CN107881272A - A kind of method in blast furnace internal classification sub-prime cloth - Google Patents
A kind of method in blast furnace internal classification sub-prime cloth Download PDFInfo
- Publication number
- CN107881272A CN107881272A CN201711031106.8A CN201711031106A CN107881272A CN 107881272 A CN107881272 A CN 107881272A CN 201711031106 A CN201711031106 A CN 201711031106A CN 107881272 A CN107881272 A CN 107881272A
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- prime
- crude fuel
- cloth
- baffle plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/18—Bell-and-hopper arrangements
- C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
Modern blast furnace constantly maximizes, and causes center often occur to blow impermeable (dead permeability of stock column is poor), and gas utilization rate is low, and fuel ratio remains high.Its basic reason is the particle segregation of simultaneously tank cloth system, a large amount of small grain size coke and small grain size ore is entered blast furnace center or by paracentral annulus, has a strong impact on the gas permeability of blast furnace and the reduction of ore, blast furnace ironmaking is produced totally unfavorable.Therefore, for existing cloth system, the invention provides a kind of method of blast furnace classification sub-prime cloth, the crude fuel of different brackets different quality can be allowed to be encased in the radially different position of blast furnace, so as to solve the above problems according to the needs of smelting.Not only technical process is simply controllable, is classified sub-prime excellent effect, and the investment transformation to existing device is small, crude fuel classification sub-prime is entered stove and continues efficiently to carry out.
Description
Technical field
The invention belongs to metallurgical technology research and improvement areas, and in particular to a kind of in the side of blast furnace internal classification sub-prime cloth
Method.
Background technology
For energy-conserving and environment-protective, increase economic efficiency, modern blast furnace constantly maximizes, even up to 6000m3Rank.But greatly
The cupola well and bosh diameter of type blast furnace are very big, cause center often occur to blow impermeable (dead permeability of stock column is poor), gas utilization rate
Low, fuel ratio remains high.Its basic reason is the particle segregation of simultaneously tank cloth system, a large amount of small grain size coke is entered height
Stove central area, and gradually as furnace charge lowers into dead stock column, along with the progress of smelting process, this portion central region
Coke size becomes smaller, so that the gas permeability of dead stock column further deteriorates.For ore, the problem of same be present,
Due to the presence of segregation phenomena, the ore of small grain size is concentrated in some or certain several annulus, can even be collapsed sometimes with coke
Collapse into blast furnace subcenter even central area, cause regional area fluidization occur, air turbulence, and the air-flow of some regions
It is very weak even without air-flow, this is very unfavorable to ore reduction.
Therefore,, can basis the invention provides a kind of method of blast furnace classification sub-prime cloth for existing cloth system
The needs of smelting, the crude fuel of different brackets different quality is allowed to be encased in the radially different position of blast furnace, so as to solve above-mentioned ask
Topic.
The content of the invention
It is an object of the invention to provide a kind of method of blast furnace classification sub-prime cloth, original can be controlled since system under groove
The flow direction and feeding order of fuel, ensure that high-quality crude fuel and common crude fuel separate on charging belt, ensure crude fuel point
Level sub-prime enters stove, and technical process is simply controllable, is classified sub-prime excellent effect, and the investment transformation to existing device is small, makes crude fuel
Classification sub-prime enters that stove is sustainable efficiently to be carried out.
To realize the purpose of foregoing invention, the technical solution adopted by the present invention is：
A kind of method in blast furnace internal classification sub-prime cloth, this method comprise the following steps：
(1) crude fuel is sieved or working process, obtains high-quality crude fuel and common crude fuel, and deposit in respectively
In different hoppers；
(2) when giving groove lower belt blowing, high-quality crude fuel and common crude fuel are separated on belt with segmented version, and
More than 5 meters of adjacent material head material tail interval；
(3) toward during batch can charging, the baffle plate in batch can is rotated first, to accept corresponding material；
(4) to the end of batch can feeds, related valve acts in place, carries out batch can discharge operation, discharges a kind of rank first
Crude fuel, end to be discharged, reversely rotate baffle plate, to discharge the crude fuel of another rank.
Further, a kind of method in blast furnace internal classification sub-prime cloth, distributor chute, the action sequence of baffle plate and cloth square
Battle array ensures certain correlation, realizes chain and linkage, i.e.,：Usage amount, the cloth of high-quality crude fuel are determined according to burden distribution matrix
Time and gear, and then the Startup time that baffle plate reversely rotates is determined, before baffle plate reversely rotates in place, distributor chute fascinates
To above-mentioned gear.
Compared with prior art, the beneficial effects of the present invention are：(1) technical process is controllable, to existing feeding system
Do not influenceed with cloth system stability；(2) it is good to enter stove effect for the classification sub-prime of crude fuel, operates flexible and convenient；(3) to existing
The transformation amount of relevant device is small, and the transformation cycle is short, and investment is small；(4) crude fuel classification sub-prime enters the sustainable efficiently progress of stove, makes height
Stove ironmaking is stronger to the adaptability of raw material and fuel quality fluctuation, reduces damping down, reduces fuel consumption, reduces ironmaking cost.
Brief description of the drawings
Fig. 1 is process layout under groove of the invention, by hopper 1-1,1-2,1-3,1-4, groove lower belt 1-5 and feeding
Main belt 1-6 compositions；
Fig. 2 is the batch can charging cloth figure of the present invention, is made up of batch can 2-1 and baffle system 2-2；
Fig. 3 be the present invention blast furnace in material distribution map, wherein upper blast furnace 3-1, ordinary coke layer 3-2, ore layer 3-
3, high grade coke 3-4.
Embodiment
Below in conjunction with accompanying drawing, by specific embodiment (so that coke sub-prime enters stove as an example), the present invention will be further described.Tool
The embodiment of body：
Coke batch weight is 30 tons, and burden distribution matrix is as follows：
C 1 2 3 4 5 6 7 12
4 3 3 2 2 2 2 2
Wherein the 1st~7 grade is total up to 18 circle ordinary cokes (27 tons), and the 12nd grade is 2 circle high grade cokes (3 tons).
A. STRENGTH ON COKE is sieved or working process, obtains ordinary coke and high grade coke, and deposit in different hoppers
It is interior；
B. the hopper of storage high grade coke is opened, batch can is sent into by belt 1-5 and belt 1-6.Rotate the gear in batch can
Plate system 2-2 makes high grade coke fall in the spatial dimension surrounded on baffle plate and batch can inclined-plane to coating medium pot sidewall；
C. according to smelting requirements, treat that high grade coke reaches setting value (3 tons) from hopper discharge, close high grade coke hopper valve
Door.Wait 3~5 seconds, open the hopper valve of ordinary coke, be fed toward belt.By material of the ordinary coke (27 tons) in batch can
Stream TRAJECTORY CONTROL is in the spatial dimension that baffle plate and batch can are surrounded by blast furnace center line side.By such mode, realize
High grade coke and ordinary coke separate in batch can；
D. complete two kinds of coke to load after the operation of batch can, into blast furnace material distribution link.Batch can is opened, performs cloth square
Battle array (1~7 grade), first load ordinary coke toward blast furnace.After ordinary coke drains out of batch can, distributor chute starts to incline toward the 12nd grade
It is dynamic, while the baffle plate in batch can is reversely rotated, high grade coke is discharged batch can, cloth to blast furnace centre is final to obtain accompanying drawing 3
Shown coke distribution.
Enter stove process for the sub-prime of ore, it is similar to above-mentioned steps A~D, set with reference to the burden distribution matrix of reality, you can
Realize that the classification sub-prime of ore enters stove.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into method, all fall within the protection domain of application claims.
Claims (2)
- A kind of 1. method in blast furnace internal classification sub-prime cloth, it is characterised in that this method comprises the following steps：(1) crude fuel is sieved or working process, obtains high-quality crude fuel and common crude fuel, and deposit in difference respectively Hopper in；(2) when giving groove lower belt blowing, high-quality crude fuel and common crude fuel are separated on belt with segmented version, and it is adjacent More than 5 meters of material head material tail interval；(3) toward during batch can charging, the baffle plate in batch can is rotated first, to accept corresponding material；(4) to the end of batch can feeds, related valve acts in place, carries out batch can discharge operation, discharges a kind of original of rank first Fuel, end to be discharged, baffle plate is reversely rotated, to discharge the crude fuel of another rank.
- A kind of 2. method in blast furnace internal classification sub-prime cloth according to claim 1, it is characterised in that distributor chute, The action sequence of baffle plate ensures certain correlation with burden distribution matrix, realizes chain and linkage, i.e.,：Determined according to burden distribution matrix excellent Usage amount, cloth time and the gear of matter crude fuel, and then the Startup time that baffle plate reversely rotates is determined, reversely rotated in baffle plate Before in place, distributor chute fascinates to above-mentioned gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711031106.8A CN107881272A (en) | 2017-10-25 | 2017-10-25 | A kind of method in blast furnace internal classification sub-prime cloth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711031106.8A CN107881272A (en) | 2017-10-25 | 2017-10-25 | A kind of method in blast furnace internal classification sub-prime cloth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107881272A true CN107881272A (en) | 2018-04-06 |
Family
ID=61782756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711031106.8A Pending CN107881272A (en) | 2017-10-25 | 2017-10-25 | A kind of method in blast furnace internal classification sub-prime cloth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107881272A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109593902A (en) * | 2018-12-03 | 2019-04-09 | 江苏省沙钢钢铁研究院有限公司 | A kind of big canister mixing cloth system of blast furnace roof and method |
| CN109628675A (en) * | 2018-12-03 | 2019-04-16 | 江苏省沙钢钢铁研究院有限公司 | A kind of blast furnace roof string and tank cloth system and method |
| CN113930559A (en) * | 2021-10-15 | 2022-01-14 | 本溪北营钢铁（集团）股份有限公司 | Novel material distribution method for grading charging of blast furnace coke |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000178624A (en) * | 1998-12-15 | 2000-06-27 | Kawasaki Steel Corp | Furnace top bunker of blast furnace and using method thereof |
| CN104313215A (en) * | 2014-11-19 | 2015-01-28 | 中冶南方工程技术有限公司 | Blast furnace sinter graded feeding technology |
| CN105296696A (en) * | 2015-11-26 | 2016-02-03 | 中冶赛迪工程技术股份有限公司 | Loading segregation-prevention system |
-
2017
- 2017-10-25 CN CN201711031106.8A patent/CN107881272A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000178624A (en) * | 1998-12-15 | 2000-06-27 | Kawasaki Steel Corp | Furnace top bunker of blast furnace and using method thereof |
| CN104313215A (en) * | 2014-11-19 | 2015-01-28 | 中冶南方工程技术有限公司 | Blast furnace sinter graded feeding technology |
| CN105296696A (en) * | 2015-11-26 | 2016-02-03 | 中冶赛迪工程技术股份有限公司 | Loading segregation-prevention system |
Non-Patent Citations (1)
| Title |
|---|
| 赵宏博等: "高炉原燃料分级布料过程及时序", 《北京科技大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109593902A (en) * | 2018-12-03 | 2019-04-09 | 江苏省沙钢钢铁研究院有限公司 | A kind of big canister mixing cloth system of blast furnace roof and method |
| CN109628675A (en) * | 2018-12-03 | 2019-04-16 | 江苏省沙钢钢铁研究院有限公司 | A kind of blast furnace roof string and tank cloth system and method |
| CN113930559A (en) * | 2021-10-15 | 2022-01-14 | 本溪北营钢铁（集团）股份有限公司 | Novel material distribution method for grading charging of blast furnace coke |
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Application publication date: 20180406 |
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