KR20030022969A - Pressure joint pipe for lower part of the vessel reflux pipe - Google Patents

Pressure joint pipe for lower part of the vessel reflux pipe Download PDF

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Publication number
KR20030022969A
KR20030022969A KR1020010055829A KR20010055829A KR20030022969A KR 20030022969 A KR20030022969 A KR 20030022969A KR 1020010055829 A KR1020010055829 A KR 1020010055829A KR 20010055829 A KR20010055829 A KR 20010055829A KR 20030022969 A KR20030022969 A KR 20030022969A
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South Korea
Prior art keywords
pipe
reflux
press
vessel
injection
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KR1020010055829A
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Korean (ko)
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KR100812142B1 (en
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정효철
박종주
이우성
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주식회사 포스코
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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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: An injection pipe for reflux pipe of lower tank of vessel is provided to extend life cycle of the reflux pipe by installing the injection pipe for repairing the reflux pipe using MgO-Cr2O3 bricks to prevent erosion of the reflux pipe due to reflux of molten steel. CONSTITUTION: In an injection pipe that is installed at a reflux pipe to prevent wear and erosion of the reflux pipe of the lower tank of the vessel, the injection pipe for the reflux pipe of the lower tank of the vessel is characterized in that the injection pipe(30) is formed in a cylinder shape upper and lower parts of which are opened, and which is formed of MgO-Cr2O3 bricks, injection refractories spouting holes(31) are formed at the four sides of the injection pipe, the injection refractories spouting holes(31) that are formed at the four sides of the injection pipe are formed in at least two stages or more, branch pipes(41) for injecting injection refractories are installed at the injection refractories spouting holes(31) formed on the injection pipe(30), an injection refractories supply pipe(40) is installed on the branch pipes(41), and at least two lines or more of ring shaped rims(32) are projectingly formed on the outer circumference of the injection pipe(30).

Description

베셀 하부조 환류관용 압입관{Pressure joint pipe for lower part of the vessel reflux pipe}Press joint pipe for lower part of the vessel reflux pipe

본 발명은 베셀(Vessel) 하부조 환류관용 압입관에 관한 것으로서, 더욱 상세하게는 상기 베셀 하부조의 환류관이 용강 탈 가스작업을 위한 용강 환류 작업에 의해 용손 및 침식되었을 때 그 용손 및 침식된 부분을 보수하고 그 보수된 환류관을 보강하도록 하는 압입관에 관한 것이다.The present invention relates to a press-fit pipe for a vessel lower vessel reflux tube, and more particularly, when the reflux tube of the vessel lower vessel is melted and eroded by the molten steel reflux operation for molten steel degassing. It relates to a press-fit pipe to repair the repair and reinforce the repaired reflux pipe.

일반적으로 용강의 탈 가스작업은 베셀 하부조(11)에 마련된 환류관(12)은 진공펌프를 이용하여 래들내의 용강을 환류시켜 용강 중의 불순물제거 및 용강의 성분을 균일화시켜 용강의 품질을 개선시키는 것이다.In general, the degassing operation of the molten steel is performed by reflux tube 12 provided in the vessel lower tank 11 to reflux molten steel in the ladle using a vacuum pump to remove impurities in the molten steel and to uniform the components of the molten steel to improve the quality of the molten steel. will be.

이와 같이 용강의 품질개선을 위한 베셀(10)의 구조는 도 1에 나타낸 바와 같이 하부에 베셀하부조(11)가 마련되고 그 베셀하부조(11)의 하단 양측에는 환류관(12)이 마련되는데, 그 환류관(12) 중 어느 일 측은 래들(20)의 용강(21)을 흡입하는 상승관(12a), 타 측은 상승관(12a)으로 흡입된 용강(21)을 다시 래들(20)로 내려보내는 하강관(12b)이다.As shown in FIG. 1, the vessel 10 for improving the quality of molten steel is provided with a lower vessel 11 having a lower portion of the vessel, and a reflux tube 12 is provided at both lower sides of the vessel lower portion 11. One side of the reflux tube 12 is the rising pipe (12a) for sucking the molten steel 21 of the ladle 20, the other side is the ladle 20 again sucked into the molten steel (12a) Down pipe (12b) is sent down.

그리고 상기 상승관(12a)과 하강관(12b)으로 구분되는 환류관(12)의 하부에는 래들(20)의 용강(21)에 담겨지는 침적관(13)이 설치되고 그 침적관(13)은 한번 사용한 후 폐기처분하고 다시 베설하부조(11)를 사용하고자 할 때에는 새로운 침적관(13)을 설치하여 사용한다.And the lower part of the reflux tube 12, which is divided into the rising tube (12a) and the lowering tube (12b), the deposition tube 13 contained in the molten steel 21 of the ladle 20 is installed and the deposition tube 13 Dispose of after using once, and when you want to use the lower sub-assembly (11) to install and use a new immersion pipe (13).

상기 래들(20)의 용강(21)을 상승관(12a)으로 흡입하고 그 흡입된 용강을 베셀하부조(11)의 바닥면을 통하여 하강관(12b)으로 배출하는 작업을 용강 환류작업이라 하는데, 이때 상기 환류되는 용강은 자체비중이 무겁고 또 고열(1600℃)상태이기 때문에 환류관(12)의 압입재(22)가 용손 또는 침식이 이루어진다.The operation of sucking the molten steel 21 of the ladle 20 into the rising pipe 12a and discharging the sucked molten steel to the downcoming pipe 12b through the bottom surface of the vessel lower relief 11 is called molten steel reflux operation. In this case, the refluxed molten steel has a heavy specific gravity and high heat (1600 ° C.), so that the press-fitting material 22 of the reflux tube 12 is melted or eroded.

따라서 상기 용손 또는 침식 환류관(12)은 지속적이며 주기적으로 보수를 해야하고 그 보수는 압입재(22)라고 하는 케스타블을 물과 함께 섞어서 도 2에 나타낸 바와 같은 철재로 된 압입관(23)을 사용하여 압입작업을 하고 있다. 이와 같이하여 압입작업이 끝나면 그를 일정시간동안 방치하면서 양생시킨 후 사용한다.Therefore, the yongson or erosion reflux tube 12 is to be repaired continuously and periodically and the repair is a press-fitting tube made of steel as shown in Figure 2 by mixing the castable called the indenter 22 with water (23) Pressing is performed using). In this way, after the press-in work, he is left to cure for a certain time and then used.

단 상기 압입재(22)와 철재로 된 압입관(23)을 이용하여 보수된 환류관(12)을 사용하고자 할 때에는 새로운 침적관(13)을 환류관(12)의 하단에 연결 설치하여 사용하는 것이고, 상기 철재로 된 압입관(23)은 환류관(12)의 침식된 부분을 보수하는 압입재(22)를 충입할 때에 거푸집 역할을 한다.However, when using the reflux tube 12 repaired by using the press-fit material 22 and the press-fit pipe 23 made of steel, a new deposition pipe 13 is connected to the bottom of the reflux pipe 12 to be used. The iron press-fit pipe 23 serves as a formwork when filling the press-fit material 22 for repairing the eroded portion of the reflux pipe 12.

상기와 같이 환류관(12)이 보수되고 침적관(13)이 설치된 베셀하부조(11)를 이용하여 래들(20)의 용강을 탈 가스작업 하게되면 환류관(12)의 상승관(12a)을 통하여 래들(20)의 용강이 흡입되어 하강관(12b)을 통하여 다시 래들(20)로 배출되는 과정으로 용강의 환류가 일어나는데, 이때 상기 철재로 된 압입관(23)은 용강의 환류와 동시에 녹아 없어지고 침식된 부분을 보수한 압입재(22)만 남게 된다.When the reflux tube 12 is repaired as described above and the gas is removed from the molten steel of the ladle 20 using the vessel lower relief 11 in which the deposition tube 13 is installed, the rising tube 12a of the reflux tube 12 is provided. Through the molten steel of the ladle 20 is sucked through and discharged back to the ladle 20 through the downcomer 12b, the reflux of the molten steel occurs, wherein the press-fitting pipe 23 made of steel at the same time as the reflux of the molten steel Only the indentation material 22 that melts away and repairs the eroded portion remains.

따라서 상기 압입재는 그 특성상 고온의 용강에 약하여 침식이 빨리 이루어지고, 특히 환류관(12)과 침적관(13)의 연결 설치부분에 용손이 심하게 일어난다. 그 이유는 상기 환류관(12)은 그 재질이 압입재인 케스타블이고 침적관(13)은 연와이기 때문이다.Therefore, the press-fitting material is vulnerable to high temperature molten steel due to its characteristics, so that erosion occurs quickly, especially in connection between the reflux pipe 12 and the immersion pipe 13. The reason is that the reflux tube 12 is a castable material of the press-fitting material and the deposition tube 13 is a lead.

이상과 같이 환류관(12)을 보수하는 압입재(22)인 케스탈블이나 철재로 된 압입관(23)은 환류관(12)을 일시적으로 보수하여 사용하는 부재일 뿐 환류관을 보호하고 수명을 연장시키는 데에는 별 효과가 없었다.As described above, the press-fitting pipe 23 made of castable or steel, which is the press-fitting material 22 for repairing the reflux pipe 12, is a member that temporarily repairs and uses the reflux pipe 12 to protect the reflux pipe. There was little effect in extending the lifespan.

본 발명은 상기와 같은 제반 문제점을 감안하여 이를 하소하고자 발명한 것으로서, 그 목적은 환류관을 보수하는 압입관을 MgO-Cr2O3연와로 함으로서 용강의 환류에 의한 환류관의 침식을 방지하여 그 환류관의 사용수명을 연장할 수 있는 있도록 한 베셀 하부조 환류관용 압입관을 제공함에 있다.The present invention was invented in order to calculate it in view of the above-mentioned problems, and its object is to prevent the erosion of the reflux tube by the reflux of molten steel by making the press-fit tube repairing the reflux tube with MgO-Cr 2 O 3 . The present invention provides a press-fitting tube for a vessel underflow reflux tube to extend the service life of the reflux tube.

또한 본 발명의 다른 목적은 MgO-Cr2O3연와로 된 통형의 환류관 외주연에 상하부 선택된 곳에 외부로 돌출되는 형태의 환테를 형성시켜 그 환테에 의해 상기 압입관이 환류관에 안정하고 견고한 고정되도록 한 베셀 하부조 환류관용 압입관을 제공함에 있다.In addition, another object of the present invention is to form a ring frame protruding to the outside of the upper and lower portions selected on the outer periphery of the tubular reflux tube of MgO-Cr 2 O 3 edge by the annulus the indentation tube is stable and robust to the reflux tube In another aspect, there is provided a press-fit tube for the vessel sub-reflux reflux tube to be fixed.

도 1은 일반적인 베셀하부조 환류관의 침적관이 래들의 용강에 침적된 상태를 나타낸 일부 단면도,1 is a partial cross-sectional view showing a state in which the deposition pipe of the conventional vessel vessel reflux reflux pipe is deposited on the molten steel of the ladle,

도 2는 종래에 사용되고 있는 압입관의 단면 구성도,2 is a cross-sectional configuration diagram of a press-fit tube conventionally used;

도 3은 종래의 압입관이 침적관에 설치된 상태의 단면도,3 is a cross-sectional view of a state in which a conventional indentation pipe is installed in the deposition pipe,

도 4는 본 발명에 따른 압입관의 사시도,4 is a perspective view of a press-fit tube according to the present invention;

도 5는 본 발명에 따른 압입관의 단면도,5 is a sectional view of a press-fit tube according to the present invention;

도 6은 본 발명에 따른 압입관이 침적관에 설치된 상태의 단면도,6 is a cross-sectional view of the press-fit pipe installed in the deposition pipe according to the present invention;

※도면의 주요부분에 대한 부호 설명※※ Explanation of symbols on main parts of drawing ※

30 : 압입관 31 : 압입재분출공30: press-fit pipe 31: press-fit ash ejection hole

32 : 환테 40 : 압입재공급파이프32: ring 40: indentation supply pipe

41 : 분기관41: branch pipe

상기와 같은 목적을 달성하기 위한 본 발명의 특징적인 기술적 구성은 베셀하부조 환류관에 설치되는 압입관을 MgO-Cr2O3연와로 형성시켜 된 것으로서, 그 구체적인 구성은 베셀 하부조의 환류관 침식을 보수하고 그 보수된 환류관을 보강하는 압입관에 있어서, 상기 압입관은 MgO-Cr2O3연와로 이루어지고 압압재분출공이 형성된 원통형몸체로 형성되고 그 원통형몸체의 내부에는 압입재를 압압재분출공으로 분사하는 압입재파이프가 설치되어 있다.Characteristic technical features of the present invention for achieving the above object is to form a press-fitted pipe installed in the vessel vessel reflux reflux MgO-Cr 2 O 3 , the specific configuration is the reflux tube erosion of the vessel vessel In the indentation pipe for repairing and reinforcing the repaired reflux pipe, the indentation pipe is formed of a cylindrical body made of MgO-Cr 2 O 3 edge and formed with a pressurizing material ejection hole and press-fitting material inside the cylindrical body A press-fitting material pipe for injection into the press-fitting hole is provided.

이와 같은 특징을 갖는 본 발명의 베셀하부조 환류관용 압입관을 첨부도면을 참조하여 상세하게 설명하면 다음과 같다.When described in detail with reference to the accompanying drawings, the press-fit pipe for the vessel vessel sub-reflux reflux tube of the present invention having such characteristics as follows.

본 발명의 도 4 및 도 5는 압입관의 사시도 및 단면도로서, 이에 나타낸 바와 같이 압입관(30)은 상하부가 개방되고 재질은 MgO-Cr2O3연와로 이루어져 있으며 외주연에는 사방으로 압입재분출공(31)이 형성되어 있는데, 그 압입재분출공(31)은 압입관(30)의 상부에서부터 하부로 3단이 형성되어 있다.4 and 5 of the present invention is a perspective view and a cross-sectional view of the indentation pipe, as shown in the indentation pipe 30, the upper and lower parts and the material is composed of MgO-Cr 2 O 3 edge and the outer periphery indentation material in all directions The blowing hole 31 is formed, and the press fitting material blowing hole 31 is formed in three stages from the upper part of the press fitting pipe 30 to the lower part.

이와 같이 압입재분출공(31)을 여러개 형성시킨 이유는, 환류관()의 침식부분을 압입재(케스타블과 물이 혼합된 반죽상태)(22)로 보수할 때에 그 압입재(22)가 상기 환류관(12)의 침식부분에 골고루 분사되어 보수작업이 균일하게 일어나도록 하기 위함이다.The reason why the plurality of press-fit material ejection holes 31 are formed in this way is that when the eroded portion of the reflux pipe () is repaired to the press-fit material (dough state mixed with castable and water) 22, the press-fit material 22 ) Is evenly sprayed on the erosion part of the reflux tube 12 to ensure that the repair work takes place uniformly.

그리고 상기 압입재분출공(31)을 압입관(30)의 상부에서부터 하부로 3단 형성시켜 사용하였는데, 그 이상을 형성시키거나 그 이하를 형성시켜 사용해도 된다. 단 한가지 유의사항은 환류관(12)에 압입재(22)를 충입할 때에 그 압입재가 환류관의 침식부분에 골고루 분사될 수 있으면 된다.And the press-fit material injection hole 31 was used to form three stages from the top to the bottom of the press-fit pipe 30, it may be used to form more or less. The only thing to note is that when filling the press-fitting material 22 into the reflux tube 12, the press-fitting material can be evenly sprayed on the eroded portion of the reflux tube.

또 상기 압입관(30)에 형성된 압입재분출공(31)에는 압입재(22)가 공급되는 압입재공급파이프(40)가 설치되어 있는데, 그 압입재공급파이프(40)에는 상기 각각의 압입재분출공(31)과 연결 설치되는 분기관(41)이 설치되어 있다. 그리고 상기 압입재공급파이프(40) 끝단에는 압입재공급수단(도면미도시)으로부터 공급되는 압입재를 압입재공급파이프(40)로 고급해주는 호스(43)가 연셜되는 연결구(42)가 설치되어 있다.In addition, the press-fit material injection hole 31 formed in the press-fit pipe 30 is provided with a press-fit material supply pipe 40 to which the press-fit material 22 is supplied, and each press-fit material supply pipe 40 is provided. The branch pipe 41 connected with the re-discharge hole 31 is provided. And the end of the press-fit material supply pipe 40 is provided with a connector 42 which is connected to the hose 43 is advanced to the press-fit material supplied from the press-fit material supply means (not shown) to the press-fit material supply pipe 40 is installed have.

또한 상기 압입관(30)의 외주연에는 적어도 2줄 이상의 환테(32)가 돌출되게 형성되어 있는데, 그 환테(32)를 돌출되게 형성시킨 이유는, 환류관(12)의 침식부분에 압입재를 충입할 때에 그 충입되는 압입재(22)에 환테(32)가 매립되게 하여 상기 압입재(22)가 양생되면서 환테(32)를 견고하게 고정함으로 결과적으로는 압입관(30)이 베셀하부조(11)와 안견하고 견고한 일체화를 유지시킨다.In addition, the outer periphery of the indentation pipe 30 is formed to protrude at least two or more lines of the ring frame 32, the reason for forming the ring frame 32 to protrude, the indentation material in the eroded portion of the reflux tube 12 At the time of filling, the annulus 32 is embedded in the indentation material 22 to be filled, so that the indentation material 22 is cured, thereby firmly fixing the annulus 32. As a result, the indentation pipe 30 is lower in the vessel. Maintain a stable and solid integration with the jaw (11).

한편 상기 압입관(30)의 외주연에 돌출되게 형성된 환테(32)의 위치는 압입관(30)의 상부와 하부에 형성되는 것이 바람직하나 압입관의 상부에서부터 하부로 일정간격을 유지하며 형성돼도 되고 또 어느 일부에만 형성시켜도 무방하다. 또한 상기 환테 형태가 아닌 돌기형태로 형성시켜 사용해도 된다.On the other hand, the position of the annulus 32 formed to protrude on the outer periphery of the indentation pipe 30 is preferably formed on the upper and lower portions of the indentation pipe 30, but is formed while maintaining a predetermined interval from the top of the indentation pipe It may be formed only in any part. Moreover, you may use it, forming in the form of protrusion rather than the said ring-shaped form.

이상과 같이 형성된 본 발명의 압입관(30)을 이용하여 베셀하부조(11)의 환류관(12) 침식부분을 보수하고, 또 압입관을 환류관에 고정 설치하는 방법을 도 6을 참조하여 설명하면 다음과 같다.With reference to FIG. 6, a method of repairing the eroded portion of the reflux tube 12 of the vessel lower relief 11 using the press-fit pipe 30 of the present invention formed as described above and fixing the press-fit pipe to the reflux pipe is described with reference to FIG. The explanation is as follows.

본 발명은 먼저 환류관(12)으로 래들(20)의 용강(21)을 환류시켜 환류관(12)의 내부 압입재(22)가 침식이 발생하면 침적관(13)을 제거하고 환류관(12)의 하부를 통하여 본 발명의 MgO-Cr2O3연와로 이루어진 원통형 압입관(30)을 삽입한 다음 상기 압입관(30)의 하단부에 형성된 맹판(33)과 환류관(12)의 하단에 형성된 프랜지(14)를 상호 고정한다.The present invention is to first reflux the molten steel 21 of the ladle 20 to the reflux tube 12 to remove the immersion tube 13 when the internal indentation material 22 of the reflux tube 12 erosion occurs and the reflux tube ( 12) inserting the cylindrical press-fit tube 30 made of MgO-Cr 2 O 3 edge of the present invention through the bottom of the bottom plate 33 and the bottom of the reflux tube 12 formed at the bottom of the press-fit tube 30 Fix the flanges 14 formed in each other.

이와 같이하여 압입관(30)이 환류관(12)내에 삽입 안착된 상태에서 압입관(30)내에 설치된 압입재공급파이프(40)를 통하여 압입재(22)를 공급하고 그는 분기관(41)을 통하여 압입재분출공(31)으로 분사되면서 상기 환류관(12)의 침식부분을 메우게 된다. 단 상기 압입재(22)가 침식부분을 매울 때에는 환테(32)도 매립된다. 상기의 상태가 완료되면 베셀하부조(11)를 일정시간동안 방치해둬 압입재(22)가 양생되게 한다.In this way, in the state in which the press-fit pipe 30 is inserted and seated in the reflux pipe 12, the press-fit material 22 is supplied through the press-fit material supply pipe 40 installed in the press-fit pipe 30, which is the branch pipe 41. The erosion part of the reflux tube 12 is filled while being injected into the indentation material ejection hole 31 through. However, when the press-fitting material 22 fills the eroded portion, the ring frame 32 is also embedded. When the above state is completed, the vessel lower relief 11 is left for a predetermined time so that the press-fit material 22 is cured.

이상의 상태는 환류관(12)의 침식부분을 보수하고 압입관(30)을 환류관(12)에 고정 설치하는 작업으로서 상기 압입관(30)이 환류관(12)에 고정 설치되면 그 환류관(12)의 하단에 새로운 침적관(13)을 설치하고 용강이 담겨진 래들(20)을 상켜시켜 상기 침적관(13)이 용강에 침적되게 한 다음 그 용강을 환류시켜 용강 중의 탈 가스작업을 함으로서 래들의 용강 불순물제거 및 용강의 성분을 균일화시키게 되는 것이다.The above state repairs the eroded portion of the reflux tube 12 and fixes the indentation tube 30 to the reflux tube 12. When the indentation tube 30 is fixed to the reflux tube 12, the reflux tube is fixed. By installing a new immersion pipe 13 at the bottom of the (12), the ladle (20) containing the molten steel up and down so that the immersion pipe 13 is deposited in the molten steel and then refluxed the molten steel to perform degassing in the molten steel It is to remove the molten steel impurities of the ladle and to uniform the components of the molten steel.

이때 상기 압입관(30)에 설치된 압입재공급파이프(40)는 용강의 환류와 함께 녹아 없어지고, 압압관은 용강에 강한 MgO-Cr2O3연와로 이루어져 있어 종래 철재로 된 압입관에 비해 그 수명이 향상되고, 또 본 발명의 압입관은 종래 철재로 된 압입관처럼 녹아 없어지지 않기 때문에 환류관의 압입재가 침식되지 않아 환류관 또한 수명이 향상되는 장점이 있다.At this time, the press-fit material supply pipe 40 installed in the press-in pipe 30 is melted away with the reflux of the molten steel, the press-pipe is made of MgO-Cr 2 O 3 edges resistant to the molten steel, compared to the press-fit pipe made of conventional steel Its lifespan is improved, and the press-fit tube of the present invention does not melt like a press-fit tube made of conventional steel, so that the press-fit material of the reflux tube does not erode, so the reflux tube also has the advantage of improving the service life.

이상과 같은 본 발명의 압입관은 고온의 용강에 강한 MgO-Cr2O3연와로 이루어져 있기 때문에 환류관으로 고온의 용강이 환류된다 해도 침식이 이루어지지 않아 용강의 환류작업 중 발생할 수 있는 용강유출사고를 방지할 수 있고, 또 환류관의 수명을 향상시킴으로 인한 베셀하부조의 수명을 연장시킬 수 있어 경제성이나 생산성을 높일 수 있는 특유의 효과가 있다.Since the press-fit pipe of the present invention is composed of MgO-Cr 2 O 3 edges resistant to high temperature molten steel, even though high temperature molten steel is refluxed to the reflux tube, erosion does not occur and molten steel leakage may occur during the reflux operation of the molten steel. It is possible to prevent accidents and to extend the life of the vessel lower relief by improving the life of the reflux tube, which has a unique effect of increasing economic efficiency and productivity.

Claims (4)

베셀하부조의 환류관 용손 및 침식을 방지하도록 환류관에 설치되는 압입관에 있어서,In the press-fitting pipe which is installed in the reflux pipe to prevent erosion loss and erosion of the vessel lower relief, 상기 압입관(30)은 상하부가 개방되고 재질은 MgO-Cr2O3연와로 이루어진 원통형임을 특징으로 하는 베셀하부조 환류관용 압입관.The indentation pipe 30 is the upper and lower parts and the material is MgO-Cr 2 O 3 It is a cylindrical lower vessel reflux pipe indentation tube, characterized in that consisting of the edge. 제1항에 있어서, 상기 압입관에는 사방으로 압입재분출공(31)이 형성되고 그 사방으로 형성된 압입재분출공은 적어도 2단 이상임을 특징으로 하는 베셀하부조 환류관용 압입관.According to claim 1, wherein the indentation pipe is formed in the indentation material ejection hole 31 in all directions, the indentation material ejection hole formed in all directions are at least two stages indentation pipe for the lower vessel reflux tube. 제1항 또는 제2항에 있어서, 상기 압입관에 형성된 압입재분출공에는 압입재가 분사되는 분기관(41)이 설치되고 그 분기관은 압입재공급파이프(40)가 설치된 것을 특징으로 하는 베셀하부조 환류관용 압입관.[3] The vessel according to claim 1 or 2, wherein the press fitting material ejection hole formed in the press fitting pipe is provided with a branch pipe 41 through which the press material is injected, and the branch pipe is provided with a press fitting material supply pipe 40. Indentation pipe for the bottom reflux pipe. 제1항에 있어서, 상기 압입관의 외주연에는 적어도 2줄 이상의 환테(32)가 돌출되게 형성된 것을 특징으로 하는 베셀하부조 환류관용 압입관.According to claim 1, wherein the outer periphery of the indentation pipe at least two lines of the ring frame 32 is characterized in that the indentation pipe for the lower vessel reflux tube, characterized in that formed.
KR1020010055829A 2001-09-11 2001-09-11 Pressure joint pipe for lower part of the vessel reflux pipe KR100812142B1 (en)

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