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WO2024172686A1 - Procédé de retraitement pyro-métallurgique de minerais et de concentrés sulfurés - Google Patents

Procédé de retraitement pyro-métallurgique de minerais et de concentrés sulfurés Download PDF

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Publication number
WO2024172686A1
WO2024172686A1 PCT/RU2023/000215 RU2023000215W WO2024172686A1 WO 2024172686 A1 WO2024172686 A1 WO 2024172686A1 RU 2023000215 W RU2023000215 W RU 2023000215W WO 2024172686 A1 WO2024172686 A1 WO 2024172686A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
matte
concentrates
chamber
smelting
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/RU2023/000215
Other languages
English (en)
Russian (ru)
Inventor
Борис Михайлович ЛАПШИН
Александр Александрович СМИРНОВ
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.)
"the Innovation Co Intechprom" LLC
Original Assignee
"the Innovation Co Intechprom" LLC
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
Priority claimed from RU2023103397A external-priority patent/RU2817274C1/ru
Application filed by "the Innovation Co Intechprom" LLC filed Critical "the Innovation Co Intechprom" LLC
Publication of WO2024172686A1 publication Critical patent/WO2024172686A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C22B11/00—Obtaining noble metals
    • C22B11/02—Obtaining noble metals by dry processes
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • C22B15/0041—Bath smelting or converting in converters
    • 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
    • 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 the field of pyrometallurgical processing of sulfur-containing ore raw materials with the associated extraction of valuable metals from metal-containing waste of various material compositions in a liquid slag bath, in particular, to a method for the continuous smelting of sulfide materials.
  • a method for the continuous smelting of sulphide materials in a liquid slag bath which consists of processing sulphide materials by bubbling oxidising gases in a furnace consisting of a rectangular shaft, a caisson belt with tuyeres, a device for loading the charge, and devices for discharging slag and matte (see USSR Author's Certificate No. 813102, IPC F 27 B 3/00; Author's Certificate No. 1316317, cl. F 27 B 17/00).
  • the disadvantage of this method is the melting of the charge due to the heat from burning excess sulfur and, as a result, the production of exhaust gases with a high content of sulfur oxides and sublimates in the form of arsenic and antimony compounds, which significantly complicates and increases the cost of gas purification.
  • the known method is ineffective for a more complete separation of the matte phase from the slag.
  • joint processing of sulfide ore concentrate with waste containing valuable metals is significantly limited.
  • a method and device for continuous melting of sulphide materials in a gas-lift mode in a liquid slag bath containing a gas-lift with tuyeres, organizing ascending and descending flows of slag melt, a settling chamber communicating with the gas-lift via the slag phase, and devices for discharging slag and matte (Patent of the Russian Federation No. 2123651 (1.3) class C16F27B17/00, 1997).
  • the gas lift furnace is more productive, but it does not solve the problems of reducing sulfur oxides from the exhaust gases and mixing them with sublimations of arsenic compounds and other elements.
  • the known method does not solve the problems of reducing the carryover of matte with slag, which also limits joint processing of the main batch with valuable metal-containing waste of various material compositions.
  • the furnace known from the prototype includes a gas lift with tuyeres immersed in the slag melt, a gas separation and settling chamber, a gas duct for removing sublimates and low-boiling products of smelting from the settling chamber, a melting chamber immersed in the settling chamber at the slag-matte phase boundary.
  • the objective of the invention is to develop a method for pyrometallurgical processing of sulphide ores and concentrates, which allows for an increase in the extraction of valuable components into matte, a reduction in the content of valuable components in slag to waste values, and an expansion of the scope of application of the method due to the joint processing of the main charge with valuable metal-containing waste.
  • of different material composition eliminating the circulation of slag through the melting chamber and organizing the interaction of blast gases with sulfide sulfur during the simultaneous melting of the charge and the separation of sublimates and low-melting products of melting from the blast gases.
  • the technical result achieved in this way consists of increasing the degree of extraction of valuable components into matte or metal with a significant reduction in their retention in slag.
  • the method of pyrometallurgical processing of sulphide ores and concentrates includes smelting sulphide ores and concentrates in a slag melt together with valuable metal-containing waste in a fenced-off smelting chamber with the production of melts, metal, matte and slag, wherein the smelting of sulphide ores and concentrates with the production of metal, matte and slag is carried out with the continuous return of the matte melt to the slag melt.
  • the method of pyrometallurgical processing of sulphide ores and concentrates includes smelting of sulphide ores and concentrates in a slag melt in a fenced (separated by partitions) a smelting chamber to produce molten matte and slag, whereby the smelting of sulphide ores and concentrates to produce matte and slag is carried out with the continuous return of the molten matte to the molten slag.
  • the method is carried out in a furnace containing a bath (1) in which a gas lift chamber (2) with tuyeres (12) filled with molten matte, into which the tuyeres (12) are immersed, a melting chamber (3), a settling chamber (4) and a light phase drain pocket are sequentially located and separated from each other by partitions (13, 15).
  • the settling chamber (4) there is a gas separation chamber with a gas duct (6) for removing sublimates and low-boiling products of smelting.
  • gas lift (2) and melting (3) chambers there is a gas separation chamber with a gas duct (5) for removing gases from the gas lift chamber (2).
  • Polarized electrodes (8) are installed in the settling chamber (4).
  • a channel (15) is made for removing the gas phase from the light phase drain pocket.
  • a loading channel (11) is made in the side wall of the bath (1).
  • a partition (14) is made to remove gases from the gas lift chamber (2).
  • a siphon (10) is made for draining the metal phase
  • a slag drain nipple (8) and a siphon (9) for draining the matte are made.
  • Pyrometallurgical processing of metal-containing waste (waste from beneficiation plants, waste from jewelry enterprises, electronic scrap, pyrite with inclusions of silver and gold, used electrical wiring, as well as other waste containing valuable metals) together with sulphide ores or their concentrates and concentrates of process waste in the form of a combined charge using a furnace is carried out as follows.
  • the required amount of metal phase, then molten matte and then molten slag are poured into the melting chamber (3) through the loading channel (11).
  • the volume of metal phase, molten matte and molten slag is calculated from design solutions in order to create a volume ratio of molten matte to molten slag of at least 3:1.
  • neutral blast gases are fed into the gas-lift chamber (2).
  • controlled circulation of the molten matte begins between the settling, then gas-lift chamber (2) and the melting chamber (3), located between the partition dividing the gas-lift chamber (2) and the melting chamber (3), and the partition (13) dividing the melting chamber (3) and the settling chamber (4), as a result of which the return of the molten matte to the molten slag in the melting chamber is ensured.
  • the final heating of the furnace to operating temperatures and further maintenance of the temperature parameters of the furnace operation is carried out without loading the charge by applying voltage to the polarized electrodes 7, which are fixed in the upper wall of the bath (1) and immersed in the molten slag.
  • the main mass of the charge (sulfide concentrate with fluxing additives)
  • the volume of the dosed charge is determined based on the excess heat brought by the circulating matte into the melting chamber (3), which is necessary for melting the charge, decomposing higher sulfides and distilling off sublimates while maintaining the liquid slag bath.
  • neutral blast gases are fed into the matte melt layer using tuyeres (12)
  • a foam-liquid phase is formed, which, due to the formed flow of neutral blast gases from the gas-lift chamber (2), enters the gas separation chamber located above the gas-lift (2) and melting (3) chambers, where the foam-liquid phase is stratified into gaseous and liquid phases.
  • the gaseous phase through the gas duct
  • the slag phase clarified in the settling chamber (4) is directed to the light phase drain pocket formed by a partition (16) separating the said pocket and the settling chamber (4), and is then drained through the slag drain nipple (8).
  • a channel (15) is made in the partition (16) for removing the gas phase from the light fraction drain pocket.
  • the metal phase formed in the technological process is removed from the furnace through a siphon (10) for draining the metal phase. Excessive amount of molten matte is removed from the furnace through the siphon (9) for draining the matte.
  • the mixture of matte-slag liquid and liquid slag emulsion in matte obtained as a result of melting the charge in the melting chamber (3) and decomposition of higher sulfides is stratified due to the difference in densities and mutual immiscibility of the matte and slag into slag and matte (sulfide) phases in the settling chamber (4).
  • a clarified slag phase is formed without the inclusion of the matte phase.
  • the capture of slag by the matte does not affect the quality of the matte, since its slag component is again returned to the technological process with the circulating matte, therefore, the degree of extraction of valuable components in the matte increases and their content in the slag decreases.
  • the elimination of slag recirculation reduces the load on the settling chamber and thereby increases the settling time of the slag phase, which, like the above-described processes, contributes to a reduction in the yield of valuable components in waste products and an increase in their yield in target products.
  • - processing of sulphide concentrates can be carried out with partial separation of elemental sulphur during thermal decomposition of higher sulphides during smelting using neutral or oxidising gases with a controlled oxidising agent content;
  • Another possible way to reduce sulphur dioxide formation in exhaust gases is to introduce calcium dioxide as a fluxing additive.
  • the gas-lift process should be organized using a neutral carrier gas.
  • Calcium sulfide is soluble in slag and is removed from the technological process together with it.
  • the technical result is achieved due to the fact that when the gas lift chamber is immersed in the matte melt, the blast gases interact with the sulfide sulfur with simultaneous recycling of the matte through the melting chamber.
  • Melting in a furnace is carried out by treating the charge with a superheated matte melt to form an emulsion of slag in matte, which, when stratified, forms a “pure” slag phase without the inclusion of matte.
  • the composition of the resulting matte was determined by the content of sulfide sulfur in the batch.
  • the volume of circulating matte was determined by creating a matte-slag ratio in the gas lift and smelting zones of at least 3: 1. Both matte and metallic copper formed during processing were used as a co-precipitator for gold and arsenic.
  • the slag yield from the batch was 60.98% (3.65 kg).
  • Waste matte composition % by determined elements: iron - 57.7; arsenic - 0.2%; copper - 0.06; zinc - 0.15; lead - 0.6; sulfur 22.3 other 18;99 gold - 0.05 g / t.
  • the yield of metallic copper alloy kg - 1.04 with a gold content of 300 g/t. From the above it follows that in the process of smelting according to the proposed method in the claimed device, waste slag and matte with a low content of copper and gold are obtained.

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

Abstract

L'invention se rapporte au domaine du retraitement pyro-métallurgique de minerais bruts ayant diverses compositions en termes de substances dans un bain de laitier liquide, et concerne notamment un procédé du fusion continue de matériaux sulfurés. Le résultat technique consiste en une augmentation du taux d'extraction de composants précieux en matte, et une diminution de leur contenu dans le laitier. Ce procédé de retraitement pyro-métallurgique de minerais et de concentrés sulfurés consiste à faire fondre les minerais et concentrés sulfurés de laitier en fusion dans une chambre de fusion close afin de produire un bain de fusion de matte et de laitier; la fusion de minerais et concentrés sulfurés permettant de produire de la matte et du laitier se fait en retournant en continu la matte en fusion et le laitier en fusion.
PCT/RU2023/000215 2023-02-15 2023-07-13 Procédé de retraitement pyro-métallurgique de minerais et de concentrés sulfurés Ceased WO2024172686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2023103397A RU2817274C1 (ru) 2023-02-15 Устройство пирометаллургической переработки сульфидных руд и концентратов
RU2023103397 2023-02-15

Publications (1)

Publication Number Publication Date
WO2024172686A1 true WO2024172686A1 (fr) 2024-08-22

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU813102A1 (ru) * 1977-01-21 1981-03-15 Специальное Конструкторское Бюроминистерства Цветной Металлургииказахской Ccp Печь дл непрерывной плавки сульфидныхМАТЕРиАлОВ B жидКОй BAHHE
EP0266975A1 (fr) * 1986-11-06 1988-05-11 The University Of Birmingham Procédé de réduction en bain de fusion
SU1801194A1 (en) * 1991-02-21 1993-03-07 Mikhail G Vasilev Furnace for continuous processing charge materials
SU1830223A3 (ru) * 1989-07-06 1996-04-27 Сибирский государственный проектный и научно-исследовательский институт цветной металлургии Печь для непрерывной плавки шихтовых материалов в жидкой ванне
RU2060286C1 (ru) * 1994-04-22 1996-05-20 Станислав Сергеевич Паршин Способ плавки в расплаве сульфидных материалов
RU2336355C2 (ru) * 2006-07-31 2008-10-20 Общество С Ограниченной Ответственностью Промышленная Компания "Технология Металлов" Способ выплавки ферроникеля из окисленных никелевых руд и продуктов их обогащения и агрегат для его осуществления
RU126811U1 (ru) * 2012-09-21 2013-04-10 Закрытое акционерное общество Инновационная компания "Интехпром" Печь для непрерывной переработки материалов в жидкой ванне

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU813102A1 (ru) * 1977-01-21 1981-03-15 Специальное Конструкторское Бюроминистерства Цветной Металлургииказахской Ccp Печь дл непрерывной плавки сульфидныхМАТЕРиАлОВ B жидКОй BAHHE
EP0266975A1 (fr) * 1986-11-06 1988-05-11 The University Of Birmingham Procédé de réduction en bain de fusion
SU1830223A3 (ru) * 1989-07-06 1996-04-27 Сибирский государственный проектный и научно-исследовательский институт цветной металлургии Печь для непрерывной плавки шихтовых материалов в жидкой ванне
SU1801194A1 (en) * 1991-02-21 1993-03-07 Mikhail G Vasilev Furnace for continuous processing charge materials
RU2060286C1 (ru) * 1994-04-22 1996-05-20 Станислав Сергеевич Паршин Способ плавки в расплаве сульфидных материалов
RU2336355C2 (ru) * 2006-07-31 2008-10-20 Общество С Ограниченной Ответственностью Промышленная Компания "Технология Металлов" Способ выплавки ферроникеля из окисленных никелевых руд и продуктов их обогащения и агрегат для его осуществления
RU126811U1 (ru) * 2012-09-21 2013-04-10 Закрытое акционерное общество Инновационная компания "Интехпром" Печь для непрерывной переработки материалов в жидкой ванне

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LIAO JINFA, TAN KEQIN, ZHAO BAOJUN: "Enhanced Productivity of Bottom-Blowing Copper-Smelting Process Using Plume Eye", METALS, M D P I AG, CH, vol. 13, no. 2, CH , pages 217, XP093204305, ISSN: 2075-4701, DOI: 10.3390/met13020217 *

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