TWI620924B - Shell container for complex probe and complex probe - Google Patents

Abstract

The invention discloses a shell container for a composite probe. The shell container is immersed in the molten metal to allow the molten metal to be introduced therein. The shell container includes: an inflow hole defined in a side surface of the shell container to allow the molten metal to be introduced thereinto; A chamber and a collection chamber, wherein the molten metal is introduced thereinto through the inflow hole to fill it; a steel receiving flow channel that connects the inflow hole to the steel receiving chamber; and a collection flow channel that An inflow hole is connected to the collection chamber. The molten metal probe further includes a first temperature sensor including a temperature measurement portion placed in the steel receiving chamber, and an uneven pattern is formed on an inner surface of the steel receiving chamber.

Description

Housing container for composite probe and composite probe

The present invention relates to a housing container and a composite probe for a composite probe, and more particularly, to a housing container and a composite probe for a composite probe immersed in a molten metal to measure the temperature of the molten metal or the solidification temperature.

The composite probe has been immersed in the molten steel, such as a converter (for example, a sub-blowing tube) using a lifting device, and then taken out to analyze the composition of the molten steel.

A probe body contains an inflow hole defined in its side surface, allowing molten steel to be introduced therein. The molten steel that has been introduced into the probe body will solidify when the molten steel fills the steel receiving chamber. A temperature sensor is placed in the steel receiving chamber to measure the solidification temperature of the molten steel. The temperature measurement part of the temperature sensor is placed towards a part, that is, the last solidified part of the molten steel when the molten steel gradually solidifies from the edge of the molten steel, so as to provide the solidification temperature data to evaluate the carbon content in the molten steel. In addition, solidified molten steel is provided as a sample for instrumental analysis, such as emission spectrochemical analysis or combustion chemical analysis.

Recently in converter operation, a variety of blowing modes have been adopted to process many types of steel, and high-quality iron ore must be gradually depleted and low-cost raw materials are increasingly used. The hot metal ratio (HMR) usually varies with the supply and demand of scrap steel. Fluctuations. In addition, because the blowing technology will reduce the smelting cycle (T-T) time, cost and facility efficiency It becomes complicated, so probes for measuring time and environment are diversified.

The invention provides a housing for a composite probe and a composite probe, which can accurately measure the solidification temperature of a molten metal.

The present invention also provides a housing for a composite probe and a composite probe, which can increase the cooling rate of the molten metal and shorten the solidification time of the molten metal.

The present invention also provides a housing container for a composite probe and a composite probe, which allows a molten metal to be smoothly introduced thereinto.

A specific embodiment of the present invention provides a housing container for a composite probe, which is immersed in molten metal to allow the molten metal to be introduced therein. The housing includes: an inflow hole defined in a side surface of the housing container to The molten metal is allowed to be introduced therein; a steel receiving chamber and a collecting chamber, wherein the molten metal is introduced thereinto through the inflow hole and filled therein; a steel receiving flow channel that connects the inflow hole to the steel receiving chamber And a collecting flow channel connecting the inflow hole to the collecting chamber, wherein the molten metal probe further includes a first temperature sensor including a temperature measuring portion located in the steel receiving chamber, and An uneven pattern is formed on the inner surface of the steel receiving chamber.

In some specific embodiments, the steel receiving cavity may have a rectangular parallelepiped shape, and the pattern may be formed on a longitudinal short surface defined by an inner surface of the steel receiving cavity along a longitudinal direction, the longitudinal short surface being away from the steel The central part of the receiving chamber.

In other specific embodiments, the steel receiving chamber may have a volume ratio in which the volume divided by the surface area is from about 4 to about 4.5.

In still other specific embodiments, the collection chamber may be along the It is placed in the longitudinal direction, and the collecting flow path may have a corner portion having a shape of an arc.

Even in other specific embodiments, the steel receiving runner may be inclined from the inflow hole in a direction away from the first temperature sensor, and an inclination between the cross section of the housing container and the steel receiving runner The angle is between approximately 20 ° and 60 °.

In still other specific embodiments, the inflow hole may include: a steel receiving sprue configured to communicate with the steel receiving chamber; and a collection injection port configured to communicate with the collection chamber Communication, wherein the steel receiving injection port and the collecting injection port may be separated from each other.

In a further specific embodiment, the steel receiving injection port may have a diameter of about 20 mm to about 25 mm.

In still further embodiments, the molten metal probe may further include a second temperature sensor located at a front end of the housing container to measure the temperature of the molten metal.

In even further specific embodiments, the collection chamber and the steel receiving chamber can be placed along a longitudinal and lateral direction of the housing container without overlapping each other.

In a further specific embodiment, the molten metal probe may further include a second temperature sensor located at a front end of the housing container to measure the temperature of the molten metal, and the injection port may be defined at a distance The front end of the shell container is about 200 mm toward the longitudinal direction of the shell container.

In other specific embodiments of the present invention, a composite probe includes: a main branch tube configured to allow the molten metal to pass through a defined side portion of the tube in a state where the main branch tube has been immersed in the molten metal. An opening introduces the composite probe; an outer branch tube is located on the outer part of the main branch tube to close the opening; a shell container is built in the main branch tube Inside; first and second temperature sensors on the housing container; and a connector electrically connected to each of the first and second temperature sensors, wherein the housing container Including: an inflow hole defined in the side surface of the shell container to communicate with the opening to allow the molten metal to be introduced therein; a steel receiving chamber and a collection chamber, wherein the molten metal is introduced through the inflow hole It is filled with it; a steel receiving runner that connects the inflow hole to the steel receiving chamber; and a collection runner that connects the inflow hole to the collection chamber, wherein the first temperature sensor A temperature measuring portion of the steel receiving chamber is located in the steel receiving chamber, and the second temperature sensor is located on a front end of the housing container, and an uneven pattern is formed on an inner wall of the steel receiving chamber.

1‧‧‧ probe body

2‧‧‧main branch pipe

3a‧‧‧Steel receiving inlet / inlet / opening

3b‧‧‧ collection inlet / inlet / opening

4‧‧‧ Outer branch pipe

9‧‧‧steel receiving runner

9r‧‧‧ Corner section

10‧‧‧steel receiving chamber

10a‧‧‧Wave pattern (circular protrusion)

11‧‧‧ collection runner

14‧‧‧First installation space

17‧‧‧Auxiliary branch pipe

18‧‧‧ collection chamber

20‧‧‧accommodation space

22‧‧‧The first temperature sensor

22a‧‧‧Body

22b‧‧‧Temperature measuring tube

22c‧‧‧Temperature measurement section

23‧‧‧ collection container

23a‧‧‧ metal container body

24‧‧‧Second Temperature Sensor

24a‧‧‧Body

24b‧‧‧Temperature measuring tube

24c‧‧‧metal cover

26‧‧‧ Guide tube

33a‧‧‧ opening

33b‧‧‧ opening

107‧‧‧shell container

107a‧‧‧ split block

107b‧‧‧ split block

A‧‧‧Deoxidizer

C‧‧‧ connector

f1, f2, f3‧‧‧side surface

h‧‧‧ holder

p2‧‧‧wave pattern

p3‧‧‧ sunken pattern

S1, S2, S3 ‧‧‧ samples

The accompanying drawings are included to further understand the present invention, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention, and can be used to explain the principles of the present invention after the description of the contents. In the drawings: the first diagram is a cross-sectional view of a molten metal probe according to a specific embodiment of the present invention; the second diagram is an exploded perspective view of the molten metal probe in the first diagram; the third diagram is a first diagram cut away A perspective view of a part of the molten metal probe in the fourth figure; the fourth figure is a diagram illustrating a comparative example of a shell container in the first figure; the fifth figure is a sample illustrating the solidification of the sample in the shell container in the fourth figure The sixth diagram is a diagram illustrating the first specific embodiment of the shell container in the first diagram; the seventh diagram is a diagram illustrating the solidification of the shell in the shell container in the sixth diagram; the eighth The figure illustrates a second specific embodiment of the shell container in the first figure The ninth figure is an example of the solidification of the sample in the shell container in the eighth figure; the tenth and eleventh figures are comparisons showing the temperature of the molten metal measured through the first temperature sensor Result graphs; graphs twelve and thirteen are graphs showing the carbon content in the molten metal as assessed by composition analysis and solidification temperature; and graphs fourteen and fifteen are graphs showing Inlet diameter drawing of the same state.

Hereinafter, other objects and methods of implementation of the present invention will be explained through the following specific embodiments described with reference to the drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the first to fifteenth drawings. However, the present invention may be embodied in different forms and is not limited to the specific embodiments disclosed herein. Rather, these specific embodiments are provided so that the scope of the disclosure is more complete and the scope of the invention will be fully conveyed to those skilled in the art. Thus, in the drawings, the dimensions of layers and regions are exaggerated for clarity.

The first figure is a cross-sectional view of a molten metal probe according to a specific embodiment of the present invention; and the second figure is an exploded perspective view of the molten metal probe in the first figure. The third figure is a perspective view cut through a portion of the molten metal probe in the first figure.

As illustrated in the first to third figures, a probe body 1 includes a main branch pipe 2. The main branch pipe 2 allows molten metal, such as molten steel, to be introduced into the probe body 1 through openings 33 a and 33 b defined in the side portions of the main branch pipe 2. An outer branch pipe 4 is located on the outer part of the main branch pipe 2 To close the openings 33a and 33b. The probe body 1 is fixed on a holder h, which is connected to a lifting device, such as a sub lance, and immersed in the molten metal, such as molten steel in a converter, and then withdrawn . During immersion, the outer branch pipe 4 passes through a slag layer, and when the outer branch pipe 4 reaches a molten metal bath, the outer branch pipe 4 disappears. Here, the openings 33 a and 33 b are opened to allow the molten metal to be introduced into the probe body 1. A connector C allows the probe body 1, particularly the first and second temperature sensors 22 and 24 to be described later, to be electrically and mechanically connected to the holder h.

A shell container 107 is built in the main branch pipe 2. In the shell container 107, a steel receiving injection port 3a opened toward the opening 33a, a steel receiving flow path 9 extending from the steel receiving injection port 3a toward the direction opposite to the opening 33a, and The direction is switched to a steel receiving chamber 10 extending toward a front end. In addition, in the housing container 107, one collection injection port 3b which is opened toward the opening 33b, and one collection flow path 11 which extends from the collection injection port 3b in a direction opposite to the opening 33b, and is switched from the direction of the collection flow path 11 A collection chamber 18 is one extending towards the front end.

In this specification, both the steel receiving chamber 10 and the collecting chamber 18 can be placed along a longitudinal direction of the housing container 107 without overlapping each other. When compared with the steel receiving chamber 10, the collection chamber 18 is adjacent to the front end of the housing container 107. Similarly, when compared with the steel receiving injection port 3a and the steel receiving flow path 9, the collecting injection port 3b and the collecting flow path 11 are adjacent to the front end of the housing container. In addition, both the steel receiving chamber 10 and the collecting chamber 18 can be placed along a lateral direction of the housing container 107 without overlapping each other. When compared with the steel receiving chamber 10, the collection chamber 18 is adjacent to the side surface of the probe body in which the inflow holes 3a and 3b are defined.

In addition, a first installation space 14 is defined under the steel receiving chamber 10 (see First picture). A body portion 22 a (to be described later) of the first temperature sensor 22 is located in the first installation space 14. An accommodating space 20 is parallel to the collection chamber 18, and the opening faces the front end of the housing container 107. A body portion 24 a of the second temperature sensor 24 is accommodated in the accommodation space 20.

As exemplified in the second figure, the shell container 107 may include divided blocks 107a and 107b, which are partitioned along the reference surface. The divided blocks 107a and 107b may be symmetrical with respect to the reference surface, that is, the reference surface is along the longitudinal direction of the shell container 107, and divides the steel receiving chamber 10, the collecting chamber 18, the steel receiving channel 9 and the collecting Runner 11. As illustrated in the second figure, because each of the divided steel receiving chamber 10, collection chamber 18, steel receiving runner 9 and collecting runner 11 is the steel receiving chamber 10, the collecting chamber 18 Half of each of the steel receiving runner 9 and the collecting runner 11, while the steel receiving chamber 10, the collecting chamber 18, the steel receiving runner 9 and the collecting runner 11 are within the divided blocks 107a and 107b. Each of them is represented by a newly added reference symbol H. The divided blocks 107a and 107b are inserted into an auxiliary branch pipe 17. The first and second temperature sensors 22 and 24 and a collection container 23 are assembled with the housing container 107 to form a probe body 1 of a molten metal probe.

In the first temperature sensor 22, a U-shaped temperature measuring tube 22b extends from the body portion 22a, and a thermocouple is located in the temperature measuring tube 22b. A temperature measurement portion 22c is located on the front end of the temperature measurement tube 22b, so that the body portion 22a is located in the first installation space 14 in a state where the temperature measurement portion 22c has been inserted into the correct position of the steel receiving chamber 10. In this specification, a wire connected to the body portion 22a is connected to the connector C.

The collecting container 23 is a flat container for collecting a dish-shaped solidified sample from the molten metal. The collection container 23 includes a metal container body 23a and a guide tube 26. The guide tube 26 may be formed of a quartz material. The metal container body 23 a is contained in the collection chamber 18.

In the second temperature sensor 24, a temperature measurement formed by a U-shaped quartz tube The tube 24b extends from the body portion 24a, and a thermocouple is located in the temperature measuring tube 24b. A metal cover 24c covers the temperature measuring tube 24b. The body portion 24a is inserted into the accommodation space 20, the metal cover 24c protrudes from the front end of the case container 107, and a wire connected to the body portion 24a is connected to the connector C.

The steel receiving chamber 10 is filled with a deoxidizing agent A. When the probe body 1 is lowered toward the molten metal with the lifting device, such as a sub-blow pipe, the probe body 1 passes through the slag layer and is immersed in the molten metal bath. In this way, the metal cover 24c of the second temperature sensor 24 disappears to measure the temperature of the molten metal. In addition, when the outer branch pipe 4 disappears and the openings 3 a and 3 b are opened, the molten metal is introduced into the probe body 1 to move toward the steel receiving chamber 10 and the collecting chamber 18.

The molten metal introduced into the steel receiving chamber 10 can be effectively deoxidized by the deoxidizing agent A charged into the steel receiving chamber 10. This molten metal solidifies immediately after filling in the steel receiving chamber 10 and gradually solidifies. The temperature measurement portion 22c of the first temperature sensor 22 is located almost at the center portion of the steel receiving chamber 10, that is, at a position having excellent thermal balance, to measure the temperature of the molten metal to stabilize the flat portion of the temperature value .

When the molten metal is introduced into the steel receiving chamber 10, the difference between the introduction temperature of the molten metal and the solidification temperature of the molten metal when the molten metal is solidified is used to generate a peak (or degree of overheating). In this specification, since a latent heat of solidification may be generated, a solidified temperature flat portion on which the solidified temperature is stable is maintained for a predetermined time. There is some carbon in the molten metal, and thus the molten metal can be evaluated through the solidification temperature data and the flat part of the solidification temperature at which the solidification temperature of the molten metal maintains a constant value. The flatness of the solidification temperature can be affected by the stability and time of the latent heat release of the molten metal. Therefore, the stability and time can be based on the temperature and composition of the molten metal and the state and material of the steel receiving chamber 10 And change.

In the case of the existing molten metal probe, because the molten metal is cooled unevenly, a local phase transition occurs within the steel receiving chamber 10, the flat portion of the solidification temperature may be inclined, or the start time of solidification may Delay, so it is impossible to accurately detect the solidification temperature of the molten metal.

In particular, in the later part of the blowing operation, such as quick direct tapping (QDT), due to the high molten steel temperature, molten steel with a degree of overheating is introduced, so that a flat portion of the solidification temperature is generated after this delay . In this way, it is difficult to accurately evaluate the carbon content within the measurement time, or the cooling of the molten steel is uneven due to the delay of the solidification time, so that the flat part of the solidification temperature can be gently generated. That is, when the degree of overheating of the molten metal is too high, the temperature of the molten metal gradually decreases, so that the flat portion of the solidification temperature is not generated. In this way, a control unit determines the error temperature before the start of solidification as a solidification temperature through calculation logic. In this case, the estimated value of carbon is not high, leading to measurement errors or measurement accuracy degradation. In this way, it is necessary to shorten the solidification time of the molten metal.

When the molten metal is introduced into the steel receiving chamber 10, the introduced molten metal emits thermal energy to the outside by conduction, convection, and radiation. This is expressed by Chvorinov's law as follows.

t _ʃ = c (volume ( V _c ) / surface area ( A _c )) ² ( t _ʃ = freezing temperature, V _c = volume, A _c = surface area and c = constant)

According to the above equation, the ideal shape of the steel receiving chamber 10 that can shorten the solidification time is a polygonal column shape, such as a rectangular column shape rather than a circular shape. When the temperature measurement portion 22c is located in the central portion of the steel receiving chamber 10, the shape of a regular hexahedron or a cylinder is sufficient to ensure the surface area, instead of a rectangular parallelepiped shape, so that it can easily nucleate uniformly.

However, the shape of the steel receiving chamber 10 may be limited due to the internal space limitation of the shell container 107. In addition, because the volume of the steel receiving chamber 10 must be higher than a predetermined size to ensure a flat part of the solidification temperature, the rectangular steel receiving chamber 10 can be designed optimally.

According to the above equation, because the solidification time is proportional to the square of the volume ratio (modulus = volume / surface area), the volume ratio must be reduced to shorten the solidification time. Therefore, it is necessary to increase the surface area of the steel receiving chamber. In particular, a wavy or embossed pattern is processed on the longitudinal short surface away from the temperature measuring portion 22c of the temperature sensor 22a of the steel receiving chamber to accelerate the release of heat, thereby shortening the solidification time. Because the steel receiving chamber 10 has a rectangular parallelepiped shape, the steel receiving chamber 10 has a longitudinal short surface and a longitudinal long surface defined along its longitudinal direction, and is adjacent to the steel receiving runner 9 and the first installation space 14 s surface. The molten metal filled in the steel receiving chamber 10 can release heat through the longitudinal short surface and the longitudinal long surface, and thus solidify. In this specification, because the temperature measurement portion 22c of the first temperature sensor 22 is located in the central portion of the steel receiving chamber 10, and the surface area of the longitudinal short surface is smaller than that of the longitudinal long surface, and is longer than the longitudinal length When the surface is compared, the central portion far from the steel receiving chamber 10 is delayed when compared with the longitudinal long surface, the heat released by the molten metal through the longitudinal short surface. As such, the surface area must be increased by patterning. In addition, the volume of the steel receiving chamber 10 is reduced, reducing the size of the solidified sample by about 20% or more.

The fourth diagram is a diagram illustrating a comparative example of a shell container in the first diagram, and the fifth diagram is a diagram illustrating a sample solidified in the shell container in the fourth diagram. The sixth diagram is a diagram illustrating a first specific embodiment of the shell container in the first diagram, and the seventh diagram is a diagram illustrating a sample solidified in the shell container in the sixth diagram. The eighth figure is an illustration of the shell container in the first figure The second specific embodiment is a drawing, and the ninth drawing is a drawing illustrating a sample solidified in the shell container in the eighth drawing.

The sample S1 illustrated in the fifth figure has a shape substantially consistent with the shape of the steel receiving chamber 10 in the fourth figure. Both side surfaces f1 and f1 correspond to inner surfaces on both sides of a reference surface facing each other. The sample S2 illustrated in the seventh figure has a shape substantially identical to that of the steel receiving chamber 10 in the sixth figure. Both side surfaces f2 and f2 correspond to inner surfaces on both sides of a reference surface facing each other. That is, because the steel receiving chamber 10 of the sixth figure has an uneven wave pattern 10a on its inner surface, the sample S2 has an uneven wave pattern p2. The sample S3 illustrated in the ninth figure has a shape substantially consistent with the shape of the steel receiving chamber 10 in the eighth figure. Both side surfaces f3 and f3 correspond to inner surfaces on both sides of a reference surface facing each other. That is, because the steel receiving chamber 10 of the eighth figure has a circular protrusion 10a on its inner surface, the sample S3 has a circular depression pattern p3.

The steel receiving chambers of the fourth to ninth figures are summarized in Table 1 below.

Please refer to Table 1 above. When the modulus is 4 to 4.5, the waveform stability and component evaluation accuracy are very good. When the modulus is less than 4.0, it can be found that rapid cooling can be performed within this range, and it is difficult to secure the flat portion of the solidification temperature. When the modulus is higher than 4.5, it can be found that Late cooling results in a local phase equilibrium situation, which reduces the reliability of the measured values.

Although the uneven wave pattern and the uneven depression pattern have been exemplified in the sixth and eighth figures, the specific embodiments of the present invention are not limited to such uneven patterns. For example, the wavy pattern and the recessed pattern can be combined with each other to form uneven shapes in other shapes.

The tenth graph and the eleventh graph are graphs showing the comparison result of the temperature of the molten metal measured by the first temperature sensor. The green line of each of the tenth and eleventh figures represents the temperature of the molten metal. When the molten metal has been introduced into the steel receiving chamber 10, the molten metal is measured through the first temperature sensor 22 therein. A wave form of the solid state begins to solidify in a state where the molten metal has a high temperature, and then the phase average is established to represent the solidification temperature. In the comparative example of the tenth figure, the solidification temperature is inclined because a local phase equilibrium occurs. However, in the specific embodiment 2 of the eleventh figure, the solidification temperature of the measured waveform in a relatively horizontal state is shown.

The twelfth and thirteenth graphs are graphs showing the carbon content in the molten metal as evaluated by the analysis of the composition and the solidification temperature. In the graphs of the twelfth and thirteenth graphs, the horizontal axis represents values of collected samples according to a carbon analysis (CA), and the vertical axis represents estimated carbon values. In the comparative example of Fig. 12, it can be seen that the carbon content deviates from the red dashed line representing a predetermined range (± 0.06%) from the solid blue line (when the value of the horizontal axis coincides with the value of the vertical axis). On the other hand, in the specific example 2 of the thirteenth figure, a stable result can be seen, wherein the carbon content lies within a predetermined range (± 0.06%) from the solid blue line.

Although the molten metal has been introduced into the steel receiving chamber 10 through the steel receiving injection port 9, when the steel receiving injection port 9 has a relatively large angle, it occurs in which the molten metal and the steel receiving Note that the corner of the inlet 9 collides with the vortex phenomenon and forms a turbulent flow. In this way, air and gas are mixed together, so the corner portion 9r of the steel receiving injection port 9 can have a circular arc shape to avoid the occurrence of eddy currents.

In addition, as illustrated in the sixth figure, although the steel receiving chamber 10 and the collecting chamber 18 are placed along the longitudinal direction of the housing container 107 without overlapping each other, the collecting flow channel 11 may be along the longitudinal direction of the housing container 107 and The steel receiving chambers 10 overlap. In this way, the high-temperature heat of the molten metal moving through the collecting channel 11 will affect the temperature measurement portion 22c of the first temperature sensor 22 located in the steel receiving chamber 10, so that the solidification temperature cannot be accurately measured. Therefore, the corner portion of the collection injection port 11 overlapping the steel receiving chamber 10 along the longitudinal direction of the shell container 107 can be processed into a circular arc shape, increasing the distance between the steel receiving chamber 10 and the collecting chamber 18 away from the collecting chamber. Partition wall thickness in 18 directions. By doing so, the high-temperature heat in which the molten metal flows through the collection flow channel 11 to affect the temperature measurement portion 22c can be minimized. In addition, when the corner portion of the collecting flow channel 11 is arc-shaped, the eddy current phenomenon caused by introducing the molten metal can be minimized.

In addition, in order to expand the usable range of the above-mentioned molten metal probe (that is, the measurement range of the solidification temperature of the molten metal), the solidification temperature can be effectively measured even if a molten metal having a low degree of superheat is introduced. In this way, the molten metal can be quickly introduced to minimize its temperature drop, so that the temperature at which the molten metal reaches the steel receiving chamber 10 is about the same as the temperature of the molten metal in the converter.

In this way, it is necessary to optimize the diameter of the steel receiving injection port 3a (and / or the opening 33a) (see reference symbol d in the fourth figure). According to the experimental results, when the diameter of the steel receiving injection port 3a is approximately 20 mm to 25 mm, the molten metal has a good filling performance. When the diameter of the steel receiving injection port 3a is about 20 mm or less, the molten metal will effectively fill the steel The receiving chamber 10 starts to solidify before, thus reducing the filling efficiency. When the diameter of the steel receiving injection port 3a is about 25 mm or more, the molten metal filled in the steel receiving chamber 10 will flow back, thus reducing the filling efficiency. The fourteenth and fifteenth drawings are diagrams showing a sample state according to the diameter of a steel receiving inlet. The diameter of the steel receiving injection port of FIG. 14 is about 17 mm, and the diameter of the steel receiving injection port of FIG. 15 is about 24.5 mm.

In addition, the steel receiving chamber 10 and the collecting chamber 18 may have a divided (or separated) steel receiving injection port 3a and a collecting injection port 3b for receiving a relatively large iron static pressure, respectively. This can be achieved because if the steel receiving injection port 3a and the collecting injection port 3b are integrated with each other, and the molten metal flows into the steel receiving chamber 10 and the collecting chamber separately, a vortex phenomenon that forms a vortex occurs and a turbulent flow is formed. This molten metal cannot be easily imported. In particular, the steel receiving flow path 9 may be inclined from the inflow hole 3 a in a direction away from the first temperature sensor 22. In this specification, the inclination angle θ between the cross section of the housing container 107 and the steel receiving flow path 9 may be about 20 ° to about 60 °. When the inclination angle θ is about 20 ° or less, the steel receiving injection port 3 a is far away from the front end of the molten metal probe, so it is very likely to introduce slag. When the inclination angle θ is about 60 ° or more, the charging efficiency of the molten metal decreases due to the large inclination angle.

In addition, the steel receiving injection port 3a and the collecting injection port 3b may be placed approximately 200 mm from the front end of the molten metal probe. That is, the distance D from the front end of the molten metal probe to the steel receiving injection port 3a is about 200 mm. When the immersion depth of the molten metal probe is set to about 500 mm to about 600 mm, this can ensure sample soundness and full efficiency.

The molten metal moving toward the collection chamber 18 will solidify in the collection container 23 and thus be used as a solidified sample for analysis, such as instrumental analysis. When drawn from the molten metal bath When the probe body 1 is impacted, the housing container 107 is destroyed due to the impact, and the collection chamber 18 is broken, so that the collection container 23 can be easily separated. The collection container 23 is then transported using a transport device and provided for analysis, such as instrumental analysis.

According to a specific embodiment of the present invention, the cooling rate of the molten metal can be increased to shorten the solidification time of the molten metal. In this way, the carbon content in the molten metal with a degree of overheating can be accurately estimated. Exceptionally, the molten metal can be smoothly introduced into the probe body.

The above related subject matter is merely illustrative and not restrictive, and the scope of patent application is intended to cover all such modifications, enhancements, and other specific embodiments within the spirit and scope of the present invention. In this way, in order to have the maximum scope of legal application, the scope of the present invention is determined by the most permissive interpretation of the scope of the following patent applications and its appended items, and is not limited or restricted by the foregoing detailed description.

Claims (10)

A housing container for a composite probe, which is immersed in a molten metal to allow the molten metal to be introduced therein. The housing container includes: an inflow hole defined in a side surface of the housing container to allow the molten metal Introduced into it; a receiving chamber and a collecting chamber, wherein the molten metal is introduced through the inflow hole to fill it; a receiving flow channel connecting the inflow hole to the receiving chamber; and a collecting flow channel, which The inflow hole is connected to the collection chamber, wherein the housing container further includes a first temperature sensor including a temperature measuring portion located in the receiving chamber, and an uneven pattern is formed in the receiving chamber. An inner surface of the receiving chamber; wherein the receiving chamber has a rectangular parallelepiped shape, and the receiving chamber has a longitudinal short surface and a longitudinal long surface defined along a longitudinal direction, the longitudinal short surface and the longitudinal long surface In comparison, a central portion away from the receiving chamber is formed on the longitudinal short surface of the inner surface of the receiving chamber. The receiving chamber has a volume divided by Surface area to volume ratio of from about 4 to about 4.5, the solidification temperature to produce a flat portion. For example, the shell container of the scope of patent application, wherein the collection chamber is placed along a longitudinal direction of the shell container, and the collecting flow channel has a corner portion having a circular arc shape. For example, the shell container of the scope of patent application, wherein the receiving flow channel is inclined from the inflow hole in a direction away from the first temperature sensor, and The inclination angle between the cross-section of the housing container and the receiving runner is about 20 ° to about 60 °. For example, the shell container of the scope of patent application, wherein the inflow hole includes: a receiving injection port, which is arranged to communicate with the receiving chamber; and a collecting injection port, which is arranged to communicate with the collecting chamber, wherein The receiving injection port and the collecting injection port are separated from each other. For example, the shell container of the scope of patent application No. 4, wherein the receiving injection port has a diameter of about 20 mm to about 25 mm. For example, the shell container of the patent application No. 4 wherein the shell container further includes a second temperature sensor located on a front end of the shell container to measure the temperature of the molten metal. For example, the shell container of the fifth or sixth aspect of the patent application, wherein the collection chamber and the receiving chamber are both placed along a longitudinal and lateral direction of the shell container, and do not overlap each other. For example, the shell container of the scope of patent application, wherein the shell container further includes a second temperature sensor located on a front end of the shell container to measure the temperature of the molten metal and the inflow hole. It is defined at a distance of about 200 mm from the front end of the shell container toward the longitudinal direction of the shell container. A composite probe includes: a main branch tube arranged to allow the molten metal to be introduced into the composite probe through an opening defined in a side portion of the main branch tube in a state where the main branch tube has been immersed in the molten metal. A needle; an outer branch tube located on an outer portion of the main branch tube to close the opening; A housing container built into the main branch pipe; first and second temperature sensors located on the housing container; and a connector electrically connected to the first temperature sensor And a second temperature sensor, wherein the housing container includes: an inflow hole defined in a side surface of the housing container, communicating with the opening to allow the molten metal to be introduced thereinto; a receiving A chamber and a collection chamber, wherein the molten metal is introduced thereinto through the inflow hole and filled therein; a receiving flow channel connecting the inflow hole to the receiving chamber; and a collection flow channel which connects the inflow hole Connected to the collection chamber, wherein a temperature measuring part of the first temperature sensor is located in the receiving chamber, and the second temperature sensor is located on a front end of the housing container, an uneven pattern is formed on On an inner wall of the receiving chamber, wherein the receiving chamber has a rectangular parallelepiped shape, the receiving chamber has a longitudinal short surface and a longitudinal long surface defined along a longitudinal direction, and the longitudinal short surface and The longitudinal table In comparison, a central portion away from the receiving chamber, the pattern is formed on a longitudinal short surface of the inner surface of the receiving chamber, the receiving chamber having a volume divided by a surface area of about 4 to about 4.5 The volume ratio to produce a flat portion at a solidification temperature. For example, the composite probe according to item 9 of the application, wherein the collection chamber is placed along a longitudinal direction of the housing container, and the collection flow channel has a corner portion having a circular arc shape.