WO2020196589A1 - 高炉の炉壁冷却用ステーブ - Google Patents
高炉の炉壁冷却用ステーブ Download PDFInfo
- Publication number
- WO2020196589A1 WO2020196589A1 PCT/JP2020/013231 JP2020013231W WO2020196589A1 WO 2020196589 A1 WO2020196589 A1 WO 2020196589A1 JP 2020013231 W JP2020013231 W JP 2020013231W WO 2020196589 A1 WO2020196589 A1 WO 2020196589A1
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- WIPO (PCT)
- Prior art keywords
- stave
- horizontal
- furnace
- vertical
- liners
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/24—Cooling arrangements
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
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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
- C21C5/44—Refractory linings
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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
- C21C5/4646—Cooling arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/14—Supports for linings
Definitions
- the present invention relates to a furnace wall cooling stave used for cooling and protecting a furnace wall of a blast furnace or the like exposed to high temperature.
- a furnace wall cooling stave (hereinafter, also referred to as a stave) has been used to protect the blast furnace body from the heat load inside the furnace.
- the stave has a stave body made of cast iron, rolled copper, cast copper, or the like, and the stave body has a water channel for cooling.
- Members for attaching the stave to the blast furnace and members made of metal or refractory different from the stave body may be attached to the surface of the stave body, and they were attached to the stave body, waterway, and stave body.
- the whole body including the members is called a stave.
- a stave with higher cooling capacity and durability has been required.
- Such a furnace wall cooling stave is fixedly attached to the inside of the blast furnace body using a furnace body iron skin and bolts. That is, as shown in FIG. 5, the stave main body 51 is fixed to the iron skin 61 of the blast furnace body by screwing using bolts 52 and nuts 53.
- the water supply / drainage pipes 54-1 and 54-2 of the stave main body 51 are provided through the holes 62 formed in the iron skin 61 of the blast furnace body, and the water supply / drainage pipes 54-1 and 54-2 are provided. Water is supplied and drained from the outside of the furnace body.
- Patent Document 1 when a vertical groove is provided among a plurality of grooves that release the elongation due to heat reception from the inside of the furnace and prevent deformation, there is an air flow that rises along the vertical groove. As a result, the slag fixing layer is eliminated by the air flow, and the slag fixing layer is not formed in the portion where the vertical groove exists, and the heat input from the portion to the stave becomes large. Therefore, even if a structure is adopted in which strain due to heat is absorbed by a groove penetrating vertically, there is a problem that the temperature is rather raised because heat is received from the inner surface of the groove, and the effect of strain absorption is diminished.
- An object of the present invention is a furnace wall cooling stave used for cooling and protecting a furnace wall of a blast furnace or the like exposed to high temperature, and in a furnace wall cooling stave provided with a liner inside the furnace, a liner. It is an object of the present invention to provide a blast furnace wall cooling stave that can prevent the temperature rise of the blast furnace and extend the life of the liner.
- the present invention is a furnace wall cooling stave that cools the furnace wall of a blast furnace from the inner surface, and a stave main body made of copper or a copper alloy and a stave main body inside the stave main body are provided with a horizontal channel through which cooling water passes.
- a plurality of horizontal grooves horizontally provided on the surface which are perpendicular to a concave portion composed of a plurality of horizontal grooves and a horizontal groove forming a convex portion formed between the plurality of horizontal grooves, and a convex portion between the horizontal grooves. It is provided with a plurality of vertical grooves provided in the direction and a plurality of liners that are fitted in the horizontal grooves of the stave body and whose tips protrude into the furnace, and a vertical gap between the plurality of liners.
- a blast furnace wall cooling stave characterized in that is located at a different position in the horizontal direction from the vertical groove.
- a female screw hole is provided at a position corresponding to the bolt hole at the bottom of the horizontal groove of the stave body, and the counterbore and the counterbore are provided.
- the liner is fitted and provided in the horizontal groove by inserting the bolt from the inside of the furnace through the bolt hole and fixing the bolt to the female screw hole.
- the vertical width of the concave portion is larger than the vertical width of the convex portion.
- the material of the liner is made of a material having higher high temperature strength than the material of the stave body.
- the gaps between the liners adjacent to the top and bottom should be different in the horizontal direction.
- the vertically adjacent vertical grooves should be positioned differently in the horizontal direction.
- the gaps between the liners adjacent to the top and bottom should be displaced in the horizontal direction, and the vertical grooves adjacent to the top and bottom should be displaced in the horizontal direction. Is considered to be a more preferable solution.
- the liner protrudes into the furnace, the tip of the convex portion between the horizontal grooves between the liners and the base of the liner (the liner fits into the concave portion of the stave body).
- a slag fixing layer having a low thermal conductivity is also formed and maintained in the vicinity of the portion where the slag is formed. As a result, the temperature rise of the liner can be prevented and the life of the liner can be extended.
- the vertical gap between the liners is set at a position different from the vertical groove provided on the convex part of the stave body so that the groove does not communicate in the vertical direction, so that the airflow rising along the vertical groove is hindered and the slag fixing layer is formed. It is possible to extend the life of the liner and the stave by hindering the heat reception from the gap between the liners and the inner surface of the vertical groove.
- a bolt hole penetrating from the inside of the furnace of the liner and the inside of the counterbore is provided, and a female screw hole is provided at a position corresponding to the bolt hole at the bottom of the horizontal groove of the stave body.
- a slag fixing layer is formed in the counterbore, and the stave body is effectively cooled by the liner and the stave body that fits on the bottom surface of the upper surface, so the bolt will not be worn even after long-term use. ..
- the airflow is prevented from passing through the gaps between the liners, and the airflow is prevented.
- the life of the liner can be extended by preventing the removal of the slag fixing layer due to the above and preventing the heat reception from the vertical gap between the liners and the inner surface of the vertical groove.
- by shifting the positions of the vertically adjacent vertical grooves the vertical grooves are prevented from penetrating through and the airflow is prevented from passing through, so that the slag fixing layer due to the airflow is formed.
- FIG. 3 is a cross-sectional view taken along the line AA of the stave before mounting the liner shown in FIG. It is a figure for demonstrating the method of fixing the furnace wall cooling stave in the conventional example to a furnace body iron skin.
- the furnace wall cooling stave of the blast furnace of the present invention is provided with a water channel through which cooling water passes and a stave body made of copper or a copper alloy; a plurality of stave bodies are provided so as to extend horizontally on the inner surface of the furnace.
- It is provided with a plurality of vertical grooves; and a plurality of liners that are fitted in the horizontal grooves of the stave body and whose tips protrude into the furnace; and extend vertically between the plurality of liners. It is configured so that the gap is located at a different position in the horizontal direction from the vertical groove, that is, the gap extending in the vertical direction between the plurality of liners does not communicate with the vertical groove.
- Preventing the gap from communicating with the groove means that either the upper end or the lower end of the groove is closed in the vertical direction by the liner, and the space forming the groove is open only in the direction of the inner surface of the furnace. Point to. In the present invention, it is preferable that 70% or more of the upper and lower ends of the grooves existing in the stave body are closed. It is more preferable that 90% or more of the upper and lower ends of the groove are closed by the liner, and most preferably it is closed at all positions.
- the stave In the steve that cools the furnace wall of the blast furnace from the inner surface by blowing high temperature air from the lower part of the blast furnace and extracting the generated gas from the upper part, when the speed of the upward gas flow along the stave surface increases, the inner surface of the stave The heat transfer rate of the gas increases and the temperature of the stave tends to rise.
- the blast furnace wall cooling stave of the present invention having the above-described configuration, since the stave is made of copper or a copper alloy having high thermal conductivity, the furnace inner slag is cooled on the furnace inner surface of the stave to form a fixed layer. .. As a result, the stave itself can be protected for a long period of time. Further, in the furnace wall cooling stave of the blast furnace of the present invention, water is flowed through a cooling water passage provided in the stave main body to cool the stave.
- the horizontal groove of the stave body is provided with a liner that fits into the bottom surface of the upper surface and the lower surface of the stave body and the tip of which protrudes into the furnace. It is preferable that the liner material has higher hardness and high temperature strength and lower thermal conductivity than the stave material. Therefore, it can withstand a temperature higher than that of the stave body and can reduce the heat transferred to the stave body.
- a slag fixing layer having a low thermal conductivity is formed and maintained at the tip of the protrusion between the horizontal grooves between the liners and the base of the liner.
- the base where the liner is fitted to the horizontal groove of the stave is cooled by the stave and maintained at a low temperature, but the tip protruding into the furnace receives the heat inside the furnace and becomes hot.
- a groove is provided in the convex portion adjacent to the horizontal groove of the stave body so as to intersect the extending direction of the convex portion.
- This groove has a horizontal groove existing at the upper end and the lower end of the convex portion or an opening connected to the end of the stave, and is provided so as to connect the openings to each other.
- the groove provided in the convex portion is referred to as a vertical groove, but the groove is not limited to the direction of 90 ° in the extending direction of the convex portion. The presence of this groove can alleviate the deformation caused by the thermal stress generated in the stave body due to the temperature change.
- the width of the vertical groove is preferably 1 mm or more and 50 mm or less.
- the depth of the vertical groove can be the same as that of the horizontal groove, but it is effective even in a groove shallower than that. It is preferable that the groove has a depth of 1/2 or more of the protruding height of the convex portion (distance between the upper end of the convex portion and the bottom surface of the groove). A more preferable groove depth is about 3/4 to 1 times the protruding height of the convex portion.
- the vertical grooves provided in the convex portion are preferably provided at intervals of 100 mm to 500 mm in the horizontal direction. Further, it is more preferable that the vertical groove spacing is 150 mm to 300 mm according to the pitch of the cooling water channel.
- the liner fitted in each horizontal groove is divided into a plurality of lines, and the vertical gap between the liners absorbs thermal expansion. If the gap between the liners is in the same vertical position as the vertical groove of the stave body, the gap and the vertical groove penetrate and the air flow passes through. Therefore, the slag fixing layer is eliminated by the air flow, and heat is received from the gap between the liners and the inner surface of the vertical groove, so that the temperature rises.
- the positions of the gaps between the liners and the positions of the vertical grooves to different positions in the horizontal direction, it is possible to prevent the air flow from passing through and effectively absorb the thermal expansion.
- the bolt itself is cooled by the female screw hole of the stave body, and a slag fixing layer having low thermal conductivity is formed in the counterbore, so that the temperature rise of the bolt can be avoided.
- the counterbore hole in the liner is deeper outside the furnace than the tip of the convex part between the horizontal grooves of the stave, and the position of the bolt is effectively cooled by the stave body that fits on the three sides of the liner and the bottom surface of the upper surface. Therefore, the temperature rise of the bolt can be avoided, and the bolt will not be worn even after long-term use.
- the liner fixing method of the present invention it is possible to effectively prevent the liner from falling off or being damaged as compared with the conventional liner fixing method, and the life of the liner can be significantly extended. As a result, the life of the stave can be significantly extended.
- the stave body it is preferable to configure the stave body so that the vertical width of the concave portion is larger than the vertical width of the convex portion.
- the convex portion between the horizontal grooves directly receives the heat in the furnace and becomes higher than the temperature of the horizontal groove, so the width is made smaller than the concave portion to reduce the amount of heat received by the convex portion. be able to.
- the liner protrudes into the furnace from the tip of the convex portion between the horizontal grooves of the stave, a slag fixing layer having low thermal conductivity is formed in the gap between the liners adjacent to the top and bottom.
- the liner material is composed of a material having higher high temperature strength than the material of the stave body.
- a material having higher high temperature strength than the stave body made of copper or a copper alloy, stainless steel, SS steel and the like can be preferably used.
- the gap between the liners is preferably 5 mm or more and 500 mm or less.
- Different horizontal positions of the gaps between the liners mean that the liners are placed so that the protrusions of the adjacent liners are located just above and / or just below the gaps between the liners at a certain height. Is. Therefore, the gap between the liners is preferably shorter than the length of the liner arranged in the groove. In a gap of 70% or more of the number of gaps between liners, it is preferable that the gap is different from the gap between vertically adjacent liners in the horizontal direction.
- a slag fixing layer with low thermal conductivity is formed in the horizontal groove of the stave body.
- the vertical grooves are prevented from penetrating through and the airflow is prevented from passing through, and the slag fixing layer is prevented from being eliminated by the airflow, and the inner surface of the vertical groove is prevented. It is possible to prevent heat reception from.
- the horizontal positions of the vertically adjacent vertical grooves means that the convex portion of the stave body adjacent to the opening of the vertical groove is located immediately above and / or immediately below the convex portion of the stave body at a certain height. It is to arrange the vertical groove so as. Even in this case, it is preferable that the horizontal position of the vertical groove is different from the position of the vertical groove of the adjacent convex portion in 70% or more of the vertical grooves.
- the slag is provided by providing both the above-mentioned horizontal positions of the gaps between the vertically adjacent liners and the above-mentioned horizontal positions of the vertically adjacent vertical grooves. It is possible to prevent the sticking layer from being eliminated more effectively.
- FIG. 1 is a view of an example of the furnace wall cooling stave of the blast furnace of the present invention as viewed from the inside of the furnace
- FIG. 2 shows the line AA of the furnace wall cooling stave of the blast furnace of the present invention shown in FIG. It is a cross-sectional view along.
- FIGS. 1 and 2 show the configuration of the furnace wall cooling stave of the blast furnace of the present invention.
- a large number of stave main bodies 1 are arranged in the circumferential direction of the blast furnace, and oxygen-free copper is used as an example of the material.
- a plurality of liners 2 are fitted into the horizontal groove 13 dug in the stave body 1 by cutting with a vertical (vertical direction) gap 5 between the liners 2, and a hexagon socket head bolt 3 Is concluded by.
- the depth 13a is 55 mm
- the width in the vertical direction is 75 mm at the bottom 13b
- 70 mm at the opening 13c which is a wide trapezoidal shape at the back. Therefore, the liner 2 fitted in the horizontal groove 13 does not come off.
- the width of the vertical gap 5 between the liners 2 does not change due to an external force, and as an example, the initial 10 mm is used. Can be maintained.
- the concave portion 21 is formed by the horizontal groove 13, and the convex portion 22 is formed between the upper and lower horizontal grooves 13.
- a plurality of vertical grooves 4 are formed in the formed convex portion 22 by cutting to, for example, a width of 10 mm and a depth of 55 mm.
- the plurality of vertical grooves 4 are all arranged at positions laterally displaced from the vertical gap 5 between the liners 2. Therefore, in the furnace of the blast furnace, the vertically rising airflow does not pass through, and the slag fixing layer formed on the inner surface of the furnace is maintained in the liner 2.
- the horizontal position of the vertical gap 5 of the liners 2 adjacent to the top and bottom and the horizontal position of the vertical groove 4 adjacent to the top and bottom are not particularly limited.
- the vertical gaps 5 of the vertically adjacent liners 2 are configured to be displaced in the horizontal direction.
- the vertical gap 5 of the liner 2 is configured in this way, it is possible to more preferably prevent the passage of the vertically rising airflow when the liner 2 is present.
- the upper and lower vertical grooves 4 are in positions displaced in the horizontal direction, so that the airflow rising vertically can be generated. It does not pass through, and the slag fixing layer formed on the inner surface of the furnace is maintained.
- FIG. 2 is a cross-sectional view taken along the line AA of the furnace wall cooling stave of the blast furnace of the present invention shown in FIG.
- a horizontal groove 13 having a wider bottom is dug in the stave body 1 which is a plate of a copper product having a predetermined thickness.
- the cooling water passage 6 arranged in the vertical direction of the stave is drilled upward by a gun drill from the lower end surface of the plate and is stopped without penetrating. In this state, the water supply port 7 and the drainage port 8 are opened in the cooling water passage 6 from the back surface, which is the outside of the stave, with the same diameter as the cooling water passage 6.
- the water supply port 7 is a water supply pipe 9 that penetrates the iron skin of the blast furnace to supply cooling water from outside the furnace
- the drainage port 8 is a drain pipe 10 that penetrates the iron skin of the blast furnace and discharges the cooling water to the outside of the furnace.
- the liner 2 is inserted horizontally along the horizontal groove 13 dug in the stave body 1 and is fastened by the bolt 3 at a predetermined position. Since the bolt 3 is located at the bottom of the counterbore 12, use a hexagon socket head cap screw and tighten it with a hexagon wrench. In the furnace, the slag fixing layer is also formed in the counterbore 12, so that the head of the bolt 3 can be protected.
- the counterbore 12 is formed deeper than the tip of the convex portion 22 between the horizontal grooves 13 so that the temperature of the bolt 3 does not rise.
- FIG. 3 is a view of an example of the stave before mounting the liner in the furnace wall cooling stave of the blast furnace of the present invention as viewed from the inside of the furnace
- FIG. 4 is a view of A of the stave before mounting the liner shown in FIG. It is sectional drawing along the-A line.
- a horizontal groove 13 is dug in the stave body 1 by milling.
- a female screw hole 14 for bolting the liner 2 with a bolt 3 is formed in the bottom of the horizontal groove 13 by tapping.
- the female screw hole 14 is provided at a position where the cooling water passage 6 is horizontally oriented so as not to penetrate the cooling water passage 6.
- a plurality of liners 2 fitted in the horizontal grooves 13 are sequentially inserted from the side.
- the centers of the female screw holes 14 and the counterbore holes 12 and the concentric bolt holes 23 coincide with each other, they are tightened by the bolts 3 to stop sliding along the horizontal groove 13.
- the blast furnace wall cooling stave according to the present invention is particularly effective as a stave for cooling the furnace wall of a blast furnace from the inner surface by blowing high temperature air from the lower part of the furnace and extracting generated gas from the upper part, but a shaft furnace other than the blast furnace. It is also effective as an application to cool and protect the inside of the furnace wall exposed to high temperature.
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Abstract
Description
(1)前記ライナの炉内側からざぐり穴およびざぐり穴内に貫通するボルト穴を設けると共に、前記ステーブ本体の水平溝の底部の前記ボルト穴に対応する位置にめねじ穴を設け、前記ざぐり穴および前記ボルト穴を介してボルトを炉内側から挿通して前記ボルトを前記めねじ穴に固定することにより、前記ライナを前記水平溝内に嵌合して設けたこと、
(2)前記凹部の垂直方向の幅が前記凸部の垂直方向の幅より大きくなるよう構成したこと、
(3)前記ライナの材質が前記ステーブ本体の材質よりも高温強度が高い材質からなること、
(4)上下に隣接する前記ライナの隙間は水平方向に位置を異ならせること、
(5)上下に隣接する前記垂直溝は水平方向に位置を異ならせること、
(6)上下に隣接する前記ライナの隙間は水平方向に位置を異ならせると共に、上下に隣接する前記垂直溝は水平方向に位置を異ならせること、
がより好ましい解決手段となるものと考えられる。
本発明の高炉の炉壁冷却用ステーブは:その内部に冷却水を通す水路を設けると共に銅または銅合金からなるステーブ本体と;ステーブ本体の炉内側表面に水平に延在するように複数設けられた水平溝であって、複数の水平溝で構成された凹部および複数の水平溝間に構成された凸部を構成する水平溝と;水平溝間の凸部に垂直方向に延在するように複数設けられた垂直溝と;ステーブ本体の水平溝に嵌合して設けられてその先端が炉内に突出する複数のライナと;を備えており、複数のライナ間の垂直方向に延在する隙間が垂直溝と水平方向において異なる位置になるように、すなわち複数のライナ間の垂直方向に延在する隙間が垂直溝と連通しないように構成されている。
まず、ライナがステーブ本体の水平溝に嵌合しているだけでは、使用中にライナの位置が水平方向に移動することにより、ライナ間の垂直方向の隙間の位置が垂直溝の位置になることがある。それを防止するとともに、ライナ間の隙間を一定に保持するために、ライナの炉内側にざぐり穴をあけ、ざぐり穴の底にボルト穴をあけ、ボルト穴にボルトを貫通させて、ステーブ本体の水平溝に設けためねじ穴に固定することで、ライナが水平方向に移動することを妨げることができる。ボルト自体はステーブ本体のめねじ穴によって冷やされ、ざぐり穴の中には熱伝導率の低いスラグ固着層が形成されるので、ボルトの温度上昇を避けることができる。さらに、ライナにあけるざぐり穴は、ステーブの水平溝間の凸部先端よりも炉外側に深くあけており、ボルトの位置はライナと上面下面底面の三面で嵌合するステーブ本体によって効果的に冷却されるため、ボルトの温度上昇を避けることができ、長期の使用によってもボルトが損耗することはない。本発明のライナの固定方法によれば、従来のライナの固定方法に比較して、ライナの脱落や破損を効果的に防ぐことができ、ライナの寿命を大幅に延ばすことができる。それにより、ステーブの寿命も大幅に延ばすことができる。
図1は、本発明の高炉の炉壁冷却用ステーブの一例を炉内側から見た図であり、図2は、図1に示す本発明の高炉の炉壁冷却用ステーブのA-A線に沿った断面図である。以下、図1および図2を参照して、本発明の高炉の炉壁冷却用ステーブの構成について説明する。
2 ライナ
3 六角穴付きボルト
4 垂直溝
5 隙間
6 冷却水通路
7 給水口
8 排水口
10 排水管
11 プラグ
12 ざぐり穴
13 水平溝
13a 深さ
13b 底部
13c 開口部
14 めねじ穴
21 凹部
22 凸部
23 ボルト穴
Claims (7)
- 高炉の炉壁を内面から冷却する炉壁冷却用ステーブであって、その内部に冷却水を通す水路を設けると共に銅または銅合金からなるステーブ本体と、ステーブ本体の炉内側表面に水平に複数設けられた水平溝であって、複数の水平溝で構成された凹部および複数の水平溝間に構成された凸部を構成する水平溝と、水平溝間の凸部に垂直方向に複数設けられた垂直溝と、ステーブ本体の水平溝に嵌合して設けられてその先端が炉内に突出する複数のライナと、を備えており、複数のライナ間の垂直方向の隙間が垂直溝と水平方向に異なる位置にあることを特徴とする、高炉の炉壁冷却用ステーブ。
- 前記ライナの炉内側からざぐり穴およびざぐり穴内に貫通するボルト穴を設けると共に、前記ステーブ本体の水平溝の底部の前記ボルト穴に対応する位置にめねじ穴を設け、前記ざぐり穴および前記ボルト穴を介してボルトを炉内側から挿通して前記ボルトを前記めねじ穴に固定することにより、前記ライナを前記水平溝内に嵌合して設けたことを特徴とする、請求項1に記載の高炉の炉壁冷却用ステーブ。
- 前記凹部の垂直方向の幅が前記凸部の垂直方向の幅より大きくなるよう構成したことを特徴とする、請求項1または2に記載の高炉の炉壁冷却用ステーブ。
- 前記ライナの材質が前記ステーブ本体の材質よりも高温強度が高い材質からなることを特徴とする、請求項1~3のいずれか1項に記載の高炉の炉壁冷却用ステーブ。
- 上下に隣接する前記ライナの隙間は水平方向に位置を異ならせることを特徴とする、請求項1~4のいずれか1項に記載の高炉の炉壁冷却用ステーブ。
- 上下に隣接する前記垂直溝は水平方向に位置を異ならせることを特徴とする、請求項1~4のいずれか1項に記載の高炉の炉壁冷却用ステーブ。
- 上下に隣接する前記ライナの隙間は水平方向に位置を異ならせると共に、上下に隣接する前記垂直溝は水平方向に位置を異ならせることを特徴とする、請求項1~4のいずれか1項に記載の高炉の炉壁冷却用ステーブ。
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