KR101742078B1 - Sampling apparatus - Google Patents

Sampling apparatus Download PDF

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Publication number
KR101742078B1
KR101742078B1 KR1020150170755A KR20150170755A KR101742078B1 KR 101742078 B1 KR101742078 B1 KR 101742078B1 KR 1020150170755 A KR1020150170755 A KR 1020150170755A KR 20150170755 A KR20150170755 A KR 20150170755A KR 101742078 B1 KR101742078 B1 KR 101742078B1
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South Korea
Prior art keywords
mold
molten steel
present
shape
sample
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KR1020150170755A
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Korean (ko)
Inventor
김성줄
정순종
박종찬
장영익
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주식회사 포스코
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Priority to KR1020150170755A priority Critical patent/KR101742078B1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/12—Dippers; Dredgers
    • G01N1/125—Dippers; Dredgers adapted for sampling molten metals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/20—Metals

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The present invention provides a sampling apparatus comprising: a body extended in a height direction; a mold disposed inside the body, having a space capable of storing a melt inside, and having one or more inner surfaces; an inlet unit penetrating a lower part of the body to be connected to the mold, having a passage through which the melt is passed inside; and a cover unit detachably mounted on the inlet part on a lower side of the body. Having the identical distance between a central part and the inner surfaces, the mold collects a sample of the melt. According to the present invention, the sample of the melt is able to uniformly be solidified without varying the components in accordance with a position inside the apparatus.

Description

[0001]

The present invention relates to a sampling apparatus, and more particularly, to a sampling apparatus capable of uniformly solidifying a melt sample without any component variation according to an internal position of the apparatus.

In general, the temperature and composition of molten steel or molten steel in refining process of steelworks is an important factor that determines the quality of produced steel. Therefore, during the refining process, various sampling devices are used to sample the molten steel or molten steel.

For example, Korean Patent Publication No. 2011-0138145, US Patent No. 3646816, and German Patent Publication No. 3200010 each disclose an apparatus for sampling a metal melt. In these patent documents, there is a problem that the melt forming the sample is cooled very slowly in the sampler mold.

On the other hand, Korean Patent Laid-Open Publication No. 10-2014-0130044 discloses a sampler having a structure for rapidly cooling a sample taken using a cooling body in order to solve the problem that the melt forming the sample is cooled very slowly in the sampler mold have.

On the other hand, in order to analyze the components of the sampled sample, the surface of the sampled sample should be removed by a grinder to remove gas defects, and the exposed surface should be analyzed by a component analyzer.

Therefore, in order to facilitate the processing and analysis of the sample sample, the conventional sampler mold is generally formed in a flat plate-like cylinder structure as shown in the above patent documents.

However, if the flat plate-like cylindrical sample taken in the conventional sampler mold is rapidly cooled, for example, in a water-cooled chamber, the final solidification point of the sample is formed respectively at a plurality of positions, or the final solidification surface is formed in the two- As shown in Fig. Thus, if the final solidification point of the sample is not one but a plurality, or if the final solidification surface is formed in the sample, component segregation may occur depending on the sample position. In this case, the component analysis result according to the sample position may have an error of about 10% to 20% with respect to the initial component analysis result.

As described above, the structure of the sampler mold disclosed in the above patent documents has a problem in that, when the sample is rapidly cooled, segregation occurs at the sample position due to the shape of the sampler mold.

KR 10-2011-0138145 A US 3646816 A DE 3200010 A1 KR 10-2014-0130044 A

The present invention provides a sampling device capable of uniformly solidifying a sample of a melt without variations in the component depending on the internal position of the device.

The present invention provides a sampling device capable of suppressing or preventing the occurrence of segregation by improving the shape of the mold so that the final solidification point position becomes one point.

The present invention provides a sampling device capable of improving the reliability of analysis results.

A sampling apparatus according to an embodiment of the present invention is an apparatus for sampling a sample of a melt, comprising: a body extending in a height direction; A mold positioned inside the body and having a space capable of storing the melt therein and having at least one inner surface; An inlet connected to the mold through a lower portion of the body and having a passageway through which the melt can pass; And a cover portion detachably mounted on the inflow portion from a lower side of the body, wherein the mold is formed so that the distance between the center portion and a plurality of positions of the inner surface is the same in at least three axes directions. At this time, the melt may include molten iron, molten steel, molten steel and molten metal.

The mold has a plurality of inner surfaces, and in at least three axes directions, the molds can have the same distance between the central portion and the inner surfaces.

The inner space of the mold may be formed into a regular polyhedron. The inner space of the mold may be formed into a cubic shape.

The mold may have one inner surface, and the inner surface of the mold may include a spherical surface.

The mold may have a plurality of inner surfaces, and the inner surface may include one spherical surface and at least one more surface. Wherein the inner space of the mold is formed in a shape of an intersection space of spherical and regular polyhedrons and a width of one side of the regular polyhedron is smaller than 1 when the diameter of the sphere is 1, The distance between vertices of regular polyhedra can be greater than one.

The regular polyhedron may include a cube. When the diameter of the sphere is 1, the width of one surface of the cube may be in the range of 0.83 to 0.84.

According to the embodiment of the present invention, the shape of the mold can be improved so that the final solidification point becomes one point, thereby suppressing or preventing the occurrence of component segregation for each position of the mold. Therefore, it is possible to homogeneously solidify the sample of the melt without deviating from the internal position of the apparatus. From this, a reliable sampling analysis result can be obtained.

For example, when it is applied to a refining process or a continuous casting process of a steel mill, liquid steel contained in a converter or a mold is sampled during a refining process or a continuous casting process so as to be solidified into a sample. can do.

From this, it is possible to homogeneously solidify the sample without any deviation according to the position, and therefore occurrence of component segregation according to the internal position of the sample can be prevented. That is, a sample capable of inspecting an accurate component can be obtained.

Further, the sample can be solidified in a shape easy to fix on the shelf. From this, it is easy to perform post-treatment such as milling and grinding of the sample which has been solidified. That is, it is possible to obtain a sample having a shape easy to post-process after sampling.

As described above, it is possible to obtain a sample capable of inspecting an accurate component, and a sample having a shape easy to post-process after sampling can be obtained, so that a reliable sampling analysis result can be obtained.

1 is a view showing a sampling apparatus according to a first embodiment of the present invention.
2 is a view showing the shape of a mold according to the first embodiment of the present invention.
3 is a view illustrating a sampling apparatus according to a second embodiment of the present invention.
4 is a view showing the shape of a mold according to a second embodiment of the present invention.
5 is a view illustrating a sampling apparatus according to a third embodiment of the present invention.
6 is a view showing the shape of a mold according to a third embodiment of the present invention.
7 is a view showing a solidification process of the melt according to the first embodiment of the present invention.
8 is a view illustrating a solidification process of a melt according to a second embodiment of the present invention.
9 is a view illustrating a solidification process of a melt according to a third embodiment of the present invention.
10 is a view showing the shape of a mold and the solidification process of a melt according to comparative examples of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. In the meantime, the drawings may be exaggerated to illustrate embodiments of the present invention, wherein like reference numerals refer to like elements throughout.

FIG. 1 is a view showing a sampling device according to a first embodiment of the present invention, and FIG. 2 is a view showing the shape of a mold according to a first embodiment of the present invention. FIG. 3 is a view showing a sampling apparatus according to a second embodiment of the present invention, and FIG. 4 is a view showing a shape of a mold according to a second embodiment of the present invention. FIG. 5 is a view showing a sampling apparatus according to a third embodiment of the present invention, and FIG. 6 is a view showing the shape of a mold according to a third embodiment of the present invention.

The present invention relates to a sampling device capable of sampling a sample of various melts and can be applied to a process of sampling a melt in various industrial fields. Hereinafter, embodiments of the present invention will be described in detail with reference to a molten steel sampling device for re-sampling molten steel samples applied to various steel processes such as a steel refining process or a continuous casting process.

1, a sampling device 100A according to a first embodiment of the present invention is a device for sampling a sample of molten steel, and includes a body 110 extending in the height direction, a body 110 located inside the body 110, A mold 120A having a plurality of internal surfaces for forming the above-mentioned space therein, a mold 120A connected to the inside of the mold 120A through a lower portion of the body 110, A reflux portion 150 formed to surround at least a lower surface of the body 110, a collecting pipe 140 inserted into the inlet portion 130, A cover part 160 detachably mounted on the inflow part 130 from the lower side of the body 110, a refractory part 150 and a cover part 160. The cover part 160 is detachably attached (Not shown). At this time, the mold 120A may be a three-dimensional body having the same width, thickness, and height as the overall shape, and the distances between the center portion and the inner surfaces are formed to be equal in at least three axes passing through the center portion of the mold 120A .

Here, the center portion of the mold 120A refers to the center point of the solid body forming the inner space of the mold 120A. Of course, the center point of the solid is the center point of the solid within the error range.

The body 110 may extend in the height direction. In this case, the height direction means the longitudinal direction in Fig. The body 110 may be made of paper or pulp, and may be formed in the shape of a cylindrical body. For example, the body 110 can be manufactured by compression molding a paper or pulp material into a cylindrical shape. Accordingly, the body 110 can maintain its shape and function even when immersed in high-temperature molten steel.

Of course, the body 110 can support and support the mold 120A therein, and can be made of various materials and shapes satisfying what can withstand the high temperature of molten steel. In the embodiment of the present invention, this is not particularly limited.

The mold 120A may be located inside the body 110 and may be mounted and fixed inside the body 110, for example. The mold 120A may have a predetermined space therein for storing molten steel therein. The mold 120A serves to inject and store molten steel into the internal space. The mold 120A may be made of a plating material such as nickel (Ni) and tin (Sn) or an iron material so as not to be damaged by the high temperature of the molten steel.

The mold 120A may have a plurality of inner surfaces, and the distances between the central portion and the inner surfaces may be the same in at least three axes passing through the center portion. This is explained as follows.

The mold 120A has a distance between the central portion and the inner surface in one axial direction passing through the central portion and a distance between the central portion and the inner surface in the other axial direction passing through the central portion and a distance between the central portion and the inner surface Can be formed to have the same distance. This relationship is repeated so that the mold 120A can be formed with the same distance between the center portion and the inner surfaces in at least three axes passing through the center portion. Hereinafter, the mold 120A according to the first embodiment of the present invention will be described in more detail with reference to the drawings.

Referring to FIGS. 1 and 2, the mold 120A may have a plurality of inner surfaces, wherein the plurality of inner surfaces may have a regular polygonal planar shape. Further, in at least three axes or more directions passing through the center portion, the mold 120A can have the same distance between the center portion and the inner surfaces. At this time, the three axes passing through the center of the mold 120A may include various axes passing through the center of the mold 120A while being spaced apart from the axes by x, y, and z orthogonal to each other.

As described above, the inner space of the mold 120A may be formed in a regular polygonal shape. In particular, in the case of the first embodiment of the present invention, the inner space of the mold 120A may be formed in a cuboid shape. Accordingly, the mold 120A is symmetrical with respect to the center portion, and the intervals between the opposing sides of the mold 120A may be equal to each other, and the intervals between the opposed inner and outer vertices may be equal to each other. Further, the inner space of the mold 120A may have the same width, thickness, and height.

By the structure and shape of the square mold 120A described above, uniform heat transfer from the central portion of the mold 120A to each inner surface side of the mold 120A during the cooling process of the molten steel introduced into the mold 120A The solidification proceeds uniformly from the inner surface to the central portion side of the mold 120A and the final solidification point position of the molten steel sample can be guided to the center portion of the mold 120A. That is, the molten steel sample shows a three-dimensional behavior in which the heat transfer in the thickness direction, the heat transfer in the width direction, and the heat transfer in the height direction with respect to the center portion of the mold 120A are uniformly cooled, Lt; / RTI >

Thus, the molten steel sample whose solidification has been completed in the mold 120A can be prevented from being segregated depending on the position. That is, it is possible to obtain a molten steel sample capable of accurate component analysis.

Further, since the molten steel sample can be solidified into a cuboid shape, it can be easily fixed to a milling machine or a lathe. Therefore, it is possible to obtain a molten steel sample which is easily post-processed such as milling and grinding.

In this manner, a molten steel sample capable of inspecting the correct component can be obtained, and a molten steel sample having a shape that facilitates post-treatment after sampling can be obtained, so that a reliable sampling analysis result can be obtained.

The inlet 130 may extend in the height direction. At this time, the inflow portion 120 may be formed in the shape of various pipes such as pipes and tubes. The cross-sectional shape of the inflow portion 120 is not particularly limited. For example, the inflow portion 120 may have a circular cross-sectional shape. The inflow portion 130 may be connected to the mold 120A through the lower portion of the body 110. [ The upper end of the inflow portion 130 can communicate with the inside of the mold 120A through the lower portion of the mold 120A and the lower end of the inflow portion 130 can communicate with the lower portion of the body 110 and the first refractory portion 151 So that it can be opened on the lower surface of the first refractory 151.

A passage through which molten steel can pass may be formed in the inlet 130. An opening opened to the upper side and the lower side may be provided on the upper end and the lower end of the inlet 130, respectively. At this time, the passages formed in the inflow portion 130 may communicate with the openings provided at the upper end and the lower end of the inflow portion 130 and may be opened upward and downward. The inflow portion 130 can introduce molten steel into the mold 120A using the passage.

Meanwhile, a plurality of inflow portions 130 may be provided, and the forming position of the inflow portion 130 is not particularly limited. When a plurality of inflow portions 130 are formed, the filling speed of the molten steel can be improved and the uniformity of the inflow of molten steel can also be increased.

Referring to FIG. 1, the sampling pipe 140 may include a hollow pipe extending in the height direction. The sampling pipe 140 may be sized and shaped so as to be inserted and inserted into the passage of the inlet 130. The sampling tube 140 may be inserted into and fixed to the passage of the inlet 130 and may be located at least below the inlet 130. The upper end of the sampling pipe 140 can be opened upward to communicate with the upper portion of the passage of the mold 120A or the inflow pipe 130 and the lower end of the sampling pipe 140 can be opened downward, To the open end of the lower end of the housing. The sampling pipe 140 serves to assist the molten steel flowing into the mold 120A and may be formed of a quartz material so as not to be damaged by the high temperature molten steel.

The refractory portion 150 may be formed to surround the lower surface and the side surface of the body 110, respectively. The refractory part 150 includes a first refractory part 151 mounted on or attached to the lower surface of the body 110 and a first refractory part 152 attached or attached to the side surface of the body 110 .

The first refractory portion 151 may be formed along the bottom surface of the body 110, for example, in the shape of a disc. At this time, the first refractory part 151 may be formed to have a central hollow portion corresponding to the position of the inflow pipe 130. The first refractory portion 151 can protect the lower portion of the body 110 from the high temperature of the molten steel.

The second refractory portion 152 may be formed in the shape of a ring having a predetermined thickness and height to cover at least a part of the side surface of the body 110 and may be inserted into the side surface of the body 110. At this time, the insertion position of the second refractory portion 152 may correspond to the height of the slag and the flux formed on the upper surface of the molten steel. The second refractory portion 152 can protect the side surface of the body 110 from erosion of slag or flux. Therefore, the second refractory portion 152 can be made of refractory material resistant to erosion by slag or flux.

The cover 160 may be detachably mounted to the opening of the lower end of the inlet 130 at a lower side of the body 110. The cover portion 160 may be formed along the bottom surface of the first refractory portion 151, and may be formed in a disc shape, for example. At least the upper surface of the cover portion 160 may be formed larger than the width of the outer diameter of the inlet 130. The cover 160 may be mounted on or attached to the lower surface of the first refractory 151.

The cover portion 160 may block the lower end of the inlet portion 130 to prevent the flux or slag from being injected into the passage of the inlet portion 130 while the body 110 is immersed in the molten steel and moved to a predetermined depth have. The cover portion 1609 may be dissolved or removed in the molten steel, or may be detached and separated and removed, and the opening of the lower end of the inlet portion 130 may be opened.

The attachment portion 170 may be attached to connect the refractory portion 150 and the cover portion 160 and may detachably support the cover portion 160. [ The attachment portion 170 may be provided on a part of the surface where the cover portion 160 and the first refractory portion 151 are in contact with each other, and serves to temporarily connect these constituent portions. For example, the request part 170 may be provided on the outer circumferential surface of the cover part 160 so as to be adjacent to the upper surface edge of the cover part 160.

At least one of the attachment portions 170 may be provided and may be attached by connecting the side surface of the cover portion 160 and the lower surface of the first fireproof portion 151. The attachment portion 170 can be made of a mortar or metal material that can be easily dissolved at a high temperature and can be joined to the cover portion 160 and the first refractory portion 151 by welding or the like. The cover part 160 is attached to the first fireproof part 151 by forming the attachment part 170 along the periphery of the cover part 160 contacting the lower surface of the first fireproof part 151 by, So that the cover portion 160 can be detachably supported.

Although the first embodiment of the present invention has been described in detail with reference to FIGS. 1 and 2, the present invention can be variously configured including the second embodiment described below.

Hereinafter, a sampling apparatus 100B according to a second embodiment of the present invention will be described with reference to Figs. 3 and 4. Fig. Here, the second embodiment of the present invention will be described with reference to the configuration of the sampling apparatus 100B according to the second embodiment of the present invention, which is different from the configuration of the sampling apparatus 100A of the first embodiment of the present invention. .

In the case of the configuration of the sampling apparatus 100B according to the second embodiment of the present invention which overlaps with the configuration of the sampling apparatus 100A in the first embodiment of the present invention, its explanation will be omitted or briefly explained.

3, the sampling device 100B according to the second embodiment of the present invention is a device for sampling a sample of molten steel. The sampling device 100B includes a body 110 extending in the height direction, a body 110 located inside the body 110, A mold 120B having an inner surface for forming the space described above and a lower portion of the body 110 to be connected to the inside of the mold 120B, A reflux portion 150 formed to surround at least a lower surface of the body 110, a collecting pipe 140 inserted into the inlet portion 130, A cover part 160 detachably mounted on the inflow part 130 from the lower side of the body 110, a refractory part 150 and a cover part 160. The cover part 160 is detachably attached (Not shown). At this time, the mold 120B may be a three-dimensional body having the same width, thickness, and height as the overall shape, and the distances between the central portion and the plurality of positions of the inner surface are the same in at least three axes passing through the center portion of the mold 120B .

Here, the center portion of the mold 120B refers to the center point of the solid body forming the inner space of the mold 120B. Of course, the center of gravity is the center point within the error range.

The configuration and the manner of the body 110, the inflow section 130, the sampling tube 140, the refractory section 150, the cover section 160, and the attachment section 170 according to the second embodiment of the present invention, The structure and the manner of the body 110, the inflow section 130, the sampling tube 140, the refractory section 150, the cover section 160 and the attachment section 170 according to the first embodiment of the present invention are the same Or similar.

The mold 120B according to the second embodiment of the present invention may be located inside the body 110 and may be mounted and fixed inside the body 110, for example. The mold 120B may have a predetermined space in which molten steel can be stored. The mold 120B serves to inject and store molten steel into the internal space. The mold 120B may be made of a plating material such as nickel (Ni) and tin (Sn) or an iron material so as not to be damaged by the high temperature of the molten steel.

The mold 120B may have an inner surface continuous to one without a discontinuity, and the distances between the central portion and a plurality of positions of the inner surface may be formed to be the same. This is explained as follows.

The mold 120B has a distance between the central portion and the inner surface in one axial direction passing through the center portion and a distance between the central portion and the inner surface in the other axial direction passing through the center portion and a distance between the center portion and the inner surface Can be formed to have the same distance. At this time, each of the axes passing through the center of the mold 120B may include x-axis, y-axis and z-axis orthogonal to each other, or may include various axes passing through the center of the mold 120B while being spaced apart from the axes by a predetermined angle. This relationship is repeated so that the mold 120B in the direction of at least three axes passing through the center can be formed with the same distance between the center portion and a plurality of positions of the inner surface. Hereinafter, the mold 120B according to the second embodiment of the present invention will be described in more detail with reference to Figs. 3 and 4. Fig.

Referring to Figures 3 and 4, the mold 120B may have one inner surface, wherein the inner surface may include a spherical surface. The inner surface of the mold 120B may be formed to have the same distance from the center portion.

That is, the inner space of the mold 120B can be formed into a spherical shape. Particularly, in the case of the second embodiment of the present invention, the mold 120B can be formed into a complete sphere shape in which the distance between the inner surface and the center portion is represented by one radius value. Therefore, the inner surface of the mold 120B may be equally spaced from the center of the mold 120B.

By the structure and shape of the mold 120B realized in this manner, uniform heat transfer from the central portion of the mold 120B to each inner surface side of the mold 120B in the cooling process of the molten steel introduced into the mold 120B And when cooled, the position of the final solidification point of the molten steel sample can be directed to the center of the mold 120B. That is, the molten steel sample shows a three-dimensional behavior in which the heat transfer in the thickness direction, the heat transfer in the width direction and the heat transfer in the height direction with respect to the center portion of the mold 120B are uniformly cooled, Lt; / RTI >

Thereby, the molten steel sample whose solidification has been completed in the mold 120B can be prevented from being segregated depending on the position. That is, it is possible to obtain a molten steel sample capable of accurate component analysis.

Further, since the molten steel sample can be solidified into a spherical shape, it can be easily fixed to a milling machine or a lathe. Therefore, it is possible to obtain a molten steel sample which is easily post-processed such as milling and grinding.

In this manner, a molten steel sample capable of inspecting the correct component can be obtained, and a molten steel sample having a shape that facilitates post-treatment after sampling can be obtained, so that a reliable sampling analysis result can be obtained.

Although the second embodiment of the present invention has been described in detail with reference to FIGS. 3 and 4, the present invention can be variously configured including the third embodiment described below.

Hereinafter, a sampling apparatus 100C according to a third embodiment of the present invention will be described with reference to Figs. 5 and 6. Fig. The third embodiment of the present invention will now be described in detail with reference to the configuration of the sampling apparatus 100C according to the third embodiment of the present invention, which is different from the configuration of the sampling apparatus 100A of the first embodiment of the present invention. .

In the case of the configuration of the sampling apparatus 100C according to the third embodiment of the present invention which overlaps with the configuration of the sampling apparatus 100A in the first embodiment of the present invention, the description thereof will be omitted or briefly explained.

5, a sampling device 100C according to a third embodiment of the present invention is a device for sampling a sample of molten steel, and includes a body 110 extending in the height direction, a body 110 located inside the body 110, A mold 120C having a plurality of inner surfaces for forming the space therein, a mold 120C connected to the inside of the mold 120C through a lower portion of the body 110, A reflux portion 150 formed to surround at least a lower surface of the body 110, a collecting pipe 140 inserted into the inlet portion 130, A cover part 160 detachably mounted on the inflow part 130 from the lower side of the body 110, a refractory part 150 and a cover part 160. The cover part 160 is detachably attached (Not shown). At this time, the mold 120C may have the same width, thickness, and height as the overall shape, and the distances between the central portion and the inner surfaces are formed to be equal in at least three axes passing through the center portion of the mold 120C .

Here, the center portion of the mold 120A refers to the center point of the solid body forming the inner space of the mold 120A. Of course, the center of gravity is the center point within the error range.

The structure and the manner of the body 110, the inflow section 130, the sampling tube 140, the refractory section 150, the cover section 160 and the attachment section 170 according to the third embodiment of the present invention include the present invention The structure and the manner of the body 110, the inflow section 130, the sampling tube 140, the refractory section 150, the cover section 160 and the attachment section 170 according to the first embodiment of the present invention are the same Or similar.

The mold 120C according to the third embodiment of the present invention may be located inside the body 110 and may be mounted and fixed inside the body 110, for example. The mold 120C may have a predetermined space in which molten steel can be stored. The mold 120C serves to inject and store molten steel into the internal space. The mold 120C may be made of a plating material such as nickel (Ni) and tin (Sn) or an iron-based material so as not to be damaged by the high temperature of the molten steel.

The mold 120C may have a plurality of inner surfaces forming a space inside the mold 120C and the distances between the central portion and the inner surfaces may be equally formed in at least three axes passing through the center portion. The three axes may include an x-axis, a y-axis, and a z-axis, and may include various axes passing through the center of the mold 120C while being separated from the axes by a predetermined angle. The structure of the mold 120C will be described below.

The mold 120C has a distance between the central portion and the inner surface in one axial direction passing through the center portion and a distance between the central portion and the inner surface in the other axial direction passing through the center portion and a distance between the center portion and the inner surface Can be formed to have the same distance. Such a relationship is repeated so that the mold 120C can be formed with the same distance between the center portion and the inner surfaces in at least three axes passing through the center portion. Hereinafter, the mold 120C according to the third embodiment of the present invention will be described in more detail with reference to the drawings.

5 and 6, the mold 120C may have a plurality of inner surfaces, and the inner surface may include one spherical surface and at least one or more planes. In this case, the plane may be a circular plane or a regular polygonal plane. The spherical surface of the inner surface of the mold 120C may be formed so that the center position of the radius of curvature thereof coincides with the central portion of the mold 120C and at least one of the planes may be formed by a distance between the center position of each plane and the center portion of the mold 120C Can be formed in the same manner. That is, the inner space of the mold 10C may be formed in a shape in which the spherical shape and the polyhedral shape are combined, and the inner surface of the mold 120C may be equally spaced from the center of the mold 120C.

More specifically, the mold 120C may be formed in a space shape having an inner space corresponding to the intersection area of the spherical body and regular body. Alternatively, the mold 120C may be formed in a space shape corresponding to an area in which the spheres of the inner space are overlapped with the spheres whose center points are aligned with each other. Alternatively, the mold 120C may be formed in a space shape corresponding to an area where the inner space intersects the spherical bodies having the centers of the centers thereof intersected with each other. Alternatively, the mold 120C may be formed in a space shape corresponding to an area in which the internal space is included in both the spherical bodies and the spherical bodies having the center points thereof aligned with each other.

At this time, if the diameter of the sphere is 1, the width of the regular polygonal body may be smaller than 1, and the distance between the center of the volume of the regular polygonal body and the vertex of the regular polygonal body may be larger than one. Here, the regular polyhedron may include a cube. In this case, when the diameter of the sphere is 1, the width of one side or one side of the cube may be in the range of 0.83 to 0.84.

On the other hand, if the width of the regular polyhedron decreases with respect to the diameter of the determined sphere, the shape of the manufactured molten steel sample becomes closer to the regular polyhedron and can be more easily fixed to a milling machine, a lathe or the like. On the other hand, as the width of the regular polyhedron approaches the diameter of the sphere with respect to the diameter of the determined sphere, the shape of the manufactured molten steel sample becomes closer to the sphere, and the position of the final solidified point during cooling of the molten steel sample is shifted toward the center of the mold 120C It can be induced smoothly.

By the structure and shape of the mold 120C combined with the spherical and the square as described above, the molten steel introduced into the inside of the mold 120C from the central portion of the mold 120C, Uniform heat transfer occurs to the surface side, and when cooled, the final solidification point position of the molten steel sample can be induced to the center portion of the mold 120C. That is, the molten steel sample is cooled rapidly by showing a three-dimensional behavior in which the heat transfer in the thickness direction, the heat transfer in the width direction, and the heat transfer in the height direction are uniform with respect to the center of the mold 120C, Lt; / RTI >

Thus, the molten steel sample in which solidification has been completed in the mold 120C can be prevented from being segregated depending on the position. That is, it is possible to obtain a molten steel sample capable of accurate component analysis.

In addition, since the molten steel sample can solidify into a spherical and square combined shape, it can be easily fixed to a milling machine or a lathe. Therefore, it is possible to obtain a molten steel sample which is easily post-processed such as milling and grinding.

In this manner, a molten steel sample capable of inspecting the correct component can be obtained, and a molten steel sample having a shape that facilitates post-treatment after sampling can be obtained, so that a reliable sampling analysis result can be obtained.

FIG. 7 is a view showing a solidification process of the melt according to the first embodiment of the present invention, FIG. 8 is a view showing a solidification process of the melt according to the second embodiment of the present invention, 1 is a view showing a solidification process of a melt according to an embodiment. 10 is a view showing the shape of a mold and the solidification process of a melt according to comparative examples of the present invention.

FIGS. 7 to 9 are results obtained by collecting molten steel with the sampling apparatus according to the embodiments of the present invention, analyzing it after each solidification, analyzing the solidification progress of the molten steel sample, and showing the final solidification point at the end of solidification. At this time, a process of collecting a sample of molten steel using the sampling device and quenching it by, for example, quenching in a water-cooling chamber is a well-known technique, and thus a detailed description thereof will be omitted.

7, when the molten steel sample S A is solidified by using the sampling apparatus 100A according to the first embodiment of the present invention, the direction of solidification progressing is a plan view of Fig. 7 (a) and Fig. 7 (b) as in the side view as best seen, towards the center of the molten steel sample (a S) and to check the formed, the final solidification point may determine the center position of the molten steel formed on the sample (S a).

8, when the molten steel sample S B is solidified by using the sampling apparatus 100B according to the second embodiment of the present invention, the direction of solidification progressing is shown in a plan view of FIG. 8 (a) b), it is confirmed that it is formed toward the center position of the molten steel sample (S B ), and it can be confirmed that the final solidification point is formed at the center position of the molten steel sample (S B ).

9, when the molten steel sample S C is solidified by using the sampling apparatus 100C according to the third embodiment of the present invention, the solidification progressing direction is a plan view of FIG. 9 (a) and FIG. 9 b), it can be confirmed that it is formed toward the center position of the molten steel sample (S C ), and it can be confirmed that the final solidifying point is formed at the center position of the molten steel sample (S C ).

As described above, in the embodiments of the present invention, since the shape of the mold is improved to have the same width, thickness and height, cooling of the molten steel sample is performed in three dimensions, and the position of the final solidifying point is located at the center of the mold As shown in FIG.

On the other hand, FIG. 10 is a graph showing the solidification progress of the molten steel sample and the final solidification point at the end of solidification by collecting molten steel with the sampling apparatus according to the comparative examples of the present invention, analyzing the solidification after each solidification. At this time, the sampling device according to the comparative examples of the present invention may be a conventional sampling device.

10 (a) is a view showing a mold shape of a sampling device according to a first comparative example of the present invention, and FIG. 10 (b) is a graph showing a rapid cooling process in a mold shape according to a first comparative example of the present invention And Fig. 10 (c) is a plan view showing the final solidified surface shape in the mold shape according to the first comparative example of the present invention.

In the sampling device according to the first comparative example of the present invention, the shape of the mold 12a may be a flat disk shape. That is, as shown in the drawing, the mold 12a has the same width and height but different width and thickness, and different height and thickness. When the molten steel is sampled and solidified, for example, by rapid cooling using the mold 12a having such a shape, the thermal shock in the thickness direction is relatively strong, and as shown in Fig. 10 (b) And the direction of solidification is directed to a plurality of positions inside the molten steel sample S 12a . As described above, in the first comparative example of the present invention, the final solidification point is not formed as a single point at the center of the molten steel sample as in the embodiment of the present invention, but as shown in Figs. 10 (b) and 10 And it is confirmed that the final solidification surface is formed inside the molten steel sample S 12a in the form of a two-dimensional plane, for example, a circular plane.

10 (d) is a view showing the mold shape of the sampling device according to the second comparative example of the present invention, and FIG. 10 (e) is a graph showing the rapid cooling process in the mold shape according to the second comparative example of the present invention And Fig. 10 (f) is a plan view showing the final solidified surface shape in the mold shape according to the second comparative example of the present invention.

In the sampling device according to the second comparative example of the present invention, the shape of the mold 12b may be a flat disc shape. That is, the mold 12b is different in width, height, and thickness. When the molten steel sample S12b is rapidly solidified by using the mold 12b having such a shape, the thermal shock in the thickness direction and the width direction is relatively strong, and as shown in Fig. 10 (e) Dimensional direction and the direction of solidification is directed to a plurality of internal positions of the molten steel sample (S 12b ). Thus, in the second comparative example of the present invention, the final solidification point is not formed as a single point in the center portion of the molten steel sample as in the embodiment of the present invention, And the final solidified surface is formed inside the molten steel sample S 12b in the form of a two-dimensional plane, such as an elliptical plane.

As described above, in the comparative examples of the present invention, it can be confirmed that one final solidification point is not formed in the molten steel sample, and the final solidification surface is formed in a two-dimensional shape.

On the other hand, according to the embodiments of the present invention, it can be clearly seen that the molten steel sample can be uniformly solidified three-dimensionally along the shape of the mold so that the final solidification point can be formed at one position of the center of the mold.

It should be noted that the above-described embodiments of the present invention are for the purpose of illustrating the present invention and not for the purpose of limitation of the present invention. The present invention may be embodied in various forms without departing from the scope and range of equivalents of the claims. Further, the technical idea of the embodiments of the present invention may be implemented by being combined or crossed each other in various ways. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

110: body 120A, 120B, 120C: mold
130: inlet portion 160: cover portion

Claims (9)

An apparatus for sampling a sample of melt,
A body extending in the height direction;
A mold positioned inside the body and having a space capable of storing the melt therein and having at least one inner surface;
An inlet connected to the mold through a lower portion of the body and having a passageway through which the melt can pass;
A quartz sampling tube inserted into the passage of the inlet to introduce the melt into the mold; And
And a cover part detachably mounted on the inflow part from a lower side of the body,
A plurality of the inflow portions are formed so as to increase the uniformity of the melt during the inflow,
Wherein the mold is a three-dimensional body having the same width, thickness, and height as the overall shape, and at least three axes passing the center point of the three-dimensional body forming the inner space of the mold have the same distance between the center point and the inner surface of the mold In addition,
Wherein the axes include x-axis, y-axis, z-axis orthogonal to each other, and an axis passing the center point while being spaced apart from the axis by a predetermined angle. The method according to claim 1,
Wherein the mold has a plurality of inner surfaces,
Wherein in at least three axes directions, the mold is configured such that distances between the central portion and the inner surfaces are the same. The method of claim 2,
Wherein the mold is formed in a cubic shape in an inner space. The method according to claim 2 or 3,
Wherein the mold has an internal space formed in a cuboid shape. The method according to claim 1,
The mold having one inner surface,
Wherein said inner surface comprises a spherical surface. The method according to claim 1,
Wherein the mold has a plurality of inner surfaces,
Wherein the inner surface comprises one spherical surface and at least one plane. The method according to claim 1 or 6,
Wherein the mold is formed in a shape of an intersection space of spherical and regular polyhedrons,
Wherein a diameter of the sphere is 1 and a width of one side of the regular sphere is less than 1 and a distance between a position of a center of volume of the regular sphere and a vertex of the regular sphere is greater than one. The method of claim 7,
Wherein the regular polyhedron includes a cube. The method of claim 8,
And the diameter of the sphere is 1, the width of one side of the cube is in the range of 0.83 to 0.84.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002022732A (en) 2000-07-04 2002-01-23 Nkk Corp Molten metal sample sampling device and molten metal sample sampling method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002022732A (en) 2000-07-04 2002-01-23 Nkk Corp Molten metal sample sampling device and molten metal sample sampling method

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