CN105112590B - Funnel-shaped burden surface distribution method for blast furnace - Google Patents
Funnel-shaped burden surface distribution method for blast furnace Download PDFInfo
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Abstract
The invention relates to the technical field of blast furnace smelting, in particular to a funnel-shaped burden surface distribution method for a blast furnace, used for forming a funnel-shaped burden surface. In the method, coke is added into the blast furnace in batches, each batch of coke is distributed in a special manner, distributing is circulated many times, the funnel-shaped burden surface can be formed smoothly, low effect is caused to a soft melting zone, and stability of blast furnace condition is facilitated; blast furnace stability is improved, product yield is increased, product stability is improved, and product quality is improved; fuel ratio of the blast furnace is decreased, and production cost is lowered; pig iron yield of the blast furnace is increased, fixed cost is lowered, and finally production cost is lowered.
Description
Technical field
The present invention relates to technical field of blast furnace process, specifically, is exactly related to a kind of blast furnace funnel type charge level cloth side
Method, for forming funnel type charge level.
Background technology
Blast furnace is a cylindrical shape shaft furnace, and scenery resource quality is in blast furnace circumferencial direction.From blast furnace roof toward height in ironmaking processes
Stove adds after furnace charge, and furnace charge can cause blast furnace circumferencial direction near the fringe region of furnace wall than central area blanking during declining
Hurry up, its charge level gradually tends to flat during causing furnace charge to decline in blast furnace, and when reaching cohesive zone horizontality is substantially at.
Thus charge level in State of Blast Furnace is caused to there are two kinds of shapes：" planar-shaped ", " steamed bun shape ".
The ore deposit of " planar-shaped " charge level, focus layer will be inclined gradually downward near furnace wall direction, " the ore soft heat of run-off the straight
Layer " easily slides to furnace wall, causes furnace wall to bond, and bulk, furnace temperature under air port occurs and the phenomenon such as fluctuates widely.
, at the cloth initial stage, its ore deposit, focus layer are near furnace wall side just in downward-sloping state, the low center in edge for " steamed bun shape " charge level
It is high.When ore deposit, focus layer reach cohesive zone, its tilt condition is more serious, and cohesive zone " burnt window " quantity is greatly reduced, " ore soft heat
During layer " the close inverted " v " cohesive zone lower angular of inclined degree, its area coverage increase, blast furnace permeability is greatly lowered.
" infundibulate " charge level fundamentally overcome bulk, furnace temperature under " planar-shaped " charge level air port fluctuate widely, " steamed bun
The area coverage increase of shape " charge level cohesive zone, the shortcoming that blast furnace permeability is greatly lowered, the impact to cohesive zone is less, profit
It is stable in conditions of blast furnace, therefore, in blast furnace material distribution, as far as possible cloth is carried out using the distributing mode of funnel type.
Traditional distributing method, using top distributing chute spiral rotating cloth, burden distribution matrix selects 4～7 gears, often
The different angle of fascinating of individual gear correspondence, in the angle to blast furnace inside with circular manner uniform distribution, by coke quantity average mark
It is fitted on the circumference of each gear, this distributing mode is typically only capable to obtain " planar-shaped ", " steamed bun shape " charge level, therefore, it is badly in need of
A kind of mode, i.e., using rational distributing mode, smoothly and easily obtain funnel type charge level.
The implication of relational language in the present invention：
Fascinating, angle --- when blast furnace carries out cloth, material is threaded into inside blast furnace from distributor chute, on distributor chute
Surface is material slipsurface, this surface and the angle of fascinating that the angle of vertical direction is chute.As in Fig. 1, a is angle of fascinating.
Burden distribution matrix：It is made up of the fascinate cloth number of turns of angle and each gear of gear, such as 39/3 means, in the gear,
The angle of fascinating of chute is 39 °, and cloth three is enclosed；C（39/3、37/2、34/2、31/2、16/3）Implication is, respectively 39 °, 37 °,
34 °, 31 °, 16 ° of the angle gear cloth 3,2,2,2,3 that fascinates enclose, and so on.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, reality need is adapted to, design a kind of blast furnace funnel moulding mixture
Face distributing method.
In order to realize the purpose of the present invention, the technical solution used in the present invention is：
A kind of blast furnace funnel type charge level distributing method, comprises the steps：
The first step, adds first coke that quality is M, described first coke to select N number of shelves from outside to inside to blast furnace
Position carries out cloth successively, and each gear adopts the cloth quality of circumferencial direction uniform distribution, outmost turns gear and innermost circle gear
It is M1, the cloth quality of each gear is M in the middle of remaining2, M1=1.5 M2,N≥4；
Second step, according to MZ=（1——1.6）The quality of M adds second batch coke, and the coke charge charcoal selects described first
The gear of more than three of outermost carries out cloth in step, and the cloth quality of outside gear is more than or equal to adjacent inboard gear cloth
Quality, after the complete coke charge charcoal of cloth a collection of ore is added；
3rd step, according to adding the order of a collection of coke, a collection of ore to feed successively, be per the addition of coke charge charcoal：MX=
M-X（15%～25%）MZ, X=1,2,3 ..., cloth, outmost turns gear are carried out to each gear in the first step from outside to inside
With 1.5 times that the cloth quality of innermost circle gear is intervening gears cloth quality, so repeatedly 4 --- 7 times, until MX=0；
Cloth is carried out according still further to first coke cloth pattern of the first step, ore is added after cloth, according to coke --- the cloth of ore
Material order is circulated successively；
4th step, the second step and the 3rd step, --- repetitive cycling once, altogether circulated 6 in 10 hours --- 10 times per 6.
The second step and the 3rd step, for every eight hours circulation is implemented 1 time, Jing 80 --- funnel moulding mixture is defined after 96 hours
Face.
During cloth, the control of blast furnace pressure reduction is not more than 150kPa.
After blast fumance 16 days, again according to the first step --- the 4th step defines again the production of funnel type charge level, repeatedly
Circulation.
In the first step, select five gears to carry out cloth to 10 tons of coke, fascinated angle and the cloth number of turns by chute
The burden distribution matrix of composition is C（39/3、37/2、34/2、31/2、16/3）, wherein the corresponding coke quality by each gear within outer
It is respectively 25.00%, 16.67%, 16.67%, 16.67%, the 25.00% of this batch of coke quality；In the second step, according to 12
The quality of ton carries out cloth to second batch coke, and the burden distribution matrix that fascinated by chute angle and the cloth number of turns are constituted is C（39/6、37/
4、34/2、31/2）, wherein correspond to 4 gears coke quality ecto-entad be respectively this batch of coke quality 46.15%,
30.77%、15.38%、7.69%。
In the first step, select six gears to carry out cloth to 10 tons of coke, fascinated angle and the cloth number of turns by chute
The burden distribution matrix of composition is C（39/3、37/2、34/2、31/2、29/2、16/3）, wherein the corresponding coke by each gear within outer
Quality is respectively 21.43%, 14.29%, 14.29%, 14.29%, 14.29%, the 21.43% of this batch of coke quality；Described second
In step, cloth is carried out to second batch coke according to 15 tons of quality, the burden distribution matrix that fascinated by chute angle and the cloth number of turns are constituted
For C（39/6、37/4、34/2、31/1）, wherein the coke quality ecto-entad for corresponding to 4 gears is respectively this batch of coke quality
42.86%, 28.57%, 14.29%, 14.29%.
The present invention is primarily directed to distributing method traditional during blast furnace ironmaking and causes charge level in State of Blast Furnace to have two kinds
Shape：" planar-shaped ", " steamed bun shape ", exists to easily cause and causes furnace wall to bond, and bulk, furnace temperature significantly ripple under air port occurs
It is dynamic, the shortcomings of blast furnace permeability is greatly lowered.
Beneficial effect：
1. the impact of pair cohesive zone is less, stable beneficial to conditions of blast furnace；
2. blast furnace stability increases, and increased product yield, improves the stability and product quality of product；
3. blast furnace fuel reduces production cost than declining；
4. blase furnace cast iron yield increases, and constant expense is reduced, and final production manufacturing cost is reduced.
Description of the drawings
Fig. 1 fascinates the structural representation at angle for chute.
In figure, 1 is material flow gate, and 2 are rolling valve, and 3 is chute, and a fascinates angle for chute.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is further described：
The invention discloses a kind of blast furnace funnel type charge level distributing method, now by Fig. 1 and two embodiment come specifically
The concrete steps of bright technical solution of the present invention:
Embodiment one：
The first step, adds first coke that quality is 10 tons, first coke to select 5 gears from outside to inside to blast furnace
Cloth successively is carried out, the angle of fascinating of this five gears is followed successively by：39th, 37,34,31,16, the cloth number of turns at each angle of fascinating is successively
For 3,2,2,2,3, each gear adopts circumferencial direction uniform distribution, therefore, the cloth that fascinated by chute angle and the cloth number of turns are constituted
Material matrix is C（39/3、37/2、34/2、31/2、16/3）, wherein the corresponding coke quality by each gear within outer is respectively this
Criticize 25.00%, 16.67%, 16.67%, 16.67%, the 25.00% of coke quality；
In second step, cloth is carried out to second batch coke according to 12 tons of quality, select four of outermost in the first step
Gear, the burden distribution matrix that fascinated by chute angle and the cloth number of turns are constituted is C（39/6、37/4、34/2、31/1）, wherein corresponding 4
The coke quality ecto-entad of gear is respectively 46.15%, 30.77%, 15.38%, the 7.69% of this batch of coke quality；Complete this batch of cloth
A collection of ore is added after coke；
3rd step, first with first 10 tons of coke, deducts 20% of coke quality in second step, i.e. 10-1*20%*12=
7.6, cloth is carried out to 7.6 tons of coke, the burden distribution matrix of the coke charge charcoal is identical with the burden distribution matrix of first coke in the first step,
As C（39/3、37/2、34/2、31/2、16/3）, wherein the coke quality ecto-entad for corresponding to each gear is respectively the coke charge
25.00%, 16.67%, 16.67%, 16.67%, the 25.00% of carbonaceous amount；After complete this coke charge charcoal of cloth, then a collection of ore of cloth, Zhi Houzai
The a collection of coke of cloth, the quality of the coke charge charcoal is 10--2*20%*12=5.2 tons, the in the burden distribution matrix of the coke charge charcoal and the first step
The burden distribution matrix of a collection of coke is identical, is C（39/3、37/2、34/2、31/2、16/3）, wherein corresponding to the coke quality of each gear
Ecto-entad is respectively 25.00%, 16.67%, 16.67%, 16.67%, the 25.00% of this batch of coke quality；So circulation, until
Coke quality is reduced to be finished, and recovers normal cloth pattern, i.e., according to the distributing mode cloth coke of the first step, then cloth ore,
Move in circles successively；
4th step, the second step and the 3rd step, for every eight hours once, circulation 10 times altogether, Jing is formed repetitive cycling for 80 hours
Funnel type charge level.
During funnel type charge level is formed, due to air-flow redistribution, to guarantee that the working of a furnace is stablized, in cloth process
In, the control of blast furnace pressure reduction is not more than 155kPa.
After blast fumance 10-20 days, again according to the first step --- the 4th step defines again the production of funnel type charge level, instead
Multiple circulation.
Embodiment two：
The first step, adds first coke that quality is 10 tons, first coke to select 6 gears from outside to inside to blast furnace
Cloth successively is carried out, the angle of fascinating of this 6 gears is followed successively by：39th, 37,34,31,29,16, the cloth number of turns at each angle of fascinating according to
Secondary is 3,2,2,2,2,3, and each gear adopts circumferencial direction uniform distribution, therefore, fascinated angle by chute and the cloth number of turns is constituted
Burden distribution matrix be C（39/3、37/2、34/2、31/2、29/2、16/3）, wherein the corresponding coke quality by each gear within outer
It is respectively 21.43%, 14.29%, 14.29%, 14.29%, 14.29%, the 21.43% of this batch of coke quality；
In second step, cloth is carried out to second batch coke according to 15 tons of quality, select four of outermost in the first step
Gear, the burden distribution matrix that fascinated by chute angle and the cloth number of turns are constituted is C（39/6、37/4、34/2、31/2）, wherein corresponding 4
The coke quality ecto-entad of gear is respectively 42.86%, 28.57%, 14.29%, the 14.29% of this batch of coke quality；Cloth is complete should
A collection of ore is added after coke charge charcoal；
3rd step, first with first 10 tons of coke, deducts 16.67% of coke quality in second step, i.e. 10-1*
7.5 tons of coke are carried out cloth by 16.67%*15=7.5, the cloth of first coke in the burden distribution matrix and the first step of the coke charge charcoal
Material matrix is identical, as C（39/3、37/2、34/2、31/2、29/2、16/3））, wherein corresponding to the coke quality of each gear by outer
Inwardly it is respectively 21.43%, 14.29%, 14.29%, 14.29%, 14.29%, the 21.43% of this batch of coke quality；Complete this coke charge of cloth
After charcoal, then a collection of ore of cloth, a collection of coke of cloth again afterwards, the quality of the coke charge charcoal is 10--2*16.67%*15=5 tons, the coke charge
The burden distribution matrix of charcoal is identical with the burden distribution matrix of first coke in the first step, is C（39/3、37/2、34/2、31/2、29/2、
16/3）, wherein correspond to each gear coke quality ecto-entad be respectively this batch of coke quality 21.43%, 14.29%,
14.29%、14.29%、14.29%、21.43%；So circulation, until coke quality is reduced and finished, recovers normal cloth pattern,
I.e. according to the distributing mode cloth coke of the first step, then cloth ore, moves in circles successively；
4th step, the second step and the 3rd step, for every eight hours successively, circulation 12 times altogether, Jing is formed repetitive cycling for 96 hours
Funnel type charge level.
During funnel type charge level is formed, due to air-flow redistribution, to guarantee that the working of a furnace is stablized, in cloth process
In, the control of blast furnace pressure reduction is not more than 152kPa.
After blast fumance 18 days, again according to the first step --- the 4th step defines again the production of funnel type charge level, repeatedly
Circulation.
Claims (6)
1. a kind of blast furnace funnel type charge level distributing method, it is characterised in that comprise the steps：
The first step, adds first coke that quality is M, described first coke to select N number of gear to enter from outside to inside to blast furnace
Capable cloth successively, each gear is using the cloth quality of circumferencial direction uniform distribution, outmost turns gear and innermost circle gear
M1, the cloth quality of each gear is M in the middle of remaining2, M1=1.5 M2,N≥4；
Second step, according to MZ=（1——1.6）The quality of M adds second batch coke, and the coke charge charcoal is selected in the first step most
The gear of more than three of periphery carries out cloth, and the cloth quality of outside gear is more than or equal to adjacent inboard gear cloth quality,
A collection of ore is added after the complete coke charge charcoal of cloth；
3rd step, according to adding the order of a collection of coke, a collection of ore to feed successively, be per the addition of coke charge charcoal：MX=M-X
（15%～25%）MZ, X=1,2,3 ..., carry out cloth to each gear in the first step from outside to inside, outmost turns gear and
The cloth quality of innermost circle gear is 1.5 times of intervening gears cloth quality, and so repeatedly 4 --- 7 times, until MX=0；Again
First coke cloth pattern according to the first step carries out cloth, and ore is added after cloth, according to coke --- the cloth of ore
Order is circulated successively；
4th step, the second step and the 3rd step, --- repetitive cycling once, altogether circulated 6 in 10 hours --- 10 times per 6.
2. blast furnace funnel type charge level distributing method according to claim 1, it is characterised in that：The second step and the 3rd
Step, for every eight hours circulation is implemented 1 time, Jing 80 --- funnel type charge level is defined after 96 hours.
3. the blast furnace funnel type charge level distributing method according to claim 1 or claim 2, it is characterised in that：In cloth
During, the control of blast furnace pressure reduction is not more than 150kPa.
4. blast furnace funnel type charge level distributing method according to claim 3, it is characterised in that：After blast fumance 16 days, weight
Newly according to the first step --- the 4th step defines again the production of funnel type charge level, iterative cycles.
5. blast furnace funnel type charge level distributing method according to claim 1, it is characterised in that：In the first step, choosing
Select five gears carries out cloth to 10 tons of coke, and the burden distribution matrix that fascinated by chute angle and the cloth number of turns are constituted is C（39/3、37/
2、34/2、31/2、16/3）, wherein the corresponding coke quality by each gear within outer be respectively this batch of coke quality 25.00%,
16.67%、16.67%、16.67%、25.00%；In the second step, cloth is carried out to second batch coke according to 12 tons of quality
Material, the burden distribution matrix that fascinated by chute angle and the cloth number of turns are constituted is C（39/6、37/4、34/2、31/1）, wherein corresponding to 4 shelves
The coke quality ecto-entad of position is respectively 46.15%, 30.77%, 15.38%, the 7.69% of this batch of coke quality.
6. blast furnace funnel type charge level distributing method according to claim 1, it is characterised in that：In the first step, choosing
Select six gears carries out cloth to 10 tons of coke, and the burden distribution matrix that fascinated by chute angle and the cloth number of turns are constituted is C（39/3、37/
2、34/2、31/2、29/2、16/3）, wherein the corresponding coke quality by each gear within outer is respectively this batch of coke quality
21.43%、14.29%、14.29%、14.29%、14.29%、21.43%；In the second step, according to 15 tons of quality to second
Coke charge charcoal carries out cloth, and the burden distribution matrix that fascinated by chute angle and the cloth number of turns are constituted is C（39/6、37/4、34/2、31/2）,
Wherein correspond to 4 gears coke quality ecto-entad be respectively this batch of coke quality 42.86%, 28.57%, 14.29%,
14.29%。
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| CN111235337A (en) * | 2018-11-29 | 2020-06-05 | 新疆八一钢铁股份有限公司 | Material distribution method for improving condition of Ou metallurgical furnace |
| CN110684874A (en) * | 2019-09-25 | 2020-01-14 | 包头钢铁（集团）有限责任公司 | Blast furnace material distribution method |
| CN111088410B (en) * | 2020-01-17 | 2021-02-05 | 北京科技大学 | Blast furnace material distribution system with material guiding function and method |
| CN112906222B (en) * | 2021-02-20 | 2023-07-25 | 武汉钢铁有限公司 | Cloth fluctuation detection method and device |
| CN115232899B (en) * | 2022-07-29 | 2024-01-19 | 马鞍山钢铁股份有限公司 | Method for precisely controlling distribution amount of specific area in multi-ring distribution process of blast furnace |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845528A (en) * | 2010-06-02 | 2010-09-29 | 首钢总公司 | Multi-ring matrix burden distribution process for bell-less top of blast furnace |
| CN102816879A (en) * | 2012-08-03 | 2012-12-12 | 燕山大学 | Burden distribution method for bucket string-type bell-free blast furnace |
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| JP5412947B2 (en) * | 2008-12-29 | 2014-02-12 | 新日鐵住金株式会社 | Apparatus and method for measuring profile of blast furnace interior |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845528A (en) * | 2010-06-02 | 2010-09-29 | 首钢总公司 | Multi-ring matrix burden distribution process for bell-less top of blast furnace |
| CN102816879A (en) * | 2012-08-03 | 2012-12-12 | 燕山大学 | Burden distribution method for bucket string-type bell-free blast furnace |
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