WO2015005218A1 - 焼結用造粒原料の製造方法 - Google Patents

焼結用造粒原料の製造方法 Download PDF

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Publication number
WO2015005218A1
WO2015005218A1 PCT/JP2014/067797 JP2014067797W WO2015005218A1 WO 2015005218 A1 WO2015005218 A1 WO 2015005218A1 JP 2014067797 W JP2014067797 W JP 2014067797W WO 2015005218 A1 WO2015005218 A1 WO 2015005218A1
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WIPO (PCT)
Prior art keywords
raw material
sintering
iron ore
producing
granulated
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PCT/JP2014/067797
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English (en)
French (fr)
Japanese (ja)
Inventor
直幸 竹内
隆英 樋口
主代　晃一
山本　哲也
友司 岩見
大山　伸幸
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Ｊｆｅスチール株式会社
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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 JP2015526298A priority Critical patent/JP6132114B2/ja
Publication of WO2015005218A1 publication Critical patent/WO2015005218A1/ja
Priority to PH12016500041A priority patent/PH12016500041A1/en

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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

Definitions

  • the present invention relates to a method for producing a granulating raw material for sintering used in a DL type sintering machine.
  • 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.
  • Sintered blended raw material powdered with an appropriate amount of powdered coke and other solid fuel, mixed with water, granulated, and the resulting granulated raw material was charged into a sintering machine. Manufactured by firing.
  • 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 proposes a method of mixing fine powder (pellet feed) in advance 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
  • 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 8 there are the following problems.
  • FIG. 1 in these methods, not only fine particles (less than 0.5 mm) but also large (greater than 10 mm) pseudo particles are generated.
  • fine iron ore like pellet feed if the wettability is the same, the finer the specific surface area, the greater the specific surface area, so it is easy to absorb moisture and hold more moisture between the powders. It is because each fine iron ore becomes easy to absorb moisture preferentially.
  • 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 that when granulated iron ore is used as a raw material for the production of sintered ore, coarse granulated particles (pseudo particles) having irregular particle sizes and weak bond strength are generated during granulation.
  • the object is to propose a method to prevent and granulate proper pseudo particles.
  • the present invention is based on pseudo-particles having a relatively uniform particle size and a small particle size distribution, in which fine iron ore and fine particles are firmly aggregated, or in a structure in which fine iron ore or the like is adhered around the core particles.
  • the manufacturing method of the granulation raw material for sintering which becomes becomes 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 sintering.
  • the present invention produces sintered ore using such a granulating raw material for sintering, thereby improving the strength of sintered ore through improvement of combustion efficiency and melt generation conditions. It is possible to reduce the hot metal production cost and the amount of CO 2 generated from the blast furnace.
  • the present invention is based on powdered iron ore (sinter feed), which is a conventional general sintering raw material (average particle size: a particle size showing about 50 ⁇ m in cumulative frequency distribution is about 1000 ⁇ m or more).
  • powdered iron ore pellet feed
  • fine iron ore pellet feed
  • ultra fine iron ore tail ore having a particle size distribution of 10 ⁇ m or less are also used as one of the raw materials for sintering.
  • FIG. 4 is a comparative graph of the average particle diameter of such various iron ore powders.
  • the sintered blending raw material containing a difficult-to-granulate fine iron ore such as pellet feed, when this is granulated, the powder, fine powder, and ultrafine powder moisture.
  • coarse pseudo-particles having a weak bond strength tend to be preferentially aggregated with each other.
  • pseudo particles often have a large particle size distribution (a state in which the difference in particle size is large and uneven), and the sintering material charging (filling) layer on the pallet is shown during operation of the sintering machine. As shown in FIG. 3 (a), the particles in the charging layer of the sintering raw material are coarsely and finely packed densely or irregularly and deteriorate the air permeability.
  • pre-aggregation is performed using a high-speed agitator having a large agitating function to prevent preferential aggregation of fine and ultrafine iron ore.
  • the present invention relates to a method for producing a granulated raw material for sintering from a sintered blending raw material containing fine iron ore, and as the sintering blended raw material, 5-50 mass% pellet feed or fine iron ore that is tailing ore.
  • a method for producing a granulation raw material for sintering characterized by carrying out uniform dispersion treatment on stone and moisture, respectively, and stirring and mixing using at least one of a drum mixer and a pan-type pelletizer. According to this method, as shown in FIG. 3 (b), granulated particles of uniform size are filled, and a state in which voids are maintained can be maintained, which is advantageous for ensuring air permeability. is there.
  • the pellet feed is a fine iron ore having an average particle size of 40 ⁇ m to 100 ⁇ m
  • the tailing ore is a residue of fine iron ore having an average particle size of 10 ⁇ m or less
  • Sinter feed is fine iron ore having an average particle size of 1000 ⁇ m or more
  • the high-speed stirrer is a crushing Eirich mixer having a crushing function of raw materials and coarse grains that have grown.
  • the high-speed stirrer is installed before the drum mixer, or after the drum mixer and before the pan-type pelletizer, (5)
  • the crushing Eirich mixer has a stirring blade rotating at a high speed at a position eccentric in the radial direction with respect to the rotation center of the mixing pan, (6)
  • the rotation speed of the stirring blade is about 100 to 500 rpm, (7)
  • the auxiliary raw material powder is at least one selected from limestone, dolomite, silica, and serpentine, (8)
  • the miscellaneous raw material powder is any one or more selected from dust, scale, and return ore, (9)
  • the solid fuel powder is coke, Can be considered.
  • FIGS. 3 (a) and 3 (b) are schematic diagrams showing the structural characteristics of a pseudo particle deposition layer which is a granulation raw material for sintering.
  • Conventional pseudo-particles as shown in FIG. 3 (a) are obtained by the method as shown in FIG. 5 (a). That is, in the conventional granulated raw material manufacturing process for sintering, the iron ore powder and auxiliary raw material powder cut out from the mixing tank are first mixed in the drum mixer 1, and then the mixed raw material is mixed with the bread-type pelletizer 2 It is a method of carrying out granulation processing by feeding to a granulator such as the above.
  • the mixing step and the granulation step about 1 to 2 mass% of water is added, and the humidity is adjusted to obtain predetermined granulated moisture, thereby producing desired pseudo particles.
  • 3 of illustration is an exterior coke and the exterior drum mixer of an auxiliary material.
  • the present invention having a pseudo-particle structure as shown in FIG. 3 (b) replaces the conventional granulating raw material manufacturing process for sintering, which includes a mixing step by a drum mixer and a granulating step by a pan pelletizer.
  • the sintered blended raw material containing fine iron ore is first prepared by using a high-speed stirrer 4 such as an Eirich mixer.
  • the purpose is to include steps of uniform dispersion (diffusion) and uniform dispersion of water.
  • FIG. 5 (b) before the mixing step by the drum mixer 1, the sintered blended raw material containing fine iron ore is first prepared by using a high-speed stirrer 4 such as an Eirich mixer.
  • the purpose is to include steps of uniform dispersion (diffusion) and uniform dispersion of water.
  • the present invention uses a high-speed stirrer 4 such as an Eirich mixer after the mixing process by the drum mixer 1 and before the pelletizer 2 to uniformly disperse the fine iron ore ( Diffusion) and a process of uniformly dispersing moisture.
  • a high-speed stirrer 4 such as an Eirich mixer after the mixing process by the drum mixer 1 and before the pelletizer 2 to uniformly disperse the fine iron ore ( Diffusion) and a process of uniformly dispersing moisture.
  • the sintering blend contains a lot of the fine iron ore such as pellet feed and tailing ore (hereinafter referred to as fine fine iron ore including ultra fine tailing ore).
  • fine fine iron ore including ultra fine tailing ore the fine iron ore including ultra fine tailing ore.
  • raw materials agglomerates and coarse pseudo-particles, in which only fine raw materials are gathered, are unloaded from the ship, unloaded to the raw material yard, and betting, which is a mixed treatment of several types of powder and fine iron ore. It is known that it is inevitably formed.
  • the sintered blending raw material containing 5 mass% to 50 mass% of such fine iron ore is added before the stirring and mixing process in the drum mixer 1 as shown in FIG.
  • an appropriate amount of water is supplied to the fine iron ore by the high-speed stirrer (Eirich mixer 4) without excess or deficiency. Therefore, both of them were uniformly dispersed.
  • the reason is derived from the results of laboratory granulation tests described below. That is, at least before the final stage of the final granulation process, it is considered effective to uniformly disperse the sintered compounding raw material by uniform diffusion and addition of an appropriate amount of moisture according to the particle size and initial moisture.
  • 6 (a) and 6 (b) show the influence of air permeability due to the difference in the Eirich mixer installation position on the average diameter of each granulated particle.
  • the average particle size was about 4.3 mm and proper particles.
  • the Eirich mixer is installed after the drum mixer (but before the pan-type pelletizer)
  • the pulverization occurs after granulation, the sizing is promoted, but the average particle size is 4.25 mm. Slightly decreased.
  • the case (b) in which the Eirich mixer was arranged in front of the drum mixer gave better results.
  • the case (b) in which the Eirich mixer is arranged in front of the drum mixer has improved air permeability and the sintering reaction proceeds uniformly, so that the firing time is shortened and the productivity is improved. It became high.
  • the case (c) in which an Eirich mixer was installed after the drum mixer the sintered ore was produced using the granulation raw material for sintering obtained in this case. Although the average particle size of the particles became small, the air permeability was improved because the particle size distribution was improved, and the sintering reaction proceeded uniformly, so the firing time was shortened and the productivity was increased.
  • This Eirich mixer was used as a high-speed stirrer.
  • This Eirich mixer is known as a high-speed agitation granulator, and has a function of pulverizing and diffusing particles, particularly coarse particles, and a function of agglomeration of particles due to liquid crosslinking and agglomeration accompanying growth.
  • the high-speed stirrer suitable for the present invention has a plurality of stirrers at positions slightly deviated in the radial direction with respect to the rotation center of the mixing pan 5 (positions where coarse pseudo particles tend to stay, decentered in the clockwise direction).
  • the blades 6 are of a structure that is radially shifted in the vertical direction, and when the raw materials are efficiently stirred and mixed while preventing the rotation of the stirring blades and the raw materials, granulation is performed. Rather than the action, it enhances the crushing-diffusion action of the sintered compounding raw material and the produced particles.
  • uniform dispersion (diffusion) of fine iron ore itself uniform dispersion by effective supply of added moisture (sprinkling) according to the initial moisture and particle size distribution of raw materials, coarse grain crushing, Granulation can be achieved.
  • the speed of the stirring blade can be freely changed from a high speed that exhibits a high shearing force to a low speed at which granulation is performed by gentle stirring.
  • the present invention increases the stirring speed. Crushing of raw materials, strong agitation of fine iron ore (diffusion), supply of appropriate amount of water according to particle size and initial moisture value, that is, uniform diffusion of water, dispersion and mixing, partial grain growth (granulation)
  • a feature in the equipment configuration that encourages
  • Patent Documents 6 to 8 even when a high-speed stirrer is used, the humidity is adjusted without taking into consideration the appropriate moisture value at the time of high-speed stirring. Moisture increases, adhesion to the stirrer and blades increases, and the load current value increases. As a result, there is a problem in that the shearing force of the stirrer is reduced, leading to a reduction in the crushing force of the raw material, leading to deterioration of the particle size distribution.
  • the raw moisture content is monitored so that the initial moisture value of the combustion blended raw material charged into the high-speed stirrer can be constantly maintained at a level lower than the appropriate granulated moisture value (for example, about 7 mass%). If the initial moisture value of the raw material is close to the appropriate moisture, watering is stopped in the high-speed stirrer. It was to be.
  • the rotation speed of the stirring blade be 100 rpm to 500 rpm, preferably 150 rpm to 350 rpm. This is because a stirring effect or the like cannot be obtained at a slow speed of less than 100 rpm.
  • the rotation speed of the mixing pan 5 as the main body is operated at a constant speed of about 15 rpm in any case, and the number of the stirring blades 6 is about 8 to 32. Applies.
  • the mixing pan 5 is a rotating cylindrical flat container that moves the entire raw material, so that all the raw materials in the mixer are constantly flowing.
  • a scraper 7 is usually installed in the high-speed stirrer.
  • the scraper 7 is positioned above the mixing pan 5, and has a role of peeling off the raw material that is to remain on the inner wall or the bottom of the mixing pan 5 and continuously feeding the raw material to the stirring blade 6.
  • the raw material to be retained at the bottom is also peeled off by a bottom scraping chip (not shown) attached to the lowermost end of the stirring blade, but is preferably used together with the scraper 7.
  • This example was carried out by a method according to the equipment flow shown in FIG.
  • As sintering raw materials used in this example as the sinter feed, 50 mass% of Australian iron ore (average diameter 3.8 mm) and 50 mass% of South American iron ore (average diameter 2.7 mm) were used.
  • the above blending ratio (1: 1) of Australian iron ore and South American iron ore is transferred to these without changing. I responded.
  • tailing ore (residue generated in the process of producing pellet feed) was also used as part of the fine iron ore.
  • This sintering compound material was based on a basicity of 2.0.
  • the high-speed stirrer was installed in front of the drum mixer or in front of the pelletizer after the drum mixer, and the operation changed depending on the sintering raw materials and operating conditions, so external monitoring was strengthened.
  • the main purpose was to control the rotation speed of the stirring blades of the high-speed stirrer, and in addition, by adjusting the clearance with the bottom surface of the mixing pan, it was operated with the aim of uniform dispersion of the fine iron ore and pseudo particles to be stirred. . Therefore, in this embodiment, a thickness measuring device such as a laser displacement meter is also used. And the magnitude
  • An Eirich mixer was used as a high-speed stirrer.
  • the diameter of the mixing pan of the Eirich mixer used was 0.75 m, the number of rotations (counterclockwise) was 15 rpm, and the stirring blades (eccentric distance from the center of the pan: 115 mm) were the number of rotations: 250 rpm and the number of stirring blades: Eight were used.
  • the direction of rotation of the stirring blades was opposite to the direction of rotation of the mixing pan in order to prevent the raw material from rotating.
  • the clearance between the tip of the stirring blade and the inner bottom surface of the mixing pan was set to about 8 mm as a reference for efficiently crushing coarse particles having a particle diameter of 8 mm or more.
  • the pseudo particles were reliably crushed in any of the coarse particles having a particle diameter of 8 mm or more.
  • the obtained granulated pseudo particles had an average diameter of 4.3 mm, and a desired granulation raw material for sintering was obtained.
  • the production technique according to the present invention can be applied not only to the production of a granulation raw material for sintering but also to the production technique of agglomerated ore for blast furnace.

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PCT/JP2014/067797 2013-07-11 2014-07-03 焼結用造粒原料の製造方法 WO2015005218A1 (ja)

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JP2015526298A JP6132114B2 (ja) 2013-07-11 2014-07-03 焼結用造粒原料の製造方法
PH12016500041A PH12016500041A1 (en) 2013-07-11 2016-01-06 Method for producing raw granulation material for sintering

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017048419A (ja) * 2015-09-01 2017-03-09 株式会社日向製錬所 鉱石とダストからなる混練物の製造方法及びその方法を用いたブリケットの製造方法
CN110462070A (zh) * 2017-03-31 2019-11-15 杰富意钢铁株式会社 造粒烧结原料的制造方法及烧结矿的制造方法
CN111500857A (zh) * 2020-04-15 2020-08-07 山西太钢不锈钢股份有限公司 提高碱性球团矿生球团成球率的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6380762B2 (ja) * 2015-08-11 2018-08-29 Ｊｆｅスチール株式会社 焼結鉱の製造方法
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0797639A (ja) * 1993-08-06 1995-04-11 Sumitomo Metal Ind Ltd 焼結原料の造粒方法
JPH1161282A (ja) * 1997-08-18 1999-03-05 Nkk Corp 焼結鉱の製造方法
JP2006063350A (ja) * 2004-08-24 2006-03-09 Kobe Steel Ltd 焼結鉱の製造方法
JP2007191770A (ja) * 2006-01-20 2007-08-02 Kobe Steel Ltd 焼結鉱の製造方法
JP2011246766A (ja) * 2010-05-27 2011-12-08 Sumitomo Metal Ind Ltd 焼結原料の造粒方法
JP2012067348A (ja) * 2010-09-22 2012-04-05 Nippon Steel Corp 焼結用原料の事前処理方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1367141A4 (en) * 2001-02-22 2007-08-22 Nippon Steel Corp GRANULATION PROCESS FOR RAW MATERIAL FOR IRON PRODUCTION AND GRANULATION SUPPLEMENT FOR IRON PRODUCTION
JP5459655B2 (ja) * 2008-07-18 2014-04-02 Ｊｆｅスチール株式会社 尾鉱の処理方法
BR112012003786B1 (pt) * 2009-08-21 2021-11-16 Nippon Steel Corporation Aglomerado contendo carbono não queimado para altos fornos e seu processo de produção
JP5598439B2 (ja) * 2011-07-20 2014-10-01 新日鐵住金株式会社 焼結鉱の製造方法
JP5810836B2 (ja) * 2011-10-28 2015-11-11 新日鐵住金株式会社 焼結鉱製造用の改質炭材の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0797639A (ja) * 1993-08-06 1995-04-11 Sumitomo Metal Ind Ltd 焼結原料の造粒方法
JPH1161282A (ja) * 1997-08-18 1999-03-05 Nkk Corp 焼結鉱の製造方法
JP2006063350A (ja) * 2004-08-24 2006-03-09 Kobe Steel Ltd 焼結鉱の製造方法
JP2007191770A (ja) * 2006-01-20 2007-08-02 Kobe Steel Ltd 焼結鉱の製造方法
JP2011246766A (ja) * 2010-05-27 2011-12-08 Sumitomo Metal Ind Ltd 焼結原料の造粒方法
JP2012067348A (ja) * 2010-09-22 2012-04-05 Nippon Steel Corp 焼結用原料の事前処理方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017048419A (ja) * 2015-09-01 2017-03-09 株式会社日向製錬所 鉱石とダストからなる混練物の製造方法及びその方法を用いたブリケットの製造方法
CN110462070A (zh) * 2017-03-31 2019-11-15 杰富意钢铁株式会社 造粒烧结原料的制造方法及烧结矿的制造方法
CN111500857A (zh) * 2020-04-15 2020-08-07 山西太钢不锈钢股份有限公司 提高碱性球团矿生球团成球率的方法

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PH12016500041A1 (en) 2016-03-28

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