KR20110035076A - Stave having isolated wire and system for measuring thickness of a melting furnace using the same - Google Patents

Abstract

PURPOSE: A stave with an isolated wire and a system for measuring the thickness of a melting furnace using the same are provided to enable a worker to easily confirm the changed thickness of the stave and to reduce a measuring error. CONSTITUTION: A system for measuring the thickness of a melting furnace using a stave comprises a current receiving unit(20), a current supply unit(10), and a current measurement unit(30). The current receiving unit has multiple isolated wires. The isolated wires are installed inside the inner wall of a melting furnace. The current supply unit supplies currents to the inside the melting furnace to flow the currents to the current receiving unit through the isolated wires. From the current measurement area is the current supply unit. The current measurement unit measures which isolated wire flows the currents.

Description

Stave having isolated wire and system for measuring thickness of a melting furnace using the same}

 The present invention relates to a blast furnace body thickness measuring system having an insulated wire, and more particularly, to a blast furnace furnace body that can continuously measure the change in the thickness of the stave or blast furnace inner wall by detecting the flow of current using the insulated wire. A thickness measurement system.

In the operation of the blast furnace, debris adhered to the inner wall damages the inner wall by repeatedly removing and attaching the inner wall. If the inner wall is damaged, there is a risk of explosion, and thus a systematic measurement of the inner wall wear is required.

The techniques currently used to measure the wear of the blast furnace can be divided into three categories: thermodynamic estimation, mechanical measurements, and electrical property changes.

Japanese Patent Publication No. 57-39288 discloses a method for determining the dropping of a deposit from a sudden change in the furnace wall temperature measured using a plurality of thermometers installed in the furnace tail. Also, Japanese Patent Publication No. 59-6888 In this paper, we propose a method for determining the formation of deposits when the periodicity is lost by continuously measuring the temperature change that changes periodically in response to the charging cycle of coke and ore.

On the other hand, Korean Patent Laid-Open Publication No. 1995-0010238 uses the temperature information of thermocouples installed on the furnace wall edges to quantitatively detect the thickness of the deposit from the correlation between the thickness of the deposit and the thermocouple temperature. A method for measuring deposit thickness of blast furnace furnace walls is proposed to quantitatively identify dropout situations.

However, such a thermodynamic method has a problem in that the accuracy of digitization decreases according to the operation situation, and the mechanical method is difficult to expect accurate measurement due to residues attached to the inner wall.

On the other hand, the method used as a change in electrical properties is to use the resistance of the furnace body, which is also sensitive to the temperature, so it is not appropriate to apply to the furnace body that the temperature changes frequently depending on the operating situation.

In addition, all three methods described above can vary greatly depending on the skill of the measurer, and it is difficult to set a measurement cycle for sudden changes in the furnace body that may occur at any time.

On the other hand, a stave is a rectangular parallelepiped structure provided on the furnace wall for the purpose of blast furnace cooling. The stave is installed inside the blast furnace shell and is divided into 11 stages in the blast furnace height direction.In the circumferential direction, there are 8 exits for each stage, 36 sheets for T1 to S7 stages, and 24 sheets for S8 ~ S9 stages. It consists of hawks.

Looking at the structure of the stave, a rectangular box shape of a constant size and a plurality of cooling pipes are arranged at regular intervals inward, and the water supply pipe at the bottom and the drain pipe at the top protrude. On the other hand, the material of the stave is spheroidal graphite cast iron is to maintain the surface temperature of 770 ℃ or less transformation point. At this time, a thermometer is installed inside the stave for temperature management.

The back of the stave is fixed to the blast furnace shell, and the lower stave drain pipe and the upper stave feed pipe are connected to each other by a pipe to form a pipeline to each other. At this time, when the cooling water is sent from the lower stave feed pipe, the cooling water is introduced into each cooling pipe, and the wear of the stave is suppressed.

As such, the stave, especially the copper stave, installed on the furnace wall for the purpose of blast furnace cooling, has excellent cooling performance but may be fatal when worn because of its thin thickness, so it is more important to measure the degree of wear.

Until now, various methods for measuring the wear level of the copper stave and the thickness of the furnace wall have been devised. However, due to the harsh environment such as high temperature, it is not effective.

Also, since these methods can only obtain thickness values at the time of measurement, they cannot cope with sudden changes that may occur when.

Therefore, there is a need to develop a stave in which the furnace itself indicates the degree of wear regardless of the measurer. In addition, the development of a furnace thickness measurement system that measures the wear level of the stave can continuously measure the thickness of the furnace body. This is necessary.

The present invention has been made in view of the necessity as described above, and an object of the present invention is to provide a blast furnace body thickness measurement system that can easily measure the amount of wear of the inner wall or stave without being affected by the temperature as much as possible.

Another object of the present invention is to provide a blast furnace furnace thickness measurement system capable of reliably measuring the thickness of a blast furnace furnace or a desired portion of a stave at a desired time.

In order to achieve the above object, according to an aspect of the present invention, a plurality of insulating wires are provided in the thickness direction of the furnace body inside the furnace blast furnace body inner wall, the separation distance from the surface of the inner wall to one end side A current receiver including a plurality of insulated wires each formed differently from each other; A current supply unit for supplying current into the furnace inner wall of the blast furnace so that current flows through the insulation wire to the current receiving unit; And a current measuring unit for measuring which of the plurality of insulating wires a current flows from the current supply unit to the current receiving unit.

At this time, it is preferable that the energized blast furnace furnace inner wall is a copper stave.

At this time, the plurality of insulating wires are preferably arranged in parallel with each other perpendicular to the surface of the furnace inner wall.

At this time, it is preferable that the separation distances from the surfaces of the inner walls of the plurality of insulating wires to the one end portion each constitute a multiple of a predetermined distance.

At this time, it is preferable that one end of one of the insulation wires of the plurality of insulation wires is positioned adjacent to the surface of the inner wall in which the furnace body is not worn.

On the other hand, the system further calculates the thickness of the worn inner wall by calculating the separation distance between the surface of the inner wall before wear from one end of the insulated wire in which no current flows based on the measured current measured in the current measuring unit It may include.

According to another aspect of the invention, the body is installed on the inner wall of the blast furnace; And a plurality of insulated wires installed inside the body in an inward direction of the blast furnace, and including a plurality of insulated wires formed at different distances from an upper surface to one end of the body, respectively. do.

At this time, the stave is preferably formed of a copper material.

In this case, the plurality of insulating wires are preferably arranged parallel to each other perpendicular to the top surface of the stave.

At this time, it is preferable that the separation distances from the top surface of the stave of the plurality of insulating wires to the one end side are each formed in multiples of a predetermined distance.

In addition, one end of one of the insulation wires of the plurality of insulation wires is preferably positioned such that the upper surface of the stave is adjacent to the upper surface of the non-wearing state.

According to the present invention, since the worn thickness of the stave can be easily checked, a serious level of damage can be prevented in advance, and since an administrator does not need any special measures, an error according to the measurer can be eliminated.

In addition, since current does not pass through the debris attached to the wall surface, it is possible to avoid the error caused by the debris measurement.

When replacing all staves with the ones proposed in the present invention, since the copper staves surround the entire blast furnace for cooling, the degree of wear of the furnace body, which could only be measured locally by the conventional method, can be identified at a glance. Will be.

According to an embodiment of the present invention, in order to use the change in electrical properties according to the change in the thickness of the furnace body, the insulation wire is installed in the thickness direction in the stave installed in the blast furnace, and whether a current flows in the insulation wire when the specific thickness is reduced. Determine the remaining thickness to determine.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 is a schematic configuration diagram of a furnace body thickness measuring system 1 according to an exemplary embodiment of the present invention, and FIG. 2 is a view illustrating a process of measuring furnace body thickness using the furnace body thickness measuring system 1.

Referring to FIG. 1, a furnace body thickness measuring system 1 according to an exemplary embodiment of the present invention may include a current supply unit 10, a current receiving unit 20, a current measuring unit 30, a thickness calculating unit 50, and a power supply. Supply part 40 is included.

The current supply unit 10 is a configuration for supplying current into the inner surface of the blast furnace furnace, that is, in the body 2 of the copper stave in this embodiment.

The current receiver 20 is configured to be installed inside the body 2 of the copper stave to receive the current supplied by the current supply unit 10. According to this embodiment, the current receiving portion is composed of a plurality of insulated wires 22, 24, 26. More specifically, the plurality of insulated wires 22, 24, 26 are installed in the vertical direction in the interior of the stave, as seen in FIG. 1. At this time, the upper surface 4 of the stave in FIG. 1 is a surface facing inside when the stave is installed on the inner side of the blast furnace. Therefore, in the state where the stave is installed inside the blast furnace, the thickness of the stave may be represented by L1 in FIG. 1, and when the top surface of the stave is worn down to reduce the thickness, the thickness of L1 may be as shown in FIG. 2. Will be reduced to L2 or L3.

At this time, the plurality of insulated wires 22, 24, and 26 have different lengths, and as shown in FIG. 1, only electricity passes through the upper end, and the other parts are formed to be insulated as a whole. According to the present embodiment, as shown in FIG. 1, the first wire 22 of the plurality of insulated wires is formed to be substantially adjacent to the upper surface of the stave, and the second wire 24 is spaced apart from the upper surface by a predetermined distance. The third wire 26 has a distance spaced by twice the distance that the second wire is spaced from the top surface.

The distance from the upper surface of the first to third wires 22, 24, and 26 is a distance for measuring the thickness of the worn stave, and the length may be selected according to the installation position and state of the stave. .

Preferably, the insulated wires are arranged side by side and are perpendicular to the upper surface, but the plurality of insulated wires are positioned at a height at which a height of an upper end portion through which electricity flows, that is, an upper end portion of the insulated wire. If the distance between the top surface and the stave is different from each other, it is not necessarily arranged to be parallel to each other or perpendicular to the top surface.

In addition, in the present embodiment, three insulation wires 22, 24, and 26 are provided as the current receiver 20, but the number of the insulation wires may be larger, and the number of the insulation wires may be increased and the mutual separation distance may be greater. The shorter the, the more precisely the thickness of the worn stave can be measured.

On the other hand, the current supply unit 10 and the current receiving unit 20 is connected to the current measuring unit 30.

The current measuring unit 30 measures which of the insulating wires of the insulating wire of the current receiving unit 20 the current supplied from the current supply unit 10 passes through.

In more detail, according to an embodiment of the present invention, in the state where the stave is initially installed, the thickness of the stave is L1, as can be seen in FIG. Thus, the current I exiting the current supply 10 may pass through the inside of the body 2 of the conductor stave and into all the insulated wires 22, 24, 26, in which case all the insulated wires 22. The current flowing through the 24 and 26 may be measured by the current measuring unit 30.

However, when the blast furnace is driven and the stave is worn, for example, when the thickness is reduced by the thickness of L2, the first wire 22 of the insulated wire is exposed to the outside of the stave at which the current flows. Therefore, the current exiting the current supply unit 10 cannot flow through the first wire 22, but only into the second wire 24 and the third wire 26. In addition, if the thickness of the stave is L3, no current will flow in the second wire 24 as well.

Therefore, when no current flows through the first wire 22 and only current flows through the second wire 24 and the third wire 26, the top surface of the stave wears to some extent, and the thickness of the stave is L1 to ~. It can be predicted that the L2, and if the current does not flow to the first and second wires 22 and 24 and only the current flows to the third wire 26, it can be predicted that the thickness of the stave is between L2 and L3.

On the other hand, the power supply unit 40 supplies power to the system to measure the current supplied from the current supply unit 10 to the current receiving unit 20.

The thickness calculating unit 50 calculates the spaced inner wall thickness by calculating a separation distance between one surface of the inner wall before wear from one end of the insulated wire through which no current flows, based on the measured current measured by the current measuring unit 30. Do it.

The operator of the system will be able to approximate the wear of the stave by checking which wire the current is flowing through, but the thickness calculation section will calculate the thickness of the stave more accurately and provide the results. If possible, more accurate measurement and control will be possible to prevent the risk of blast furnaces due to wear of the stave.

On the other hand, the blast furnace furnace body thickness measurement system according to an embodiment of the present invention is to install the insulation wire on the stave, it is possible to determine whether the current flows in the insulation wire, the current receiving portion including the insulation wire current If it is possible to install on the inner wall of the blast furnace furnace body having a communicating body, the degree of wear of the inner wall of the blast furnace furnace other than the stave will be measured in the same manner.

The stave that can be used in the blast furnace body thickness measurement system according to the present invention is attached to the inner surface of the blast furnace and is made of an electrically conductive material, so the wear level of the stave can be checked inside the stave body when the stave is manufactured. In order to provide a plurality of insulated wires of the current receiving portion provided in the system according to the present embodiment so as to provide the inside of the blast furnace, the amount of stave wear at the position where the stave is installed according to the present embodiment, that is, the amount of wear on the blast furnace inner wall is It can be easily measured using a body thickness measurement system according to an embodiment of the.

In addition, when installing a stave provided with a plurality of insulated wires in the entire blast furnace inner wall according to an embodiment of the present invention, it is possible to measure the amount of the inner wall wear of the blast furnace, so that it is easy to manage the risk due to wear of the blast furnace inner wall. have.

The method of measuring the thickness of an blast furnace inner wall using the blast furnace inner wall thickness measuring system which consists of such a structure is demonstrated.

First, a plurality of insulated wires are installed in the furnace blast furnace inner wall in the thickness direction of the furnace body (S301). At this time, a distance from the surface of the inner wall of the furnace body to one end of the plurality of insulated wires is different from each other. To form. Further, the separation distances from the surfaces of the inner walls of the plurality of insulating wires to the one end side each constitute a multiple of a predetermined distance. This step includes installing a plurality of insulated wires having the configuration as described above inside the copper stave, and installing a copper stave provided with the insulated wire on the inner wall of the blast furnace body.

Thereafter, the blast furnace is operated, a current flows through the blast furnace furnace inner wall, and the current flowing through the plurality of insulated wires is measured. (S302)

In this way, the current is measured to check whether there is an insulated wire through which no current flows. (S303) An insulated wire through which no current flows is generated at the position where the wear of the stave occurs. Therefore, when an insulation wire through which no current flows, it can be judged that the surface of the furnace inner wall at the position where the insulation wire is installed is worn out than the depth of the end portion of the insulation wire.

Therefore, the thickness of the furnace inner wall is calculated by calculating the amount of wear on the inner wall surface of the furnace by calculating the separation distance between the one end of the insulation wire and the furnace body in which no current flows among the plurality of insulation wires. (S304)

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments set forth herein, and those skilled in the art who understand the spirit of the present invention, within the scope of the same idea, the addition of components Other embodiments may be easily proposed by changing, deleting, adding, and the like, but this will also fall within the spirit of the present invention.

1 is a block diagram of a furnace thickness measurement system of a blast furnace using an insulated wire according to an embodiment of the present invention,

2 is a view showing a state in which the insulation thickness according to an embodiment of the present invention by using the furnace thickness measurement system of the blast furnace to measure the changed state of the furnace body thickness, and

3 is a flow chart for measuring the furnace thickness of the blast furnace using the furnace thickness measurement system of the blast furnace using an insulated wire according to an embodiment of the present invention.

Explanation of symbols on main parts of drawing

2 Stave Body 4 Top View

10 Current supply section 20 Current receiver section

22 First Wire 24 Second Wire

26 Third Wire 30 Current Measuring Unit

40 Power Supply 50 Thickness Computation

Claims (11)

A plurality of insulated wires installed in an inner wall of the furnace blast furnace body in a thickness direction of the furnace body, the current receiving part including a plurality of insulated wires formed at different distances from the surface of the inner wall to one end thereof; A current supply unit for supplying current into the furnace inner wall of the blast furnace so that current flows through the insulation wire to the current receiving unit; And And a current measuring unit for measuring which of the plurality of insulating wires a current flows from the current supply unit to the current receiving unit. The method of claim 1, The blast furnace furnace inner wall thickness measurement system, wherein the energized blast furnace furnace inner wall is a copper stave. The method of claim 1, And the plurality of insulated wires are arranged in parallel with one another perpendicular to the surface of the furnace inner wall. The method of claim 1, The blast furnace furnace inner wall thickness measuring system is formed so that a spaced distance from the surface of the said inner wall of the said plurality of insulating wires to the one end part may make multiple of a predetermined distance, respectively. The method of claim 1, One end of one of the plurality of insulated wires is located so as to be adjacent to the surface of the inner wall of the furnace body is not worn, blast furnace inner wall thickness measurement system. The method of claim 1, The blast furnace body further comprises a thickness calculator for calculating a worn inner wall thickness by calculating a separation distance between one surface of the inner wall before wear from one end of the insulated wire where no current flows based on the measured current measured by the current measuring unit. Inner wall thickness measurement system. Body installed on the inner wall of the blast furnace; And A plurality of insulated wire provided in the inner direction of the blast furnace in the interior of the body, comprising a plurality of insulated wires each having a different distance from the upper surface to one end of the body is formed differently. The method of claim 7, wherein The stave is formed of a copper material. The method of claim 7, wherein And the plurality of insulated wires are arranged side by side perpendicular to one another with respect to the stave top surface. The method of claim 7, wherein The distance from the top surface of the stave to the one end side of the plurality of insulated wires are each formed to be a multiple of a predetermined distance. The method of claim 7, wherein One end of one of the plurality of insulated wires is positioned so that the top surface of the stave is adjacent to the top surface in an unworn state.

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