WO2017026203A1 - 焼結鉱の製造方法 - Google Patents

焼結鉱の製造方法 Download PDF

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Publication number
WO2017026203A1
WO2017026203A1 PCT/JP2016/069840 JP2016069840W WO2017026203A1 WO 2017026203 A1 WO2017026203 A1 WO 2017026203A1 JP 2016069840 W JP2016069840 W JP 2016069840W WO 2017026203 A1 WO2017026203 A1 WO 2017026203A1
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WO
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Prior art keywords
raw material
sintered
speed
sintered ore
ore
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Application number
PCT/JP2016/069840
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English (en)
French (fr)
Japanese (ja)
Inventor
寿幸 廣澤
隆英 樋口
山本　哲也
大山　伸幸
Original Assignee
Ｊｆｅスチール株式会社
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.)
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Application filed by Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to CN201680044876.3A priority Critical patent/CN107849633B/zh
Priority to TR2018/01470T priority patent/TR201801470T1/tr
Priority to KR1020187003837A priority patent/KR102085054B1/ko
Publication of WO2017026203A1 publication Critical patent/WO2017026203A1/ja
Priority to PH12018550011A priority patent/PH12018550011A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • 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
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/12—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/14—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating dishes or pans
    • 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

Definitions

  • the present invention relates to a method for producing sintered ore as a blast furnace raw material, which is produced by using a DL-type sintering machine after granulation of the sintered raw material.
  • Sintered ore consists of several brands of fine iron ore (generally called sinter feed of about 125-1000 ⁇ m), auxiliaries such as limestone, quartzite, and serpentine, dust, scale, return ore, etc. Mixing and granulating a mixture of granulated raw material powder and solid fuel such as coke breeze in an appropriate amount, adding water, charging the resulting granulated material into a sintering machine Manufactured by firing. Generally, the sintered blending raw material contains moisture, and aggregates into pseudo particles during granulation. This pseudo-granulated raw material for sintering, when placed on the pallet of the sintering machine, helps to ensure good ventilation of the sintered raw material charging layer and facilitates the sintering reaction. Proceed to
  • powder iron ore for sintering has been lowered in quality by depletion of high-quality iron ore. That is, the lower grade of iron ore leads to an increase in slag components and a tendency to pulverization, and therefore the granulation properties are decreased due to an increase in the alumina content and an increase in the pulverization ratio.
  • sintered ore used in the blast furnace is required to have a low slag ratio, high reducibility, and high strength from the viewpoint of reducing hot metal production cost in the blast furnace and reducing CO 2 generation amount. .
  • Patent Document 6 a method of conditioning and mixing with a high-speed rotary mixer
  • Patent Document 8 a method of premixing fine powder (pellet feed) with an Eirich mixer and then granulating with a drum mixer
  • Patent Document 9 a method of premixing fine powder (pellet feed) with an Eirich mixer and then granulating with a drum mixer
  • Japanese Patent Publication No.2-4658 Japanese Patent Publication No. 6-21297 Japanese Patent Publication No. 6-21298 Japanese Patent Publication No. 6-21299 Japanese Patent Publication No. 6-60358 JP 60-52534 A JP-A-1-312036 JP-A-7-331342 JP 2001-247020 A
  • the sintered blending raw material containing a large amount of fine iron ore, particularly ultra fine iron ore such as pellet feed, is granulated using the HPS method as described in Patent Documents 1 to 5,
  • the method of mixing in advance using a high-speed stirrer as described in Patent Documents 6 to 9 has the following problems.
  • the blended raw material containing a large amount of fine iron ore such as pellet feed when granulated, inevitably becomes uneven in particle size, and the fine powder is merely agglomerated, and the bond strength is weak.
  • Coarse pseudo particles are easily generated. Therefore, when such pseudo particles are charged and deposited on the pallet of the sintering machine, as shown in FIG. 3 (a), the sintered raw material charging layer has a dense deposition structure and a bulk density. Becomes larger. Moreover, if such coarse pseudo-particles are deposited on a pallet of a sintering machine with a certain layer thickness, they are easily broken when a load (compressive force) is applied to the pseudo-particles.
  • the object of the present invention is to use a fine ore as a raw material for the production of sintered ore, granulate appropriate pseudo particles, and improve the productivity of the sintered ore. It is to propose a manufacturing method.
  • the inventors have previously processed a granulated raw material having a predetermined amount of fine powder having a predetermined particle size by a high-speed agitator, and thereafter granulated.
  • the present invention was developed after finding out what can be done.
  • the present invention relates to a method for producing a sintered ore in which a sintered raw material is granulated and then sintered with a sintering machine to obtain a sintered ore, wherein the sintered raw material containing 10 to 50 mass% of fine iron ore of 125 ⁇ m or less is obtained.
  • the pretreatment is performed with a high-speed agitator and then granulated with a granulator.
  • the granulator is a drum mixer and / or a disk pelletizer; (4) In the granulation of the granulator, the treated raw material is coated with limestone, and the surface of the granulated particles is coated with a solid fuel, (5)
  • the sintering raw material at least one kind contains crystal water ore, and the content of crystal water is 4 mass% or more, (6) containing 5 mass% or more of limestone in the fine iron ore of 125 ⁇ m or less, (7)
  • slaked lime or quicklime is added in an amount of 3 mass% or less to the sintered raw material to be processed with the high-speed stirrer.
  • the sintering raw material used for the high-speed stirrer when the proportion of fine iron ore is 30 mass% or more, the raw material is dried. Is considered to be a more preferable solution.
  • fine iron ore and fine particles are agglomerated firmly, or a structure in which fine iron ore or the like is adhered around the core particles is a sintered particle composed of pseudo particles having a relatively uniform particle size and a small particle size distribution.
  • the manufacturing method of the granulation raw material for ligation is proposed.
  • the granulated raw material for sintering obtained by such a method is placed on a pallet of a sintering machine, the density of the sintered raw material charging layer formed on the pallet is reduced and the air permeability is improved.
  • the firing time can be shortened, which is effective in improving the productivity of high-quality sintered ore.
  • FIG. 4 is a diagram for explaining an example of an equipment row for carrying out the method for producing a sintered ore according to the present invention.
  • the method for producing a sintered ore according to the present invention will be described with reference to FIG. 4.
  • a sintering raw material 11 containing 10 to 50 mass% of fine iron ore of 125 ⁇ m or less is prepared.
  • Sintering raw material 11 includes the above-mentioned 10-50 mass% pellet feed of 125 ⁇ m or less, fine iron ore that is tailing ore, and fine iron ore with the remainder being cinder feed, as well as returned ore, quartzite, lime, quicklime, etc. It is preferable to consist of other raw materials.
  • the reason why the sintering raw material 11 is limited to one containing 10 to 50 mass% of fine iron ore of 125 ⁇ m or less is as follows.
  • the invention range of the fine iron ore is set to produce coarse particles with irregular particle sizes and weak bond strength. If it is less than 10%, pseudo particles with low bond strength cannot be formed, and 50%. If exceeding the above, there is a problem that coarse particles having a weak bond strength can be formed in the same manner.
  • the upper limit is set to 50% without adding more than 50 mass% of fine iron ore of 125 ⁇ m or less. The reason why the particle size is set to 125 ⁇ m or less is that when the particle size is 125 ⁇ m or less, the adhesion force representing the adhesion between the particle layers in the powder-filled layer to which moisture has been added increases, and thus the granulation property is greatly different. Therefore, 125 ⁇ m was set as the particle size section.
  • the purpose of the high-speed stirrer 12 is to break up agglomerates of fine powder, which are seeds of coarse granulated particles, before granulation in order to suppress the formation of coarse granulated particles. From the microscopic viewpoint, it is effective to exfoliate the fine powder directly by applying a shearing force to the aggregate itself in order to efficiently break the fine powder aggregate.
  • the high-speed stirrer 12 for example, an Eirich mixer (manufactured by Nihon Eirich), a Pelegaia mixer (manufactured by Kitagawa Tekko), a pro-shear mixer (Pacific Kiko) can be used.
  • the Eirich mixer is known as a “high-speed agitation granulation” machine, and is a facility that also has a granulation function accompanying the aggregation and growth of particles by liquid crosslinking.
  • the sintered raw material 11 that has been subjected to the pretreatment with the high-speed stirrer 12 is stirred and mixed by the drum mixer 13 with the addition of moisture, and granulated.
  • the sintered raw material 11 after granulation is supplied to a sintering machine 14 and becomes a sintered ore in the sintering machine 14.
  • the sintered ore is supplied to the blast furnace 15 as a blast furnace raw material together with coke and limestone to produce pig iron.
  • a high-speed stirring mixer (Eirich mixer) is used for the same sintered raw material containing 30 mass% of 125 ⁇ m fine iron ore.
  • a drum mixer were used for pretreatment before granulation.
  • the mixing time by each mixer is changed from 0 to 160 seconds, the particle size distribution is obtained for the sintered raw material after granulation for 160 seconds by the drum mixer after the pre-treatment, and based on that, Is defined by the following formula: , Ip, and the harmonic mean diameter Dp (mm), the particle size distribution function Isp, and the relative passing air volume of the packed bed before sintering are shown in FIG. 6, FIG. 7, and FIG.
  • an example in which the pre-processing by the drum mixer is 0 seconds is a conventional example.
  • the harmonic average diameter was increased by using it in a high-speed stirring mixer, and the effect of sharpening the particle size distribution by the particle size distribution function Isp was obtained.
  • the effect of increasing the relative airflow was also obtained.
  • the larger the relative passing air volume the larger the value, the higher the gas volume in the sintering machine operating at a constant negative pressure, and the higher the productivity.
  • U ⁇ t is a physical quantity having a dimension of “m” in length, and is considered to be a moving distance given by a blade rotating at high speed. Therefore, it can be arranged by different peripheral speeds and stirring times. It was.
  • the stirring time changes when the raw material occupancy in the apparatus is constant or the charging speed is changed. In that case, it turns out that the stable ore of stable quality can be manufactured by defining suitable range Uxt.
  • the relationship between the production rate (t / hr / m 2 ) and (U ⁇ t) when changed in the range is shown in FIG. 11 and Table 3 below.
  • the stirring of the high-speed stirring device when the peripheral speed U of the blade rotating at high speed of the high-speed stirring device is 9 (m / s), the stirring of the high-speed stirring device It can be seen that the time is preferably 30 seconds or more. Furthermore, from the result of FIG. 10, when the stirring time of the high-speed stirring device is 120 seconds, it is preferable that the peripheral speed U (m / s) of the blade rotating at high speed of the high-speed stirring device is 6 ⁇ U ⁇ 12. I understand that. Furthermore, from the result of FIG.
  • the stirring time is preferably 60 seconds or more.
  • a disk pelletizer can be used alone or in combination with a drum mixer, in addition to the drum mixer as a granulating apparatus in the above-described embodiments.
  • the raw material that has been treated with limestone it is preferable to coat the raw material that has been treated with limestone and to coat the surface of the granulated particles with a solid fuel.
  • the sintering raw material it is preferable to use one containing at least one kind of crystal water ore and a crystal water content of 4 mass% or more.
  • the reason why the content of crystallization water is preferably 4 mass% or more is because an ore having a high crystallization water has a high specific surface area and can improve the granulation property of fine ore.
  • it is preferable that 5 mass% or more of limestone is contained in the fine iron ore of 125 ⁇ m or less. It is preferable that 5 mass% or more of limestone is contained. By containing fine limestone, the mixing property of fine ore and limestone can be improved, and the sintering reaction can be promoted.
  • slaked lime or quicklime in addition to the lime content to be coated to the sintering raw material processed with a high-speed stirrer. It is preferable to add slaked lime or quicklime to 3 mass% or less because the addition of slaked lime or quicklime can improve the crushing strength of the granulated particles and improve the air permeability in the sintered raw material packed layer. . Furthermore, in the sintering raw material used for the high-speed stirrer, it is preferable that the sintering raw material is subjected to a drying treatment when the proportion of fine iron ore is 30 mass% or more. It is preferable to perform the drying process at 30 mass% or more because the moisture in the sintering process needs latent heat to evaporate, and the carbonaceous materials such as powdered coke can be reduced by drying in advance. It is.
  • high-quality sintered ore can be produced with high productivity using various sintering machines, and the sintered ore obtained in the present invention as a blast furnace raw material. By using this, it becomes possible to perform blast furnace operation with high productivity.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Glanulating (AREA)
PCT/JP2016/069840 2015-08-11 2016-07-05 焼結鉱の製造方法 WO2017026203A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201680044876.3A CN107849633B (zh) 2015-08-11 2016-07-05 烧结矿的制造方法
TR2018/01470T TR201801470T1 (tr) 2015-08-11 2016-07-05 Sinterli cevher üretim yöntemi.
KR1020187003837A KR102085054B1 (ko) 2015-08-11 2016-07-05 소결광의 제조 방법
PH12018550011A PH12018550011A1 (en) 2015-08-11 2018-02-09 Method for producing sintered ore

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-158659 2015-08-11
JP2015158659A JP6380762B2 (ja) 2015-08-11 2015-08-11 焼結鉱の製造方法

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KR (1) KR102085054B1 (ko)
CN (1) CN107849633B (ko)
PH (1) PH12018550011A1 (ko)
TR (1) TR201801470T1 (ko)
TW (1) TWI596213B (ko)
WO (1) WO2017026203A1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018194014A1 (ja) * 2017-04-17 2018-10-25 Ｊｆｅスチール株式会社 焼結鉱の製造方法
WO2023233871A1 (ja) * 2022-06-03 2023-12-07 Ｊｆｅスチール株式会社 焼結用造粒原料の製造方法および焼結鉱の製造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6489092B2 (ja) * 2016-09-28 2019-03-27 Ｊｆｅスチール株式会社 焼結鉱の製造方法および焼結鉱の製造設備列

Citations (8)

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Publication number Priority date Publication date Assignee Title
JPS52127402A (en) * 1976-04-19 1977-10-26 Ishikawajima Harima Heavy Ind Co Ltd Production of sintered ore
JPH0525556A (ja) * 1991-04-24 1993-02-02 Sumitomo Metal Ind Ltd 焼結鉱の製造方法
JPH08283876A (ja) * 1995-04-11 1996-10-29 Sumitomo Metal Ind Ltd 焼結鉱の製造方法
JPH10121153A (ja) * 1996-10-09 1998-05-12 Sumitomo Metal Ind Ltd 焼結原料の処理方法
JP2006291277A (ja) * 2005-04-08 2006-10-26 Jfe Steel Kk 焼結鉱の製造方法および焼結鉱製造用造粒設備
JP2014084468A (ja) * 2012-10-19 2014-05-12 Nisshin Steel Co Ltd 焼結原料の事前造粒方法
JP2014237888A (ja) * 2013-05-07 2014-12-18 新日鐵住金株式会社 焼結鉱の製造方法
JP2016079467A (ja) * 2014-10-17 2016-05-16 新日鐵住金株式会社 焼結鉱の製造方法

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JPH024658A (ja) 1988-06-09 1990-01-09 Ryoko Mimasaka 包装紙
JPH01312036A (ja) 1988-06-13 1989-12-15 Kawasaki Steel Corp 製鉄ダストと微粉鉄鉱石から焼結原料を製造する方法
JPH0621298A (ja) 1991-10-04 1994-01-28 Hitachi Ltd 成形金型
JPH0660358A (ja) 1991-10-11 1994-03-04 Tdk Corp 浮動型磁気ヘッド
JPH0621299A (ja) 1992-06-30 1994-01-28 Nippon Steel Corp 半導体製造装置
JPH0621297A (ja) 1992-07-03 1994-01-28 Dainippon Printing Co Ltd リードフレーム
JP2953308B2 (ja) 1994-06-06 1999-09-27 住友金属工業株式会社 焼結鉱の製造方法
JP4359995B2 (ja) 2000-03-07 2009-11-11 株式会社アドヴィックス 車両用ブレーキ装置
WO2005035803A1 (ja) * 2003-10-09 2005-04-21 Jfe Steel Corporation 焼結鉱の製造方法、焼結用原料の製造方法、造粒粒子、および焼結鉱
JP4356929B2 (ja) * 2003-12-08 2009-11-04 株式会社神戸製鋼所 焼結鉱の製造方法
CN201855730U (zh) * 2010-07-28 2011-06-08 鹤壁市绿色环保生产有限公司 双轴输送搅拌打击破碎机
JP6132114B2 (ja) * 2013-07-11 2017-05-24 Ｊｆｅスチール株式会社 焼結用造粒原料の製造方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127402A (en) * 1976-04-19 1977-10-26 Ishikawajima Harima Heavy Ind Co Ltd Production of sintered ore
JPH0525556A (ja) * 1991-04-24 1993-02-02 Sumitomo Metal Ind Ltd 焼結鉱の製造方法
JPH08283876A (ja) * 1995-04-11 1996-10-29 Sumitomo Metal Ind Ltd 焼結鉱の製造方法
JPH10121153A (ja) * 1996-10-09 1998-05-12 Sumitomo Metal Ind Ltd 焼結原料の処理方法
JP2006291277A (ja) * 2005-04-08 2006-10-26 Jfe Steel Kk 焼結鉱の製造方法および焼結鉱製造用造粒設備
JP2014084468A (ja) * 2012-10-19 2014-05-12 Nisshin Steel Co Ltd 焼結原料の事前造粒方法
JP2014237888A (ja) * 2013-05-07 2014-12-18 新日鐵住金株式会社 焼結鉱の製造方法
JP2016079467A (ja) * 2014-10-17 2016-05-16 新日鐵住金株式会社 焼結鉱の製造方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018194014A1 (ja) * 2017-04-17 2018-10-25 Ｊｆｅスチール株式会社 焼結鉱の製造方法
JP6458916B1 (ja) * 2017-04-17 2019-01-30 Ｊｆｅスチール株式会社 焼結鉱の製造方法
WO2023233871A1 (ja) * 2022-06-03 2023-12-07 Ｊｆｅスチール株式会社 焼結用造粒原料の製造方法および焼結鉱の製造方法

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TW201706417A (zh) 2017-02-16
CN107849633B (zh) 2019-09-03
KR102085054B1 (ko) 2020-03-05
JP2017036480A (ja) 2017-02-16
JP6380762B2 (ja) 2018-08-29
TWI596213B (zh) 2017-08-21
CN107849633A (zh) 2018-03-27
KR20180030596A (ko) 2018-03-23
PH12018550011A1 (en) 2018-07-09
TR201801470T1 (tr) 2018-05-21

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