KR910005997Y1 - Porous-plug for top bubbling lance - Google Patents

Porous-plug for top bubbling lance Download PDF

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Publication number
KR910005997Y1
KR910005997Y1 KR2019880019166U KR880019166U KR910005997Y1 KR 910005997 Y1 KR910005997 Y1 KR 910005997Y1 KR 2019880019166 U KR2019880019166 U KR 2019880019166U KR 880019166 U KR880019166 U KR 880019166U KR 910005997 Y1 KR910005997 Y1 KR 910005997Y1
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South Korea
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lance
porous
plug
pipe
bubbling
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KR2019880019166U
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Korean (ko)
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KR900009781U (en
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박정목
이기배
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조선내화학공업 주식회사
이화일
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Priority to KR2019880019166U priority Critical patent/KR910005997Y1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/003Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using inert gases

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

내용 없음.No content.

Description

포러스프러그(Porous plug) 벽돌을 내장한 톱버브링랜스(Top bubbling lance)Top bubbling lance with porous plug brick

제 1 도 래들(Ladle) 내 용강 버브링(Bubbling) 조업을 나타낸 상태도로서, (a) 톱 (Top) 버브링 장치, (b) 보텀(Bottom) 버브링 장치.1 is a state diagram showing molten steel bubbling operation in a ladle, wherein (a) a top burbing device and (b) a bottom burbing device.

제 2 도 종래의 버브링 랜스의 단면도로서, (a) 스트레이트 타입 랜스(Straight type lance), (b) 는 T자형 리버스 타입 랜스(Reverse type lance).2 is a cross-sectional view of a conventional bubbling lance, wherein (a) a straight type lance and (b) are a T-shaped reverse type lance.

제 3 도 본 고안의 버브링 랜스 단면도.3 is a cross-sectional view of the bubbling lance of the present invention.

제 4a 도는 제 3 도의 부분 확대 사시도, (b) 제 3 도의 부분 확대 단면도.4a is a partially enlarged perspective view of FIG. 3, (b) a partially enlarged cross-sectional view of FIG.

제 5 도 제 3 도의 A - A 단면도.A-A cross sectional view of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 래들 2 : 용강1: ladle 2: molten steel

3 : 슬래그 4 : 랜스3: slag 4: lance

5 : 가스취입구 6 : 포러스프러그5: Gas inlet 6: Porus plug

10 : 가스토출구 12 : 포러스프러그취부덮개 및 파이프10: gasoline outlet 12: porous plug mounting cover and pipe

본 고안은 용강 정련시 사용되는 버브링 랜스(Bubbling lance)의 가스토출구에 포러스프러그(Porus plug) 벽돌을 취부한 랜스에 관한 것이다.The present invention relates to a lance in which a Porus plug brick is mounted on a gas stove outlet of a bubbling lance used in refining molten steel.

연속주조 및 통상적인 주조에 의한 청정강을 생산하기 위해서는 래들내의 용강온도의 균일화, 비금속 개재물의 부상촉진, 각종 첨가재의 균일분산 및 반응촉진, 탈가스처리등을 래들내에서 용강버브링으로 실시하고 있다.In order to produce clean steel by continuous casting and ordinary casting, the molten steel temperature in the ladle, the promotion of floating of nonmetallic inclusions, the uniform dispersion and reaction of various additives, the degassing treatment, etc. have.

현재깔지의 버브링 방식은 제 2 도에 나타난 바와같은 톱버브링(Top bubbling) 방식으로서 래들(1) 내의 용강(2)중에 랜스(4)를 침적시켜 아르곤(Ar) 및 질소(N2) 가스를 가스취입구(5)를 통해 불어넣는 스트레이트 타입 제 2a 도와 T자형 리버스 타입 제2b도가 있다.Server bring way current kkalji is immersed lance 4, the molten steel 2 in the topbeo bring (Top bubbling) scheme as a ladle (1) as shown in FIG. 2 argon (Ar) and nitrogen (N 2) gas There is a straight type 2a and a T-shaped reverse type 2b for blowing air through the gas inlet 5.

이들은 일반적으로 철골조로 된 랜스파이프(7)에 앵커(8)와 캐스터블(9)로 구성되어 있다.They are generally composed of an anchor 8 and a castable 9 in a steel pipe 7 of steel frame.

그러나 이런 종래의 랜스는 가스토출구가 노즐(Nozzle) 타입으로만 되어 있어 사용중 취입가스의 압력이 낮을 경우에는 노즐로 용강이 침입하여 노즐막힘으로 인해 랜스의 폐각요인이 되고 있으며, 가스의 미세 유량 조절이 어렵다.However, such a conventional lance has a gaseous outlet only as a nozzle type, and when the pressure of the blown gas is low during use, molten steel invades the nozzle, causing clogging of the lance due to nozzle clogging. This is difficult.

또한 취입가스 압력을 크게하여 버브링할 경우는 래들내의 용강이 스로핑작용에 의해 슬래그(Slag)(3) 층이 벗겨져 용강 산화등이 일어난다.In addition, when the blowing gas pressure is increased to bubbling, the slag 3 layer is peeled off by the slapping action of the molten steel in the ladle, and molten steel oxidation occurs.

이런 문제점을 개선하기 위해 제 1b 도와 같이 래들 바닥부위에 포러스프러그(6)를 취부한 보텀 버브링(Bottom bubbling) 방식이 사용되고 있으나 이는 래들바닥에 설치하여야 하기 때문에 별도 장치가 필요하며 이의 수리, 교체등에 많은 노력과 복잡성이 있고 용강유출 위험부담도 있다.In order to solve this problem, a bottom bubbling method in which a forrus plug 6 is mounted on the bottom of the ladle is used, as shown in FIG. 1b. However, since a bottom bubbling method needs to be installed on the bottom of the ladle, a separate device is required. There is a lot of effort and complexity in the back, and there is a risk of molten steel spill.

또한 사용중 지금(地金) 및 슬래그의 부착이 크며 이로인해 버브링이 불가한 경우가 발생하는 등의 문제점이 있다.In addition, there is a problem such that the adhesion of the slag and slag during use is large, and this causes the bubbling to be impossible.

본 고안은 이런 종래의 문제점을 해결코저 톱버브링 장치의 가스토출구 부위에 다공질인 포러스프러그 벽돌을 취부하므로서 랜스를 통한 가스취입시 작은 입자기포발생 촉진과 가스유량의 조절용이 및 용강침입에 따른 막힘현상등을 개선하는데 목적이 있다.The present invention solves such a conventional problem by installing a porous porous plug brick at the gas outlet outlet of the top burring device, promoting small particle bubbles during gas injection through the lance, controlling gas flow rate, and preventing clogging due to infiltration of molten steel. The purpose is to improve the back.

이하 본 고안의 기술을 상세히 설명키로 한다.Hereinafter, the technique of the present invention will be described in detail.

본 고안은 철골조로 된 랜스파이프(7)에 앵커(8)와 캐스터블(9)을 구성시킨 가스토출구가 있는 버브링 랜스에 있어서 기공경(氣孔俓) 이 0.4 mm 이하인 포러스프러그(Porous plug) 벽돌(11)에 실링모르터(Sealing Mortar)(14)를 도포하여 메탈케이스(13)에 삽입시키고 이에 철물로 된 파이프가 달린 덮게(12)를 용접하고 메탈케이스에 앵커(8)를 설치하여 랜스파이프(7)에 연결시켜서 된 포러스프러그 벽돌을 취부한 톱버브링 랜스로 된 구성이다.The present invention is a porous plug having a pore diameter of 0.4 mm or less in a burring lance having a gas outlet outlet formed of an anchor 8 and a castable 9 in a steel frame lance pipe 7. Sealing mortar (14) is applied to the brick (11), inserted into the metal case (13), welded to the cover (12) with a pipe made of steel, and the anchor (8) is installed in the metal case to the lance It is the structure which consists of the top burring lance which mounted the porous spruce brick connected to the pipe 7.

상기 구성에서 포러스프러그 벽돌에 메탈케이스(13)를 감지 않은 부위도 가스의 유출방지를 위해 실링모르터(14)를 바르고 철골조로 된 메탈케이스 및 앵커 부위에는 수성페인트를 수회 도포해 건조시킨 다음 캐스터블(9)을 시공하면 사용중 팽창에 의한 크랙을 방지시킬 수 있다.In the above configuration, the sealing mortar 14 is applied to the parts of the metal case 13 that are not detected on the porous spruce brick, and the water is applied to the metal case and the anchor part of the steel frame by applying water-based paint several times, and then castable. Construction of (9) can prevent cracking due to expansion during use.

다공질인 포러스프러그 벽돌의 기공경은 취입가스유량(Nm3/Hr) 에 따라 다소차이는 있겠으나 최대기공경이 0.4 mm 를 초과시는 취입가스에 따른 작은입자 기포 발생이 활발치 않아 불순물의 부상촉진이 원만치 않고 취입가스 압력이 낮을 시 용강침입으로 막힘현상의 우려가 있다.The pore diameter of porous porous spruce brick may vary according to the blowing gas flow rate (Nm 3 / Hr), but small particle bubbles are not generated due to the blowing gas when the maximum pore diameter exceeds 0.4 mm. If the blown gas pressure is low, there is a risk of clogging due to infiltration of molten steel.

이상에서와 같은 본 고안의 기술은 랜스의 가스토출구가 포러스프러그 벽돌로 기공경이 작기 때문에 용강침입으로 인한 막힘 현상이 없고 포러스플러그를 통과한 가스의 기포입자가 작아 부상시 불순 개재물의 포집효과가 좋으며 가스의 유량조절과 스로핑 발생을 억제하므로서 청정강 생산에 유리한 고안임을 알수 있다.As described above, the technology of the present invention has a small pore diameter due to the blast gas outlet of the lance and the pore diameter of the lance, and the bubble particles of the gas passing through the forrus plug are small, so that the trapping effect of impurity inclusions is good when injured. It can be seen that it is an advantageous design for the production of clean steel by controlling the flow rate of the gas and suppressing the occurrence of the dropping.

이에 따른 시험결과는 하기의 (표 1) 과 같다.The test results are as shown in Table 1 below.

[표 1] 랜스 사용실적 비교[Table 1] Comparison of Lance usage

Claims (1)

철골조로 된 랜스파이프(7)에 앵커(8)와 캐스터블(9)을 구성시킨 가스토출구가 있는 버브링 랜스에 있어서, 기공경이 0.4mm 이하인 포러스프러그 벽돌(11)에 실링모르터(14)를 도포하여 메탈케이스(13)에 삽입시키고 이에 철물로 된 파이프가 달린 앵커(8)를 설치하여 랜스파이프(7)에 연결시켜서 된 포러스프러그 벽돌을 취부한 것을 특징으로 하는 용강용 톱버브링 랜스.In the bubbling lance with a gas outlet which consists of the anchor 8 and the castable 9 in the steel pipe lance pipe 7, the sealing motor 14 is attached to the porous spruce brick 11 having a pore diameter of 0.4 mm or less. Molten steel top-burb lance, which is applied to the metal case (13) and installed in the metal pipe (13) with a steel pipe anchor (8) to connect to the lance pipe (7).
KR2019880019166U 1988-11-26 1988-11-26 Porous-plug for top bubbling lance KR910005997Y1 (en)

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KR2019880019166U KR910005997Y1 (en) 1988-11-26 1988-11-26 Porous-plug for top bubbling lance

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KR910005997Y1 true KR910005997Y1 (en) 1991-08-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100845266B1 (en) * 2002-07-05 2008-07-09 주식회사 포스코 Castable Block

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100845266B1 (en) * 2002-07-05 2008-07-09 주식회사 포스코 Castable Block

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