JPH0821832A - Sample collecting device and sample collecting method for fused metal - Google Patents

Abstract

PURPOSE:To provide a sample collecting device for a fused metal capable of easily extracting a sample, having a short runner, obtaining the sample having a shape capable of being automatically conveyed directly after sampling, capable of obtaining samples having different shapes via one action, capable of easily preparing the sample for an analysis, and excellent in workability and economical efficiency CONSTITUTION:This sample collecting device for a fused metal is provided with a sample die 1 having a hollow portion filled with a fused metal having an optional shape, a sample guide section 7 guiding the fused metal into the hollow portion, and a small hole 12 for discharging the exhaust gas from the hollow portion; a small container 2 having an opening section with a removable and sealable cover 5 at the upper section, a hole section 8 to be removably inserted with the sample guide section of the sample die 1 at the bottom section, and a through hole 9 for exhausting the air in the container 2; and an air passage connected to the through hole 9 and provided in or near a support rod 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has different shapes such as a thick plate-like sample for emission spectroscopic analysis of molten metal and a thin plate-like sample for C / S / N gas analysis. The present invention relates to a molten metal sampling device that can collect samples simultaneously and easily.

[0002]

2. Description of the Related Art Conventionally, in steelmaking, process control and product control are performed by sampling molten metal and performing composition analysis of metal components by emission spectroscopic analysis or gas analysis such as C / S / N. Is being done.
As a molten metal sampling device used at this time,
A small cup-shaped container made of metal or refractory having a handle as shown in FIG. 5 is used, and the container is immersed in a container containing molten metal to a certain position to melt the molten metal in a small container. After pumping into the inside, after cooling, the container is turned upside down to take out a truncated cone-shaped sample, which is then subjected to processing such as cutting out into an appropriate shape according to the purpose of analysis, and various analytical samples as described above. Is being prepared.

However, in the above-mentioned conventional method, although the process of pumping the molten metal into a small container is simple, slag floating above the molten metal is easily mixed in the sample, and the metal is solidified. After this, the sample for analysis has to be processed such as cutting out, and there is a problem that sample preparation is complicated. Furthermore, since the entire cup-shaped small container is immersed in the container containing the molten metal, the molten metal overflows from the container and the molten metal gets on the edge of the container, and when the metal solidifies in that state, burr occurs. However, there is a problem that the obtained sample is very difficult to take out. Further, there is a problem in that this portion must be removed when the collected sample is sent by air or when a sample for analysis is prepared. Furthermore, in recent years, in order to perform daily process management and the like, the above-mentioned device is automated and used as an automatic sampler to save the labor of sampling work. In such a case, the obtained sample is automatically transported to a place such as various automatic analyzers by air feeding or the like for analysis and the obtained analysis results are Immediate feedback is given to the determination of set values, etc. to manage processes and products. Therefore,
In particular, in such a case, the above problem causes frequent troubles and is not only a problem that the automated sampling device lacks reliability but also a serious problem that impairs the workability of the production line itself. .

In recent years, as a molten metal sampling device, there has been provided a sampling device having two halves having a hollow portion in which molten metal made of a heat-resistant ceramic or a metal material is sampled. Various sampling equipment that can be used to introduce molten metal into the hollow part under static pressure and then solidify to take out a metal block with a specific shape and obtain samples with a shape that matches various analytical purposes or analyzers. Are known (JP-A-63-32370, JP-A-3-1).
No. 07763). In the device, by devising the shape of the hollow portion, for example, a sample for emission spectroscopy analysis and a C.
It is also possible to simultaneously take out samples having different shapes, such as samples for S / N gas analysis. However,
The shape of the sample obtained by these devices is formed as a so-called foot, that is, a so-called foot, which is an introduction path (runner) for the molten metal with a long introduction part reaching the hollow portion. Since the smoothness is impaired, the legs must be cut off, which makes it difficult to automate the sampling.

[0005]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide an automatic sampler of the type which collects a sample by pumping up molten metal with a small cup-shaped container or the like as described above. Solves the problems of the difficulty of taking out the sample and the complexity of the processing when preparing the sample for analysis such as cutting out the sample, and moreover the sample of so-called lollipop type is sampled. The complexity of sample preparation such as cutting the foot part of the sample that the sample collection device had was solved at once, and samples with different shapes suitable for various analysis purposes or analysis devices can be operated with one operation. Can be obtained at the same time,
It is an object of the present invention to provide a simple molten metal sampling device which is suitable for automation of sampling and can achieve labor saving.

[0006]

The above objects can be achieved by the present invention described below. That is, the present invention provides a molten metal sampling device comprising a small container having a detachable lid, a support rod for supporting the container, and a sample mold housed in the small container. A hollow portion filled with a molten metal in the shape of, a sample introduction portion for guiding the molten metal to the hollow portion, and a vent hole for venting the molten metal when the molten metal is introduced, An opening is provided in the bottom or side wall of the small container for the sample introduction part of the sample mold to be detachably fitted, and a side wall of the small container is provided with a through hole for exhausting the air in the small container to the outside. And a flow path of air connected to the through hole is provided in or near the support rod. is there.

[0007]

According to the present invention, it is easy to take out the sample in the state where the molten metal is solidified, and the obtained sample has a much shorter leg than the conventional sample (see FIG. 4).
(A) In the figure), the shape is such that it can be automatically conveyed immediately without performing processing such as cutting of legs after sampling, and the shape conforms to a plurality of analysis purposes or analysis devices in one operation. It is possible to simultaneously obtain different samples, and to provide a molten metal sampling device that is excellent in workability and economic efficiency, in which sample preparation is easy when it is used as an analytical sample.

[0008]

The present invention will be described in more detail with reference to the following preferred examples. The sampling device according to the present invention is shown in FIG.
As shown in one example thereof in FIG. 3, it comprises a small container with a lid, a supporting rod for supporting the container, and a sample mold housed in the small container. The sample mold contains at least a molten metal. It has a hollow portion that is filled in a shape, a sample introduction portion that guides the molten metal into the hollow portion, and a degassing small hole that serves as a passage for the gas exhausted from the hollow portion when the molten metal is introduced. In addition, an opening portion is provided in the bottom of the small container into which the sample introduction part of the sample type is detachably fitted, and a side wall of the small container has a through hole for exhausting the air in the small container to the outside. Further, an air flow passage connected to the through hole is provided in or near the support rod.

FIG. 1 is a vertical sectional view of the above-described sampling device according to the present invention.
For example, a small cup-shaped container 2 with a detachable lid,
A support rod 3 having a relatively long handle that supports the small container 2 and allows the small container 2 to be immersed in molten metal.
And a sample mold 1 housed in a small container 2.

First, the sample mold 1 will be described below.
The sample mold 1 includes a hollow portion at least filled with a molten metal in an arbitrary shape, a sample introducing portion for guiding the molten metal to the hollow portion, and a gas vent for exhausting the molten metal when the molten metal is introduced. Any shape may be used as long as it has a small hole for use, but specifically, the same as the sample type portion used when obtaining a conventional so-called lollipop type sample is preferably used. To be done. For example, the sample mold 1 is usually formed of a metal material such as an iron plate having a thickness of several mm or a heat-resistant ceramic material, so that the sample mold can be easily cracked later and the sample inside can be easily taken out. For example, as shown in the plan view of FIG. 1, it is preferable that two symmetrical iron halves are combined.
However, the members constituting the sample mold 1 are not limited to two halves as in this example, and for example, the periphery of the sample mold is made of a material such as ceramic and both side surfaces are made of iron plates. Any material can be used as long as it can achieve the intended purpose, such as being formed of a metal such as the above, and being configured by three divided bodies made of a composite material.

As the shape of the divided body, for example, when the two halves are combined as in the above-mentioned example, the sample introduction portion 7 capable of introducing the molten metal into the inside, and the molten metal solidified Has a small hole 12 for degassing, which has irregularities for forming a hollow portion so that a specific sample mold can be obtained, and through which the gas inside escapes when molten metal enters the hollow portion. The shape is not specified as long as it has at least one. For example, as shown in FIG. 1, when using the sample mold 1 in which a so-called lollipop type sample is obtained, it is preferable that the sample introduction part 7 is provided below the sample mold 1. Sample type 1 for obtaining so-called lollipop type sample
Since the lower part of the hollow part is extremely thin, as will be described later, when this part is immediately pulled out from the container containing the molten metal, the part immediately begins to solidify. This is because, unlike the case of forming into a so-called Zundu bomb type as shown in), the unsolidified molten metal does not drop from the sample introduction part 7 and the obtained sample does not sag.

Therefore, depending on the shape of the hollow portion of the sample mold 1, the sample introducing portion 7 formed in the sample mold 1 may be provided above the sample mold 1. For example, in the case where the sample introduction part 7 is provided on the upper part of the sample mold 1 and the molten sample is introduced from the upper part of the sample mold 1 into the hollow part, the hollow part of the sample mold 1 is, for example, a zigzag bomb mold. Even if it is formed, the above-mentioned sagging does not occur, and the inconvenience that a part of the obtained sample is dented does not occur. That is, the sample introduction part 7 of the sample mold 1 is preferably formed at an appropriate position and shape in consideration of the shape of the hollow part of the sample mold 1.

Further, the sample introducing section 7 of the sample mold 1 has a quartz tube 11 inserted therein, and one end of the quartz tube 11 is made of a metal or a heat-resistant ceramic material. It is preferable that the length of the quartz tube 11 is longer than that of the quartz tube 11 when the sample mold 1 is housed in the small container 2 as shown in FIG. With such a configuration, the sample introduction part 7 formed of a metal or a heat-resistant ceramic material does not melt. Furthermore, by providing a metallic lid 4 at the tip of the quartz tube 11 placed in the molten metal, immediately when the small container 2 containing the sample mold 1 is immersed in the molten metal bath, The molten metal does not enter the hollow part of the sample mold 1, passes through the slag part in the upper part of the molten metal bath, and when it reaches a certain sampling position, it is made of metal at the tip of the quartz tube 11. The lid 4 is melted and the molten metal penetrates into the hollow portion of the sample mold 1 through the quartz tube 11 installed in the sample introduction part 7 to perform sampling. At this time, as shown in FIG. 1, it is also a preferable embodiment to provide a stopper 13 inside the sample mold 1 so that the quartz tube 11 is installed at an appropriate position.

The small hole 12 for degassing provided in the sample mold 1 is replaced with the molten metal when the molten metal enters the sample mold 1 from the sample introduction part 7, and is hollow in the sample mold 1. The gas inside is pushed out to the outside (inside the small container), but it is provided as a passage for the gas at that time.
Therefore, if the gas in the hollow portion of the sample mold 1 is exhausted into the small container, the shape and number of the small holes 12, the position of the small holes 12 provided in the sample mold 1, and the like are not limited. As shown in FIG. 3, it is preferable that at least one of them is provided at the top of the sample mold 1. But,
Without being limited to this, in consideration of the position of the sample introduction part 7 of the sample mold 1 and the shape of the hollow part,
In order to achieve the intended purpose, it is preferable to appropriately form the film at the optimum position and shape.

The concavo-convex shape for forming the hollow portion provided in the sample mold 1 may be any shape as long as a certain amount of molten metal can be filled in the specific shape, but is preferably. The obtained metal sample after solidification has a so-called lollipop type, which is capable of collecting at least two plate-like samples having different thicknesses at the top and bottom as shown in FIG. 4 (a). The shape is preferably such that a sample can be obtained. Furthermore, it is preferable to form the inner surface of the hollow portion to be smooth so that the surface of the solidified sample taken out by breaking the sample mold 1 is smooth. That is, the solidified sample obtained by dividing the sample mold 1 requires polishing of the analysis surface when it is used as a measurement sample for emission spectroscopy, for example. Since the collected sample surface is smooth, polishing work of such an analysis surface is facilitated. As a result, the sample preparation is performed in a short time, and the analysis time and labor can be reduced.

Further, by using a so-called lollipop type sample mold 1 capable of collecting two kinds of plate-shaped samples having different thicknesses above and below such a mode, various operations can be performed by one operation. It is possible to simultaneously obtain samples of two different types of shapes that match the purpose of analysis or the analyzer. That is, by forming the uneven shape of the half-divided body so that the upper part of the hollow portion of the sample mold 1 is thick and the lower part is thin, a thick disc-shaped sample having a thickness of 4 to 10 mm, which is most suitable for an emission spectroscopic device or the like. In addition, it is possible to simultaneously obtain two types of samples having different thicknesses of thin disk-shaped samples having a thickness of about 2 to 4 mm, which are optimal for gas analysis. As a result, the sample with a large thickness is lightly polished to be an analysis sample for emission spectroscopy, and the sample with a small thickness is punched to obtain a C · S ·
Use as an analysis sample for N gas analysis. With this configuration, it is not necessary to cut out a sample for various analyzes from a truncated cone-shaped sample as in the case where the molten metal is pumped up and sampled in a conventional cup-shaped small container. Further, as described above, the analysis surface is easily polished, and the lower part of the obtained sample is extremely thin, so it is possible to easily punch out the sample for gas analysis using a simple punch. The sample preparation performed later can be performed in a short time. As a result,
The time required for analysis and labor can be reduced, and the manufacturing system itself can be operated smoothly. In addition, as the uneven shape forming the hollow portion of the sample mold 1 that can be used in the present invention, in the above description, a so-called lollipop type sample is obtained when the sample mold 1 is split after solidification. For example, as shown in FIGS. 4 (b) and 4 (c), it is also possible to use a disc type or a bomb type sample. Further, it goes without saying that the present invention is not limited to these.

Next, the small container 2 in which the sample mold 1 having the above-mentioned structure is housed will be described. Small container 2 which is a constituent member of the molten metal sampling apparatus according to the present invention
Is made of a metal such as iron having a thickness of about 5 to 10 mm or a material such as heat resistant ceramic so as not to be immediately dissolved when immersed in a molten metal bath. The shape of the small container 2 is cup-shaped in the example shown in FIG. 1, but the shape is not limited to this and may be any shape as long as the sample mold 1 can be conveniently stored.

In order to easily and stably store the sample mold 1 in the small container 2 and to smoothly introduce the molten metal into the hollow portion of the sample mold 1, the shape of the small container 2 is defined as follows.
In order to easily store the sample mold 1, it is necessary to have a state in which at least the upper part is wide open and to have a shape having an opening 8 for inserting the sample introduction part 7 of the sample mold 1 at any position. is there. For example, in the example shown in FIG. 1, an opening 8 is provided at the center of the bottom of the cup-shaped small container 2, and the sample introducing portion 7 provided at the bottom of the sample mold 1 is provided in the opening 8.
Is detachably fitted and the sample mold 1 is stably held in the small container 2. Further, a through hole 9 is required to be formed on the side surface of the small container 2 so that the gas emitted from the small hole 12 provided in the sample mold 1 can be exhausted to the outside.

Further, the open portion of the upper portion of the small container 2 can be in a sealed state so that the molten metal does not enter through the opening when the small container 2 is immersed in the molten metal bath. Similarly, it is necessary to provide a detachable and sealable lid. The lid is made of the same material as the small container 2 and is adhered with cement or the like after housing the sample mold 1. According to this aspect, when the small container 2 is immersed in the molten metal bath, the lid does not come off and the molten metal does not enter the small container 2 from above, while the sample mold 1
After the molten metal filled in the hollow portion of the container is pulled up and cooled, as shown in FIG. 2, when the small container 2 is turned upside down, the lid easily comes off and falls, and the metal is filled with it. The sample mold 1 that has been carried out easily falls from the inside of the small container 2. As a result, a sample in which the molten metal is solidified can be easily obtained.

Next, the support rod 3 which constitutes the sampling device according to the present invention will be described. The small container 2 in which the sample mold 1 is housed inside is supported by a supporting rod 3 which is held by a hand or, in the case of an automatic sampling device, by a robot. The small container 2 is immersed in the molten metal bath by moving the small container 2 onto the bath containing the molten metal and then moving the support rod 3 downward. As a result, the molten metal in the bath is introduced into the hollow portion of the sample mold 1 contained in the small container 2. Like the cup-shaped small container 2, the support rod 3 is made of a metal such as iron or a material such as heat-resistant ceramic, and its shape is a solid rod as shown in FIGS. 1 and 2. It may be a hollow tubular one. The gas exhausted from the small hole 12 in the upper part of the sample mold 1 is exhausted through the through hole 9 provided in the side wall of the cup-shaped small container 2. At this time, the gas is exhausted into the air. In order to do so, as shown in FIG. 3, if the support rod 3 is made tubular and the through hole 9 and this pipe are connected, the gas that has passed through the through portion 9 is inside the support rod. Easily exhausted through to the air.

As another method for exhausting the gas into the air, the paper tube 1 formed of thick paper around the support rod 3 is used.
0 is provided and the diameter of the paper tube 10 is made larger than the diameter of the support rod 3 to form a gap between the paper tube 10 and the support rod 3, and the upper portion of this gap is in the air. If the paper tube 10 and the support rod 3 are configured so as to exist in, the gas can be easily exhausted into the air. The paper tube 10 is formed of paper such as cardboard having a size of about 1 to 5 mm so as not to burn immediately and prevent the molten metal from scattering when immersed in the molten metal bath. It is preferable to apply a heat resistant ceramic to the surface of the.

[0022]

EFFECTS OF THE INVENTION According to the present invention, a solidified sample can be easily taken out and post-treatment of the obtained sample is performed, for example, cutting out of a sample for analysis, punching out of the sample, cutting of a runner, or analysis. It can facilitate sample preparation such as polishing of the surface, and can simultaneously obtain samples with different shapes that match various analytical purposes or analyzers with one operation, suitable for automation of sampling and work Provided is a simple molten metal sampling device capable of achieving labor saving.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an example of a molten metal sampling device according to the present invention.

FIG. 2 is a conceptual diagram when a sample is taken out after the sample is taken by the molten metal sample taking device according to the present invention.

FIG. 3 is a vertical cross-sectional view showing another example of the molten metal sampling apparatus according to the present invention.

FIG. 4 is a diagram showing an example of the shape of a sample obtained by the molten metal sampling apparatus according to the present invention.

FIG. 5 is a vertical cross-sectional view showing an example of a conventional molten metal sampling device.

[Explanation of symbols]

 1: Sample type 2: Small container 3: Support rod 4: Metal lid 5: Lid 6: Dent 7: Sample introduction part 8: Open hole part 9: Through hole 10: Paper tube 11: Quartz tube 12: Small hole 13: Stopper

Claims (6)

[Claims] 1. A molten metal sampling device comprising a small container having a detachable lid, a support rod for supporting the container, and a sample mold housed in the small container, wherein the sample mold comprises:
It has at least a hollow portion filled with molten metal in an arbitrary shape, a sample introduction portion for introducing the molten metal into the hollow portion, and a vent hole for exhausting gas from the hollow portion when the molten metal is introduced. In addition, an opening is provided in the bottom or side wall of the small container for detachably fitting the sample introduction part of the above-mentioned sample mold, and the side wall of the small container is further provided with an opening for exhausting air in the small container to the outside. A molten metal sampling device characterized in that a through hole is provided, and an air flow path connected to the through hole is provided in or near the support rod. 2. An air flow passage is provided inside or between the support rod and a paper tube arranged around the support rod and having a diameter larger than that of the support rod. The molten metal sampling device described. 3. The sample introducing part is made of a metal or a heat-resistant ceramic material and is provided in the lower part or the upper part of the sample mold, and a quartz tube is inserted inside the sample introducing part. One of the ends of the quartz tube is longer than the sample introduction part formed of a metal or a heat-resistant ceramic material, and has a length such that the quartz tube end can be inserted into the molten metal, and the tip is made of a metal lid. The molten metal sampling device according to claim 1, further comprising: 4. The molten metal sampling device according to claim 1, wherein the hollow portion of the sample mold for filling with the molten metal is formed of two halves or three or more divided bodies. 5. The molten metal sampling device according to claim 1, wherein the thickness of the hollow portion of the sample mold is different at least in the upper and lower portions. 6. A molten metal sampling apparatus according to claim 1, wherein a small container of the molten metal sampling apparatus is dipped in the molten metal and melted from a sample introduction part of the sample mold housed in the small container to a hollow part of the sample mold. After injecting metal to fill the hollow part with molten metal, pull up the small container from the container containing the molten metal, cool, and then invert the small container to make a sample mold filled with molten metal. A method of sampling a molten metal, which comprises dropping the sample together with the lid of the small container from the inside of the small container.