which resists, pounds intensity M40For 50%~90%, wear-resistant strength M10For 5%~30%.
The iron coke as part furnace charge method for operating blast furnace, wherein, chute inclination angle extends outwardly, for ore arrange
To furnace throat edge, increase furnace throat edge ore dosage, suitably aggravate edge, reduce iron coke addition back edge Gas Flow and wash away
Intensity.
The iron coke as part furnace charge method for operating blast furnace, wherein, reduce blast-furnace tuyere area, for improving into stove
Wind speed enhances blast energy, improves hot wind penetrability in stove；The stove blow rate required is added to, for blowing central coke stock column living, is changed
The gas permeability of the dead stock column of kind blast furnace, improves smooth operation of furnace state.
The iron coke as part furnace charge method for operating blast furnace, wherein, due to factor carbon containing in iron coke, reduce blast furnace
Coal powder blowing amount for reducing fuel ratio, reduces fuel consumption；Increase oxygen content in air blast, for improving iron coke and coal dust combustion
Burning situation reduces fuel consumption, while reduces the generation of gas flowrate in bosh.
The iron coke as part furnace charge method for operating blast furnace, wherein, increase hot blast temperature, for be added to stove heat
Amount improves coal dust firing situation.
The iron coke as part furnace charge method for operating blast furnace, wherein, cause sulfur content in furnace charge since iron coke enters stove
Increase, increase basicity of slag, for improving blast furnace desulphurizing ability, improve operating condition of blast furnace.
Blast furnace operating is carried out in this way, the new furnace charge iron coke of utilization that can be relatively reasonable, while can reach again
The purpose of blast furnace stable smooth operation, low consumption longevity, wherein, after the method operating blast furnaces, blast furnace produces a ton rail fuel consumption
3 kilograms or more are reduced, ton iron production cost declines 5 yuan or more.
Specific embodiment
Below by some embodiments, the present invention is further described.
It is illustrated with reference to specific embodiment：
1 embodiment, 1 (certain steel plant 2580m3Illustrate exemplified by blast furnace)
1.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 1.
1 iron coke performance of table, %
A kind of method for operating blast furnace takes iron coke as a kind of furnace charge for individually entering stove, without being loaded in mixture with other species furnace charges
Enter stove, used iron coke basis physical and chemical performance analysis 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.
2 furnace charge collocation form of table, %
Depending on iron coke as a kind of independent furnace charge, chute inclination angle prolongs 2 ° to extending out, and iron coke is packed into feed bin, passes through main belt
Furnace top material tank for blast furnace is transported to, specific bit is arranged by the burden distribution system of invention requirement by bellless distributor and swivel chute
It postponing, other furnace charges enter stove and enter stove according to specified charging system, carry out blast furnace process, wherein, furnace charge collocation form is according to entering stove
Quality of furnace charge percentage determines that wherein sinter is 56.0%, pellet 16.0%, lump ore 4.0%, and iron coke is
4.0%, ordinary metallurgical coke is 20.0%.
The variation of 1.3 operating duties
The variation of blast furnace operating system is shown in Table 3.
3 operating duty of table changes
It is launched iron coke as a kind of independent furnace charge in blast furnace, the stove that enters to adapt to new furnace charge smelts work, high
Stove operating duty needs that respective change occurs, 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 reduction 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
After blast furnace uses iron coke as part furnace charge, the metallurgical effect of blast furnace is shown in Table 4.
Effect after 4 blast furnace of table is implemented
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased can be obtained, is fired
Than reducing, gas utilization rate improves material, reaches blast furnace stable smooth operation, and final obtain reduces ironmaking production cost effectiveness and purpose.
2 embodiment, 2 (certain steel plant 2580m3Illustrate exemplified by blast furnace)
2.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 5.
5 iron coke performance of table, %
A kind of method for operating blast furnace takes iron coke to enter stove, used iron coke basis physics and chemistry with the mode that sinter loads in mixture
Performance evaluation 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.
6 furnace charge collocation form of table, %
Iron coke and sinter are packed into feed bin, chute inclination angle prolongs 4 ° to extending out, and State of Blast Furnace liftout is transported to by main belt
Tank, after being arranged into designated position by the burden distribution system of invention requirement by bellless distributor and swivel chute, other furnace charges enter
Stove enters stove according to specified charging system, carries out blast furnace process, wherein, furnace charge collocation form is next according to stove quality of furnace charge percentage is entered
It determines, wherein sinter is 52.0%, pellet 14.0%, lump ore 6.0%, iron coke 8.0%, and ordinary metallurgical coke is
20.0%.The variation of 2.3 operating duties
The variation of blast furnace operating system is shown in Table 7.
7 operating duty of table changes
It is launched using iron coke as being loaded in mixture with sinter in blast furnace, the stove that enters to adapt to new furnace charge smelts work, blast furnace
Operating duty needs that respective change occurs, 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 reduction 4.8kg/t, burden distribution system and basicity of slag and accordingly improves, with suitable
Answer new blast furnace operating system.
2.4 blast furnace implementation results
After blast furnace uses iron coke as part furnace charge, the metallurgical effect of blast furnace is shown in Table 8.
Effect after 8 blast furnace of table is implemented
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased can be obtained, is fired
Than reducing, gas utilization rate improves material, reaches blast furnace stable smooth operation, and final obtain reduces ironmaking production cost effectiveness and purpose.
3 embodiment, 3 (certain steel plant 3200m3Illustrate exemplified by blast furnace)
3.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 9.
9 iron coke performance of table, %
A kind of method for operating blast furnace takes iron coke to enter stove, used iron coke basis physics and chemistry with the mode that pellet loads in mixture
Performance evaluation 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.
10 furnace charge collocation form of table, %
Iron coke and pellet are packed into feed bin, chute inclination angle prolongs 3 ° to extending out, and State of Blast Furnace liftout is transported to by main belt
Tank, after being arranged into designated position by the burden distribution system of invention requirement by bellless distributor and swivel chute, other furnace charges enter
Stove enters stove according to specified charging system, carries out blast furnace process, wherein, furnace charge collocation form is next according to stove quality of furnace charge percentage is entered
It determines, wherein sinter is 56.0%, pellet 10.0%, lump ore 4.0%, iron coke 10.0%, ordinary metallurgical coke
For 20.0%.The variation of 3.3 operating duties
The variation of blast furnace operating system is shown in Table 11.
11 operating duty of table changes
It is launched using iron coke as being loaded in mixture with pellet in blast furnace, the stove that enters to adapt to new furnace charge smelts work, blast furnace
Operating duty needs that respective change occurs, 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 reduction 7kg/t, burden distribution system and basicity of slag and accordingly improves, to adapt to
New blast furnace operating system.
3.4 blast furnace implementation results
After blast furnace uses iron coke as part furnace charge, the metallurgical effect of blast furnace is shown in Table 12.
Effect after 12 blast furnace of table is implemented
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased can be obtained, is fired
Than reducing, gas utilization rate improves material, reaches blast furnace stable smooth operation, and final obtain reduces ironmaking production cost effectiveness and purpose.
4 embodiment, 4 (certain steel plant 3200m3Illustrate exemplified by blast furnace)
4.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 13.
13 iron coke performance of table, %
A kind of method for operating blast furnace takes iron coke to be loaded in mixture with lump ore into stove, and used iron coke basis physical and chemical performance analysis are shown in
Table 13 carries out blast furnace process.
4.2 furnace charge collocation forms
The furnace charge collocation form of blast furnace feeding is shown in Table 14.
14 furnace charge collocation form of table, %
Iron coke and lump ore are packed into feed bin, chute inclination angle prolongs 5 ° to extending out, and furnace top material tank for blast furnace is transported to by main belt,
After being arranged into designated position by the burden distribution system of invention requirement by bellless distributor and swivel chute, other furnace charges enter stove by
Enter stove according to specified charging system, carry out blast furnace process, wherein, furnace charge collocation form comes really according to stove quality of furnace charge percentage is entered
Fixed, wherein sinter is 52%, pellet 0%, lump ore 8%, iron coke 20%, and ordinary metallurgical coke is 20%.
The variation of 4.3 operating duties
The variation of blast furnace operating system is shown in Table 15.
15 operating duty of table changes
It is launched using iron coke as being loaded in mixture with lump ore in blast furnace, the stove that enters to adapt to new furnace charge smelts work, blast furnace behaviour
It needs that respective change occurs as system, 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 reduction 5kg/t, burden distribution system and basicity of slag and accordingly improves, to adapt to new height
Stove operating duty.
4.4 blast furnace implementation results
After blast furnace uses iron coke as part furnace charge, the metallurgical effect of blast furnace is shown in Table 16.
Effect after 16 blast furnace of table is implemented
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased can be obtained, is fired
Than reducing, gas utilization rate improves material, reaches blast furnace stable smooth operation, and final obtain reduces ironmaking production cost effectiveness and purpose.
5 embodiment, 5 (certain steel plant 4038m3Illustrate exemplified by blast furnace)
5.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 17.
17 iron coke performance of table, %
A kind of method for operating blast furnace takes iron coke to be loaded in mixture with sinter, pellet into stove, used iron coke basis physics and chemistry
Energy analysis 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.
18 furnace charge collocation form of table, %
Iron coke is mixed with sinter, pellet and is packed into feed bin, chute inclination angle prolongs 2 ° to extending out, and is transported to by main belt
Furnace top material tank for blast furnace, after being arranged into designated position by the burden distribution system of invention requirement by bellless distributor and swivel chute,
Other furnace charges enter stove and enter stove according to specified charging system, carry out blast furnace process, wherein, furnace charge collocation form is according to entering stove furnace charge matter
Percentage is measured to determine, wherein sinter is 40%, pellet 20%, lump ore 0%, iron coke 20%, and ordinary metallurgical is burnt
Charcoal is 20%.
The variation of 5.3 operating duties
The variation of blast furnace operating system is shown in Table 19.
19 operating duty of table changes
Iron coke and sinter, pellet are loaded in mixture and launched in blast furnace, the stove that enters to adapt to new furnace charge smelts work, high
Stove operating duty needs that respective change occurs, 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 reduction 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
After blast furnace uses iron coke as part furnace charge, the metallurgical effect of blast furnace is shown in Table 20.
Effect after 20 blast furnace of table is implemented
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased can be obtained, is fired
Than reducing, gas utilization rate improves material, reaches blast furnace stable smooth operation, and final obtain reduces ironmaking production cost effectiveness and purpose.
6 embodiment, 6 (certain steel plant 4038m3Illustrate exemplified by blast furnace)
6.1 iron coke performances
Iron coke basis physicochemical property is shown in Table 21.
21 iron coke performance of table, %
It is a kind of using iron coke as the method for operating blast furnace of part furnace charge, iron coke is taken to be loaded in mixture with sinter, pellet and lump ore
Enter stove, used iron coke basis physical and chemical performance analysis 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.
22 furnace charge collocation form of table, %
Iron coke is mixed with sinter, pellet, lump ore and is packed into feed bin, chute inclination angle prolongs 1 ° to extending out, and passes through main belt
Furnace top material tank for blast furnace is transported to, specific bit is arranged by the burden distribution system of invention requirement by bellless distributor and swivel chute
It postponing, other furnace charges enter stove and enter stove according to specified charging system, carry out blast furnace process, wherein, furnace charge collocation form is according to entering stove
Quality of furnace charge percentage determines that wherein sinter is 40%, pellet 6%, lump ore 4%, iron coke 30%, common smelting
Golden coke is 20%.
The variation of 6.3 operating duties
The variation of blast furnace operating system is shown in Table 23.
23 operating duty of table changes
It is launched using iron coke as being loaded in mixture with sinter, pellet, lump ore in blast furnace, enters stove smelting for adapt to new furnace charge
Work is refined, blast furnace operating system needs that respective change occurs, wherein on original blast furnace foundation, air port area reduces 0.06m2、
Air quantity increases 261m3/ min, oxygen enrichment percentage increase by 0.15%, coal ejection ratio reduction 13kg/t, burden distribution system and basicity of slag and accordingly carry
Height, to adapt to new blast furnace operating system.
6.4 blast furnace implementation results
After blast furnace uses iron coke as part furnace charge, the metallurgical effect of blast furnace is shown in Table 24.
Effect after 24 blast furnace of table is implemented
After iron coke is as part blast furnace furnace charge, blast furnace process is carried out using the method, output increased can be obtained, is fired
Than reducing, gas utilization rate improves material, reaches blast furnace stable smooth operation, and final obtain reduces ironmaking production cost effectiveness and purpose.
Claims (2)
- It is 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 into stove separately as a kind of furnace charge, adds in quality Percentage must not exceed the 50% of quality of furnace charge percentage, and feeding density charcoal amount reduces percent mass ratio and adds in matter for iron coke The C of percentage is measured, and reduces blast-furnace tuyere area, air port area reduction ratio accounts for total quality of furnace charge percentage with iron coke addition PA correspondences are presented both between ratio；After feeding using furnace roof batch can charging method, non material bell cloth swivel chute is utilized Mode is arranged into iron coke is about between furnace throat edge and furnace throat and stock column center, while the cloth number of turns of the iron coke at furnace throat 4 circles are must not exceed, cloth doses must not exceed the 1/3 of iron coke furnace entering volume at furnace throat；While iron coke enters stove, the operation of adjustment lower part System, is added to the stove blow rate required, and air quantity increases the BW that ratio adds in percent mass ratio for iron coke；Reduce coal powder blowing amount, spray It blows coal dust amount and reduces the SC that scope adds in percent mass ratio for iron coke；Increase oxygen content in air blast, oxygen content increases scope and is Iron coke adds in the CO of percent mass ratio, increases hot blast temperature, and hot blast temperature increases scope and adds in percent mass ratio for iron coke ST, increase basicity of slag, basicity increase scope for iron coke add in percent mass ratio AI；Its chute inclination angle extension angle is carried out by following formula：A °=0.5 °+IC × K1；Feeding density charcoal reduces percent mass ratio It is carried out by following formula：C=IC × K2；Air port area reduces ratio to be carried out by following formula：PA=IC × K3；Blast air quantity increasing Ratio is added to be carried out by following formula：BW=IC × K4；Coal injection amount reduces ratio and is carried out by following formula：SC=IC × K5；Contain Oxygen amount increases ratio and is carried out by following formula：CO=IC × 0.7K6；Hot blast temperature increases than being carried out by following formula：ST=IC ×K7；Basicity of slag increases ratio to be carried out by following formula：AI=IC × K8；In formula：IC：Iron coke adds in percent mass ratio, %；A°：Chute inclination angle extension angle, °, K1Coefficient, value range 4~10；C：Enter Oven coke reduces percent mass ratio, %, K2Coefficient, value range 0.1~0.7；PA：Air port area reduces ratio, %, K3System Number, value range 0.1~0.3；BW：Blasting air quantity increases ratio, %, K4Coefficient, value range 0.1~0.3；SC：Injection coal Powder amount reduces ratio, %, K5Coefficient, value range 0.1~0.4；CO：Oxygen content increases ratio, %, K6Coefficient, value range 0.3~0.8；ST：Hot blast temperature increases ratio, %, K7Coefficient, value range 0.1~0.3；AI：Basicity of slag increases ratio Example, %, K8Coefficient, value range 0.05~0.2.
- It is 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 sinter, pellet, lump ore one or more of stoves Material loads in mixture, and percent mass ratio is added in when loading in mixture and must not exceed the 40% of quality of furnace charge percentage, feeding density charcoal amount reduces matter Measure the C that percentage adds in percent mass ratio for iron coke；And blast-furnace tuyere area is reduced, air port area reduction ratio and iron coke PA linear corresponding relations are presented in the two between addition accounts for total quality of furnace charge percentage；It is fed using furnace roof batch can charging method Afterwards, using non material bell cloth swivel chute mode into being about between iron coke is arranged into furnace throat margin and center coke stock column, simultaneously The cloth number of turns of the ore at furnace throat must not exceed 5 circles；It must not exceed the 1/2 of ore furnace entering volume at furnace throat ore, enter in iron coke While stove, stove air quantity is added to, air quantity increases the BW that ratio adds in percent mass ratio for iron coke；Reduce coal powder blowing amount, Coal injection reduces the SC that scope adds in percent mass ratio for iron coke；Increase oxygen content in air blast, oxygen content increases scope and is Iron coke adds in the CO of percent mass ratio, increases hot blast temperature, and hot blast temperature increases scope and adds in percent mass ratio for iron coke ST, increase basicity of slag, basicity increase scope for iron coke add in percent mass ratio AI；Its chute inclination angle extension angle is carried out by following formula：A °=0.5 °+IC × K1；Feeding density charcoal reduces percent mass ratio It is carried out by following formula：C=IC × K2；Air port area reduces ratio to be carried out by following formula：PA=IC × K3；Blast air quantity increasing Ratio is added to be carried out by following formula：BW=IC × K4；Coal injection amount reduces ratio and is carried out by following formula：SC=IC × K5；Contain Oxygen amount increases ratio and is carried out by following formula：CO=IC × 0.7K6；Hot blast temperature increases than being carried out by following formula：ST=IC ×K7；Basicity of slag increases ratio to be carried out by following formula：AI=IC × K8；In formula：IC：Iron coke adds in percent mass ratio, %；A°：Chute inclination angle extension angle, °, K1Coefficient, value range 3~9；C：Enter Oven coke reduces percent mass ratio, %, K2Coefficient, value range 0.1~0.6；PA：Air port area reduces ratio, %, K3System Number, value range 0.1~0.25；BW：Blasting air quantity increases ratio, %, K4Coefficient, value range 0.1~0.3；SC：Injection coal Powder amount reduces ratio, %, K5Coefficient, value range 0.1~0.4；CO：Oxygen content increases ratio, %, K6Coefficient, value range 0.3~0.8；ST：Hot blast temperature increases ratio, %, K7Coefficient, value range 0.1~0.3；AI：Basicity of slag increases ratio Example, %, K8Coefficient, value range 0.05~0.2.
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