KR101109098B1 - System for measuring thickness of a melting furnace and a method thereof - Google Patents

Abstract

A furnace body thickness measurement system is therefore provided. A first resistor portion and a second resistor portion which are installed to be embedded in the inner wall of the furnace body and are worn together as the surface of the inner wall of the furnace body wears to change resistance values; And a resistance measuring unit connected to the first resistor unit and the second resistor unit to measure a resistance difference value between the first resistor unit and the second resistor unit. Since the thickness is measured using the difference, the furnace body thickness can be measured without being affected by the change in the resistance value due to the temperature change.

Blast furnace, furnace body, thickness, resistance, parallel connection

Description

System for measuring thickness of a melting furnace and a method

The present invention relates to a system and method for measuring the thickness loss of a furnace caused during operation of the blast furnace, and more particularly, to detect the change in resistance of the resistance rod inserted in the inner part of the furnace inner wall of the furnace to continuously change the thickness of the furnace body. It relates to a system and a method for measuring.

During operation of the blast furnace, debris on the inner wall of the blast furnace damages the inner wall by repeating the detachment process. In this way, if the inner wall of the blast furnace is damaged, there is a risk of explosion, etc. Therefore, a systematic measurement of the inner wall wear level is required.

There are three major techniques currently used to measure the wear of blast furnaces: 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 is less accurate to digitize according to the operation situation, mechanical methods also difficult to expect accurate measurement due to the residues attached to the inner wall.

On the other hand, the method using the electrical property change is to measure the wear level of the inner wall of the furnace by using the resistance of the furnace. This method also reacts sensitively to temperature, so it is appropriate to apply to furnaces whose temperature changes from time to time. There was a problem that it is necessary.

In addition, all three methods described above can vary greatly depending on the skill of the operator, and it is difficult to prepare for the sudden change that may occur when the change in the thickness of the body can be detected only at the measurement point.

The present invention has been made to solve the above problems, an object of the present invention is to provide a blast furnace furnace thickness measurement system capable of measuring the thickness of the blast furnace furnace irrespective of the operator.

Another object of the present invention is to provide a blast furnace body thickness measurement system capable of measuring the thickness of the furnace body continuously changing.

Still another object of the present invention is to provide a system in which the blast furnace can notify itself of the amount of wear of the inner wall while minimizing the effect of temperature change of the resistance in measuring the thickness of the furnace body using a resistance bar.

Another object of the present invention is to provide a blast furnace body thickness measurement system capable of reliably measuring the thickness of a desired portion at a desired time without additional harmful effects.

In order to achieve the above object, according to an aspect of the present invention, the first resistor portion and the second is installed so as to be embedded in the inner wall of the blast furnace furnace body and the wear resistance is changed as the surface of the inner wall of the furnace body wears Resistance unit; And a resistance measuring part connected to the first resistance part and the second resistance part to measure a resistance difference value of the first resistance part and the second resistance part.

In this case, each of the first resistor portion and the second resistor portion is formed in the form of a resistor bar in which a plurality of resistors are connected in parallel, and the rod-shaped first resistor portion and the second resistor portion are perpendicular to the surface of the inner wall. It is preferred to be arranged.

In this case, the plurality of resistors of the first and second resistor units may be made of different materials.

At this time, it is preferable that the plurality of resistors connected in parallel with the first resistor portion and the second resistor portion are located side by side at the same depth from the inner wall of the furnace body.

In addition, the blast furnace furnace body thickness measurement system may further include a resistance support seated on one side of the first resistance portion and the second resistance portion and the other side is fixed to the inner side of the inner wall of the furnace body.

On the other hand, the first resistor portion and the second resistor portion is composed of a plurality, the plurality of first resistor portion and the second resistor portion of the furnace body to measure the amount of wear of the inner wall of the furnace body at different positions of the furnace body; They can be installed in different positions respectively.

On the other hand, the blast furnace furnace body thickness measurement system may further include a furnace body thickness calculation unit for calculating the wear amount of the inner wall of the furnace body according to the resistance difference value measured by the resistance measuring unit.

According to another aspect of the present invention, a furnace inner wall thickness corresponding to a calculated value of a resistance difference according to the number of resistors according to the number of resistors composed of a plurality of first resistors connected in parallel and a plurality of second resistors connected in parallel. Providing a calculation; Providing the first resistor portion and the second resistor portion to an inner side of a furnace inner wall; Measuring a resistance difference between the first and second resistor units; There is provided a blast furnace furnace thickness measuring method comprising comparing the resistance difference measurement value with the resistance difference calculation value and calculating a thickness of a current furnace inner wall.

The blast furnace furnace body thickness measurement system according to the present invention can be applied directly to various holes existing in the furnace body for measuring the current pressure, and once installed, the measurement value is automatically notified as the resistance rod is worn without additional management. Can be obtained continuously.

In addition, the blast furnace furnace body thickness measurement system according to the present invention measures the thickness using the resistance difference between two different resistances, it is possible to measure the blast furnace body thickness without being affected by the change in the resistance value due to temperature changes.

In addition, the blast furnace furnace body thickness measurement system according to the present invention is not affected by the internal attachment can be expected reliable results.

In the furnace wall thickness measuring system according to an embodiment of the present invention, an additional device is installed through a pressure hole or the like to measure the amount of wear regardless of the type of the furnace wall, and a physical change such as a thickness change of the furnace is changed to an electrical property. A method of measuring the thickness of the furnace body by converting is used. In other words, when the blast furnace is operated by inserting a resistance rod into the wall of the furnace body, the furnace body wears and also causes the wear of the resistance rod. This causes a change in resistance of the resistance rod and continuously measures the resistance change to measure the remaining thickness of the furnace wall. .

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

1 is a block diagram of a blast furnace furnace body thickness measurement system according to an embodiment of the present invention, Figure 2 illustrates a process of measuring the thickness of the furnace body using the furnace body thickness measurement system according to an embodiment of the present invention. It is a conceptual diagram to do.

1 and 2, the blast furnace furnace body thickness measuring system 1 according to an embodiment of the present invention may include a first resistance part 10, a second resistance part 20, a resistance value measurement part 30, And a power supply 40 and a thickness calculator 50.

Referring to FIG. 2, the first resistor unit 10 and the second resistor unit 20 are each formed in the form of a resistance bar in which a plurality of resistors are connected in parallel. The first resistor portion 10 and the second resistor portion 20 are provided on the inner portion 2 of the furnace inner wall 4. In this case, the inner portion 2 of the inner wall of the furnace in which the first and second resistance parts 10 and 20 are installed may be a sidewall of a hole already formed in the inner wall of the furnace. By providing the first resistor portion and the second resistor portion in the hole already installed in the furnace body, the present system can measure the thickness of the furnace body inner wall in a simple manner.

According to an embodiment of the present invention, the first resistance part 10 and the second resistance part 20 having a resistance bar shape are installed in a hole formed in the inner wall of the furnace body so that the surface of the inner wall of the furnace body wears the first resistance part. The ends adjacent to the surface of the furnace inner wall of the 10 and the second resistor 20 are worn together. As the inner wall 4 of the furnace body wears, when the ends of the first and second resistance parts 10 and 20 wear together, the resistance of the first and second resistance parts 10 and 20 is reduced. The value will be different. According to an embodiment of the present invention, the amount of wear on the surface of the inner wall of the furnace body is measured by measuring a difference between the resistance values of the first and second resistance parts 10 and 20, the resistance of which varies as the surface of the inner wall of the furnace body wears. The body thickness can be measured by measuring.

As described above, in order for the resistance values of the first and second resistor parts 10 and 20 to vary as the inner wall of the furnace body is worn, the first resistor part 10 is Five first resistors 11, 12, 13, 14 and 15 are connected in parallel. In this case, the first resistors 11, 12, 13, 14, and 15 are formed to be spaced apart from each other at predetermined equal intervals. At this time, when the first resistor portion 10 is installed on the inner side of the furnace inner wall, one end of the first resistor portion 10, that is, the first first resistor 11, is positioned at the same height as the surface of the furnace inner wall. The intervals of the first resistors 11, 12, 13, 14, and 15 may be configured to have an interval of, for example, about 10 mm to 20 mm depending on the thickness of the inner wall of the furnace body. At this time, the interval and the number of the resistance may be formed in various ways depending on the thickness and state of the blast furnace inner wall to be installed.

On the other hand, the second resistor unit 20 is disposed parallel to the first resistor unit 10 at a position adjacent to the first resistor unit 10. In the present embodiment, the second resistors 21, 22, 23, 24, and 25 installed in the second resistor unit 20 are configured in total, and each of the second resistors 21, 22, 23, 24, 25 are installed at the same height at the same interval as the mutual separation interval of the first resistor (11, 12, 13, 14, 15) of the first resistor portion (10). Thus, the second resistors are installed at the same height side by side with the first resistors, so that when the inner wall is worn and the first resistors of the predetermined height are removed, the second resistors of the same height are also worn together, so that the first resistor is This is to ensure that the resistance difference between the negative and second resistor portions is kept constant with height.

Meanwhile, the first resistors 11, 12, 13, 14, and 15 of the first resistor unit 10 and the second resistors 21, 22, 23, 24, and 25 of the second resistor unit 20 are thermodynamic properties. Is similar but preferably made of different materials.

On the other hand, when the first resistor portion 10 and the second resistor portion 20 are installed on the inner wall of the furnace body, it is preferable that the first resistor portion 10 and the second resistor portion 20 are provided in a radial direction from the center of the furnace body in a direction perpendicular to the surface of the furnace inner wall. However, the first resistor portion 10 and the second resistor portion 20 do not necessarily have to be arranged in a direction perpendicular to the furnace body surface, but may be arranged in an inclined form. However, even in this case, the interval between the first and second resistors of the first and second resistors 10 and 20 should be maintained uniformly so that the thickness of the furnace body wall according to the resistance difference value can be accurately measured. Can be.

In this case, the first resistor portion 10 and the second resistor portion 20 are preferably located adjacent to each other. Since the wear amount of the inner wall of the furnace is calculated by measuring the resistance difference between the first and second resistor parts 10 and 20, the first and second resistor parts 10 and 20 are spaced apart from each other. This is because the thickness of the inner wall of the furnace body in which the first resistor unit 10 is located may be different from the thickness of the inner wall of the furnace body in which the second resistor unit 20 is located.

Thereafter, a resistance support 60 is provided to fix the first resistance portion 10 and the second resistance portion 20 to each other. In this way, the first resistor unit 10 and the second resistor unit 20 are installed on the resistance support 60, so that the first resistance unit 10 only needs to be fixed to the groove formed in the inner wall of the furnace body. ) And the second resistor unit 20 can be easily installed on the inner wall of the furnace body. When the resistance support is used in this way, it can be determined by measuring the thickness of the inner wall at the position of the inner wall of the furnace body in which the resistance support is installed.

On the other hand, in order to measure the resistance difference between the first resistor 10 and the second resistor 20 provided on the inner wall of the furnace body, the first resistor 10 and the second resistor 20 are each a resistance measurer. 30 is electrically connected. In this case, the resistance measuring unit 30 measures the resistance of the first resistor unit in which the first resistors are connected in parallel and the second resistor unit in which the second resistors are connected in parallel.

The resistance value of the first resistor unit 10 and the resistance value of the second resistor unit 20 measured as described above are calculated as resistance difference values in the thickness calculator 50, and the corresponding resistance difference in the thickness calculator 50. The thickness of the inner wall can be calculated by determining the number of resistors corresponding to the value.

In more detail, according to an embodiment of the present invention, since the number of resistances of the first resistor portion 10 and the second resistor portion 20 varies according to the degree of wear of the inner wall of the furnace body, the thickness of the inner wall of the furnace body may vary. Accordingly, the resistance values of the first resistor portion 10 and the second resistor portion 20 are different. Accordingly, the resistance difference between the first resistor portion 10 and the second resistor portion 20 is also the thickness of the furnace inner wall. Will depend on.

Therefore, in the furnace inner wall thickness measurement system 1 according to an embodiment of the present invention, after calculating the resistance difference value according to the number of resistances of the first resistor portion 10 and the second resistor portion 20 in advance, During the operation of the blast furnace, it is checked whether the resistance difference value of the first resistance unit 10 and the second resistance unit 20 measured using the system corresponds to the resistance difference value measured in advance. The inner wall thickness of the blast furnace body can be judged by checking whether it remains.

For example, referring to FIG. 2, when the inner wall thickness of the furnace body is initially L1, a total of five first resistors 11, 12, 13, 14, and 15 and second resistors 21, 22, 23, 24 and 25 are present in the first resistor portion 10 and the second resistor portion 20, respectively. When the inner wall of the furnace wears down and the inner wall thickness decreases from L1 to L2 during the operation of the blast furnace, when the inner wall is worn out, the first resistor 11 located at one end of the first resistor portion and the second resistor located at one end of the second resistor portion are worn. (21) fall out together, leaving only four resistors in the first and second resistor sections, respectively, thereby changing the resistance difference value of the first and second resistor sections. In addition, when the inner wall thickness decreases from L2 to L3 due to the operation of the additional blast furnace, two first resistors 11 and 12 are separated from the first resistor portion, and two second resistors are also removed from the second resistor portion. (21,22) falls off. As a result, a change occurs again in the resistance difference value of the first resistor portion and the second resistor portion. The operator using this system knows the calculated value of the resistance difference calculated in advance according to the number of resistances of the first resistor 10 and the second resistor 20, so that a change in the resistance difference may occur during blast furnace operation. In this case, it is possible to check how much the inner wall thickness of the furnace body has reached at the position where the first and second resistance parts 10 and 20 are installed in comparison with the calculated value.

The thickness calculating unit 50 calculates the thickness of the furnace inner wall corresponding to the resistance difference value which varies with the operation of the blast furnace. In this case, the thickness of the current inner wall of the furnace body is a value corresponding to the resistance difference value between the first and second resistance parts 10 and 20 measured by the current resistance value measuring part, and is calculated in advance. The thickness of the furnace body inner wall corresponding to the calculated value of the resistance difference value according to the number of resistances of the unit 10 and the second resistor unit 20 may be provided.

The power supply unit 40 is configured to operate the system by supplying power to the first resistor unit 10, the second resistor unit 20, and the resistance value measuring unit 30.

Meanwhile, although the resistance of the first and second resistors of the first and second resistors may vary depending on temperature, a factor for measuring the thickness of the inner wall of the furnace body according to an embodiment of the present invention. As a difference between the resistance values of the first and second resistor parts, the system according to the embodiment of the present invention has an advantage of not being greatly affected by the resistance value due to the change in temperature.

Meanwhile, the furnace inner wall thickness measurement system according to an exemplary embodiment of the present invention may include a plurality of first and second resistor pairs. The plurality of first and second resistor pairs may be connected to one resistance value measuring unit and a power supply unit. As described above, the plurality of first and second resistor pairs may be installed inside the inner wall of the furnace body at different positions. In this case, one system can be used to measure the thickness of the inner wall of a plurality of points where the inner wall of the furnace body is severely worn.

The method for measuring the inner wall thickness of the furnace body using the blast furnace furnace inner wall thickness measurement system having the above configuration is as follows.

First, a resistance difference value is calculated according to the number of resistances of the first resistor unit composed of a plurality of first resistors connected in parallel and the second resistor unit composed of a plurality of second resistors connected in parallel, and the inner wall thickness corresponding to the calculated resistance difference value is calculated. (S301) Accordingly, the furnace inner wall thickness according to the remaining number of resistors is calculated.

In the system according to an embodiment of the present invention, the first resistor portion and the second resistor portion are installed at positions where the thickness of the furnace inner wall is required among the furnace inner walls.

Thereafter, during the operation of the blast furnace, the resistance difference value of the first resistor portion and the second resistor portion is measured continuously or at regular time intervals. (S303)

By comparing the measured resistance difference measured value with the resistance difference calculated value, the number of remaining resistances can be confirmed, and the thickness of the current furnace inner wall can be measured by checking the number of remaining resistances as described above (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 body thickness measurement system according to an embodiment of the present invention,

2 is a view showing a resistance that depends on the thickness of the furnace body when using the furnace body thickness measurement system according to an embodiment of the present invention, and

3 is a flow chart for measuring the furnace thickness of the blast furnace according to an embodiment of the present invention.

Explanation of symbols on main parts of drawing

2 inner part 4 furnace inner wall

10 First resistor section 11, 12, 13, 14, 15 First resistor

20 Second resistor 21, 22, 23, 24, 25 Second resistor

30 Resistance value measurement part 40 Power supply

50 Thickness Calculator 60 Resistance Support

Claims (8)

A first resistor portion and a second resistor portion which are installed to be embedded in the inner wall of the furnace body and are worn together as the surface of the inner wall of the furnace body wears to change resistance values; And A resistance measuring part connected to the first resistance part and the second resistance part so as to measure a resistance difference value of the first resistance part and the second resistance part; The first resistor portion and the second resistor portion, Each of the plurality of resistors are formed in the form of a resistance bar connected in parallel, The plurality of resistors, A blast furnace furnace thickness measuring system which is embedded in the inner wall of the blast furnace furnace and sequentially located in accordance with the depth. The method of claim 1, And the rod-shaped first and second resistor portions are disposed in a direction perpendicular to the surface of the inner wall. 3. The method of claim 2, The blast furnace body thickness measuring system according to claim 1, wherein each of the plurality of resistors of the first resistor portion and the second resistor portion is made of a different material. 3. The method of claim 2, And the plurality of resistors connected in parallel to the first resistor portion and the second resistor portion are located side by side at the same depth from the inner wall of the furnace body. The method of claim 1, The first and second resistance parts are seated on one side, and the other side further comprises a resistance support that can be fixed to the inside of the inner wall of the furnace body, blast furnace body thickness measuring system. The method of claim 1, The first resistor portion and the second resistor portion is composed of a plurality, And the plurality of first and second resistor portions are respectively installed at the different positions of the furnace body so as to measure the amount of abrasion of the inner wall surface of the furnace body at different positions of the furnace body. The method of claim 1, The furnace blast furnace thickness measuring system further comprises a furnace thickness calculator for calculating an amount of wear of the inner wall of the furnace according to the resistance difference measured by the resistance measurer. Composed of a plurality of first resistors connected in parallel to form a resistance bar, a plurality of first resistors are embedded in the inner wall of the blast furnace furnace body consisting of a first resistor unit and a plurality of second resistors connected in parallel sequentially Providing a furnace inner wall thickness calculation value corresponding to a resistance difference calculated value according to the number of resistances of the second resistor unit formed in a resistance bar and having a plurality of second resistors embedded in an inner wall of the blast furnace furnace and sequentially positioned according to depth; Providing the first resistor portion and the second resistor portion to an inner side of a furnace inner wall; Measuring a resistance difference between the first and second resistor units; And comparing the resistance difference measured value with the resistance difference calculated value and calculating a thickness of a current furnace inner wall.

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