CN105506203B - A kind of blast furnace blowing-in burdening method - Google Patents
A kind of blast furnace blowing-in burdening method Download PDFInfo
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- CN105506203B CN105506203B CN201510983215.4A CN201510983215A CN105506203B CN 105506203 B CN105506203 B CN 105506203B CN 201510983215 A CN201510983215 A CN 201510983215A CN 105506203 B CN105506203 B CN 105506203B
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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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Abstract
The invention discloses a kind of blast furnace blowing-in burdening method, the furnace burdening of blast furnace is divided into four sections, is respectively weedtree section, net burnt section, empty burnt section, regular burden(ing) section；By loading hardwood in weedtree section, the well done material blow-on of sleeper is substituted using hardwood, clinker growing amount can be substantially reduced, improve the gas permeability of cohesive zone, especially when the 6~10 of blow-on initial stage is small, shorten cohesive zone and form the time, accelerate blow-on process, stablize the direct motion state of blast furnace.Load coke in net burnt section, it is empty burnt in empty burnt section loading, and meet empty burnt conditions of mixture ratios：Clinker dual alkalinity R2=1.05, CaF in slag2Between 2~6%, [Si]=2.5% in molten iron.Load regular burden(ing) in regular burden(ing) section, regular burden(ing) proportioning is met condition：Clinker dual alkalinity R2=1.1, CaF in slag2Between 2~6%, [Si]=4% in molten iron, slag ratio is less than 400kg/thm, and iron charge load level is maintained within 2.5.
Description
Technical field
This application involves metallurgical engineering technical field of blast furnace ironmaking, more particularly to a kind of blast furnace blowing-in burdening method.
Background technology
Blast furnace opening loads the proportioning of material and distribution mode is the core technology of blast furnace opening, and determines that blast furnace opening is smooth
Suitable key point.Traditional blast-furnace burden is more auxiliary as major ingredient, Fluorspar Additives, silica etc. using sinter, pellet, lump ore
Material, general requirement control Al in slag2O3Content, and by improving slag ratio to clinker is diluted, ensure that possessing for clinker is good
Mobility.In addition, also by adding manganese ore, to have the function that to dilute slag iron.Such as in blast furnace medium-capital overhauling blown in burden method
In, it is desirable to the total -3400kg/ tons of iron of coke ratio 3000kg/ tons of iron of blow-on material；Slag iron compares 1300kg/thm-1400kg/thm；Slag coke ratio
0.38-0.45；Clinker Al2O3Content≤18%.And in another blast furnace blowing-in burdening method, then reached using manganese ore is added
To the effect of dilution slag iron.
But above-mentioned blow-in method can cause that supplies consumption is more, slag ratio is high, coke ratio consumption is also higher.Further, since furnace charge
The unreasonable gas permeability for often influencing stock column of structure, pressure difference is high during causing blow-on, occurs collapsing the accidents such as material, hanging,
Cause to be forced a large amount of checkings during blow-on, seriously affect blow-on and reach production process.
The content of the invention
Distribution invention provides a kind of quick blow-on of blast furnace up to production, is made with solving the unreasonable of burden structure
The technical problem having some setbacks into blow-on.
In order to solve the above technical problems, the present invention provides a kind of new four sections of blow in burden methods of blast furnace, including weedtree
Section, net burnt section, empty burnt section and regular burden(ing) section.By the composition structure of four sections of furnace charges of optimization and the spatial altitude of four sections of furnace charges, come
Achieve the purpose that accurately to control blow-on process.
The invention discloses a kind of blast furnace blowing-in burdening method, the furnace burdening of the blast furnace is divided into four sections, is respectively weedtree
Section, net burnt section, empty burnt section, regular burden(ing) section；
Load hardwood in the weedtree section；Wherein, cupola well ladle heel layer to cupola well air port center line is the weedtree section；
Load coke in the net burnt section；Wherein, cupola well air port center line with the middle part of the furnace bosh to be described net burnt
Section；
Load in the empty burnt section empty burnt；It is described empty burnt including coke, fluorite, lime stone；To shaft in the middle part of the furnace bosh
Predeterminated position is the empty burnt section；In the empty burnt section, the empty burnt proportioning of charging meets that condition is：Clinker dual alkalinity R2=
1.05, CaF in slag2Between 2~6%, [Si]=2.5% in molten iron；
Load regular burden(ing) in the regular burden(ing) section；Wherein, the regular burden(ing) includes：Coke, sinter, pellet, fluorite；
The shaft predeterminated position to furnace throat stockline predeterminated position is the regular burden(ing) section；In the regular burden(ing) section, regular burden(ing) proportioning
Meet condition：Clinker dual alkalinity R2=1.1, CaF in slag2Between 2~6%, [Si]=4% in molten iron, slag ratio is less than
400kg/thm, iron charge load level are maintained within 2.5.
Preferably, the shaft predeterminated position is on the basis of edge on furnace bosh, and along up 3-5 meters on furnace bosh
Place；
The furnace throat stockline predeterminated position is below furnace throat stockline at 2 meters.
Preferably, the coke, the fluorite, the proportioning of the lime stone three are：32:4:1 or 32:5：2
Preferably, in the regular burden(ing) section, the ratio of the pellet is more than 55%.
Preferably, the specification of the hardwood is 200 × 600mm of φ
Preferably, the regular burden(ing) Duan Zhongke adds net Jiao, and net coke (per) charge number is handed over by the way of progressively successively decreasing with regular burden(ing)
Fork compartment of terrain is distributed into stove.
Preferably, CaF in the fluorite2＞ 50% containing mass percent.
Preferably, general assembly pan feeding requirement：Within the total coke ratio 3.2t/thm of blow-on, clinker dual alkalinity R2=0.9-1.0, slag
Middle CaF2 is between 2~6%, [Si]=4% in molten iron, and full clinker ratio is less than 800kg/thm.
By one or more technical solution of the present invention, the invention has the advantages that or advantage：
(1) the well done material blow-on of sleeper is substituted using hardwood, clinker growing amount can be substantially reduced, improve the saturating of cohesive zone
Gas, especially when the 6~10 of blow-on initial stage is small, shortens cohesive zone and forms the time, accelerate blow-on process, stablize the suitable of blast furnace
Row state.(2) lower slag ratio blow-on can obtain more qualified iron, while greatly reduce the use of this kind of miscellaneous material of manganese ore, into one
Step reduces blow-on cost.(3) since the blow-on quantity of slag is few, then on the premise of coke ratio is certain, the slag iron into cupola well can obtain
The temperature of higher is obtained, to ensure that cupola well obtains sufficient heat.(4) it can delay the time of first time iron, see slag after foreknowledge iron,
Ensure the reasonable flow of slag iron.
Brief description of the drawings
Fig. 1 is the structure diagram of the furnace burdening section of blast furnace in the embodiment of the present invention；
Fig. 2 is blast furnace blowing-in burdening method implementation process figure of the embodiment of the present invention.
Embodiment
In order to make the application the technical staff in the technical field be more clearly understood that the application, below in conjunction with the accompanying drawings,
Technical scheme is described in detail by specific embodiment.
In embodiments of the present invention, a kind of blast furnace blowing-in burdening method is disclosed.
In the blast furnace blowing-in burdening method of the embodiment of the present invention, referring to Fig. 1, the furnace burdening of blast furnace is divided into four sections, point
Wei not weedtree section, net burnt section, empty burnt section, regular burden(ing) section.
Fig. 1 specifically is refer to, is the schematic diagram of four sections of division.
The cupola well ladle heel layer to cupola well air port center line is weedtree section.
Cupola well air port center line with the middle part of the furnace bosh for the net burnt section.
The furnace bosh middle part to shaft predeterminated position is the empty burnt section.Specifically, shaft predeterminated position is in stove
On waist on the basis of, and along up at 3-5 rice on furnace bosh.
The shaft predeterminated position to furnace throat stockline predeterminated position is the regular burden(ing) section.Furnace throat stockline predeterminated position is stove
Below larynx stockline at 2 meters.
Referring specifically to Fig. 2, specific distribution is just introduced below.
The first step, loads hardwood in weedtree section.
Specifically, the specification of hardwood is 200 × 600mm of φ, easy to load in stove.Load from air port in stove, load
Highly to air port center line.The well done material blow-on of sleeper is substituted using hardwood, blow-on cost can be reduced, accelerates blow-on process.
Second, load coke in net burnt section.
Net Jiao's section：Load the rational dry coke quenching of index.
3rd step, loads empty burnt in empty burnt section.
It is empty burnt including coke, fluorite, lime stone.
Empty Jiao's section is to ensure clinker dual alkalinity R2=1.05, CaF in slag2Between 2~6%, [Si] in molten iron=
2.5% is target, the proportioning of adjustment coke, fluorite and lime stone.Specifically, coke, fluorite, lime stone proportioning can be with
It is：32:4:1 or 32:5：2.
And CaF in fluorite2＞ 50% containing mass percent.
4th step, loads regular burden(ing) in regular burden(ing) section.
Regular burden(ing) includes：Sinter, pellet, fluorite.
Regular burden(ing) section improves the ratio of pellet, usual pellet ratio as far as possible based on well done material (sintering, pelletizing) blow-on
Example is more than 55%, and the ratio for increasing pellet is greatly improved into furnace charge Iron grade and scum ratio, and can be by with addition of a small amount of
Fluorite (fluorite with addition of ratio be 0.5t) adjustment slag fluidity.
Regular burden(ing) proportioning needs to meet the following conditions：Clinker dual alkalinity R2=1.1, CaF in slag2Between 2~6%, iron
[Si]=4% in water, slag ratio are less than 400kg/thm, and iron charge load level is maintained within 2.5.
In addition, net burnt (pure coke) can be also added in the regular burden(ing) section；, net coke (per) charge number by the way of progressively successively decreasing and
It is distributed into stove regular burden(ing) transpostion interval.
By the lower slag ratio control of regular burden(ing) less than 400kg/thm, blow-on can obtain more qualified iron, while subtract significantly
Lack the use of this kind of miscellaneous material of manganese ore, further reduce blow-on cost.Further, since the blow-on quantity of slag is few, then certain in coke ratio
On the premise of, the slag iron into cupola well can obtain the temperature of higher, to ensure that cupola well obtains sufficient heat.In addition, may be used also
Delay the time of first time iron, see slag after foreknowledge iron, ensure the reasonable flow of slag iron.
The requirement of general assembly pan feeding：Within the total coke ratio 3.2t/thm of blow-on, clinker dual alkalinity R2=0.9-1.0, CaF in slag2
Between 2~6%, [Si]=4% in molten iron, full clinker ratio is less than 800kg/thm.
Referring to Fig. 1, with 2500m3Exemplified by blast furnace, whole furnace burdening is divided into four sections first, is respectively (1) weedtree section：From
Cupola well ladle heel layer to air port center line loads hardwood；(2) net burnt section：In cupola well air port center line to load in the middle part of furnace bosh
Coke；(3) empty burnt section：It is empty burnt to charging at edge on furnace bosh up 5 meters in the middle part of furnace bosh, consisting of：Coke+fluorite+lime
Stone.(4) regular burden(ing) section：From furnace bosh along at 5 meters to loading regular burden(ing) at lower 2 meters of furnace throat stockline, consisting of：Coke+sintering
Ore deposit+pellet+fluorite.
Then, it is determined that ore deposit batch 36.8t, coke (per) charge 16t, the bulk density of various furnace charges, compression ratio 13%, pig iron component, element
In slag iron distribution coefficient, determine volume shared by each section；
Weedtree section：Load hardwood below the center line of air port and in ladle heel layer, it should select that 200 × 600mm's of φ is hard miscellaneous
Wood loads in stove from air port, loads height to air port center line.The dress of hardwood is calculated according to the volume of this section and compression ratio
Enter amount.
Net Jiao's section：Load the rational dry coke quenching of index.According to coke (per) charge 16t, compression ratio 13%, bulk density and this section of blast furnace
Volume, determines required net coke (per) charge number 27 batches.
Empty Jiao's section：To ensure clinker dual alkalinity R2=1.05, CaF in slag2Between 2~6%, [Si] in molten iron=
2.5% is target, and the proportioning of coke 16t, fluorite 0.3t and lime stone 1.2t are drawn after adjustment.
Regular burden(ing) section：Using sintering 30%, 70% stove of pelletizing as main blow-on material, the ratio of pellet is improved as far as possible, usually
Pellet ratio is more than 55%, can be by adjusting slag fluidity with addition of a small amount of fluorite.It is required that：Clinker dual alkalinity R2=1.1,
CaF in slag2Between 2~6%, [Si]=4% in molten iron, slag ratio is less than 400kg/thm, and iron charge load level maintains 2.5
Within.And certain net Jiao is added, and be distributed into stove with requiring additional net burnt and regular burden(ing) transpostion interval.Additional net burnt addition
Mode can be added by the way of progressively successively decreasing, such as 5 batches additional net burnt+5 batches of regular burden(ing)s, 4 batches of additional net burnt+5 batches of regular burden(ing)s, and 3
Criticize additional net burnt+5 batches of regular burden(ing)s, 2 batches of additional only burnt+5 batches of regular burden(ing)s, 1 batch of additional net burnt+5 batches of regular burden(ing).
The requirement of general assembly pan feeding：Within the total coke ratio 3.2t/thm of blow-on, clinker dual alkalinity R2=0.9-1.0, CaF in slag2
Between 2~6%, [Si]=4% in molten iron, full clinker ratio is less than 800kg/thm.
CaF in the fluorite2＞ 50% containing mass percent.
Above is the specific introduction of the embodiment of the present invention, below summarizes the present invention：
Wherein it is described preferably after four sections of furnace charges composition and structure：
The weedtree section is made of the hardwood of 200 × 600mm of φ, the hardwood of the size easy to manually from air port throw away into
In stove；The net burnt section is made of the rational dry coke quenching of loading index；The empty burnt section is made of coke, fluorite and lime stone,
And by controlling clinker dual alkalinity R2=1.05, CaF in slag2Between 2~6%, [Si]=2.5% comes for target in molten iron
Adjust the proportioning of coke, fluorite and lime stone.CaF in the fluorite2＞ 50% containing mass percent.The regular burden(ing) section by
Sintering, pellet composition, pellet ratio is more than 55%, and requires clinker dual alkalinity R2=1.1, CaF in slag22~6%
Between, [Si]=4% in molten iron, slag ratio is less than 400kg/thm, and iron charge load level is maintained within 2.5.
The spatial altitude of preferable four sections of furnace charges：
The weedtree section refers to load hardwood from ladle heel layer to cupola well air port center line；The net burnt section refers to from cupola well
Air port center line is with the loading coke in the middle part of furnace bosh；The empty burnt section refers in the middle part of furnace bosh to up 3 meters to 5 of edge on furnace bosh
Load at rice empty burnt；The regular burden(ing) section refers to from furnace bosh along up loading normally to 2 meters of places of furnace throat stockline at 3 meters to 5 meters
Expect, certain net Jiao is added in the loading procedure of its regular burden(ing), and require to add and be distributed into stove burnt and regular burden(ing) transpostion interval only
It is interior.
From the on the whole general assembly pan feeding requirement of full stove：Within the total coke ratio 3.2t/thm of blow-on, clinker dual alkalinity R2=
0.9-1.0, CaF in slag2Between 2~6%, [Si]=4% in molten iron, full clinker ratio is less than 800kg/thm.
By one or more embodiment of the present invention, the invention has the advantages that or advantage：
The invention discloses a kind of blast furnace blowing-in burdening method, the furnace burdening of the blast furnace is divided into four sections, is respectively weedtree
Section, net burnt section, empty burnt section, regular burden(ing) section；By loading hardwood in the weedtree section, the well done of sleeper is substituted using hardwood
Expect blow-on, clinker growing amount can be substantially reduced, improve the gas permeability of cohesive zone, especially when the 6~10 of blow-on initial stage is small, contracting
Short cohesive zone forms the time, accelerates blow-on process, stablizes the direct motion state of blast furnace.Load coke in the net burnt section, described
Empty Jiao's section loads empty Jiao, and meets empty burnt conditions of mixture ratios：Clinker dual alkalinity R2=1.05, CaF in slag2Between 2~6%, iron
[Si]=2.5% in water.Load regular burden(ing) in the regular burden(ing) section, regular burden(ing) proportioning is met condition：Clinker dual alkalinity R2
=1.1, CaF in slag2Between 2~6%, [Si]=4% in molten iron, slag ratio is less than 400kg/thm, and iron charge load level maintains
Within 2.5.
The lower slag ratio control of regular burden(ing) can obtained into more qualified iron less than 400kg/thm blow-ons, while subtracted significantly
Lack the use of this kind of miscellaneous material of manganese ore, further reduce blow-on cost.
Further, since the blow-on quantity of slag is few, then on the premise of coke ratio is certain, the slag iron into cupola well can obtain
The temperature of higher, to ensure that cupola well obtains sufficient heat.
Further, it can delay the time of first time iron, see slag after foreknowledge iron, ensure the reasonable flow of slag iron.
Although having been described for the preferred embodiment of the application, one of ordinary skilled in the art once knows substantially
Creative concept, then can make these embodiments other change and modification.So appended claims are intended to be construed to wrap
Include preferred embodiment and fall into all change and modification of the application scope.
Obviously, those skilled in the art can carry out the application essence of the various modification and variations without departing from the application
God and scope.In this way, if these modifications and variations of the application belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising including these modification and variations.
Claims (7)
- A kind of 1. blast furnace blowing-in burdening method, it is characterised in that the furnace burdening of the blast furnace is divided into four sections, be respectively weedtree section, Net Jiao's section, empty burnt section, regular burden(ing) section；Load hardwood in the weedtree section；Wherein, cupola well ladle heel layer to cupola well air port center line is the weedtree section；Load coke in the net burnt section；Wherein, cupola well air port center line with the middle part of the furnace bosh for the net burnt section；Load in the empty burnt section empty burnt；It is described empty burnt including coke, fluorite, lime stone；Preset in the middle part of the furnace bosh to shaft Position is the empty burnt section；In the empty burnt section, the empty burnt proportioning of charging meets that condition is：Clinker dual alkalinity R2= 1.05, CaF in slag2Between 2~6%, [Si]=2.5% in molten iron；The shaft predeterminated position is in is with edge on furnace bosh Benchmark, and along up at 3-5 rice on furnace bosh；Load regular burden(ing) in the regular burden(ing) section；Wherein, the regular burden(ing) includes：Coke, sinter, pellet, fluorite；It is described Shaft predeterminated position to furnace throat stockline predeterminated position is the regular burden(ing) section；The furnace throat stockline predeterminated position is under furnace throat stockline At 2 meters of face；In the regular burden(ing) section, regular burden(ing) proportioning meets condition：Clinker dual alkalinity R2=1.1, CaF in slag22~ Between 6%, [Si]=4% in molten iron, slag ratio is less than 400kg/thm, and iron charge load level is maintained within 2.5.
- 2. a kind of blast furnace blowing-in burdening method as claimed in claim 1, it is characterised in that the coke, the fluorite, described The proportioning of lime stone three is：32:4:1 or 32:5:2.
- 3. a kind of blast furnace blowing-in burdening method as claimed in claim 1, it is characterised in that described in the regular burden(ing) section The ratio of pellet is more than 55%.
- 4. a kind of blast furnace blowing-in burdening method as claimed in claim 1, it is characterised in that the specification of the hardwood is φ 200×600mm。
- 5. a kind of blast furnace blowing-in burdening method as claimed in claim 1, it is characterised in that the regular burden(ing) Duan Zhongke is added only Jiao, net coke (per) charge number by the way of progressively successively decreasing and regular burden(ing) transpostion interval be distributed into stove.
- A kind of 6. blast furnace blowing-in burdening method as claimed in claim 1, it is characterised in that CaF in the fluorite2Containing quality hundred Divide the ＞ 50% of ratio.
- A kind of 7. blast furnace blowing-in burdening method as claimed in claim 1, it is characterised in that general assembly pan feeding requirement：Blow-on is always burnt Within 3.2t/thm, clinker dual alkalinity R2=0.9-1.0, CaF2 is between 2~6% in slag, [Si]=4% in molten iron, Full clinker ratio is less than 800kg/thm.
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| CN106011339B (en) * | 2016-07-07 | 2018-12-14 | 首钢集团有限公司 | A kind of blast furnace blowing-in burdening method |
| CN108315514B (en) * | 2018-02-09 | 2019-12-31 | 武汉钢铁有限公司 | Blast furnace blow-in charging method |
| CN110669883B (en) * | 2018-08-22 | 2022-02-01 | 广东韶钢松山股份有限公司 | 1050m3Process for preparing furnace material of blast furnace |
| CN111593149A (en) * | 2019-02-20 | 2020-08-28 | 新疆八一钢铁股份有限公司 | Smooth blow-in method for large blast furnace for iron making |
| CN110835662B (en) * | 2019-11-28 | 2021-11-02 | 内蒙古科技大学 | Furnace stewing material charging method for rapidly recovering furnace condition of blast furnace |
| CN111041139A (en) * | 2019-12-17 | 2020-04-21 | 首钢集团有限公司 | Material distribution method for blast furnace blowing-in |
| CN111778371B (en) * | 2020-05-21 | 2021-09-17 | 南京钢铁股份有限公司 | Method for quickly spraying coal and enriching oxygen during blow-in of blast furnace |
| CN114959131B (en) * | 2022-04-25 | 2023-10-20 | 广东韶钢松山股份有限公司 | Filling process for sleeper in blast furnace opening |
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| CN101942534B (en) * | 2010-09-02 | 2012-01-18 | 武汉钢铁(集团)公司 | Proportioning method adopted during blow-in for large and medium maintenance of blast furnace |
| CN102399921A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Blast furnace blowing-in burdening method |
| CN103031394A (en) * | 2012-10-30 | 2013-04-10 | 鞍钢股份有限公司 | Proportioning method for lower part of blast furnace |
| CN104232821B (en) * | 2014-09-09 | 2016-04-13 | 武汉钢铁(集团)公司 | 3000m 3above large blast furnace blow-on dress distribution |
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