EP3575418A1 - Heating device and heating method of torpedo car - Google Patents

Heating device and heating method of torpedo car Download PDF

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Publication number
EP3575418A1
EP3575418A1 EP18781429.8A EP18781429A EP3575418A1 EP 3575418 A1 EP3575418 A1 EP 3575418A1 EP 18781429 A EP18781429 A EP 18781429A EP 3575418 A1 EP3575418 A1 EP 3575418A1
Authority
EP
European Patent Office
Prior art keywords
torpedo car
mouth
lid
heating device
burner
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP18781429.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Kohsuke MORIOKA
Hiroki Tsukigase
Yasuhiko Ootani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP3575418A1 publication Critical patent/EP3575418A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means
    • B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/06—Constructional features of mixers for pig-iron
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces

Definitions

  • molten iron produced in a shaft furnace is conveyed to a steelmaking factory by a torpedo car, and preliminary treatment of the molten iron such as desiliconization treatment is performed in the torpedo car during conveyance.
  • An inner wall of the torpedo car is formed by a refractory so as to accommodate the high-temperature molten iron.
  • the heating device disclosed in Patent Document 1 uses a regenerative burner, and its facility cost is high.
  • the heating device has a structure in which a lid member to enable air-tight sealing is used for a pig iron injecting and discharging port, and exhaust gas is forcibly discharged with a blower.
  • a low-cost normal burner requires an opening part to naturally discharge exhaust gas, and the above-stated regenerative burner having the air-tight structure cannot be applied thereto.
  • the lid may be constituted to include an upper lid and a lower lid, where the lower lid partially covers a lower side of the mouth, and the upper lid is formed to be able to turn around a boundary with the lower lid.
  • the present invention according to another aspect is a heating method of a torpedo car which heats an inside of the torpedo car, comprising: turning a torpedo car main body in such a manner that a mouth is located at a lateral side of the torpedo car main body; covering a lower side of the mouth with a lid so that an opening of the mouth has an open area ratio set in advance in a side view; and heating the inside of the torpedo car by inserting a burner from the mouth.
  • a lower side of the mouth in a side view is partially covered with a lid, in other words, an upper side of the mouth is opened, a heat load due to contact between high-temperature exhaust gas which is discharged from the upper part of the mouth and the lid is reduced, and thermal deformation or the like of the lid can be suppressed.
  • An optimal value may be set as the open area ratio in accordance with a volume capacity of the torpedo car 10, the opening area of the mouth 13, specifications of the burner 2, heating conditions, and the like, but it is preferable to set the optimal value in accordance with particularly a gas flow rate which is discharged from the torpedo car 10 when the inside of the torpedo car 10 is heated.
  • the open area ratio is set to be 10% to 80% of an opening area where a cross-sectional area of the burner 2 is excluded from the opening area of the mouth 13. In this embodiment, entering of the outside air is prevented and the opening area to discharge the exhaust gas is simultaneously secured by decreasing the opening area of the mouth 13 with the lid 4.
  • the lid 4 is attached to cover a lower side of the mouth 13 which faces approximately the vertical direction.
  • exhaust gas is discharged while being in contact with a rear surface of the lid 4 resulting in frequent contacts between the high-temperature exhaust gas and the lid 4 to cause thermal deformation or the like of the lid 4 due to large effect of the heat load.
  • the lower side is less affected by the exhaust gas.
  • a shape of the lid 4 is a half-moon shape where a part of a center part of the mouth 13 where the burner 2 is inserted is cut-off from approximately a semicircle as illustrated in FIG. 3 .
  • the lid 4 is pushed on the mouth 13 side by the spring 6, and the refractory 8 having elasticity which is attached to the rear surface of the lid 4 is brought into contact with the peripheral part 14 of the mouth 13, and thereby, the lid 4 is attached without any gap while corresponding to the projections and recessions of the peripheral part 14.
  • the lid 4 is divided into an upper lid 4a and a lower lid 4b, and an opening degree may be adjusted by turning the lower lid 4b with respect to the upper lid 4a.
  • the cart 5 is not illustrated.
  • the spring 6 is provided at the lower lid 4b as same as the above, and the lower lid 4b is pushed toward the torpedo car 10 side by this spring 6 to partially cover the lower part of the mouth 13.
  • the upper lid 4a and the lower lid 4b are connected with joint parts 41 such as, for example, hinges at a boundary thereof.
  • a moving mechanism 42 which moves the upper lid 4a in the front-rear direction is provided at the upper lid 4a.
  • Patent Document 2 does not disclose or suggest to adjust the open area ratio of the mouth 13 like this embodiment. Meanwhile, flexibility of the heating device 1 can be remarkably improved by making the open area ratio of the mouth 13 adjustable like this embodiment.
  • thermocouples No. 1, No. 2, and No. 3 were provided at three positions in the torpedo car 10 to measure the temperature at the heating time.
  • the thermocouple No. 1 was located at an end part in the longitudinal direction of the torpedo car 10, the thermocouple No. 2 and the thermocouple No. 3 were each located near the mouth 13 in the longitudinal direction to have different depth distances from the mouth 13.
  • the temperature and an oxygen concentration at each position were measured regarding a drying time after 15 hours had passed and a preheating time after 30 hours had passed since a heating start time.
  • the present invention can be applied as a heating device when an inside of a torpedo car is heated with a burner and is useful when heating is performed by using a burner other than a regenerative burner.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
EP18781429.8A 2017-04-04 2018-03-27 Heating device and heating method of torpedo car Withdrawn EP3575418A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017074219 2017-04-04
PCT/JP2018/012479 WO2018186236A1 (ja) 2017-04-04 2018-03-27 混銑車の加熱装置および加熱方法

Publications (1)

Publication Number Publication Date
EP3575418A1 true EP3575418A1 (en) 2019-12-04

Family

ID=63712167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18781429.8A Withdrawn EP3575418A1 (en) 2017-04-04 2018-03-27 Heating device and heating method of torpedo car

Country Status (8)

Country Link
US (1) US20200017928A1 (ja)
EP (1) EP3575418A1 (ja)
JP (1) JP6801780B2 (ja)
KR (1) KR20190132443A (ja)
CN (1) CN110462067A (ja)
CA (1) CA3061380A1 (ja)
TW (1) TWI665306B (ja)
WO (1) WO2018186236A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11603094B2 (en) 2020-02-20 2023-03-14 Toyota Motor North America, Inc. Poor driving countermeasures
US11527154B2 (en) 2020-02-20 2022-12-13 Toyota Motor North America, Inc. Wrong way driving prevention
JP7485939B2 (ja) 2020-08-24 2024-05-17 日本製鉄株式会社 銑鉄溶解装置、及び、銑鉄の溶解方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5386411U (ja) * 1976-12-20 1978-07-15
JPS5919560Y2 (ja) * 1977-07-16 1984-06-06 住友金属工業株式会社 注銑鍋用ふた
JPS5875742U (ja) * 1981-11-17 1983-05-21 住友金属工業株式会社 混銑車予熱装置
JPS62110246U (ja) * 1985-12-28 1987-07-14
JPH0827510A (ja) 1994-07-12 1996-01-30 Kuchiku Kogyo Kk 混銑車耐火物の乾燥方法
JP2005315519A (ja) * 2004-04-28 2005-11-10 Kobe Steel Ltd 混銑車耐火物の乾燥方法と乾燥装置
CN201237219Y (zh) * 2008-06-24 2009-05-13 宝山钢铁股份有限公司 鱼雷罐车预热燃烧装置
JP5386411B2 (ja) * 2010-03-11 2014-01-15 株式会社フジクラ 収納ケース、光モジュール及び光アダプタ
JP4658231B1 (ja) * 2010-10-07 2011-03-23 中外炉工業株式会社 トーピードカー用加熱装置
CN202119262U (zh) * 2011-05-06 2012-01-18 河北钢铁股份有限公司唐山分公司 一种可以自动调节的焙烧炉喷枪盖
CN104315214A (zh) * 2014-08-25 2015-01-28 北京都龙睿建科技发展有限公司 一种通风道或烟道引流防火止回装置
CN204775985U (zh) * 2015-06-19 2015-11-18 中国航空工业集团公司西安飞机设计研究所 一种飞机口盖铰链结构
CN205171287U (zh) * 2015-11-25 2016-04-20 中铁十七局集团第三工程有限公司 旋转式自密实混凝土封边模板排气口闸阀

Also Published As

Publication number Publication date
TW201842194A (zh) 2018-12-01
CA3061380A1 (en) 2018-10-11
TWI665306B (zh) 2019-07-11
JP6801780B2 (ja) 2020-12-16
US20200017928A1 (en) 2020-01-16
CN110462067A (zh) 2019-11-15
JPWO2018186236A1 (ja) 2019-11-14
WO2018186236A1 (ja) 2018-10-11
KR20190132443A (ko) 2019-11-27

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