WO1998001590A1 - Procede de valorisation de poussieres produites lors de processus metallurgiques, telles que des poussieres de convertisseur d'acierie contenant du zinc - Google Patents

Procede de valorisation de poussieres produites lors de processus metallurgiques, telles que des poussieres de convertisseur d'acierie contenant du zinc Download PDF

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Publication number
WO1998001590A1
WO1998001590A1 PCT/AT1997/000152 AT9700152W WO9801590A1 WO 1998001590 A1 WO1998001590 A1 WO 1998001590A1 AT 9700152 W AT9700152 W AT 9700152W WO 9801590 A1 WO9801590 A1 WO 9801590A1
Authority
WO
WIPO (PCT)
Prior art keywords
dusts
metal
analyzed
content
metallurgical
Prior art date
Application number
PCT/AT1997/000152
Other languages
German (de)
English (en)
Inventor
Johann Lehner
Bertram Fritz
Peter Paschen
Kurt Antlinger
Original Assignee
Voest-Alpine Industrieanlagenbau Gmbh
Voest-Alpine Stahl Linz 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 Voest-Alpine Industrieanlagenbau Gmbh, Voest-Alpine Stahl Linz Gmbh filed Critical Voest-Alpine Industrieanlagenbau Gmbh
Priority to EP97929014A priority Critical patent/EP0910678A1/fr
Publication of WO1998001590A1 publication Critical patent/WO1998001590A1/fr

Links

Classifications

    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/38—Removal of waste gases or dust
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02—Working-up flue dust
    • 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 method for recycling dusts produced in metallurgical processes, in particular in the manufacture of steel, and discharged with a process gas formed in the process, and a plant for carrying out the method.
  • the enrichment can reach such an extent that one is forced to remedy it, e.g. Partial quantities of dust to be separated from the recirculation process and to be disposed of or otherwise used. This is particularly the case with increased recycling of galvanized sheets; there is - without countermeasures - a steady increase in the zinc content.
  • EP-A-0434 120 discloses a process for working up metallurgical residues containing zinc and lead, in which the residues are subjected to conditions which reduce temperatures at elevated temperatures, zinc and lead being volatilized and evaporated zinc and lead from the exhaust gas cooling can be separated.
  • the thermal treatment at elevated temperatures takes place in a circulating fluidized bed
  • the invention therefore has as its object to provide a method and a plant for carrying out the method, which make it possible to prevent accumulation of undesired metals and other accompanying elements in the metallurgical process, but with a tolerable effort in the utilization of the dusts. In particular, it should be possible to recirculate most of the dust and still prevent an accumulation of unwanted metals and other accompanying elements.
  • the dusts are analyzed with regard to a content of at least one metal which is undesirable for the metallurgical process, and in particular for zinc in the steel production,
  • the separated dusts are subjected to an enrichment treatment at least with regard to the analyzed metal, with a partial amount of the separated dusts with a high content of analyzed metal and a subset with a low content of the analyzed metal below the limit value and • the partial amount of the dusts with a low content of analyzed metal becomes part of the metallurgical process and the subset with a high content of analyzed metal the dust is recycled from this metal
  • a high degree of recirculation can be achieved by returning the dusts to the metallurgical process if the content of the analyzed metal falls below the limit.
  • the analysis of the content of at least one metal of the dusts is advantageously carried out continuously.
  • Continuous is also understood to mean a mode of operation in which, for example, metals contained in the dust are analyzed at least once every five minutes. It is preferably analyzed five to twenty times per minute.
  • a mean value is then expediently formed from a plurality of measurement results, and only when this exceeds the limit value is a separation of the dusts with analysis values above the limit value carried out.
  • the dusts are compressed, in particular agglomerated, after the analysis has been carried out and before the enrichment treatment.
  • the enrichment treatment for at least the analyzed metal is carried out according to a pyrometallurgical method in which the dusts are subjected to a thermal treatment under reducing conditions, namely at a temperature at which at least the analyzed metal is evaporated, but the dust particles melt is avoided.
  • the temperature and pressure are expediently kept in a range in which further undesired components, such as chlorides and alkalis, also evaporate.
  • the metal escaping during the evaporation is expediently either oxidized then cooled and filtered or condensed / sublimed
  • a metallurgical vessel preferably a converter
  • An exhaust gas purification device which is connected to the metallurgical vessel by means of a gas discharge leading from the metallurgical vessel to a process gas
  • An analysis device for measuring the content of at least one metal contained in the dusts and undesirable in the metallurgical vessel
  • a further conveyor device arranged downstream of the treatment device for the removal of a partial quantity of the dusts with a high content of analyzed metal to a processing plant, in particular a metal extraction plant, for the analyzed metal.
  • the separating device is expediently followed by a compression device for the dusts with a high content of analyzed metal, in particular an agglomeration device.
  • the treatment device for enriching a metal preferably comprises a pyrometallurgical plant, the pyrometallurgical plant advantageously comprising a solid-state reactor, in particular a medium-frequency induction furnace.
  • a return line expediently leads from the cutting device to the metallurgical vessel, a compression device advantageously being provided in the return line.
  • the invention is explained in more detail below with reference to a process sequence shown in the drawing in the block diagram, the exemplary embodiment relating to steel production.
  • the method according to the invention can, however, be used for the entire metallurgical industry, for example in the pyrometallurgy of lead (lead shaft furnace and so-called direct reduction process, for example KIVCET). , copper (shaft furnace for secondary copper production, especially when using zinc-containing scrap and other materials) and tin (mixed tin production and recycling).
  • the metal compounds evaporating at the prevailing working temperatures are selectively volatilized and post-oxidized in the gas stream depending on the oxygen partial pressure.
  • the separated dust particles can be adjusted in their content of valuable metals in such a way that an optimal further processing possibility is guaranteed depending on the subsequent process.
  • Pig iron, scrap metal, lime and other additives are used in a metallurgical vessel designed as a converter 1 for steel production.
  • the exhaust gases generated when blowing the convector are fed to an evaporation cooler 2 for the coarse separation of dusts and further passed through an electrostatic filter 3 for the separation of the fine fraction (e.g. particle size below 100 ⁇ m) of the dusts.
  • the dusts deposited in the electrostatic filter 3 are analyzed with respect to at least one metal which is undesirable for steel production, in particular with regard to the zinc content, by means of an analysis device 4.
  • the analysis is preferably carried out continuously, with continuous measurements at shorter time intervals also being regarded as continuous. For example, five to twenty measurements can be carried out per minute.
  • the analytical device 4 required for this is advantageously installed on a conveying means which continues the separated dusts, for example a nitrogen-flooded conveyor belt.
  • a conveying means which continues the separated dusts, for example a nitrogen-flooded conveyor belt.
  • Laser-induced plasma spectroscopy (LIPS) and X-ray fluorescence analysis can be used as the analysis device, for example.
  • a dust composition of the dusts separated in the electrostatic filter is given in Table 1 below as an example.
  • Table I A dust composition of the dusts separated in the electrostatic filter is given in Table 1 below as an example.
  • a separating device 5 Downstream of the analysis device 4 is a separating device 5 for separating the dusts with a high content of analyzed metal from the dusts with a low content of analyzed metal.
  • this cutting device is designed as a flap 5. If, for example, the analyzed dust has the composition given in Table I - here the zinc content is above the predetermined limit value, which can be set between 5 and 40% by weight, preferably between 10 and 20% by weight - the dusts no longer become Via a return line 6 with agglomerating device 6 'or pelletizing device, in which external metallurgical dust (at 7) with a low zinc content can also be mixed into the metallurgical vessel 1, ie the converter 1, fed back, but fed via the flap 5 to a further treatment rail, which is generally designated 8.
  • This treatment rail 8 is formed by a compression device 9, which is advantageously designed as an agglomeration device or as a granulation device - here, too, external metallurgical dust (at 10) with a high zinc content can be added - the treatment device 11 for the enrichment of at least the metal, the content of which has been analyzed is subordinate.
  • a swiveling trough is provided instead of the flap 5, with which the dust produced in the form of sludge is in one depending on the zinc content can be conveyed by two sedimentation containers.
  • Chamber filter presses for dewatering the dusts are arranged downstream of the sedimentation containers, after which the agglomeration can be carried out with an agglomerating device.
  • the agglomeration device is followed by drying, which is carried out, for example, in a drying oven in order to avoid the generation of hydrogen gas in the downstream treatment device 11.
  • the treatment device 11 is preferably a pyrometallurgical system, for example a medium-frequency induction furnace, in which the introduced dusts be subjected to a thermal treatment under reducing conditions, etc. at a temperature at which at least the analyzed metal and expediently also other undesired components such as chlorides and alkalis evaporate, but melting of the agglomerated dust particles is avoided.
  • a pyrometallurgical system for example a medium-frequency induction furnace, in which the introduced dusts be subjected to a thermal treatment under reducing conditions, etc. at a temperature at which at least the analyzed metal and expediently also other undesired components such as chlorides and alkalis evaporate, but melting of the agglomerated dust particles is avoided.
  • the agglomerated dusts are inductively heated to over 900 ° C, i.e. via the evaporation points of Pb and Zn.
  • the reducing gas to be introduced is also (previously) heated to over 1000 ° C.
  • Zn oxide and Zn spinels ZnO.Fe 2 O
  • Agglomeration before the pyrometallurgical treatment stage is not absolutely necessary, but the fine dusts lead to an undesirable, unmanageable dust management
  • the metal escaping during the evaporation and the accompanying elements also evaporating in the process are oxidized in a post-treatment station 12, cooled and condensed and / or sublimed and finally filtered in a filter 13.
  • the composition of the filtered material is shown in Table II below.
  • the filtered material is then available for removal to external processing for zinc production, such as a zinc smelter, etc.
  • the enrichment treatment can also be carried out in two stages, the temperature being kept below the vaporization point of Zn in the first stage, as a result of which only the spinels are cracked and the Zn oxides are reduced beforehand.
  • the second stage is a hydrometallurgical reduction based on NH . i or NaOH downstream.
  • the solid reactor 11 In the pyrometallurgical separation stage, ie the solid reactor 11, there is only a very small amount of substance to be treated, so that the solid reactor 1 1 is small can be kept and also requires little energy for its operation.

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

Abstract

L'invention vise à éviter la concentration de métaux indésirables et d'autres éléments associés, lors de l'application d'un processus métallurgique, tout en garantissant un rendement élevé dudit processus métallurgique. A cet effet, on met en oeuvre un procédé de valorisation de poussières produites lors du processus métallurgique, comportant les étapes suivantes: la teneur des poussières en au moins un métal indésirable pour le processus métallique, notamment la teneur en zinc pour la production de l'acier, est déterminée; si la teneur en métal détecté dépasse une valeur seuil, au moins une partie des poussières présentant la teneur supérieure à la valeur seuil est séparée des poussières présentant une teneur inférieure à la valeur seuil; les poussières séparées sont soumises à un traitement d'enrichissement au moins en ce qui concerne le métal détecté, permettant de former une partie des poussières séparées présentant une forte teneur en métal détecté et une partie présentant une teneur faible en métal détecté, inférieure à la valeur seuil; la partie des poussières présentant une faible valeur en métal détecté est acheminée vers le processus métallurgique, tandis que la partie des poussières présentant une forte teneur en métal détecté est acheminée vers un étage de valorisation de ce métal. Une installation pour mettre en oeuvre ledit procédé, comprend une cuve métallurgique (1), une unité d'épuration d'effluents gazeux (2, 3), une unité d'analyse (4) pour mesurer la teneur en zinc, une unité de séparation (5) pour séparer les poussières, une unité de traitement (11) pour enrichir le zinc, une unité de transport (14) pour le retour des poussières traitées et une conduite de retour (6) avec une unité de compression (6') pour le retour des poussières non traitées.
PCT/AT1997/000152 1996-07-10 1997-07-07 Procede de valorisation de poussieres produites lors de processus metallurgiques, telles que des poussieres de convertisseur d'acierie contenant du zinc WO1998001590A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97929014A EP0910678A1 (fr) 1996-07-10 1997-07-07 Procede de valorisation de poussieres produites lors de processus metallurgiques, telles que des poussieres de convertisseur d'acierie contenant du zinc

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0122496A AT405528B (de) 1996-07-10 1996-07-10 Verfahren zum verwerten von bei metallurgischen prozessen anfallenden stäuben
ATA1224/96 1996-07-10

Publications (1)

Publication Number Publication Date
WO1998001590A1 true WO1998001590A1 (fr) 1998-01-15

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PCT/AT1997/000152 WO1998001590A1 (fr) 1996-07-10 1997-07-07 Procede de valorisation de poussieres produites lors de processus metallurgiques, telles que des poussieres de convertisseur d'acierie contenant du zinc

Country Status (3)

Country Link
EP (1) EP0910678A1 (fr)
AT (1) AT405528B (fr)
WO (1) WO1998001590A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19911168A1 (de) * 1999-03-12 2000-09-14 Abb Patent Gmbh Verfahren und Anordnung zur Behandlung von chloridhaltigem Staub
WO2012032256A1 (fr) 2010-09-06 2012-03-15 Associates Researchers And Engineers Procede de valorisation de poussieres d'acieries electriques
RU2509815C1 (ru) * 2012-07-31 2014-03-20 Открытое Акционерное Общество "Челябинский цинковый завод" Шихта для вельцевания цинксвинецоловосодержащих материалов
WO2014044992A1 (fr) 2012-09-24 2014-03-27 Mine & Ore Procede de traitement pyrometallurgique des poussieres d'acierie issues de la fusion de ferrailles de recuperation
WO2014044993A1 (fr) 2012-09-24 2014-03-27 Mine & Ore Procede de traitement hydrometallurgique des poussieres d'acierie issues de la fusion de ferrailles de recuperation
CN109280736A (zh) * 2018-11-30 2019-01-29 天津正元合科技开发有限公司 一种转炉汽化冷却新工艺
CN114309020A (zh) * 2022-01-04 2022-04-12 重庆赛迪热工环保工程技术有限公司 一种冶金含锌尘泥渣的火法分时处置方法

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FR2497235A1 (fr) * 1980-12-26 1982-07-02 Usinor Procede de valorisation des poussieres produites par un four a arc lors de l'elaboration d'acier a partir de ferrailles et installation pour sa mise en oeuvre
EP0174641A2 (fr) * 1984-09-11 1986-03-19 Sumitomo Heavy Industries, Ltd Procédé de récupération de métaux à partir de poussières de fer présentant une haute teneur en zinc
EP0336923A2 (fr) * 1988-04-08 1989-10-11 Voest-Alpine Stahl Donawitz Gesellschaft M.B.H. Procédé de valorisation de poussières et de boues industrielles zincifères

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FR2317363A1 (fr) * 1975-07-11 1977-02-04 Siderurgie Fse Inst Rech Procede pour recuperer un produit riche en zinc a partir des poussieres d'usines siderurgiques
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AT388390B (de) * 1987-11-12 1989-06-12 Voest Alpine Ag Verfahren zum entzinken des materialflusses beim betrieb einer anlage zur roheisenerzeugung
CH677195A5 (fr) * 1989-02-09 1991-04-30 Fischer Ag Georg
US4963182A (en) * 1989-03-14 1990-10-16 Zia Technology, Inc. Continuous feed shaft retort process for recovery of non-ferrous metals from process dust

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FR2497235A1 (fr) * 1980-12-26 1982-07-02 Usinor Procede de valorisation des poussieres produites par un four a arc lors de l'elaboration d'acier a partir de ferrailles et installation pour sa mise en oeuvre
EP0174641A2 (fr) * 1984-09-11 1986-03-19 Sumitomo Heavy Industries, Ltd Procédé de récupération de métaux à partir de poussières de fer présentant une haute teneur en zinc
EP0336923A2 (fr) * 1988-04-08 1989-10-11 Voest-Alpine Stahl Donawitz Gesellschaft M.B.H. Procédé de valorisation de poussières et de boues industrielles zincifères

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N. YAMAMOTO ET AL.: "Fundamental study on recycling technology of zinc-containing dusts in steel works", REVUE DE MÉTALLURGIE, vol. 91, no. 4, April 1994 (1994-04-01), PARIS, FR, pages 633 - 638, XP000449413 *
PFLIPSEN H.D. ET AL.: "Einsatz aufbereiteter Prozessstäube in den TBM-Konvertern der Thyssen Stahl AG", STAHL UND EISEN, DÜSSELDORF, DE, vol. 109, no. 7, 10 April 1989 (1989-04-10), pages 350 - 354, XP000023545 *
TADAHIRO INAZUMI ET AL.: "Recycling of ld converter sludge and iron-bearing fines using the NCP cold-bond-pellet process", CONSERVATION AND RECYCLING, vol. 6, no. 4, 1983, OXFORD, GB, pages 167 - 179, XP002045280 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19911168A1 (de) * 1999-03-12 2000-09-14 Abb Patent Gmbh Verfahren und Anordnung zur Behandlung von chloridhaltigem Staub
WO2012032256A1 (fr) 2010-09-06 2012-03-15 Associates Researchers And Engineers Procede de valorisation de poussieres d'acieries electriques
RU2509815C1 (ru) * 2012-07-31 2014-03-20 Открытое Акционерное Общество "Челябинский цинковый завод" Шихта для вельцевания цинксвинецоловосодержащих материалов
WO2014044992A1 (fr) 2012-09-24 2014-03-27 Mine & Ore Procede de traitement pyrometallurgique des poussieres d'acierie issues de la fusion de ferrailles de recuperation
WO2014044993A1 (fr) 2012-09-24 2014-03-27 Mine & Ore Procede de traitement hydrometallurgique des poussieres d'acierie issues de la fusion de ferrailles de recuperation
CN109280736A (zh) * 2018-11-30 2019-01-29 天津正元合科技开发有限公司 一种转炉汽化冷却新工艺
CN114309020A (zh) * 2022-01-04 2022-04-12 重庆赛迪热工环保工程技术有限公司 一种冶金含锌尘泥渣的火法分时处置方法
CN114309020B (zh) * 2022-01-04 2023-06-13 重庆赛迪热工环保工程技术有限公司 一种冶金含锌尘泥渣的火法分时处置方法

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Publication number Publication date
EP0910678A1 (fr) 1999-04-28
ATA122496A (de) 1999-01-15
AT405528B (de) 1999-09-27

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