阅读说明：本技术 一种快速消除高炉管道行程的方法 (Method for quickly eliminating blast furnace pipeline stroke ) 是由 王玉莲 高良豪 卢保军 栾兆亮 胡广峰 薛燕 彭宏运 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种快速消除高炉管道行程的方法,根据高炉压量关系和各层炉体静压点状态,判断高炉管道行程状态和管道行程的位置；以1～2KPa/min的速度降低高炉炉顶压力；提高高炉实际风速；实际风速提高过程中会引起高炉崩料；如果提高风速过程中高炉未崩料,维持实际风速260m/s,持续等待直至崩料；高炉崩料后,管道行程状态会立即消除；管道行程消除后逐步提高炉顶压力；逐步提高炉顶压力,降低高炉实际风速至正常水平；崩料深度小于2.5m,不需要加入附加焦炭,否则,视炉温基础附加2～5t附加焦炭；恢复高炉所有操作参数；本发明通过准确的参数调整,快速有效的消除高炉管道行程,实现高炉标准化操作。(The invention discloses a method for quickly eliminating the pipeline stroke of a blast furnace, which judges the pipeline stroke state of the blast furnace and the position of the pipeline stroke according to the pressure relation of the blast furnace and the static pressure point state of each layer of furnace body; reducing the top pressure of the blast furnace at a speed of 1-2 KPa/min; improving the actual wind speed of the blast furnace; the blast furnace is broken in the process of increasing the actual wind speed; if the blast furnace is not broken in the process of increasing the wind speed, maintaining the actual wind speed at 260m/s, and continuously waiting until the material is broken; after the blast furnace is crashed, the stroke state of the pipeline can be eliminated immediately; after the pipeline stroke is eliminated, the pressure of the furnace top is gradually increased; gradually increasing the pressure at the top of the blast furnace and reducing the actual wind speed of the blast furnace to a normal level; the material collapse depth is less than 2.5m, no additional coke is required to be added, otherwise, 2-5 t of additional coke is added according to the furnace temperature; recovering all operating parameters of the blast furnace; the invention can quickly and effectively eliminate the pipeline stroke of the blast furnace through accurate parameter adjustment, and realize the standardized operation of the blast furnace.)

1. A method for quickly eliminating the stroke of a blast furnace pipeline is characterized by comprising the following steps:

1) judging the pipe stroke state and the position of the pipe stroke of the blast furnace according to the pressure relation of the blast furnace and the static pressure point state of each layer of the furnace body;

2) reducing the top pressure of the blast furnace at a speed of 1-2 KPa/min;

3) improving the actual wind speed of the blast furnace;

4) the blast furnace is broken in the process of increasing the actual wind speed;

5) if the blast furnace is not broken in the process of increasing the wind speed, maintaining the actual wind speed at 260m/s, and continuously waiting until the material is broken;

6) after the blast furnace is crashed, the stroke state of the pipeline can be eliminated immediately;

7) after the pipeline stroke is eliminated, the pressure of the furnace top is gradually increased;

8) gradually increasing the pressure at the top of the blast furnace and reducing the actual wind speed of the blast furnace to a normal level;

9) the material collapsing depth is less than 2.5m, no additional coke is required to be added, the material collapsing depth is more than 2.5m, and 2-5 t of additional coke is added according to the furnace temperature;

10) and recovering all the operating parameters of the blast furnace.

2. The method for rapidly eliminating the blast furnace pipeline stroke according to the claim 1, wherein the actual blast furnace wind speed in the step 3) is increased to not more than 260m/s at most.

Technical Field

The invention relates to the technical field of metallurgy, in particular to a method for quickly eliminating the stroke of a blast furnace pipeline.

Background

In the daily production process of the blast furnace, due to the reasons of poor strength of raw fuel, increased powder, failure of furnace top distribution equipment or inadaptation of air quantity and air permeability of a material column and the like, abnormal development of airflow at a certain position of the inner cross section of the blast furnace can be caused, the local air permeability of the blast furnace is particularly strong, and further, a pipeline stroke is generated, so that the condition of the blast furnace is abnormal.

The occurrence of the pipeline stroke of the blast furnace can seriously damage the smooth running state of the blast furnace production and cause the consequences of the damage of a cooling wall of the blast furnace, the local bonding of the furnace wall and the like. Severe pipe runs can lead to blast furnace roof knocking. At the moment of knocking, the temperature and the pressure of the furnace top can be greatly increased, so that the safety of blast furnace top equipment and gas purification equipment is seriously influenced, and further, the fire at the furnace top of the blast furnace and the burning loss of a gas dust removal cloth bag can be possibly caused.

The untimely or improper treatment of the pipeline stroke can cause various economic and technical indexes of the blast furnace to seriously slide down, and serious major accidents in the aspects of quality and safety can be caused seriously.

In the daily production process of the blast furnace, a large amount of air reduction and pressure reduction are usually adopted when a pipeline stroke occurs, the stress balance of furnace materials in the blast furnace is damaged, and then material collapse is caused, so that the pipeline stroke is damaged.

The disadvantages of this method of operation are mainly the following:

firstly, the influence on the blast furnace is serious. The large amount of air reduction and pressure reduction can seriously affect the yield index of the blast furnace and cause the temperature of the blast furnace to fluctuate greatly. The long-time fluctuation of the furnace condition of the blast furnace is easily caused by improper follow-up measures.

Secondly, the processing time is later. The treatment measures of reducing the air and the pressure greatly have great influence on the blast furnace and are not generally adopted at the initial stage of pipeline stroke generation. When the pipeline stroke is developed to the middle stage or the later stage, the gas flow distribution in the blast furnace can be seriously damaged, the smooth operation of the blast furnace is seriously influenced, at the moment, the blast furnace is generally greatly reduced in wind and pressure, the materials in the blast furnace are collapsed manually, and the formed pipeline stroke of the blast furnace is damaged.

Thirdly, the handling opportunity is grasped and seriously judged by the subjective experience of the individual. The measures of reducing wind and pressure are adopted at the initial stage of the pipeline stroke, and the loss of the blast furnace is large. However, the time for taking measures is not uniform and has parameters or standards which can be directly judged, and only the experience of the blast furnace engineer can be relied on for subjective judgment. Too early and too late can have adverse effects on the blast furnace, and the proper time is difficult to grasp.

In a word, the existing method for processing the pipeline stroke of the blast furnace has no fixed operation method, has no reliable parameters or standards for reference, completely depends on the personal experience of a blast furnace worker, and cannot ensure the stable and smooth daily production of the blast furnace through the standardization of the blast furnace operation. Therefore, the invention aims to quickly and effectively eliminate the pipeline stroke of the blast furnace through standardized operation and ensure the stable and smooth running of the blast furnace.

Disclosure of Invention

In view of the problems in the prior art, the present invention aims to provide a method for quickly eliminating the pipe stroke of a blast furnace.

The technical scheme adopted by the invention for solving the technical problems is as follows: a method for quickly eliminating the stroke of a blast furnace pipeline comprises the following steps:

1) judging the pipe stroke state and the position of the pipe stroke of the blast furnace according to the pressure relation of the blast furnace and the static pressure point state of each layer of the furnace body;

2) reducing the top pressure of the blast furnace at a speed of 1-2 KPa/min;

3) improving the actual wind speed of the blast furnace;

4) the blast furnace is broken in the process of increasing the actual wind speed;

5) if the blast furnace is not broken in the process of increasing the wind speed, maintaining the actual wind speed at 260m/s, and continuously waiting until the material is broken;

6) after the blast furnace is crashed, the stroke state of the pipeline can be eliminated immediately;

7) after the pipeline stroke is eliminated, the pressure of the furnace top is gradually increased;

8) gradually increasing the pressure at the top of the blast furnace and reducing the actual wind speed of the blast furnace to a normal level;

9) the material collapsing depth is less than 2.5m, no additional coke is required to be added, the material collapsing depth is more than 2.5m, and 2-5 t of additional coke is added according to the furnace temperature;

10) and recovering all the operating parameters of the blast furnace.

Specifically, the actual wind speed of the blast furnace in the step 3) is increased to not more than 260m/s at most.

The invention has the following beneficial effects:

the method for quickly eliminating the pipeline stroke of the blast furnace designed by the invention quickly and effectively eliminates the pipeline stroke of the blast furnace through accurate parameter adjustment, realizes the standardized operation of the blast furnace, and avoids the economic and technical index loss of the blast furnace caused by the error judgment of the static pressure of the working length of the blast furnace, even the abnormality of the furnace condition.

Detailed Description

The technical scheme in the embodiment of the invention is clearly and completely further detailed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A method for quickly eliminating the stroke of a blast furnace pipeline comprises the following steps:

1) judging the pipe stroke state and the position of the pipe stroke of the blast furnace according to the pressure relation of the blast furnace and the static pressure point state of each layer of the furnace body;

2) reducing the top pressure of the blast furnace at a speed of 1-2 KPa/min;

3) improving the actual wind speed of the blast furnace to a maximum value of no more than 260 m/s;

4) the blast furnace is broken in the process of increasing the actual wind speed;

5) if the blast furnace is not broken in the process of increasing the wind speed, maintaining the actual wind speed at 260m/s, and continuously waiting until the material is broken;

6) after the blast furnace is crashed, the stroke state of the pipeline can be eliminated immediately;

7) after the pipeline stroke is eliminated, the pressure of the furnace top is gradually increased;

8) gradually increasing the pressure at the top of the blast furnace and reducing the actual wind speed of the blast furnace to a normal level;

9) the material collapsing depth is less than 2.5m, no additional coke is required to be added, the material collapsing depth is more than 2.5m, and 2-5 t of additional coke is added according to the furnace temperature;

10) and recovering all the operating parameters of the blast furnace.

The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.

The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.