WO2024031204A1 - Système et procédé de séparation de boules de broyage, de déchets métalliques de boules et de magnétite pour l'exploitation minière - Google Patents

Système et procédé de séparation de boules de broyage, de déchets métalliques de boules et de magnétite pour l'exploitation minière Download PDF

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Publication number
WO2024031204A1
WO2024031204A1 PCT/CL2022/050081 CL2022050081W WO2024031204A1 WO 2024031204 A1 WO2024031204 A1 WO 2024031204A1 CL 2022050081 W CL2022050081 W CL 2022050081W WO 2024031204 A1 WO2024031204 A1 WO 2024031204A1
Authority
WO
WIPO (PCT)
Prior art keywords
equipment
separation
separator
size
fed
Prior art date
Application number
PCT/CL2022/050081
Other languages
English (en)
Spanish (es)
Inventor
Lucas PEREYRA MAC NEIGHILL
Patricio José COX CORREA
Original Assignee
Compañía Electro Metalúrgica S.A.
Tecnologia En Transporte De Minerales S.A.
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 Compañía Electro Metalúrgica S.A., Tecnologia En Transporte De Minerales S.A. filed Critical Compañía Electro Metalúrgica S.A.
Priority to PCT/CL2022/050081 priority Critical patent/WO2024031204A1/fr
Publication of WO2024031204A1 publication Critical patent/WO2024031204A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties

Definitions

  • the present invention belongs to the area of the mining industry.
  • the present invention relates to a system and method for separating grinding balls, scrap balls and ore rocks with high magnetite content, in mining processes.
  • This solution incorporates an arrangement of sensors that allows determining the volume of the transported material, and applying the specific air pressure for said material.
  • the risk of transported parts and the flow of heterogeneous materials being deflected due to weak or too strong air pulses on the wrong path is reduced because compressed air lines are associated with different pressure levels.
  • document DE202007006539 U1 describes an oscillating conveying channel having a feeding area and a delivery area for a material, where the width of the delivery area is greater than the width of the feeding area.
  • a diagonal base area is provided to enlarge a part of a material flow, where the channel divides the material flow into two partial flows.
  • the bucket is formed in such a way that the flow of material is expanded.
  • the base area is attached to a supply base.
  • Document KR100787529 B1 describes a shot ball separation device that uses a magnet to machine the surface of a workpiece cleanly and to prevent foreign materials such as sand from moving into a dust collector.
  • the shot ball separation device uses a magnet and is further composed of: a supply unit that feeds mixed materials, including shot balls and foreign materials, through a shot blasting machine; a first separation unit having a pair of drums and a rubber belt installed on the drum, which first separates shot balls and foreign materials falling from the rubber belt using the magnet; a second separation unit that secondly separates fine foreign materials from the shot balls, first separated from the first separation unit, by vibration; a dust collection unit that removes floating fine dust by blowing air towards the shot balls passing through the first and second separation units; and a ball collection container which collects and feeds the separated shot balls from the second separation unit to the shot blasting machine.
  • the first separation unit comprises the drum rotated by a motor; a magnetic drum separated from the drum by a predetermined distance; the rubber belt installed surrounding a pair of drums; a first foreign material collection container that collects foreign materials falling from the magnetic drum; a first shooting ball collecting container separated from the magnetic drum by a predetermined distance and installed in a part where the shooting ball attached to the rubber tape by a magnetic field of the magnetic drum is dropped to collect the shooting balls.
  • document CN108525835 A describes a method and system for continuously removing worn steel balls from a semi-autogenous mill.
  • the method comprises the stages in which the raw ore is subjected to coarse crushing to be fed to the semi-autogenous mill to obtain mineral pulp; ore pulp is sieved through double-layer vibration sieve to obtain positive sieve steel balls, raw ore on sieve and negative sieve ore pulp, negative sieve ore pulp is fed to the normal flow of grinding and separation, and the raw ore sieve is returned to the semi-autogenous mill and stacked with the positive sieve steel balls.
  • the system comprises semi-autogenous mill, double-layer vibrating screen, coarse core conveying unit and steel ball conveyor; a discharge opening of the semi-autogenous mill is arranged on the feeding end of the double-layer vibrating screen, a negative screen discharge opening of a bottom layer screen.
  • the sieve of the double-layer vibrating screen is connected with a normal grinding and separation device in the flow, a sieve discharge opening in the bottom layer of the double-layer vibrating sieve is arranged above the feeding end of the conveying unit coarse core, the discharge end of the coarse core conveying unit is connected with a feeding opening of the semi-autogenous mill, and a positive sieve discharge opening of an upper layer sieve network of the double-layer vibrating screen is arranged over the feed end of the steel ball conveyor.
  • a proposed solution aimed directly at the separation of matter containing magnetite is that proposed by document W02020051721 A1, which describes a steel/magnetite separation system, comprising at least a feed box for feeding magnetite contaminated with scrap balls. of steel to at least one feeder connected by at least one high slope conveyor belt.
  • the system further comprises at least one particle size separator vibrating screen, which sends particles less than or equal to 60 mm in size to a first separation subsystem of steel v/s magnetite and particles greater than 60 mm to a second subsystem.
  • the first separation subsystem comprises an input chute, a vibrating feeding system, a conveyor belt, a plurality of sensors arranged under the belt for the detection of steel between magnetite, which are mounted in a transverse arrangement to the circulation of the conveyor belt, a plurality of pneumatic cylinders installed transversally to the circulation of the conveyor belt and at the end of the stroke of the same conveyor belt, activated by the signal emitted by each sensor that corresponds to its position within from the transverse line to the conveyor belt, producing mechanical action of a metal plate physically connected to the stem of each pneumatic cylinder, a system for unitary selection of the generated rejection consisting of a channel for unitary displacement of the magnetite particles and scrap of balls of steel or any other metallic element that circulates within this channel, mounted on a vibrating system installed in the area of the feeding end of the V channel and a separation plate installed at the end of the channel path; and where the second separation subsystem comprises an inlet chute, a plurality of channels mounted on a vibrating system installed in the area of the
  • the present invention relates to a system and method for separating grinding balls, scrap balls and rocks with high magnetite content, in mining processes.
  • the system comprises at least one separating device for separating spherical or hemispherical elements, comprising an inclined vibrating table and a separating device for separating material with high magnetic content from non-magnetic material or material with low magnetic content, further comprising a conveyor belt that transports the material, at least one analysis device that receives and analyzes the material in pieces from the conveyor belt and a separator with multiple air nozzles, a set of double-way nozzles can also be used to launch air jets.
  • the method associated with the system described above comprises the following essential steps: a) introducing the material into the inclined vibrating table; b) separate materials by size; c) extract spherical or hemispherical elements; d) introduce the material onto the conveyor belt; e) forming a monolayer of material on the conveyor belt; f) determining the properties of the material by means of a plurality of detection means arranged in the analysis device; and g) selectively separating the magnetic material from the non-magnetic material using air jets from the separator
  • FIGURES Figure 1 represents a side view of the equipment intended for separation by size, according to one embodiment of the invention.
  • Figure 2 represents a top and perspective view of the equipment intended for separation by size, according to one embodiment of the invention.
  • Figure 3 represents a side view of the equipment intended to separate spherical and hemispherical elements, according to one embodiment of the invention.
  • Figure 4 represents a top and perspective view of the equipment intended to separate spherical and hemispherical elements, according to one embodiment of the invention.
  • Figure 5 represents a perspective view of the equipment intended to separate, according to the properties of the scrap material, balls and minerals with high magnetite content, according to one embodiment of the invention.
  • Figure 6 represents a view of the arrangement of the system equipment, according to one embodiment of the invention.
  • Figure 7 represents a view of the arrangement of the equipment for separation by size and for separating spherical and hemispherical elements, according to one embodiment of the invention.
  • Figure 8 represents a view of the arrangement of the equipment for separation by size and for separating spherical and hemispherical elements, according to another embodiment of the invention.
  • the present invention relates to a system (100) and method for separating grinding balls, scrap balls and ore rocks with high magnetite content in mining processes.
  • the system (100) is configured as a modular and semi-mobile separator system for the separation of ball scrap using a set of semi-mobile separation equipment composed of at least three main modules in addition of its auxiliary equipment such as a power and control room, a compressor room, generating equipment, among others.
  • the system aims to carry out different types of separation: separation of material by size; separation of material from spherical elements and other shapes; and separation of composite material from scrap and high magnetite content. These separation stages act independently and can be exchanged according to the characteristics of the material.
  • the system (100) comprises at least one vibrating screen type equipment (10), preferably of a stationary type, made up of a set of parallel bars that are arranged in a frame and located in the direction of flow. of material.
  • the nominal classification capacity using the equipment (10) is up to 100 t/h.
  • the classification of the material is carried out in three sizes: [> 65 mm]; [65 - 35mm]; and [> 35 mm] or, depending on the requirement, the separation can be made at [> 90 mm]; [90 - 70mm]; and [> 70mm].
  • Said equipment (20) For the separation stage by shape, in particular spherical elements, there is equipment (20), which is designed to separate spherical elements and other shapes.
  • Said equipment (20) comprises an inclined vibrating table (21) composed of trays inclined, where the material is fed from a feeder (22).
  • a feeder 212.
  • three important variables must be taken into consideration: drop height, inclination angle, and vibration characteristics.
  • the drop height mainly influences the speed and inertia with which the material enters the inclined trays, while the angle of inclination and vibration will influence the direction in which the objects will move depending on their shape and speed of movement of the material in a certain direction which also affects the necessary inertia which the forces applied to the object must overcome so that it rolls in the direction of the inclined plane. In this way, the passage of spherical elements to the next stage is avoided.
  • at least one piece of equipment (30) is available, which allows separating scrap balls and mineral with a high magnetite content according to the properties of the material.
  • the nominal separation capacity in equipment (30) is up to 100 t/h. Depending on the characteristics of the material, different configurations can be established to maximize the efficiency and capacity of the set of equipment (30).
  • the technology for separating material composed of scrap and high magnetite content allows, through sensors, to characterize each object in a material flow, identifying the objects of interest depending on the application, which are subsequently physically separated by shots of pressurized air up to 10 bar.
  • the technology implemented stands out for its ability to combine multiple sensors in the same equipment, improving its performance for different materials and ensuring flexibility against variations in the composition of the material.
  • Magnetic induction sensors are in principle used to separate magnetite and scrap. Without prejudice to the above, by having a greater number of sensors it could eventually not only separate the magnetite and scrap, but also preconcentrate the concentration of some mineral of interest.
  • the separator equipment (30) for separating the magnetic material from the paramagnetic material comprises a conveyor belt (31), at least one analysis device (32) and a separator with multiple nozzles or at least one two channels (33) to launch air jets.
  • said nozzle (33) has a double air jet connected to two air supply paths, in order to act on spherical elements; however, it is possible for said nozzle (33) to operate with a single air path.
  • the equipment (10, 20, 30) can be available in different configurations, depending on the specific requirement.
  • Configuration 1 The system (100) works fed with grinding media scrap (without magnetite mineral). In this way, the teams operate separators by size (10) and the separator equipment by shape (20), connected in series.
  • Configuration 1.1 First, material is fed to the separator equipment by size (10) and then it is fed to the separator equipment by shape (20) as shown, with a size range in which the spherical elements of interest are found (recyclable in secondary grinding, usually in diameters (70 mm - 90 mm).
  • Configuration 1.2 First, the shape separator equipment (20) is fed and then the size separator equipment (10) is fed, with the size range in which the spherical elements of interest are found.
  • Working with configurations 1.1. o 1.2 will depend mainly on the granulometric distribution of the material and the objective of the plant in terms of generating a certain final product in quality, size, and quantity.
  • the size separator equipment (10) has a greater capacity (nominal up to 100 t/h) versus the shape separator equipment (20) (nominal up to 50 t/h)
  • Configuration 2 The system (100) works fed with grinding media scrap and ore with high magnetite content.
  • the size separator equipment (10) works connected in series, then the shape separator equipment (20) and finally the material property separator equipment (30).
  • Tests were carried out to estimate the optimal fall height and inclination angle in the shape separator equipment (20).
  • the material used in the test corresponds to scrap grinding media including balls, broken balls, pins, plates, and other shapes. Density The approximate size of the mixture of materials is 3 t/m 3 , dry, and with balls smaller than 150 mm. The ratio of balls and other shapes in volume is 4:6.
  • Vibration characteristic values or ranges that optimize the process range between 15 - 5 mm in the direction of material transport, tests are carried out at 9.5 mm.
  • Tests are carried out with a drop height of 250 mm, working correctly (there is no rebound outside the equipment, nor a "jam”); The angle of attack at 30° is correctly allowing desired horizontal movement of the material.
  • An equipment is proposed with a (long) tray path of 1,200 mm and in three trays in order to maximize the possibility of spherical objects rolling back. Furthermore, in feeding it is possible to use special feeding medium that allows the monolayer to be distributed across its width.
  • the special feeding means adjusts the height and speed at which the material falls so that the material enters the equipment with a desired speed
  • Tests were carried out to obtain material particle size distribution for magnetite and grinding ball scrap.
  • the data was the basis for designing the process flow to efficiently classify high-magnetite copper ore rocks and ball scrap.
  • test work generated reference information from terrain information for a real application analyzing a sample of approximately 5,600 kg from which it was observed that over 95% of the representative material corresponded to copper rocks with high magnetite content, and a lower percentage corresponded to steel scrap. In the fraction corresponding to the steel scrap, over 95% corresponded to intact mill balls with a diameter of over 100 mm.
  • INDUCTION > SCRAP / MAGNET Two active coils with a surrounding magnetic field were used to detect conductors and magnetic properties of objects. The main application is the separation of electrically conductive components (metals) according to sensitivity.
  • the inductive sensor was able to detect and the machine was able to shoot and separate the non-spherical scrap content, except the rolling balls. Two initial steps with different sensitivity were performed to evaluate the separation effect. In the operational context, these separations can be performed in a single stage.

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Abstract

La présente invention concerne un système et un procédé de séparation de boules de broyage, de déchets métalliques de boules et de roches à haute teneur en magnétite, dans des processus miniers. Le système comprend au moins un dispositif séparateur pour séparer des éléments sphériques ou semi-sphériques qui comprend une table vibrante inclinée et un dispositif séparateur pour séparer la matière à haute teneur magnétique de la matéière non magnétique ou à faible teneur magnétique, qui comprend en outre une courroie transporteuse qui transporte la matière, au moins un dispositif d'analyse qui reçoit et analyse la matière par lots provenant de la courroie transporteuse et un séparateur à buses d'air multiples, un ensemble de buses à double voie pour éjecter des jets d'air pouvant également être utilisé.
PCT/CL2022/050081 2022-08-12 2022-08-12 Système et procédé de séparation de boules de broyage, de déchets métalliques de boules et de magnétite pour l'exploitation minière WO2024031204A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CL2022/050081 WO2024031204A1 (fr) 2022-08-12 2022-08-12 Système et procédé de séparation de boules de broyage, de déchets métalliques de boules et de magnétite pour l'exploitation minière

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CL2022/050081 WO2024031204A1 (fr) 2022-08-12 2022-08-12 Système et procédé de séparation de boules de broyage, de déchets métalliques de boules et de magnétite pour l'exploitation minière

Publications (1)

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WO2024031204A1 true WO2024031204A1 (fr) 2024-02-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101516518A (zh) * 2005-10-24 2009-08-26 托马斯·A·瓦莱里奥 不同材料的拣选方法、系统及设备
CN102416386A (zh) * 2011-10-27 2012-04-18 山东博润工业技术有限公司 干法排煤矸石选煤的工艺及系统
US8399790B1 (en) * 2007-08-31 2013-03-19 James Edward Slade Methods and systems for recovering alluvial gold
DE102012112093A1 (de) * 2012-12-11 2014-06-12 Thyssenkrupp Resource Technologies Gmbh Verfahren und Anlage zur Aufbereitung von erzhaltigem Material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101516518A (zh) * 2005-10-24 2009-08-26 托马斯·A·瓦莱里奥 不同材料的拣选方法、系统及设备
US8399790B1 (en) * 2007-08-31 2013-03-19 James Edward Slade Methods and systems for recovering alluvial gold
CN102416386A (zh) * 2011-10-27 2012-04-18 山东博润工业技术有限公司 干法排煤矸石选煤的工艺及系统
DE102012112093A1 (de) * 2012-12-11 2014-06-12 Thyssenkrupp Resource Technologies Gmbh Verfahren und Anlage zur Aufbereitung von erzhaltigem Material

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