CN113136465A - Material distribution method for preventing middle coke from being distributed into center of blast furnace - Google Patents

Material distribution method for preventing middle coke from being distributed into center of blast furnace Download PDF

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Publication number
CN113136465A
CN113136465A CN202110401546.8A CN202110401546A CN113136465A CN 113136465 A CN113136465 A CN 113136465A CN 202110401546 A CN202110401546 A CN 202110401546A CN 113136465 A CN113136465 A CN 113136465A
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coke
big
blast furnace
batch
center
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Inventor
吴官印
姜彦冰
蒋益
龚继兵
何冲
李伟伟
邵思维
张智勇
孙岳琦
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/006—Automatically controlling the process
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/007—Conditions of the cokes or characterised by the cokes used
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2300/00—Process aspects
    • C21B2300/04—Modeling of the process, e.g. for control purposes; CII

Abstract

The invention relates to a material distribution method for preventing middle coke from being distributed in the center of a blast furnace, wherein large coke and middle coke are fed into the furnace in batches, the middle coke originally distributed in the center of the blast furnace is replaced by the large coke, which is called T coke, and the T coke is distributed in the center of the blast furnace by using a fixed-point material distribution system alone; the large coke is made of a material with coke added in the center; and (4) preparing the burden distribution by using the non-central coking material in batches after the middle coke originally distributed in the center of the blast furnace is deducted. The method thoroughly separates and distributes the middle coke blocks and the large coke blocks, replaces the middle coke blocks which should be distributed in the center originally by the large coke blocks, simultaneously keeps the total amount of the large coke blocks unchanged in the feeding period, and successfully avoids the problem that the quality of the furnace core coke is influenced by the distribution of the middle coke blocks in the center of the blast furnace under the condition of not reducing the coke load. The adverse effect of the lump coke on the production of the blast furnace in the use of a large amount is avoided, the activation of the hearth is facilitated, and the long-term stable and smooth operation of the blast furnace is ensured.

Description

Material distribution method for preventing middle coke from being distributed into center of blast furnace
Technical Field
The invention relates to the field of ferrous metallurgy, in particular to a material distribution method for preventing medium coke from being distributed into the center of a blast furnace.
Background
A blast furnace made of center coke feeding materials is adopted, whether middle coke blocks and large coke blocks are fed into the blast furnace in the same batch or in batches, the middle coke blocks can enter the center of the blast furnace during material distribution and then become a part of furnace core coke, in the field of the existing metallurgical coke, the granularity of the big coke blocks is generally 40-60mm, the granularity of the middle coke blocks is generally 20-40mm, and because the granularity of the middle coke blocks is small and has strong reaction capability, the granularity attenuation degree of the middle coke blocks entering the blast furnace is large, a large amount of middle coke blocks enter a furnace core coke pile, the granularity of the furnace core coke can be reduced, the air and liquid permeability of dead material columns is reduced, the activity of a furnace cylinder is reduced, and the stable and smooth operation of the blast furnace is influenced.
Patent CN201510350095.4 discloses a blast furnace coke distribution method, which divides blast furnace coke into a plurality of groups, wherein the blast furnace coke consists of large coke and middle coke; each group is composed of large coke blocks or a combination of 'middle coke block and large coke block', and the large coke blocks are arranged in the center of the blast furnace. The invention relates to a coke distributing method giving consideration to central and edge airflows, which creatively utilizes the difference of different parts of a blast furnace on coke particle level requirements, distributes a large amount of large coke blocks at the central part of the blast furnace to play a role in improving the central airflow, distributes a large amount of medium coke blocks at the edge of the blast furnace to play a role in improving the conditions of chemical reactions in the blast furnace, and distributes a small amount of large coke blocks at the edge of the blast furnace to play a role in improving the edge airflow at the upper part of the blast furnace and a role in improving the air permeability and the liquid permeability of a hearth of the blast furnace after the large coke blocks enter a hearth at the lower part of the blast furnace. However, the patent does not completely avoid the middle coke block from being distributed into the center of the blast furnace, and actually, the middle coke block and the large coke block still have the same batch and adopt the same system.
The blast furnace feeding is generally in a reciprocating cycle according to periods, the varieties and weights of ores and cokes in all periods and the distribution mode are completely consistent, and a period comprises a plurality of batches of cokes and ores, wherein the cokes and the ores are alternately fed into the furnace in batches.
Disclosure of Invention
The invention aims to provide a material distribution method for preventing medium coke from being distributed into the center of a blast furnace.
In order to achieve the purpose, the invention adopts the following technical scheme:
a material distribution method for preventing medium coke from being distributed into the center of a blast furnace comprises the following steps:
1) charging the large coke and the middle coke into the furnace in batches, replacing the middle coke originally distributed in the center of the blast furnace with the large coke, namely T coke, wherein the T coke is distributed in the center of the blast furnace by using a fixed point distribution system independently, and the batch weight of the T coke is PT；
The large coke is distributed by adopting a material with coke added at the center, and the batch weight of the large coke is PBig (a)；
The middle coke after deducting the middle coke originally distributed in the center of the blast furnace is distributed by using non-center coke-added materials in batches, and the batch weight of the middle coke is PIn；
2) Determining the total batch number S of ore coke feeding for removing T coke in a feeding periodGeneral assembly(ii) a Total batch number S of middle cokeIn(ii) a Bulk coke batch number SBig (a)；
Determining SGeneral assembly：SGeneral assembly＝2×(KBig (a)+KIn)÷KIn(ii) a The result is approximately an integer even number; kBig (a)The coke ratio of the large block is obtained; kInThe medium coke ratio;
② determining SIn：SInTake 1 or 2 or 3, and SInThe selection principle is that the middle block is coked with weight PInAnd bulk coke batch weight PBig (a)The difference is not more than 3t, and a logical calculation method is adopted, namely S is takenIn1, and calculates PInAnd PBig (a)If P isInAnd PBig (a)If the difference is less than 3t, S is takenInIf P is equal to 1InAnd PBig (a)If the difference is more than 3t, then S is taken againIn2; and calculate PInAnd PBig (a)And comparing PInAnd PBig (a)Two values in size, if PInAnd PBig (a)If the difference is more than 3t, then S is taken againInIs equal to 3, and calculates PInAnd PBig (a)In the field of blast furnace production, subject to practical constraints SInThe value can be generally taken to be 3 at most;
(iii) determination of SBig (a): removing the T coke batch, and feeding the blast furnace in the form of ore coke alternate feeding, thereby SGeneral assembly＝2×(SBig (a)+SIn) I.e. SBig (a)＝1/2SGeneral assembly-SIn；
3) Determining coke batch weight P in a mediumIn
PIn＝KIn×QBatch of×SGeneral assembly÷2÷SIn1000; unit: t; qBatch ofThe iron content of each batch of ore is as follows: percent;
4) determining bulk coke batch weight PBig (a)
PBig (a)＝(KBig (a)×QBatch of×SGeneral assembly÷2÷1000-PT) (ii) a Unit: t;
5) determining the weight P of the coke batchT
PT＝PIn×SInX a; unit: t;
a is the percentage of the central coke content in the large coke distribution system.
Compared with the prior art, the invention has the beneficial effects that:
the method completely separates and distributes the medium coke and the large coke, uses the non-central coke feeding material to distribute the medium coke batch, wherein the batch weight of the medium coke is the batch weight after deducting the medium coke amount originally distributed into the center, replaces the medium coke amount originally distributed into the center by the large coke, and independently uses a fixed-point distribution system to distribute into the center of the blast furnace, and simultaneously keeps the total amount of the large coke in the feeding period unchanged, thereby successfully avoiding the problem that the quality of the coke of the furnace core is influenced by the distribution of the medium coke into the center of the blast furnace under the condition of not reducing the coke load. The adverse effect of the lump coke on the production of the blast furnace in the use of a large amount is avoided, the activation of the hearth is facilitated, and the long-term stable and smooth operation of the blast furnace is ensured.
Detailed Description
The invention is further illustrated by the following examples:
the following examples describe the invention in detail. These examples are merely illustrative of the best embodiments of the present invention and do not limit the scope of the invention.
Example 1
Blast furnace bulk coke ratio KBig (a)310Kg/t, middle coke ratio KIn50Kg/t, the iron content of each batch of ore is QBatch of58.60t。
The material distributing method for preventing the medium coke from being distributed into the center of the blast furnace comprises the following steps:
1) charging the large coke and the middle coke into the furnace in batches, replacing the middle coke originally distributed in the center of the blast furnace with the large coke, namely T coke, distributing the T coke in the center of the blast furnace by using a fixed point distribution system alone,
2) determining the batch number and the batch weight of each coke batch in a feeding period (single period)
①SGeneral assembly＝2×(KBig (a)+KIn)÷KIn＝2×(310+50)÷50＝14；
Get SIn1, then SBig (a)＝14÷2-1＝6
②PIn＝KIn×QBatch of×SGeneral assembly÷2÷SIn1000 ÷ 50 × 58.60 × 14 ÷ 2 ÷ 1 ÷ 1000 ÷ 20.51 t/batch.
③PBig (a)＝(KBig (a)×QBatch of×SGeneral assembly÷2÷1000-PT)÷SBig (a)(310 × 58.60 × 14 ÷ 2 ÷ 1000-6.1) ÷ 6 ═ 20.18 t/batch.
④PInAnd PBig (a)The difference is less than 1t, so take SInThe condition can be met when the value is 1;
⑤PT＝Pin×SInX a, and if a is 30%, then PT20.51 × 1 × 30% ═ 6.1 t/batch.
The single-cycle material distribution sequence is shown in table 1; table 1:
single cycle 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Seed of material CT CIn OMine CBig (a) OMine CBig (a) OMine CBig (a) OMine CBig (a) OMine CBig (a) OMine CBig (a) OMine
The cloth system is shown in table 2;
table 2:
Figure BDA0003020514490000031
example 2
Blast furnace bulk coke ratio KBig (a)250Kg/t, middle coke ratio KIn100Kg/t, the iron content Q of each batch of oreBatch of58.60t。
The material distributing method for preventing the medium coke from being distributed into the center of the blast furnace comprises the following steps:
1) charging the large coke and the middle coke into the furnace in batches, replacing the middle coke originally distributed in the center of the blast furnace with the large coke, namely T coke, distributing the T coke in the center of the blast furnace by using a fixed point distribution system alone,
2) determining the batch number and the batch weight of each coke batch in a feeding period (single period)
Then SGeneral assembly＝2×(KBig (a)+KIn)÷KIn2 × (250+100) ÷ 100 ═ 6 (even);
get SIn1, then SBig (a)＝6÷2-1＝2。
②PIn＝KIn×QBatch of×SGeneral assembly÷2÷SIn÷1000＝100×58.60×6÷2 ÷ 1 ÷ 1000 ÷ 17.58 t/batch.
③PBig (a)＝(KBig (a)×QBatch of×SGeneral assembly÷2÷1000-PT)÷SBig (a)(250 × 58.60 × 6 ÷ 2 ÷ 1000-5.2) ÷ 2 ═ 19.38 t/batch.
④PInAnd PBig (a)The difference is less than 1t, so take SInThe condition can be met when the value is 1;
⑤PT＝Pin×SInX a, a is calculated to be 30%, then PT17.58 × 1 × 30% ═ 5.2 t/batch.
The single-cycle material distribution sequence is shown in table 3;
table 3:
single cycle 1 2 3 4 5 6 7
Seed of material CT CIn OMine CBig (a) OMine CBig (a) OMine
The cloth system is shown in table 4;
table 4:
Figure BDA0003020514490000041

Claims (1)

1. a material distribution method for preventing medium coke from being distributed into the center of a blast furnace is characterized by comprising the following steps:
1) charging the large coke and the middle coke into the furnace in batches, replacing the middle coke originally distributed in the center of the blast furnace with the large coke, namely T coke, wherein the T coke is distributed in the center of the blast furnace by using a fixed point distribution system independently, and the batch weight of the T coke is PT(ii) a The large coke is distributed by adopting a material with coke added at the center, and the batch weight of the large coke is PBig (a)(ii) a The middle coke after deducting the middle coke originally distributed in the center of the blast furnace is distributed by using non-center coke-added materials in batches, and the batch weight of the middle coke is PIn；
2) Determining the total batch number S of ore coke feeding for removing T coke in a feeding periodGeneral assembly(ii) a Total batch number S of middle cokeIn(ii) a Bulk coke batch number SBig (a)；
Determining SGeneral assembly：SGeneral assembly＝2×(KBig (a)+KIn)÷KIn(ii) a The result is approximately an integer even number; kBig (a)The coke ratio of the large block is obtained; kInThe medium coke ratio;
② determining SIn：SInTake 1 or 2 or 3, and SInThe selection principle is that the middle block is coked with weight PInAnd bulk coke batch weight PBig (a)The difference is not more than 3t, and a logical calculation method is adopted, namely S is takenIn1, and calculates PInAnd PBig (a)If P isInAnd PBig (a)If the difference is less than 3t, S is takenInIf P is equal to 1InAnd PBig (a)If the difference is more than 3t, then S is taken againIn2; and calculate PInAnd PBig (a)And comparing PInAnd PBig (a)Two values in size, if PInAnd PBig (a)If the difference is more than 3t, then S is taken againInIs equal to 3, and calculates PInAnd PBig (a)In the field of blast furnace production, subject to practical constraints SInThe value can be generally taken to be 3 at most;
(iii) determination of SBig (a): removing the T coke batch, and feeding the blast furnace in the form of ore coke alternate feeding, thereby SGeneral assembly＝2×(SBig (a)+SIn) I.e. SBig (a)＝1/2SGeneral assembly-SIn；
3) Determining coke batch weight P in a mediumIn
PIn＝KIn×QBatch of×SGeneral assembly÷2÷SIn1000; unit: t; qBatch ofThe iron content of each batch of ore is as follows: percent;
4) determining bulk coke batch weight PBig (a)
PBig (a)＝(KBig (a)×QBatch of×SGeneral assembly÷2÷1000-PT) (ii) a Unit: t;
5) determining the weight P of the coke batchT
PT＝PIn×SInX a; unit: t;
a is the percentage of the central coke content in the large coke distribution system.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0873908A (en) * 1994-09-09 1996-03-19 Nkk Corp Apparatus for controlling grain size of charging material in bell-less blast furnace
CN104975119A (en) * 2015-06-24 2015-10-14 山西太钢不锈钢股份有限公司 Coke distributing method of blast furnace
CN108611455A (en) * 2016-12-13 2018-10-02 鞍钢股份有限公司 A kind of blast furnace uses the distributing method of small nut coke
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
CN111139325A (en) * 2020-01-21 2020-05-12 鞍钢股份有限公司 Non-bell material distribution center coking compensation method
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0873908A (en) * 1994-09-09 1996-03-19 Nkk Corp Apparatus for controlling grain size of charging material in bell-less blast furnace
CN104975119A (en) * 2015-06-24 2015-10-14 山西太钢不锈钢股份有限公司 Coke distributing method of blast furnace
CN108611455A (en) * 2016-12-13 2018-10-02 鞍钢股份有限公司 A kind of blast furnace uses the distributing method of small nut coke
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
CN111139325A (en) * 2020-01-21 2020-05-12 鞍钢股份有限公司 Non-bell material distribution center coking compensation method
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
赵国磊 等: "高炉中心加焦炉料分布机理及布料方式探讨", 《钢铁》 *

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Application publication date: 20210720