EP0210658A1 - Appareil pour séparer les trop gros grains du matériau de déchargement chaud produit dans un four rotatif de réduction directe de minerais de fer - Google Patents

Appareil pour séparer les trop gros grains du matériau de déchargement chaud produit dans un four rotatif de réduction directe de minerais de fer Download PDF

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Publication number
EP0210658A1
EP0210658A1 EP86110565A EP86110565A EP0210658A1 EP 0210658 A1 EP0210658 A1 EP 0210658A1 EP 86110565 A EP86110565 A EP 86110565A EP 86110565 A EP86110565 A EP 86110565A EP 0210658 A1 EP0210658 A1 EP 0210658A1
Authority
EP
European Patent Office
Prior art keywords
gas
tight
grate
container
collecting container
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.)
Granted
Application number
EP86110565A
Other languages
German (de)
English (en)
Other versions
EP0210658B1 (fr
Inventor
Helmut Ernst
Alfred Breier
Manfred Schwalbach
Karl-Heinz Will
Alan Buchanan Cameron
Peter Cecil Bates
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.)
GEA Group AG
New Zealand Steel Ltd
Original Assignee
Metallgesellschaft AG
New Zealand Steel Ltd
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 Metallgesellschaft AG, New Zealand Steel Ltd filed Critical Metallgesellschaft AG
Publication of EP0210658A1 publication Critical patent/EP0210658A1/fr
Application granted granted Critical
Publication of EP0210658B1 publication Critical patent/EP0210658B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/33—Arrangement of devices for discharging
    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/32—Arrangement of devices for charging
    • F27B2007/3282—Details
    • F27B2007/3294—Means to fluidise the charge in the air
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0038—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising shakers
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/007—Cooling of charges therein
    • F27D2009/0081—Cooling of charges therein the cooling medium being a fluid (other than a gas in direct or indirect contact with the charge)
    • F27D2009/0083—Cooling of charges therein the cooling medium being a fluid (other than a gas in direct or indirect contact with the charge) the fluid being water
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0035—Devices for monitoring the weight of quantities added to the charge

Definitions

  • the invention relates to a device for separating Uber grain from the hot A ustragsmaterial of a rotary kiln in which D irektredulement of iron oxide-containing materials to sponge iron, consisting of a stationary kiln head which includes the discharge end of the rotary kiln gas-tight, one arranged in the furnace head sieve-like separator, one on the furnace head arranged discharge for the oversized particles and a discharge device for the sieve-like device through the T racing continuous grain.
  • the A ustragsmaterial the rotary kiln consists of a mixture of sponge iron, waste coal, ash and possibly desulfurization. It is carried out at a temperature of around 800 to 1200 ° C.
  • the discharge material can also contain oversize pieces, such as dropped approaches, agglomerated parts of the feed or pieces from the refractory lining. This oversize must be removed before the discharge material melts. If the discharge material in the hot state to be charged into the melting furnace, the A must btren- planning the oversize in the hot state carried out, and the discharge material must be protected against the ingress of air, thus re-oxidation is avoided. In some cases, the fine grain should also be sieved while hot before the material is charged into the melting furnace. In this case too, reoxidation must be avoided.
  • a separating device in which a coarse grate for separating the oversize is first arranged in the furnace head, the oversize falling out of the furnace head through a flap. Under the coarse grate, a swing or R üttelsieb is arranged. The fine grain falls through a chute into a K ühltrommel, and production falls from the screen by a chute into a mobile transport container which is emptied into an electric furnace. With this arrangement, the transport container can be overfilled, which causes considerable problems. In addition, the rotary kiln must be shut down in the event of a malfunction in the removal of production.
  • the invention has for its object to enable smooth removal and transport of the separated hot material and to avoid shutdowns of the rotary kiln.
  • Jie sieve-like separator is formed l as a rigid cooled grate and arranged inclined to a collecting container 3 is arranged for the oversize particles to the furnace head 2 A is provided uffangbe- container 3 at the discharge end with a closure slider 4, the collecting container 3 is enclosed in an gastight manner by an outer container 5, the outer container 5 is equipped with a gas-tight closure flap 6 and a gas-tight connection 7 for a transport container 8, the furnace head 2 is formed under the grate 1 as a buffer bunker 9 for the falling grain, to which buffer bin 9, a D osierbunker 10 is connected with a gas-tight top closure device 11 of the metering hopper 10 to the a ustragsseite with a gas-tight bottom closure device 12 and a gas-tight connection 13 is provided for a transport container 14, and the volume of D osierbunkers 10 is less than the volume of the transport container lters 14.
  • the furnace head can be designed to be movable for repair purposes.
  • the grate can be cooled by means of liquid or gaseous cooling media which are introduced into the grate, flow through the grate or parts of the grate and are then removed again from the grate. Water is generally used as the cooling medium.
  • the collecting container for the oversize grain expediently consists of an inclined chute into which the oversize grain falls from the grate and is collected when the slide valve is closed.
  • the outer container enclosing the discharge end of the A uffangbe- mboers gas-tight and is formed so that the VerschluBschieber has in the open position it in place, and that the closure flap can be arranged below the discharge end of the collecting container in the outer container.
  • Transport container is connected to the outer container, both the slide valve and the flap can be in the open position so that oversize immediately falls into the transport container. If the oversize is collected in the collection container with the closure slide closed, the closure flap is first opened before the collection container is emptied, so that the oversize does not fall onto the closed closure flap.
  • the gas-tight seal means between buffer bin and D osierbunker and at the discharge end of the dosing hopper are expediently designed as a gastight aterialschieber M.
  • the klei kidney volume of D osierbunkers compared to the volume of the transport container to prevent overfilling of the transport container and prevents closing the damper against a column of material.
  • the usable volume of the dosing hopper is expediently set to 75 to 90%, preferably approximately 85%, of the usable volume of the transport container.
  • the filling of the D osier- bunker from the buffer bin with closed exhaust valve and open the inlet vane is preferably carried out such that the D is filled osierbunker not completely. This ensures that the upper slide also does not have to be closed against a column of material. This can be done by the fact that the time clock of the filling is chosen the dosing hopper from the buffer bin so that the volume present in the buffer bin of material is less than the effective volume of D osierbunkers. The required timing can be determined, for example, by measuring probes.
  • closure slide 4 is formed on the collecting container 3 as a segment slide.
  • a segment slide is particularly insensitive to the impact of hot oversize particles.
  • a preferred embodiment is that the grate 1 is arranged at an angle of 25 to 32 ° to the horizontal. This angle results in very good separation results without the risk of the grate becoming blocked.
  • the grate 1 consists of cooled longitudinal bars 15 and cross bars 16 below the sliding plane 17 of the longitudinal bars 15. This ensures that the material slides well and prevents slate-like, larger pieces from falling through. In addition, an expansion of the gap opening between the longitudinal bars is prevented by deformation of the longitudinal bars.
  • the cross bars do not require cooling.
  • a preferred embodiment is that the cross rungs 16 are fixed on one side to the longitudinal bars 15. This avoids the transfer of thermal expansion and makes it easy to replace.
  • a preferred feature is that ufferbunker between P and collecting container 3 an overflow point 18 is arranged. 9 The overflow point enables the discharge of the entire material through one of the two discharge lines if there is a fault in the other discharge line.
  • a preferred feature is that a driven sieve under the grate 1 are arranged 19 with opposite inclination to the grate 1, the coarse grain in the buffer bin 9 falls and ufferbunker between the P 9 and the collecting vessel 3, a second P ufferbunker 20 for by the sieve 19 falling fine grain is arranged, the second buffer bunker 20 is equipped with a gas-tight closure device 21 and is connected to a cooler 23 with a connecting line 22.
  • the coarse grain as product fraction can be separated from the fine grain (abrasion, ash, desulfurizing agent, excess coal) in the hot state from the material if this separation is required for further processing.
  • the cooler is connected to the connecting line in a gas-tight manner and is in an oven atmosphere. The cooling takes place indirectly.
  • the supporting structure of the sieve is cooled.
  • the stationary furnace head 2 encloses a gastight manner, the discharge end of the rotary kiln 24.
  • a ustragsgut falls on the rigid grate 1.
  • the grate 1 is introduced via line 25 cooling water, and via line 26 the heated cooling water is discharged.
  • the grate 1 is arranged at an angle of 30 °.
  • the oversize falls from the end of the grate 1 into the collecting container 3, the discharge end of which is closed by the segment slide 4.
  • the collecting container 3 and the segment slide 4 are enclosed gas-tight by the outer container 5.
  • the gas-tight closure flap 6 is arranged inside the outer container 5.
  • the flap 6 seals against the seals 27 which are fastened to the walls 28.
  • the seal 27 is arranged so that it lies outside the material flow.
  • a gas-tight telescopic connection 7 for the transport container 8 is arranged.
  • the closure flap 6 is brought into the open position 6a and then the segment slide 4 is brought into the open position 4a.
  • the falling through the grate 1 material falls in the buffer bin 9.
  • the F ufferbunkers 9 11 is arranged as a closing device, a gas-tight slide osierbunker to the the D 10 is connected.
  • the D osierbunker 10 has a gas-tight slide 12 as a closure device at the lower end.
  • a gas-tight telescopic connection 13 for the transport container 14 is arranged on the slide 12.
  • the drives for the locking devices are connected to one another in such a way that operating errors are prevented.
  • Buffer bunker 9 and collecting container 3 are connected to one another by an overflow weir 18 as an overflow point, so that the rotary kiln operation does not have to be interrupted immediately in the event of a transport system malfunction.
  • FIG. 2 there is also a mechanically driven S in the furnace head 2 below the grate 1 ; b 1 9 arranged, which has an opposite inclination to the grate 1.
  • the drive 29 for that Sieve 19 is arranged outside the furnace head 2.
  • the T RAG construction for the screen lining is cooled by cooling water which is introduced via line 30 and discharged via line 31st
  • the material falling through the grate 1 is fed to the sieve 19 via the chute 32.
  • the coarse material falls as a product fraction from the sieve 19 into the buffer bunker 9.
  • the fine-grained material falling through the sieve falls into the second buffer bunker 20, which has a gas-tight slide 21 as a closure device at the lower end.
  • connection line 22 On the slider 21 a connection line 22 is connected, the gas-tight manner in the D rehrohrkühler 23 performs.
  • the slide 21 can be constantly open and can only be closed for repair work.
  • An overflow weir 18a is arranged between the buffer bunker 9 and the second buffer bunker 20.
  • the grate 1 ( Figures 3 and 4) consists of longitudinal bars 15, each having a water inlet 25 and water outlet 26.
  • the cross rungs 16 are attached to the longitudinal rods 15 below the sliding planes 17 of the longitudinal rods 15.
  • the cross rungs 16 are each fixed on one side to a longitudinal bar 15, so that no constraints can occur due to thermal expansion.
  • the advantages of the invention are that the separated, hot material can be discharged into the transport container with complete exclusion of air, an exact metering of the volume carried out takes place and thus an overfilling of transport containers is avoided with certainty.
  • the other transport route can be used to discharge all of the material, thus preventing the rotary kiln from being shut down immediately.
EP86110565A 1985-08-01 1986-07-30 Appareil pour séparer les trop gros grains du matériau de déchargement chaud produit dans un four rotatif de réduction directe de minerais de fer Expired EP0210658B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853527621 DE3527621A1 (de) 1985-08-01 1985-08-01 Vorrichtung zum abtrennen von rberkorn aus dem heissen austragsmaterial eines drehrohrofens bei der direktreduktion von eisenoxidhaltigen materialien zu eisenschwamm
DE3527621 1985-08-01

Publications (2)

Publication Number Publication Date
EP0210658A1 true EP0210658A1 (fr) 1987-02-04
EP0210658B1 EP0210658B1 (fr) 1988-12-14

Family

ID=6277408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110565A Expired EP0210658B1 (fr) 1985-08-01 1986-07-30 Appareil pour séparer les trop gros grains du matériau de déchargement chaud produit dans un four rotatif de réduction directe de minerais de fer

Country Status (8)

Country Link
US (1) US4680009A (fr)
EP (1) EP0210658B1 (fr)
AU (1) AU578006B2 (fr)
BR (1) BR8603636A (fr)
DE (2) DE3527621A1 (fr)
ES (1) ES2000811A6 (fr)
IN (1) IN164017B (fr)
NZ (1) NZ216873A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557028A1 (fr) * 1992-02-15 1993-08-25 British Nuclear Fuels PLC Système de dosage
WO1997026495A2 (fr) * 1996-01-18 1997-07-24 Siemens Aktiengesellschaft Dispositif de dechargement
US5915308A (en) * 1996-01-18 1999-06-29 Siemens Aktiengesellschaft Discharge apparatus
CN1089371C (zh) * 1999-11-10 2002-08-21 天津钢管还原铁厂 一种常温海绵铁除氧剂生产方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1178277A1 (fr) * 2000-04-25 2002-02-06 BMH Claudius Peters GmbH Procédé et installation pour uniformiser le flux de matières traitées expulsées d'un four rotatif vers le refroidisseur
US6474985B1 (en) 2002-04-17 2002-11-05 Metso Minerals Industries, Inc. Toothed grate for rotary kiln peripheral discharge openings
CN100348736C (zh) * 2003-12-18 2007-11-14 岳庆丰 Qf－ly法生产球状、扁球状和方块状的海绵铁的新工艺
CN100567509C (zh) * 2005-12-31 2009-12-09 岳庆丰 无外燃烧室的隧道窑及其组合隧道窑生产直接还原铁
DE102012103588A1 (de) 2012-04-24 2013-10-24 Thyssenkrupp Resource Technologies Gmbh Anlage und Verfahren zur Wärmebehandlung von körnigem und stückigem Material
DE102018215348A1 (de) * 2018-09-10 2020-03-12 Thyssenkrupp Ag Kühler zum Kühlen von Klinker und Verfahren zum Betreiben eines Kühlers zum Kühlen von Klinker
CN111322413A (zh) * 2020-04-01 2020-06-23 河南龙成煤高效技术应用有限公司 一种回转窑密封系统和回转窑设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862808A (en) * 1957-07-31 1958-12-02 Alan N Mann Apparatus and method for reducing iron oxide pellets
GB831634A (en) * 1958-01-27 1960-03-30 Thomas Walter Plante Sinter treating apparatus and method
FR2173154A1 (fr) * 1972-02-23 1973-10-05 Thyssen Niederrhein Ag
GB2047888A (en) * 1979-04-23 1980-12-03 Hylsa Sa Separating insufficiently cooled metals sponge particles from a mass of such particles
DE3239188A1 (de) * 1981-10-26 1983-07-14 Sumitomo Heavy Industries, Ltd., Tokyo Verfahren zum herstellen von stahl aus direktreduziertem eisen
EP0086488A2 (fr) * 1982-02-16 1983-08-24 Deutsche Kommunal-Anlagen Miete GmbH Dispositif de déchargement pour four à tambour rotatif

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US2225283A (en) * 1937-11-04 1940-12-17 Voigtlaender Erich Otto Heat exchange apparatus
FR1459195A (fr) * 1965-10-05 1966-04-29 Produits Refractaires Procédé et dispositif de cuisson de produits réfractaires
US3589313A (en) * 1968-08-30 1971-06-29 Us Health Education & Welfare Solid waste disposal method and apparatus
US3584587A (en) * 1969-10-20 1971-06-15 Gianni Siracusa Garbage disposal system
US3831291A (en) * 1972-08-16 1974-08-27 Fuller Co Method and apparatus for treatment of particulate material
US4076493A (en) * 1976-09-09 1978-02-28 Kennedy Van Saun Corporation Apparatus for cooling particulate material
DE2657238C3 (de) * 1976-12-17 1982-05-06 Klöckner-Humboldt-Deutz AG, 5000 Köln Schachtofen mit gekühlten Hohlträgern im Ofeninnenraum
DE3123589A1 (de) * 1981-06-13 1983-01-13 Fried. Krupp Gmbh, 4300 Essen "vorrichtung zum abtrennen des im drehrohrofen erzeugten eisenschwammprodukts"
US4629421A (en) * 1985-11-18 1986-12-16 Fuller Company Gas and solid particulate material heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862808A (en) * 1957-07-31 1958-12-02 Alan N Mann Apparatus and method for reducing iron oxide pellets
GB831634A (en) * 1958-01-27 1960-03-30 Thomas Walter Plante Sinter treating apparatus and method
FR2173154A1 (fr) * 1972-02-23 1973-10-05 Thyssen Niederrhein Ag
GB2047888A (en) * 1979-04-23 1980-12-03 Hylsa Sa Separating insufficiently cooled metals sponge particles from a mass of such particles
DE3239188A1 (de) * 1981-10-26 1983-07-14 Sumitomo Heavy Industries, Ltd., Tokyo Verfahren zum herstellen von stahl aus direktreduziertem eisen
EP0086488A2 (fr) * 1982-02-16 1983-08-24 Deutsche Kommunal-Anlagen Miete GmbH Dispositif de déchargement pour four à tambour rotatif

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557028A1 (fr) * 1992-02-15 1993-08-25 British Nuclear Fuels PLC Système de dosage
US5287391A (en) * 1992-02-15 1994-02-15 British Nuclear Fuels Plc Metering system
WO1997026495A2 (fr) * 1996-01-18 1997-07-24 Siemens Aktiengesellschaft Dispositif de dechargement
WO1997026495A3 (fr) * 1996-01-18 1997-09-18 Siemens Ag Dispositif de dechargement
US5915308A (en) * 1996-01-18 1999-06-29 Siemens Aktiengesellschaft Discharge apparatus
CN1089371C (zh) * 1999-11-10 2002-08-21 天津钢管还原铁厂 一种常温海绵铁除氧剂生产方法

Also Published As

Publication number Publication date
DE3527621A1 (de) 1987-02-05
EP0210658B1 (fr) 1988-12-14
ES2000811A6 (es) 1988-03-16
AU578006B2 (en) 1988-10-06
BR8603636A (pt) 1987-03-10
DE3661425D1 (en) 1989-01-19
US4680009A (en) 1987-07-14
IN164017B (fr) 1988-12-31
AU6076286A (en) 1987-02-05
NZ216873A (en) 1989-02-24

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