KR20030014906A - Apparatus to maintain temperature uniformly at the under part of muffle for annealing furnace - Google Patents

Apparatus to maintain temperature uniformly at the under part of muffle for annealing furnace Download PDF

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Publication number
KR20030014906A
KR20030014906A KR1020010048802A KR20010048802A KR20030014906A KR 20030014906 A KR20030014906 A KR 20030014906A KR 1020010048802 A KR1020010048802 A KR 1020010048802A KR 20010048802 A KR20010048802 A KR 20010048802A KR 20030014906 A KR20030014906 A KR 20030014906A
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South Korea
Prior art keywords
muffle
annealing furnace
furnace
furnace body
annealing
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KR1020010048802A
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Korean (ko)
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KR100590714B1 (en
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은종현
신재석
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주식회사 포스코
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/02—Casings; Linings; Walls characterised by the shape of the bricks or blocks used
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/05004—Special materials for walls or lining

Abstract

PURPOSE: A device for maintaining temperature uniformly at the lower part of muffle for annealing furnace is provided to prevent abnormal stretching of the lower part of the muffle for the annealing furnace. CONSTITUTION: In an annealing furnace into which a muffle(12) is penetrated, and at one side of which an exhaust pipe(16) for combustion gas is installed, the device for maintaining temperature uniformly at the lower part of the muffle for annealing furnace comprises refractory wall(22) which is installed at the circumference of the muffle from the bottom of the furnace body(10) of the annealing furnace, wherein the exhaust pipe is inclined upward from the furnace body of the annealing furnace, and the exhaust pipe is installed along a tangent line on the circumferential surface of the furnace body from the furnace body of the annealing furnace.

Description

소둔로머플 하부의 균일온도 유지장치{APPARATUS TO MAINTAIN TEMPERATURE UNIFORMLY AT THE UNDER PART OF MUFFLE FOR ANNEALING FURNACE}Uniform temperature maintaining device at the bottom of annealing furnace muffle {APPARATUS TO MAINTAIN TEMPERATURE UNIFORMLY AT THE UNDER PART OF MUFFLE FOR ANNEALING FURNACE}

본 발명은 냉연공장의 광휘소둔라인에 설치되는 소둔로에 관한 것으로, 특히 소둔로 머플 하부의 온도를 균일하게 유지시키는 소둔로머플 하부의 균일온도 유지장치에 관한 것이다.The present invention relates to an annealing furnace installed in the bright annealing line of the cold rolling mill, and more particularly, to an apparatus for maintaining a uniform temperature under the annealing furnace muffle to keep the temperature of the annealing furnace muffle lower.

일반적으로 냉연공장의 광휘소둔라인은 거울과 같은 광택을 가지는 표면이 미려한 강판을 생산하는 라인으로 강판의 표면이 산화되는 것을 방지하기 위하여 수소를 포함하고 있는 환원성분위기에서 강판을 열처리한다.In general, the bright annealing line of the cold rolling mill is a line for producing a steel plate with a mirror-like gloss, and heat-treat the steel plate in a reducing atmosphere containing hydrogen in order to prevent the surface of the steel sheet from being oxidized.

특히 스테인레스의 경우에는 스테인레스가 고가이므로 스테인레스 냉연강판을 광휘소둔하여 제품의 부가가치를 증대시킨다.In particular, stainless steel is expensive, so the stainless cold rolled steel sheet is brightly annealed to increase the added value of the product.

광휘소둔라인에 사용되는 소둔로는 스트립의 간섭을 최소화하고 노압을 안정된 상태로 유지하기 위해서 업히트방식(Up-Heat Type)인 수직로 방식의 소둔로가 주로 사용되고 있다.The annealing furnace used in the bright annealing line is mainly used an up-heat type annealing furnace in order to minimize the interference of the strip and keep the furnace pressure stable.

이와 같은 소둔로에는 도 4에 도시된 바와 같이 노체(80)가 수직으로 설치되고, 노체(80)의 벽에는 다수개의 버너가 설치되어 노의 내부를 가열한다.In this annealing furnace, the furnace body 80 is vertically installed as shown in FIG. 4, and a plurality of burners are installed on the wall of the furnace body 80 to heat the inside of the furnace.

이 때 발생된 연소가스가 스트립(S)과 직접 접촉되는 것을 방지하기 위하여 노체(80)를 관통하는 머플(82)이 설치된다.In order to prevent the combustion gas generated at this time from directly contacting the strip S, a muffle 82 penetrating the furnace body 80 is installed.

여기서 머플(82)은 원통형으로 연소가스에 의한 열팽창시 아래쪽으로 연신되도록 설치된다.Here, the muffle 82 is cylindrically installed to extend downward when thermal expansion by the combustion gas.

또한 수소가스를 포함한 환원성분위기가스의 누출을 방지하기 위하여 노체(80)의 상부에 상부씰이 설치되며 하부에는 인렛씰박스(84)가 설치된다.In addition, the upper seal is installed on the upper portion of the furnace body 80 to prevent leakage of reducing component gas containing hydrogen gas, and the inlet seal box 84 is installed on the lower portion.

그리고 인렛씰박스(84)와 노체(80) 사이에는 폐가스를 배출하기 위한 배출구(86)가 노체의 바닥으로부터 설치된다.And between the inlet seal box 84 and the furnace body 80, an outlet 86 for discharging waste gas is installed from the bottom of the furnace body.

이와 같은 소둔로에서는 버너의 자동점화장치나 온도 콘트롤러에 이상이 발생되거나 온도 세팅치가 변할 경우 노체(80)와 머플(82)사이에 형성된 연소실의 온도가 급격히 변화하게 된다.In such an annealing furnace, when an abnormality occurs in the burner's automatic ignition device or the temperature controller or the temperature setting value is changed, the temperature of the combustion chamber formed between the furnace body 80 and the muffle 82 is rapidly changed.

따라서 급격히 온도가 변화된 연소가스는 배출구(86)를 통과하여 외부로 배출된다.Therefore, the combustion gas whose temperature is rapidly changed is discharged to the outside through the outlet (86).

이 때 배출되는 연소가스는 배출구를 통과하므로 머플 배출구 주위만 연신량이 증대되어 머플의 하부가 변형을 일으켜 국부적으로 찌그러지는 현상이 발생된다.At this time, since the discharged gas passes through the discharge port, the amount of stretching is increased only around the muffle outlet, causing the lower part of the muffle to be deformed and locally crushed.

따라서 머플하부가 국부적으로 찢어져 주변설비를 적열시키는 적열현상이 발생되어 유지보수비가 증대되는 문제점이 있다.Therefore, there is a problem in that the muffled lower portion is locally torn to cause a glowing phenomenon to heat the peripheral equipment, thereby increasing the maintenance cost.

이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 그 목적은 소둔로머플 하부의 연신을 균등하게 할 수 있는 소둔로머플 하부의 균일온도 유지장치를 제공하는 데 있다.Accordingly, the present invention has been made to solve the above problems, an object of the present invention to provide a uniform temperature maintenance device of the lower annealing furnace muffler that can equalize the stretching of the lower annealing furnace muffle.

도 1은 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치를 나타내는 부분절개사시도,1 is a partial cutaway perspective view showing a uniform temperature maintaining device of the annealing furnace muffle lower according to the present invention,

도 2는 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치가 설치된 소둔로를 나타내는 단면도,Figure 2 is a cross-sectional view showing an annealing furnace is installed a uniform temperature maintaining device of the lower annealing furnace muffle in accordance with the present invention

도 3은 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치의 내화벽돌의 설치상태를 나타내는 상태도,Figure 3 is a state diagram showing the installation state of the refractory brick of the uniform temperature maintaining device of the annealing furnace muffle lower portion according to the present invention,

도 4는 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치를 나타내는 단면도.Figure 4 is a cross-sectional view showing a uniform temperature maintaining device of the annealing furnace muffle lower in accordance with the present invention.

도 5는 종래기술에 따른 소둔로의 단면도.5 is a cross-sectional view of the annealing furnace according to the prior art.

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

10 : 노체 12 : 머플10: body 12: muffle

14 : 버너 16 : 배출관14 burner 16 discharge pipe

18 : 상부씰 20 : 인렛씰박스18: upper seal 20: inlet seal box

22 : 내화벽 23 : 내화벽돌22: fireproof brick 23: fireproof brick

S : 스트립S: strip

상기한 바와 같은 목적을 달성하기 위하여 본 발명은, 내부에 머플이 관통되고 일측으로 연소가스의 배출관이 설치되는 소둔로에 있어서, 소둔로의 노체 바닥으로부터 머플 주위에 설치되는 내화벽을 포함하는 것을 특징으로 하는 소둔로머플 하부의 균일온도 유지장치.In order to achieve the above object, the present invention, in the annealing furnace in which the muffle penetrates inside and the exhaust pipe of the combustion gas is installed to one side, comprising a fireproof wall installed around the muffle from the bottom of the furnace body of the annealing furnace A uniform temperature maintaining device under the annealing furnace muffle.

여기서 배기관은 소둔로의 노체로부터 상향경사지며 노체의 접선에 예각을 이루도록 설치되는 것을 특징으로 한다.Here, the exhaust pipe is inclined upward from the furnace body of the annealing furnace and is installed to form an acute angle at the tangent of the furnace body.

이하 본 발명에 대한 일실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치를 나타내는 부분절개사시도이고, 도 2는 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치가 설치된 소둔로를 나타내는 단면도이며, 도 3은 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치의 내화벽돌의 설치상태를 나타내는 상태도이다.1 is a partial cutaway perspective view showing a uniform temperature maintaining device of the annealing furnace muffle lower portion according to the present invention, Figure 2 is a cross-sectional view showing an annealing furnace is installed a uniform temperature maintaining device of the annealing furnace muffle lower portion according to the present invention, Figure 3 Is a state diagram showing the installation state of the refractory brick of the uniform temperature maintaining device of the annealing furnace muffle lower portion according to the present invention.

상기한 도면에 의하면 소둔로는 노체(10)가 수직으로 설치되고, 이 노체(10)와 평행하게 노체(10)의 내부를 관통하는 머플(12)이 설치된다.According to the above drawings, the annealing furnace has a furnace body 10 installed vertically, and a muffle 12 penetrating the inside of the furnace body 10 in parallel with the furnace body 10 is provided.

그리고 노체(10)의 벽에는 다수개의 버너(14)가 설치되고, 이 버너(14)에 의해 발생되는 연소열에 의해 스트립을 소둔시킨다.A plurality of burners 14 are installed on the wall of the furnace body 10, and the strips are annealed by the heat of combustion generated by the burners 14.

또한 머플(12) 내부의 수소가스가 포함된 환원성가스의 누출을 방지하기 위하여 머플(12)의 상부에는 상부씰(18)이 설치되고, 하부에는 인렛씰박스(20)가 설치된다.In addition, in order to prevent leakage of reducing gas containing hydrogen gas in the muffle 12, an upper seal 18 is installed at an upper part of the muffle 12, and an inlet seal box 20 is installed at a lower part of the muffle 12.

본 발명의 특징에 따른 소둔로머플 하부의 균일온도 유지장치는 소둔로의 노체(10) 바닥으로부터 머플(12) 주위에 내화벽(22)이 설치된다.In the uniform temperature maintaining device under the annealing furnace muffle according to the characteristics of the present invention, a fireproof wall 22 is installed around the muffle 12 from the bottom of the furnace body 10 of the annealing furnace.

내화벽(22)은 노체(10)의 바닥으로부터 고온에도 견디는 내화벽돌(23)을 다수개의 단으로 축조하여 설치된다.The fireproof wall 22 is constructed by constructing a firebrick 23 that can withstand high temperatures from the bottom of the furnace body 10 in a plurality of stages.

이러한 내화벽돌(23)은 1700℃에서도 견딜 수 있는 초내열성으로 일측으로는 돌기(23a)가 타측으로는 요홈(23b)이 형성되어 이 요홈(23b)과 돌기(23a)가 각각 끼워 맞추어져 조립된다.The refractory brick 23 is extremely heat resistant to withstand at 1700 ° C. The protrusion 23a is formed on one side and the groove 23b is formed on the other side, so that the groove 23b and the protrusion 23a are fitted to each other. do.

또한 최하단의 내화벽돌(23)에는 노체(10) 바닥에 형성된 가이드로드(24)에 대응되도록 홈(26)이 형성되고, 측면에는 내화벽돌(23)간의 접착력을 증대시키기 위해 접착제가 도포된다.In addition, the lowermost refractory brick 23 is formed with a groove 26 so as to correspond to the guide rod 24 formed on the bottom of the furnace body 10, and an adhesive is applied to the side to increase the adhesive force between the refractory brick 23.

더불어 내화벽돌(23) 사이에는 외측으로부터 파이버플라스트가 삽입되어 내화벽(22)의 내측에서 외측으로 발생되는 열기에 의해서 내화벽(22)이 전도되는 것을 방지하게 된다.In addition, the fiber blast is inserted from the outside between the refractory bricks 23 to prevent the fire walls 22 from being conducted by heat generated from the inside of the fire walls 22 to the outside.

한편 본 발명의 특징에 따른 배출관(16)은 소둔로의 노체(10)에서 상향경사지게 설치된다.Meanwhile, the discharge pipe 16 according to the characteristics of the present invention is installed to be inclined upwardly in the furnace body 10 of the annealing furnace.

여기서 배출관(16)은 노체(10)에 약 45°상향 경사지도록 설치는 것이 바람직하다.Here, the discharge pipe 16 is preferably installed so as to be inclined upward by 45 ° to the furnace body 10.

따라서 연소가스가 노체(10)의 내부에서 나선형으로 회전하면서 흐르게 되며, 이 흐름에 따라 노체(10) 내부의 연소가스가 혼합되어 노체(10) 하부의 온도가 균일하게 된다.Therefore, the combustion gas flows while rotating spirally inside the furnace body 10, and the combustion gas inside the furnace body 10 is mixed according to this flow, so that the temperature of the lower portion of the furnace body 10 is uniform.

또한 본 발명의 특징에 따른 배출관(16)은 소둔로의 노체(10)에서 노체(10)의 원주면 접선을 따라 설치된다.In addition, the discharge pipe 16 according to the characteristics of the present invention is installed along the circumferential surface tangent of the furnace body 10 in the furnace body 10 of the annealing furnace.

따라서 연소가스가 노체(10)의 내부에서 나선형으로 더욱 회전하면서 흐르게되며, 이 흐름에 따라 노체(10) 내부의 연소가스가 혼합되어 노체(10) 하부의 온도가 균일하게 된다.Therefore, the combustion gas flows while rotating more spirally in the interior of the furnace body 10, and the combustion gas inside the furnace body 10 is mixed with this flow, so that the temperature of the lower part of the furnace body 10 is uniform.

이와 같은 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치의 작용은 다음과 같다.As described above, the action of the uniform temperature maintaining device under the annealing furnace muffle according to the present invention is as follows.

머플(12)의 내부에는 스트립(S)이 통과하고, 이 스트립(S)을 가열하기 위하여 노체(10)의 벽에 설치된 버너(14)를 점화시키면 머플(12)과 노체(10) 사이의 공간에 연소가스가 발생된다.A strip S passes through the muffle 12, and when the burner 14 installed on the wall of the furnace 10 is ignited to heat the strip S, the muffle 12 and the furnace 10 are separated. Combustion gas is generated in the space.

이 연소가스는 머플(12)을 가열하게 되고, 가열된 머플(12)은 머플(12)의 내부를 관통하는 스트립(S)을 가열하게 된다.The combustion gas heats the muffle 12, and the heated muffle 12 heats the strip S penetrating the interior of the muffle 12.

한편 연소가스는 점차 하강하면서 노체(10)의 바닥에 형성된 배출구(16)를 통하여 배출된다.On the other hand, the combustion gas is gradually discharged through the discharge port 16 formed in the bottom of the furnace body 10.

이 때 배출구(16)는 노체(10)의 바닥에 상향경사지게 설치되고, 노체(10)에서 노체(10) 원주면 접선을 따라 형성되어 있으므로 배기가스는 나선형으로 회전하면서 흘러 혼합되어 외부로 배출된다.At this time, the discharge port 16 is installed on the bottom of the furnace body 10 inclined upwardly, and is formed along the circumference of the furnace body 10 circumferential surface in the furnace body 10 so that the exhaust gas flows while rotating in a spiral and is discharged to the outside. .

이와 같이 나선형으로 연소가스가 회전하면서 흐르게 되면 각 부분의 연소가스가 혼합되어 노체(10) 하부 각 부분의 온도가 균일하게 된다.When the combustion gas flows in a spiral manner as described above, the combustion gases of the respective parts are mixed, so that the temperature of each part of the lower part of the furnace 10 is uniform.

따라서 버너(14)의 자동점화장치나 온도 콘트롤러에 이상이 발생되거나 온도 세팅치가 변할 경우에도 연소가스가 혼합되어 머플(12) 하부의 온도가 균일하게 된다.Accordingly, even when an abnormality occurs in the automatic ignition device or the temperature controller of the burner 14 or the temperature setting value is changed, the combustion gas is mixed to make the temperature of the lower portion of the muffle 12 uniform.

이로 인해 머플(12) 하부는 균일하게 연신되므로 머플(12) 하부가 찢어지는것이 방지된다.As a result, the lower portion of the muffle 12 is uniformly stretched, thereby preventing the lower portion of the muffle 12 from being torn.

이와 같은 본 발명에 따른 소둔로머플 하부의 균일온도 유지장치는 소둔로에서 발생된 연소가스를 나선형으로 회전시켜 배출시키므로 노 내부의 온도차가 줄어든다.As described above, the uniform temperature maintaining device in the lower part of the annealing furnace muffle according to the present invention rotates and discharges the combustion gas generated in the annealing furnace to reduce the temperature difference in the furnace.

따라서 노내부의 온도차로 인한 소둔로머플 하부의 비정상적 연신이 방지된다.Therefore, abnormal stretching of the lower part of the annealing furnace muffle due to the temperature difference in the furnace is prevented.

이로 인해 소둔로머플 하부의 찢어짐이 방지되어 주변설비가 보호되므로 유지보수비를 절감할 수 있다.This prevents tearing of the lower part of the annealing furnace muffle, thereby protecting the peripheral equipment, thereby reducing maintenance costs.

Claims (3)

내부에 머플이 관통되고 일측으로 연소가스의 배출관이 설치되는 소둔로에 있어서,In the annealing furnace in which a muffle penetrates inside and a discharge pipe of combustion gas is installed at one side, 상기 소둔로의 노체 바닥으로부터 머플 주위에 설치되는 내화벽을 포함하는 것을 특징으로 하는 소둔로머플 하부의 균일온도 유지장치.And a fireproof wall installed around the muffle from the bottom of the furnace body of the annealing furnace. 제 1 항에 있어서,The method of claim 1, 상기 배출관은 상기 소둔로의 노체에서 상향경사지게 설치되는 것을 특징으로 하는 소둔로머플 하부의 균일온도 유지장치.The discharge pipe is a uniform temperature maintenance device of the lower annealing furnace muffler, characterized in that installed inclined upward in the furnace body of the annealing furnace. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 배출관은 상기 소둔로의 노체에서 상기 노체의 원주면 접선을 따라 설치되는 것을 특징으로 하는 소둔로머플 하부의 균일온도 유지장치.The discharge pipe is a uniform temperature maintenance device of the lower annealing furnace muffle, characterized in that is installed along the circumferential surface tangent of the furnace body in the furnace body of the annealing furnace.
KR1020010048802A 2001-08-13 2001-08-13 Apparatus to maintain temperature uniformly at the under part of muffle for annealing furnace KR100590714B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070114490A (en) * 2006-05-29 2007-12-04 주식회사 포스코 A structure for preventing part concentration deformation of muffle for vertical annealing furnace
KR100931484B1 (en) * 2007-08-13 2009-12-11 주식회사 포스코 Vertical annealing furnace
KR101634081B1 (en) * 2014-12-24 2016-06-28 주식회사 포스코 Apparatus for preventing part concentration defomation of muffle for vertical annealing fumace

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KR880000469B1 (en) * 1982-02-11 1988-04-07 다께다 도요시 Annealing furnaces
JP2567130B2 (en) * 1990-05-07 1996-12-25 日本冶金工業株式会社 Bright annealing furnace
JPH04210431A (en) * 1990-11-30 1992-07-31 San Furness Kk Heating furnace of vertical annealing furnace
JPH07102326A (en) * 1993-09-30 1995-04-18 Daido Steel Co Ltd Continuous annealing furnace for metal strip
JP3356864B2 (en) * 1994-03-31 2002-12-16 中外炉工業株式会社 Heating zone of vertical continuous bright annealing furnace for steel strip
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070114490A (en) * 2006-05-29 2007-12-04 주식회사 포스코 A structure for preventing part concentration deformation of muffle for vertical annealing furnace
KR100931484B1 (en) * 2007-08-13 2009-12-11 주식회사 포스코 Vertical annealing furnace
KR101634081B1 (en) * 2014-12-24 2016-06-28 주식회사 포스코 Apparatus for preventing part concentration defomation of muffle for vertical annealing fumace

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