CN104975119A - Coke distributing method of blast furnace - Google Patents
Coke distributing method of blast furnace Download PDFInfo
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- CN104975119A CN104975119A CN201510350095.4A CN201510350095A CN104975119A CN 104975119 A CN104975119 A CN 104975119A CN 201510350095 A CN201510350095 A CN 201510350095A CN 104975119 A CN104975119 A CN 104975119A
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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 Large Scale BF will be far longer than small furnace to the requirement of fuel mass, so, a large amount of large lump cokes is preferentially protected for Large Scale BF, and like this, how limited large lump coke ensures that the stable of upper blast furnace air-flow and the active of bottom cupola well are a difficult problem of pendulum in face of 1800m3 blast furnace.If do not have good upper air, do not have active cupola well, all economic and technical norms of blast furnace are not just known where to begin.
Traditional cloth Jiao method has two kinds, first method be by large lump coke cloth all in a collection of coke all cloth in the centre of blast furnace, lump coke in other position cloth; Second method be according to coke ratio use be entirely by the gross large lump coke or be entirely by the gross the method for middle lump coke (such as, according to the ratio of the large lump coke of lump coke+40% in 1800 blast furnaces 60%, coke can be a circulation according to 5 batches, wherein 3 batches is middle lump coke entirely, two batches is that the method for large lump coke carries out cloth entirely), but these two kinds of methods are all not too reasonable for blast-furnace smelting.First method only considered the importance of central gas stream, but have ignored edge airflow.Second method be but improved edge airflow but ignore central gas stream and when after the middle lump coke at edge arrives cupola well in this part lump coke can become less, the activity of blast furnace hearth will be had a strong impact on like this.
Summary of the invention
In order to overcome above-mentioned deficiency, the present invention aims to provide a kind of blast furnace cloth Jiao method, is a kind of cloth Jiao method taking into account center and peripheral air-flow.
The present invention is achieved by the following technical solutions:
The invention provides a kind of blast furnace cloth Jiao method, blast-furnace coke is divided into some groups, blast-furnace coke is made up of large lump coke and middle lump coke, the usage ratio of large lump coke and middle lump coke is protected for determining according to coke, and each group is made up of the combination of large lump coke or " middle lump coke+large lump coke " respectively.
The granularity of described large lump coke is 40 ~ 60mm; The granularity of described middle lump coke is 25 ~ 40mm.
Described large lump coke and the ratio of middle lump coke are 40%:60%.
As a kind of preferred version, blast furnace cloth Jiao method, is divided into 4 groups by blast-furnace coke, the 1st group be large lump coke, 2nd ~ 4 groups be the combination of " middle lump coke+large lump coke ", and carry out cloth according to burden distribution matrix.
Further, above-mentioned blast furnace cloth Jiao method comprises the following steps:
(1) amount of coke is split in proportion, discharge the combination of 1 group of large lump coke and 3 groups " middle lump coke+large lump cokes ";
(2) the above-mentioned coke sequenced is entered furnace top material tank for blast furnace;
(3) fuel in batch can is entered blast furnace according to given angle and the corresponding number of turns discharge of given angle, in utilization, large lump coke is split by lump coke, forms stable furnace roof charge level; Described given angle is the cloth ore deposit angle of furnace roof batch can distributor chute, and the corresponding number of turns of described given angle is the number of turns rotating cloth coke in the cloth ore deposit angle of correspondence.
Further, the cloth ore deposit angle of described furnace roof batch can distributor chute is 13 ° ~ 45.5 °, and often under the angle of group cloth ore deposit, the corresponding arrangement number of turns is 2 ~ 4 circles.
Should first ensure that blast furnace edge and central distribution were all large lump cokes by " 3+1 " Bu Jiaofa: 1 crowd " large lump coke ", 3 batches " middle lump cokes+large lump cokes " according to discharge order, blast furnace marginal distribution be middle lump coke, central distribution be large lump coke.The result of a collection of like this " large lump coke " and 3 batches of " middle lump coke+large lump coke " common clothes is lump cokes in there is a small amount of large lump coke the edge of blast-furnace coke batch of material section and is a large amount of, and center is all large lump coke.The benefit of such cloth is: the middle lump coke at a. edge carries out chemical reaction lower being easy to after cupola well, reduces the infringement to large lump coke, thus plays the effect protecting large lump coke; B. blast furnace edge is also distributed with a small amount of large lump coke, and these large lump cokes can play the effect keeping certain edge airflow at upper blast furnace, improves that cupola well is breathed freely, the effect of liquid permeability down to playing during cupola well; C. the large lump coke at center plays the effect of dredging central gas stream.
Of the present invention
beneficial effect:
1. solve the stable smooth operation of conditions of blast furnace in high-quality metallurgical coke resource shortage situation, make limited large lump coke obtain maximum utilization.
2. lump coke in a large amount of at blast furnace edge cloth, improve the reaction conditions of blast furnace on the one hand, also save large lump coke on the one hand, thus decrease coking cost, also alleviate the pressure (the industrial gaseous waste meeting severe contamination air that coking produces) of environmental protection to a certain extent.
Embodiment
Further illustrate the present invention below by embodiment, but be not limited to following examples.
Embodiment 1:
For Taiyuan Iron and Steel Co. 1800m3 blast furnace, the inventive method is described.The iron-smelting fuel ratio that Taiyuan Iron and Steel Co. 1800m3 blast furnace often uses is " in 60% the large lump coke of lump coke+40% ", and the quality size of a collection of coke that 3# blast furnace is commonly used is 8t.
1. according to method of the present invention, the method for coke according to 1 batch " large lump coke " and 3 batches " middle lump coke+large lump cokes " is calculated, then the calculation result of four batches one circulation is, 1 crowd of 8t all uses large lump coke, all the other 3 coke charge charcoals are proportionally calculated as " in 6.4t the large lump coke of block+1.6t " (like this with four batches for one-period carries out the calculating of cloth, the usage ratio of middle lump coke and large lump coke remains " in 60% the large lump coke of lump coke+40% ").
2. 1 batch of large lump coke of 8t is discharged, and the coke of 3 batches " in 6.4t the large lump cokes of block+1.6t ".
3. the above-mentioned fuel sequenced is entered furnace top material tank for blast furnace.(discharge material due to discharge system to discharge in a certain order, so raw material enters furnace roof batch can also to carry out according to this order.）
4. the fuel in batch can is discharged according to given angle and the number of turns and enter blast furnace.The burden distribution matrix that Taiyuan Iron and Steel Co. 1800m3 blast furnace material distribution uses is 3(45.5 °) 2(42 °) 2(38 °) 2(35.5 °) 4(13 °), wherein, 3(45.5 °) refer to that cloth swivel chute rotates cloth 3 and encloses on 45.5 °; 2(42 °) refer to that cloth swivel chute rotates cloth 2 and encloses on 42 °; 2(38 °) refer to that cloth swivel chute rotates cloth 2 and encloses on 38 °; 2(35.5 °) refer to that cloth swivel chute rotates cloth 2 and encloses on 35.5 °; 4(13 °) refer to that cloth swivel chute rotates cloth 4 and encloses on 13 °.
The difference that the present embodiment creatively utilizes blast furnace different sites STRENGTH ON COKE grade to require, by a large amount of large lump coke cloth in the centre of blast furnace, plays the effect improving central gas stream.In addition again by lump coke in a large amount of and a small amount of large lump coke cloth at the edge of blast furnace, the benefit of such cloth is: the middle lump coke at a. edge carries out chemical reaction lower being easy to after cupola well, reduce the infringement to large lump coke, thus play the effect protecting large lump coke; B. blast furnace edge is also distributed with a small amount of large lump coke, and these large lump cokes can play the effect keeping certain edge airflow at upper blast furnace, improves that cupola well is breathed freely, the effect of liquid permeability down to playing during cupola well.
Claims (6)
1. a blast furnace cloth Jiao method, it is characterized in that: blast-furnace coke is divided into some groups, blast-furnace coke is made up of large lump coke and middle lump coke, the usage ratio of large lump coke and middle lump coke is protected for determining according to coke, and each group is made up of the combination of large lump coke or " middle lump coke+large lump coke " respectively.
2. blast furnace cloth Jiao method according to claim 1, is characterized in that: the granularity of described large lump coke is 40 ~ 60mm; The granularity of described middle lump coke is 25 ~ 40mm.
3. blast furnace cloth Jiao method according to claim 1, is characterized in that: described large lump coke and the ratio of middle lump coke are 40%:60%.
4. blast furnace cloth Jiao method according to claim 1, is characterized in that: blast-furnace coke is divided into 4 groups, the 1st group be large lump coke, 2nd ~ 4 groups be the combination of large lump coke+middle lump coke; And carry out cloth according to burden distribution matrix.
5. blast furnace cloth Jiao method according to claim 4, is characterized in that: comprise the following steps:
(1) amount of coke is split in proportion, discharge the combination of 1 group of large lump coke and 3 groups " middle lump coke+large lump cokes ";
(2) the above-mentioned coke sequenced is entered furnace top material tank for blast furnace;
(3) fuel in batch can is entered blast furnace according to given angle and the corresponding number of turns discharge of given angle, in utilization, large lump coke is split by lump coke, forms stable furnace roof charge level; Described given angle is the cloth ore deposit angle of furnace roof batch can distributor chute, and the corresponding number of turns of described given angle is the number of turns rotating cloth coke in the cloth ore deposit angle of correspondence.
6. blast furnace cloth Jiao method according to claim 5, is characterized in that: the cloth ore deposit angle of described furnace roof batch can distributor chute is 13 ° ~ 45.5 °, and often under the angle of group cloth ore deposit, the corresponding arrangement number of turns is 2 ~ 4 circles.
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Cited By (6)
| 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 |
| CN109706277A (en) * | 2019-03-01 | 2019-05-03 | 武汉钢铁有限公司 | Application method of the coke of different initial reaction temperatures in blast furnace |
| CN112481432A (en) * | 2020-11-15 | 2021-03-12 | 山西太钢不锈钢股份有限公司 | Method for discharging lump coke in blast furnace |
| CN112609029A (en) * | 2020-11-09 | 2021-04-06 | 鞍钢股份有限公司 | Method for smelting medium coke in high-proportion use of large bell-less 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 |
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Cited By (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 |
| CN109706277A (en) * | 2019-03-01 | 2019-05-03 | 武汉钢铁有限公司 | Application method of the coke of different initial reaction temperatures in blast furnace |
| CN112609029A (en) * | 2020-11-09 | 2021-04-06 | 鞍钢股份有限公司 | Method for smelting medium coke in high-proportion use of large bell-less blast furnace |
| CN112481432A (en) * | 2020-11-15 | 2021-03-12 | 山西太钢不锈钢股份有限公司 | Method for discharging lump coke in 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 |
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| CN104975119B (en) | 2017-04-26 |
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