KR20160149668A - Molten metal measuring apparatus for preventing adhesive impurities - Google Patents

Molten metal measuring apparatus for preventing adhesive impurities Download PDF

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Publication number
KR20160149668A
KR20160149668A KR1020150087139A KR20150087139A KR20160149668A KR 20160149668 A KR20160149668 A KR 20160149668A KR 1020150087139 A KR1020150087139 A KR 1020150087139A KR 20150087139 A KR20150087139 A KR 20150087139A KR 20160149668 A KR20160149668 A KR 20160149668A
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KR
South Korea
Prior art keywords
lance
measuring
molten steel
outside
gas
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KR1020150087139A
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Korean (ko)
Inventor
이창오
김종덕
조종오
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현대제철 주식회사
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Priority to KR1020150087139A priority Critical patent/KR20160149668A/en
Publication of KR20160149668A publication Critical patent/KR20160149668A/en

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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • 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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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

Disclosed is a molten steel measuring apparatus for preventing adhesion of an impurity. A molten steel measuring apparatus for preventing impurity adhesion according to the present invention comprises: a lance portion provided to face molten steel contained in a converter; a measuring portion coupled to the lower portion of the lance portion so as to surround the lance portion; And a shielding portion for spraying gas to the outside of the boundary where the measuring portion is in contact with the lance portion to prevent impurities from adhering to the outside of the measuring portion.

Description

TECHNICAL FIELD [0001] The present invention relates to a molten steel measuring device for preventing impurities from adhering,

The present invention relates to a molten steel measuring apparatus for preventing the adhesion of impurities, and more particularly, to a molten steel measuring apparatus for preventing impurities from adhering to molten steel between a measuring unit and a lance unit.

Generally, the molten steel from the blast furnace is transferred to the converter, and the impurity elements in the molten steel are removed through oxidative refining. The measuring device settled to the inside of the molten steel measures the temperature and the composition of the molten steel in real time.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2014-0052608 (titled as "Probe and method for analyzing molten metal components using the same," published on Apr.

According to an embodiment of the present invention, there is provided a molten steel measuring device for preventing the adhesion of impurities, which can prevent molten steel from penetrating between the measuring part and the lance part to generate impurities.

A molten steel measurement apparatus for preventing adhesion of an impurity according to the present invention comprises: a lance section provided to face a molten steel contained in a converter; a measurement section for measuring a temperature and a component of the molten steel and fixed to the outside of the lance section; And a shielding part for spraying gas to the outside of the boundary where the measuring part is in contact with the lance part to prevent impurities from adhering to the outside of the measuring part.

Preferably, the lance portion includes a lance body having a hollow portion on the inner side and extending in the longitudinal direction, and a coupling protrusion protruding from the lance body and inserted into the measurement portion and having a smaller diameter than the lance body.

In addition, the measurement unit may include a connector unit having a mounting groove for inserting the connection protrusion and surrounding the outside of the lance body, a measurement body extending from the connector unit and having a connection hole on a side surface thereof, And a first measuring unit for measuring a component of molten steel moved to the inside of the measuring body through the connecting hole.

Preferably, the measuring unit further includes a second measuring unit provided outside the measuring body for measuring the temperature of the molten steel.

The shielding portion may include a shielding body provided in a shape to surround the outside of the lance portion, a channel portion that forms a passage through which the gas moves along the inside of the shielding body, and a gas And a discharge guide portion for guiding the discharge of the discharge gas.

It is preferable that a plurality of the jetting guide portions are connected to the flow path portion, the upper side is connected to the flow path portion, and the lower side is connected to the lower side of the blocking body.

It is also preferable that the jetting guide portion is inclined from the upper side connected to the flow path portion toward the lower side.

It is also preferable that the lower end of the cut-off body protrudes to the outside of the lance body and contacts the upper end of the connector portion.

The molten steel measuring apparatus for preventing impurity adhesion according to the present invention is provided with a cutoff portion at the boundary between the lance portion and the measuring portion to prevent the molten steel from moving between the measuring portion and the lance portion.

FIG. 1 is a cross-sectional view schematically showing a state in which a molten steel measuring apparatus for preventing the adhesion of impurities is installed according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing a configuration of a substantial part of an apparatus for measuring impurities adhesion according to an embodiment of the present invention.
3 is a cross-sectional view schematically illustrating a state in which a measuring unit is separated from a lance unit according to an embodiment of the present invention.
4 is a perspective view illustrating a cut-away portion according to an embodiment of the present invention.
5 is a bottom view of the blocking portion according to one embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a molten steel measuring apparatus for preventing adhesion of impurities according to an embodiment of the present invention will be described with reference to the accompanying drawings. For convenience of explanation, the molten steel measuring device for preventing the adhesion of impurities to measure the molten steel of the steel making plant will be described as an example. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Further, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a cross-sectional view schematically showing a state in which a molten steel measuring apparatus for preventing impurities adhering according to an embodiment of the present invention is installed. FIG. 2 is a perspective view schematically showing the essential constitution of the impurity adhesion preventing molten steel measuring apparatus according to an embodiment of the present invention. FIG. 3 is a cross-sectional view schematically showing a state in which a measurement unit is separated from a lance unit according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of a cutout according to an embodiment of the present invention, And FIG. 5 is a bottom view of the blocking portion according to an embodiment of the present invention.

1 and 2, a molten steel measuring apparatus 1 for preventing adhesion of an impurity according to an embodiment of the present invention includes a lance section 20 installed toward a molten steel 12 contained in a converter 10, A measuring unit 30 coupled to the lance unit 20 so as to surround the lower part of the lance unit 20 and measuring the temperature and the composition of the molten steel 12 and a measuring unit 30 fixed to the outside of the lance unit 20, (40) for spraying gas to the outside of the boundary with the measurement section (30) to prevent impurities from adhering to the outside of the measurement section (30).

The molten steel 12 from the blast furnace is transferred to the converter 10 and supplies high pressure oxygen to the molten steel 12 in the converter 10 to remove impurities in the molten steel 12.

The lance portion 20 is formed in a bar shape and is vertically movable toward the molten steel 12 contained in the converter 10. The measurement section 30 is provided below the lance section 20 and the lower part of the measurement section 30 is settled on the molten steel 12 by the upward and downward movement of the lance section 20, have. The lance portion 20 according to one embodiment includes a lance body 22 and a coupling protrusion 26.

The lance body 22 has a hollow portion 24 inside and extends in the longitudinal direction. Inside the lance body 22, there is provided a hollow portion 24 through which electric wires or the like are moved. Since the lance body 22 is connected to a driving unit (not shown), it can be moved up and down. The measurement part 30 can also move to the inside and outside of the molten steel 12 by the movement of the lance body 22. [

The connecting protrusion 26 protrudes from the lance body 22 and is inserted into the measuring part 30 and has a smaller diameter than the lance body 22. [ A connecting protrusion 26 is provided below the cylindrical lance body 22 and the connecting protrusion 26 has an outer diameter smaller than the outer diameter of the lance body 22. The connecting protrusions 26 are formed in a convex shape with a gradually decreasing cross-section toward the lower side. Since the outer side of the connection protrusion 26 is formed to be inclined, the operation of connecting the measuring unit 30 to the lower side of the lance unit 20 can be facilitated.

The measuring unit 30 is coupled to the lance unit 20 so as to surround the lower portion of the lance unit 20. Various types of measuring apparatuses may be used within the scope of the invention for measuring the temperature and the composition of the molten steel 12. The measurement unit 30 according to an embodiment includes a connector unit 31, a measurement body 33, a first measurement unit 35, and a second measurement unit 36.

The connector 31 has a mounting groove 32 protruded from the measuring body 33 and into which the connecting protrusion 26 is inserted and is installed so as to surround the outside of the lance body 22. [ The connector 31 has a mounting groove 32 protruding upward from the measuring body 33 and into which the connecting protrusion 26 is inserted, and the upper side thereof is opened. The upper side of the connector portion 31 contacts the outside of the measurement body 33 in a state where the connection projection portion 26 is inserted into the connector portion 31. [

The measuring body 33 extends from the connector portion 31 and has a connecting hole 34 on a side surface thereof. The measuring body 33 extends downward from the connector portion 31 and is formed into a bar shape. A first measuring part 35 for measuring the components of the molten steel 12 is provided inside the measuring body 33 and a molten steel 12 moved to the first measuring part 35 is provided on the side surface of the measuring body 33 As shown in FIG.

The first measuring part 35 is located inside the measuring body 33 and measures the component of the molten steel 12 moved to the inside of the measuring body 33 through the connecting hole 34. The first measuring part 35 measures the components of carbon and oxygen contained in the molten steel 12 and delivers the measured value to the outside of the molten steel measuring device 1 for preventing the adhesion of the impurities.

The second measuring portion 36 is installed outside the measuring body 33 to measure the temperature of the molten steel 12. The second measurement unit 36 according to an embodiment is located below the measurement body 33 and measures the temperature of the molten steel 12 in real time. The second measuring unit 36 uses a temperature measuring device that measures the temperature even at a high temperature.

3 to 5, the blocking portion 40 is fixed to the outer side of the lance portion 20 to shield the boundary between the lance portion 20 and the measurement portion 30, It is possible to deform into various shapes within the technical idea of preventing impurities from adhering to the outside of the measuring part 30 by injecting gas to the outside of the boundary where the lance part 20 touches. The blocking portion 40 according to one embodiment includes the blocking body 42, the flow path portion 44, the jetting guide portion 46, and the microvoid portion 48.

The blocking body 42 is installed to surround the outer side of the lance portion 20 and the lower end of the blocking body 42 protrudes outward of the lance body 22 and contacts the upper end of the connector portion 31. The molten steel 12 on the outer side of the measuring portion 30 is moved between the connector portion 31 and the lance portion 20 and is prevented from being moved to the mounting groove portion 32. The blocking portion 40 according to one embodiment is installed in a shape protruding laterally of the lance body 22 so as to surround the outer peripheral surface of the lance body 22.

The flow path portion 44 forms a passage through which the gas moves along the inside of the blocking body 42. The channel portion 44 is located inside the cut-off body 42, and the ring-shaped channel extends in the vertical direction to uniformly distribute the gas over the entire area.

The jetting guide portion 46 guides the discharge of the gas so that the gas moved downward along the flow path portion 44 flows to the outside of the connector portion 31. A plurality of injection guide portions 46 are connected to the flow path portion 44. The upper side of the injection guide portion 46 is connected to the flow path portion 44 and the lower side of the injection guide portion 46 is connected to the lower side of the blocking body 42 . The injection guide 46 according to one embodiment includes a plurality of channels and is located inside the blocking body 42. Since the injection guide portion 46 is inclined from the upper side connected to the flow path portion 44 downwardly, the gas which is moved downward along the injection guide portion 46 is also discharged in a downward inclined direction.

Since the gas discharged downward along the injection guide portion 46 is moved obliquely downward, the area of contact between the gas and the upper side of the measuring portion 30 increases. Therefore, the molten steel 12 is prevented from contacting between the measuring portion 30 and the lance portion 20 to form impurities, thereby reducing the cost of removing impurities. The upper and lower inclination angles of the injection guide portion 46 according to an embodiment are about 20 degrees, and the gas discharged along the injection guide portion 46 uses argon gas.

The micro void portion 48 is located inside the jet guide portion 46 and is manufactured using a porous heat resistant material, thereby forming a plurality of micro voids. The microporous portion 48 according to one embodiment comprises 95% aluminum oxide and 4.5% silicon dioxide, referred to as silica. Since the micro void portion 48 forms a plurality of fine holes inside the jet guide portion 46, the gas traveling through the jet guide portion 46 passes through the micro void portion 48, A gas film is formed on the lower side of the blocking portion 40. The molten steel 12 moving toward the portion where the measuring portion 30 and the lance portion 20 are connected moves downward while contacting the gas discharged through the jetting guide portion 46 and the microvoid portion 48 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, the operating state of the apparatus 1 for preventing adhesion of impurities according to an embodiment of the present invention will be described in detail.

The upper end of the connector portion 31 is in contact with the lower end of the blocking body 42 in a state in which the connection protrusion of the lance portion 20 is inserted into the mounting groove portion 32 of the connector portion 31. [ The first measurement part 35 and the second measurement part 36 are operated in a state where the lance part 20 moves downward and the connection hole 34 of the measurement part 30 is locked to the molten steel 12 The temperature and the composition of the molten steel 12 are measured in real time.

When the molten steel 12 contained in the converter 10 is moved to the boundary between the measuring unit 30 and the lance unit 20 while being stirred by oxygen blowing or the like, The movement of the molten steel 12 is firstly prevented. The gas is moved downward through the flow path portion 44 to form a plurality of gas flows through the micro void portion 48 inside the injection guide portion 46 so that the outside of the shutoff portion 40 is uniformly spiraled So that the molten steel 12 is firstly shut off.

When the molten steel 12 that has passed through the gas to be sprayed reaches the boundary between the measuring section 30 and the lance section 20, the lower side of the blocking section 40 contacts the upper side of the measuring section 30 The flow of the molten steel 12 to be moved to the inside of the groove portion 32 is cut off secondarily.

It is possible to prevent the molten steel 12 from penetrating into the mounting groove portion 32 along the boundary between the lance portion 20 and the measuring portion 30 and thereby preventing the molten steel 12 from hardening.

As described above, according to the present invention, the blocking portion 40 is provided at the boundary between the lance portion 20 and the measuring portion 30 so that the molten steel 12 moves between the measuring portion 30 and the lance portion 20 The maintenance cost can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. will be. In addition, although a molten steel measuring device for preventing the adhesion of impurities to measure molten steel in a steel making plant has been described as an example, the molten steel measuring device for preventing impurity adhesion according to the present invention is also applicable to the measurement of temperature and components of molten steel produced in other factories Can be used. Accordingly, the true scope of the present invention should be determined by the following claims.

1: Measuring device for preventing adhesion of impurities
10: converter 12: molten steel
20: Lance part 22: Lance body
24: hollow part 26: connection projection
30: measuring part 31: connector part
32: mounting groove 33: measuring body
34: connecting hole 35: first measuring part
36: second measuring unit 40:
42: blocking body 44:
46: jetting guide portion 48: microvoid portion

Claims (8)

A lance part installed to the molten steel contained in the converter;
A measuring unit coupled to the lower portion of the lance and configured to measure a temperature and a component of the molten steel; And
And a blocking part fixed to the outside of the lance part and spraying gas to the outside of the boundary where the measuring part is in contact with the lance part to prevent impurities from adhering to the outside of the measuring part. Measuring device.
The method according to claim 1,
The lance portion includes a lance body having a hollow portion inside and extending in the longitudinal direction; And
And a connection protrusion protruding from the lance body and inserted into the measurement unit and having a smaller diameter than the lance body.
3. The method of claim 2,
The measuring unit may include a connector portion having a mounting groove portion into which the connection protrusion is inserted and which is installed to surround the outside of the lance body;
A measurement body extending from the connector portion and having a connection hole on a side surface thereof; And
And a first measuring unit located inside the measuring body and measuring a component of molten steel moved to the inside of the measuring body through the connecting hole.
The method of claim 3,
Wherein the measuring unit further comprises a second measuring unit installed outside the measuring body for measuring the temperature of the molten steel.
The method of claim 3,
Wherein the blocking portion includes: a blocking body installed to surround the outer side of the lance portion;
A flow path portion forming a path through which the gas moves along the inner side of the cut-off body; And
And a jet guide portion for guiding the discharge of the gas so that the gas moved downward along the flow portion flows to the outside of the connector portion.
6. The method of claim 5,
Wherein the injection guide portion is connected to a plurality of the flow path portions, the upper side is connected to the flow path portion, and the lower side is connected to a lower side of the blocking body.
The method according to claim 6,
Wherein the injection guide portion is provided so as to incline downward from an upper side connected to the flow path portion.
6. The method of claim 5,
Wherein the lower end of the cut-off body protrudes to the outside of the lance body and contacts the upper end of the connector portion.
KR1020150087139A 2015-06-19 2015-06-19 Molten metal measuring apparatus for preventing adhesive impurities KR20160149668A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101966877B1 (en) * 2017-11-01 2019-04-08 한국항공우주연구원 Temperature-measuring sensor module for projectile base and missile and projecile having the same
CN110484680A (en) * 2019-08-05 2019-11-22 邯郸钢铁集团有限责任公司 The method for calculating oxygen rifle height using incremental encoder
CN116793507A (en) * 2023-08-28 2023-09-22 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) Groundwater level temperature detection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101966877B1 (en) * 2017-11-01 2019-04-08 한국항공우주연구원 Temperature-measuring sensor module for projectile base and missile and projecile having the same
CN110484680A (en) * 2019-08-05 2019-11-22 邯郸钢铁集团有限责任公司 The method for calculating oxygen rifle height using incremental encoder
CN116793507A (en) * 2023-08-28 2023-09-22 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) Groundwater level temperature detection device
CN116793507B (en) * 2023-08-28 2023-10-31 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) Groundwater level temperature detection device

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