EP3043896A1 - Procédé et dispositif pour fabriquer des granulats - Google Patents

Procédé et dispositif pour fabriquer des granulats

Info

Publication number
EP3043896A1
EP3043896A1 EP14739733.5A EP14739733A EP3043896A1 EP 3043896 A1 EP3043896 A1 EP 3043896A1 EP 14739733 A EP14739733 A EP 14739733A EP 3043896 A1 EP3043896 A1 EP 3043896A1
Authority
EP
European Patent Office
Prior art keywords
granulator
granules
mixture
drum
mixing
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.)
Withdrawn
Application number
EP14739733.5A
Other languages
German (de)
English (en)
Inventor
Christoph Aichinger
Johann Reidetschlaeger
Stefan Hoetzinger
Karl Laaber
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.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria GmbH
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 Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP14739733.5A priority Critical patent/EP3043896A1/fr
Publication of EP3043896A1 publication Critical patent/EP3043896A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/008—Composition or distribution of the charge
    • 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
    • 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
    • B01J2/003—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic followed by coating of the granules
    • 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
    • B01J2/10—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in stationary drums or troughs, provided with kneading or mixing appliances
    • 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
    • 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
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to a process for the preparation of granules, wherein the preparation of the granules, the mixing of raw materials, especially iron ore, Feineisenerzkonzentrate, Koksgruß, limestone and optionally additives, with the addition of water to a mixture in an intensive mixer and granulating and rolling the mixture in a granulator or in a roller burnishing drum.
  • the invention relates to a device for carrying out the method according to the invention.
  • Layer ignited, after which forms a focal front.
  • the firing front is propelled by means of a gas, for example air, which is blown or sucked through the layer, and pervades the entire layer.
  • a gas for example air
  • a certain minimum permeability of the layer is required. This means that the layer on the rust or sintered tape a certain gas permeability may not fall below.
  • the permeability correlates with the coarse material fraction in the layer. The larger the coarse-grained material content, the higher the permeability and vice versa.
  • the permeability is also influenced by the geometric shape of the material contained in the sintering raw mixture.
  • a known measure for ensuring the minimum permeability of the layer is the introduction of the layer in the form of granules of a certain size, a certain geometric shape and a specific composition into the sintering plant.
  • fine particulate raw materials such as fine iron ore concentrates
  • fine particulate raw materials such as fine iron ore concentrates
  • steelworks dust or additives is desired.
  • the mixing and granulation of such fine-particulate raw materials is associated with the methods known from the prior art with considerable difficulties, since the finely particulate raw materials can be incorporated only limited in the granules. A considerable proportion of these fine-particulate raw materials remains fine particulate when using the known methods.
  • granules produced according to the prior art often have different particle sizes and / or an unfavorable geometric shape for the sintering process.
  • the object of the present invention is to provide a process for the production of granules in which the disadvantages known from the prior art are overcome.
  • Another object of the invention is the provision of a device for carrying out the method according to the invention.
  • Granulator and granulation of the mixture, and optionally of the additives, with addition of water to raw granules,
  • the raw materials especially iron ore, fine iron ore concentrates, coke saline, limestone and if appropriate, the additives, in particular sintered material, binders, binders, dust, steel mill residues are mixed in the intensive mixer.
  • the additives may also include dolomite, olivine and serpentine. Suitable binders are, for example, calcium oxide and / or calcium hydroxide.
  • intensive mixing of the raw materials initially results in a division and digestion of possibly existing raw material agglomerates.
  • a homogenization or a particularly uniform mixing of the raw materials takes place.
  • the resulting mixture may already contain the first micro-granules, which are the smallest aggregates of the raw materials, in which several smaller raw material particles adhere to individual larger raw material particles.
  • Iron ore is understood to mean iron oxide-containing material with a maximum particle size of 10 mm.
  • Fine iron ore concentrates iron oxide-containing material is to be understood with a maximum particle size of 200 ⁇ .
  • the fine iron ore concentrates in particular include iron oxide-containing pellet feed with a grain size of not more than 45 .mu.m.
  • Under sintered material is undersize and / or oversize of an iron oxide containing material to understand, which in a classification of the
  • the grain size of the sintered material is between 3mm and 8mm, preferably between 3mm and 5mm.
  • the maximum grain size of the limestone, as well as the grain size of the Koksgrußes at 5mm preferably 3mm.
  • the maximum grain size of the binder preferably calcium oxide or calcium hydroxide, is 3 mm, preferably 1 mm.
  • the maximum grain size of the dust is 1mm, while the maximum grain size of the steel mill residues is 8mm.
  • Steel mill wastes are iron-containing residues from a steelworks. Dust is preferably understood to mean iron-containing dust occurring in a steel mill, for example dust from a sinter plant, from a blast furnace or from a rolling mill, or iron-containing dust from corresponding assigned dedusting facilities.
  • the mixture is optionally introduced into the granulator together with at least one of the abovementioned additives. Thereafter, the granulation of the mixture, optionally together with at least one of the additives, with the addition of water to the raw granules. During granulation, smaller particles of the mixture remain adhered to already existing larger particles, the microgranules possibly already formed during intensive mixing, and thus form ever larger raw granules. By adding water, the moisture content of the mixture is adjusted and optimized for granulation.
  • the crude granules thus produced are introduced into the roller burnishing drum in the third process step, optionally together with at least one of the abovementioned additives. Rolling of the raw granules takes place in the rolling drum with the addition of water.
  • the addition of water optionally, in the
  • Rolling drum additionally coating the raw granules with calcium oxide and / or calcium hydroxide and / or the
  • Fine coke to the granules are the raw granules in the roller burnishing and / or prior to introduction into the
  • Rolling means rounding off and smoothing the surface of the raw granules by rubbing the raw granules together against each other.
  • the raw granules in the rolling drum are at least partially offset in rotation about their own axis.
  • the surface of the granules is smoothed and formed into a nearly ideal spherical shape.
  • a precisely defined grain size of the raw granules and, on the other hand, a precisely defined chemical composition of the surface layer of the raw granules are set.
  • the granules according to the invention are preferably used in a sintering plant.
  • the granules are introduced into the sintering plant as sintered mixture in the form of a layer.
  • the layer consisting of the granules according to the invention has a more homogeneous particle size distribution and thus a higher permeability compared to granules produced by the prior art.
  • the productivity of the sintering process is increased, whereby a reduction of various components of the sintering plant is possible.
  • finely particulate raw materials including, in particular, raw materials having a grain size of not more than 200 ⁇ m, can be processed well.
  • the addition of fuel for example coke, or the addition of a binder, for example calcium oxide or calcium hydroxide, can be reduced during the sintering process, since these substances are already present evenly distributed in the granules produced according to the invention or in their surface layer.
  • a binder for example calcium oxide or calcium hydroxide
  • intensive mixing of the mixture takes place in the intensive mixer for at least 30 seconds, preferably for at least 40 seconds and for a maximum of 90 seconds, preferably for a maximum of 60 seconds.
  • a further preferred embodiment of the method according to the invention is characterized in that the granulation of the mixture takes place in the granulator for at least 50 seconds, preferably for at least 60 seconds and for a maximum of 120 seconds, preferably for a maximum of 90 seconds.
  • the water content of the mixture has a lower limit of 3% by mass, preferably 4% by mass and an upper limit of 9% by mass, preferably 8% by mass, based on the total mass of the mixture.
  • a further subject of the invention is an apparatus for carrying out the method according to the invention, the apparatus comprising:
  • an intensive mixer for intensive mixing of raw materials, in particular iron ore, fine iron ore concentrates, coke breeze, limestone, and optionally additives, in particular sintered products, binders, dust, steel mill residues, with addition of water to a mixture, - one operatively linked to the intensive mixer
  • Granulator for granulating the mixture, and optionally additives, adding water to raw granules,
  • Rolling drum for rolling the raw granules - and optionally coating the raw granules with calcium oxide and / or calcium hydroxide and / or coke - to granules.
  • the intensive mixer is characterized in that it has a drive power, preferably between 1 kilowatt per 100 cubic decimetre mixture and 10 kilowatts per 100 cubic decimeter mixture.
  • the granulator is operatively connected to the intensive mixer on the input side.
  • operative means that the intensive mixer and the granulator are connected to one another in such a way that the mixture produced in the intensive mixer is transferred from the intensive mixer into the intensive mixer
  • Granulator can be introduced. For example, this is done by means of a first conveyor belt or a first
  • the granulator is operatively connected to the roller burnishing drum.
  • Operatively in this context means that the granulator and the roller burnishing drum are connected to one another such that the raw granules produced in the granulator can be introduced from the granulator into the roller burnishing drum. For example, this is done by means of a second conveyor belt or a second chute.
  • the intensive mixer is connected to the granulator by means of two or more conveyor belts or the granulator is connected to the roller burnishing drum by means of two or more conveyor belts.
  • the granules according to the invention are preferably used in a sintering plant.
  • the granules are introduced as sintering raw mixture in the form of a layer in the sinter plant.
  • the existing from the granules of the invention Layer has a higher permeability compared to granules produced by the prior art.
  • the productivity of the sintering process is increased, whereby a reduction of various components of the sintering plant is possible.
  • finely particulate raw materials can be well processed in contrast to the prior art.
  • the intensive mixer comprises a
  • the mixing drum axis and the mixing drum shaft are oriented perpendicular, then the mixing drum is rotatable about the mixing drum axis. If the mixing drum axis and the mixing drum shaft are oriented horizontally, then the mixing drum can not be rotated about the mixing drum axis.
  • Intensive mixing of the raw materials in the intensive mixer first results in a division and digestion of possibly existing raw material agglomerates. In addition, a homogenization or a particularly uniform mixing of the raw materials takes place.
  • the granulator comprises
  • a granulator drum having a granulator drum axis and at least one rotatable granulator drum shaft, - fixed to the granulator drum shaft, normal to
  • Granulator drum shaft oriented granulation, the granulator drum axis and the
  • Granulator drum shaft in the normal operating state of the granulator are vertically or horizontally oriented.
  • Granulator drum shaft oriented vertically, so is the
  • Granulator drum rotatable about the granulator drum axis. Are the granulator drum axis and the
  • Granulator drum shaft oriented horizontally, so is the
  • the roller burnishing drum is one
  • Roliertrommelachse rotatable wherein the roller burnishing drum axis is oriented horizontally in the normal operating state of the roller burnishing.
  • the number of tools in the intensive mixer is at least 7, preferably at least 9, and the
  • the granules produced by the method according to the invention are used in a sintering plant.
  • a sintering plant Preferably, the granules produced by the method according to the invention are used in a sintering plant.
  • FIG. 1 shows an example of a diagram of a method according to the invention and a device according to the invention.
  • FIG. 1 shows a representation of a method according to the invention and a device according to the invention for the production of granules 1.
  • the water content of the mixture 4 has a lower limit of 3 percent by mass, preferably 4 percent by mass and an upper limit of 9 percent by mass, preferably 8 percent by mass on the total mass of the mixture 4, on.
  • the intensive mixer 5 has a mixing drum 7 with a mixing drum axis 21 indicated by dashed lines in FIG. 1 and at least one rotatable mixing drum shaft 8. At the
  • Mixing drum shaft 8 are normal to the mixing drum axis 21 and the mixing drum shaft 8 oriented mixing tools 9 fixed, the mixing drum axis 21 and the
  • Mixing drum shaft 8 in the embodiment shown in FIG 1 are vertically oriented.
  • the mixing drum 7 is rotatable about the mixing drum axis 21.
  • the intensive mixer 5 find by intensive mixing of the raw materials 2, first a division and digestion of possibly existing raw material agglomerates instead. In addition, there is a homogenization or a particularly uniform
  • the intensive mixing of the mixture 4 in the intensive mixer 5 takes place for at least 30 seconds, preferably for at least 40 seconds and for a maximum of 90 seconds, preferably for a maximum of 60 seconds.
  • the intensive mixer 5 has a horrroudelessness of at least 7, preferably of at least 9.
  • Granulator 11 is carried out with the addition of water, a granulation of the mixture 4 to granules 12. By the addition of water 3, the moisture content of the mixture 4 is adjusted and optimized for granulation.
  • Granulator 11 has a granulator drum 13 with a dashed lines indicated in Figure 1 Granulatortrommelachse 20 and at least one rotatable granulator drum shaft 14. At the granulator drum shaft 14 are normal to
  • Granulator drum shaft 14 oriented granulating 15 fixed, the granulator drum axis 20 and the
  • Granulator drum shaft 14 in the embodiment shown in FIG 1 are vertically oriented.
  • the granulator drum 13 is rotatable about the granulator drum axis 20.
  • the granulation of the mixture 4 in the granulator 11 takes place for at least 50 seconds, preferably for at least 60 seconds and for a maximum of 120 seconds, preferably for a maximum of 90 seconds.
  • the granulator 11 has a horrroudelessness of at least 1, preferably of at least 5, on.
  • the raw granules 12 optionally together with at least one of the abovementioned additives 6 and fine coke, are introduced into a roller burnishing drum
  • the rolling drum 17 introduced.
  • the rolling drum 17 is carried out with the addition of water 3, a rolling and optionally coating the Raw granules 12 with calcium oxide and / or calcium hydroxide and / or the fine coke to the granules 1.
  • the rolling drum 17 is rotatable about a rolling drum axis 18, wherein the rolling drum axis 18 is oriented horizontally.
  • the intensive mixer 5, the granulator 11, the rolling drum 17 and the conveyor belts 10,16 include
  • the invention relates to a process for the preparation of granules 1, the process comprising the following process steps:
  • raw materials 2 in particular iron ore, fine iron ore concentrates, coke breeze, limestone and optionally additional substances 6, in particular sintered products, binders,
  • a third step introducing the raw granules 12, water 3 and optionally of additives 6 and fine coke in a roller drum 17 and rolling and optionally coating the raw granules 12 with calcium oxide and / or calcium hydroxide and / or the fine coke to the granules.
  • the granules 1 according to the invention are used in the sintering plant 19.
  • the granules 1 are introduced as a sintering raw mixture in the form of a layer in the sinter plant 19.
  • the layer consisting of the granules 1 according to the invention has, in comparison to the prior art. provided granules a more homogeneous particle size distribution and thus a higher permeability. As a result, the productivity of the sintering process is increased, whereby a reduction of various components of the sintering plant 19 is possible.
  • fine-particle raw materials 2 can also be well processed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Glanulating (AREA)

Abstract

L'invention concerne un procédé et un dispositif de fabrication de granulats (1) qui sont obtenus par une combinaison des opérations suivantes: mélanger intensément des matières premières (2) et des additifs (6) éventuels sous addition d'eau (3) pour former un mélange (4), introduire le mélange (4) et des additifs (6) éventuels dans un granulateur (11) et granuler le mélange (4) sous addition d'eau (3) pour former des granulats bruts (12), introduire les granulats bruts (12), l'eau (3) et les additifs (6) éventuels dans un tambour à rouler (17) et faire rouler les granulats bruts (12) les uns contre les autres pour obtenir lesdits granulats (1).
EP14739733.5A 2013-09-11 2014-07-07 Procédé et dispositif pour fabriquer des granulats Withdrawn EP3043896A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14739733.5A EP3043896A1 (fr) 2013-09-11 2014-07-07 Procédé et dispositif pour fabriquer des granulats

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13183890.6A EP2848299B1 (fr) 2013-09-11 2013-09-11 Procédé et dispositif destinés à la fabrication de granulés
PCT/EP2014/064431 WO2015036139A1 (fr) 2013-09-11 2014-07-07 Procédé et dispositif pour fabriquer des granulats
EP14739733.5A EP3043896A1 (fr) 2013-09-11 2014-07-07 Procédé et dispositif pour fabriquer des granulats

Publications (1)

Publication Number Publication Date
EP3043896A1 true EP3043896A1 (fr) 2016-07-20

Family

ID=49150819

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13183890.6A Active EP2848299B1 (fr) 2013-09-11 2013-09-11 Procédé et dispositif destinés à la fabrication de granulés
EP14739733.5A Withdrawn EP3043896A1 (fr) 2013-09-11 2014-07-07 Procédé et dispositif pour fabriquer des granulats

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP13183890.6A Active EP2848299B1 (fr) 2013-09-11 2013-09-11 Procédé et dispositif destinés à la fabrication de granulés

Country Status (15)

Country Link
US (1) US10155996B2 (fr)
EP (2) EP2848299B1 (fr)
JP (1) JP6333982B2 (fr)
KR (1) KR102217869B1 (fr)
CN (1) CN105592918A (fr)
AR (1) AR097626A1 (fr)
AU (1) AU2014320758A1 (fr)
BR (1) BR112016004992B1 (fr)
CA (1) CA2923785A1 (fr)
MX (1) MX2016003070A (fr)
RU (1) RU2675883C2 (fr)
TW (1) TWI655983B (fr)
UA (1) UA118452C2 (fr)
WO (1) WO2015036139A1 (fr)
ZA (1) ZA201601296B (fr)

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KR101696328B1 (ko) * 2015-10-23 2017-01-13 주식회사 포스코 원료 처리 장치, 원료 처리 방법 및 이를 이용하여 제조된 조립물
CN106609324B (zh) * 2016-01-28 2018-05-18 安徽工业大学 一种抑制corex竖炉内球团黏结的方法
CN110788338A (zh) * 2019-11-27 2020-02-14 安徽省春谷3D打印智能装备产业技术研究院有限公司 一种滚筒式低熔点金属粉末的球化装置及工艺
EP3904544A1 (fr) 2020-04-30 2021-11-03 Primetals Technologies Austria GmbH Procédé de réglage d'une perméabilité d'un produit fritté
CN116393687A (zh) * 2023-05-29 2023-07-07 临沂玫德庚辰金属材料有限公司 一种新能源电池用超细雾化铁粉生产装置及方法

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KR101375061B1 (ko) * 2010-10-08 2014-03-17 신닛테츠스미킨 카부시키카이샤 철광석 원료의 조립물의 제조 방법 및 철광석 원료의 조립물
JP5730534B2 (ja) * 2010-10-29 2015-06-10 Ｊｆｅスチール株式会社 製鉄スラッジ等を主原料とする造粒物の製造方法

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UA118452C2 (uk) 2019-01-25
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US20160222478A1 (en) 2016-08-04
EP2848299B1 (fr) 2019-08-14
ZA201601296B (en) 2017-05-31
BR112016004992B1 (pt) 2021-01-05
AU2014320758A1 (en) 2016-03-24
WO2015036139A1 (fr) 2015-03-19
RU2016113293A (ru) 2017-10-16
CN105592918A (zh) 2016-05-18
JP2016531207A (ja) 2016-10-06
AR097626A1 (es) 2016-04-06
MX2016003070A (es) 2016-05-31
CA2923785A1 (fr) 2015-03-19
TWI655983B (zh) 2019-04-11
US10155996B2 (en) 2018-12-18
TW201527015A (zh) 2015-07-16
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EP2848299A1 (fr) 2015-03-18

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