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WO2011034195A1 - Procédé de production de ferrocoke - Google Patents

Procédé de production de ferrocoke Download PDF

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Publication number
WO2011034195A1
WO2011034195A1 PCT/JP2010/066272 JP2010066272W WO2011034195A1 WO 2011034195 A1 WO2011034195 A1 WO 2011034195A1 JP 2010066272 W JP2010066272 W JP 2010066272W WO 2011034195 A1 WO2011034195 A1 WO 2011034195A1
Authority
WO
WIPO (PCT)
Prior art keywords
iron ore
coke
ferro
particle size
less
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.)
Ceased
Application number
PCT/JP2010/066272
Other languages
English (en)
Japanese (ja)
Inventor
藤本英和
庵屋敷孝思
佐藤秀明
佐藤健
角広行
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.)
JFE Steel Corp
Original Assignee
JFE 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 JFE Steel Corp filed Critical JFE Steel Corp
Priority to BR112012005754A priority Critical patent/BR112012005754A2/pt
Priority to CN2010800408932A priority patent/CN102498190A/zh
Priority to KR1020147024518A priority patent/KR20140130458A/ko
Priority to EP10817308.9A priority patent/EP2463356A4/fr
Priority to US13/391,660 priority patent/US20120144734A1/en
Publication of WO2011034195A1 publication Critical patent/WO2011034195A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
    • C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
    • 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
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates

Definitions

  • the present invention relates to a ferro-coke manufacturing method in which a mixture of coal and iron ore is molded and subjected to dry distillation.
  • coke produced by carbonizing coal in a chamber-type coke oven is charged into the blast furnace.
  • the coke charged in the blast furnace has a role of a spacer for improving ventilation in the blast furnace, a role as a reducing material, a role as a heat source, and the like.
  • a technique for obtaining ferro-coke for metallurgy by mixing iron ore with coal, molding and dry distillation is known.
  • Non-Patent Document 1 a continuous molding coke production method using a vertical carbonization furnace
  • the production of a ferro-coke using a vertical carbonization furnace is also being studied.
  • a vertical shaft furnace composed of chamotte bricks instead of silica brick is used as a carbonization furnace, and coal is molded into a predetermined size in the cold and then charged into the vertical shaft furnace.
  • the charcoal is dry-distilled by heating using a circulating heat medium gas to produce a molded coke.
  • the coal is gradually formed into coke while descending the vertical shaft furnace, cooled by the cooling gas blown from the bottom of the vertical shaft furnace, and discharged outside the furnace.
  • ferro-coke produced by carbonization using the vertical distillation furnace is a high-strength ferro-coke because the reaction load in the blast furnace is larger than that of normal coke when used as a raw material for the blast furnace. It is desirable.
  • room furnace coke a normal metallurgical coke produced in a chamber furnace type coke oven is referred to as “room furnace coke”.
  • Patent Document 1 One of the factors governing the strength of ferro-coke is the grain size of iron ore.
  • Patent Document 1 there is a description that a 92 cc sized ferrocoke was produced by blending up to 75% of iron ore with a particle size of 10 mm or less with respect to the total amount. It is said that the strength of the molded ferrocoke with iron ore is maintained when it is added in an amount of 6 to 65% by weight based on the amount.
  • Patent Document 2 since ferro-coke promotes the reducing property of sintered ore, ferro-coke and sintered ore (iron ore) are mixed and charged into the blast furnace.
  • the size of the ferro-coke in the upper part of the blast furnace is approximately the same size as the sintered ore (about 6 cc), and 92 cc described in Patent Document 1 is too large.
  • the upper limit of the size of the iron ore to be blended is considered to be smaller.
  • the reduction of the iron ore is likely to proceed if the particle size of the iron ore is small, it is considered that what particle size of the iron ore is used as the ferrocoke raw material is very important.
  • lump iron ore that is brought into a steel mill is sieved with a sieve of about 10 mm, the iron ore on a sieve with a large particle size is passed to a blast furnace, and the iron ore under a sieve with a small particle size is sintered Sent to the factory.
  • iron ore under the sieve is used as a raw material for ferro-coke, iron ore having a particle size of 10 mm or less is blended with coal.
  • the equipment configuration, equipment cost, operating cost, etc. for ferro-coke production vary.
  • Ferro-coke (size 6 cc, average particle size 22 mm) containing iron ore with a particle size of 10 mm has a large structural defect inside, and there is a concern about a decrease in strength.
  • the particle size of the iron ore is large, the reduction rate can be reduced even under the same dry distillation conditions as compared with the case where the particle size is small.
  • the present invention produces high-strength ferro-coke while maintaining the target reduction rate by optimizing the particle size of the iron ore used as a raw material when producing ferro-coke having a relatively small particle size.
  • An object of the present invention is to provide a process for producing a molded ferro-coke for metallurgy that can be used.
  • the present invention provides a method for producing ferro-coke, in which coal and iron ore having a maximum particle size of 1 to 2 mm are mixed to produce a molded product, and the molded product is dry-distilled. To do.
  • the said iron ore has an iron content rate of 63 mass% or less.
  • the iron content of the iron ore is more preferably 55 to 63 mass%.
  • the iron ore preferably has an iron ore content of 40 mass% or less based on the total amount of coal and iron ore.
  • the blending ratio of iron ore is 40 mass% or less, the caking component of coal is secured in the molded product, and the strength does not decrease. More preferably, the iron ore content is 1 to 40 mass%.
  • the iron ore is under a sieve obtained by sieving with a sieve having a sieve mesh of 1 to 2 mm. It is desirable that the coal has a particle size of 3 mm or less. In order to improve the strength of ferro-coke, a particle size of 2 mm or less is more preferable.
  • the production of the molded product comprises producing a molded product by mixing coal, iron ore having a maximum particle size of 1 to 2 mm, and a binder.
  • the binder preferably has an addition amount of 4 to 6 mass% with respect to the total amount of coal and iron ore.
  • the ferro-coke preferably has a size of 0.5 to 25 cc. It is more preferably 5 to 8 cc. This is because, in order to ensure the air permeability of the blast furnace, it is desirable to use 6 cc which is almost the same size as the sintered ore.
  • high strength ferro-coke can be produced while maintaining the target reduction rate.
  • the graph which shows the relationship between the green strength of a molding, and an iron ore particle size The graph which shows the relationship between the reduction rate of a molding after dry distillation, and an iron ore particle size. The graph which shows the relationship between the intensity
  • an iron ore having a maximum particle size of 1 to 2 mm refers to an iron ore under sieving obtained by sieving crushed iron ore using a 1 mm sieve mesh, and a particle size of 1 mm or less ( ⁇ 1 mm). It describes. Therefore, as the iron ore used in the present embodiment, it is preferable to use raw iron ore as it is or after pulverization and then sieving with a sieve having a sieving size of 1 to 2 mm and sieving.
  • iron ore used as a molding material When iron ore used as a molding material is pulverized to a particle size of 0.25 mm or less, the strength of the molding is reduced unless a large amount of binder is added. Therefore, it is not preferable to grind iron ore to a particle size of 0.25 mm or less.
  • the iron ore particle size is 2 mm or less, the reduction rate of ferro-coke after dry casting can be 80% or more.
  • the iron ore particle size is from 1 mm or less to 3 mm or less, the drum strength of ferro-coke after the dry distillation of the molded product can be maintained sufficiently high. Therefore, by using iron ore whose particle size is adjusted from 1 mm or less to 2 mm or less as a raw material, it is possible to obtain ferro-coke having a high reduction rate and drum strength.
  • an iron ore with an iron content exceeding 63 mass% When using an iron ore with an iron content exceeding 63 mass%, if the iron ore particle size is large, cracking is likely to occur based on metallic iron produced by reduction of the iron ore. Therefore, an iron ore with an iron content of 63 mass% or less is used. It is preferable to use stone. When the iron content is 63 mass% or less, even if the particle size of the iron ore is increased, cracking does not occur based on the metallic iron produced by the reduction of the iron ore.
  • the iron content of the iron ore is more preferably 55 to 63 mass%. When using iron ore with an iron content exceeding 63 mass%, the iron ore particle size preferably does not exceed 1 mm.
  • the coal used as the molding material is preferably pulverized to a particle size of 3 mm or less. If the particle size exceeds 3 mm, fusion between the molded products during dry distillation tends to occur, and the strength of ferrocoke after the molded product dry distillation may not be improved. From the viewpoint of improving the strength of ferro-coke, it is more preferable that the particle size of the coal be 2 mm or less. As the coal, it is preferable to use a mixture of slightly caking coal and non-caking coal.
  • the iron ore is preferably blended in an amount of 40 mass% or less based on the total amount of the raw material (total amount of coal and iron ore). More preferably, the iron ore content is 1 to 40 mass%. Most preferably, it is 10 to 40 mass%. If the iron ore content exceeds 40 mass%, the caking component of coal is relatively reduced in the molded product, and the carbon in the ferrocoke is consumed as the iron ore is reduced, and the ferrocoke becomes porous. , The strength is greatly reduced.
  • a binder When producing a molded product, it is preferable to add a binder to coal and iron ore.
  • the addition amount of the binder is preferably 4 to 6 mass% with respect to the total amount of coal and iron ore.
  • the molded product of coal and iron ore is manufactured using, for example, a molding machine by kneading coal, iron ore, and a binder with a high-speed mixer. Ferro-coke is produced by carbonizing the molded product using a carbonization furnace or the like.
  • a binder When molding the molded product, a binder was added in an amount of 6 mass% with respect to the total mass of the raw materials for coal and iron ore, and kneaded at 140 to 160 ° C. for about 2 minutes. Briquettes were produced from the kneaded raw materials using a double roll type molding machine.
  • the roll size of the molding machine was 650 mm ⁇ ⁇ 104 mm, and the molding was performed at a peripheral speed of 0.2 m / s and a linear pressure of 4 to 5 t / cm.
  • the size of the molded product is 30 mm ⁇ 25 mm ⁇ 18 mm (6 cc), and the shape is an egg shape.
  • Table 2 shows the raw material conditions of the molded product.
  • Coal was pulverized so that the total particle size was 3 mm or less.
  • the coal was a mixture of slightly caking coal and non-caking coal.
  • the particle size of iron ore is 0.1 mm or less (-0.1 mm), 0.25 mm or less (-0.25 mm), 0.5 mm or less (-0.5 mm), 1.0 mm or less by sieving after grinding. ( ⁇ 1.0 mm), 1.5 mm or less ( ⁇ 1.5 mm), 2.0 mm or less ( ⁇ 2.0 mm), 2.5 mm or less ( ⁇ 2.5 mm), 3.0 mm or less ( ⁇ 3.0 mm) Of each.
  • Iron ore was blended with coal so as to be 30 mass% with respect to the total amount of the raw material. Four types of iron ores with different iron contents were prepared and used for the test. Table 3 shows the iron content of each iron ore used.
  • Table 4 shows the particle size distribution of the used iron ore A.
  • Fig. 1 shows the relationship between the strength of the molded product (green strength) and the iron ore particle size.
  • the strength of the molded product was evaluated by using a type I drum test apparatus (cylindrical shape having an inner diameter of 130 mm ⁇ 700 mm) based on a residual rate of 16 mm or more after 30 rotations at a rotation speed of 20 rotations per minute.
  • a type I drum test apparatus cylindrical shape having an inner diameter of 130 mm ⁇ 700 mm
  • Fig. 2 shows the relationship between the reduction rate after dry casting and the iron ore particle size.
  • the reduction rate was almost constant when the iron ore particle size was 0.5 mm or less, but the reduction rate gradually decreased when the particle size was larger than that, and decreased approximately 10% when the iron ore particle size was 3 mm or less. This is presumably because the reduction of the iron ore center part has decreased.
  • the target reduction rate is 80% or more
  • the iron ore particle size is desirably 2 mm or less in any ore type.
  • Fig. 3 shows the relationship between the strength after dry casting and the iron ore particle size.
  • the strength after dry distillation was evaluated by using a drum tester with a residual rate of 6 mm or more after 150 rotations.
  • the ores A, B and C having an iron content of 63 mass% or less had a reduced strength when the iron ore particle size was 0.5 mm or less.
  • One possible reason is that when the iron ore particle size becomes finer, the coke portion becomes porous (increased porosity) as the iron ore reduction proceeds. It can be seen that if the target value of strength after dry distillation (drum strength) is 82 or more, the target value of drum strength is cleared if the total iron ore particle size is 1 mm or less to 3 mm or less.
  • FIG. 4 shows the relationship between iron ore content and strength after dry distillation for ore A and ore C.
  • the strength after dry distillation gradually decreased as the iron ore blending ratio increased.
  • the iron ore compounding ratio exceeded 40 mass%, a significant decrease in strength was observed. It is considered that the caking component of coal decreases as the iron ore content increases, and that the carbon in the ferrocoke is consumed as the iron ore is reduced and the inside of the ferrocoke becomes porous, resulting in a decrease in strength.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Coke Industry (AREA)

Abstract

Cette invention concerne un procédé de production d'un ferrocoke moulé pour l'industrie métallurgique permettant d'obtenir un ferrocoke ayant un diamètre de particule relativement petit et une résistance mécanique élevée, tout en conservant un indice de réductibilité prédéterminé, par optimisation de la taille des particules du minerai de fer utilisé à titre de matériau de départ. Le procédé de production de ferrocoke selon l'invention est caractérisé par le mélange du charbon avec un minerai de fer ayant un diamètre de particule maximal de 1 à 2 mm, le moulage du mélange pour obtenir des objets moulés, et la carbonisation des objets moulés. Il est préférable que le minerai de fer ait une teneur de fer de 63 % en poids ou moins, que la proportion de minerai de fer par rapport à la somme du charbon et du minerai de fer soit de 40 % en poids ou moins, et que le minerai de fer soit sous la forme de particules ayant traversé un crible ayant une ouverture de mailles de 1 à 2 mm.
PCT/JP2010/066272 2009-09-15 2010-09-14 Procédé de production de ferrocoke Ceased WO2011034195A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR112012005754A BR112012005754A2 (pt) 2009-09-15 2010-09-14 método para fabricação de um compósito de carbono e ferro
CN2010800408932A CN102498190A (zh) 2009-09-15 2010-09-14 铁焦的制造方法
KR1020147024518A KR20140130458A (ko) 2009-09-15 2010-09-14 페로코크스의 제조 방법
EP10817308.9A EP2463356A4 (fr) 2009-09-15 2010-09-14 Procédé de production de ferrocoke
US13/391,660 US20120144734A1 (en) 2009-09-15 2010-09-14 Method for manufacturing carbon iron composite

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2009-212822 2009-09-15
JP2009212822 2009-09-15
JP2010-201702 2010-09-09
JP2010201702A JP2011084734A (ja) 2009-09-15 2010-09-09 フェロコークスの製造方法

Publications (1)

Publication Number Publication Date
WO2011034195A1 true WO2011034195A1 (fr) 2011-03-24

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PCT/JP2010/066272 Ceased WO2011034195A1 (fr) 2009-09-15 2010-09-14 Procédé de production de ferrocoke

Country Status (7)

Country Link
US (1) US20120144734A1 (fr)
EP (1) EP2463356A4 (fr)
JP (1) JP2011084734A (fr)
KR (2) KR20120035946A (fr)
CN (1) CN102498190A (fr)
BR (1) BR112012005754A2 (fr)
WO (1) WO2011034195A1 (fr)

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JP2016079312A (ja) * 2014-10-20 2016-05-16 Ｊｆｅスチール株式会社 石炭または石炭と金属酸化物との混合物の成型方法
KR20180107171A (ko) 2016-02-24 2018-10-01 제이에프이 스틸 가부시키가이샤 페로코크스의 제조 방법
CN110491454A (zh) * 2019-08-09 2019-11-22 中冶赛迪工程技术股份有限公司 一种高炉冶炼成本管理方法、系统及计算机可存储介质

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CN103756701B (zh) * 2014-01-21 2015-11-25 河北联合大学 高反应性焦炭及其生产方法
US11486022B2 (en) * 2015-02-06 2022-11-01 Jfe Steel Corporation Ferrocoke manufacturing method
JP6249196B2 (ja) * 2015-06-24 2017-12-20 Ｊｆｅスチール株式会社 フェロコークス用成型物の製造方法
KR101982964B1 (ko) 2015-06-24 2019-05-27 제이에프이 스틸 가부시키가이샤 페로코크스의 제조 방법
CN106635067A (zh) * 2016-11-24 2017-05-10 武汉科思瑞迪科技有限公司 一种生产铁焦的竖炉工艺
CN106916599A (zh) * 2017-02-08 2017-07-04 中冶南方工程技术有限公司 一种铁焦生产装置及方法
CN109097515B (zh) * 2018-08-31 2020-03-20 攀钢集团攀枝花钢铁研究院有限公司 利用高钛型钒钛矿烧结返矿制备铁焦的方法及其制备的铁焦
CN111944937A (zh) * 2019-05-14 2020-11-17 宝山钢铁股份有限公司 一种碳铁复合炉料的制备方法
CN113736932A (zh) * 2020-05-29 2021-12-03 宝山钢铁股份有限公司 碳铁复合炉料的制备方法

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See also references of EP2463356A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016079312A (ja) * 2014-10-20 2016-05-16 Ｊｆｅスチール株式会社 石炭または石炭と金属酸化物との混合物の成型方法
KR20180107171A (ko) 2016-02-24 2018-10-01 제이에프이 스틸 가부시키가이샤 페로코크스의 제조 방법
CN110491454A (zh) * 2019-08-09 2019-11-22 中冶赛迪工程技术股份有限公司 一种高炉冶炼成本管理方法、系统及计算机可存储介质
CN110491454B (zh) * 2019-08-09 2022-11-18 中冶赛迪工程技术股份有限公司 一种高炉冶炼成本管理方法、系统及计算机可存储介质

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Publication number Publication date
BR112012005754A2 (pt) 2016-02-16
US20120144734A1 (en) 2012-06-14
EP2463356A1 (fr) 2012-06-13
CN102498190A (zh) 2012-06-13
JP2011084734A (ja) 2011-04-28
KR20140130458A (ko) 2014-11-10
KR20120035946A (ko) 2012-04-16
EP2463356A4 (fr) 2014-06-11

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