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WO2009066004A1 - Procédé pour introduire dans un four de fusion des écoulements de matière provenant d'un four de préchauffage, et système de préchauffage - Google Patents

Procédé pour introduire dans un four de fusion des écoulements de matière provenant d'un four de préchauffage, et système de préchauffage Download PDF

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Publication number
WO2009066004A1
WO2009066004A1 PCT/FI2008/050654 FI2008050654W WO2009066004A1 WO 2009066004 A1 WO2009066004 A1 WO 2009066004A1 FI 2008050654 W FI2008050654 W FI 2008050654W WO 2009066004 A1 WO2009066004 A1 WO 2009066004A1
Authority
WO
WIPO (PCT)
Prior art keywords
sub
furnace
silo
smelting furnace
preheating
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.)
Ceased
Application number
PCT/FI2008/050654
Other languages
English (en)
Inventor
Janne Ollila
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.)
Metso Corp
Original Assignee
Outotec Oyj
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 Outotec Oyj filed Critical Outotec Oyj
Priority to CN2008801169734A priority Critical patent/CN101878407B/zh
Priority to BRPI0820318-0A priority patent/BRPI0820318A2/pt
Priority to EA201000655A priority patent/EA019835B1/ru
Publication of WO2009066004A1 publication Critical patent/WO2009066004A1/fr
Priority to ZA2010/03205A priority patent/ZA201003205B/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B19/00—Combinations of different kinds of furnaces that are not all covered by any single one of main groups F27B1/00 - F27B17/00
    • F27B19/04—Combinations of different kinds of furnaces that are not all covered by any single one of main groups F27B1/00 - F27B17/00 arranged for associated working
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • F27B3/045—Multiple chambers, e.g. one of which is used for charging

Definitions

  • the invention relates to a method defined in the preamble of claim 1.
  • the invention also relates to a preheating system defined in the preamble of claim 3.
  • the material to be heated is fed in batches through a feed silo, by means of a distributor device, to the preheating furnace, where the material is heated by a hot gas flow.
  • a hot gas flow typically the hot gas mixture is fed into the preheating furnace through the bottom part thereof, so that it is distributed evenly inside the material bed.
  • the preheating furnace is connected to the smelting furnace in a known fashion by separate pipe arrangements that extend through the ceiling of the smelting furnace to the interior of the electric smelting furnace, thus feeding the preheated material for smelting.
  • Various preheating furnace arrangements are described for example in the publications FI 842577 A, FI 105236 B and FI 71088 B.
  • a preheating furnace including at least two sub-silos.
  • the sub-silos include a first sub-silo having a first outlet pipe for conducting the material to a first inlet conduit of the smelting furnace, which inlet conduit is located in the upper part of the smelting furnace, at a distance from the furnace center.
  • the preheating furnace includes a second sub-silo provided with a second outlet pipe for conducting the material to a second inlet conduit of the smelting furnace, which inlet conduit is located in the upper part of the smelting furnace, in the vicinity of the furnace center.
  • the material is heated and flows then downwards to a first outlet pipe and respectively to a second outlet pipe, when essentially the same amount of thermal energy, in relation to the volume flow discharged from said silo, is conducted to each sub-silo.
  • the first flow of preheated material is conducted from the first sub-silo along a first outlet pipe to a first inlet conduit of the smelting furnace with a first volume flow, which is defined from the downward-flowing rate of the material at said point of the smelting furnace.
  • a second flow of preheated material is conducted from the second sub-silo along a second outlet pipe to a second inlet conduit of the smelting furnace with a second volume flow, which is defined from the downward-flowing rate of the material at said point of the smelting furnace, said second volume flow being larger than the first volume flow.
  • the known preheating system includes a preheating furnace provided with at least two sub- silos, a first sub-silo having a first outlet pipe for conducting the material to the first inlet conduit of the smelting furnace, said first inlet conduit being located in the upper part of the smelting furnace, at a distance from the furnace center.
  • the preheating furnace has a second sub-silo having a second outlet pipe for conducting the material to the second inlet conduit of the smelting furnace, said second inlet conduit being located in the upper part of the smelting furnace, in the vicinity of the furnace center.
  • the sub-silos are equally large in volume.
  • the volume flow of the feed material to the smelting furnace varies at different points of the furnace, so that the volume flow is larger in the vicinity of the furnace center than in the periphery, at a distance from the center. Therefore the flowing rate and volume flow of the material arriving in the vicinity of the center is larger than that of the material arriving near the periphery.
  • the flowing rates of the material flowing out of the sub-silo are different, also the material residence times are different, and therefore the temperatures of the material flows arriving from the sub-silos at different points of the furnace likewise become different. This is disadvantageous with respect to an optimal operation of the smelting furnace .
  • the object of the invention is to eliminate the above mentioned drawbacks .
  • a particular object of the invention is to introduce a method and preheating system by means of which the temperatures of material flows arriving at different points of a smelting furnace are made essentially equally high.
  • the method according to the invention is characterized by what is set forth in claim 1. Moreover, the system according to the invention is characterised by what is set forth in claim 3.
  • the residence time of a volume unit of the material flow in the second sub-siIo is arranged to be longer than in the first sub-silo, so that the temperatures of the first and second material flows are rendered essentially equally high.
  • the volume of the second sub-silo is larger than the volume of the first sub-silo.
  • An advantage of the invention is that the temperatures of the material flows entering the smelting furnace are equally high irrespective of the different feed points through which they are fed into the smelting furnace. This enhances an optimal operation of the smelting furnace.
  • the volume of the second sub-silo is arranged to be larger than the volume of the first sub-silo, in which case the residence time of a volume unit of the material flow in the second sub-silo is longer than in the first sub-silo .
  • the number of first sub-silos included in the preheating furnace is larger than the number of second sub-silos.
  • the preheating furnace is divided into three sub-silos, including two first sub-silos and one second sub-silo. Now there are provided three preheating furnaces per one smelting furnace.
  • the preheating furnace is divided into nine sub-silos, including six first sub-silos and three second sub-silos. Thus there is provided one preheating furnace per one smelting furnace .
  • Figure 1 illustrates an embodiment in principle of a preheating system according to the invention, seen in a scher ⁇ atical cross-section
  • Figure 2 illustrates a preheating furnace belonging to an embodiment of the preheating system according to the invention, seen axonometrically in a slanted view from the top
  • Figure 3 illustrates the preheating furnace of Figure 2, seen in a slanted view from below
  • Figure 4 illustrates a section IV-IV of Figure 2
  • Figure 5 illustrates a corresponding section as seen in Figure 4 of a preheating furnace belonging to another embodiment of the preheating system according to the invention.
  • Figure 1 is a simplified illustration of a preheating system for feeding material flows from a preheating furnace 1 to a smelting furnace 2.
  • the preheating furnace 1 is arranged to preheat the loose material in order to further feed said material into the smelting furnace 2.
  • the loose material can contain for example sintered pellets, lump ore, lump coke, lump carbon and lump quartzite.
  • the feed material is fed into the preheating furnace 1 from a storage silo (not illustrated) .
  • the storage silo serves as a gas seal for the furnace.
  • a distributor device 9 arranged in the upper part of the preheating furnace distributes the feed material into sub-silos 3, 6 that are arranged inside the preheating furnace. From these sub-silos 3, 6, the material flows downwards to the outlet pipes 4, 7 and therethrough to the smelting furnace 2.
  • the distributor device 9 rotates and stops automatically at the furnace sub- silos 3, 6, one after the other.
  • the filling level of the material in the sub-silos is controlled by continuous level measurements. If the material level in one of the sub-silos falls down to an alert level, the distributor device 9 automatically turns to fill said sub-silo first.
  • the material distribution is monitored, and control automatics take care that each outlet pipe is all the time full of' material, and that carbon monoxide has no access to the preheating furnace through the outlet pipes from the smelting furnace.
  • the heating of material in the sub-silos is carried out by a gas mixture fed therein through gas ducts 10.
  • the preheating furnace 1 comprises a first sub-silo 3 and a second sub-silo 6.
  • the first sub-silo 3 has a first outlet pipe 4 for conducting the material to a first inlet conduit 5 of the smelting furnace 2, which conduit 5 is located in the upper part of the smelting furnace, at a distance from the center of the smelting furnace.
  • the second sub-silo 6 has a second outlet pipe 7 for conducting the material to a second inlet conduit 8 of the smelting furnace, which inlet conduit 8 is placed in the upper part of the smelting furnace, in the vicinity of the furnace center.
  • the second flow of preheated material is conducted from the second sub-silo ⁇ along the second outlet pipe 7 to the second inlet conduit 8 of the smelting furnace with a second volume flow that is defined from the material downward-flowing rate at said point of the smelting furnace, and is thus larger than the first volume flow, because the material in the preheating furnace is settled slower in the periphery, at a distance from the center, than in the vicinity of the center.
  • the volume of the second sub-silo 6 is larger than the volume of the first sub-silo 3, in which case a longer residence time is obtained for the material in the second sub-silo 6, and the temperatures of the first and second material flows are rendered essentially equally high.
  • Figures 2 - 5 illustrate two embodiments of the preheating furnace 1, both of which embodiments include a larger number of first sub-silos 3 than second sub-silos 6, which are larger in size.
  • the preheating furnace 1 is by sectors divided into three sub-silos, including two first sub-silos 3, their sector angle ⁇ being 110 s , and one second sub-silo 6, its sector angle ⁇ being 140 2 .
  • the system can include three preheating furnaces 1 according to Figures 2 - 4 per one smelting furnace 2.
  • Figure 5 illustrates a preheating furnace 1 that is by sectors divided into nine sub-silos, including six first sub-silos 3 and three second sub-silos 6.
  • the sector angle ⁇ of the first sub-silos 3 is 35 a .
  • the sector angle ⁇ of the second sub-silos is 50 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

Dans un procédé pour introduire dans un four de fusion (2) des écoulements de matière provenant d'un four de préchauffage (1), on prévoit un four de préchauffage (1) qui présente au moins deux sous-silos, notamment un premier sous-silo (3) doté d'un premier tube de sortie (4) qui amène la matière vers un premier conduit d'entrée (5) du four de fusion (2), ledit conduit d'entrée (5) étant situé à distance du centre du four de fusion dans la partie supérieure du four, et un deuxième sous-silo (6) qui présente un deuxième tube de sortie (7) qui amène la matière vers un deuxième conduit d'entrée (8) du four de fusion, ledit conduit d'entrée (8) étant situé au voisinage du centre du four de fusion dans la partie supérieure du four. La matière est chauffée dans les sous-silos (3, 6) par introduction dans les deux sous-silos de quantités d'énergie thermique essentiellement identiques par rapport au débit volumique déchargé dudit silo. Un premier écoulement de matière est acheminé vers le premier conduit d'entrée à un premier débit volumique qui est défini par le débit d'écoulement de matière vers le bas audit point du four de fusion. Un deuxième écoulement de matière est acheminé vers le deuxième conduit d'entrée à un deuxième débit volumique qui est défini par le débit d'écoulement de matière vers le bas audit point du four et qui est supérieur au premier débit volumique. Le temps de séjour d'une unité de volume de l'écoulement de matière dans le deuxième sous-silo (6) est ajusté de manière à être supérieur à celui dans le premier sous-silo (3), de sorte que les températures du premier et du deuxième écoulement de matière sont amenées à être sensiblement élevées et identiques.
PCT/FI2008/050654 2007-11-21 2008-11-13 Procédé pour introduire dans un four de fusion des écoulements de matière provenant d'un four de préchauffage, et système de préchauffage Ceased WO2009066004A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN2008801169734A CN101878407B (zh) 2007-11-21 2008-11-13 用于将物料流从预热炉供给到冶炼炉中的方法和预热系统
BRPI0820318-0A BRPI0820318A2 (pt) 2007-11-21 2008-11-13 Método para alimentar fluxos de material de um forno de pré-aquecimento para um forno de fundição, e um sistema de pré-aquecimento
EA201000655A EA019835B1 (ru) 2007-11-21 2008-11-13 Способ подачи потоков материала из печи предварительного нагрева в плавильную печь и система предварительного нагрева
ZA2010/03205A ZA201003205B (en) 2007-11-21 2010-05-06 Method for feeding material flows from a preheating furnace to a smelting furnace and a preheating system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20075824A FI20075824L (fi) 2007-11-21 2007-11-21 Menetelmä materiaalivirtojen syöttämiseksi etukuumennusuunista sulatusuuniin ja etukuumennusjärjestelmä
FI20075824 2007-11-21

Publications (1)

Publication Number Publication Date
WO2009066004A1 true WO2009066004A1 (fr) 2009-05-28

Family

ID=38786754

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2008/050654 Ceased WO2009066004A1 (fr) 2007-11-21 2008-11-13 Procédé pour introduire dans un four de fusion des écoulements de matière provenant d'un four de préchauffage, et système de préchauffage

Country Status (6)

Country Link
CN (1) CN101878407B (fr)
BR (1) BRPI0820318A2 (fr)
EA (1) EA019835B1 (fr)
FI (1) FI20075824L (fr)
WO (1) WO2009066004A1 (fr)
ZA (1) ZA201003205B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230267454A1 (en) * 2016-09-30 2023-08-24 Winkk, Inc. Authentication and personal data sharing for partner services using out-of-band optical mark recognition
US12284512B2 (en) 2021-06-04 2025-04-22 Winkk, Inc. Dynamic key exchange for moving target
US12335399B2 (en) 2019-12-10 2025-06-17 Winkk, Inc. User as a password
US12341790B2 (en) 2019-12-10 2025-06-24 Winkk, Inc. Device behavior analytics
US12395353B2 (en) 2022-09-21 2025-08-19 Winkk, Inc. Authentication process with an exposed and unregistered public certificate
US12443700B2 (en) 2019-12-10 2025-10-14 Winkk, Inc. Automated ID proofing using a random multitude of real-time behavioral biometric samplings

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986818A (en) * 1973-12-14 1976-10-19 Klockner-Humboldt-Deutz Aktiengesellschaft Device for the thermal treatment of fine granular material with burning means with a heat exchanger system
US4083676A (en) * 1975-10-14 1978-04-11 Polysius Ag Method for heat treating fine-grain material
US4708640A (en) * 1984-06-27 1987-11-24 Outokumpu Oy Apparatus for batch preparation and feeding into the smelting process
FI105326B (fi) * 1991-01-17 2000-07-31 United Distillers Plc Dynaaminen lasermerkintä

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI105236B (fi) * 1998-06-15 2000-06-30 Outokumpu Oy Syöttölaitteisto sulatusuuniin syötettävän syöttöseoksen esivalmistamiseksi
CN2388579Y (zh) * 1999-08-10 2000-07-19 石家庄钢铁有限责任公司 炼钢合金预热装置
CN1975305A (zh) * 2006-12-14 2007-06-06 攀枝花市永兴钛业有限责任公司 密闭电炉及钛渣冶炼工艺

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986818A (en) * 1973-12-14 1976-10-19 Klockner-Humboldt-Deutz Aktiengesellschaft Device for the thermal treatment of fine granular material with burning means with a heat exchanger system
US4083676A (en) * 1975-10-14 1978-04-11 Polysius Ag Method for heat treating fine-grain material
US4708640A (en) * 1984-06-27 1987-11-24 Outokumpu Oy Apparatus for batch preparation and feeding into the smelting process
FI105326B (fi) * 1991-01-17 2000-07-31 United Distillers Plc Dynaaminen lasermerkintä

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230267454A1 (en) * 2016-09-30 2023-08-24 Winkk, Inc. Authentication and personal data sharing for partner services using out-of-band optical mark recognition
US12335399B2 (en) 2019-12-10 2025-06-17 Winkk, Inc. User as a password
US12341790B2 (en) 2019-12-10 2025-06-24 Winkk, Inc. Device behavior analytics
US12443700B2 (en) 2019-12-10 2025-10-14 Winkk, Inc. Automated ID proofing using a random multitude of real-time behavioral biometric samplings
US12284512B2 (en) 2021-06-04 2025-04-22 Winkk, Inc. Dynamic key exchange for moving target
US12395353B2 (en) 2022-09-21 2025-08-19 Winkk, Inc. Authentication process with an exposed and unregistered public certificate
US12425230B2 (en) 2022-09-21 2025-09-23 Winkk, Inc. System for authentication, digital signatures and exposed and unregistered public certificate use
US12438731B2 (en) 2022-09-21 2025-10-07 Winkk, Inc. Diophantine system for digital signatures
US12445305B2 (en) 2022-09-21 2025-10-14 Winkk, Inc. Authentication process

Also Published As

Publication number Publication date
FI20075824A7 (fi) 2009-05-22
EA201000655A1 (ru) 2010-12-30
FI20075824L (fi) 2009-05-22
CN101878407B (zh) 2013-01-09
CN101878407A (zh) 2010-11-03
FI20075824A0 (fi) 2007-11-21
EA019835B1 (ru) 2014-06-30
ZA201003205B (en) 2011-02-23
BRPI0820318A2 (pt) 2015-05-26

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