CN104975119B - Coke distributing method of blast furnace - Google Patents
Coke distributing method of blast furnace Download PDFInfo
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- CN104975119B CN104975119B CN201510350095.4A CN201510350095A CN104975119B CN 104975119 B CN104975119 B CN 104975119B CN 201510350095 A CN201510350095 A CN 201510350095A CN 104975119 B CN104975119 B CN 104975119B
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Abstract
The invention discloses a coke distributing method of a blast furnace. Blast furnace coke is divided into a plurality of groups, and is composed of large coke blocks and medium coke blocks. Each group of coke is composed of the large coke blocks or combination of the medium coke blocks and the large coke blocks, and the large coke blocks are distributed in the center of the blast furnace. Center airflow and edge airflow are considered in the coke distributing method. A large number of large coke blocks are distributed in the center of the blast furnace creatively through the difference of the requirements of different positions of the blast furnace for the particle size of the coke, and the function of improving the center airflow is achieved. In addition, a large number of medium coke blocks are distributed on the edge of the blast furnace, and the function of improving chemical reaction conditions in the blast furnace is achieved. In addition, a small number of large coke blocks are distributed on the edge of the blast furnace, and the function of improving the edge airflow can be achieved on the upper portion of the blast furnace. When the large coke blocks on the edge of the blast furnace enter a furnace cylinder on the lower portion of the blast furnace, the function of improving the ventilation and liquid permeability of the furnace cylinder of the blast furnace is achieved.
Description
Technical field
The present invention relates to a kind of blast furnace cloth Jiao method.
Background technology
Because requirement of the big blast furnace to fuel mass will be far longer than small furnace, so, substantial amounts of big lump coke is preferentially protected
Use for big blast furnace, so, how limited big lump coke ensures that the active of the stable and bottom cupola well of upper blast furnace air-flow is pendulum
A difficult problem in face of 1800m blast furnaces.If without good upper air, without active cupola well, all Jing of blast furnace
Ji technical specification is not just known where to begin.
Traditional cloth Jiao's method has two kinds, and first method is in height by all of big lump coke cloth all cloth in a collection of coke
The centre of stove, lump coke in other position cloth；Second method be according to coke ratio using be entirely by the gross big lump coke or
It is entirely by the gross the method for middle lump coke（Such as, according to the ratio of the big lump coke of lump coke+40% in 1800 blast furnaces 60%, coke can be according to 5
Criticize and circulated for one, wherein 3 batches is entirely middle lump coke, two batches are entirely that the method for big lump coke carries out cloth）But, both approaches
It is all less reasonable for blast furnace process.First method only considered the importance of central gas stream, but have ignored edge gas
Stream.Second method be but improve edge airflow but ignore central gas stream and when edge middle lump coke reach cupola well after this
Lump coke can become less in part, can thus have a strong impact on the activity of blast furnace crucibe.
The content of the invention
In order to overcome above-mentioned deficiency, the present invention is intended to provide a kind of blast furnace cloth Jiao's method, is that one kind takes into account center and peripheral
Cloth Jiao's method of air-flow.
The present invention is achieved by the following technical solutions：
The invention provides a kind of blast furnace cloth Jiao method, by blast-furnace coke some groups are divided into, blast-furnace coke is by big lump coke
Protected for determining according to coke with the use ratio of middle lump coke composition, big lump coke and middle lump coke, each group respectively by big lump coke
Or the combination composition of " middle lump coke+big lump coke ".
The granularity of described big lump coke is 40 ~ 60mm；The granularity of described middle lump coke is 25 ~ 40mm.
Described big lump coke and the ratio of middle lump coke is 40%:60%.
Used as a kind of preferred version, blast-furnace coke is divided into 4 groups by blast furnace cloth Jiao's method, the 1st group be big lump coke, the 2nd ~ 4
Group is the combination of " middle lump coke+big lump coke ", and carries out cloth according to burden distribution matrix.
Further, above-mentioned blast furnace cloth Jiao method is comprised the following steps：
（1）The amount of coke is split in proportion, 1 group of big lump coke and 3 groups " middle lump coke+big lump coke " is discharged
Combination；
（2）The above-mentioned coke for sequencing is entered into furnace top material tank for blast furnace；
（3）Fuel in batch can is discharged into into blast furnace according to the given angle number of turns corresponding with given angle, in utilization
Lump coke is split big lump coke, forms stable furnace roof charge level；The given angle is furnace roof batch can distributor chute
Cloth ore deposit angle, the given angle correspondence number of turns is the number of turns that cloth coke is rotated in corresponding cloth ore deposit angle.
Further, the cloth ore deposit angle of the furnace roof batch can distributor chute is 13 ° ~ 45.5 °, right under every group of cloth ore deposit angle
The arrangement number of turns answered is 2 ~ 4 circles.
Should " 3+1 " Bu Jiaofa：1 batch " big lump coke " ensure that first blast furnace edge and central distribution are all big lump cokes, 3 batches
" middle lump coke+big lump coke ", according to discharge order, blast furnace marginal distribution is middle lump coke, and central distribution is big lump coke.This
The result of sample a collection of " big lump coke " and 3 batches of " middle lump coke+big lump coke " common clothes is that have in the edge of blast-furnace coke batch of material section
Big lump coke on a small quantity and substantial amounts of middle lump coke, and center is entirely big lump coke.The benefit of so cloth is：A. the middle lump coke at edge
It is easy to carry out chemical reaction to after cupola well lower, reduces the infringement to big lump coke, so as to plays a part of the big lump coke of protection；b.
Blast furnace edge is also distributed with a small amount of big lump coke, and these big lump cokes can be played in upper blast furnace and keep certain edge airflow
Effect, down to playing a part of to improve during cupola well, cupola well is ventilative, liquid permeability；C. the big lump coke at center is played and dredges central gas
The effect of stream.
Beneficial effects of the present invention：
1. the stable smooth operation of conditions of blast furnace in the case of high-quality metallurgical coke resource shortage is solved so that limited big lump coke
Maximum utilization is obtained.
2. the substantial amounts of middle lump coke in blast furnace edge cloth, on the one hand improves the reaction condition of blast furnace, on the one hand also saves
About big lump coke, so as to reduce coking cost, also alleviates to a certain extent the pressure of environmental protection（The industry that coking is produced
Waste gas can severe contamination air）.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following examples.
Embodiment 1：
The inventive method is illustrated by taking Taiyuan Iron and Steel Co. 1800m blast furnaces as an example.The commonly used iron-smelting fuel of Taiyuan Iron and Steel Co. 1800m blast furnaces
Ratio is " the big lump coke of lump coke+40% in 60% ", and the quality size of the conventional a collection of coke of 3# blast furnaces is 8t.
1. coke is entered according to the method for 1 batch " big lump coke " and 3 batches " middle lump cokes+big lump coke " according to the method for the present invention
Row is calculated, then the result of calculation of four batches of circulations is that all using big lump coke, remaining 3 coke charge charcoal is proportionally calculated 1 crowd of 8t
For " the big lump cokes of block+1.6t in 6.4t "（Such making with four batches of calculating that cloth is carried out as a cycle, middle lump coke and big lump coke
Remained " the big lump coke of lump coke+40% in 60% " with ratio）.
2. the big lump cokes of 1 crowd of 8t of discharge, and the coke of 3 batches " the big lump cokes of block+1.6t in 6.4t ".
3. the above-mentioned fuel for sequencing is entered into furnace top material tank for blast furnace.（It is according to certain suitable to discharge material due to discharge system
What sequence was discharged, so, raw material is also sequentially to carry out according to this into furnace roof batch can.）
4. the fuel in batch can is discharged into into blast furnace according to given angle and the number of turns.Taiyuan Iron and Steel Co. 1800m blast furnace material distributions make
Burden distribution matrix is 3（45.5°）2（42°）2（38°）2（35.5°）4（13°）, wherein, 3（45.5°）Refer to that cloth rotation is slipped
Groove rotates cloth 3 on 45.5 ° and encloses； 2（42°）Refer to that cloth swivel chute rotates cloth 2 on 42 ° and encloses；2（38°）Refer to cloth
Material swivel chute rotates cloth 2 on 38 ° and encloses；2（35.5°）Refer to that cloth swivel chute rotates cloth 2 on 35.5 ° and encloses；4
（13°）Refer to that cloth swivel chute rotates cloth 4 on 13 ° and encloses.
The difference that the present embodiment is creatively required using blast furnace different parts STRENGTH ON COKE grade, by substantial amounts of big lump coke
Cloth plays a part of to improve central gas stream in the centre of blast furnace.In addition again by substantial amounts of middle lump coke and a small amount of big
Lump coke cloth is in the edge of blast furnace, the benefit of such cloth：A. the middle lump coke at edge is easy to carry out chemistry lower to after cupola well
Reaction, reduces the infringement to big lump coke, so as to play a part of the big lump coke of protection；B. blast furnace edge is also distributed with a small amount of
Big lump coke, these big lump cokes can play a part of to keep certain edge airflow in upper blast furnace, can rise down to during cupola well
To improving, cupola well is ventilative, liquid permeability effect.
Claims (4)
1. a kind of blast furnace cloth Jiao method, it is characterised in that：Blast-furnace coke is divided into into 4 groups, blast-furnace coke is by big lump coke and middle piece
Coke is constituted, and the use ratio of big lump coke and middle lump coke is protected for determining according to coke, the 1st group be big lump coke, the 2nd ~ 4 group be big
The combination of lump coke+middle lump coke；And carry out cloth according to burden distribution matrix；
The granularity of described big lump coke is 40 ~ 60mm；The granularity of described middle lump coke is 25 ~ 40mm.
2. blast furnace cloth according to claim 1 Jiao method, it is characterised in that：Described big lump coke and the ratio of middle lump coke
Example is 40%：60%.
3. blast furnace cloth according to claim 1 Jiao method, it is characterised in that：Comprise the following steps：
（1）The amount of coke is split in proportion, the group of 1 group of big lump coke and 3 groups " middle lump cokes+big lump coke " is discharged
Close；
（2）The above-mentioned coke for sequencing is entered into furnace top material tank for blast furnace；
（3）Fuel in batch can is discharged into into blast furnace according to the given angle number of turns corresponding with given angle, lump coke in utilization
Charcoal is split big lump coke, forms stable furnace roof charge level；The given angle is the cloth of furnace roof batch can distributor chute
Ore deposit angle, the given angle correspondence number of turns is the number of turns that cloth coke is rotated in corresponding cloth ore deposit angle.
4. blast furnace cloth according to claim 3 Jiao method, it is characterised in that：The Bu Kuang angles of the furnace roof batch can distributor chute
Spend for 13 ° ~ 45.5 °, the corresponding arrangement number of turns is 2 ~ 4 circles under every group of cloth ore deposit angle.
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| CN201510350095.4A CN104975119B (en) | 2015-06-24 | 2015-06-24 | Coke distributing method of blast furnace |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487022A (en) * | 2018-12-21 | 2019-03-19 | 鞍钢集团朝阳钢铁有限公司 | A kind of method for operating blast furnace |
| CN109706277B (en) * | 2019-03-01 | 2020-09-08 | 武汉钢铁有限公司 | Method for using coke with different initial reaction temperatures in blast furnace |
| CN112609029B (en) * | 2020-11-09 | 2022-07-19 | 鞍钢股份有限公司 | Method for smelting medium coke in high proportion in large bell-less blast furnace |
| CN112481432B (en) * | 2020-11-15 | 2022-04-08 | 山西太钢不锈钢股份有限公司 | Method for discharging lump coke in blast furnace |
| CN113136465A (en) * | 2021-04-14 | 2021-07-20 | 鞍钢股份有限公司 | Material distribution method for preventing middle coke from being distributed into center of blast furnace |
| 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 |
| CN116064981B (en) * | 2023-02-17 | 2024-10-15 | 武汉钢铁有限公司 | Material distribution method for converting blast furnace from central coke adding to non-central coke adding |
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| 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 |
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| 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 |
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