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EP4573227A1 - Procédé de récupération de métaux à partir de déchets métallurgiques - Google Patents

Procédé de récupération de métaux à partir de déchets métallurgiques

Info

Publication number
EP4573227A1
EP4573227A1 EP23757712.7A EP23757712A EP4573227A1 EP 4573227 A1 EP4573227 A1 EP 4573227A1 EP 23757712 A EP23757712 A EP 23757712A EP 4573227 A1 EP4573227 A1 EP 4573227A1
Authority
EP
European Patent Office
Prior art keywords
zinc
furnace
iron
dust
directed
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.)
Pending
Application number
EP23757712.7A
Other languages
German (de)
English (en)
Inventor
Artur Hutny
Marek Warzecha
Grzegorz Stradomski
Stanis aw MA ECKI
Krzysztof Gargul
Piotr Jarosz
Micha DOBRZY SKI
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.)
PPHU "stilmar" Michal Dobrzynski
Original Assignee
PPHU "stilmar" Michal Dobrzynski
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 PPHU "stilmar" Michal Dobrzynski filed Critical PPHU "stilmar" Michal Dobrzynski
Publication of EP4573227A1 publication Critical patent/EP4573227A1/fr
Pending legal-status Critical Current

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/10—Making pig-iron other than in blast furnaces in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/02—General features in the manufacture of pig-iron by applying additives, e.g. fluxing agents
    • 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
    • C21C5/527—Charging of the electric 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
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
    • 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
    • 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
    • C22B19/34—Obtaining zinc oxide
    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • 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
    • C21C2200/00—Recycling of waste material
    • 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 object of the invention is a method of recovering metals from metallurgical waste, especially zinc and iron from a mixture of dust from iron and steel metallurgy.
  • a method of recovering zinc from zinc-containing materials is known from Polish patent application No. P.288418.
  • the invention relates to a method of recovering zinc from zinc-containing materials, particularly from dusts recovered from waste gases from metallurgical smelting processes.
  • Zinc-containing material particles are subjected to agglomeration with a carbon-based reducing material and, advantageously, also a flux, and are delivered to a gas-tight electro thermal furnace having a bath maintained in a temperature range between 1200 and 1700°C, in which the agglomerates are melted, subjected to selective reduction and separation of zinc and other readily volatile metals.
  • the inert slag phase and, advantageously, the liquid metal phase are drained from the furnace, while zinc and other readily volatile metals are recovered from the waste gas by condensation.
  • zinc-containing dusts are agglomerated together with a carbonaceous binder, which is cracked at temperatures below 700°C to form soot, and the temperature of the furnace gas atmosphere is maintained above 1000°C to keep the volume ratio of CO 2 and CO in the furnace gas atmosphere below 0.3.
  • a method of obtaining zinc oxide and an installation for obtaining zinc oxide are known from Polish patent No. Pat.174046.
  • the method for obtaining zinc oxide is based on introducing into a short rotary furnace, in countercurrent portions, zinc-bearing metallic waste of fine-grained, medium-grained and coarse-grained in weight proportions of 0:2 to 1:3 to 5:9, respectively.
  • the installation has a short rotary kiln and a swing kiln, connected to a post-combustion chamber and is equipped with a dedusting system consisting of a settling chamber, an inert chamber and a filter.
  • the installation has combined air-water cooling systems.
  • a method for the recovery of metals, particularly zinc, lead and cadmium from zinc and lead smelting slags is known from Polish patent application No. P.314353.
  • the method for the recovery of zinc, lead and cadmium from the slags of zinc and lead metallurgy consists in high temperature reduction and elimination to volatile dust of Zn, Pb and Cd.
  • Slags with a composition of 3-15% zinc by weight, 1-6% lead by weight, 0.003-0.12% cadmium by weight are introduced into an arc furnace, followed by high-temperature reduction using the coke in the slags, maintaining the temperature above 1400°C.
  • the process thus carried out results in obtaining a slabs containing 50-60% zinc, 8-15% lead, 0.1-0.35% cadmium, a metallic-sulphide phase and waste slags in glassy form.
  • the briquettes are agglomerated in a shaft furnace for at least 20 min, at a temperature of 1100 - 1200°C, maintaining a reducing atmosphere in the furnace chamber and a vacuum of 10 to 30 Pa, ensuring that the air-fume mixture is blown with an oxygen content of at least 10% by volume.
  • zinc oxide is separated in at least two consecutive stages: on the first stage at 800 to 300°C in a recuperation and dedusting column, a first, coarse fraction (B) of the combustion products deposited in the cyclone funnel of this column is precipitated, and on the second stage at 300 to 100°C in a filter node, a second, final fraction (A) containing essentially pure zinc oxide is separated.
  • the aim of the invention was to develop a technology allowing the recovery of zinc and iron alloys from low-zinc-content metallurgical dusts as low as 2 % and at the same time to obtain a steel melting charge with reduced copper content and environmentally safe slag waste with energy efficiency.
  • a method for the recovery of metals from metallurgical wastes according to the invention, and in particular zinc and iron from dusts consists in the fact that a mixture of steelmaking dusts and other dusts from the iron and steel industry, with a zinc content in the range of 2-40% and an iron content in the range of 10-65%, undergoes a granulation process with the addition of a reductant in the amount of 7-25% by weight of the dust being granulated, depending on the amount of zinc and iron oxides in the dusts, until a homogeneous material is obtained.
  • the material prepared in this way is introduced into an electric arc-resistive furnace in an integrated metallurgical unit, and melted in a continuous or semi-continuous process at temperatures between 1350°C and 1600°C, bringing about the reduction of zinc and iron oxides with the precipitated zinc being driven off in gaseous form, followed by its oxidation in the air stream. Then, the gas phase is dedusted in two stages. In the first stage, the gases are introduced into the pre-dusting chamber, from where the coarser dust fractions are collected and directed back to the arc-resistive furnace. In the second stage, the gases downstream of the pre-dusting chamber are cooled to below 200°C and directed to bag filters from where the dusty zinc oxide is collected.
  • the resulting iron alloy and waste slag are drained from the furnace.
  • the iron alloy containing elevated carbon content is introduced in an integrated metallurgical unit, into an induction or arc furnace, where it is modified, with the removal of excess carbon, sulphur and phosphorus, and the addition of steel scrap or alloying additives.

Landscapes

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

Abstract

La présente invention concerne un procédé de récupération de métaux à partir de déchets métallurgiques, en particulier de zinc et de fer à partir de poussières, qui est caractérisé en ce que les poussières comportant du zinc sont granulées par ajout d'un agent réducteur (poussière de charbon, carboniseur, cendres volantes) en une quantité de 7 à 25 % en poids de la charge comportant des métaux et le matériau ainsi préparé est transféré vers un four résistant aux arcs électriques où il est fondu à une température de 1350 à 1600 °C, les processus de réduction des oxydes de zinc et de fer se produisant simultanément, après quoi le zinc sous forme gazeuse est extrait et oxydé dans le flux d'air, puis un dépoussiérage en deux étapes de la phase gazeuse est effectué, dans lequel des fractions de poussière plus grossières sont collectées dans la chambre de prédépoussiérage et renvoyées au processus, en outre, dans le système de dépoussiérage, les gaz sont refroidis au-dessous de 200 °C et dirigés vers des filtres à sacs pour la capture et la récupération d'oxyde de zinc sous la forme de poussière fine, tandis qu'un alliage de fer et un laitier de déchets sont drainés à partir de celui-ci, après quoi l'alliage ferreux est dirigé vers un four à induction ou à arc, sa composition chimique étant modifiée par élimination de l'excès de carbone, de soufre et de phosphore et par ajout d'un rebut d'acier ou d'additifs d'alliage à un alliage commercial.
EP23757712.7A 2022-07-08 2023-07-05 Procédé de récupération de métaux à partir de déchets métallurgiques Pending EP4573227A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL441677A PL441677A1 (pl) 2022-07-08 2022-07-08 Sposób odzysku metali z odpadów pohutniczych
PCT/PL2023/050050 WO2024010474A1 (fr) 2022-07-08 2023-07-05 Procédé de récupération de métaux à partir de déchets métallurgiques

Publications (1)

Publication Number Publication Date
EP4573227A1 true EP4573227A1 (fr) 2025-06-25

Family

ID=87747957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23757712.7A Pending EP4573227A1 (fr) 2022-07-08 2023-07-05 Procédé de récupération de métaux à partir de déchets métallurgiques

Country Status (3)

Country Link
EP (1) EP4573227A1 (fr)
PL (1) PL441677A1 (fr)
WO (1) WO2024010474A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL125831B1 (en) 1980-07-11 1983-06-30 Os Bad Rozwojowy Przem Barwni Colouring agent for dyeing articles made of blend of polyamide and cellulosic fibres
NO170032C (no) 1989-12-22 1992-09-02 Elkem Technology Fremgangsmaate ved gjenvinning av sink fra sink-holdige avfallsstoffer.
NL9400936A (nl) * 1994-06-09 1996-01-02 Hoogovens Groep Bv Werkwijze voor het behandelen van zinkhoudend stof.
PL174046B1 (pl) 1994-07-22 1998-06-30 Inst Metali Niezelaznych Sposób otrzymywania tlenku cynku i instalacja do otrzymywania tlenku cynku
KR100210649B1 (ko) * 1996-04-01 1999-07-15 야마오카 요지로 더스트로부터 산화아연을 회수하는 방법 및 그 장치
PL314353A1 (en) 1996-05-17 1997-11-24 Akad Gorniczo Hutnicza Method of recovering metals, in particular zinc, lead and cadmium, from zinc and lead metallurgy slags
AT405054B (de) * 1997-06-18 1999-05-25 Voest Alpine Ind Anlagen Verfahren und anlage zum herstellen einer eisenschmelze unter einsatz von eisenhältigen hüttenwerksreststoffen
TW495552B (en) * 1997-12-18 2002-07-21 Kobe Steel Ltd Method of producing reduced iron pellets
WO2010023691A1 (fr) * 2008-08-30 2010-03-04 Tata Steel Limited Procédé de séparation de zinc et d'extraction de fer dans des minerais de fer à haute teneur en zinc
RU2626371C1 (ru) * 2016-09-05 2017-07-26 Общество с ограниченной ответственностью "Урал - рециклинг" Способ переработки отходов металлургического производства
AU2016253551A1 (en) * 2016-11-01 2018-05-17 Austpac Resources N.L. Processing of zinc-containing waste materials
GB2578275A (en) * 2018-07-27 2020-05-06 British Steel Ltd Agglomerate for use in iron-making and/or steel-making

Also Published As

Publication number Publication date
PL441677A1 (pl) 2024-01-15
WO2024010474A1 (fr) 2024-01-11

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