阅读说明：本技术 一种高炉炉缸热电偶在线安装方法 (Online installation method for blast furnace hearth thermocouple ) 是由 王伟 陈辉 徐萌 陈建 孙健 武建龙 梁海龙 李荣昇 朱利 郑朋超 于 2020-07-10 设计创作，主要内容包括：本发明公开了一种高炉炉缸热电偶在线安装方法,属于冶金技术领域。所述高炉炉缸热电偶在线安装方法包括以下步骤：将已损坏的热电偶的金属套管切除；在炉皮上开孔,开孔位置与已损坏的热电偶的位置相对应；在开孔位置对炉皮内灌浆料层进行切削,当进行切削时,通过新的热电偶进行测温,获得温度数值,将温度数值与阈值进行比较,确定新的热电偶的安装位置；将已损坏的热电偶抽出；将新的热电偶插入新的热电偶的安装位置。本发明高炉炉缸热电偶在线安装方法可实现不停炉在线安装热电偶温度监测点,安装高效,省时省力,能够减少高炉炉缸侧壁温度缺失,给炼铁工作者以直观完整数据判断炉缸工作状态变化。(The invention discloses an online installation method of a blast furnace hearth thermocouple, belonging to the technical field of metallurgy. The online installation method of the blast furnace hearth thermocouple comprises the following steps: cutting off the metal sleeve of the damaged thermocouple; forming a hole in the furnace shell, wherein the position of the hole corresponds to the position of the damaged thermocouple; cutting the grouting material layer in the furnace shell at the hole opening position, measuring the temperature through a new thermocouple when cutting to obtain a temperature value, and comparing the temperature value with a threshold value to determine the installation position of the new thermocouple; drawing out the damaged thermocouple; a new thermocouple is inserted into the installation location of the new thermocouple. The online installation method of the blast furnace hearth thermocouple can realize online installation of the thermocouple temperature monitoring point without stopping the furnace, has high installation efficiency, saves time and labor, can reduce the temperature loss of the side wall of the blast furnace hearth, and can judge the change of the working state of the hearth by visual and complete data for iron-smelting workers.)

1. An on-line installation method of a blast furnace hearth thermocouple is characterized by comprising the following steps:

cutting off the metal sleeve of the damaged thermocouple;

forming a hole in the furnace shell, wherein the position of the hole corresponds to the position of the damaged thermocouple;

cutting the grouting material layer in the furnace shell at the hole opening position, measuring the temperature through a new thermocouple when cutting to obtain a temperature value, and comparing the temperature value with a threshold value to determine the installation position of the new thermocouple;

drawing out the damaged thermocouple;

a new thermocouple is inserted into the installation location of the new thermocouple.

2. The online installation method of the blast furnace hearth thermocouple according to claim 1, characterized in that:

opening a hole on the furnace shell to obtain a sleeve;

when the damaged thermocouple is extracted, the sleeve is inserted into the hole and welded with the furnace shell.

3. The online installation method of the blast furnace hearth thermocouple according to claim 1, characterized in that:

when the temperature value is less than the threshold value, the slurry layer in the furnace shell needs to be cut continuously;

when the temperature value is equal to the threshold value, the cutting position is the new thermocouple installation position.

4. The online installation method of the blast furnace hearth thermocouple according to claim 1, characterized in that:

and when the damaged thermocouple is extracted, cleaning the grouting material powder in the hole.

5. The on-line installation method of a blast furnace hearth thermocouple according to claim 1, wherein said inserting a new thermocouple into an installation position of the new thermocouple comprises the steps of:

fixedly arranging a metal sleeve of a new thermocouple on a furnace shell;

a first flange plate is fixedly arranged at the end part of the metal sleeve of the new thermocouple, which is far away from the furnace shell;

fixedly mounting a protection tube on the second flange plate, inserting a new thermocouple into the protection tube, and inserting the new thermocouple into the hole by the protection tube penetrating through a metal sleeve of the new thermocouple;

when the new thermocouple reaches the mounting position, the second flange is fastened to the first flange.

6. The online installation method of the blast furnace hearth thermocouple according to claim 5, characterized in that:

the metal sleeve and the protective tube of the new thermocouple are coaxial with the bore.

7. The online installation method of the blast furnace hearth thermocouple according to claim 5, characterized in that:

when the second flange plate is fastened with the first flange plate, the polyester grouting material is injected into gaps among the metal sleeve of the new thermocouple, the protection tube and the carbon brick through the grouting hole of the metal sleeve of the new thermocouple.

8. An on-line installation method of a blast furnace hearth thermocouple is characterized by comprising the following steps:

determining the nearest position to the damaged thermocouple according to the design of the blast furnace, and opening a hole at the position;

cutting the grouting material layer in the furnace shell at the hole opening position, measuring the temperature through a new thermocouple when cutting to obtain a temperature value, and comparing the temperature value with a threshold value to determine the installation position of the new thermocouple;

a new thermocouple is inserted into the installation location of the new thermocouple.

9. The online installation method of the blast furnace hearth thermocouple according to claim 8, characterized in that:

the position of the opening corresponds to the gap between two adjacent cooling walls.

10. The online installation method of the blast furnace hearth thermocouple according to claim 8, characterized in that:

opening a hole on the furnace shell to obtain a sleeve;

when the position of the opening is determined, inserting the sleeve into the opening and welding the sleeve with the furnace shell;

the center of the sleeve is provided with a through hole, and the diameter of the through hole is matched with that of the protection tube of the new thermocouple.

Technical Field

The invention relates to the technical field of metallurgy, in particular to an online mounting method for a thermocouple of a blast furnace hearth.

Background

The safe and long service life of the blast furnace hearth is a research topic which is very important for ironmaking workers. The design life of a modern large-scale blast furnace first-generation furnace is usually about 20 years, but in the production practice of most blast furnaces, the temperature of the side wall of a hearth rises, even the hearth burns through accidents happen, and the safety and the long life of the blast furnace are seriously restricted.

The modern blast furnace hearth and bottom erosion monitoring is based on hearth and bottom temperature measurement couple data, so the integrity and accuracy of the thermoelectric even data are of great importance. At the beginning of blast furnace design at home and abroad, a certain number of temperature measuring couples are pre-buried at the hearth and the bottom of the hearth, especially in a hearth elephant foot area which is easy to corrode.

However, in the production practice, it is found that with the time and the influence of the external environment, the phenomenon of damage of some thermocouples inevitably occurs after the thermocouples are used for a period of time, and particularly, the thermocouples in the hearth region at the end of the campaign are damaged in a large area, so that the temperature data of the side wall of the hearth is lost, and huge hidden dangers are brought to the erosion monitoring and production safety of the blast furnace hearth.

Disclosure of Invention

The invention provides an online installation method of a blast furnace hearth thermocouple, which solves or partially solves the technical problems that in the prior art, a part of thermocouples are damaged after being used for a period of time, so that temperature data of the side wall of a hearth is lost, and huge hidden dangers are brought to erosion monitoring and production safety of the blast furnace hearth.

In order to solve the technical problem, the invention provides an online mounting method of a blast furnace hearth thermocouple, which comprises the following steps: cutting off the metal sleeve of the damaged thermocouple; forming a hole in the furnace shell, wherein the position of the hole corresponds to the position of the damaged thermocouple; cutting the grouting material layer in the furnace shell at the hole opening position, measuring the temperature through a new thermocouple when cutting to obtain a temperature value, and comparing the temperature value with a threshold value to determine the installation position of the new thermocouple; drawing out the damaged thermocouple; a new thermocouple is inserted into the installation location of the new thermocouple.

Further, a sleeve is obtained by opening a hole on the furnace shell; when the damaged thermocouple is extracted, the sleeve is inserted into the hole and welded with the furnace shell.

Further, when the temperature value is less than the threshold value, the grouting material layer in the furnace shell needs to be cut continuously; when the temperature value is equal to the threshold value, the cutting position is the new thermocouple installation position.

Further, when the damaged thermocouple is drawn out, the grouting powder in the hole is cleaned.

Further, the inserting a new thermocouple into the installation position of the new thermocouple comprises the following steps: fixedly arranging a metal sleeve of a new thermocouple on a furnace shell; a first flange plate is fixedly arranged at the end part of the metal sleeve of the new thermocouple, which is far away from the furnace shell; fixedly mounting a protection tube on the second flange plate, inserting a new thermocouple into the protection tube, and inserting the new thermocouple into the hole by the protection tube penetrating through a metal sleeve of the new thermocouple; when the new thermocouple reaches the mounting position, the second flange is fastened to the first flange.

Further, the metal sleeve and the protective tube of the new thermocouple are coaxial with the bore.

Further, when the second flange plate is fastened with the first flange plate, the polyester grouting material is injected into gaps among the metal sleeve of the new thermocouple, the protection tube and the carbon brick through the grouting hole of the metal sleeve of the new thermocouple.

Based on the same inventive concept, the application also provides an online installation method of the blast furnace hearth thermocouple, which comprises the following steps: determining the nearest position to the damaged thermocouple according to the design of the blast furnace, and opening a hole at the position; cutting the grouting material layer in the furnace shell at the hole opening position, measuring the temperature through a new thermocouple when cutting to obtain a temperature value, and comparing the temperature value with a threshold value to determine the installation position of the new thermocouple; a new thermocouple is inserted into the installation location of the new thermocouple.

Further, the position of the opening corresponds to the gap between two adjacent staves.

Further, a sleeve is obtained by opening a hole on the furnace shell; when the position of the opening is determined, inserting the sleeve into the opening and welding the sleeve with the furnace shell; the center of the sleeve is provided with a through hole, and the diameter of the through hole is matched with that of the protection tube of the new thermocouple.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

as the metal sleeve of the damaged thermocouple is cut off; the method comprises the steps of forming a hole in a furnace shell, wherein the hole corresponds to a damaged thermocouple, cutting a grouting material layer in the furnace shell at the hole, measuring temperature through a new thermocouple when cutting is performed, obtaining a temperature value, comparing the temperature value with a threshold value, determining the installation position of the new thermocouple, and extracting the damaged thermocouple; the novel thermocouple is inserted into the mounting position of the novel thermocouple, so that the thermocouple temperature monitoring point can be mounted on line without stopping the furnace, the mounting is efficient, time and labor are saved, the temperature loss of the side wall of the blast furnace hearth can be reduced, the erosion monitoring of the blast furnace hearth can be ensured to be normally carried out, the working state change of the hearth can be judged by visual complete data for iron-smelting workers, and the production safety is ensured.

Because the nearest position of the damaged thermocouple is determined according to the design of the blast furnace, the hole is formed in the position, the grout layer in the furnace shell is cut at the hole forming position, when the cutting is carried out, the temperature is measured through the new thermocouple, the temperature value is obtained, the temperature value is compared with the threshold value, the mounting position of the new thermocouple is determined, and the new thermocouple is inserted into the mounting position of the new thermocouple, therefore, the thermocouple temperature monitoring point can be mounted on line without stopping the furnace, the mounting is efficient, the time and the labor are saved, the temperature loss of the side wall of the blast furnace hearth can be reduced, the corrosion monitoring of the blast furnace hearth can be normally carried out, the working state change of the hearth is judged according to visual complete data for iron-smelting workers, and the production safety is ensured.

Drawings

FIG. 1 is a schematic flow chart of a first embodiment of a method for online installation of a blast furnace hearth thermocouple according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a second embodiment of the method for online installation of a blast furnace hearth thermocouple provided in the embodiments of the present invention;

fig. 3 is a schematic structural diagram of a blast furnace hearth according to an embodiment of the present invention.

Detailed Description