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WO2003012150A2 - Procede d'application en couche mince de laitier metallurgique sur une bande de transport tournant en continu - Google Patents

Procede d'application en couche mince de laitier metallurgique sur une bande de transport tournant en continu Download PDF

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Publication number
WO2003012150A2
WO2003012150A2 PCT/AT2002/000235 AT0200235W WO03012150A2 WO 2003012150 A2 WO2003012150 A2 WO 2003012150A2 AT 0200235 W AT0200235 W AT 0200235W WO 03012150 A2 WO03012150 A2 WO 03012150A2
Authority
WO
WIPO (PCT)
Prior art keywords
slag
intermediate vessel
conveyor belt
burner
thin
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/AT2002/000235
Other languages
German (de)
English (en)
Other versions
WO2003012150A3 (fr
Inventor
Anton Hulek
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP02766914A priority Critical patent/EP1412540A2/fr
Priority to JP2003517323A priority patent/JP2004536773A/ja
Publication of WO2003012150A2 publication Critical patent/WO2003012150A2/fr
Publication of WO2003012150A3 publication Critical patent/WO2003012150A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/06—Conveyors on which slag is cooled
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/07—Receptacle features where the slag is treated open to atmosphere
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
    • 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
    • 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
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to a method for thin-layer application of metallurgical slags to an endlessly rotating conveyor belt, the molten slag being filled via a filling opening into an intermediate vessel which can be heated with the aid of a burner and then metered from the intermediate vessel onto the conveyor belt, optionally metered via a distributor.
  • the molten slags are either cooled slowly under crystalline solidification or rapidly to amorphous or glassy solidification.
  • crystalline solidification it is known (EP 1 083 236 A1) to pass the molten slag into an intermediate vessel from which the slag is discharged in a metered manner via a slag stopper and poured evenly onto a trough belt via a distributor.
  • the poured slag cools slowly on the trough belt, the dry cooling used on the one hand allowing simple heat recovery without polluting the environment and on the other hand leading to a crystalline slug which can advantageously be processed further.
  • the molten slag is poured in thin layers onto a plate-shaped conveyor belt, over which the slag is rapidly cooled. This requires a corresponding re-cooling of the conveyor belt.
  • a prerequisite for uniform cooling under crystalline and amorphous solidification conditions is, however, that the molten slag can be poured from the intermediate vessel in a uniform, adapted thin layer onto the conveyor belt, which requires correspondingly high slag temperatures.
  • the intermediate vessel is heated by a burner before it is charged with molten slag, a continuous thin liquid of the slag can be removed during the gradual process Emptying the tundish cannot be ensured.
  • Premature cooling of the slag on the surface and shell formation in the bottom and wall area of the intermediate vessel must be expected, which can lead to freezing of the bottom-side slag plug. This applies in particular to steelworks slags with high melting points or electric furnace slags with a foamy consistency.
  • the invention is therefore based on the object of designing a method for thin-layer application of metallurgical slags to an endlessly rotating conveyor belt of the type described at the outset in such a way that the possible advantages with dry cooling of the slag poured onto the conveyor belt are advantageous both in terms of crystalline and in terms of amorphous solidification the slag and heat recovery can be used advantageously.
  • the invention solves the given tasks in that the rotationally symmetrical intermediate vessel for heating the filled slag is rotated with the help of the burner after an inclination about a horizontal pivot axis about its axis of rotation before the slag preheated to a predetermined temperature is poured out metered by a further inclination of the intermediate vessel about the horizontal pivot axis through the filling opening.
  • the rotation of the intermediate vessel during burner operation not only requires a corresponding circulating movement of the slag melt, but also leads to uniform heating of the intermediate vessel and the slag, if the surface of the slag bath extends to the filling opening with an appropriate safety distance, taking into account an appropriate safety distance , If the intermediate vessel is increasingly inclined after the slag has been heated to the desired casting temperature, the molten slag can be poured from the intermediate vessel evenly and in doses onto the conveyor belt in order, if necessary, to ensure a thin-layer application of slag onto the rotating, possibly cooled conveyor belt with the interposition of a distributor , The pivoting adjustment of the intermediate vessel about the horizontal pivot axis required for the metered pouring out of the slag can be ensured in a comparatively simple manner by control technology.
  • the burner can be arranged in different ways, there are particularly simple conditions on the one hand with regard to heating the slag and on the other hand with regard to emptying the slag if the slag is heated from the outside through the filling opening of the intermediate vessel via the burner, because in this case the burner is arranged in a fixed position can and does not stand in the way of emptying the tundish. It is only necessary to ensure that the burner is only switched on when the filling opening of the intermediate vessel is aligned with the burner so that its flame is directed through the filling opening into the intermediate vessel.
  • the intermediate vessel is advantageously pivoted from an upright filling position about the horizontal pivot axis into an intermediate position in which the slag level reaches the edge of the filling opening up to a safety distance. From this intermediate position, the vessel is then pivoted further for the metered pouring out of the molten slag, so that the slag melt can flow out over the edge of the filling opening. If necessary, the burner can also be switched on during the pouring process, as long as its flame is directed against the slag level.
  • FIG. 1 shows a device for the thin-layer pouring of molten slag onto an endlessly rotating conveyor belt in a schematic plan view, partly broken open, and
  • Fig. 2 shows this device in a side view.
  • molten slag is to be poured in a uniform, thin layer 1 onto an endlessly rotating conveyor belt 2, which is built up from individual plates which are articulated to one another is.
  • an intermediate vessel 3 is provided with a corresponding refractory lining for receiving the molten slag to be poured, which is introduced into the rotationally symmetrical intermediate vessel 3 via a filling opening 4 and also emptied again.
  • the intermediate vessel 3 is pivotally mounted about a horizontal pivot axis 6 running transversely to the axis of rotation 5.
  • the intermediate vessel 3 can be rotated about the axis of rotation 5.
  • the intermediate vessel 3 is pivoted out of an upright pivot position 15, indicated by dashed lines, for filling the molten slag into an intermediate position 16 drawn with solid lines, in which the mirror 17 of the slag melt taking into account a safety distance to the lower one Edge of the filling opening 4 is sufficient.
  • the filling opening 4 of the intermediate vessel 3 is opposite a burner 18, via which the slag in the intermediate vessel 3 is heated to a predetermined pouring temperature, with the simultaneous rotation of the intermediate vessel 3 about its axis of rotation 5.
  • the melt flows out of the intermediate vessel 3 at the predetermined pouring temperature via the filling opening 4 from the intermediate vessel 3 in order to on the conveyor belt 2 To form slag layer 1.
  • the slag can be poured from the intermediate vessel 3 directly onto the conveyor belt 2.
  • This distributor 20 can also be heated in order to avoid cooling of the slag in the region of the distributor 20 which impairs the uniform layer structure.
  • cross-sectionally V-shaped overflows give single channels with little heat radiation, so that these channels flow together on the conveyor belt 2 to form a uniform thin slag layer 1.
  • the intermediate vessel 3 Since sedimentation of the molten metal contained in the molten bath must be expected, it is advisable not to pour the molten bath completely onto the conveyor belt 2, but only up to a remaining amount to cover this remaining amount with the enriched molten metal before the intermediate vessel 3 is recharged empty from the intermediate vessel 3. For this purpose, the intermediate vessel 3 only needs to be pivoted so far that this residual amount can be emptied into a corresponding collecting vessel 21.
  • the burner 18 is operated as a function of the respective slag temperature in such a way that the pouring temperature of the slag is as constant as possible. This means that the burner 18 may also be switched on during the casting process, which is possible as long as the burner flame is directed through the filling opening 4 against the melting level 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Details (AREA)

Abstract

Procédé d'application en couche mince de laitier métallurgique sur une bande de transport (2) tournant en continu, selon lequel le laitier en fusion est introduit par une ouverture de remplissage (4) dans un récipient intermédiaire (3) pouvant être chauffé à l'aide d'un brûleur (18), puis éventuellement dosé à l'aide d'un distributeur (20) et versé sur la bande de transport (2). Selon la présente invention, pour que ledit procédé soit mis en oeuvre de manière avantageuse, le récipient intermédiaire (3) symétrique en rotation (3), destiné à réchauffer à l'aide du brûleur (18) le laitier introduit, est tourné autour de son axe de rotation après inclinaison autour d'un axe de basculement horizontal (6), avant que le laitier préchauffé à une température prédéterminée ne soit versé de manière dosée par l'ouverture de remplissage (4) par une nouvelle inclinaison du récipient intermédiaire (3) autour de l'axe de basculement horizontal (4).
PCT/AT2002/000235 2001-08-03 2002-08-05 Procede d'application en couche mince de laitier metallurgique sur une bande de transport tournant en continu Ceased WO2003012150A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP02766914A EP1412540A2 (fr) 2001-08-03 2002-08-05 Procede d'application en couche mince de laitier metallurgique sur une bande de transport tournant en continu
JP2003517323A JP2004536773A (ja) 2002-08-05 2002-08-05 無端で循環するコンベヤベルト上に冶金スラグを薄層で塗布する方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0121601A AT409970B (de) 2001-08-03 2001-08-03 Verfahren zum dünnschichtigen auftragen metallurgischer schlacken auf ein endlos umlaufendes förderband
ATA1216/2001 2001-08-03

Publications (2)

Publication Number Publication Date
WO2003012150A2 true WO2003012150A2 (fr) 2003-02-13
WO2003012150A3 WO2003012150A3 (fr) 2003-09-12

Family

ID=3687292

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2002/000235 Ceased WO2003012150A2 (fr) 2001-08-03 2002-08-05 Procede d'application en couche mince de laitier metallurgique sur une bande de transport tournant en continu

Country Status (3)

Country Link
EP (1) EP1412540A2 (fr)
AT (1) AT409970B (fr)
WO (1) WO2003012150A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111500804A (zh) * 2020-06-01 2020-08-07 上海驰春节能科技有限公司 一种利用液态钢渣生产钢渣粉末的装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1366398A (en) * 1918-01-10 1921-01-25 Lund Joel Process of and apparatus for making slag
FR1005803A (fr) * 1947-09-26 1952-04-16 Procédé pour la fabrication de pièces moulées à partir de laitiers
FR63633E (fr) * 1952-12-23 1955-09-30 Huettenwerk Rheinhausen A G Procédé et dispositif pour la coulée d'une masse liquide en ignition, par exemplepour la coulée du laitier de haut fourneau
JP2000510197A (ja) * 1996-05-15 2000-08-08 フェスト アルピネ インダストリアル サーヴィシス ゲゼルシャフト ミット ベシュレンクテル ハフツング ガラス質又はガラス化した溶鉱炉スラグを連続的に生産する方法
DE19932382A1 (de) * 1999-07-14 2001-01-18 Asea Brown Boveri Verfahren und Vorrichtung zur Herstellung einer Schaumschlacke
EP1083236A1 (fr) * 1999-09-09 2001-03-14 Anton Dipl.-Ing. Hulek Procédé et installation pour le refroidissement à sec de scories métallurgiques avec récupération de chaleur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111500804A (zh) * 2020-06-01 2020-08-07 上海驰春节能科技有限公司 一种利用液态钢渣生产钢渣粉末的装置及方法

Also Published As

Publication number Publication date
WO2003012150A3 (fr) 2003-09-12
ATA12162001A (de) 2002-05-15
AT409970B (de) 2002-12-27
EP1412540A2 (fr) 2004-04-28

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