KR101779987B1 - Sampling device and complex probe including the same - Google Patents
Sampling device and complex probe including the same Download PDFInfo
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- KR101779987B1 KR101779987B1 KR1020150189923A KR20150189923A KR101779987B1 KR 101779987 B1 KR101779987 B1 KR 101779987B1 KR 1020150189923 A KR1020150189923 A KR 1020150189923A KR 20150189923 A KR20150189923 A KR 20150189923A KR 101779987 B1 KR101779987 B1 KR 101779987B1
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- KR
- South Korea
- Prior art keywords
- molten metal
- outlet
- inlet
- sampler
- passage
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4673—Measuring and sampling devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- 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
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/2202—Preparing specimens therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
-
- 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
-
- G01N33/206—
-
- 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
- G01N2001/1031—Sampling from special places
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Fluid Mechanics (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
According to an embodiment of the present invention, the sampler which is immersed in molten metal and into which the molten metal can flow is formed at one side of the sampler, and the molten metal is formed at the other side of the sampler, An upper mold having an upper chamber formed between the hot sprue and the hot sprue; A casting mold connected to the casting mold and having a lower chamber filled with a molten metal flowing out through the casting mold through an open side; And a moving member provided between the bathtub and an opened side of the mold to provide the passage from the bathtub to the doorway, the passage including an inlet adjacent to the bathtub and an outlet adjacent to the bathtub, And a connecting port located between the inlet and the outlet and having a minimum cross-sectional area.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sampler and a composite probe having the sampler, and more particularly, to a sampler including a moving member that provides a path connecting a loss and a beat, and a composite probe having the sampler.
Generally, in a steel mill refining process, a composite probe equipped with a sampler is immersed in a molten metal to conduct a sample collection operation for temperature measurement, surveying, and component analysis.
For example, in the stainless steel refining (AOD) process, a high temperature (1600 to 1800 ° C) of molten metal is produced as a large amount of oxygen is blown to oxidize carbon. Particularly, in order to confirm the temperature and components in the oxidizer, the temperature is measured and sampled by using a sub-lance probe. The temperature at which the molten metal flows into the sampler is 1700 to 1800 ° C., but the solidification temperature is low : About 1490 ° C, sts.304: about 1450 ° C) It takes a long time to solidify. In addition, the molten metal of stainless steel has a large superheating degree (DELTA T) of the molten metal and a low thermal conductivity of 1/4 of that of the carbon steel, so that the solidifying time becomes longer, resulting in frequent occurrence of solidification defects.
In addition, ferromanganese (Fe-Mn) has a temperature exceeding 1,800 占 폚 at the time of oxidation in the production process. However, when the standard of Fe-70% Mn is used, the coagulation temperature is about 1170 ° C., and the superheating degree (ΔT) of the molten metal is larger than that of stainless steel having a superheating degree of about 300 ° C.
<Note: Example of calculation method of theoretical solidification temperature>
℃ /% = Decomposition temperature falling when 1% of component (C, Mn, Cr or Ni)
□ STS (304: 18Cr-8Ni) Solidification temperature:
1560 占 폚 (solid iron solidification temperature) - 63 占 폚 (27 + 32 + 3.8) - 17 占 폚 (other component) = about 1,450 占 폚
□ Fe-70% Mn Solidification temperature:
1536 캜 - 354 캜 (350 + 3.8) - 12 캜 (other component) = about 1,170 캜
* STS 304 Melted water superheat (ΔT) = 1,750 ° C (measured temperature) - 1,450 ° C = 300 ° C (STS 304)
(Fe-70% Mn) - 1,700 ° C = 580 ° C (Fe-70% Mn)
It is an object of the present invention to improve the sampling success rate in the refining process (AOD or converter) of a steel type (stainless steel, Fe-Mn, Fe-Si, etc.) To provide a probe.
Another object of the present invention is to provide a sampler and a composite probe having the sampler, which can improve the productivity in the refining process through more accurate analysis of molten metal information by ensuring the soundness of the sample by adjusting the cooling rate of the molten metal There is.
Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.
According to an embodiment of the present invention, the sampler, which is immersed in molten metal and into which the molten metal can flow, is formed on one side of the sampler, which is immersed in molten metal and into which the molten metal can flow, A molten metal mold formed on the other side of the molten metal and having a molten metal outlet, and a lower mold formed between the molten metal and the molten metal; A casting mold connected to the casting mold and having a lower chamber filled with a molten metal flowing out through the casting mold through an open side; And a moving member disposed between the chamber and the chamber to provide a passage from the chamber to the chamber, wherein the passage includes an inlet adjacent to the bath and an outlet adjacent to the bath, and an outlet between the inlet and the outlet And has a connector having a minimum cross-sectional area.
The inner circumferential surface of the passage may be inclined inward toward the connecting port from the inlet, and may be inclined outward from the connecting port toward the outlet.
The diameter of the passage may progressively decrease from the inlet toward the connector and gradually increase from the connector toward the outlet.
The bath temperature may be greater than the connection and have a smaller diameter than the inlet and the outlet.
The connector may be closer to the inlet than the outlet.
The moving member may be made of ceramic or metal.
The passage may be symmetrical about a center axis parallel to the longitudinal direction of the body and the loss.
The sampler may further include a filter provided between the sprue and the bath.
The sampler may further include a denitration agent, which is interposed between the samplers and contains titanium and aluminum.
Wherein the denitrifying agent comprises: a cylindrical coil; And a rectangular flat plate which is bent at the center of the long side and mounted in the center of the coil in a state of being divided into two halves and forms a triangular cross section having the divided portions as both sides.
According to an embodiment of the present invention, a composite probe includes: a main tube capable of introducing the molten metal into an interior through an opening formed in a side in a state of being immersed in molten metal; And a sampler which is built in the main pipe and into which the molten metal can flow, the sampler being formed at one side to form a sprue to which the molten metal flows and a sprue formed at the other side, A loss casting mold having an upper chamber formed between the hot sprue and the hot sprue; A casting mold connected to the casting mold and having a lower chamber filled with a molten metal flowing out through the casting mold through an open side; And a moving member provided between the bathtub and an opened side of the mold to provide the passage from the bathtub to the doorway, the passage including an inlet adjacent to the bathtub and an outlet adjacent to the bathtub, And a connecting port located between the inlet and the outlet and having a minimum cross-sectional area.
According to an embodiment of the present invention, the object of the present invention is to improve the sample collection success rate in the refining process (AOD or converter) of a steel type (stainless steel, Fe-Mn, Fe-Si, etc.) Further, by adjusting the cooling rate of the molten metal, the integrity of the sample can be ensured and the productivity in the refining process can be improved through more accurate analysis of molten metal information.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded view schematically showing a composite probe; FIG.
2 is a cross-sectional view schematically showing a sampler according to an embodiment of the present invention.
3 is a cross-sectional view schematically showing a sampler according to another embodiment of the present invention.
Figs. 4 and 5 are photographs showing the denitrifying agent shown in Fig. 3. Fig.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded view schematically showing a composite probe; FIG. The
The main branch pipe (11) is generally formed of a branch pipe, and the sampler (30) is mounted inside the main branch pipe (11). The main branch pipe (11) has an opening (12) through which molten metal such as molten steel flows. The
The
Heat-resistant cement (not shown) is used for adhesion between the opening 12 and the
At this time, the
2 is a cross-sectional view schematically showing a sampler according to an embodiment of the present invention. A plurality of
The
The
2, the moving
The connecting
As the molten metal moves from the
On the inner circumferential surface of the passage leading from the connecting
Particularly, due to the moving member formed by the inclined lower surface, the filling of the molten metal is increased, so that the solidification of the upper surface is delayed compared to the conventional method. Accordingly, It is possible to prevent defects such as bubbles due to gas inside the sample. The moving
On the other hand, although the conventional tongue-and-groove molding was made of silica-based cement, there were cases where the diameter was decreased according to skill of the operator. In order to solve this problem and to minimize the contamination of the analytical sample, it is preferable that the above-described sprue case 400 is designed with alumina material and attached. As a result, sample filling can be improved by stable introduction of molten metal.
FIG. 3 is a cross-sectional view schematically showing a sampler according to another embodiment of the present invention, and FIGS. 4 and 5 are photographs showing the denitration agent shown in FIG.
When producing high-nitrogen stainless steels, the solubility of nitrogen is increased as high as 0.1 wt%, causing bubble defects in the analytical sample. Therefore, it is preferable to use titanium (Ti) and aluminum (Al), which have high affinity with nitrogen, as the
As shown in Figs. 3 to 5, the denitrifying
Although the present invention has been described in detail by way of preferred embodiments thereof, other forms of embodiment are possible. Therefore, the technical idea and scope of the claims set forth below are not limited to the preferred embodiments.
13: filter 20: sensor part
22: connector 23: holder
30: Sampler 31:
32: Loss 33: Tangdo
34: Being 50: Moving member
51: inlet 52:
53: Exit
Claims (14)
A molten metal formed on one side of the molten metal and a molten metal outlet formed on the other side of the molten metal, the molten metal being formed between the molten metal and the molten metal to temporarily store the molten metal, , Ceramic mold;
A casting mold disposed to face the casting mold of the casting mold and having a lower chamber filled with a molten metal flowing out through the casting mold through an open side thereof; And
And a moving member made of a metal material and provided between one side of the mold and an open side of the mold to be provided with a passage extending from the chamber to the other side along one direction,
Said passage having an inlet adjacent to said bath, an outlet adjacent to said outlet, and a connection having a minimum cross-sectional area located between said inlet and said outlet, wherein an inner peripheral surface of said passage is inclined inward toward said connection from said inlet, Outwardly inclined toward the outlet,
Wherein the height of the beard according to the one direction is greater than the height of the passage along the one direction and greater than the maximum width of the beard.
Wherein the bath has a diameter greater than the mouth and smaller than the mouth and the outlet.
Wherein the connector is closer to the inlet than the outlet.
Wherein the passage is symmetrical about a center axis parallel to the longitudinal direction of the body and the loss.
Wherein the sampler further comprises a filter installed between the sprue and the bath.
Wherein the sampler further comprises a denitrifying agent interposed in the well and comprising titanium and aluminum.
The denitrifying agent is,
Cylindrical coil; And
And a rectangular flat plate which is mounted on the center of the coil in a state of being bent in half with respect to the center of the long side and forms a triangular cross section with both sides divided into two sides.
A sampler that is embedded in the main pipe and into which the molten metal can flow,
Wherein the sampler comprises:
A molten metal formed on one side of the molten metal and a molten metal outlet formed on the other side of the molten metal, the molten metal being formed between the molten metal and the molten metal to temporarily store the molten metal, , Ceramic mold;
A casting mold disposed to face the casting mold of the casting mold and having a lower chamber filled with a molten metal flowing out through the casting mold through an open side thereof; And
And a movable member provided between the tub and an open side of the mold to be provided with a passage extending from the chamber to the chamber along the longitudinal direction of the main tube,
Said passage having an inlet adjacent to said bath, an outlet adjacent to said outlet, and a connection having a minimum cross-sectional area located between said inlet and said outlet, wherein an inner peripheral surface of said passage is inclined inward toward said connection from said inlet, Outwardly inclined toward the outlet,
Wherein the height of the main tube along the longitudinal direction of the main tube is larger than the height of the passage along the longitudinal direction of the main tube and is larger than the maximum width of the main tube.
Wherein the bath has a diameter greater than the connection and smaller than the inlet and the outlet.
Wherein the connector is closer to the inlet than the outlet.
Wherein the sampler further comprises a denitration agent interposed in the well and comprising titanium and aluminum,
The denitrifying agent is,
Cylindrical coil; And
And a rectangular flat plate which is mounted on the center of the coil in a state of being bent in half with respect to the center of the long side and forms a triangular cross section having both sides divided into two sides.
Priority Applications (1)
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KR1020150189923A KR101779987B1 (en) | 2015-12-30 | 2015-12-30 | Sampling device and complex probe including the same |
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KR1020150189923A KR101779987B1 (en) | 2015-12-30 | 2015-12-30 | Sampling device and complex probe including the same |
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KR20170079410A KR20170079410A (en) | 2017-07-10 |
KR101779987B1 true KR101779987B1 (en) | 2017-09-19 |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100716067B1 (en) * | 2005-12-12 | 2007-05-09 | 우진 일렉트로나이트(주) | Sampling device for probe |
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- 2015-12-30 KR KR1020150189923A patent/KR101779987B1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100716067B1 (en) * | 2005-12-12 | 2007-05-09 | 우진 일렉트로나이트(주) | Sampling device for probe |
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