WO2013140810A1 - Procédé d'ajustement d'une poudre de précurseur pour frittage, et poudre de précurseur pour frittage - Google Patents

Procédé d'ajustement d'une poudre de précurseur pour frittage, et poudre de précurseur pour frittage Download PDF

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Publication number
WO2013140810A1
WO2013140810A1 PCT/JP2013/001934 JP2013001934W WO2013140810A1 WO 2013140810 A1 WO2013140810 A1 WO 2013140810A1 JP 2013001934 W JP2013001934 W JP 2013001934W WO 2013140810 A1 WO2013140810 A1 WO 2013140810A1
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WIPO (PCT)
Prior art keywords
raw material
powder
ore
coke
particle size
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Ceased
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PCT/JP2013/001934
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English (en)
Japanese (ja)
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WO2013140810A8 (fr
Inventor
憲司 大屋
隆英 樋口
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JFE Steel Corp
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JFE Steel Corp
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Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Priority to KR1020147028654A priority Critical patent/KR101525068B1/ko
Priority to AU2013236700A priority patent/AU2013236700B2/en
Priority to JP2013556705A priority patent/JP5516832B2/ja
Priority to BR112014023425-6A priority patent/BR112014023425B1/pt
Priority to CN201380015426.8A priority patent/CN104204243B/zh
Publication of WO2013140810A1 publication Critical patent/WO2013140810A1/fr
Anticipated expiration legal-status Critical
Publication of WO2013140810A8 publication Critical patent/WO2013140810A8/fr
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    • 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
    • C22B1/16—Sintering; Agglomerating
    • 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 method for adjusting a raw powder for sintered ore for blast furnace and a raw powder for sintered ore obtained thereby.
  • the sintered ore is manufactured by the following method. First, iron ore having a particle size of about 10 mm or less is added to and mixed with coke as a coagulant, CaO-containing auxiliary material such as limestone, SiO 2- containing auxiliary material such as nickel slag, and the like. And mix and granulate with a disk pelletizer. Thereafter, the obtained pelletized raw material for sintered ore is charged together with powdered coke on a pallet of a sintering machine, and a raw material layer for sintered ore is formed on the pallet. Next, the sintered ore raw material layer is ignited through the solid fuel in the surface layer portion.
  • the solid fuel in the sintered ore raw material layer is sequentially burned and sintered by the action of air to form a sintered cake.
  • the sintered cake is crushed and sized, and then a cake having a certain particle size or more is sent to the blast furnace as a blast furnace sintered ore. That is, the sintered ore is obtained by reacting and melting iron ore with a slag component such as a so-called CaO or SiO 2 , agglomerated, and pelletized.
  • the powder coke in the raw material is burned by the air passing through the raw material layer for the sintered ore. That is, it can be said that the productivity is determined by the passing air volume (breathability) of the raw material layer for sintered ore.
  • the air permeability is determined by the cold air permeability before sintering determined by the particle size of iron ore and the pore size of the sintered cake, which is the air flow path generated through the flow of the melt. It is roughly divided into hot air permeability during and after sintering, but the cold air permeability before sintering determined by the particle size of iron ore etc. is the quality of the iron ore raw material mentioned above. It is easily affected by variations, and in recent years it has become a major issue for improving productivity.
  • the present invention has been developed in view of the above-described situation, and is a raw material powder for sintered ore used in a blast furnace, and is excellent in production efficiency of sintered ore even if there is a variation in the particle size of the iron ore raw material. It aims at providing the adjustment method of the raw material powder for sintered ores, and the raw material powder for sintered ores.
  • the inventors have intensively studied to solve the above problems. As a result, when mixing with a disk pelletizer, etc., it is possible to adjust the mixing ratio of the iron ore raw material of a predetermined shape and the powder coke of a predetermined shape in the raw material powder for sintering ore to a certain range. It has been found that it has an advantageous effect on improving efficiency. That is, in the present invention, the cold air permeability before sintering is improved by changing the properties of the powder coke according to the quality of the iron ore raw material (particle size variation). As a result, an excellent sintered pallet The air permeability (JPU index) of the raw material powder for sintered ore (granulated and pseudo-particle raw material) is achieved, and the production efficiency of the sintered ore can be improved.
  • JPU index The air permeability
  • the present invention is based on the above-described knowledge, and the gist configuration is as follows. 1.
  • Particle size in the iron ore raw material the iron ore raw material mass (F) of 0.5 mm or less and the particle size in the powder coke: the mixing ratio of the powder coke mass (C) of 0.5 mm or less [(C / F) ⁇ 100] is adjusted to a range of 7 to 8%.
  • a raw material powder for sintered ore for blast furnace consisting of iron ore raw material, powder coke and auxiliary material, Particle size in the iron ore raw material: the iron ore raw material mass (F) of 0.5 mm or less and the particle size in the powder coke: the mixing ratio of the powder coke mass (C) of 0.5 mm or less [(C / F) ⁇ 100] is a raw material powder for sintered ore in the range of 7 to 8%.
  • the air permeability (JPU index) of the raw material powder for sintered ore in the sintered pallet is stably excellent.
  • the production efficiency of sintered ore can be effectively improved.
  • iron ore raw material, powder coke and auxiliary raw material are mixed and granulated by a disk pelletizer to form raw material powder for sintered ore, and then this raw material powder for sintered ore is charged into a sintering machine.
  • the sintered ore for blast furnace is manufactured by sintering.
  • the productivity at the time of sintering that is, the firing calculated by the following equation (1):
  • the air permeability (JPU index: hereinafter simply referred to as JPU) of the sintered ore raw material powder in the pallet can be maintained high.
  • JPU means that air permeability is so good that a numerical value is large, and about 22 or more is a value made favorable from a viewpoint of productivity at the time of sinter ore manufacture.
  • (JPU) [air volume (m 3 / min) / firing area (m 2 )] ⁇ [layer thickness (mm) / negative pressure (mmAq)] 0.6
  • Air volume The air volume that passes through the raw material powder for sintered ore in a certain sintering area
  • Firing area the area of the raw material powder for sintered ore where the air volume is measured
  • Layer thickness The layer thickness of the raw powder for sintered ore at the location where the air volume was measured
  • the particle size is measured by a sieve classification method (JIS R6001 (1998)).
  • the iron ore raw material used in the present invention include South American hematite ore, North American magnetite ore, South American magnetite ore, Australian pisolite ore and Maramamba ore.
  • the particle size in the iron ore raw material the iron ore raw material mass (F) of 0.5 mm or less and the particle size in the powder coke: the mixing ratio of the powder coke mass (C) of 0.5 mm or less [( C / F) ⁇ 100] is adjusted to a range of 7 to 8%, but the mass of the iron ore raw material when calculating the F is calculated without including the mass of the return ore. Shall.
  • the mechanism for achieving a good JPU by controlling the mixing ratio [(C / F) ⁇ 100] is considered as follows.
  • the mixing ratio is small, that is, less than 7, it means that the ore has a larger particle size than the powder coke particle size. Therefore, if the particle size of the powder coke becomes too small, the sintering speed increases, but the width of the sintered molten zone also increases and the hot air permeability deteriorates.
  • the mixing ratio is large, that is, larger than 8, the particle size of the powder coke is coarsened, and in the granulation process, the generation of pseudo particles having the powder coke as core particles becomes remarkable.
  • the disk pelletizer used in the present invention may be a normal disk pelletizer used for manufacturing (granulating) raw material powder for sintered ore.
  • a drum mixer can also be used by a conventionally well-known method for the lime exterior after preliminary mixing or granulation.
  • the sintering machine used in the present invention is preferably a downward suction droidoid sintering machine.
  • a known sintering machine for producing raw material powder for sintered ore can be used.
  • a raw material powder for sintered ore for a blast furnace that is excellent in production efficiency, which is composed of an iron ore raw material, a powder coke, and an auxiliary material. That is, the particle size in the iron ore raw material excluding reverse ore: mixing of the iron ore raw material mass (F) of 0.5 mm or less and the particle size in the powdered coke: the mass of powder coke of 0.5 mm or less (C)
  • a raw material powder for sintered ore having a ratio [(C / F) ⁇ 100] of 7 to 8%, preferably 7.2 to 7.8% can be obtained.
  • flour etc. the equipment used, and its operating conditions other than what was specified in the above.
  • Example 1 The raw material powder for sintered ore was adjusted under the conditions shown below. Next, the obtained raw material powder for sintered ore was charged and filled in a downward suctioned Dwytroid type sintering machine to produce a sintered ore. JPU at the time of sintering this raw material powder for sinter was investigated and the effect of the present invention was confirmed.
  • Basic unit of iron ore raw material 1100-1200 (kg / t-sr) Ratio of iron ore raw material of 0.5 mm or less: 20 to 35 (% raw material charge)
  • Basic unit of powder coke powder coke 45-50 (kg / t-sr) Ratio of powder coke of 0.5 mm or less: 30-50 (% vs. powder coke)
  • Auxiliary material is limestone: 6 to 10 (% of raw material charged)
  • Disc pelletizer 7.2m diameter
  • FIG. 1 shows the relationship between the mixing ratio [(C / F) ⁇ 100] of iron ore raw material of 0.5 mm or less and fine coke of 0.5 mm or less and JPU. From the figure, the JPU of the raw material powder for sintered ore made at a mixing ratio [(C / F) ⁇ 100] in a range satisfying the conditions of the present invention shows a good value of about 22 or more. In contrast, as shown in FIG. 1, the mixing ratio [(C / F) ⁇ 100] that does not satisfy the conditions of the present invention was inferior to JPU when the JPU was about 19 to 21, that is, 21 or less.
  • Example 2 An embodiment when the present invention is used in an actual machine will be described.
  • the iron ore raw material used in the normal sintering process was automatically sampled in the raw material yard, and then the particle size distribution was measured in accordance with Japanese Industrial Standard JIS 8706.
  • the powdered coke the lump coke produced at the coke factory and the purchased anthracite were accepted at the sintering factory and pulverized until the particle size distribution suitable for operation was used in the sintering process.
  • a device such as a rod mill, a cage mill, or a ball mill was used.
  • the ground coke after pulverization was sampled with a sampler installed in the belt conveyor transfer section, then dried with a dryer, and the particle size distribution was measured with a low-tap sieve.
  • the pulverization condition of the powder coke was adjusted according to the particle size composition of the iron ore that was received, that is, the abundance ratio of 0.5 mm or less, and the abundance ratio of 0.5 mm or less in the powder coke was changed.
  • JPU of the raw material powder for sintered ore made at a mixing ratio [(C / F) ⁇ 100] in a range satisfying the conditions of the present invention shows a good value of about 22 or more.
  • the mixing ratio [(C / F) ⁇ 100] did not satisfy the conditions of the present invention, the JPU was about 19 to 21, that is, 21 or less, which was inferior to the JPU.
  • the mixing ratio of C / F shown in the invention method is adjusted by adjusting not only the pulverizing conditions of the powder coke but also the coarse pulverizing conditions of the iron ore. Can be realized.
  • the present invention it is possible to obtain a raw material powder for sinter having excellent production efficiency of sinter. Further, in addition to improving productivity, the permeability of the sintered ore is maintained and the strength of the sintered ore is improved, so that stable and highly efficient operation of the blast furnace can be achieved.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
PCT/JP2013/001934 2012-03-22 2013-03-21 Procédé d'ajustement d'une poudre de précurseur pour frittage, et poudre de précurseur pour frittage Ceased WO2013140810A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020147028654A KR101525068B1 (ko) 2012-03-22 2013-03-21 소결광용 원료분의 조정 방법 및 소결광용 원료분
AU2013236700A AU2013236700B2 (en) 2012-03-22 2013-03-21 Method for adjusting precursor powder for sintered ore, and precursor powder for sintered ore
JP2013556705A JP5516832B2 (ja) 2012-03-22 2013-03-21 焼結鉱用原料粉の調整方法および焼結鉱用原料粉
BR112014023425-6A BR112014023425B1 (pt) 2012-03-22 2013-03-21 Método para ajustar pó precursor para minério sinterizado, e pó precursor para minério sinte-rizado
CN201380015426.8A CN104204243B (zh) 2012-03-22 2013-03-21 烧结矿用原料粉的调整方法和烧结矿用原料粉

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012066333 2012-03-22
JP2012-066333 2012-03-22

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WO2013140810A1 true WO2013140810A1 (fr) 2013-09-26
WO2013140810A8 WO2013140810A8 (fr) 2014-10-16

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PCT/JP2013/001934 Ceased WO2013140810A1 (fr) 2012-03-22 2013-03-21 Procédé d'ajustement d'une poudre de précurseur pour frittage, et poudre de précurseur pour frittage

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JP (1) JP5516832B2 (fr)
KR (1) KR101525068B1 (fr)
CN (1) CN104204243B (fr)
AU (1) AU2013236700B2 (fr)
BR (1) BR112014023425B1 (fr)
TW (1) TWI473882B (fr)
WO (1) WO2013140810A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019181672A1 (fr) * 2018-03-20 2019-09-26 Ｊｆｅスチール株式会社 Matériau granulé, procédé de production de matériau granulé et procédé de production de minerai fritté
WO2019188668A1 (fr) * 2018-03-29 2019-10-03 Ｊｆｅスチール株式会社 Substance granulée, procédé de production de substance granulée, procédé de production de minerai fritté

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018123750A1 (fr) * 2016-12-28 2018-07-05 Ｊｆｅスチール株式会社 Procédé de fabrication de minerai fritté
KR102394730B1 (ko) * 2017-04-17 2022-05-04 제이에프이 스틸 가부시키가이샤 소결광의 제조 방법
CN114264585B (zh) * 2020-09-16 2023-11-14 宝山钢铁股份有限公司 生产用碳铁复合炉料的透气性模拟测定方法
EP4286546A1 (fr) * 2023-02-23 2023-12-06 Tata Steel IJmuiden B.V. Procédé de fabrication de granulés frittés

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118215A (en) * 1977-03-26 1978-10-16 Sumitomo Metal Ind Ltd Sintering method
JPH024658B2 (fr) * 1985-06-27 1990-01-30 Nippon Kokan Kk
JPH07331343A (ja) * 1994-05-31 1995-12-19 Nippon Steel Corp 排ガス循環焼結操業方法
JP2008101263A (ja) * 2006-10-20 2008-05-01 Nippon Steel Corp 焼結原料の造粒方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH089739B2 (ja) * 1989-08-23 1996-01-31 日本鋼管株式会社 焼成塊成鉱の製造方法
KR100587709B1 (ko) * 2003-03-20 2006-06-08 가부시키가이샤 고베 세이코쇼 소결광의 제조방법
JP5004421B2 (ja) * 2004-09-17 2012-08-22 Ｊｆｅスチール株式会社 焼結鉱の製造方法
JP4661154B2 (ja) * 2004-10-01 2011-03-30 Ｊｆｅスチール株式会社 焼結鉱の製造方法
CN101928824B (zh) * 2009-06-22 2013-05-01 鞍钢股份有限公司 降低烧结固体燃耗、提高强度的烧结矿生产方法
CN102206744B (zh) * 2010-03-29 2013-04-10 攀钢集团钢铁钒钛股份有限公司 一种烧结混合料制粒的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118215A (en) * 1977-03-26 1978-10-16 Sumitomo Metal Ind Ltd Sintering method
JPH024658B2 (fr) * 1985-06-27 1990-01-30 Nippon Kokan Kk
JPH07331343A (ja) * 1994-05-31 1995-12-19 Nippon Steel Corp 排ガス循環焼結操業方法
JP2008101263A (ja) * 2006-10-20 2008-05-01 Nippon Steel Corp 焼結原料の造粒方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019181672A1 (fr) * 2018-03-20 2019-09-26 Ｊｆｅスチール株式会社 Matériau granulé, procédé de production de matériau granulé et procédé de production de minerai fritté
CN111902549A (zh) * 2018-03-20 2020-11-06 杰富意钢铁株式会社 造粒物、造粒物的制造方法和烧结矿的制造方法
CN111902549B (zh) * 2018-03-20 2022-11-15 杰富意钢铁株式会社 造粒物、造粒物的制造方法和烧结矿的制造方法
WO2019188668A1 (fr) * 2018-03-29 2019-10-03 Ｊｆｅスチール株式会社 Substance granulée, procédé de production de substance granulée, procédé de production de minerai fritté

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Publication number Publication date
JP5516832B2 (ja) 2014-06-11
JPWO2013140810A1 (ja) 2015-08-03
CN104204243B (zh) 2016-05-04
BR112014023425B1 (pt) 2019-05-28
KR20140134327A (ko) 2014-11-21
AU2013236700A1 (en) 2014-10-02
KR101525068B1 (ko) 2015-06-02
WO2013140810A8 (fr) 2014-10-16
AU2013236700B2 (en) 2015-04-23
TWI473882B (zh) 2015-02-21
CN104204243A (zh) 2014-12-10
TW201339314A (zh) 2013-10-01

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