CN114480751A - Novel material distribution method for grading charging of blast furnace coke - Google Patents

Abstract

The invention provides a novel material distribution method for grading blast furnace coke to enter a furnace, 1) two middle hoppers are arranged on a main belt layer: a first intermediate hopper and a second intermediate hopper; 2) putting common coke into the first middle hopper, and putting high-quality coke into the second middle hopper; 3) the cloth matrix of the material clock-free device is set to be C ↓ C ↓ O ↓; the first C ↓ is a common focal matrix, the second C ↓ is a high-quality focal matrix, and O ↓ is an ore matrix. The material distribution method is provided with the two middle hoppers, metallurgical coke with different qualities is respectively loaded in the two middle hoppers, and the original material loading system is adjusted from C ↓ O ↓ to C ↓ C ↓ O ↓, so that the problems that the coke with two different grades is distributed at the position required by blast furnace smelting are solved, the cost is increased due to the improvement of the coke quality or the position required by the blast furnace smelting cannot be distributed by using part of high-quality coke are avoided, and the purposes of smelting requirement and cost reduction are achieved.

Description

Novel material distribution method for grading charging of blast furnace coke

Technical Field

The invention relates to the technical field of blast furnace coke distribution, in particular to a novel distribution method for graded charging of blast furnace coke.

Background

Most of domestic blast furnaces adopt a central coke charging distribution mode, and a batch of coke is distributed through adjusting the inclination angle of a chute and the number of turns of distribution by a bell-less distribution device, so that the distribution task is completed, the quality of the coke is stepped, the air permeability of the blast furnace burden and the size of a central dead stock column are determined, and the smooth operation of the furnace conditions and the improvement of indexes are influenced. In order to avoid the adverse effect of overlarge dead charge columns on smelting, the phenomenon is usually avoided by improving the quality of metallurgical coke, but the quality of the coke is improved to cause the great rise of the coking cost, and in another method, two kinds of cokes with different grades are distributed with common coke at the edge and high-quality coke at the center by utilizing the function of a bell-less device, but the method is characterized in that before the distribution, the central coke is difficult to be all high-quality coke due to the multiple mixing of an intermediate hopper, a material receiving tank, a material feeding tank and a material discharging tank, and the expected effect cannot be achieved.

The material distribution technology fully exerts the configuration of the blast furnace equipment (two middle hoppers are configured), metallurgical cokes with different qualities are respectively loaded in the two middle hoppers, and the metallurgical cokes with higher quality are distributed in the central part of the blast furnace by adjusting the computer program, the material distribution sequence and the material distribution matrix, so that the adverse effect on smelting caused by the increase of dead material columns is avoided, the phenomena that the coking cost is greatly increased and the high-quality cokes cannot be distributed in the central part of a charge level are avoided, the furnace condition is improved, and the effect of improving the indexes of the blast furnace is achieved.

Disclosure of Invention

In order to overcome the defects in the background technology, the invention provides a novel material distribution method for graded charging of blast furnace coke, which is characterized in that two intermediate hoppers are configured, metallurgical coke with different qualities is respectively charged into the two intermediate hoppers, and the metallurgical coke with higher quality is distributed into the central part of the blast furnace through a material distribution matrix, so that the adverse influence on smelting caused by the increase of dead material columns is avoided, the phenomena that the coking cost is greatly increased and the high-quality coke cannot be distributed in the central part of a charge level are avoided, the furnace condition is improved, and the effect of improving the blast furnace index is achieved.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel material distribution method for graded charging of blast furnace coke uses a bell-less device for charging, and is characterized by comprising the following steps:

1) two middle hoppers are arranged on the main belt layer: a first intermediate hopper and a second intermediate hopper;

2) putting common coke into the first middle hopper, and putting high-quality coke into the second middle hopper;

3) the cloth matrix of the material clock-free device is set to be C ↓ C ↓ O ↓; the first C ↓ is a common focal matrix, the second C ↓ is a high-quality focal matrix, and O ↓ is an ore matrix.

Further, the total cloth matrix is n columns, the first C ↓ matrix is set to be n-1 columns, and the second C ↓ matrix is set to be 1 column.

Further, the coke amount in the second intermediate hopper is set to 15-20% of the total coke amount.

Further, the coke amount in the first intermediate hopper is set to 80-85% of the total coke amount.

Compared with the prior art, the invention has the beneficial effects that:

the material distribution method is provided with the two middle hoppers, metallurgical coke with different qualities is respectively loaded in the two middle hoppers, and the original material loading system is adjusted from C ↓ O ↓ to C ↓ C ↓ O ↓, so that the problems that the coke with two different grades is distributed at the position required by blast furnace smelting are solved, the cost is increased due to the improvement of the coke quality or the position required by the blast furnace smelting cannot be distributed by using part of high-quality coke are avoided, and the purposes of smelting requirement and cost reduction are achieved.

Drawings

FIG. 1 is a raw coke matrix chart;

FIG. 2 is a diagram of the shape of the coke feed face;

FIG. 3 is a first focus distribution matrix of an embodiment of the present invention;

FIG. 4 is a diagram of a second focus matrix of an embodiment of the present invention;

FIG. 5 is a schematic representation of the coke dough shape of an embodiment of the present invention.

Detailed Description

The following detailed description of the present invention will be made with reference to the accompanying drawings.

A novel material distribution method for grading blast furnace coke to enter a furnace uses a bell-less device for charging, and is characterized by comprising the following steps:

1) two middle hoppers are arranged on the main belt layer: a first intermediate hopper and a second intermediate hopper;

2) putting common coke into the first middle hopper, and putting high-quality coke into the second middle hopper;

3) the cloth matrix of the material clock-free device is set to be C ↓ C ↓ O ↓; the first C ↓ is a common focal matrix, the second C ↓ is a high-quality focal matrix, and O ↓ is an ore matrix.

And if the total cloth matrix is n columns, the first C ↓ matrix is set to be n-1 columns, and the second C ↓ matrix is set to be 1 column.

The coke amount in the second middle hopper is set to be 15-20% of the total coke amount.

The coke amount in the first middle hopper is set to be 80-85% of the total coke amount.

The specific embodiment is as follows:

firstly, adjusting an original loading system from C ↓toC ↓toO ↓byadjusting a computer program, then preparing cokes (central coke quantity and platform coke quantity) with two different qualities in two middle hoppers through calculation, and distributing the cokes and ores in required positions in the furnace through a loading belt, a receiving hopper, a loading hopper, a discharging hopper, a chute and other equipment according to the requirements of the distribution.

(1) High-quality coke (the proportion of the central high-quality coke is generally 15-20%), platform coke (the proportion of the platform common coke is generally 80-85%) and mixed ore are respectively put in the two coke intermediate hoppers.

(2) During production, according to the requirement of a charging matrix of a blast furnace, the platform coke matrix of the blast furnace is executed firstly, platform coke is distributed by using one middle hopper, then the center coke matrix of the blast furnace is executed, and center coke is distributed by using the other middle hopper, so that high-quality coke is added in the center of a charge level to meet the requirement of smelting.

The cloth matrix is detailed below:

(1) the coke batch was 19 t/batch and the ore batch was 100 t/batch.

(2) The cloth matrix is composed of: c ↓: O ↓

The method specifically comprises the following steps:

the coke put in the two coke intermediate hoppers is 19X 15.2% (the central coke proportion) is 2.9t, the coke put in the platform 19-2.9 is 16.1t, and the ore amount put in the two ore intermediate hoppers is 100 t.

Fig. 1 to fig. 5 are comparison diagrams before and after improvement of a cloth manner, fig. 1 and fig. 2 are C ↓ O ↓ matrix cloth with a single middle bucket, and fig. 3 to fig. 5 are C ↓ O ↓ matrix cloth with double middle buckets, which can be seen: after the improvement, the quality coke is disposed entirely in the center area.

1. After improvement, two different grades of cokes are charged, and the coking cost is reduced.

2. The material distribution technology is applied to a No. 2 blast furnace in New North-China business in No. 5 month in 2020, the furnace condition is stable and smooth, the furnace hearth works normally, the index is obviously improved, the furnace condition is smooth after the material distribution technology is applied, the yield is improved, the coke ratio is reduced, and the index is shown in the following table:

the invention respectively puts two cokes with different qualities into the coke middle hopper, and distributes the high-quality cokes into the center by adjusting the computer program and the distribution matrix. Because the two kinds of coke are put into the furnace in a grading way, the cost for producing high-quality coke is reduced, thereby reducing the iron-making cost. The high-quality coke is distributed in the center of the blast furnace, so that the influence of overlarge dead material columns on the blast furnace smelting is avoided, the stable and smooth operation of the blast furnace is realized, and the index is improved.

The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.

Claims (4)

1. A novel material distribution method for grading blast furnace coke to enter a furnace uses a bell-less device for charging, and is characterized by comprising the following steps:

1) two middle hoppers are arranged on the main belt layer: a first intermediate hopper and a second intermediate hopper;

2) putting common coke into the first middle hopper, and putting high-quality coke into the second middle hopper;

3) the cloth matrix of the material clock-free device is set to be C ↓ C ↓ O ↓; the first C ↓ is a common focal matrix, the second C ↓ is a high-quality focal matrix, and O ↓ is an ore matrix.

2. The novel distribution method for blast furnace coke graded charging according to claim 1, characterized in that the distribution total matrix is n columns, then the first C ↓ matrix is set to n-1 columns, and the second C ↓ matrix is set to 1 column.

3. The novel method for distributing the graded blast furnace coke into the furnace as claimed in claim 1, wherein the amount of the coke in the second intermediate hopper is set to 15-20% of the total amount of the coke.

4. The novel method for distributing the graded blast furnace coke into the furnace as claimed in claim 1, wherein the amount of the coke in the first intermediate hopper is set to 80-85% of the total amount of the coke.

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