WO2018037957A1 - Douve de protection de corps de four - Google Patents

Douve de protection de corps de four Download PDF

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Publication number
WO2018037957A1
WO2018037957A1 PCT/JP2017/029275 JP2017029275W WO2018037957A1 WO 2018037957 A1 WO2018037957 A1 WO 2018037957A1 JP 2017029275 W JP2017029275 W JP 2017029275W WO 2018037957 A1 WO2018037957 A1 WO 2018037957A1
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WO
WIPO (PCT)
Prior art keywords
stave
pipe
furnace
copper
furnace body
Prior art date
Application number
PCT/JP2017/029275
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English (en)
Japanese (ja)
Inventor
久夫 楠本
清志 緒方
傑 井田
勝紀 菊地
Original Assignee
Ｊｆｅスチール株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to KR1020197003451A priority Critical patent/KR102185950B1/ko
Priority to CN201780048789.XA priority patent/CN109563556A/zh
Priority to JP2018535611A priority patent/JP6691328B2/ja
Publication of WO2018037957A1 publication Critical patent/WO2018037957A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • 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
    • 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

Definitions

  • the present invention relates to a furnace body protecting stave used for protecting a furnace wall such as a blast furnace exposed to a high temperature.
  • a furnace body cooling device (hereinafter referred to as a stave) is used to protect the blast furnace furnace body from the heat load in the furnace.
  • the stave for protecting the furnace body is made of cast iron, rolled copper, cast copper, and the like, and has a cooling water channel in the stave body.
  • a stave with higher cooling capacity is required to cope with the high heat load of the blast furnace furnace body, and as a result, the use of a copper stave with a high thermal conductivity is increasing.
  • the cooling water channel formed in the stave body varies depending on the design concept and which material is used. That is, depending on the material, it is common to cast a steel pipe with cast iron in cast iron, to form a water channel (drilled hole) by machining in rolled copper, and to form a water channel by casting in cast copper.
  • FIGS. 7A and 7B are a front view and a cross-sectional view taken along line AA, respectively, showing the configuration of an example of a conventional furnace body protection stave made of rolled copper.
  • the stave body 51 made of rolled copper is provided with a plurality of water channels 52 (here, three). Each water channel 52 is formed in the stave body 51 by machining (drilling).
  • the water channel 52 is a water supply / drainage passage 52b-1, 52b-2 orthogonal to the water channel main body 52a penetrating in the longitudinal direction of the stave body 51 and the water supply main body 52a for communicating with the water supply / drainage piping 53-1, 53-2. It consists of and.
  • Both ends of the water channel body 52a are sealed by welding the sealing members 54-1 and 54-2.
  • the water supply / drainage passages 52b-1 and 52b-2 are fixed by welding water supply / drainage pipes 53-1 and 53-2 made of steel pipes or copper pipes, respectively.
  • the stave body 51 is provided with a plurality of (here, four) bolts 55.
  • the furnace body protecting stave having the above-described configuration is fixed to the iron shell 61 of the blast furnace body by screwing using bolts 55 and nuts 56.
  • the water supply / drainage pipes 53-1 and 53-2 of the stave body 51 pass through holes formed in the iron shell 61 of the blast furnace furnace body, and are supplied and drained from the outside of the furnace body.
  • the water leakage of the copper stave is discovered when the gas in the blast furnace is mixed in the cooling water, but the location where the water leakage occurs is estimated as follows from the survey results.
  • the cooling copper channel is formed in the stave body itself in the rolled copper stave, the cooling capacity is higher than the water cooling through the cast pipe used in the cast iron stave.
  • the cooling water channel is often damaged due to damage to the stave body, resulting in early disappearance of the stave body. Therefore, the rolled copper stave has a short life as a result.
  • the cooling passage is constituted by cast-in piping, and is independent of the stave body. Therefore, although the influence on the cooling passage due to damage of the stave body is small, the cooling capacity is not high in the cast pipe because the heat transfer rate is lowered by the boundary layer formed between the pipe and the stave body.
  • Patent Document 1 a groove is dug in the outside of the furnace of the copper stave by machining, etc., a steel pipe is incorporated in the groove, and the steel plate is fixed with bolts Such a structure is known (Patent Document 1).
  • the copper stave having the structure disclosed in Patent Document 1 has the following drawbacks. That is, since the connection between the copper stave and the steel plate for fixing the pipe in the groove is based on the bolt, it cannot be connected to the end of the steel pipe. Therefore, due to the difference in thermal expansion coefficient between the copper stave and the steel plate (copper: about 1.6 ⁇ 10 ⁇ 5 / ° C., iron: about 1.0 ⁇ 10 ⁇ 5 / ° C.), the steel plate is deformed by the heat load, The mouth of the steel plate opens. And a raw material penetrate
  • the steel plate comes off from the copper stave, and the function of the stave is lost simultaneously with the holding function of the pipe.
  • the cost can be reduced by using a steel plate outside the furnace, but at the same time, the cooling capacity of the blast furnace core and refractory is also reduced.
  • An object of the present invention is a stave for protecting a furnace body that can reduce the probability of leakage of cooling water as a stave installed on the wall of a furnace body such as a blast furnace, and can achieve a long life by preventing damage to the stave. Is to provide.
  • the present invention incorporates a steel pipe into a groove provided on the furnace outer surface or furnace inner surface of a copper stave body, and joins the stave body groove and the pipe with a hard brazing material to the stave body.
  • a furnace body protecting stave having a structure in which a water channel for cooling a stave body is formed.
  • a lid is formed on the groove so as to cover the brazing filler metal by welding
  • a pipe inlet and a pipe outlet that protrude from the outer surface of the stave body when the pipe is incorporated into the groove at one end and the other end of the pipe are formed integrally with the pipe.
  • a protective pipe is provided on the outer periphery of each of the pipe inlet and the pipe outlet; (4) providing a first intermediate member between the surface of the groove and the brazing filler metal; (5) A second intermediate member is provided between the hard brazing material and the outer surface of the pipe. Is considered to be a more preferable solution.
  • a water channel for cooling a copper stave body such as rolled copper is constituted by a steel pipe, and the copper stave body and the pipe are joined and embedded with a brazing filler metal, thereby increasing a high heat load.
  • a brazing filler metal can withstand long-lived staves. Even if the stave body is deformed, the welded portion is not in direct contact with the water channel, so there is no fear of water leakage from the welded portion used in each part of the conventional water channel.
  • the cooling capacity for the stave body can be increased by filling the gap between the stave body and the cooling pipe with a hard brazing material.
  • FIGS. 1 (a) and 1 (b) are a front view, a rear view, a cross-sectional view along the line AA, and a cross-sectional view along the line BB showing the configuration of an example of the stave for protecting a furnace body of the present invention, respectively.
  • (A) to (d) are a front view, a rear view, a cross-sectional view along the line AA, and a line BB along the structure of another example of the furnace body protecting stave of the present invention, respectively.
  • (A) to (c) are respectively taken along line AA in FIGS. 1 (a) and 1 (b) for explaining each step in the manufacturing method of the example of the furnace body protecting stave of the present invention.
  • FIG. (A), (b) is a sectional view taken along line BB of FIGS. 1 (a), 1 (b), and FIG. It is a figure shown as sectional drawing along the BB line of a) and (b).
  • (A), (b) is the figure which shows the structure of the further another example of the furnace body protection stave of this invention as sectional drawing along the BB line of FIG. 1 (a), (b), respectively. is there.
  • (A), (b) is the front view which shows the structure of an example of the conventional furnace body stave which consists of rolled copper, and sectional drawing along the AA line, respectively. It is a figure for demonstrating an example which mounts the stave for furnace body protection of this invention to the furnace body of a blast furnace.
  • FIGS. 1 (a) to 1 (d) are a front view, a rear view, a cross-sectional view taken along line AA, and a line BB, respectively, showing the configuration of an example of a furnace body protecting stave according to the present invention. It is sectional drawing.
  • the furnace body protecting stave of the present invention shown in FIGS. 1 (a) to 1 (d)
  • it is formed on the furnace outer surface 1a of the copper stave body 1 as shown in FIGS. 1 (a) and 1 (b).
  • a steel pipe 3 is incorporated into the groove 2 (here, three), and the groove 2 of the stave body 1 and the pipe 3 are joined with a hard brazing material 4.
  • the stave body 1 has a structure in which a water path for cooling the stave body including the pipe 3 is formed.
  • FIGS. 2 (a) to 2 (d) the inside of the furnace of the copper stave body 1 is used.
  • Grooves 2 three in this case
  • outlet holes 7-1 and 7-2 for piping are provided on the outer surface 1a of the furnace, as shown in FIGS. 2 (c) and 2 (d).
  • It may have a structure in which a pipe 3 made of steel is incorporated, the groove 2 of the stave body 1 and the pipe 3 are joined with a brazing filler metal 4 and a water passage for cooling the stave body made of the pipe 3 is formed in the stave body 1. Is possible.
  • FIGS. 3 (a) to 3 (c) are respectively taken along line AA in FIGS. 1 (a) and 1 (b) for explaining each step in the manufacturing method of an example of the furnace body protecting stave according to the present invention.
  • FIG. The manufacturing method of an example of the furnace body protecting stave of the present invention will be described with reference to FIGS. 3 (a) to 3 (c).
  • Stave body 1 and steel pipe 3 are prepared.
  • the grooves 2 can be formed by machining the outer surface 1a of the copper stave body 1 using an end mill or the like.
  • the cross-sectional shape of the groove 2 can be U-shaped, but any shape can be used as long as the pipe 3 can be incorporated.
  • the pipe 3 made of steel has a pipe inlet 3-1 and a pipe outlet 3- that protrude from the furnace outer surface 1a of the stave body 1 when the pipe 3 is installed in the groove 2 at one end and the other end of the pipe 3. 2 is formed integrally with the pipe 3.
  • the pipe inlet part 3-1 and the pipe outlet part 3-2 can be formed by bending both ends of the pipe 3 having a single configuration using a bender or the like. Note that a protective pipe (not shown) may be provided around the pipe inlet part 3-1 and the pipe outlet part 3-2.
  • the pipe 3 is assembled in the groove 2 so that the pipe inlet part 3-1 and the pipe outlet part 3-2 protrude from the furnace outer surface 1a.
  • a brazing filler metal 4 heated to a predetermined temperature and poured into a molten state is poured between the groove 2 of the stave body 1 and the pipe 3, and then cooled and hardened.
  • the brazing material 4 is cured.
  • the groove 2 of the stave body 1 and the pipe 3 are joined by the brazing filler metal 4 to form a water channel composed of the stave body cooling pipe 3 in the stave body 1. A structure can be obtained.
  • FIGS. 4 (a) to 4 (c) are respectively FIGS. 2 (a), 2 (a), 2 (a), 2 (a), 2 (b) and 2 (c) for explaining each step in the manufacturing method of another example of the furnace body protecting stave of the present invention. It is a figure along the AA line of (b). The manufacturing method of another example of the furnace body protecting stave according to the present invention will be described with reference to FIGS. 4 (a) to 4 (c). First, as shown in FIG. 4 (a), a groove 2 is formed on the furnace inner surface 1b.
  • the steel stave body 1 and steel made of copper having outlet holes 7-1 and 7-2 for projecting the pipe inlet portion 3-1 and the pipe outlet portion 3-2 from the furnace outer surface 1a are formed on the furnace outer surface 1a.
  • a pipe 3 made of metal is prepared.
  • the groove 2 can be formed by machining the inner surface 1b of the copper stave body 1 using an end mill or the like.
  • the outlet holes 7-1 and 7-2 can be formed by machining from the bottom of the groove 2 or the furnace outer surface 1a using a drill or the like.
  • the pipe 3 is provided in the groove 2, and the pipe inlet portion 3-1 and the pipe outlet portion 3-2 are connected to the outer surface of the furnace through the outlet holes 7-1 and 7-2. Install so as to protrude from 1a.
  • the brazing filler metal 4 heated to a predetermined temperature and poured into a molten state is poured between the groove 2 of the stave body 1 and the pipe 3, and then cooled. The brazing filler metal 4 is cured.
  • the groove 2 of the stave body 1 and the pipe 3 are joined by the brazing filler metal 4 to form a water channel composed of the stave body cooling pipe 3 in the stave body 1. A structure can be obtained.
  • the U-shaped groove 2 is dug into the furnace outer surface 1a or the furnace inner surface 1b of the copper stave body 1 made of rolled copper or the like by machining or the like.
  • the steel pipe 3 is assembled in the letter-shaped groove 2. Copper having higher thermal conductivity than cast iron is used as the stave body 1, and the cooling water channel is made independent by the steel pipe 3, so that damage to the stave body 1 due to breakage of the cooling water channel or the like as described above or stave body 1 Can be prevented from disappearing early.
  • the U-shaped groove 2 processed in the furnace outer surface 1a or the furnace inner surface 1b of the copper stave body 1 serves as a cooling water channel of the stave body 1.
  • the steel pipe 3 is formed in advance into a predetermined shape (a shape corresponding to the layout of the U-shaped groove 2), and is incorporated into the U-shaped groove 2 of the copper stave body 1.
  • the stave body 1 and the pipe 3 are joined by the brazing filler metal 4 with the pipe 3 incorporated.
  • the present inventors measured the temperature of the actual machine (during blast furnace operation) for a long time with water flowing through the cooling channel (10-second pitch data for 2 years).
  • the stave body was found to rise only up to about 400 ° C. Therefore, if the stave body 1 and the pipe 3 are joined with a hard brazing material (BAg defined in JIS Z 3261) whose melting temperature is defined as 450 ° C. or higher, the copper stave body 1 and the pipe 3 are connected. As a result, the present invention was completed. If the temperature of the stave body 1 is 400 ° C. or higher, the cooling water can only be stopped.
  • a hard brazing material BAg defined in JIS Z 3261
  • the stave body 1 itself disappears due to the heat load in the furnace and the abrasion caused by the raw materials. If the melting temperature of the brazing filler metal is too high, the stave body may be deformed at the time of joining. Therefore, the melting temperature of the brazing filler metal is preferably 450 ° C. or higher and 1083 ° C. or lower.
  • Patent Document 1 which discloses a method for holding the pipe by fastening the bolt of the steel plate, occurs. Therefore, the life of the stave body 1 can be further extended. Further, there is a gap between the U-shaped groove 2 and the pipe 3, in order to tightly join the stave body 1 and the pipe 3 by pouring an alloy for “hard brazing” into the gap. The heat transfer coefficient between the stave body 1 and the pipe 3 can be increased, and the cooling capacity of the stave body 1 by the water channel constituted by the pipe 3 is increased.
  • the pipe 3 when the pipe 3 is welded, a heat-affected zone is locally created, and the pipe 3 is cracked by a heat load during use, causing water leakage.
  • the base material can be joined without melting, so that no cracks are generated by the local heat-affected zone.
  • the brazing filler metal absorbs the difference in thermal expansion between the copper of the stave body and the steel of the pipe, and has an effect of reducing stress concentration.
  • the cooling pipe is made of steel with higher hardness than copper and made independent of the copper stave body such as rolled copper, so that the cooling stave body is perforated due to thermal deformation and wear of the copper stave body, and water leakage occurs. Probability can be lowered.
  • the cooling capacity of the copper stave of the present invention is higher than that of the conventional cast iron stave, and the cooling water channel is less damaged than the conventional copper stave. Therefore, it is possible to configure a furnace body protecting stave that achieves a long life.
  • FIG. 5 (a) and 5 (b) are cross-sectional views taken along the line BB of FIG. 1 (a) and FIG. 2 (a), respectively, showing the structure of still another preferred embodiment of the furnace body protecting stave of the present invention. It is a figure shown as sectional drawing along the BB line of (b).
  • FIG. 5A in which the groove 2 is provided on the furnace outer surface 1 a of the stave body 1, after the copper stave body 1 and the pipe 3 are joined by the brazing filler metal 4, further detachment prevention is performed. Therefore, the lid 5 is welded to the U-shaped groove 2, and the end portion of the lid 5 and the end portion of the groove 2 of the stave body 1 are joined and attached by the weld portion 6.
  • cover 5 can be similarly joined by the welding part 6.
  • the material of the lid 5 is preferably made of the same copper as that of the stave body, but lids of other materials can also be used.
  • FIGS. 6A and 6B are views showing the structure of still another preferred example of the furnace body protecting stave according to the present invention as a cross-sectional view along the line BB in FIG. 1A. .
  • a first intermediate member 6-1 is provided between the surface of the groove 2 and the brazing filler metal 4.
  • a second intermediate member 6-2 is provided between the brazing filler metal 4 and the outer surface of the pipe 3.
  • a material having an appropriate thermal conductivity may be used according to the design level of the cooling capacity of the stave.
  • the cooling capacity of the stave can be adjusted to meet the purpose.
  • at least a member having a thermal conductivity different from any of the stave body 1, the pipe 3, and the brazing filler metal 4 is used as an intermediate member.
  • FIGS. 6A and 6B the example in which the groove 2 is formed on the furnace outer surface 1 a has been described.
  • the first intermediate member is also formed in the example in which the groove 2 is formed on the furnace inner surface 1 b. Needless to say, the effects of the 6-1 or the second intermediate member 6-2 can be obtained.
  • the stave for protecting a furnace body comprises a water channel for cooling a copper stave body made of steel pipe, and withstands high heat load by bonding and embedding the copper stave body and pipe with a brazing filler metal, and has a long life Therefore, it is an effective method for protecting the inside of the furnace wall that is exposed to high temperatures, not only in the blast furnace but also in other heating furnaces.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Blast Furnaces (AREA)
  • Furnace Details (AREA)

Abstract

Le but de la présente invention est de fournir, en tant que douve de protection de corps de four à installer dans la paroi interne du corps de four d'un haut-fourneau, etc., une douve de protection de corps de four grâce à laquelle la probabilité de fuite d'eau de refroidissement peut être réduite, et une prolongation de la durée de vie peut être obtenue par prévention d'une détérioration de la douve. Une telle douve de protection de corps de four possède une structure dans laquelle une tuyauterie en acier (3) est incorporée dans des rainures (2) disposées sur la surface four externe (1a) ou la surface four interne (1b) d'un corps de douve en cuivre (1) et les rainures (2) du corps de douve (1) sont liées à la tuyauterie (3) par un matériau de brasage dur (4), formant ainsi des canaux d'eau permettant de refroidir le corps de douve dans le corps de douve (1).
PCT/JP2017/029275 2016-08-23 2017-08-14 Douve de protection de corps de four WO2018037957A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020197003451A KR102185950B1 (ko) 2016-08-23 2017-08-14 노체 보호용 스테이브
CN201780048789.XA CN109563556A (zh) 2016-08-23 2017-08-14 炉体保护用壁板
JP2018535611A JP6691328B2 (ja) 2016-08-23 2017-08-14 炉体保護用ステーブ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016162649 2016-08-23
JP2016-162649 2016-08-23

Publications (1)

Publication Number Publication Date
WO2018037957A1 true WO2018037957A1 (fr) 2018-03-01

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Application Number Title Priority Date Filing Date
PCT/JP2017/029275 WO2018037957A1 (fr) 2016-08-23 2017-08-14 Douve de protection de corps de four

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JP (1) JP6691328B2 (fr)
KR (1) KR102185950B1 (fr)
CN (1) CN109563556A (fr)
TW (1) TWI642788B (fr)
WO (1) WO2018037957A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110732606A (zh) * 2019-10-24 2020-01-31 上海宝钢铸造有限公司 冷却壁的改进型冷却管型制造方法
CN112779375A (zh) * 2020-12-25 2021-05-11 河北万丰冶金备件有限公司 高炉冷却壁

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110094985A (zh) * 2019-05-22 2019-08-06 汕头华兴冶金设备股份有限公司 一种新型铜冷却板及其制造方法
CN113465388B (zh) * 2021-07-05 2023-05-16 安徽兴永机电设备有限公司 一种使用安全的炉体钢结构

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JPS5074519A (fr) * 1973-11-05 1975-06-19
WO2007118752A1 (fr) * 2006-04-18 2007-10-25 Paul Wurth S.A. Procédé de fabrication d'une plaque de refroidissement pour haut-fourneau et plaque de refroidissement ainsi obtenue
JP2007308747A (ja) * 2006-05-17 2007-11-29 Nippon Steel Corp 高炉用ステーブクーラ

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JP3034179B2 (ja) * 1995-02-21 2000-04-17 川崎製鉄株式会社 高炉用ステーブクーラ
JP2002146418A (ja) 2000-11-08 2002-05-22 Nippon Steel Corp ステーブクーラー
CN1535320A (zh) * 2001-07-24 2004-10-06 新日本制铁株式会社 竖炉用板式冷却器
KR100635407B1 (ko) * 2005-07-11 2006-10-19 한국과학기술연구원 수랭식 화격자
CN104707974A (zh) * 2013-12-11 2015-06-17 江苏联兴成套设备制造有限公司 一种铜基体内置钢管的双金属强化冷却壁生产方法
LU92471B1 (en) * 2014-06-06 2015-12-07 Wurth Paul Sa Charging installation of a metallurgical reactor

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Publication number Priority date Publication date Assignee Title
JPS5074519A (fr) * 1973-11-05 1975-06-19
WO2007118752A1 (fr) * 2006-04-18 2007-10-25 Paul Wurth S.A. Procédé de fabrication d'une plaque de refroidissement pour haut-fourneau et plaque de refroidissement ainsi obtenue
JP2007308747A (ja) * 2006-05-17 2007-11-29 Nippon Steel Corp 高炉用ステーブクーラ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110732606A (zh) * 2019-10-24 2020-01-31 上海宝钢铸造有限公司 冷却壁的改进型冷却管型制造方法
CN110732606B (zh) * 2019-10-24 2020-12-08 上海宝钢铸造有限公司 冷却壁的改进型冷却管型制造方法
CN112779375A (zh) * 2020-12-25 2021-05-11 河北万丰冶金备件有限公司 高炉冷却壁

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KR102185950B1 (ko) 2020-12-02
TW201807198A (zh) 2018-03-01
KR20190025985A (ko) 2019-03-12
JP6691328B2 (ja) 2020-04-28
TWI642788B (zh) 2018-12-01
CN109563556A (zh) 2019-04-02
JPWO2018037957A1 (ja) 2019-06-20

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