WO2006024886A1 - Methode de traitement d'une matiere de charge porteuse de valeur - Google Patents

Methode de traitement d'une matiere de charge porteuse de valeur Download PDF

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Publication number
WO2006024886A1
WO2006024886A1 PCT/IB2004/002812 IB2004002812W WO2006024886A1 WO 2006024886 A1 WO2006024886 A1 WO 2006024886A1 IB 2004002812 W IB2004002812 W IB 2004002812W WO 2006024886 A1 WO2006024886 A1 WO 2006024886A1
Authority
WO
WIPO (PCT)
Prior art keywords
value
performance data
value recovery
crushing
bearing material
Prior art date
Application number
PCT/IB2004/002812
Other languages
English (en)
Inventor
Ian Smit
Jan Tjeerd Smit
Robert Vincent Crosbie
Vilim Ser
Original Assignee
Anglo Operations Limited
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 Anglo Operations Limited filed Critical Anglo Operations Limited
Priority to PCT/IB2004/002812 priority Critical patent/WO2006024886A1/fr
Publication of WO2006024886A1 publication Critical patent/WO2006024886A1/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
    • C22B1/00—Preliminary treatment of ores or scrap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • 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
    • C22B19/02—Preliminary treatment of ores; Preliminary refining of 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
    • 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
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B03D1/028—Control and monitoring of flotation processes; computer models therefor

Definitions

  • THIS invention relates to the processing of value bearing feed materials such as metal ores. More specifically, the invention relates to a method of recovering value from a heterogeneous value bearing material.
  • Comminution processes in the mining industry generally consist of crushing and milling.
  • the milling often takes place in a rotating drum, such as in ball milling in which steel balls are added to the drum to facilitate size reduction of the feed material, or autogenous milling in which size reduction is effected by the tumbling action of the feed material upon itself.
  • size reduction operations take place with the addition of water, which permits the various process streams to be pumped, and which allows for the use of simple, high throughput hydrocyclones for size separation.
  • a method of processing heterogeneous value bearing material comprising the steps of: crushing the value bearing material in a bed of particles while maintaining a bed voidage value of at least 20%; subjecting the crushed material to a value recovery process downstream of the crushing; obtaining performance data from the value recovery process; and using the value recovery performance data to control the crushing of the value bearing material, thereby to liberate the value preferentially from the value bearing material.
  • bed voidage value is meant the difference between the density of the material making up the particle bed, and the density of the particle bed as a whole.
  • a bed voidage value of 20% means that the particle bed comprises 80% feed material and 20% voids.
  • the method includes classifying the value bearing material after at least one cycle of crushing, and recycling a coarse fraction of the classified material for further comminution.
  • the method typically includes removing comminuted feed material having particles smaller than a predetermined size prior to overgrinding thereof to a smaller size.
  • the comminuted feed material is preferably classified after no more than three compression cycles, and most preferably after each compression cycle.
  • the reduction ratio over the comminution step is below 3000.
  • a feed with a top size of say 15 centimeters is not reduced beyond a production top size of 50 micrometers.
  • the classification may be carried out by a cyclone, a dynamic or static air classifier, a screw classifier, or a screening apparatus, with or without the addition of water.
  • the value recovery process may comprise, for example, froth flotation, vat leaching or gravity separation.
  • the value recovery performance data is obtained continuously.
  • the value recovery performance data is obtained intermittently.
  • the value recovery performance data may be obtained by sampling the feed, product and/or tailings streams of the value recovery process, and subsequently subjecting the samples to chemical analysis, X-ray analysis, or fire assay.
  • the method includes the step of subjecting the samples to on ⁇ line analysis, for example by using on-line XRD analysis, on-line XRF analysis, or automated sampling followed by automated, robotic laboratory procedures.
  • the value recovery performance data may be computed manually or automatically. In the latter case, the results may be computed locally, for example by means of a programmable logic controller (PLC), or centrally by means of a plant information system.
  • PLC programmable logic controller
  • the step of using the value recovery performance data to control the crushing of the value bearing material may be effected with the aid of an algorithm, such as an adaptable control algorithm.
  • the algorithm is designed to effect coarsening of the comminution product in response to low value grades, and further comminution in response to low value recovery.
  • the value bearing material may be crushed in a vertical roller mill, a horizontal roller mill, an inertial cone crusher or a high pressure grinding roll, for example.
  • the crushing of the value bearing material may be controlled by changing variables such as the particle bed compression pressure within the crusher; the feed rate, feed size, and/or product size of comminuted material; the classification size set point; the air volume, air velocity, and/or air pressure differentials over the crusher; the intensity of friction between the particle bed and a comminution tool; the particle bed depth within the crusher; the re-circulation rate between the crusher and the classification device; and/or the comminution tool rotational speed.
  • the value bearing materials may include ores of precious metals, base metals, industrial minerals or diamonds.
  • FIG. 1 illustrates, schematically, apparatus for processing heterogeneous value bearing material in accordance with the present invention.
  • Figure 2 is a graph illustrating the relationship between particle size and value recovery.
  • the present invention has particular application in the processing of heterogeneous value bearing materials such as base metal ores, gold ores, platinum ores, diamond ores, metalliferous slags, etc.
  • value bearing feed material is crushed or milled to liberate the value from the feed material, and the value is then recovered from the comminution product in a downstream value recovery process.
  • the present invention relies on value recovery performance data to control the comminution process and hence value liberation. For example, by monitoring the value recovery, the value grade or the reagent consumption at a downstream value recovery process, it can be established when the comminution product fed to the value recovery process is too fine or too course for a given purpose. The comminution process may then be controlled to effect a desired change in the size distribution of the comminution product.
  • the method of the invention may be used to process a heterogeneous value bearing material, for example to recover copper from a mined ore.
  • the mined ore is fed to a grinder or crusher 10 which may be a conventional crusher such as, for example, a Rhodax inertial cone crusher, a high pressure grinding roll (HPGR), a vertical roller mill, a horizontal roller mill, or another comminution device which operates by compressing a bed of particles, in order to reduce the size of the particles in the particle bed, by inter-particle comminution. Since it is desirable for the crusher 10 to respond relatively quickly to required changes in operating parameters, such as compressive stress, conventional large tumbling mills are not suitable for comminution in the process according to the invention.
  • a grinder or crusher 10 which may be a conventional crusher such as, for example, a Rhodax inertial cone crusher, a high pressure grinding roll (HPGR), a vertical roller mill, a horizontal roller mill, or another comminution device which operates by compress
  • a bed voidage value of the comminuted material may be maintained at suitable classification of the feed material prior to compression thereof and after each (or a limited number of) compression cycles.
  • the crusher 10 may be operated in a closed circuit with an external classifier 12 which screens or classifies the comminuted particles frequently, at least after every three compression cycles of the crusher 10, and preferably after every compression cycle. This minimizes the production of ultrafines and assists in maximizing the particle bed voidage value.
  • the classifier 12 may be a mechanical screening device, an air or hydrocyclone, a spiral classifier, an air classifier, or any other suitable classification device. Classifiers which minimize energy consumption are preferred for cost reasons. For high intensity compression/classification comminution, an air drafted vertical roller mill may be operated with an air classifier, or a HPGR may be operated with a separate classifier such as a screen.
  • froth flotation plants are well-known in the art and need not be described in detail for a full understanding of the invention. Generally, however, froth flotation plants include a plurality of flotation cells 16.1 to 16.n which are connected to one another in series.
  • Each cell includes a tank with an inlet for allowing slurry into the tank, an agitator for agitating the slurry and developing a floating froth, a first outlet in an upper region of the tank for allowing the floating froth out of the tank, and a second outlet in a lower region of the tank for allowing the slurry out of the tank. Copper within the slurry is selectively carried with the froth and thus is separated by flotation from the rest of the slurry.
  • the comminuted material may be subjected to a leaching process, for example, by contacting the comminuted material with a leaching solution in stirred vats, pachuca tanks, or an autoclave.
  • the leaching solution typically comprises an aqueous solution of cyanide, sulfuric acid, ammonia, or other commonly used lixiviants.
  • a gravity concentration process could be used for value extraction, such as commonly executed by arrangements of jigs, heavy media cyclones, or enhanced gravity concentrators, such as Knelson or Falcon concentrators. It is desirable that the performance of the value recovery installation be established continuously, or at least on a regular basis, and accordingly processes such as heap or dump leaching, the performance of which cannot be established reliably, and only after considerable effort and extensive time delay, are not suitable.
  • the value recovery performance is used to control comminution in the crusher 10 so as to achieve preferential value liberation for enhanced value recovery and/or improved economic performance.
  • particular performance characteristics of, for example, the value recovery, the value grade and/or the reagent consumption, may be selected, and the operation of the crusher 10 may be controlled by adjusting operating parameters of the crusher in response to changes in value recovery performance.
  • Figure 2 illustrates the relationship between the particle sizes of the comminuted material and value recovery.
  • the value recovery is optimized.
  • a drop in value recovery generally indicates a need for a finer grind, whereas a drop in value grade indicates overgrinding of the gangue.
  • By monitoring the value recovery performance it is possible to determine whether the particle size distribution of the comminuted material is within a desired range or requires adjustment.
  • the operating parameters of the crusher 10 which may be adjusted in response to changes in the value recovery performance include the particle bed compression pressure within the crusher; the feed rate, feed size, and/or product size of comminuted material; the classification size set point; the air volume, air velocity, and/or air pressure differentials over the crusher; the intensity of friction between the particle bed and a comminution tool; the particle bed depth within the crusher; the re-circulation rate between the crusher and the classification device; and/or the comminution tool rotational speed.
  • a conventional sampling device 18 such as, for example, a pressure pipe sampler, a cross current sampler or a shark fin sampler, is used to sample the flotation concentrate, either on a continuous or intermittent basis, and the samples are subjected to chemical analysis, X-ray analysis or fire assay to determine the value recovery performance. Sampling may also occur on the feed or tailings streams, either in addition to or as an alternative to sampling of the flotation concentrate.
  • the sampling may be automated, for example by using on ⁇ line analyzers such as on-line XRD analyzers or on-line XRF analyzers, and the automated sampling may be followed by automated, robotic laboratory procedures.
  • Value recovery performance data may be computed manually or automatically, for example by a programmable logic controller (PLC) or by a plant information system.
  • PLC programmable logic controller
  • the step of using the value recovery performance data to control the crushing of the value bearing material typically is carried out with the aid of an algorithm, such as an adaptable control algorithm.
  • the algorithm may be designed to effect coarsening of the comminution product in response to low value grades, and to effect further comminution in response to low value recovery.
  • a nickel-PGM ore was comminuted in a vertical roller mill (VRM) and subsequently subjected to flotation in accordance with the method of the present invention.
  • Test work was done at a continuous, integrated pilot plant scale, at a feed rate averaging 300 kg/h.
  • the nickel-PGM ore was also comminuted conventionally in a ball mill followed by flotation. Results were follows:
  • the flotation depressant reagent consumption in the process according to the invention was approximately 40% of that required in the conventional process.
  • a zinc/lead ore was comminuted in a vertical roller mill (VRM) and subsequently subjected to flotation in accordance with the method of the present invention.
  • Test work was done at a continuous, integrated pilot plant scale, at a feed rate averaging 500 kg/h.
  • the zinc/lead ore was also comminuted conventionally in a ball mill followed by flotation. The objective in each case was to produce a concentrate containing 48.0% zinc. Results were follows:
  • the value recovery obtained with the process according to the present invention was substantially higher than that obtained in the conventional process.

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

Abstract

L'invention concerne une méthode de traitement d'une matière porteuse de valeur hétérogène. Dans une première étape, la méthode consiste à broyer la matière porteuse de valeur dans un lit de particules, tout en maintenant une valeur de porosité de lit au moins supérieure à 20 %. La matière broyée est ensuite soumise à un procédé de récupération de valeur, en aval du broyage, et des données de performance sont obtenues à partir du procédé de récupération de valeur. Dans une autre étape, la méthode consiste à utiliser les données de performance de récupération de valeur pour contrôler le broyage de la matière porteuse de valeur, ce qui permet de libérer la valeur, de préférence, à partir de la matière porteuse de valeur.
PCT/IB2004/002812 2004-08-31 2004-08-31 Methode de traitement d'une matiere de charge porteuse de valeur WO2006024886A1 (fr)

Priority Applications (1)

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PCT/IB2004/002812 WO2006024886A1 (fr) 2004-08-31 2004-08-31 Methode de traitement d'une matiere de charge porteuse de valeur

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PCT/IB2004/002812 WO2006024886A1 (fr) 2004-08-31 2004-08-31 Methode de traitement d'une matiere de charge porteuse de valeur

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007115377A1 (fr) * 2006-04-11 2007-10-18 Straits Resources Limited Traitement de récupération de l'antimoine et des métaux précieux dans des matériaux contenant de l'antimoine et des métaux précieux
WO2010109191A1 (fr) * 2009-03-27 2010-09-30 The University Of Birmingham Récupération de métaux du groupe platine à partir de déchets pulvérulents
AU2017100575B4 (en) * 2016-02-15 2017-07-27 Uranium Beneficiation Pty Ltd Beneficiation Process For Enhancing Uranium Mineral Processing
AU2017203383A1 (en) * 2016-02-15 2017-07-27 Uranium Beneficiation Pty Ltd Beneficiation process for enhancing uranium mineral processing
WO2017139829A1 (fr) * 2016-02-15 2017-08-24 Uranium Beneficiation Pty Ltd Procédé d'enrichissement pour améliorer le traitement du minerai d'uranium
WO2017195008A1 (fr) * 2016-05-11 2017-11-16 Anglo American Services (Uk) Ltd Réduction du besoin de barrages de stockage de résidus dans la flottation minérale
CN108896590A (zh) * 2018-06-26 2018-11-27 中国矿业大学 研究煤炭混合破碎中各组分破碎行为的方法及系统
CN110433954A (zh) * 2019-06-06 2019-11-12 河南黄金产业技术研究院有限公司 一种金矿石和金废石的富金选矿方法
CN112147298A (zh) * 2020-09-27 2020-12-29 长春黄金研究院有限公司 一种用于火试金混料、熔样、灰吹的自动化操作方法
CN112295703A (zh) * 2019-07-30 2021-02-02 淡水河谷公司 自然湿度下铁矿石或铁矿石产品的粉碎方法
CN114453129A (zh) * 2022-01-13 2022-05-10 湖南有色金属研究院有限责任公司 一种铅锌矿回收利用方法

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Publication number Priority date Publication date Assignee Title
US3094289A (en) * 1959-10-29 1963-06-18 Bolidens Gruv Ab Rock grinding system
SU914086A1 (ru) * 1980-05-15 1982-03-23 Sverdlovsk Gorny Inst Способ автоматического управления замкнутым циклом мокрого измельчения с классификацией в аппаратах гидроциклонного типа 1
JPH02184355A (ja) * 1989-01-09 1990-07-18 Kawasaki Steel Corp 整粒プラントの原料破砕状況検出方法
WO1991008836A1 (fr) * 1989-12-07 1991-06-27 Tarco Vej A/S Procede et appareil de broyage de scories resultant de la production d'acier
US6508421B1 (en) * 1998-04-22 2003-01-21 James Anthony Jude Tumilty Ore comminution process

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Publication number Priority date Publication date Assignee Title
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SU914086A1 (ru) * 1980-05-15 1982-03-23 Sverdlovsk Gorny Inst Способ автоматического управления замкнутым циклом мокрого измельчения с классификацией в аппаратах гидроциклонного типа 1
JPH02184355A (ja) * 1989-01-09 1990-07-18 Kawasaki Steel Corp 整粒プラントの原料破砕状況検出方法
WO1991008836A1 (fr) * 1989-12-07 1991-06-27 Tarco Vej A/S Procede et appareil de broyage de scories resultant de la production d'acier
US6508421B1 (en) * 1998-04-22 2003-01-21 James Anthony Jude Tumilty Ore comminution process

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DATABASE WPI Section PQ Week 198315, Derwent World Patents Index; Class P41, AN 1983-E9739K, XP002324003 *
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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007115377A1 (fr) * 2006-04-11 2007-10-18 Straits Resources Limited Traitement de récupération de l'antimoine et des métaux précieux dans des matériaux contenant de l'antimoine et des métaux précieux
WO2010109191A1 (fr) * 2009-03-27 2010-09-30 The University Of Birmingham Récupération de métaux du groupe platine à partir de déchets pulvérulents
US8662310B2 (en) 2009-03-27 2014-03-04 The University Of Birmingham Platinum group metal recovery from powdery waste
AU2017100575B4 (en) * 2016-02-15 2017-07-27 Uranium Beneficiation Pty Ltd Beneficiation Process For Enhancing Uranium Mineral Processing
AU2017203383A1 (en) * 2016-02-15 2017-07-27 Uranium Beneficiation Pty Ltd Beneficiation process for enhancing uranium mineral processing
AU2017203383B2 (en) * 2016-02-15 2017-08-03 Uranium Beneficiation Pty Ltd Beneficiation process for enhancing uranium mineral processing
WO2017139829A1 (fr) * 2016-02-15 2017-08-24 Uranium Beneficiation Pty Ltd Procédé d'enrichissement pour améliorer le traitement du minerai d'uranium
US11421300B2 (en) 2016-02-15 2022-08-23 Uranium Beneficiation Pty Ltd Beneficiation process for enhancing uranium mineral processing
PL428135A1 (pl) * 2016-05-11 2019-07-29 Anglo American Services (Uk) Ltd Zintegrowany sposób odzyskiwania wartościowych metali z rudy
US10758919B2 (en) 2016-05-11 2020-09-01 Anglo American Services (Uk) Ltd Reducing the need for tailings storage dams in mineral flotation
WO2017195008A1 (fr) * 2016-05-11 2017-11-16 Anglo American Services (Uk) Ltd Réduction du besoin de barrages de stockage de résidus dans la flottation minérale
CN109311027A (zh) * 2016-05-11 2019-02-05 英美资源服务（英国）有限公司 减少矿物浮选中尾矿存储坝的需求
EA037444B1 (ru) * 2016-05-11 2021-03-29 Англо Американ Сервисиз (Юк) Лтд Уменьшение необходимости в хвостохранилищах при флотационном обогащении руд
CN108896590A (zh) * 2018-06-26 2018-11-27 中国矿业大学 研究煤炭混合破碎中各组分破碎行为的方法及系统
CN108896590B (zh) * 2018-06-26 2020-12-25 中国矿业大学 研究煤炭混合破碎中各组分破碎行为的方法及系统
CN110433954B (zh) * 2019-06-06 2021-07-09 河南黄金产业技术研究院有限公司 一种金矿石和金废石的富金选矿方法
CN110433954A (zh) * 2019-06-06 2019-11-12 河南黄金产业技术研究院有限公司 一种金矿石和金废石的富金选矿方法
CN112295703A (zh) * 2019-07-30 2021-02-02 淡水河谷公司 自然湿度下铁矿石或铁矿石产品的粉碎方法
EP3805411A4 (fr) * 2019-07-30 2021-08-18 Vale S.A. Procédé de broyage de minerai de fer ou de produits de minerai de fer à humidité naturelle
CN112147298A (zh) * 2020-09-27 2020-12-29 长春黄金研究院有限公司 一种用于火试金混料、熔样、灰吹的自动化操作方法
CN114453129A (zh) * 2022-01-13 2022-05-10 湖南有色金属研究院有限责任公司 一种铅锌矿回收利用方法
CN114453129B (zh) * 2022-01-13 2023-09-26 湖南有色金属研究院有限责任公司 一种铅锌矿回收利用方法

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