KR100450525B1 - Sampler for picking molten steel sample - Google Patents

Abstract

The present invention relates to an improvement of a sampler that enables to detect information such as temperature of molten metal, dissolved oxygen, and component elements in a steelmaking process of producing stainless steel. In the sampler having a sampling portion made of a basement in communication with the loss through the water flow in which the molten steel sample is stored; The runway extends upwardly into a truncated cone shape lower than the center of the ball, and the outer circumferential surface of the runway is formed to be inclined toward the side of the ball from the inner wall surface of the loss, or the runway extends upwardly lower than the center of the ball. It is formed to be inclined downward from the inner wall surface of the loss toward the spout, and the stepped locking jaw is formed on the inner circumferential surface of the ballway at a distance from the lower end thereof.

According to the present invention, since unnecessary components are not generated by the molten metal remaining in the sample during sample collection, no pretreatment process is required, and thus the work efficiency is improved, and the pretreatment process is unnecessary, thus ensuring the safety of the work and transferring to the analysis chamber. This can be done quickly, allowing for a sound analysis, allowing for a quick and accurate analysis.

Description

Sampling Sampler {SAMPLER FOR PICKING MOLTEN STEEL SAMPLE}

The present invention relates to a sampler used in the steelmaking process, and more particularly, to an improvement of a sampling sampler that makes it possible to detect information such as molten metal temperature, dissolved oxygen, and component elements in a stainless steel production process. .

In general, PROBE is used to measure components, temperature, dissolved oxygen, etc. of molten steel during the steelmaking process of steel mills.

1A, the probe is inserted into and fixed to the lower end of the main branch tube 1 as shown in FIG. 1A, and a sample collection part is formed inside the main branch tube 1 adjacent to the upper side of the temperature chamber element 2. 3) It is composed of a structure equipped with a immersion in molten steel in various refining furnaces (electric converter, electric furnace, LF, AOD, VOD, LT, VTD, RH-OB, B / B, etc.) during the steelmaking process to take the sample Or the temperature of molten steel, dissolved oxygen in molten steel, etc. are measured.

By the way, in the case of the sampling part 3 for collecting the sample of molten steel, as shown in (a) and (b) of FIG. 1b, the loss chamber 10 in which the molten metal 12 which the molten metal flows in is formed, and the said loss ( 10 is connected to each other horizontally and the base 20 having the water flow 22 in communication with each other horizontally so that the melt flows into the chamber 10 when the probe is immersed and taken out of the molten metal is solidified in Figure 2 As shown in the example, an unnecessary portion (30, 30 ', 30 ") of the sample (S), which is a part necessary for analysis, appears in the fuselage.

Therefore, in order to send the sample (S) to the analysis chamber, the sample (S) must be loaded into a transfer means called a carrier. In this case, the unnecessary portion (30, 30 ', 30 ") cannot be charged into the carrier. Therefore, it is necessary to go through a pretreatment process to remove the unnecessary parts (30, 30 ', 30 ").

In this pretreatment process, a cutting tool is applied several times using a blow tool to remove unnecessary dust (30, 30 ', 30 ") or a cutting operation is performed using a cutter when cutting is not easy. .

Accordingly, the weighting of the work load as well as the delay time according to the pretreatment process of the sample (S) is generated, the refining proceeds in a state in which the components of the molten steel are not confirmed, so that the generation of metal oxides is high and the quality of the steel is deteriorated accordingly. In addition, since the cutting operation must be performed in a red state, the ceramic pieces, which are materials forming the loss 10, are scattered, thereby causing a safety problem of harming the worker.

In addition, if the sample (S) is exposed to air for a long time, it causes component deviations due to surface oxidation, segregation and coagulation, thereby deteriorating the value as the sample (S).

In particular, in the case of stainless steel, since the thermal conductivity is only 1/5 of that of general steel, the probe is not completely solidified until the probe comes out of the molten metal, and the center of the sample S remains as a solid and liquid coexisting region. When the probe comes out of the molten metal, the molten metal remaining in the upper chamber 10 solidifies before the basement 20, and the remaining portion of the molten metal that is not completely discharged from the upper chamber 10 is unnecessary (30, 30 ', 30 "). In this case, the air (GAS) contained in the coagulation delay portion of the basement 20 is solidified without being discharged by the unnecessary fractions 30, 30 ′, 30 ″ of the loss 10 that has been solidified first. The soundness of (S) is significantly lowered.

In order to minimize this phenomenon, as shown in (a) of FIG. 1B, a mold was formed in the form of a dotted line 24 so that the central portion of the sample S solidified quickly, but this was also unnecessary due to the remaining molten metal in the loss 10. The production of the powders 30, 30 ', 30 "could not be suppressed, which did not solve the disadvantage that an additional pretreatment process resulting from the removal and removal of unnecessary powders had to be accompanied.

In addition, in order to ensure the integrity of the sample at the time of sampling, the sample was collected by adding a deoxidizer 26 such as Al, Ti, Zr as shown in (b) of FIG.

The present invention has been made in view of the above-described problems of the prior art as described above, and created to solve this, by adjusting the thickness and size of the mold so that sufficient coagulation of the sample introduced into the basement so that coagulation is made quickly in the basement In case of loss, the temperature drop is made less, ensuring the integrity of the sample and preventing segregation due to directional coagulation, and matching the shape of the sample to the carrier so that it can be transferred directly to the analysis room without pretreatment. The aim is to provide a sampling sampler that can improve the accuracy of the analysis and ensure the safety of the work.

Figure 1a, b is a partial cross-sectional view of the probe and the sampler showing the installation state of the sample collection portion for sampling according to the prior art and an enlarged cross-sectional view of the sample collection portion,

2 is a partial perspective view showing an example of a sample collected according to the prior art,

3 is an enlarged cross-sectional view of a sample taking part for sampling according to a first embodiment of the present invention;

Figure 4 is an enlarged cross-sectional view of a sample taking part for sampling according to a second embodiment of the present invention,

5 is an enlarged cross-sectional view of a sample taking part for sampling according to a third embodiment of the present invention;

6 is a perspective view showing an example of a sample collected according to the present invention;

7 is an exemplary view showing an analysis process of a sample taken in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

100: lost 110,110 ': Tanggu

200: You 210210 ': Tangdo

220: protruding jaw 230: inclined surface

240: hanging jaw 250: quartz tube

260: space portion S, S ': sample

The above object of the present invention is a sampling sampler having a sampling unit consisting of a loss having a molten steel inlet to be taken in the molten steel sample to be collected, and a chamber in which the molten steel sample is stored in communication with the loss through a water supply; The water supply is extended by a frusto-conical shape lower than the center of the ball, and the outer peripheral surface of the water flow is achieved by providing a sampler for sampling, characterized in that it is formed to be inclined toward the mouth side from the inner wall surface of the loss. do.

In addition, the above object of the present invention is a sampling sampler having a sampling portion consisting of a chamber having a molten steel in which the molten steel sample to be collected is introduced, and a chamber in which the molten steel sample is stored and communicated with the loss through the water flow In; The runway extends upwardly lower than the center of the ball, but the top surface thereof is formed to be inclined downward from the inner wall surface of the loss to the ball opening, and the stepped locking jaw is formed at a distance from the bottom of the runway. It is also achieved by providing a sampling sampler.

Hereinafter, some preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]

3 is a cross-sectional view showing a sampling unit of the sampler according to the first embodiment of the present invention.

As illustrated in FIG. 3, the sampling unit 300 inserted into the main branch pipe of the probe has a cylindrical chamber 100 having a spout 110 formed on one side thereof, and the chamber 100 of the chamber 100. Located in the lower portion is in communication with the loss 100 by the water supply 210 and is divided into a base (200) that is a mold filled with the molten metal to be collected.

The material of the loss chamber 100 is preferably ceramic (Al ₂ O ₃ -SiO ₂ ) rather than silica sand, which is to prevent pick-up of the carbon (CARBON) due to contamination. The slow heat transfer speed minimizes the temperature drop.

It is preferable that the taphole 110 is formed to be as close as possible to the basement 200, so that the molten metal collected as a sample and remaining in the chamber 100 can be easily discharged to the outside of the chamber 100 through the tub 110. To do this.

Tangdo 210 is a passage that communicates the upper chamber 100 and the lower chamber 200 so that the sample introduced into the upper chamber 100 through the mouth opening 110 is filled in the lower chamber 200.

The periphery of the runway 210 protrudes upwards to form a protruding jaw 220.

The height of the protrusion jaw 220 is preferably protruded lower than the radius of the tapping hole 110, that is, the center of the taping ball. When the protrusion jaw 220 protrudes higher than the radius of the taping hole 110, the inflow of the molten metal, which is a sample, This is because it is not easy to smoothly discharge the molten metal remaining in the loss 100 after the sampling is completed.

In particular, the protruding jaw 220 is preferably formed in a hollow truncated cone shape, that is, the thickness becomes thinner from the lower end to the upper end, and also the spout 110 from the inner wall surface of the mouth opening 110 of the loss chamber 100 It is preferable that the inclined surface 230 extends toward the side and meets the lower end of the protruding jaw 220.

The inclined surface 230 is formed to be inclined downward toward the spout 110, and the point becomes the highest point with an imaginary line meeting the diameter of the spout 110, and smoothly along the arc shape around the highest point. It is particularly preferable to be inclined downward so as to be connected to the spout 110.

As long as the inclination angle of the inclined surface 230 is within a range capable of smoothly discharging residual molten metal, it may be sufficient if the inclination angle of the inclined surface 230 is less than 90 degrees, for example, but is preferably in the range of 20 to 60 degrees.

Second Embodiment

4 is a cross-sectional view showing a sampling unit of the sampler according to the second embodiment of the present invention.

As shown in FIG. 4, the sampling unit 300 ′ is formed such that the upper chamber 100 and the lower chamber 200 have the same materials and functions as those of the first embodiment, and the opposite side of the spout 110 ′. The inner wall surface of the phosphorus loss chamber 100 is formed thicker in the range of 1/3 to 1/2 than the normal thickness.

This allows the size of the chamber 100 to be made smaller than that of the chamber 200, so that the outer diameter of the sample taken from the chamber 200 is made larger than the outer diameter of the undesired residues remaining in the chamber 100. This is to ensure the ease of introduction into the city.

In addition, the upper end surface of the ballway 210 'is formed to be inclined at a predetermined angle toward the inner wall surface (inner circumferential surface) of the upper chamber 100 from the rear end of the spout 110'.

This is to allow the molten steel remaining in the chamber 100 to be discharged to the spout 110 'easily along the slope of the top surface of the waterway 210' by its own weight when lifting the probe after sampling. In order to minimize the amount of remaining molten metal, the inclination angle is preferably equal to the angle of the inclined surface 230 in the above-described first embodiment.

In addition, the protrusion height of the protrusion jaw 220 forming the runway 210 'is also preferably raised upward within a range located below the center of the ballway as in the first embodiment.

On the other hand, the locking jaw 240 is formed at a predetermined height from the lower end of the inner circumferential surface of the protruding jaw 220, that is, the inner circumferential surface of the runway 210 '.

The latching jaw 240 allows the cylindrical quartz tube 250 to be described later to be inserted into the ballway 210 '(for compatibility).

Third Embodiment

5 is a cross-sectional view showing a sampling unit of the sampler according to the third embodiment of the present invention.

As shown in FIG. 5, the third embodiment of the present invention has the same structure as that of the above-described second embodiment, and is fixed to the hooking jaw 240 formed on the inner circumferential surface of the runway 210 ′. The quartz tube 250 is further provided.

The quartz tube 250 is manufactured to have an upper and lower length within a range where the upper end thereof is located at a position lower than the center of the ball when the quartz tube 250 is inserted into the ballway 210 ', that is, in a worse environment than in the second embodiment, that is, When the temperature of the molten steel is low and the superheat degree of the molten steel is difficult to obtain a good sample, the quartz tube 250 is provided so that the wettability with the molten steel is bad so that the molten steel solidified in the loss can be easily separated. .

In addition, as the quartz tube 250 is inserted, a space portion 260 having a predetermined size is formed in the inner wall surface portion of the upper chamber 110 ′ and the upper rear side of the quartz tube 250. It is formed along the outer circumferential surface of the pipe 250 is inclined toward the tap (110 ') side, the residual molten steel is not continuously remaining and flows down to the tap (110') side along the slope.

In addition, the mold used in the above-described first, second, and third embodiments, that is, the material forming the base 200 is preferably made of cast iron or cast steel, which is easy to process and inexpensive to ensure the integrity of the sample.

In addition, deoxidants such as Ti, Zr, and Al may be added to the loss 100 of the first, second, and third embodiments to ensure the integrity of the sample.

In addition, the sample to be collected by forming the thickness of the mold constituting the basement 200 in the first, second, and third embodiments thicker than the upper end, that is, thickened at a constant ratio from the upper end to the lower end. It is preferable to zoom so that the whole is subjected to a uniform cooling action to prevent component segregation due to directional solidification and to ensure the integrity of the sample.

The operating relationship of the present invention having such a configuration will be described with reference to the above-described drawings and FIGS. 6 and 7.

First, a description will be given of the first embodiment, the molten metal introduced into the loss chamber 100 through the molten metal 110 by the deposition in the molten metal of the probe is introduced into the chamber 200 through the turbidity 210.

When the sample, which is a molten sample, is filled in the basement 200, the molten metal is also filled in the upper chamber 100, which is an upper side of the water supply 210.

Subsequently, when the sampling unit 300 is lifted to the outside of the molten metal as the probe is drawn out, the molten metal remaining in the loss 100 is discharged through the molten iron 110 by its own weight. Since the inclined surface 230 is formed along the outer circumferential surface, most of the molten metal remaining in the upper chamber 100 is completely discharged through the pouring holes 110.

Therefore, the collected sample is maintained in the state remaining only in the runway 210 and the basement 200 is to be collected as a sample (S ') of the form as shown in FIG.

Therefore, the sample (S ') is a form that can be inserted into the sender without any special processing, and immediately inserted into the sender without a separate pre-treatment process to be transferred to the analysis chamber, so the waiting time after the sample is significantly reduced and waiting Induced segregation, surface oxidation, and component deviations are significantly reduced.

Referring to the operation relationship of the second and third embodiments, the second and third embodiments also have a similar operation relationship to those of the first embodiment.

However, in the second embodiment, when the remaining molten metal is discharged through the taphole 110 'immediately when the probe is taken out along the inclination formed on the top surface of the waterway 210', the first and second embodiments of the present invention are performed. In the embodiment, the process of discharging the residual molten metal is performed at the same time. For example, a portion of the residual molten metal is immediately discharged along a slope formed on the top surface of the waterway 210 'and the other portion is along the outer circumferential surface of the quartz tube 260. Along the inclination formed in the space portion 260 is completely discharged to the spout 110 ′.

Particularly, in the case of the third embodiment in which the quartz tube 260 is inserted, the sample S 'may be collected more soundly even in an environment worse than that of the sample collection parts 300 and 300' shown in the first and second embodiments. As described above, even though a part of the molten metal remains in the loss 100, the quartz tube 260 has a poor wettability with the molten metal, so the separation is excellent. Separating from the unit 300 "and charged to the carrier is not difficult to ensure the efficiency of the work.

In addition, the transported sample (S ') is cut from the lower end of the sample (S') from the lower end of the sample (S ') to the upper end by the cutting machine (C) and then the cut surface is in the grinding machine (G). The sample is then analyzed by an analyzer.

As described in detail above, according to the present invention provides the following effects.

First, since no unnecessary components are generated by the molten metal remaining in the loss during sampling, the pretreatment process is not necessary, thereby improving work efficiency.

Secondly, the pretreatment process is unnecessary, so the safety of the work is secured, and the transfer to the analysis chamber is quickly performed, so that the analysis in a sound state is possible, thereby enabling accurate analysis.

Third, the analysis time of the sample is shortened, thereby improving the refining efficiency of steelmaking and increasing the productivity, as well as reducing the oxidation of valuable metals, thereby reducing the cost of steelmaking.

Claims (4)

delete delete delete In the sampling sampler having a chamber having a molten steel in which the molten steel sample to be collected is introduced, and a chamber in which the molten steel sample is stored and in communication with the loss through the water flow; The runway extends upwardly lower than the center of the ball, but the upper surface thereof is formed to be inclined downward from the inner wall surface of the loss to the ball. On the inner circumferential surface of the Tangdo is formed stepped locking jaw at a distance from the bottom, Sampling sampler, characterized in that the inner circumferential surface of the ballway is inserted into a quartz tube that is caught on the locking jaw and protrudes higher than the top surface of the ballway.