EP3358024A1 - Wangenplatte mit reduzierter eisenagglomerationsvorrichtung - Google Patents

Wangenplatte mit reduzierter eisenagglomerationsvorrichtung Download PDF

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Publication number
EP3358024A1
EP3358024A1 EP16851970.0A EP16851970A EP3358024A1 EP 3358024 A1 EP3358024 A1 EP 3358024A1 EP 16851970 A EP16851970 A EP 16851970A EP 3358024 A1 EP3358024 A1 EP 3358024A1
Authority
EP
European Patent Office
Prior art keywords
close contact
cheek plate
gas
roller
rollers
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.)
Granted
Application number
EP16851970.0A
Other languages
English (en)
French (fr)
Other versions
EP3358024A4 (de
EP3358024B1 (de
Inventor
Hyun Soo Kim
Gwi Hee Han
Jae Hoon Jung
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.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
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 Posco Co Ltd filed Critical Posco Co Ltd
Publication of EP3358024A1 publication Critical patent/EP3358024A1/de
Publication of EP3358024A4 publication Critical patent/EP3358024A4/de
Application granted granted Critical
Publication of EP3358024B1 publication Critical patent/EP3358024B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor

Definitions

  • the present invention relates to cheek plates which are installed at both sides of rollers of an agglomeration apparatus and prevent a leakage of reduced iron.
  • reduced fine iron ore Since reduced fine iron ore has high reactivity when the reduced fine iron ore is exposed to the air, there is a risk that the reduced fine iron ore is likely to be oxidized or ignited.
  • the activity is caused by a specific surface area of the fine iron ore.
  • the fine iron ore in the form of hematite is reduced to magnetite, such that a crystal structure thereof is greatly changed.
  • the hematite and the magnetite are quite different from each other in terms of a lattice structure, and as a result, the change in crystal structure causes volume expansion and a lot of internal cracks.
  • the occurrence of cracks increases a specific surface area of the ore and increases an area of the ore which may react with gas, thereby finally assisting in increasing a reduction rate.
  • the reduced fine iron ore in the form of hematite and the reduced fine iron ore in the form of limonite have high reactivity because of a large specific surface area thereof, and as a result, the reduced fine iron ore in the form of hematite and the reduced fine iron ore in the form of limonite are highly likely to be ignited or reoxidized while reacting with oxygen even at room temperature.
  • agglomeration technology there are a method of sintering fine iron ore by an oxidation reaction, and a method of plastically deforming reduced fine iron ore by physical pressure to make the fine iron ore in the form of a lump.
  • the method of sintering the fine iron ore by the oxidation reaction is not economically advantageous because the method reoxidizes the reduced fine ore, and as a result, a method of compacting the fine iron ore by physical pressure is mainly used.
  • the FINMET process, the FINEX process, and the like are performed by the process of agglomerating the reduced fine iron ore.
  • the most efficient method of compacting the reduced fine iron ore is to supply and compress the reduced fine iron ore between two rotating rollers, and production may be adjusted by adjusting rotational speeds (rpm) of the rollers.
  • This apparatus is called a roller compactor. While the reduced iron is compressed between the rotating rollers, the reduced iron leaks to both sides of the rollers because an axial length of the roller is limited. Plate-shaped objects are in close contact with both sides of the rollers in order to prevent the leakage of the reduced iron, and the plate-shaped object is called a cheek plate.
  • the reduced iron is compressed and molded between the rotating rollers and between the cheek plates which are in close contact with the rotating rollers, and in this case, gas, which fills pores between particles in the reduced iron, is also compressed in a molded product.
  • pressure which has been applied to the molded product, disappears, and the gas compressed in the molded product is expanded, which may cause the molded product to be destroyed.
  • This situation is called a spring-back, and it is necessary to allow the gas to be discharged well from the cheek plates in order to prevent the spring-back, but it is difficult to discharge the gas because of the close contact between the rollers and the cheek plates.
  • the present invention has been made in an effort to provide a cheek plate for an apparatus for agglomerating reduced iron, which is capable of effectively discharging gas, which is produced when processing the reduced iron, while increasing close contact force between the cheek plates and both sides of rollers.
  • An exemplary embodiment of the present invention provides a cheek plate for an apparatus for agglomerating reduced iron, the cheek plate including: a cover portion which has a fan shape and is installed at each of both sides of a pair of rollers for processing the reduced iron to prevent the reduced iron from leaking to a lateral space formed between the rollers; roller close contact portions which protrude from inner rim portions of the cover portion and are in close contact with outer portions of the rollers to maintain airtightness of the space between the rollers; and gas discharge portions which extend along plate surfaces of the roller close contact portions, and discharge gas produced when processing the reduced iron.
  • the roller close contact portions may be formed in a pair to be symmetrical to each other so that the roller close contact portions are in close contact with the rollers.
  • the roller close contact portions may have a V shape protruding in a circumferential direction of the rollers.
  • the gas discharge portion may include one or more gas guide grooves which guide the produced gas to the outside from the roller.
  • the gas guide groove may extend along a surface of the roller close contact portion.
  • the gas guide grooves may be formed to be symmetrical to each other along the surfaces of the roller close contact portions.
  • the gas discharge portion may further include one or more gas discharge grooves which are formed in a horizontal direction with respect to a close contact surface of the roller close contact portion and discharge gas.
  • the one or more gas discharge grooves may be formed at predetermined intervals in the horizontal direction with respect to the gas guide groove.
  • the gas discharge groove and the gas guide groove may intersect each other.
  • An internal cross-sectional shape of each of the gas discharge groove and the gas guide groove may be any one of triangular, quadrangular, and semi-circular shapes.
  • the roller close contact portion may have a concave-convex portion in which a groove portion and a protruding portion are alternately formed by the gas guide groove.
  • the protruding portion of the concave-convex portion may have a conical shape.
  • the protruding portion which is in close contact with the roller, may have a double structure including a first contact portion and a second contact portion.
  • the first contact portion of the protruding portion may be structured to initially come into contact with the roller.
  • the second contact portion of the protruding portion may be structured to come into contact with the roller after the first contact portion is abraded because of the contact with the roller.
  • the cheek plate may further include one or more drilled holes which are formed at positions adjacent to the gas guide grooves and guide discharge of gas.
  • the gas, which is produced when processing reduced iron is effectively discharged, and as a result, it is possible to solve a problem of a limitation in supplying reduced iron powder, and it is also possible to prevent a loss of reduced iron powder.
  • FIG. 1 is a view schematically illustrating a cheek plate for an apparatus for agglomerating reduced iron according to the exemplary embodiment of the present invention.
  • FIG. 2 is a view schematically illustrating the cheek plate according to the exemplary embodiment of the present invention
  • FIG. 3 is a cross-sectional view taken along line A-A in FIG. 2 .
  • a cheek plate 1 for an apparatus for agglomerating reduced iron is a structure that is in close contact with a lateral side of each of two rotating rollers 2 and blocks leakage of reduced iron.
  • the cheek plate 1 broadly includes a cover portion 10, roller close contact portions 20, and gas discharge portions 30, and serves simultaneously to prevent the reduced iron from leaking to the outside and discharge gas produced from the reduced iron to the outside in a state in which the cheek plate 1 is in close contact with the roller 2.
  • the cover portion 10 which defines a body of the cheek plate 1 and has a fan shape, is installed at each of both sides of the pair of rollers 2 for processing the reduced iron and prevents the reduced iron from leaking to a lateral space formed between the rollers 2, and the roller close contact portions 20 protrude from inner rim portions of the cover portion 10 and are in close contact with outer portions of the rollers 2 to maintain airtightness of the space between the rollers 2.
  • the gas discharge portion 30 of the cheek plate 1 extends along a plate surface of the roller close contact portion 20 and discharges gas produced when processing the reduced iron.
  • the roller close contact portions 20 are structured to be disposed in a pair to be symmetrical to each other so that the roller close contact portions 20 are in close contact with the rollers 2.
  • the roller close contact portions 20 have a V-shaped structure protruding in a circumferential direction of the rollers 2, and the roller close contact portion 20 of the cheek plate 1 has an arc shape having a curvature so as to be effectively in close contact with the lateral side of the rotating roller 2.
  • the gas discharge portion 30 has one or more gas guide grooves 31 that guide the produced gas to the outside from the roller 2.
  • the gas guide groove 31 extends along a surface of the roller close contact portion 20.
  • the gas guide grooves 31 may be structured to be symmetrical to each other along the surfaces of the roller close contact portions 20.
  • the gas which is produced when compressing and molding reduced iron powder between the rollers 2, may be discharged through a portion where the roller 2 and the roller close contact portion 20 of the cheek plate 1 are in contact with each other.
  • a contact portion between the roller 2 and the cheek plate 1 is not perfectly airtight, and as a result, a gap of several micrometers to several hundreds of nanometers is present in the contact portion, such that the gas may be discharged through the gap, but discharge resistance is increased as the contact portion is widened.
  • the gas discharge portion 30 is configured by forming the multiple gas guide grooves 31 on the contact portion in order to reduce the discharge resistance, an area of the close contact portion is decreased, such that the discharge resistance may be decreased, and the gas may be discharged along the formed gas guide grooves 31, thereby assisting in discharging the gas produced when compressing the reduced iron powder.
  • a depth of the gas guide groove 31 formed in the roller close contact portion 20 may be maintained within a range from 10 mm to 40 mm.
  • the compressed gas is discharged through the gas discharge portion 30, and an overall contact area between the roller 2 and the roller close contact portion 20 is decreased because of the gas guide groove 31 formed as described above, but close contact pressure is increased, thereby improving a sealing effect of the reduced iron.
  • FIG. 4 is a view schematically illustrating another structure of the cheek plate according to the exemplary embodiment of the present invention.
  • FIG. 5 is a cross-sectional view taken along line A-A in FIG. 4 .
  • FIG. 6 is a cross-sectional view taken along line B-B in FIG. 4 .
  • the gas discharge portion 30 may further include one or more gas discharge grooves 32 which are formed in a horizontal direction with respect to the close contact surface of the roller close contact portion 20 and discharges gas.
  • the one or more gas discharge grooves 32 are formed at predetermined intervals in the horizontal direction with respect to the gas guide groove 31, and the gas discharge groove 32 and the gas guide groove 31 intersect each other.
  • An internal cross-sectional shape of each of the gas discharge groove 32 and the gas guide groove 31 may be any one of triangular, quadrangular, and semi-circular shapes.
  • the gas discharge groove 32 may be further formed in addition to the gas discharge portion 30 in order to more effectively discharge gas from the cheek plate 1, and the gas discharge groove 32 and the gas guide groove 31 may be shaped in various shapes.
  • FIG. 7 is a view schematically illustrating another structure of the gas discharge portion according to the exemplary embodiment of the present invention.
  • the roller close contact portion 20 has concave-convex portions in which groove portions 21 and protruding portions 22 are alternately formed by the gas guide groove 31, and the protruding portion 22 of the concave-convex portion has a conical shape.
  • Initial abrasion is promoted as the contact area between the roller 2 and the roller close contact portion 20 is decreased, such that the roller close contact portion 20 is in closer contact with the roller, and then an abrasion rate may be decreased by increasing the contact area.
  • the protruding portion 22 which is in close contact with the roller 2, is formed to have a double structure including a first contact portion 22a and a second contact portion 22b.
  • the first contact portion 22a of the protruding portion 22 is structured to initially come into contact with the roller 2
  • the second contact portion 22b of the protruding portion 22 is structured to come into contact with the roller 2 after the first contact portion 22a is abraded because of the contact with the roller 2.
  • the close contact surface of the roller close contact portion 20, which is in contact with the roller 2 has the multiple first contact portions 22a and the multiple second contact portions 22b, thereby decreasing an abrasion rate of the roller close contact portion 20.
  • FIG. 8 is a view schematically illustrating another exemplary embodiment of the cheek plate according to the exemplary embodiment of the present invention.
  • FIG. 9 is a cross-sectional view taken along line A-A in FIG. 8 .
  • one or more drilled holes 33 capable of guiding the discharge of the gas may be further formed at positions adjacent to the gas guide grooves 31.
  • the multiple drilled holes 33 are formed at predetermined intervals at the periphery of the gas guide grooves 31, thereby more effectively discharging the gas produced from the reduced iron.
  • the gas produced when processing the reduced iron is effectively discharged, and as a result, it is possible to solve a problem of a limitation in supplying the reduced iron powder, prevent a loss of the reduced iron powder, and discharge the gas while increasing close contact force between the roller 2 and the cheek plate 1, thereby smoothly manufacturing briquettes (HCl) and improving quality of the produced briquettes.
  • Cheek plate 2 Roller 10: Cover portion 20: Roller close contact portion 21: Groove portion 22: Protruding portion 22a: First contact portion 22b: Second contact portion 30: Gas discharge portion 31: Gas guide groove 32: Gas discharge groove 33: Drilled hole

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
  • Manufacture Of Iron (AREA)
  • Press Drives And Press Lines (AREA)
  • Cleaning In General (AREA)
  • Drying Of Solid Materials (AREA)
EP16851970.0A 2015-10-02 2016-06-07 Vorrichtung zum agglomerieren von reduziertem eisen mit einer wangenplatte Active EP3358024B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150139327A KR101649546B1 (ko) 2015-10-02 2015-10-02 환원철 괴상화 장치의 치크 플레이트
PCT/KR2016/005995 WO2017057822A1 (ko) 2015-10-02 2016-06-07 환원철 괴상화 장치의 치크 플레이트

Publications (3)

Publication Number Publication Date
EP3358024A1 true EP3358024A1 (de) 2018-08-08
EP3358024A4 EP3358024A4 (de) 2018-10-10
EP3358024B1 EP3358024B1 (de) 2020-05-06

Family

ID=56875146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16851970.0A Active EP3358024B1 (de) 2015-10-02 2016-06-07 Vorrichtung zum agglomerieren von reduziertem eisen mit einer wangenplatte

Country Status (5)

Country Link
EP (1) EP3358024B1 (de)
KR (1) KR101649546B1 (de)
CN (1) CN108138256B (de)
BR (1) BR112018006594A2 (de)
WO (1) WO2017057822A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020104526A1 (de) 2020-02-20 2021-08-26 Maschinenfabrik Köppern Gmbh & Co. Kg Hochdruck-Walzenpresse
DE202021103408U1 (de) 2021-06-25 2022-04-04 Maschinenfabrik Köppern Gmbh & Co. Kg Hochdruck-Walzenpresse
DE102021103573A1 (de) 2021-02-16 2022-08-18 Maschinenfabrik Köppern GmbH & Co KG Hochdruck-Walzenpresse

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3733500C2 (de) * 1987-10-03 1993-11-04 Alexanderwerk Ag Verfahren und walzenpresse zum herstellen von stueckigem material aus feinteiligem rauchgasgips
US5102058A (en) * 1990-05-07 1992-04-07 Ag Processing Inc., A Cooperative Cheek plate for milling apparatus
JP3171367B2 (ja) * 1994-08-19 2001-05-28 新東工業株式会社 ブリケットマシン
KR100825580B1 (ko) * 2002-05-02 2008-04-25 주식회사 포스코 조립이 용이한 괴상화 환원철 제조장치
KR101043078B1 (ko) * 2004-06-30 2011-06-21 주식회사 포스코 치크 플레이트 가압 장치 및 이를 이용한 브리켓 제조장치
WO2006004350A1 (en) * 2004-06-30 2006-01-12 Posco Apparatus for manufacturing compacted irons of reduced materials comprising fine direct reduced irons and apparatus for manufacturing molten irons using the same
JP5844552B2 (ja) * 2011-06-01 2016-01-20 三井造船株式会社 ペレット又はフレーク状物の製造方法及び装置
JP5851781B2 (ja) * 2011-09-26 2016-02-03 三井造船株式会社 ガスハイドレート圧縮成形装置
KR101424609B1 (ko) * 2012-06-27 2014-07-31 주식회사 포스코 분환원철 괴성화 장치
KR101527555B1 (ko) * 2013-10-25 2015-06-09 주식회사 포스코 브리켓 제조장치 및 브리켓 제조장치의 치크 플레이트

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020104526A1 (de) 2020-02-20 2021-08-26 Maschinenfabrik Köppern Gmbh & Co. Kg Hochdruck-Walzenpresse
WO2021164919A1 (de) 2020-02-20 2021-08-26 Maschinenfabrik Köppern Gmbh & Co. Kg Hochdruck-walzenpresse
DE102020104526B4 (de) 2020-02-20 2024-03-28 Maschinenfabrik Köppern Gmbh & Co. Kg Hochdruck-Walzenpresse
US12330167B2 (en) 2020-02-20 2025-06-17 Maschinenfabrik Koeppern Gmbh & Co. Kg High-pressure roller press
DE102021103573A1 (de) 2021-02-16 2022-08-18 Maschinenfabrik Köppern GmbH & Co KG Hochdruck-Walzenpresse
WO2022174957A1 (de) 2021-02-16 2022-08-25 Maschinenfabrik Köppern Gmbh & Co. Kg Hochdruck-walzenpresse
DE102021103573B4 (de) 2021-02-16 2024-06-13 Maschinenfabrik Köppern Gmbh & Co. Kg Hochdruck-Walzenpresse
US12508594B2 (en) 2021-02-16 2025-12-30 Maschinenfabrik Koeppern Gmbh & Co. Kg High-pressure roller press
DE202021103408U1 (de) 2021-06-25 2022-04-04 Maschinenfabrik Köppern Gmbh & Co. Kg Hochdruck-Walzenpresse

Also Published As

Publication number Publication date
BR112018006594A2 (pt) 2018-10-23
EP3358024A4 (de) 2018-10-10
EP3358024B1 (de) 2020-05-06
CN108138256B (zh) 2019-11-01
WO2017057822A1 (ko) 2017-04-06
KR101649546B1 (ko) 2016-08-19
CN108138256A (zh) 2018-06-08

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