EP2438203B1 - Procédé de préparation d'agglomérats à partir de matières granulaires fines d' oxydes de métaux pour charge de haut-fourneau - Google Patents

Procédé de préparation d'agglomérats à partir de matières granulaires fines d' oxydes de métaux pour charge de haut-fourneau Download PDF

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Publication number
EP2438203B1
EP2438203B1 EP10722706.8A EP10722706A EP2438203B1 EP 2438203 B1 EP2438203 B1 EP 2438203B1 EP 10722706 A EP10722706 A EP 10722706A EP 2438203 B1 EP2438203 B1 EP 2438203B1
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Prior art keywords
mineral
raw material
fine
binder
lime
Prior art date
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EP10722706.8A
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German (de)
English (en)
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EP2438203A1 (fr
Inventor
Theo GÜNTHER
Matthias BLÖSER
Denise Alfenas Moreira
Arnd Pickbrenner
Christopher Pust
Wolfgang RÜCKERT
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Rheinkalk GmbH
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Rheinkalk GmbH
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Priority to PL10722706T priority Critical patent/PL2438203T3/pl
Publication of EP2438203A1 publication Critical patent/EP2438203A1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • 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
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • 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
    • 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
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • C22B1/205—Sintering; Agglomerating in sintering machines with movable grates regulation of the sintering process
    • 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
    • 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
    • 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

Definitions

  • an aggregate for the production of autoclave-hardened building materials which has a mineral filler with a silica content of at least 60 wt.%, Preferably 75 wt.% And a Feinstkornanteil of less than 2 ⁇ m of at least 40 wt.% Of the aggregate.
  • RU 2 241 770 C1 describes a mixture of iron ore comprising 10 to 30 wt% of a fine sand fraction having a grain size of 0.25 to 0.074 mm and 70 to 90% of a clay mineral fraction having a particle size of less than 0.074 mm.
  • the composition is used for the production of iron ore pellets and has a high strength.
  • GB 805 938 A describes a method for sintering residues from metalworking using lime and clay minerals as binders.
  • Example 2 describes the sintering of an ore using clay mineral as a binder as well as lime. As clay mineral bentonite can be used.
  • GB 825 440 A describes a process for briquetting ores in which a binder is added to the finely divided ore.
  • the binder consists of a finely divided clay / glue mixture. Subsequently, a pressing operation is performed.
  • JP 2002 285251 A describes a method for improving the permeability of a sintered layer and increasing productivity in the production of a sintered ore, in which a clay mineral compound is added to the sintered raw product and the mixture is sintered in a conventional manner.
  • JP 2005 097687 A describes microparticles which are mixed with a raw material to be sintered for the production of iron and granulated.
  • ore containing ore sizes metal and / or metal oxide-containing fines having a mean grain diameter of less than 1 mm, preferably from 0.05 mm to 1 mm, more preferably from 0.2 to 0.7 mm, in particular of 0.1 to 0.5 mm understood.
  • An essential process step of the method according to the invention is the use of a lime-based material together with a clay mineral-containing raw material as a binder.
  • the lean clay has, which consists of at least 60 wt.% Fine quartz and 20 to 40 wt.% Kaolinit and optionally subordinate micas.
  • Excellent is a clay mineral-containing raw material, the 70 to 90 wt.%, Preferably about 83 wt.% Of silica, 5 to 20 wt.%, Preferably about 13 wt.% Of alumina, 0.2 to 1.5 wt.%, Preferably about 0.7 wt% Fe 2 O 3 and 0.1 to 1 wt%, preferably about 0.4 wt% potassium oxide.
  • the clay mineral-containing raw material with a substantially continuous particle size distribution.
  • the metal and / or metal oxide-containing fines and the mineral binder are mixed together.
  • the mixing of fines and binders can be carried out in a variety of ways known to those skilled in the art.
  • the mixing of fines and binders in a mixing unit is particularly simple.
  • metal and / or metal oxide-containing fines the most diverse fines can be used.
  • the term "metal and / or metal oxide-containing fines" are understood according to the invention as powdery to finer materials. These preferably have average particle sizes of 0.01 to 10 mm. The use of materials having average particle sizes of from 0.05 to 3 mm, in particular from 0.1 to 2 mm, has proven particularly suitable. Preferably, up to 50 wt.% Of the particle sizes of the fine material in the grain size range between 0.1 and 2 mm.
  • the binder contains a lime-based material.
  • Lime, limestone, quicklime, slaked lime, hydrated lime, dolomite, dolomitic lime, dolomitic lime, dolomitic lime hydrate and mixtures thereof are particularly suitable according to the invention.
  • offset additives for lowering the hardening temperature such as, for example, low-melting silicatic substances, in particular a glass powder and / or phonolite, can be added to the mixture.
  • agglomerates produced by a sintering process have proven to be particularly suitable.
  • the advantages of sintering include the fact that the agglomerates can be pre-reduced and losses in the furnace can be avoided.
  • the course of the sintering process is known to the person skilled in the art and may, for example, be as follows. It is first produced a mix containing fine ores, recycling substances, fuel, especially coke breeze, mineral binder and Sintereigenabsiebung. This mix is mixed with water and layered on a sintered belt. The fuel contained in the mixture is ignited, for example, by natural gas and / or blast gas flames. The induced draft fan located under the sintering belt now pulls the firing front through the mixture, so that the sinter cake is completely burnt out at the discharge of the belt. Due to the heat generated in the process, the fine ores melt superficially so that their grains form a firm connection. After breaking the sinter cake, it is cooled and classified. So-called grate and sintered material can remain in the sintering plant. The finished sinter is fed to the blast furnace.
  • the sintered material produced by the process according to the invention is outstandingly suitable for use as a blast furnace feedstock.
  • the invention further relates to a blast furnace feed which can be prepared by the process according to the invention.
  • the premix contains 50 to 99 wt.%, Preferably 60 to 90 wt.%, In particular 70 to 85 wt.% Of metal and / or metal oxide-containing fines and 1 to 20 wt.%, Preferably 1 to 15% by weight, conventional additives and mineral binder.
  • the mineral binder comprises 30 to 98% by weight lime-based material and 2 to 70% by weight, preferably 10 to 60% by weight, of mineral raw material.
  • the premix contains from 0 to 30% by weight of additives, preferably coke breeze, pan breakout and / or slags.
  • Another object of the invention is a premix for the production of the blast furnace feedstock according to the invention comprising a metal and / or metal oxide-containing fines and a mineral binder comprising a mineral raw material and a kalkstämmiges material, wherein as a mineral raw material a clay mineral-containing raw material is used, which is a silicon oxide Content of at least 40% by weight, and having a fines content of less than 4 ⁇ m of at least 20% by weight and a particle size fraction of less than 1 ⁇ m of at least 10% by weight.
  • a clay mineral-containing raw material which is a silicon oxide Content of at least 40% by weight, and having a fines content of less than 4 ⁇ m of at least 20% by weight and a particle size fraction of less than 1 ⁇ m of at least 10% by weight.
  • Mix 1, 2, 3, 3a, 3b there are five different Sinterbandmischungen (mix 1, 2, 3, 3a, 3b) produced.
  • the mixed material 3a and 3b fine material, which has a defined proportion of intermediate grain sizes, mixed with the respective binder and conventional sintering aids and adjusted the mass moisture.
  • a mineral raw material is used as a binder having a silica content of at least 40 wt.%, And a Feinstkornanteil of less than 4 microns of at least 20 wt.% And a particle size fraction of less than 1 micron of at least 10 % By weight.
  • the mix 1, 2 and 3 is prepared without the addition of binder. Subsequently, the mix is mixed with water and layered on a sintered belt.
  • the mix has a specific Gas sheströmiana, which can be measured by the pressure loss of a compressed air flow through the mixture. A low pressure loss indicates good gas flowability. A good Gas sheströmiana is desirable in the sintering process, since it leads to a good burn through of the sinter cake.
  • the following table illustrates the pressure losses for the mix 1, 2, 3, 3a, 3b.
  • a comparison of the mix 1, 2, 3 reveals that an increase in the proportion of inter-grain sizes leads to an increase in the pressure loss and to a reduction in Gas millströmhus.
  • a comparison of the mixed material 3, 3a shows that improved gas flowability can be achieved by the addition of CaO as binder.

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

Claims (22)

  1. Procédé de fabrication d'un aggloméré qui est utilisé en tant que charge pour un haut-fourneau, par mélange de fines contenant un métal et/ou un oxyde métallique, d'un liant minéral, qui comprend une matière brute minérale et un matériau dérivé de la chaux, et, le cas échéant, d'additifs usuels pour former une matière et solidification de la dite matière pour former un aggloméré par un processus de frittage, caractérisé en ce que la matière brute minérale utilisée est une matière brute contenant du minéral argileux comprenant une proportion d'oxyde de silicium d'au moins 40 % en poids et une proportion de grains à très fine granulométrie, inférieure à 4 µm, d'au moins 20 % en poids, ainsi qu'une proportion de grains ayant une granulométrie inférieure à 1 µm d'au moins 10 % en poids.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on utilise une matière brute minérale qui comprend de l'argile maigre qui est constituée d'au moins 60 % en poids de quartz fin et de 20 à 40 % en poids de kaolinite et, le cas échéant, de micas secondaires.
  3. Procédé selon une des revendications de 1 à 2, caractérisé en ce que l'on utilise une matière brute minérale qui comprend de 70 à 90 % en poids, de préférence environ 83 % en poids, d'oxyde de silicium, de 5 à 20 % en poids, de préférence environ 13 % en poids, d'oxyde d'aluminium, de 0,2 à 1,5 % en poids, de préférence environ 0,7 % en poids, de Fe2O3, et de 0,1 à 1 % en poids, de préférence environ 0,4 % en poids, d'oxyde de potassium.
  4. Procédé selon une des revendications de 1 à 3, caractérisé en ce que le mélange des fines et du liant a lieu dans un mélangeur.
  5. Procédé selon une des revendications de 1 à 4, caractérisé en ce que les fines contenant un métal et/ou un oxyde métallique et le liant minéral sont mélangés l'un à l'autre dans une proportion allant de 5 sur 1 à 1 000 sur 1.
  6. Procédé selon une des revendications de 1 à 5, caractérisé en ce que l'humidité massique lors du mélange des fines et du liant est ajustée sur une valeur allant de 2 à 20 % en poids.
  7. Procédé selon une des revendications de 1 à 6, caractérisé en ce que l'on utilise, en tant que matériau dérivé de la chaux, de la chaux, du calcaire, de la chaux vive, de la chaux éteinte, de la chaux hydratée, de la dolomite, de la chaux dolomitique, de la chaux vive dolomitique et/ou de la chaux dolomitique hydratée.
  8. Procédé selon une des revendications de 1 à 7, caractérisé en ce que l'on utilise, en tant que fines contenant un métal et/ou ou oxyde métallique, des fines de minerai, notamment des fines de minerai de fer, des matériaux à base des scories, notamment des scories de laminoir, des poussières de gueulard, des retours issus du traitement de frittage, des poussières de ponçage métalliques et/ou des copeaux métalliques.
  9. Procédé selon une des revendications de 1 à 8, caractérisé en ce que l'on utilise des fines contenant un métal et/ou un oxyde métallique qui présentent une proportion de grains à granulométrie de taille intermédiaire de plus de 30 % en poids.
  10. Procédé selon une des revendications de 1 à 9, caractérisé en ce que des additifs de frittage usuels, notamment du poussier de coke, des éclats de tuiles et/ou des scories sont ajoutés au mélange des fines et du liant.
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que le processus de frittage comprend les étapes suivantes :
    - le mélange des fines, du liant minéral, d'eau, des matériaux de circulation de haut-fourneau usuels et d'un combustible pour former un mélange ;
    - le traitement thermique du mélange à une température inférieure à la température de fusion du mélange, lors duquel un aggloméré se forme en forme d'un gâteau de frittage.
  12. Procédé selon la revendication 11, caractérisé en ce que le gâteau de frittage est brisé, un aggloméré étant obtenu en forme de frittage définitif.
  13. Procédé selon une des revendications de 1 à 12, caractérisé en ce que l'on utilise des fines contenant des proportions de grains ayant une granulométrie inférieure à 2 mm, de préférence de 0,05 mm à 1 mm, en une quantité d'au moins 30 % en poids.
  14. Charge pour haut-fourneau fabriquée par un procédé selon une ou plusieurs des revendications de 1 à 13.
  15. Prémélange pour la fabrication d'une charge pour haut-fourneau selon la revendication 14, comprenant des fines contenant un métal et/ou un oxyde métallique et un liant minéral qui comprend une matière brute contenant du minéral argileux et un matériau dérivé de la chaux, caractérisé en ce que les fines contenant un métal et/ou un oxyde métallique présentent une proportion de fines d'un diamètre de grains moyen inférieur à 1 mm supérieure à 30 % en poids.
  16. Prémélange selon la revendication 15, caractérisé en ce que le prémélange contient de 50 à 99 % en poids de fines contenant un métal et/ou un oxyde métallique et de 1 à 20 % en poids d'additifs usuels et de liant minéral.
  17. Prémélange selon la revendication 15 ou 16, caractérisé en ce que le liant minéral comprend de 30 à 98 % en poids de matériaux dérivés de la chaux et de 2 à 70 % en poids de matière brute minérale.
  18. Prémélange selon une des revendications de 15 à 17, caractérisé en ce que le prémélange contient de 0 à 30 % en poids d'additifs, de préférence de possier de coke, d'éclats de tuiles et/ou de scories.
  19. Prémélange selon une des revendications de 15 à 18, caractérisé en ce que la matière brute minérale présente une proportion d'oxyde de silicium d'au moins 60 % en poids, de préférence d'au moins 75 % en poids, et une proportion de grains à très fine granulométrie, inférieure à 2 µm, d'au moins 40 % en poids, où la proportion de grains à granulométrie inférieure à 0,5 µm est d'au moins 25 % en poids.
  20. Prémélange selon une des revendications de 15 à 19, caractérisé en ce que la matière brute minérale contient de l'argile maigre qui est constituée d'au moins 60 % en poids de quartz fin et de 20 à 40 % en poids de kaolinite et, le cas échéant, de micas secondaires.
  21. Prémélange selon une des revendications 15 à 19, caractérisé en ce que la matière brute minérale comprend de 70 à 90 % en poids, de préférence environ 83 % en poids, d'oxyde de silicium, de 5 à 20 % en poids, de préférence environ 13 % en poids, d'oxyde d'aluminium, de 0,2 à 1,5 % en poids, de préférence environ 0,7 % en poids, de Fe2O3, et de 0,1 à 1 % en poids, de préférence environ 0,4 % en poids, d'oxyde de potassium.
  22. Utilisation d'un mélange contenant un liant minéral qui comprend une matière brute contenant du minéral argileux et un matériau dérivé de la chaux, et, le cas échéant, des additifs usuels pour la fabrication d'un aggloméré qui est solidifié par une processus de frittage et qui est utilisé en tant que charge pour haut-fourneau, caractérisée en ce que l'on utilise, en tant que matière brute minérale, une matière brute qui présente une proportion d'oxyde de silicium d'au moins 40 % en poids et une proportion de grains à très fine granulométrie, inférieure à 4 µm, d'au moins 20 % en poids et une proportion de grains à granulométrie inférieure à 1 µm d'au moins 10 % en poids.
EP10722706.8A 2009-06-04 2010-06-04 Procédé de préparation d'agglomérats à partir de matières granulaires fines d' oxydes de métaux pour charge de haut-fourneau Active EP2438203B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10722706T PL2438203T3 (pl) 2009-06-04 2010-06-04 Sposób wytwarzania aglomeratu z drobnego materiału zawierającego tlenek metalu do zastosowania jako materiał wsadowy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009023928A DE102009023928A1 (de) 2009-06-04 2009-06-04 Verfahren zur Herstellung eines Agglomerats
PCT/EP2010/057842 WO2010139789A1 (fr) 2009-06-04 2010-06-04 Procédé de préparation d'un aggloméré à partir de fines contenant des oxydes métalliques, destiné à être utilisé en tant que charge pour haut-fourneau

Publications (2)

Publication Number Publication Date
EP2438203A1 EP2438203A1 (fr) 2012-04-11
EP2438203B1 true EP2438203B1 (fr) 2015-02-25

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US (2) US9175363B2 (fr)
EP (1) EP2438203B1 (fr)
JP (1) JP5762403B2 (fr)
KR (1) KR101798162B1 (fr)
CN (1) CN102459658B (fr)
AU (1) AU2010255697B2 (fr)
BR (1) BRPI1010034B1 (fr)
CA (1) CA2764535A1 (fr)
CL (1) CL2011003071A1 (fr)
DE (1) DE102009023928A1 (fr)
EA (1) EA023830B1 (fr)
ES (1) ES2537209T3 (fr)
MX (1) MX2011012939A (fr)
PL (1) PL2438203T3 (fr)
RS (1) RS54006B1 (fr)
UA (1) UA103533C2 (fr)
WO (1) WO2010139789A1 (fr)
ZA (1) ZA201108924B (fr)

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DE102009023928A1 (de) 2009-06-04 2010-12-09 Rheinkalk Gmbh Verfahren zur Herstellung eines Agglomerats
BRPI1104742A2 (pt) * 2011-09-05 2013-08-13 Vale Sa mÉtodo de inibiÇço do envelhecimento (intemperismo) de pelotas de minÉrio de ferro durante estocagem
KR101291403B1 (ko) * 2012-09-05 2013-07-30 한호재 광석화 펠릿, 이의 제조방법, 첨가제 펠릿 및 이를 이용한 선철의 제조방법
US9228246B2 (en) 2013-01-11 2016-01-05 Alternative Charge Materials, Llc Method of agglomerating silicon/silicon carbide from wiresawing waste
CZ2013531A3 (cs) * 2013-07-08 2015-02-04 Ecofer, S.R.O. Tavidlo pro aglomeraci, způsob výroby tavidla, aglomerační směs pro výrobu aglomerátu a použití strusek sekundární metalurgie jako tavidel pro přípravu aglomerační směsi
EP2848299B1 (fr) * 2013-09-11 2019-08-14 Primetals Technologies Austria GmbH Procédé et dispositif destinés à la fabrication de granulés
CN111733320A (zh) * 2020-07-29 2020-10-02 攀钢集团研究院有限公司 改善烧结混合料粒度的制粒方法

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AU2010255697B2 (en) 2015-12-03
KR20120037447A (ko) 2012-04-19
DE102009023928A1 (de) 2010-12-09
WO2010139789A1 (fr) 2010-12-09
BRPI1010034A2 (pt) 2020-08-18
JP2012528941A (ja) 2012-11-15
BRPI1010034B1 (pt) 2021-04-06
ES2537209T3 (es) 2015-06-03
CA2764535A1 (fr) 2010-12-09
RS54006B1 (en) 2015-10-30
US9175363B2 (en) 2015-11-03
EP2438203A1 (fr) 2012-04-11
AU2010255697A1 (en) 2012-01-19
EA023830B1 (ru) 2016-07-29
JP5762403B2 (ja) 2015-08-12
CN102459658A (zh) 2012-05-16
CL2011003071A1 (es) 2012-05-04
MX2011012939A (es) 2012-04-02
KR101798162B1 (ko) 2017-11-15
PL2438203T3 (pl) 2015-07-31
ZA201108924B (en) 2012-08-29
US20120180599A1 (en) 2012-07-19
EA201101700A8 (ru) 2014-05-30
EA201101700A1 (ru) 2012-07-30
CN102459658B (zh) 2015-12-16
UA103533C2 (ru) 2013-10-25
US20160083809A1 (en) 2016-03-24

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