JP2006249511A - Method and apparatus for evaluating deformation characteristic of plugging material for iron tapping hole in blast furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To evaluate deformation characteristic (power necessary for the deformation) of a plugging material for an iron tapping hole in a blast furnace without being affected by skid resistance between the plugging material and the wall surface of a mold. <P>SOLUTION: The plugging material for the iron tapping hole in the blast furnace, is filled into a space (the filling space of the plugging material for the iron tapping hole in the blast furnace) formed in the inner part of a dividable mold provided with the one side of cylindrical mold and the other side of cylindrical mold, and while one side of cylindrical mold is fixed, the other side of cylindrical mold is shifted in the direction perpendicular to the axial direction and thus the plugging material for the iron tapping hole in the blast furnace is shear-fractured, the shearing load at the time when the plugging material for the iron tapping hole in the blast furnace in the mold is shear-fractured, is measured and the deformation characteristic of the plugging material for the iron tapping hole in the blast furnace is evaluated. Further, the measurement of the shearing load is performed under condition of a prescribed controlling temperature and furthermore, the deformed quantity of the above mold at the shearing time and the shearing load are continuously measured. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for measuring deformation characteristics of a refractory material, and more particularly to a method for evaluating deformation characteristics of a blast furnace tap hole closing material and an apparatus for evaluating deformation characteristics of a blast furnace tap hole closing material.

  For stable operation of the blast furnace, the importance of the performance of the blast furnace outlet blockage material is increasing. In particular, due to the recent increase in brewing speed associated with the increase in size and pressure of blast furnaces, higher durability is required for the blast furnace discharge hole closing material.

  By the way, the filling performance of the blast furnace tap hole closing material into the tap hole is very important for stable operation of the blast furnace, and it is necessary to fill the tap hole with an appropriate pressure. Therefore, regarding the blast furnace tapping hole closing material, further optimization such as the viscosity of the binder, the composition of the fine powder portion, and the mixing of the particle sizes has been studied.

  As described above, while various studies are made on the composition of the blast furnace tap hole closing material, a method by a Marshall test is usually used as a method for evaluating the filling performance (see, for example, Patent Document 1). .

The marshall test will be described below with reference to FIG.
(1) First, a metal frame 52 is filled with a blast furnace outlet hole closing material (sample) 51.
(2) Next, the blast furnace outlet closing material (sample) 51 is raised together with the mold 52. At this time, the load is transmitted to the ring spring 54 through the extrusion die 53, and the ring spring 54 is deformed.
(3) The deformation amount of the ring spring 54 at this time is read with the dial gauge 55.
(4) Then, conversion is performed using a known spring constant of a ring spring to obtain a load at the time of extrusion (extrusion load), and the deformation performance of the blast furnace outlet hole closing material is evaluated based on the obtained load.
As described above, the evaluation method based on the Marshall test is widely used because it can be carried out easily.

  However, in actual use, the blast furnace tap hole plugging material is filled in the tap holes that are discharging iron iron of 1500 ° C. or higher. Furthermore, tar pitch, which is the main binder of the blast furnace exit hole plugging material, has a strong viscosity temperature dependency, and exhibits the lowest viscosity around 300 ° C.

  For this reason, in actual filling, the deformation characteristics near 300 ° C. have the strongest influence. However, in the Marshall test, since the blast furnace tap hole closing material and the mold are usually handled by the tester by hand, it is difficult to perform the test at a temperature exceeding 100 ° C.

  Furthermore, the extrusion load measured by the Marshall test is a combination of the viscosity of the blast furnace tap hole plugging material and the slip resistance of the mold wall surface, and the deformation characteristics of the blast furnace tap hole plugging material itself are physically accurate. The actual situation is not measured.

  In addition, although the test operation itself is simple, the Marshall test work is unstable with the process of assembling the mold, filling it with the blast furnace exit hole plugging material, placing each on a predetermined gantry, and pushing it up vertically Since this test is a test method with a structure that is difficult to automate and continue, the load on the tester is large.

  In addition to the Marshall test, there is a method for measuring the viscoelasticity using a double cylinder viscometer as a method for evaluating the deformation characteristics of a substance. This method is used for a relatively low viscosity liquid. It is. However, since the blast furnace tap hole closing material is a plastic, it is impossible to apply such a method.

  As for the deformation behavior of an elastic body, there is known a method of examining the deformation characteristics by applying a load by bending three or four points on a molded object in a predetermined shape and measuring the load and displacement until breaking. It has been. However, even if the blast furnace exit hole plugging material is molded into a predetermined shape, it is deformed by its own weight when set in the evaluation device, so that it cannot be supported, and this method cannot be applied. .

Thus, for the blast furnace exit hole closing material, which is a plastic having an intermediate characteristic between the liquid and the elastic body, although there is a problem as described above, there is no appropriate method for evaluating the deformation characteristics, A method of evaluating by measuring an extrusion load by a Marshall test is widely used.
JP 2003-147422 A

  The present invention is capable of evaluating the deformation characteristics (magnitude of force required for deformation) of the blast furnace tap hole closing material, which is a plastic material, without being affected by slip resistance with the mold wall surface, For example, it is possible to evaluate deformation characteristics under high temperature of 100 ° C. or higher, or to continuously measure the amount of displacement of the mold and the shear load to accurately evaluate the deformation characteristics. It is an object of the present invention to provide a deformation characteristic evaluation method and a deformation characteristic evaluation apparatus for a blast furnace tap hole closing material.

In order to solve the above-mentioned problem, the deformation characteristic evaluation method of the blast furnace tap hole closing material of the present invention (Claim 1) is:
(a) Surfaces orthogonal to the axial direction become contact surfaces of each other, and in a state where the contact surfaces are in contact with each other, a space filled with a blast furnace discharge hole closing material is formed inside, Filling the separable mold with the mold and the other cylindrical mold with a blast furnace outlet hole closing material;
(b) One cylindrical mold is fixed, and the other cylindrical mold is moved in a direction perpendicular to the axial direction to shear break the blast furnace exit hole closing material in the mold, A step of measuring the shear load when the fistula blocking material breaks in shear;
and (c) determining a deformation characteristic of the blast furnace tap hole closing material from the shear load.

  According to a second aspect of the present invention, there is provided a method for evaluating deformation characteristics of a blast furnace tap hole closing material, wherein the measurement of the shear load in (b) is performed under a predetermined controlled temperature condition. It is characterized by that.

  According to a third aspect of the present invention, there is provided a method for evaluating deformation characteristics of a blast furnace tap hole plugging material according to the first or second aspect of the invention, wherein the displacement amount of the mold and the shear load during the shearing of (b) are continuously performed. It is characterized in that it measures automatically.

In addition, the deformation characteristic evaluation device for the blast furnace tap hole closing material of the present invention (Claim 4) is:
The cylindrical mold and the other, in which the surfaces perpendicular to the axial direction become mutual contact surfaces and in which the contact surfaces are in contact with each other, a filling space for the blast furnace discharge hole closing material is formed inside A separable mold with a cylindrical mold of
Mold driving means for fixing one cylindrical mold and moving the other cylindrical mold in a direction perpendicular to the axial direction to shear break the blast furnace outlet hole closing material in the mold;
And a shear load measuring means for measuring a shear load when the blast furnace exit hole closing material in the mold undergoes shear failure.

  The apparatus for evaluating deformation characteristics of a blast furnace tap hole closing material according to claim 5 controls the temperature of the blast furnace tap hole closing material in the configuration of the invention of claim 4 to a predetermined temperature when measuring the shear load. It is characterized by comprising heating means configured to be able to.

  According to a sixth aspect of the present invention, there is provided a deformation characteristic evaluating apparatus for a blast furnace tapping hole closing material according to the fourth or fifth aspect, wherein the displacement amount measuring means for continuously measuring the displacement amount of the mold during the shearing. And a shear load measuring means for continuously measuring the shear load at the time of shearing.

  As described above, the method for evaluating the deformation characteristics of the blast furnace tap hole closing material according to the present invention (Claim 1) is the inside of a separable mold having one cylindrical mold and the other cylindrical mold. In the state where the space formed in the blast furnace (hole filling hole for blast furnace discharge hole closing material) is filled with the blast furnace discharge hole closing material and one cylindrical mold is fixed, the other cylindrical mold is From the obtained shear load data, the blast furnace exit hole plugging material in the mold is sheared and fractured by moving it in the orthogonal direction, and the shear load when the blast furnace discharge hole plugging material in the mold breaks is sheared. Since the deformation characteristics of the blast furnace outlet hole closing material are evaluated, the deformation of the blast furnace outlet hole closing material, which is a plastic deformation material, cannot be avoided in the aforementioned Marshall test. Therefore, it is possible to evaluate accurately without being affected by the slip resistance.

Further, as in the deformation characteristic evaluation method of the blast furnace tap hole closing material according to claim 2, by making it possible to measure the shear load under a predetermined controlled temperature condition, It becomes possible to evaluate the deformation characteristics at a high temperature (for example, 100 to 300 ° C.), and it is possible to more reliably evaluate the deformation performance of the blast furnace tap hole closing material.
As a method for enabling the measurement of the shear load under a predetermined controlled temperature condition, there is a method for measuring the shear load in a thermostatic device having a temperature control function, Examples include a method of measuring the shear load while attaching a controllable heater and controlling the temperature of the internal blast furnace tap hole closing material.

Further, as in the method for evaluating deformation characteristics of the blast furnace tap hole closing material according to claim 3, when it is possible to continuously measure the amount of displacement of the mold and the shear load at the time of shearing, with higher accuracy. It becomes possible to evaluate the deformation performance of the blast furnace exit hole closing material, and the present invention can be further effectively demonstrated.
In addition, as a method of continuously measuring the amount of displacement and shear load of the mold when the blast furnace tap hole closing material is sheared, for example, continuously measuring the amount of displacement of the mold using a linear gauge, For example, a method of continuously measuring the shear load using a load cell is exemplified, but there is no particular restriction on a specific method for continuously measuring the displacement and the shear load.

  Further, in the deformation characteristic evaluation device for a blast furnace tap hole closing material according to the present invention (Claim 4), the surfaces orthogonal to the axial direction are the contact surfaces of each other, and the contact surfaces are in contact with each other. A separable mold having one cylindrical mold and the other cylindrical mold, in which a filling space for the blast furnace exit hole closing material is formed, and fixing the one cylindrical mold and the other cylinder Mold drive means for moving the shape mold in the direction perpendicular to the axial direction to shear fracture the blast furnace outlet blocker in the mold, and the shear load when the blast furnace outlet blocker in the mold shears and breaks Therefore, the method for evaluating the deformation characteristics of the blast furnace tap hole closing material according to claim 1 of the present application is surely implemented to accurately determine the deformation characteristics of the blast furnace tap hole closing material. It becomes possible to evaluate.

Further, as in the apparatus for evaluating deformation characteristics of a blast furnace tap hole closing material according to claim 5, a heating means capable of controlling the temperature of the blast furnace tap hole closing material at the time of measuring a shear load to a predetermined temperature is provided. With this configuration, it becomes possible to evaluate the deformation characteristics at a high temperature of 100 ° C. or higher (for example, 100 to 300 ° C.), and to more reliably evaluate the deformation performance of the blast furnace tap hole closing material. It becomes possible.
In addition, as a heating means for enabling the measurement of the shear load under a predetermined controlled temperature condition, a thermostatic device having a temperature control function or a temperature attached to a mold is used. Examples include controllable heaters.

  Further, as in the deformation characteristic evaluation device for blast furnace tap hole closing material according to claim 6, the displacement amount measuring means for continuously measuring the displacement amount of the mold during shearing, and the shear load during shearing are continuously measured. By adopting a configuration including the shear load measuring means to perform, it becomes possible to evaluate the deformation performance of the blast furnace tap hole closing material with higher accuracy, and the present invention can be further effectively demonstrated.

  The displacement measuring means for continuously measuring the amount of displacement of the mold when the blast furnace tap hole closing material is sheared includes, for example, a linear gauge, etc. Examples of the shear load measuring means for continuously measuring the shear load when the material is sheared include a load cell. However, the means for continuously measuring the displacement amount and the shear load are exemplified. There are no restrictions and various measuring means can be used.

  Embodiments of the present invention will be described below, and the features of the present invention will be described in detail.

An embodiment (specific configuration) of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the principle of a deformation characteristic evaluation method (apparatus) for a blast furnace tap hole closing material according to the present invention.
In the method for evaluating deformation characteristics of a blast furnace tap hole closing material according to the present invention, a blast furnace tap hole closing material (sample) 1 as a sample is divided into a fixed mold 2 as one cylindrical mold and a cylindrical mold as the other. The mold 10 that can be divided into the movable mold 3 is filled in a heating means (constant temperature device) 4 capable of temperature control.

  Then, heating is started, and after reaching a predetermined temperature, a load is applied to the movable mold 3 to shear the blast furnace exit hole closing material (sample) 1 together with the mold 10.

  The load when the blast furnace tap hole closing material (sample) 1 is sheared is continuously measured by the load cell 5, and the displacement amount of the movable die 3 is continuously measured by the linear gauge 6. Are output and recorded, the deformation behavior when the blast furnace outlet hole closing material (sample) 1 is sheared is continuously examined in detail.

  Furthermore, a so-called “load-unloading method” in which a predetermined load is applied to the blast furnace outlet hole closing material (sample) 1, the load is released, and then the load is applied again to measure the displacement behavior. By carrying out the above, it becomes possible to precisely analyze the elasto-plastic behavior of the blast furnace tap hole closing material (sample) 1.

  In addition, by making it possible to set a plurality of blast furnace outlet hole closing materials (samples) in one apparatus, it becomes possible to evaluate a plurality of samples at once.

  Thus, in the present invention, a blast furnace outlet hole closing material is filled in a separable mold 10 having a fixed mold 2 which is one cylindrical mold and a movable mold 3 which is the other cylindrical mold. However, by moving the movable die 3 in the direction perpendicular to the axial direction, the blast furnace exit hole closing material in the die is sheared to evaluate the deformation behavior, so avoid the marshalling test described above. It is possible to evaluate the characteristics of the blast furnace tap hole closing material itself without being affected by slip resistance with the mold wall.

  In addition, since the blast furnace tap hole closing material 1 itself is restrained in the mold 10, deformation due to its own weight does not occur. After the sample is filled in such a separable mold 10 at room temperature, it is inserted into a heating means (constant temperature device) 4 capable of controlling the temperature, and the temperature of the blast furnace exit hole closing material 1 reaches a predetermined temperature. Then, by performing a test, it becomes possible to carry out measurement at a high temperature of 100 ° C. or higher.

  Note that the temperature control method is not limited to the method using the thermostatic device 4, and a temperature controllable heater is attached to the mold to control the temperature of the internal blast furnace tap hole closing material. Is possible.

  In the apparatus for evaluating deformation characteristics of a blast furnace outlet blocker according to the present invention, the test temperature is adjusted according to the purpose of the evaluation, but the temperature at which the binder has the lowest viscosity, for example, coal tar pitch is used as the binder. In the case of the used blast furnace tap hole closing material, it is preferable to be in the range of 200 to 300 ° C. Moreover, if it uses a phenol resin as a binder, it is preferable to set it as the range of 80-150 degreeC.

  Furthermore, if the size of the mold used in the deformation characteristics evaluation device for the blast furnace tap hole closure material of the present invention is increased, the value of the load and displacement to be measured increases and the measurement accuracy is improved, but the size of the device is increased. In addition, there is a negative effect that handling during measurement becomes difficult. Therefore, in practice, it is preferable to use one having an inner diameter of about 30 mm to 200 mm.

Further, it is desirable that the shape of the mold is a square cylindrical shape because there is no area change during fracture and high-accuracy data can be obtained.
On the other hand, if the shape of the mold is a cylindrical shape, the creation of the device is simpler.
As described above, the shape and dimensions of the mold can be selected depending on the purpose, and are not particularly limited.

  In addition, according to the method for evaluating deformation characteristics of a blast furnace tap hole closing material of the present invention, after filling a sample into a mold that can be divided at room temperature, the gantry is moved up and down as in the conventional method. There is no need, and it becomes possible to automate and continuously measure (make it possible to measure the shear load of a plurality of samples one after another) relatively easily.

An example of an apparatus for evaluating deformation characteristics of a blast furnace tap hole closing material when automated and continuous is shown in FIG. In FIG. 2, the parts denoted by the same reference numerals as those in FIG. 1 indicate the same or corresponding parts.
As shown in FIG. 2, this apparatus for evaluating the deformation characteristics of a blast furnace tap hole closing material includes a plurality of separable molds 10 on which a blast furnace tap hole closing material (sample) is set, a tunnel type constant temperature which is a heating means. Continuously supplied into the apparatus 14, a load is applied to the movable mold 3 to shear the blast furnace exit hole closing material (sample) inside the mold 10, and the shear load is measured by the load cell 5. By outputting data, the shear load is automatically measured and continuously measured.

  By using this apparatus for evaluating deformation characteristics of a blast furnace tap hole closing material, the deformation behavior of the blast furnace tap hole closing material can be efficiently investigated, and the deformation characteristics can be evaluated with high accuracy.

  The features of the present invention will be described in more detail below with reference to examples of the present invention.

  FIG. 3 is a view showing a configuration of a main part of an apparatus used for carrying out the deformation characteristic evaluation method for a blast furnace tap hole closing material according to the present invention. In FIG. 3, the parts denoted by the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts.

  In this blast furnace tap hole closing material deformation characteristic evaluation apparatus, the surfaces perpendicular to the axial direction are the contact surfaces of each other, and the contact surface is in contact with the blast furnace tap hole closing material 1 inside. A separable mold 10 having one cylindrical mold (fixed mold) 2 and the other cylindrical mold (movable mold) 3 in which a filling space is formed is used.

  Further, a mold driving means for shearing and breaking the blast furnace exit hole closing material 1 in the mold 10 by moving the movable mold 3 in a direction (direction of arrow A) orthogonal to the axial direction with the fixed mold 2 fixed. 15, a mechanism configured to shear the blast furnace outlet hole closing material 1 by pulling the movable mold 3 through the spring 16 by the drive unit 17 is used, and the blast furnace in the mold 10 is used. The shear load when the spigot hole closing material 1 is sheared and broken is measured by the spring 16 alone.

  In addition, the measurement of the shear load is performed in a heating means (in this embodiment, an electric furnace) 24 having a temperature control function, and the temperature of the blast furnace tap hole closing material 1 is the thermocouple 25. It is comprised so that it may be measured by.

In this embodiment, four cylindrical molds 10 having a diameter (inner diameter) of 70 mm were prepared.
And the blast furnace exit hole obstruction | occlusion material 1 was heated at 60 degreeC, and the type | mold 10 was filled in normal temperature atmosphere.

  This is arranged in a heating means (in this embodiment, an electric furnace) 24 having a temperature control function, and the set thermocouple 25 confirms that the blast furnace tap hole closing material 1 inside the mold 10 has reached the target temperature. After confirming, the movable die 3 was pulled only from the outside of the furnace through the spring 16 capable of holding the maximum value, and the blast furnace outlet hole closing material 1 was sheared and measured, and the maximum load was measured.

In FIG. 4, when the blast furnace exit hole closing material 1 (sample A) is kneaded while changing the tar amount as a binder, the tar amount, the Marshall value at 70 ° C. (the value of the extrusion load in the Marshall test), and The relationship of shear load is shown.
As shown in FIG. 4, it was confirmed that the Marshall value and the shear load change with the same tendency with respect to the tar amount.

Further, FIG. 5 shows a Marshall value at 70 ° C. when kneaded with varying amounts of tar for each of three samples (blast furnace outlet hole closing materials) A, B, and C having different material designs (compositions). And the relationship between the shear load at 70 ° C.
In FIG. 5, in each of samples A, B, and C, a sample with a small Marshall value and shear load indicates that the amount of added tar is large, and a sample with a large Marshall value and shear load indicates the amount of tar added. Indicates less.
As can be seen from FIG. 4 described above, both the Marshall value and the shear load are reduced by increasing the amount of tar. Therefore, the shear load-marshall value plot is a curve having a positive slope. Here, if a general relationship is established between the Marshall value and the shear load, all are plotted on the same curve.
However, as shown in FIG. 5, when the Marshall value at 70 ° C. and the shear load at 70 ° C. are plotted, the sample B has the largest inclination and the sample C has the smallest inclination. This is considered to reflect the difference in material design (composition). By the evaluation according to the present invention, it is possible to detect a difference in characteristics that could not be detected by the conventional marshall test.

A major feature of the present invention is that evaluation at high temperatures is possible. The results of evaluating this are shown below.
FIG. 6 shows the relationship between the shear load at 70 ° C. and the shear load at 200 ° C., and FIG. 7 shows the relationship between the shear load at 70 ° C. and the shear load at 300 ° C. As the samples, the samples A, B, and C described above were kneaded with different tar amounts and separately used.
As a result, it was found that Sample C had a higher shear load at higher temperatures than Samples A and B. As described above, in the actual filling of the tap hole, the deformation characteristics at about 300 ° C. at which the viscosity of tar becomes the smallest greatly affects the filling behavior of the tap hole. By measuring, it is possible to predict the filling behavior into the actual ostia with higher accuracy than in the case of the Marshall test performed at a relatively low temperature.

  In addition, although the measurement example of only the maximum load was shown in this embodiment, in addition to this, by accurately measuring the load and displacement, and performing various measurements, it is possible to return to the actual tap hole of the blast furnace tap hole closing material. It is clear that the filling behavior of can be examined in detail.

  Furthermore, various tests on a large number of samples are continuously performed by heating the sample in, for example, a tunnel type furnace and performing continuous measurement by automating the supply of the mold in which the sample is set and shear fracture. Can do. This automation and continuation is easier than the automation and continuation of the marshall test, has sufficient practicality, and contributes to reducing the test load and increasing the test quantity of the blast furnace exit hole blocking material. be able to.

  In addition, this invention is not limited to the said embodiment and Example, A various application and deformation | transformation can be added within the scope of the invention.

According to the present invention, the deformation characteristics of the plastic blast furnace tap hole closing material, which is a plastic material, can be accurately evaluated without being affected by slip resistance with the mold wall, which cannot be avoided in the conventional Marshall test. be able to.
In addition, according to the present invention, measurement at a high temperature of 100 ° C. or higher is possible, and deformation of the blast furnace outlet hole closing material is measured by continuously measuring the amount of mold displacement and shear load during shearing. Properties can be evaluated in more detail.
Furthermore, since the present invention simplifies the measurement principle itself, characterization (test) can be continued and automated.

  Therefore, this invention can be widely applied to the field | area which needs to evaluate the deformation | transformation characteristic of a blast furnace tap hole obstruction | occlusion material.

It is a figure which shows the principle of the deformation | transformation characteristic evaluation method (apparatus) of the blast furnace tap hole obstruction | occlusion material of this invention. It is a figure which shows the example of the deformation | transformation characteristic evaluation apparatus of the blast furnace tap hole obstruction | occlusion material at the time of automation and continuation. It is a figure which shows the principal part structure of the apparatus used in order to implement the deformation | transformation characteristic evaluation method of the blast furnace tap hole obstruction | occlusion material of this invention. It is a figure which shows the relationship between the amount of tar, the Marshall value at 70 ° C. (the value of the extrusion load in the Marshall test), and the shear load when kneading the blast furnace exit hole closing material while changing the amount of tar as a binder . It is a figure which shows the relationship between the Marshall value in 70 degreeC, and a shear load about the blast furnace tap hole obstruction | occlusion material kneaded by changing tar amount. It is a figure which shows the relationship between the shear load in 70 degreeC, and the shear load of 200 degreeC. It is a figure which shows the relationship between the shear load in 70 degreeC, and the shear load of 300 degreeC. It is a figure for demonstrating the Marshall test as a method of evaluating the filling performance of a blast furnace tap hole obstruction | occlusion material.

Explanation of symbols

1 Blast furnace outlet blockage material (sample)
2 fixed type 3 mobile type 4 heating means (constant temperature device)
5 Load Cell 6 Linear Gauge 7 Recorder 10 Dividable Type 11 Computer 14 Tunnel Type Thermostatic Device 15 Type Drive Unit 16 Spring Only 17 Drive Unit 24 Heating Unit (Electric Furnace in this Example)
25 Thermocouple

Claims (6)

(a) Surfaces orthogonal to the axial direction become contact surfaces of each other, and in a state where the contact surfaces are in contact with each other, a space filled with a blast furnace discharge hole closing material is formed inside, Filling the separable mold with the mold and the other cylindrical mold with a blast furnace outlet hole closing material;
(b) One cylindrical mold is fixed, and the other cylindrical mold is moved in a direction perpendicular to the axial direction to shear break the blast furnace exit hole closing material in the mold, A step of measuring the shear load when the fistula blocking material breaks in shear;
and (c) determining a deformation characteristic of the blast furnace tap hole closing material from the shear load.   2. The method for evaluating deformation characteristics of a blast furnace tap hole closing material according to claim 1, wherein the measurement of the shear load in (b) is performed under a predetermined controlled temperature condition.   3. The method for evaluating deformation characteristics of a blast furnace tap hole closing material according to claim 1 or 2, wherein the amount of displacement of the mold and the shear load during the shearing of (b) are continuously measured. The cylindrical mold and the other, in which the surfaces perpendicular to the axial direction become mutual contact surfaces and in which the contact surfaces are in contact with each other, a filling space for the blast furnace discharge hole closing material is formed inside A separable mold with a cylindrical mold of
Mold driving means for fixing one cylindrical mold and moving the other cylindrical mold in a direction perpendicular to the axial direction to shear break the blast furnace outlet hole closing material in the mold;
Shear load measuring means for measuring a shear load when the blast furnace exit hole plugging material in the mold undergoes shear fracture.   5. The blast furnace outlet according to claim 4, further comprising a heating unit configured to control a temperature of the blast furnace outlet blocker when the shear load is measured to a predetermined temperature. Deformation characteristic evaluation device for hole closing material.   The displacement amount measuring means for continuously measuring the displacement amount of the mold during the shearing and the shear load measuring means for continuously measuring the shear load during the shearing are provided, or 5. An apparatus for evaluating deformation characteristics of a blast furnace tap hole closing material according to 5.

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