JPH05273197A - Fused metal sample collecting device - Google Patents

Abstract

PURPOSE:To provide a fused metal sample collecting device allowing uniform deoxidation over the whole sample. CONSTITUTION:A sampler 4 is formed with an inflow chamber 5 receiving a fused metal and a sample collecting chamber 7 communicated with the inflow chamber 5 and filling and coagulating the fused metal. A deoxidizer 18 is stored in the inflow chamber 5, a communication section 14 between the inflow chamber 5 and the sample collecting chamber 7 is blocked by a blocking member 19, the blocking member 19 is fused after the fused metal is fed and filled in the inflow chamber 5, and the communication section 14 is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten metal sampler for collecting molten steel, hot metal, etc. and using the collected solidified sample for analysis.

[0002]

2. Description of the Related Art Conventionally, a molten metal sampler for sampling molten metal such as molten steel or hot metal as a sample has an inflow chamber into which the molten metal is introduced from the side and a communication hole at the bottom of the inflow chamber. And a sample-collecting chamber for forming a sampling chamber for filling and solidifying the molten metal, and in particular, in a sampler for sampling molten metal such as carbon steel or stainless steel, the inflow chamber is It is known to provide a deoxidizer in the.

The deoxidizer is formed of Al, Ti or the like into a foil shape (extremely thin plate shape) or a linear shape, and is contained in the inflow chamber.

When collecting the molten metal by immersing the apparatus in the molten metal, the molten metal is filled in the sampling chamber through the inflow chamber. Therefore, the inflowing molten metal is deoxidized by the deoxidizing agent in the inflow chamber, and after being deoxidized, it is filled in the sampling chamber and solidified. The purpose of deoxidizing the molten metal in this way is to prevent generation of cavities due to residual gas inside the solidified sample.

[0005]

For the above-mentioned purpose, the amount of the deoxidizing agent contained in the inflow chamber should be a necessary and sufficient amount in consideration of the amount of the sample collected in the sampling chamber. Determined.

In the conventional structure, as soon as the molten metal flows into the inflow chamber, the deoxidizing agent is immediately melted and mixed into the molten metal. Since the inflow chamber is directly communicated with the sampling chamber, the molten metal flowing into the inflow chamber immediately enters the sampling chamber and is filled and solidified.

By the way, the cylindrical metal sample collected by the cup-shaped sampler is about 15 to 2 from the bottom of the sample.
The upper part of about 0 mm is cut in the diametrical direction, and the cut surface is polished, and the polished surface is used for emission spectroscopic analysis.
According to the investigation conducted by the present inventors, it has been found that analysis is often impossible due to abnormal light emission and poor analysis due to composition segregation.

[0008] Then, as a result of an investigation to find out the cause, it was found that it was caused by the following two problems.

[0009] That is, first, as seen in AOD furnace and secondary refining furnace or the like, forced injection inert gas (A _r, N _2, etc.) in order to stir forcibly the bath and O ₂ gas from the bottom portion of the furnace In the furnace, a large amount of gas bubbles are mixed in the bath, so the molten metal sampled by the sampler contains a large amount of gas. Therefore, in the conventional sampling device, since molten metal is allowed to flow into the sampling chamber from the inflow chamber and solidifies while containing such a gas, solidification of the solidified sample including the analysis surface is caused by residual gas. Is seen,
This causes abnormal light emission.

Secondly, in the conventional sampling device,
The deoxidizer contained in the inflow chamber is melted by a small amount of molten metal that first flows into the inflow chamber, and moves from the inflow chamber to the sampling chamber while being mixed with the molten metal. In other words, the deoxidizer follows a small amount of molten metal that does not sufficiently fill the sampling chamber and is drawn into the sampling chamber from the inflow chamber at an early stage. The molten metal enters the sampling chamber without being deoxidized in the inflow chamber anymore. For this reason, the sample packed and solidified in the sampling chamber is not uniformly deoxidized throughout, and segregation of the deoxidizer (for example, aluminum segregation) occurs between the sample bottom and the top, which is the cause of composition segregation. Has become.

[0011]

The present invention solves the above-mentioned conventional problems and enables sufficient degassing to prevent the formation of cavities in a sample, and The present invention provides a molten metal sampling apparatus capable of preventing composition segregation in a sample by enabling uniform deoxidation throughout.

Therefore, the first aspect of the present invention is that the inflow chamber for inflowing the molten metal from the side is communicated with the lower part of the inflow chamber through the communication hole to fill and solidify the molten metal. In a molten metal sampler having a sampler forming a sampling chamber and a deoxidizer provided in the inflow chamber, a closing member that melts after the molten metal flows into the inflow chamber and is filled in the inflow chamber. By this, the communication hole between the inflow chamber and the sampling chamber is closed.

The second aspect of the present invention is that the closing member is a thin metal plate having a wall thickness of about 0.1 to 1.0 mm.

Further, the third aspect of the present invention is that the closing member is provided with a melting control portion selected from one or a plurality of protrusions, recesses and pinholes.

[0015]

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, a cylindrical probe main body 1 with its tip facing downward comprises a plurality of protective tubes 2 and 3 made of paper tubes.
Are fitted inside and outside, and the sampler 4 is housed inside near the tip of the probe body 1.

The sampler 4 is a sample forming an inflow guide container 6 for forming an inflow chamber 5 for inflowing the molten metal, and a sample collecting chamber 7 communicating with the inflow chamber 5 for filling and solidifying the molten metal. The collection container 8 and the collection container 8 are arranged one above the other.

The inflow guide container 6 is preferably formed of a heat-resistant molded product such as a shell mold that is easily mechanically disintegrated, but may be formed of a metal such as steel. Further, in the illustrated example, the inflow guide container 6 is provided with a cylindrical side wall 9
And the lid member 10 that closes the top of the cylindrical body, the side wall 9 and the lid member 10 may be integrally formed.

The inflow chamber 5 is provided with an inflow port 11 on the side of the inflow guide container 6. The inlet 11 has a nozzle member 12 made of ceramics or other heat-resistant material.
Is provided, and the opening of the nozzle member 12 is provided in the probe main body 1.
Is covered with a protective film 13 such as thin paper provided on the outer periphery of the. This protective film 13 is lost when the device is immersed in the molten metal after the device passes through the slag layer and sinks to a predetermined position in the molten metal bath, and causes the nozzle member 12 to open. The molten metal flowing in through the above is caused to flow into the inflow chamber 5.

The sampling container 8 is made of metal such as steel. The sample collection chamber 7 has a cup shape so as to collect a cylindrical sample, and thus constitutes a cup-shaped sampler.

The inflow chamber 5 and the sampling chamber 7 are both chambers 5,
7 are communicated with each other by a communication hole 14 having a smaller diameter than the inner diameter of 7. In the case of the illustrated example, the inflow guide container 6 and the sampling container 8
An annular partition member 15 is interposed between the partition member 1 and
Although the communication hole 14 is formed in 5, the partition member 15 may be formed integrally with the inflow guide container 6 and / or the sampling container 8.

The tip of the probe body 1 is closed by a ceramic plug 16 and is provided with a temperature measuring element 17 for measuring the temperature of the molten metal bath.

In the above construction, the inflow chamber 5
A deoxidizer 18 is provided inside. This deoxidizer 18
Is formed into a foil shape (extremely thin plate shape) or a linear shape from Al, Ti and the like and is housed in the inflow chamber 5, but the housing method is not limited.

The communication hole 14 that connects the inflow chamber 5 and the sampling chamber 7 is closed by a closing member 19, and the closing member 19 is formed in a thin plate shape by a material that does not affect the sample analysis value. Has been formed. That is, as will be described later, the closing member 19 melts after the molten metal flows into the inflow chamber 5 and is filled in the inflow chamber 5. Therefore, the communication hole 14 is closed until the closing member 19 is melted, and the communication hole 14 is opened after the closing member 19 is melted after a predetermined time elapses.

In the embodiment shown in FIG. 1, the closing member 19
Is formed into a disk-shaped thin plate and is interposed between the inflow guide container 6 and the partition member 15, thereby closing the communication hole 14 from the inflow chamber 5 side, but the invention is not limited to such a configuration. Modifications such as those shown in FIGS. 2A to 2C are possible.

In the modified embodiment shown in FIG. 2A, the closing member 19 has a recess 20 provided on one side of the partition member 15.
, Thereby closing the communication hole 14 from the inflow chamber 5 side.

In the modified embodiment shown in FIG. 2 (B), the partition member 15 is divided into superposed split pieces 15a and 15a.
b, and the communication hole 14 is closed by interposing a closing member 19 between the two divided pieces.

In the modified embodiment shown in FIG. 2 (C), the closing member 19 is interposed between the partition member 15 and the sampling container 8 to close the communication hole 14 from the sampling chamber 7 side. ing. At this time, the partition member 15 may be formed integrally with the inflow guide container 6 as shown in the figure, but may be formed separately as shown in FIG.

In these examples, when the apparatus is immersed in molten metal for collecting molten metal, the molten metal flowing into the inflow chamber 5 is sampled until the inflow chamber 5 is sufficiently filled. Do not enter chamber 7. That is, the molten metal flows into the inflow chamber 5 with a stirring flow and immediately melts and mixes the deoxidizer 18 while being rolled up in the molten metal, but the closing member 19 prevents the molten metal from entering the sampling chamber 7. Therefore, it is filled in the inflow chamber 5, and is retained there.

Therefore, the molten metal flowing into the inflow chamber 5 is
Immediately, the gas stays in the inflow chamber 5 without being allowed to enter the sampling chamber 7, and during that time, a large amount of gas contained in the molten metal is floated upward to perform degassing.

The molten metal filled in the inflow chamber 5 is
Before entering the sampling chamber 7, the deoxidizing agent 18 is melted and dispersed by a stirring flow while being mixed, and the deoxidizing agent melted by the combined action of the density difference and the concentration difference with the molten metal is homogeneous in the molten metal. The molten metal is mixed under various distribution conditions, and a uniform deoxidation treatment is performed on the entire molten metal in the inflow chamber 5.

Therefore, after such a short residence time,
When the closing member 19 melts and the closed state between the inflow chamber 5 and the sampling chamber 7 is released and the communication hole 14 is opened, the molten metal that has been degassed and subjected to the uniform deoxidizing treatment flows in as described above. From the chamber 5 to the sampling chamber 7, the sample chamber 7 is filled all at once, and is solidified there.

The molten metal thus made to flow down from the inflow chamber 5 to the sampling chamber 7 all at once is filled in the vicinity of the bottom of the sampling chamber 7 in a degassed state, so that at least from the bottom of the sampling chamber 7. The molten metal filled up to a predetermined height does not contain a large amount of gas. Therefore, in the metal sample filled and solidified in the sampling chamber 7, at least a portion corresponding to the analysis surface (generally, a portion approximately 15 to 20 mm above the bottom of the sampling chamber 7) is a nest due to residual gas. Does not occur.

Further, as described above, the molten metal that is made to flow down from the inflow chamber 5 to the sampling chamber 7 at once is subjected to homogeneous deoxidation in advance, so that the solidified sample collected in the sampling chamber 7 Of these, composition segregation does not occur at least in the portion corresponding to the above-mentioned analysis surface. Regarding this point, even if deoxidation in the inflow chamber 5 is insufficient and unmelted oxygen is contained in the molten metal, the molten metal entering from the inflow chamber 5 has a relatively small diameter. Since it instantaneously turbulently flows into the sampling chamber 7 through the established communication hole 14, secondary deoxidation by stirring and dispersion of the deoxidizing agent based on the flow phenomenon is expected, and thereupon complete melting of the molten metal is completed again. It is uniformly deoxidized. Therefore, the solidified sample collected by the sample collection chamber 7 is uniformly deoxidized over the entire sample including the analysis surface, and segregation of the deoxidizing agent as in the conventional case does not occur.

By the way, in this way, the molten metal is introduced into the inflow chamber 5
For the purpose of filling the sampling chamber 7 with molten metal that has been degassed and subjected to homogeneous deoxidation, the volume of the inflow chamber 5 should originally be as large as possible. It is preferable to make the volume of the sampling chamber 7 relatively small. However, in the sampler for the purpose of sampling, if the inflow chamber 5 is simply enlarged, not only the sample but also the amount of unnecessary solidified metal that subsequently enters the inflow chamber 5 increases, which is not preferable. There is a problem that it hinders downsizing of the entire device. Therefore, it is desirable to make the volume of the inflow chamber 5 as small as possible within the scope of the object of the present invention in which the closing member 19 is provided. As described above, the present invention, among the collected coagulated samples, at least in a portion corresponding to the analysis surface, the purpose is to prevent abnormal light emission due to the occurrence of nests, composition segregation due to non-uniform deoxidation, This is because, even if a nest or composition segregation occurs at a portion greatly deviated from such an analysis surface, it does not necessarily go against the purpose of the present invention.

Next, as described above, the present invention provides the closing member 1.
The purpose of providing 9 and the function of this closing member 19 is to fill the inflow chamber 5 with a necessary and sufficient amount of molten metal, and to perform the degassing and the uniform deoxidizing treatment required in this filled state from the inflow chamber 5 to the sample. The point is inflow timing control that delays the entry into the collection chamber 7. Therefore, the closing member 1
No. 9 does not melt immediately as soon as the molten metal flows into the inflow chamber 5, and it is necessary that it does not melt until the inflow chamber 5 is filled with the necessary and sufficient molten metal even for a short time. However, on the other hand, the closing member 19 needs to be melted without delay after the necessary degassing of the molten metal in the inflow chamber 5 and the uniform deoxidation have been performed. When the lid is closed and melting of the closing member 19 is delayed, the inflow chamber 5
In this case, the solidification tendency of the molten metal progresses, and as a result, the molten metal does not smoothly enter the sampling chamber 7 from the inflow chamber 5, and it becomes impossible to secure sufficient filling of the sample in the sampling chamber 7. is there.

Regarding this point, if the internal dimensions of the samplers 4, 4a including the inflow chamber 5 and the sampling chamber 7 are about 30 to 40 mm in diameter and 110 to 130 mm in length, the meat of the closing member 19 will be described. The thickness varies depending on the melting point of the material, but it is preferably about 0.1 to 1.0 mm in total. This is because the closing member 19 is melted about 0.5 to 3.0 seconds after the start of the inflow of the molten metal into the inflow chamber 5, and the above-mentioned purpose is achieved.

According to the experiments conducted by the present inventors, the closing member 19
When the molten metal has a small thickness and melts in less than 0.5 seconds after starting to flow into the inflow chamber 5, sufficient time for degassing the molten metal in the inflow chamber 5 and performing homogeneous deoxidation Not secured. Therefore, the melting time of the closing member 19 is 0.5.
Must be more than a second.

On the other hand, when it takes a long time to melt the closing member 19, the molten metal tends to solidify. For example, when the inflow chamber 5 is formed of a steel container, the wall thickness of the closing member 19 is large, and the closing member 19 has a thickness of 2.0 before melting.
When it exceeds the second, the solidification tendency of the molten metal appears. Therefore,
In this case, the melting time of the closing member 19 needs to be within 2.0 seconds. On the other hand, when the inflow chamber 5 is formed of a container made of a heat insulating material such as the shell mold or ceramics described above, the tendency of the molten metal to solidify appears after 3.0 seconds. Therefore, in this case, the melting time of the closing member 19 must be within 3.0 seconds.

Therefore, in carrying out the present invention, the closing member 19 may have various structures capable of controlling the melting time while keeping the wall thickness within the range of 0.1 to 1.0 mm. It is possible.

In FIG. 3 (A), the closing member 19 is provided with one or a plurality of protrusions 19a protruding toward the inflow chamber 5, and thereby constitutes a melting control section. According to this embodiment, when the molten metal M is poured into the closing member 19 from the side of the inflow chamber 5, the protrusion 19a is first melted to form a hole, and the closing member 19 is gradually expanded. Melt. Therefore, as compared with the case without the protrusion 19a,
By providing the protrusion 19a, the melting time of the closing member 19 can be shortened. Further, the melting time can be further promoted by increasing the number of the protrusions 19a.

In contrast to the above, in FIG. 3B, one or a plurality of small recesses 19b facing the inflow chamber 5 are provided in the closing member 19 to form a melting control section. Also in this embodiment, the molten metal M flows from the inflow chamber 5 side to the closing member 1
When it is poured into 9, the concave portion 19b is first melted to form a hole, and the closing member 19 is melted in a direction of gradually expanding the hole. Therefore, the same effect as the protrusion 19a can be obtained.

In FIG. 3C, the closing member 19 is provided with one or a plurality of pinholes 19c to form a melting control section. According to this embodiment, the molten metal M
When is poured into the closing member 19 from the inflow chamber 5 side, the closing member 19 is melted in the direction of gradually expanding the pinhole from the portion of the pinhole 19c. Therefore, the protrusion 19a
The same effect as can be obtained.

The projections 19a, the recesses 19b, and the pinholes 19c can be selected in any one mode or in a combination of a plurality of modes, and the melting time of the closing member 19 can be controlled by design. it can.

The closing member 19 is formed in a thin plate shape with a material whose melting point is higher than that of the deoxidizer 18 and which does not affect the sample analysis value. Therefore, the closing member 19 is, for example,
When the deoxidizer 18 is Al, it is preferable to use a thin plate formed of Ti. In addition, the melting point of Ti (about 1680 ° C.) is higher than the melting point of Al (about 660 ° C.), which meets the above-described object of the present invention and does not affect the sample analysis value. In this regard, Ti has a melting point of 1680.
Since the temperature is in degrees Celsius, when it comes into contact with a molten metal whose temperature is higher than this melting point, it melts in a desired time, and the above-mentioned closing member 1
Since it functions as 9, it is suitable for collecting such a high temperature molten metal. However, the closing member 19 formed of such a thin plate of Ti contains Fe and other contents in the molten metal flowing into the inflow chamber 5 even when the molten metal having a melting point or lower, that is, 1680 degrees Celsius or lower is sampled. Depending on the reaction with the components, TiFe ₂ or T
Since it becomes a compound of iFe, its melting point is gradually lowered from the surface, and it melts after a lapse of a predetermined time, so that the above-mentioned intended purpose can be achieved.

In addition, when the closing member 19 is made of Ti, Ti itself has a deoxidizing function and a denitrifying function, so that this can be advantageously used. That is, according to the present invention, as described above, the molten metal flowing into the inflow chamber 5 is uniformly deoxidized by the deoxidizer 18, but if the closing member 19 is Ti, Oxygen of the above compound with titanium to become O + Ti = TiO ₂ , and deoxidation can be promoted also from this point. Further, titanium is combined with nitrogen in the molten metal to give N + Ti = TiN, so that the molten metal is denitrified to facilitate sample analysis after sampling.

By the way, when a molten metal sample is taken, it is common to use Al as the deoxidizer 18, but some sampling steel grades analyze Al element in molten metal, In this case, Al cannot be used as the deoxidizer 18. Therefore, in such a case, a Ti foil or a thin wire is used as the deoxidizer 18, but the closing member 19 of the present invention can be formed of a Ti thin plate in this case as well. is there. Cover with a thin foil of deoxidizer 18 (for example, 0.05
mm) to make it easy to melt, while the closing member 1
This is because the object of the present invention can be achieved by forming the wall thickness of 9 to 0.1 to 1.0 mm as described above.

However, the present invention does not particularly limit the material of the closing member 19. For example, when extracting molten steel having a low refining temperature, it is possible to use a thin plate selected from Fe or Cu, and in the case of ultra-low carbon steel refining, a thin plate made of the same material as the extracted metal. May be used.
Further, it is also possible to use a thin plate of Ni as the closing member 19.

In another embodiment shown in FIG. 4, the sampler 4 includes a cylindrical portion 2 fixed to a lid portion 10 of an inflow guide container 6.
1 integrally or separately, the tubular portion 21 protects the temperature measuring element 22 from the inflowing molten metal, and the temperature measuring element 2
2 is passed through the closing member 19 and inserted into the communication hole 14,
The temperature measuring end 22a at the tip is approximately at the center of the sampling chamber 7, that is,
The molten metal sample in the sampling chamber 7 faces the final solidifying area. Therefore, with this, the sampler 4
It is used as a device for a dynamic control system for measuring the amount of C in a sample by measuring the sample solidification temperature by using the temperature measuring element 22 as a means for sampling the molten metal.

Therefore, in this embodiment, the closing member 1
Reference numeral 9 has an opening 23 for inserting a midway portion of the temperature measuring element 22, and the outer peripheral surface of the temperature measuring element 22 is restricted by the opening 23. As a result, the midway portion of the temperature measuring element 22 in the longitudinal direction is supported by the opening 23. Therefore,
Even if the temperature measuring element 22 has a fragile structure, such a support suitably prevents the temperature measuring element 22 from being broken by the molten metal flowing in from the inlet 11, and the closing member 19 prevents the temperature measuring element 22 from being broken. In addition to the inflow timing control as described above, it also has a function of supporting the temperature measuring element 22. Other configurations are the same as those in the above-described embodiment, and are denoted by the same reference numerals.

Next, FIG. 5 shows the result of an experiment conducted to confirm the homogeneous deoxidizing effect of the present invention.

This experiment uses the sampling device as shown in FIG. 1, and there is one having no closing member 19 (hereinafter referred to as a conventional example) and one having a closing member 19 (hereinafter referred to as the present embodiment). The two samples were prepared, and the segregation status of the deoxidizer in the sample was measured by performing emission spectroscopic analysis on the molten steel samples collected by each.

The conditions of the sampler used in the experiment were 700 g for the sample weight (sample coagulated in the sampling chamber 7) for both the conventional example and the present example, and the inflow chamber with respect to the volume X of the sampling chamber 7. The volume Y of 5 was Y / X = 1.0, and the inflow chamber 5 contained 1.05 g of Al foil as the deoxidizer 18. The closing member 19 used in this example is
It is a titanium thin plate with a wall thickness of 0.5 mm.

Then, using each of the conventional example and the present example, molten steel was sampled at the final stage of oxidation of the stainless steel refining furnace, and the aluminum (deoxidizing agent) in the solidified sample collected by each sample was removed. The distribution was observed. As shown in FIG. 5 (A), the measurement points of this aluminum are obtained by cutting the sample S in the axial direction substantially along the center, and measuring three points S1 of the cut surface 10 mm from the bottom of the sample.
Three 0mm points S2, three 30mm points S3, 40
Three points S4 of mm and three points S5 of 50 mm were extracted.

The measurement results are shown in FIG. 5 (B). In the sample collected by the conventional example, the vicinity of the bottom of the sample (measurement point S1) to the upper part of the sample (measurement point S5) are shown.
It was confirmed that the precipitation value of aluminum decreased drastically as it reached. On the other hand, in the sample collected according to the present example, aluminum is uniformly distributed throughout the sample, and the presence of the closing member 19 causes the deoxidizer 18 to be mixed homogeneously in the sample. It was proven.

[0056]

According to the present invention as set forth in claim 1, when collecting molten metal, the molten metal flowing into the inflow chamber 5 is prevented from immediately entering the sampling chamber 7 by the closing member 19. Since the inflow chamber 5 is once filled with the gas and retained therein, gases such as Ar and CO ₂ in the molten metal are floated and degassed during the retention in the inflow chamber 5. At the same time, the molten metal filled in the inflow chamber 5 is uniformly deoxidized by the deoxidizing agent 18 during the stay. Then, when the closing member 19 is melted and the communication hole 14 is opened after this short residence time, the molten metal that has been degassed and uniformly deoxidized in advance in the inflow chamber 5 flows down at once, and is in a degassed state. As it is, it is instantly filled from the bottom of the sampling chamber 7 to the upper side of the analysis surface. Therefore, the coagulated sample filled and collected in the sample collection chamber 7 does not have a nest at least in the vicinity of the analysis target portion including the analysis surface, and therefore does not cause abnormal light emission as in the conventional case during emission spectroscopic analysis. Moreover, since the deoxidizing agent is uniformly distributed, composition segregation as in the conventional case does not occur, and there is an effect that good results can be brought to sample analysis such as optical emission spectroscopy.

Particularly, in the past, if the amount of the deoxidizer added to the weight of the sample was properly determined, the deoxidation of the sample would be poor as described above, whereas if the amount of the deoxidizer was increased, the amount of the deoxidizer in the sample was deoxidized. In addition to the significant segregation of the agent, which included the fatal problem of making the instrumental analysis of the sample difficult due to excessive addition, according to the present invention, the addition amount of the deoxidizing agent to the sample weight It suffices to carry out the treatment based on an appropriate value, which has the excellent effect that homogeneous deoxidation can be performed.

According to the second aspect of the present invention, the closing member 19 is melted in accordance with a sufficient time required for degassing and homogeneous deoxidation of the molten metal in the inflow chamber 5. Therefore, the communication part between the inflow chamber 5 and the sampling chamber 7 is closed during the time required for degassing and homogeneous deoxidation of the molten metal, while the molten metal in the inflow chamber 5 is melted before a tendency to solidify appears. Then, there is an effect that the communication portion can be opened and the molten metal can be introduced into the sampling chamber 7 and filled.

According to the third aspect of the present invention, it becomes possible to control the melting time of the closing member 19 in design according to the type and temperature of the molten metal, and the optimum conditions for achieving the object of the present invention can be obtained. There is an effect that the sampler can be easily provided.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a modified embodiment of the closing member.

FIG. 3 is an enlarged vertical cross-sectional view showing each embodiment of the melting control unit implemented on the closing member.

FIG. 4 is a vertical sectional view showing another embodiment of the present invention.

5A and 5B show analysis results of samples collected by a sampler based on an example of the present invention and a sampler based on a conventional example, respectively. FIG. 5A is an explanatory diagram showing analysis points of the sample, and FIG. It is a diagram comparing the analysis results.

[Explanation of symbols]

 4 Sampler 5 Inflow chamber 6 Inflow guide container 7 Sampling chamber 8 Sampling container 11 Inflow port 14 Communication hole 18 Deoxidizer 19 Closing member 19a Protrusion 19b Recess 19c Pinhole S Sample

Claims (3)

[Claims] 1. A sampler comprising: an inflow chamber into which molten metal flows in from a side; and a sampler chamber which communicates with a lower portion of the inflow chamber through a communication hole to fill and solidify the molten metal. In a molten metal sampling device in which a deoxidizer is provided in the inflow chamber, a communication member between the inflow chamber and the sampling chamber is provided by a closing member that melts after the molten metal flows into the inflow chamber and is filled in the inflow chamber. A molten metal sampling device, characterized in that the molten metal sampling device is closed. 2. The closing member has a wall thickness of about 0.1 to 1.0 mm.
2. The molten metal sampling device according to claim 1, wherein the molten metal sampling device comprises a thin metal plate. 3. The molten metal sampling device according to claim 2, wherein the closing member is provided with a melting control portion selected from one or more of a protrusion, a recess, and a pinhole.