WO2023121127A1 - Dispositif de chauffage pour four de frittage vertical - Google Patents

Dispositif de chauffage pour four de frittage vertical Download PDF

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Publication number
WO2023121127A1
WO2023121127A1 PCT/KR2022/020329 KR2022020329W WO2023121127A1 WO 2023121127 A1 WO2023121127 A1 WO 2023121127A1 KR 2022020329 W KR2022020329 W KR 2022020329W WO 2023121127 A1 WO2023121127 A1 WO 2023121127A1
Authority
WO
WIPO (PCT)
Prior art keywords
heater
connection part
sintering furnace
width direction
upper connection
Prior art date
Application number
PCT/KR2022/020329
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English (en)
Korean (ko)
Inventor
한무호
나상권
Original Assignee
포스코홀딩스 주식회사
재단법인 포항산업과학연구원
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 포스코홀딩스 주식회사, 재단법인 포항산업과학연구원 filed Critical 포스코홀딩스 주식회사
Publication of WO2023121127A1 publication Critical patent/WO2023121127A1/fr

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Classifications

    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/20—Graphite
    • C01B32/205—Preparation
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/142—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving along a vertical axis
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F27B2009/3607—Heaters located above the track of the charge

Definitions

  • the present invention relates to a heater for a sintering furnace, and more particularly, to a heater for a vertical sintering furnace.
  • artificial graphite is manufactured by heating an artificial graphite firing furnace to a very high temperature, for example, 2900° C. to 3000° C., using a heater, and retaining calcined coke, a raw material for graphitization, inside the heater for a certain period of time.
  • a heater made of graphite is used as a heating means for heating the graphitization raw material.
  • the artificial graphite firing furnace is mainly used in a vertical type for continuous graphite production.
  • the heater of this vertical artificial graphite firing furnace is installed vertically in the center of the furnace surrounded by an insulating material.
  • the present invention is to provide a vertical sintering furnace heater capable of minimizing heat generated around the electrodes installed on and below the heater of the vertical graphite sintering furnace and generating the optimum temperature required for firing graphitized raw materials in the center of the heater. .
  • a heater of a vertical sintering furnace is a heater of a vertical sintering furnace installed in a vertical direction on the ground or an installation surface, and includes a heater unit for generating a temperature capable of sintering a graphitized raw material; It may include an upper connection part connected to an upper part of the heater part, at least a part of which protrudes to the outside of the heater, and an upper electrode for conducting electricity.
  • the heater may include a lower connection part connected to a lower part of the heater part, at least a part of which protrudes to the outside of the heater, and in which a lower electrode for conducting electricity is installed.
  • the upper connection part and the lower connection part may be made of the same material as the heater part or made of a different material.
  • the heater may have a square tube shape or a circular tube shape.
  • passages having a square cross-section having the same size may be disposed on inner walls of the heater unit, the upper connection part, and the lower connection part.
  • a first upper expansion part extending in a width direction of the upper connection part from a straight line formed by an outer surface of the heater part may be provided on an outer surface of the upper connection part.
  • a length in the width direction of the outer surface of the first upper expansion unit may be set to be 1.5 to 5 times greater than the length of the outer surface of the heater unit in the width direction.
  • a first lower expansion part may be provided on an outer surface of the lower connection part extending in a width direction of the lower connection part from a straight line formed by an outer surface of the heater part.
  • a length in the width direction of the outer surface of the first lower expansion part may be set to be 1.5 to 5 times greater than the length of the outer surface of the heater part in the width direction.
  • passages having a circular cross-section having the same size may be disposed on inner circumferential surfaces of the heater unit, the upper connection part, and the lower connection part.
  • a second upper expansion part may be provided on an outer surface of the upper connection part extending in a radial direction of the upper connection part from a straight line formed by an outer surface of the heater part.
  • the size of the outer diameter of the second upper expansion unit may be set to be 1.5 to 5 times larger than the size of the outer diameter of the heater unit.
  • a second lower expansion part may be provided on an outer surface of the lower connection part extending in a radial direction of the lower connection part from a straight line formed by an outer surface of the heater part.
  • the outer diameter of the second lower expansion part may be set to be 1.5 to 5 times larger than the outer diameter of the heater part.
  • the heater when the heater is energized, high efficiency can be achieved by appropriately designing and manufacturing the resistance values of the upper connection part and the lower connection part of the heater in the form of a square tube or a circular tube according to the situation of the vertical sintering furnace.
  • FIG. 1 is a schematic configuration diagram showing a mounting state of a heater of a vertical sintering furnace according to an embodiment of the present invention.
  • FIG. 2 is a schematic front view of a first embodiment of a heater for a vertical sintering furnace according to an embodiment of the present invention.
  • FIG 3 is a schematic perspective view of a first embodiment of a heater for a vertical sintering furnace according to an embodiment of the present invention.
  • FIG. 4 is a schematic front view of a second embodiment of a heater for a vertical sintering furnace according to an embodiment of the present invention.
  • FIG. 5 is a schematic perspective view of a second embodiment of a heater for a vertical sintering furnace according to an embodiment of the present invention.
  • FIG. 6 shows a heater equivalent resistance structure and an electric current circuit diagram of a vertical sintering furnace according to the present invention.
  • FIG. 1 is a schematic configuration diagram showing a mounting state of a heater of a vertical firing furnace according to an embodiment of the present invention
  • FIG. 2 is a first heater of a vertical firing furnace (not shown) according to an embodiment of the present invention. It is a schematic configuration diagram of the embodiment.
  • the heater 100 of the vertical firing furnace is installed in a vertical direction (Y direction in FIG. 1 ) on the ground or installation surface.
  • the heater 100 may include a heater unit 110 , an upper connection unit 120 , and a lower connection unit 140 .
  • the heater unit 110 is disposed at the central portion of the heater 100 in a vertical direction, and may generate a temperature capable of plasticizing the graphitization raw material.
  • the upper connection part 120 is connected to the upper part of the heater part 110, at least a part of it protrudes out of the heater 100, and the upper electrode 130 for conducting electricity may be installed on the upper part.
  • the lower connection part 140 is connected to the lower part of the heater part 110, at least a part of it protrudes out of the heater 100, and a lower electrode 150 for conducting electricity may be installed at the lower part.
  • An insulator 200 may be installed outside the heater 100 to insulate the heater 100 .
  • the upper connection part 120 and the lower connection part 140 may be made of the same material as the heater part 110 or made of a different material.
  • connection part 120 and the lower connection part 140 have a specific resistance smaller than that of the material of the heater part 110 so that the amount of heat generated is smaller than that of the heater part 110 when electricity is applied to the heater 100. material can be made.
  • the heater part 110, the upper connection part 120, and the lower connection part 140 may be formed in a square tube shape or a circular tube shape.
  • Inner walls of the heater unit 110, the upper connection unit 120, and the lower connection unit 140 may be provided with passages 101 having a rectangular cross section of the same size so that the graphitization raw material can be charged and heated.
  • a first upper part extending in a set length in the width direction (X direction in FIG. 2) of the upper connection part 120 from a straight line (X1-X1 line) formed by the outer surface of the heater part 110.
  • the expansion part 121 may be integrally provided.
  • the length W12 in the width direction of the outer surface of the first upper extension part 121 is the width of the outer surface of the heater part 110 so that the resistance compared to the heater part 110 decreases by a set ratio when electricity is applied to the heater 100. It may be set in a range of 1.5 to 5 times the length W11 in the width direction (X direction in FIG. 2).
  • the length (W12) in the width direction of the outer surface of the first upper extension portion 121 is the distance between the two opposing sides of the square tube of the first upper extension portion 121, particularly in the case of a rectangular tube shape. It can indicate the distance between the short sides.
  • a set length extends from a straight line (X1-X1 line) formed by the outer surface of the heater part 110 in the width direction (X direction in FIG. 2) of the lower connection part 140.
  • 1 lower extension part 141 may be integrally provided.
  • the length W13 in the width direction of the outer surface of the first lower extension part 141 is the length of the outer surface of the heater part 110 so that the resistance compared to the heater part 110 is reduced by a set ratio when electricity is applied to the heater 100. It may be set in a range of 1.5 to 5 times the length W11 in the width direction (X direction in FIG. 2).
  • the length (W13) in the width direction of the outer surface of the first lower extension portion 141 is the distance between the two opposing sides of the square tube of the first lower extension portion 141, particularly in the case of a rectangular tube shape, It can indicate the distance between the short sides.
  • the first embodiment of the heater 100 will be described as an example, but it can be applied to the second embodiment of the heater 100 as well.
  • the heater 100 is divided into three sections, that is, the upper connection part 120, the heater part 110, and the lower connection part 140, and the entire heater 100 is manufactured by connecting them.
  • the heat generated from the upper electrode 130 and the lower electrode 150 installed at the upper connection part 120 and the lower connection part 140 is minimized, and the heater part, which is the middle part of the heater 100 ( 110) can generate a sufficient temperature required for firing.
  • connection part 120 and the lower connection part 140 protrude outside the heater 100, they can be easily cooled at the part protruding outside the heater 100.
  • a carbon material having a lower specific resistance compared to the heater part 110 located in the middle of the heater 100 is selected, and at the same time, the physical size is selected at the center of the heater 100. It is made larger than the heater unit 110.
  • the lengths W12 and W13 in the width direction of the outer surfaces of the first upper extension part 121 and the first lower extension part 141 are defined as the width direction of the outer surface of the heater unit 110 (X direction in FIG. 2). ) is set in the range of 1.5 to 5 times the length (W11).
  • the equivalent resistance of the first upper extension part 121 and the first lower extension part 141 has a value smaller than that of the heater part 110 by a set ratio, and thus the amount of heat generated Since it is reduced by that much, heat loss due to cooling of the upper electrode 130 and the lower electrode 150 can be greatly reduced.
  • the heater 100 when the heater 100 is composed of three parts, the upper connection part 120, the heater part 110, and the lower connection part 140, during maintenance of the heater 100, only the damaged part is replaced to optimize the heater 100 ) can be managed.
  • the heater 100 can be viewed as a series connection structure of three resistors. 6 shows a heater equivalent resistance structure and an electric current circuit diagram of a vertical firing furnace according to the present invention.
  • the heater 100 equivalent resistance structure is composed of the upper connection part 120 resistance, the heater part 110 resistance, and the lower connection part 140 resistance.
  • Phase control is performed using an SCR power element for controlling power supplied to the heater 100 .
  • the resistance of the graphite heater 100 is usually very low, on the order of several milliohms, power is supplied to the heater 100 after being converted into a low voltage and high current using a large current conversion transformer.
  • the power dissipated in a resistor is the square of the current through the resistor multiplied by the value of the resistor. Therefore, the power consumed by each resistor in the heater equivalent resistance structure can be expressed by the following equations (1-1), (1-2), and (1-3).
  • Heater power consumption (load current) 2 ⁇ heater resistance --- (1-2)
  • the resistance of the upper connection part 120 and the lower connection part 140 should be minimized compared to that of the heater part 110 .
  • the resistance of the graphite heater can be obtained by Equation 2 below.
  • ⁇ (resistance) means the specific resistance of the graphite heater material. Unit is ⁇ m.
  • Resistance is proportional to resistivity and length, and inversely proportional to cross-sectional area. Therefore, when the specific resistance of the heater 100 is small or the cross-sectional area is large, the resistance is reduced.
  • the graphite material of the upper connection part 120 and the lower connection part 140 of the heater 100 is selected as a material with low resistivity and the length in the width direction is extended as shown in FIGS. 2 and 3, the heater 100 Compared to the heater part 110 in the central part, the resistance is reduced.
  • the heater unit 110A, the upper connection unit 120A, and the lower connection unit 140A of the heater 100 have a circular tube shape. A case will be described as an example.
  • A is added to the reference numeral of the square tube shape to distinguish it from the case where the heater part 110, the upper connection part 120, and the lower connection part 140 are in the form of a square tube.
  • a flow path 103 having a circular cross section having the same diameter is disposed so that the graphitization raw material can be charged and heated. It can be.
  • a set length extends outward in the radial direction (X direction in FIG. 4) of the upper connection part 120A from the straight line (X2-X2 line) formed by the outer surface of the heater part 110A.
  • the second upper expansion part 121A may be integrally provided.
  • the size of the outer diameter (D12) of the second upper expansion part (121A) is the size (D11) of the outer diameter of the heater part (110A) so that the resistance to the heater part (110A) is reduced by a set ratio when the heater 100 is energized. It may be set in the range of 1.5 times to 5 times the contrast.
  • a set length extends from a straight line (X2-X2 line) formed by the outer surface of the heater part 110A to the outside in the radial direction (X direction in FIG. 4) of the lower connection part 140A.
  • the second lower extension part 141A may be integrally provided.
  • the size of the outer diameter D13 of the second lower extension part 141A is the size of the outer diameter D11 of the heater part 110A so that the resistance to the heater part 110A decreases by a set ratio when the heater 100 is energized. It may be set in the range of 1.5 times to 5 times the contrast.
  • the outer diameter of the second upper extension 121A (D12) is set to be 1.5 to 5 times larger than the outer diameter of the heater 110A (D11), and the second lower extension 141A ) is set to be 1.5 times to 5 times larger than the size D11 of the outer diameter of the heater unit 110A.
  • the equivalent resistance of the second upper extension portion 121A and the second lower extension portion 141A has a value smaller than that of the heater portion 110A by a set ratio, and thus the amount of heat generated Since it is reduced by that much, heat loss due to cooling of the upper electrode 130 and the lower electrode 150 can be greatly reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Resistance Heating (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne un dispositif de chauffage pour un four de frittage vertical. Le dispositif de chauffage selon la présente invention comprend : une unité de chauffage pour générer une température à laquelle des matières premières de graphitisation peuvent être frittées ; une partie de liaison supérieure qui est reliée à une partie supérieure de l'unité de chauffage et sur laquelle est installée une électrode supérieure pour appliquer un courant électrique ; et une partie de liaison inférieure qui est reliée à une partie inférieure de l'unité de chauffage et sur laquelle est installée une électrode inférieure pour appliquer un courant électrique.
PCT/KR2022/020329 2021-12-21 2022-12-14 Dispositif de chauffage pour four de frittage vertical WO2023121127A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020210184136A KR20230094749A (ko) 2021-12-21 2021-12-21 수직형 소성로의 히터
KR10-2021-0184136 2021-12-21

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WO2023121127A1 true WO2023121127A1 (fr) 2023-06-29

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005147419A (ja) * 2003-11-11 2005-06-09 Ishikawajima Harima Heavy Ind Co Ltd 連続式通電加熱焼成炉
JP2008308360A (ja) * 2007-06-14 2008-12-25 Mitsubishi Gas Chem Co Inc 電気二重層キャパシタ電極用炭素材料の製造方法
JP2015214463A (ja) * 2014-05-12 2015-12-03 株式会社Ihi 黒鉛化炉
CN109654888A (zh) * 2019-01-15 2019-04-19 太原理工大学 一种高频脉冲放电烧结系统
CN110054183A (zh) * 2019-02-21 2019-07-26 辽宁万鑫科技材料有限公司 高效节能环保连续生产锂电池负极材料的石墨化炉

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005147419A (ja) * 2003-11-11 2005-06-09 Ishikawajima Harima Heavy Ind Co Ltd 連続式通電加熱焼成炉
JP2008308360A (ja) * 2007-06-14 2008-12-25 Mitsubishi Gas Chem Co Inc 電気二重層キャパシタ電極用炭素材料の製造方法
JP2015214463A (ja) * 2014-05-12 2015-12-03 株式会社Ihi 黒鉛化炉
CN109654888A (zh) * 2019-01-15 2019-04-19 太原理工大学 一种高频脉冲放电烧结系统
CN110054183A (zh) * 2019-02-21 2019-07-26 辽宁万鑫科技材料有限公司 高效节能环保连续生产锂电池负极材料的石墨化炉

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