WO2015185457A1 - Procédé et installation pour le traitement du minerai de nickel latéritique - Google Patents

Procédé et installation pour le traitement du minerai de nickel latéritique Download PDF

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Publication number
WO2015185457A1
WO2015185457A1 PCT/EP2015/061989 EP2015061989W WO2015185457A1 WO 2015185457 A1 WO2015185457 A1 WO 2015185457A1 EP 2015061989 W EP2015061989 W EP 2015061989W WO 2015185457 A1 WO2015185457 A1 WO 2015185457A1
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WO
WIPO (PCT)
Prior art keywords
nickel
coarse fraction
fraction
nickel ore
ore
Prior art date
Application number
PCT/EP2015/061989
Other languages
German (de)
English (en)
Inventor
Guido Grund
Andreas Hoppe
Original Assignee
Thyssenkrupp Industrial Solutions Ag
Thyssenkrupp Ag
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 Thyssenkrupp Industrial Solutions Ag, Thyssenkrupp Ag filed Critical Thyssenkrupp Industrial Solutions Ag
Publication of WO2015185457A1 publication Critical patent/WO2015185457A1/fr

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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
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/007—Disintegrating plant with or without drying of the material using a combination of two or more drum or tube mills

Definitions

  • the invention relates to a method for processing lateritic nickel ore, wherein at least one nickel-containing substance is separated from the nickel ore.
  • the invention further relates to a system for carrying out such a method.
  • Nickel is obtained either from sulfidic or lateritic nickel ores. The majority of the world's known nickel deposits are in the form of lateritic nickel ores.
  • the nickel content of the ore should be at least 0.5% by weight.
  • Sulphidic nickel ores were formed by magmatic processes. Lateritic nickel ores were formed by weathering of nickeliferous rocks. The chemical properties of the lateritic nickel ores, which are characteristic of each deposit, are influenced by the historical process of weathering and the composition of the rocks.
  • lateritic nickel ore deposits consist of a top layer, a limonite layer, a transition layer, and an underlying saprolitic layer. At least part of the nickel ore deposits also contain gait, ie fractions containing low levels of nickel or containing no nickel. At least part, possibly also the majority of the nickel is contained in the limonite ore fraction, which is comparatively rich in iron and nickel and low in magnesium and quartz.
  • the nickel is usually bound in the form of iron oxide minerals, such as goethite, chromite and complex manganese oxides. Limonite ore fractions are usually rich in cobalt and have a relatively high level of free moisture, resulting in a doughy consistency with sometimes even thixotropic behavior.
  • the separation of iron and nickel is more complete, the nickel in the form of silicates with a fairly high proportion of magnesia, such as serpentine, garnierite, nontronite, kaolinite or Magnesite, present. These minerals have less free moisture and are more abrasive than the minerals contained in the limonite ore fraction.
  • magnesia such as serpentine, garnierite, nontronite, kaolinite or Magnesite
  • NST New Smelting Technology
  • NPI Nickel Pig Iran
  • NBM Nickel Base Material
  • the invention is based on the idea that for the highest possible separation rate for the nickel with the lowest possible energy expenditure, the processes for separating nickel or nickel-containing substances from nickel ore should be optimally adapted to the nickel metal ore fractions to be processed, and in particular nickel ore fractions Although they contain nickel or nickel-containing substances, but for the chosen method is not well suited because it can be separated, no or only a small proportion of the nickel, as early as possible to exclude from processing.
  • the energy expenditure for the processing can be kept low because the extracted portion is not further processed.
  • this makes it possible to further process the reclaimed fraction in another process adapted to the properties of this fraction, in order to separate nickel or nickel-containing substances from this fraction with the greatest possible separation rate.
  • a further basic idea of the invention is that for all or at least most of the processes for separating nickel or nickel-containing substances from lateritic nickel ore a comminution process is provided relative to the beginning and that the effect of such comminution is on the one hand the limonitic portion, on the other hand the saprolitic portion of the Lateritic nickel ore, as well as the gait is different, which in particular on the different compositions and ingredients as well as the resulting different consistencies.
  • such a comminution process may be "better" at the softer limonite portion rather than the more hard and abrasive saprolitic portion, which may result in correspondingly different particulate sizes of the comminuted portions, thus enabling the rather large saprolitic particles to be separated relatively easily Separate small limonitic particles of the crushed nickel ore in order to use them separately, as required, as well as gait and saprolitic particles.
  • the method according to the invention for processing lateritic nickel ore comprises at least comminuting the nickel ore and separating the comminuted nickel ore into a fine fraction and a coarse fraction, the fine fraction subsequently being processed separately from the coarse fraction and / or the coarse fraction separately from the fine fraction ( each) to separate at least one nickel-containing substance contained therein.
  • a plant for carrying out such a process comprises at least one comminuting device (eg ball mill or hammer mill) for comminuting the lateritic nickel ore, a separating device for separating the comminuted nickel ore into at least one fine fraction and a coarse fraction, and at least one further processing system for separating at least one nickel-containing substance from either the fines or the coarse fraction.
  • comminuting device eg ball mill or hammer mill
  • a separating device for separating the comminuted nickel ore into at least one fine fraction and a coarse fraction
  • at least one further processing system for separating at least one nickel-containing substance from either the fines or the coarse fraction.
  • the fines which may substantially comprise the limonite portion of the nickel ore, and / or specifically the coarse fraction, which may substantially comprise the saprolitic portion of the nickel ore, to at least one thereof to separate nickel-containing substance.
  • processes adapted to either the limonitic fraction or the saprolitic fraction are preferably used in order to be able to achieve the greatest possible separation rate.
  • the fine fraction which may substantially comprise the saprolitic portion of the nickel ore, be specifically processed further and the coarse fraction, which may substantially comprise the gangue of the nickel ore, be discharged.
  • This other part not intended for further processing (with the aim of separating a nickel-containing substance), on the other hand, can be used in any other way or removed without being used.
  • An essential advantage of the method according to the invention is then the reduced expenditure, in particular energy consumption, for the further processing of the corresponding portion as a result of the amount of the nickel ore to be further processed, which is reduced by the separated portion.
  • the proportion to be rejected should be at least 2%, better still at least 5%, 8%, 10%, 12% or 15%.
  • both fractions may also be advantageous to subject both fractions separately to a preferably optimally matched composition for the separation of the at least one nickel-containing substance in order to maximize the nickel contained in the nickel ore to win completely.
  • a second further processing system for separating at least one nickel-containing substance from the coarse fraction may be provided.
  • any subdivision device for example a screening device, can be provided.
  • the subdivision of the coarse fraction into a non-recoverable, fine coarse fraction and a coarse coarse fraction to be returned can also be effected in or by means of the separation apparatus itself, for which purpose these three outlets may have.
  • the recycled fraction of the coarse fraction is preferably at most 15%, better at most 12%, 10%, 8%, 5% or 2%.
  • Advantageous for the comminution of the nickel ore and / or the separation into a fine fraction and a coarse fraction may be when the comminuted nickel ore is dried before the separation. This can be done both during or parallel to the comminution as well as in advance to it.
  • the plant according to the invention can for this purpose comprise a dryer, in particular a riser dryer, for drying the nickel ore.
  • the dryer is integrated into the comminution device (eg, configuration of the comminution device in a known form as a milling dryer).
  • the integrated part of the dryer can also be a hot gas connection, through which hot gas is introduced into the comminuting device.
  • the hot gas flows through and dries so the crushed or already crushed nickel ore.
  • the flow through the nickel ore by means of the hot gas must not be limited to the crushing device, but can also be done in subsequent system parts, in particular a riser dryer.
  • the hot gas can be generated for example by means of a separate burner of the system.
  • the system according to the invention or a parallel operated system can be used.
  • the absolute humidity (ratio of the mass of water to the total mass) in the crushed nickel ore is at most 25%, better at most 20%, 15%), 10% o, 4% o or at best at most 3%.
  • the fine fraction which substantially comprises the limonitic portion of the nickel ore is preferably further processed by hydrometallurgy. If there is no further processing (with the aim of separating a nickel-containing substance) for the coarse fraction substantially containing the saprolitic portion of the nickel ore, this can be discharged from the process and, for example, landfilled.
  • saprolitic portion of the nickel ore having coarse fraction can be provided that this is further processed pyrometallurgically in order to achieve the greatest possible separation rate in a known manner.
  • the corresponding further processing system of the system according to the invention may comprise a further comminuting device.
  • the separation device of the system according to the invention can advantageously comprise a separator, a cyclone separator and / or a sieve device, the construction and modes of operation of which are well known and which have proven themselves for the separation of bulk materials fed into the mass flow.
  • Fig. 1 a system according to the invention for the processing of lateriticianm
  • Nickel ore in a schematic representation The plant shown in FIG. 1 comprises a material feed e 1, via which lateritic nickel ore is fed to a comminuting device 2.
  • the crushing device 2 is exemplified in the form of a hammer mill.
  • a hot gas connection 3 is provided in the area of the mouth of the material task 1 in the crushing device 2.
  • Hot gas is introduced into the comminution device 2 via this. The hot gas flows through the nickel ore contained in the comminution device 2 before, during and after the comminution and dries this.
  • This throughflow also stops in a dryer 4 adjoining the comminution device 2 in the form of a riser-type dryer.
  • the hot gas simultaneously acts as a carrier fluid through which the comminuted particles of nickel ore are conveyed into the riser dryer and within the riser dryer against gravity.
  • the dryer 4 is followed by a separator 5 in the form of a separator.
  • a separator 5 in the form of a separator.
  • the crushed nickel ore is separated into a fine fraction and a coarse fraction.
  • the fines which essentially comprise the limonite portion of the nickel ore, are conveyed from the separator 5 into a first further processing system 6 and are preferably incorporated therein by means of a hydrometallurgical process, e.g. a "high pressure acid leaching” process, a “pressure acid leaching” process or an “atmospheric leaching” process, processed to separate nickel-containing substances from the fines.
  • a hydrometallurgical process e.g. a "high pressure acid leaching” process, a “pressure acid leaching” process or an “atmospheric leaching” process
  • the coarse fraction which essentially comprises the saprolitic portion of the nickel ore, and which may comprise, for example, between about 5% and 10% of the total nickel ore fed in, can be discharged from the process on the one hand and thus can not be used to obtain nickel-containing materials.
  • the discharged coarse fraction can then be transferred to a landfill 7.
  • hydrometallurgical process is processed, whereby the processing cost and in particular the corresponding energy requirements can be kept low. This can lead to a reduction of the energy consumption for the operation of the entire system by between 5% and 10%.
  • the coarse fraction can also be conveyed to a second further processing system 8, in which by means of a pyrometallurgical process, e.g. a "Rotary Kiln / Electric Furnace” process or the “New Smelting Technology", nickel-containing substances are separated from the coarse fraction.
  • a pyrometallurgical process e.g. a "Rotary Kiln / Electric Furnace” process or the “New Smelting Technology
  • nickel-containing substances are separated from the coarse fraction.
  • the second further processing system 8 may comprise a further comminution device 10, in which the particles of the coarse fraction are further comminuted.
  • the possibility is provided to recycle the coarse fraction of the nickel ore partially or completely via a return line 9 to the material feed 1, in turn, through the comminution device 2, the dryer 4 and the To lead separator 5.
  • the fine fraction which essentially comprises the saprolitic portion of the nickel ore and which is conveyed from the separation device 5 into a first further processing system 6, preferably by means of a pyrometallurgical process, for example a "Rotary Kiln / Electric Furnace” process or "New Smelting Technology", processed to separate nickel-containing substances from the fines.
  • a pyrometallurgical process for example a "Rotary Kiln / Electric Furnace” process or "New Smelting Technology”
  • the discharged coarse fraction can then be transferred to a landfill 7.
  • the coarse fraction is not processed in the context of the process carried out in the first further processing system 6, whereby the processing effort and in particular the corresponding energy requirement can be kept low. This can lead to a reduction of the energy consumption for the operation of the entire system by between 5% and 10%.

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

Abstract

L'invention concerne un procédé de traitement du minerai de nickel latéritique, selon lequel le minerai de nickel est broyé puis séparé en une fraction fine et une fraction grossière. Le procédé est caractérisé en ce que la fraction fine est traitée séparément de la fraction grossière ou seule la fraction fine est traitée dans le but d'en séparer au moins une substance nickélifère.
PCT/EP2015/061989 2014-06-03 2015-05-29 Procédé et installation pour le traitement du minerai de nickel latéritique WO2015185457A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014107787.3A DE102014107787A1 (de) 2014-06-03 2014-06-03 Verfahren und Anlage zur Verarbeitung von lateritischem Nickelerz
DE102014107787.3 2014-06-03

Publications (1)

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WO2015185457A1 true WO2015185457A1 (fr) 2015-12-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107579218A (zh) * 2017-08-23 2018-01-12 中国科学院过程工程研究所 一种由红土镍矿的酸浸出液直接制备镍钴铝三元正极材料前驱体的方法
CN113088723A (zh) * 2021-04-06 2021-07-09 吴家明 一种冶炼红土镍矿的方法及系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107309079A (zh) * 2016-04-26 2017-11-03 上海鑫和镍业科技有限公司 一种处理低品位红土镍矿的方法及其选矿方法

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4044096A (en) * 1975-12-11 1977-08-23 Amax Inc. Sulfuric acid leaching of nickeliferous laterite
AU2006101059A4 (en) * 2005-08-09 2007-02-01 Murrin Murrin Operations Pty Ltd Hydrometallurgical Method for the Extraction of Nickel and Cobalt from Laterite Ores
EP2226403A1 (fr) * 2008-09-18 2010-09-08 Sumitomo Metal Mining Co., Ltd. Procédé de concentration de nickel dans du minerai de saprolite
US20110272508A1 (en) * 2008-11-28 2011-11-10 Damien Krebs Process for Separating Limonite and Saprolite

Family Cites Families (3)

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US3775090A (en) * 1970-10-05 1973-11-27 Sherritt Gordon Mines Ltd Method of preparing laterite ore mixtures for reduction roasting
CA996756A (en) * 1973-07-11 1976-09-14 Verner B. Sefton Process for treating high magnesium nickeliferous laterites and garnierites
CA1002762A (en) * 1973-10-29 1977-01-04 Donald R. Weir Process for treating nickeliferous laterite ore containing limonite and serpentine fractions

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044096A (en) * 1975-12-11 1977-08-23 Amax Inc. Sulfuric acid leaching of nickeliferous laterite
AU2006101059A4 (en) * 2005-08-09 2007-02-01 Murrin Murrin Operations Pty Ltd Hydrometallurgical Method for the Extraction of Nickel and Cobalt from Laterite Ores
EP2226403A1 (fr) * 2008-09-18 2010-09-08 Sumitomo Metal Mining Co., Ltd. Procédé de concentration de nickel dans du minerai de saprolite
US20110272508A1 (en) * 2008-11-28 2011-11-10 Damien Krebs Process for Separating Limonite and Saprolite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KEITH QUAST ET AL: "Preconcentration strategies in the processing of nickel laterite ores Part 1: Literature review", MINERALS ENGINEERING, vol. 79, 2 April 2015 (2015-04-02), pages 261 - 268, XP055203221, ISSN: 0892-6875, DOI: 10.1016/j.mineng.2015.03.017 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107579218A (zh) * 2017-08-23 2018-01-12 中国科学院过程工程研究所 一种由红土镍矿的酸浸出液直接制备镍钴铝三元正极材料前驱体的方法
CN107579218B (zh) * 2017-08-23 2020-04-07 中国科学院过程工程研究所 一种由红土镍矿的酸浸出液直接制备镍钴铝三元正极材料前驱体的方法
CN113088723A (zh) * 2021-04-06 2021-07-09 吴家明 一种冶炼红土镍矿的方法及系统
CN113088723B (zh) * 2021-04-06 2023-04-11 吴家明 一种冶炼红土镍矿的方法及系统

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