EP2500102B1 - Dispositif de flottation avec un élément de distribution d'un fluide pouvant générer un courant du fluide vers le collecteur en mousse - Google Patents

Dispositif de flottation avec un élément de distribution d'un fluide pouvant générer un courant du fluide vers le collecteur en mousse Download PDF

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Publication number
EP2500102B1
EP2500102B1 EP11158298.7A EP11158298A EP2500102B1 EP 2500102 B1 EP2500102 B1 EP 2500102B1 EP 11158298 A EP11158298 A EP 11158298A EP 2500102 B1 EP2500102 B1 EP 2500102B1
Authority
EP
European Patent Office
Prior art keywords
suspension
flotation
bubbles
distribution element
fluid distribution
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.)
Not-in-force
Application number
EP11158298.7A
Other languages
German (de)
English (en)
Other versions
EP2500102A1 (fr
Inventor
Stefan Blendinger
Robert Fleck
Gerold Franke
Lilla Grossmann
Werner Hartmann
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.)
Primetals Technologies Germany GmbH
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Primetals Technologies Germany GmbH
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 to EP11158298.7A priority Critical patent/EP2500102B1/fr
Application filed by Primetals Technologies Germany GmbH filed Critical Primetals Technologies Germany GmbH
Priority to BR112013023569A priority patent/BR112013023569A2/pt
Priority to CN201280013047.0A priority patent/CN103429352B/zh
Priority to CA2830205A priority patent/CA2830205A1/fr
Priority to AU2012228575A priority patent/AU2012228575A1/en
Priority to RU2013145953/03A priority patent/RU2013145953A/ru
Priority to US14/005,204 priority patent/US20140001102A1/en
Priority to PCT/EP2012/053491 priority patent/WO2012123258A1/fr
Priority to MX2013010527A priority patent/MX2013010527A/es
Publication of EP2500102A1 publication Critical patent/EP2500102A1/fr
Priority to CL2013002537A priority patent/CL2013002537A1/es
Priority to ZA2013/06811A priority patent/ZA201306811B/en
Application granted granted Critical
Publication of EP2500102B1 publication Critical patent/EP2500102B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • B03D1/14—Flotation machines
    • 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
    • B03D1/14—Flotation machines
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B03D1/1456—Feed mechanisms for the slurry
    • 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
    • B03D1/14—Flotation machines
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B03D1/1462—Discharge mechanisms for the froth
    • 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
    • B03D1/14—Flotation machines
    • B03D1/1493—Flotation machines with means for establishing a specified flow pattern
    • 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
    • B03D1/14—Flotation machines
    • B03D1/24—Pneumatic
    • 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
    • B03D1/14—Flotation machines
    • B03D1/24—Pneumatic
    • B03D1/26—Air lift machines

Definitions

  • the invention relates to a flotation device, comprising a housing with a flotation chamber for receiving a suspension and at least one inlet for the suspension, and at least one foam collecting device for receiving and discharging a foam product, which is arranged on an upper side of the housing, wherein at least one fluid distribution element for Generation of a directed towards the at least one foam collecting device flow above the at least one inlet in the flotation chamber is present.
  • the invention further relates to a method for removing a foam product formed in such a flotation device, wherein the flotation chamber is at least partially filled with suspension, the suspension being fumigated and the foam product being formed from gas bubbles and solid particles adhering thereto, which adheres to a surface of the suspension collects and is discharged via the at least one foam collecting device by means of the at least one fluid distribution element generates a flow in the direction of the at least one foam collecting device and the vertical position of the at least one fluid distribution element in the flotation is adjusted in dependence on a level of the flotation with suspension.
  • Flotation is a physical separation process for separating fine-grained mixtures of solids, such as ores and gangue, in an aqueous slurry by means of gas bubbles due to a different surface wettability of the particles contained in the suspension. It is used for the treatment of mineral resources and in the processing of preferably mineral substances used with a low to moderate content of a useful component or a valuable material, for example in the form of non-ferrous metals, iron, metals of the rare earths and / or precious metals and non-metallic mineral resources.
  • a suspension of water and fine-grained solid mixed with reagents is generally introduced into a flotation chamber via at least one nozzle arrangement.
  • the purpose of the reagents is to ensure that, in particular, the valuable particles or valuable material particles which are preferably to be separated off are made hydrophobic in the suspension become.
  • xanthates are used as reagents, in particular to selectively hydrophobize sulfidic ore particles.
  • the at least one nozzle arrangement is supplied with gas, in particular with air, which comes into contact with the hydrophobic particles in the suspension.
  • the hydrophobic particles adhere to forming gas bubbles, so that the gas bubble structures, also called aeroflocs, float and form the foam product on the surface of the suspension.
  • the foam product is discharged into a collecting container and usually thickened.
  • the quality of the foam product or the separation efficiency of the flotation process depends inter alia on the probability of collision between a hydrophobic particle and a gas bubble.
  • a preferred diameter of the gas bubbles is less than about 5 mm and is in particular in the range between 1 and 5 mm.
  • Such small gas bubbles have a high specific surface area and are therefore able to bind and take up significantly more valuable material particles, in particular ore particles, per amount of gas used than larger gas bubbles are capable of doing.
  • gas bubbles larger in diameter increase faster than gas bubbles of smaller diameter.
  • the smaller gas bubbles are collected by larger gas bubbles and combine with them to even larger gas bubbles. This reduces the available specific surface of the gas bubbles in the suspension, can be bound to the valuable particles.
  • hybrid flotation cells which represent a combination of a pneumatic flotation cell with a columnar flotation cell
  • larger particulate matter having particle diameters in the range of 50 microns and larger are not completely bound to the existing gas bubbles and thus can only be partially separated from the suspension. Fines with particle diameters in the range of 20 microns and less, however, are particularly well deposited.
  • the performance of a flotation device also depends on the efficiency of a removal of the foam product formed from the surface of the suspension. So-called dead zones often form in flotation devices in which only vertical transport processes take place between the suspension and the foam product floating thereon. The application of solid particles to be separated is reduced in the dead zones, since the bubbles of the foam product stay there too long and burst already on site. Thus, solid particles formerly bound to such a burst bubble sink back into the suspension and can not be discharged as a foam product.
  • the WO 2006/069995 A1 describes a pneumatic flotation cell having a housing comprising a flotation chamber with at least one nozzle arrangement for feeding suspension into the flotation chamber, here referred to as ejectors, furthermore with at least a feed arrangement for feeding gas into the flotation chamber, when using air aeration devices or aerators, and a collecting container for a foam product formed in the flotation.
  • the foam product is ideally pushed away by the incoming foam and runs into a foam collecting channel.
  • the US 6,095,336 and the WO 1993/20945 A1 describe flotation cells with a network of permanently installed foam collecting troughs, which are intended to remove the foam product as quickly as possible at each location of the surface of the suspension.
  • the RU 2 397 818 C1 describes a flotation device in which a gas flow is blown towards a foam collecting channel on the surface of the suspension in order to accelerate the foam product towards the foam collecting channel.
  • the US 6,926,154 B2 describes a flotation machine comprising a rotating device for foam product removal, which at least partially immersed in the foam and pushes it mechanically towards the foam collecting channel.
  • the three last-mentioned, active systems for accelerating the removal of the foam product usually have such high shear forces on the foam product that this leads to premature bursting of bubbles and thus also to a reduced yield of foam product.
  • a flotation device of the type mentioned and a method of the type mentioned are, for example, from the US 4,618,430 A known.
  • gas nozzles are arranged in the vicinity of the surface of the liquid, which eject a gas flow over the surface of the liquid and thereby promote the scum to a foam collecting device.
  • US 1 952 727 A It is known to apply to a flotation the top of the foam with a water / gas mixture. The application is for the purpose of adjusting the composition of the foam.
  • a flotation device is known in which a blower tube is disposed within the housing below the liquid level, which serves to move the foam in an associated overflow channel.
  • the blowpipe is connected to a compressed air line. A vertical adjustability of the blowpipe is not mentioned.
  • a locally optimal supply of fluid in the direction of foam product and / or suspension should take place at all times.
  • the object is achieved for the flotation device mentioned above in that at least one positioning device is provided which automatically adjusts the vertical position of the at least one fluid distribution element above the inlet in the flotation chamber as a function of a fill level of the flotation chamber with suspension such that at least one Part of a discharged from the at least one fluid distributor element fluid adjacent to the surface of the suspension flows directly into the suspension and thus below the surface of the suspension in this.
  • the object is achieved for the aforementioned method for discharging a foam product formed in a flotation device according to the invention in that the vertical position of the at least one fluid distribution element above the inlet in the flotation chamber is automatically adjusted as a function of a level of the flotation chamber with suspension such that at least part of a fluid delivered by the at least one fluid distributor element adjoins the surface of the suspension directly into the suspension and thus below the surface of the suspension flows.
  • a positioning device is to be understood on the one hand as an arrangement having a float as a positioning device, which floats on the surface of the suspension and ensures a constant, automatic positioning of the fluid distribution element to the surface of the suspension.
  • vertical height adjustment can also take place via a position device with electric drive, whereby it is also possible to vary how far a fluid distribution element should dive into the suspension at a certain filling level. As a result, different levels of immersion of a fluid distribution element in the suspension can be realized with different fill levels.
  • the flotation device has the advantage that the vertical position of the at least one fluid distribution element above the inlet into the flotation chamber is variable and thus adjustable to a level of suspension in the upper part of the flotation chamber.
  • a fluid distributor element can optimally act at the interface or across the interface between the foam and the suspension, thereby enabling a particularly gentle acceleration of the foam product in the direction of the foam collecting device. It gets through that out of one
  • Fluid distribution element fluid flowing out of the foam and / or displaced the suspension and pushed in the direction of a foam collection device This can be done at relatively low outflow velocities of the fluid, so that no bubbles burst prematurely.
  • a fluid distribution element is arranged in particular adjacent to an area in the flotation chamber, in which would be located without the fluid distribution element, a dead zone in which take place only vertical transport operations between the suspension and the foam product floating thereon.
  • the fluid either gas, especially air, can be used or a liquid, in particular water, are flowed.
  • the vertical position of the at least one fluid distribution element is adjusted such that at least a portion of a fluid discharged from the at least one fluid distribution element immediately adjacent to the surface of the suspension flows directly into the suspension.
  • fluid distribution elements for introducing gas and / or for introducing liquid can be present at the same time.
  • the flotation chamber has a vertical central axis and the at least one foam collecting device is annular and is arranged concentrically to the central axis, wherein the at least one fluid distribution element is arranged to generate a directed away from the central axis in the direction of the at least one annular foam collecting device flow.
  • a plurality of concentrically arranged annular foam collecting devices may be present, to each of which at least one fluid distributor element is assigned.
  • the circumference of the flotation chamber can have different shapes such as a rectangle, a circle, an ellipse, etc., although here the circular shape is preferred.
  • the flotation machine is preferably a pneumatic flotation cell, a columnar flotation cell or a hybrid flotation cell, in which both types are combined.
  • the at least one fluid distributor element is preferably set up to generate a flow directed radially from the central axis of the flotation chamber. This minimizes the way a bubble of the foam product must travel. The time to reach the foam collection device and thus the risk that a bubble could burst during this time is also minimized. Alternatively, however, a flow directed obliquely to a separating edge between the flotation chamber and the foam collecting device can also be generated.
  • At least one control or regulating device for controlling or regulating an outflow velocity of the fluid from the at least one fluid distribution element and / or the vertical position of the at least one fluid distribution element is present.
  • the outflow velocity of the fluid is adjustable via the volume flow of fluid and / or the fluid pressure.
  • the first sensor is preferably designed as an optical sensor.
  • An online monitoring of these properties which provide information about the quality of the foam product, allows a targeted optimization of the vertical position of a fluid distribution element or the outflow velocity of fluid.
  • the first sensor is installed in a region in which a foaming behavior can be monitored in a zone that is to be regarded as a dead zone without a fluid distributor element.
  • the outflow velocity of the fluid and / or the amount of fluid is reduced and an even gentler flow is created to treat the bubbles more gently and to extend their shelf life.
  • the aim of the scheme is to adjust the fluid flow so that a high output of foam product is achieved with maximum quality of the foam product. This point is called “optimum froth recovery” or “peak air recovery”.
  • the color of the foam product gives, for example, a statement as to how high the loading of the gas bubbles is with the recyclable material particles to be delivered. The higher the loading of the gas bubbles with valuable particles, the more intense is the color of the foam product. If the foam product is light in color, for example in sulfidic ores, it can be assumed that the outflow velocity of the fluid or the fluid flow is too great and thus the concentration of valuable particles to be discharged, for example of copper or molybdenum sulfides, too low in the foam product. An undesirable amount of gangue material is introduced into the foam product, as a result of which its quality assumes unacceptably low values.
  • the fluid flow and / or its outflow speed is reduced until the required color level of the foam product and thus the required quality are again achieved.
  • the bubble shape of individual bubbles in the foam product can also be used to control the fluid quantity and / or outflow velocity of the fluid and thus the decisive process parameters yield and quality. While in some processes a round shape of the bubbles in the foam is preferable, in other flotation processes, a polygonal bubble structure may also be optimal for the process. Depending on the particular process, therefore, the amount of fluid and / or its outflow speed is controlled so that the respective more favorable bubble shape results in terms of discharge and quality.
  • At least one second sensor for determining a filling level of the flotation chamber with suspension is present.
  • An online level measurement also enables a targeted optimization of the vertical position of a fluid distribution element or of the outflow velocity of fluid.
  • the at least one first sensor and / or the at least one second sensor is connected to the at least one control and regulating device. This allows a cost-effective, fully automatic operation of the flotation device with high foam discharge.
  • the control or regulating device thus enables optimal foam discharge at any time with changing input parameters with regard to the fill level of the flotation chamber and a quality or quality of the foam product.
  • the at least one fluid distributor element comprises an open-pored component, via which the fluid is dispensed.
  • the open-porous component is formed in particular by a foam material made of metal or plastic.
  • the fluid distribution element can also comprise a tube or a hose with fluid outlet openings, for example in the form of slots, holes or fluid-permeable membranes.
  • the at least one fluid distribution element is preferably designed such that a laminar flow is generated in the direction of the at least one foam collecting device. Vortex formations are avoided as far as possible, as these unnecessarily prolong a residence time of the foam product on the surface of the suspension and the bubbles mechanically stronger so that more bubbles burst prematurely and less foam product can be discharged overall.
  • a use of a flotation device according to the invention for flotation of solid particles from a valuable material, in particular ore mineral, from a suspension having a solids content in the range of 20 to 50% to form a foam product is preferred. Under such conditions, the efficiency of a flotation device can be significantly increased by means of at least one fluid distribution element.
  • FIG. 1 schematically shows a first flotation, comprising a housing 2 with a flotation chamber 2a for receiving a suspension S and at least one annular foam collecting device 3 for receiving and discharging a foam product SP, which is arranged on an upper side of the housing 2.
  • the housing 2 is shown for clarity in the longitudinal section.
  • the suspension S optionally with the addition of gas, is introduced via an inlet 5a into the flotation chamber 2a and mixed with gas bubbles ascending from the bottom of the flotation chamber 2a, in particular air bubbles.
  • the gas bubbles in the suspension S are formed by a gassing element 6.
  • Hydrophobic solid particles from the suspension S adhere to the gas bubbles, so that the gas bubble structures, also called aero flakes, float and form the foam product SP on the surface S0 of the suspension S.
  • the foam product SP flows via the edge of the housing (see arrows) into the foam collecting device 3. Remaining residual pulp R flows out of the flotation chamber 2 a via an outlet 5 b.
  • a fluid distribution element 4 for generating a substantially directed in the direction of the foam collecting device 3 flow in the flotation chamber 2a is present, the vertical position in the flotation chamber 2a by means of a positioning device 7 is variable.
  • the fluid distributor element 4 is arranged both above and below the boundary surface or surface S0 between suspension S and foam product SP.
  • the fluid distribution element 4 is formed from an open-pore metal foam and comprises a supply line 4a, through which the fluid is transported and on which the positioning device 7 engages.
  • the fluid distribution element 4 is set up to produce a flow directed radially away from the center axis M of the flotation chamber 2a.
  • a control or regulating device 8 is connected to a first sensor 9 for optically determining the rate of disintegration of the bubbles of the foam product SP and to a second sensor 10 for determining the level of suspension S in the flotation chamber 2a. Furthermore, the control and regulating device 8 is connected to a valve arrangement 11, via which adjust the flow rate and / or the pressure of the fluid F and consequently the outflow velocity of the fluid F from the fluid distribution element 4 as a function of the rate of disintegration of the bubbles of the foam product SP can be influenced.
  • the vertical desired position of the fluid distribution element 4 is dependent on the level and / or the decay rate on the control or regulating device of the positioning 7 transmitted, which sets the vertical target position accordingly.
  • the formation of dead zones can be reliably prevented and a high foam discharge can be achieved.
  • FIG. 2 shows a second flotation device 1 '. Same reference numerals as in FIG. 1 identify similar elements.
  • a fluid distributor element 4 in the form of an annularly arranged hose is present, which has slots on its side facing the housing 2 in order to allow the fluid F to pass in the direction of the housing 2.
  • a floating body 12 is provided, which moves together with the surface SO of the suspension S up or down.
  • the control and regulating device 8 is also connected here to a valve arrangement 11, via which the volumetric flow and / or the pressure of the fluid F are set and, as a consequence, the outflow velocity of the fluid F from the fluid distribution element 4 as a function of the rate of disintegration of the bubbles of the foam product Influence SP.
  • the formation of dead zones can be reliably prevented and a high foam discharge can be achieved.
  • FIG. 3 schematically shows a third flotation device 1 '' in longitudinal section. It is a columnar flotation cell, which is called a hybrid flotation cell when operated with air to fumigate the suspension. Same reference numerals as in the Figures 1 and 2 identify similar elements.
  • the housing 2 is widened in the upper part and there is an injection of suspension S and gas G via the inlet 5a.
  • a cylindrical insert 20 is present, which is a pneumatic Flotationsculture outside the insert 20 separates from another flotation inside the insert 20.
  • the enriched gas G suspension S is injected under high pressure in the flotation chamber 2a.
  • gas bubbles are formed, which are then used for the flotation. This mechanism is referred to as so-called flash floatation.
  • the further flotation stage operates as so-called column flotation.
  • a gassing element 6 for supplying gas G is arranged in the lower part of the flotation chamber 2a, where an outlet 5b for residual pulp R is also provided, which, for example, is designed as an aerator. This produces gas bubbles, which are suitable for binding recyclable material particles in the lower part of the flotation device 1 " .
  • a rod-shaped first fluid distribution element 4a is arranged centrally in the insert 20 and serves to introduce fluid F in the region of the surface SO of the suspension S, the fluid F flowing radially away from the central axis M.
  • An annular second fluid distributor element 4b surrounds the insert 20 and serves to introduce fluid F in the region of the surface SO of the suspension S, the fluid F flowing radially outward in the direction of the vessel 2.
  • the vertical position of the fluid distribution elements 4a, 4b is variable, which is indicated here only by double arrows.
  • the valve assembly 11 and also not shown positioning 7 are connected, has been omitted here for clarity. It is in this regard on the Figures 1 and 2 directed.
  • FIG. 4 shows the third flotation device 1 '' in the plan view, wherein the configuration of the annular foam collecting means 3, the insert 20 and the annular second fluid distribution element 4b is better visible.
  • the foam collecting device 3 has two drainage areas 3a, 3b for discharging the foam product SP.
  • FIG. 5 shows a section of a longitudinal section of a conventional flotation without Fluidvermaschinerelement, in principle similar to FIG. 3 in the upper region in which the insert 20 is located, between the center line M and the housing 2.
  • the same reference numerals as in the FIGS. 1 to 4 identify similar elements.
  • the suspected flow conditions in the foam product SP are shown.
  • two dead zones TZ 1 , TZ 2 form , in which only vertical transport processes take place between the suspension S and the foam product SP floating thereon.
  • the first of the two dead zones TZ 1 is located in the region of the center axis M.
  • the second of the two dead zones TZ 2 is formed annularly around the insert 20.
  • FIG. 6 shows the section FIG. 5
  • a first fluid distribution element 4a is rod-shaped formed and arranged in the region of the central axis M, wherein it partially dips into the suspension S.
  • a second fluid distribution element 4 b is annular and surrounds the insert 20, wherein it completely immersed in the suspension S.
  • Same reference numerals as in the FIGS. 1 to 5 identify similar elements.
  • the suspected flow conditions in the foam product SP are shown.
  • no dead zones are formed due to the fluid discharged through the fluid distribution elements 4a, 4b, in which only vertical transport processes take place between the suspension S and the foam product SP floating thereon.
  • the previously existing dead zones have now also become lifting zones HZ 1 , HZ 2 , so that considerably more foam product SP can be discharged than before.
  • the output of separated solid particles is significantly increased.
  • FIG. 7 shows a fourth flotation device 1 ''' in longitudinal section. It is a columnar flotation cell as in FIG. 3 which, when operated with air for gassing the suspension S, is called a hybrid flotation cell. Same reference numerals as in the FIGS. 1 to 6 identify similar elements.
  • An annular fluid distributor element 4 surrounds the insert 20 and serves to introduce fluid F in the region of the surface SO of the suspension S, the fluid F flowing radially outward in the direction of the vessel 2.
  • the vertical position of the fluid distribution elements 4 is variable, which is indicated here only by double arrows.
  • FIGS. 1 to 7 only examples of a flotation device according to the invention.
  • the fluid distribution element, the gassing element, the foam collection device, the insert, etc. may readily be present.
  • the number of inlets, outlets, fluid distribution elements, first and / or second sensors, gassing elements, control devices, positioning devices, etc. may be varied without departing from the spirit of the invention.

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Claims (13)

  1. Dispositif de flottation (1, 1', 1'', 1"') comprenant un récipient (2) comportant une chambre de flottation (2a) servant à recevoir une suspension (S), et comportant au moins une entrée (5a) pour la suspension (S), ainsi qu'au moins un dispositif collecteur de mousse (3) servant à recevoir et à évacuer un produit moussant (SP), dispositif collecteur de mousse qui est disposé sur une partie supérieure du récipient (2), où il y a en outre au moins un élément répartiteur de fluide (4, 4a, 4b) servant à fournir un fluide (F) et servant à la production d'un écoulement orienté en direction de l'au moins un dispositif collecteur de mousse (3), ledit écoulement se produisant au-dessus de l'au moins une entrée (5a) dans la chambre de flottation (2a), caractérisé en ce qu'il y a au moins un dispositif de positionnement (7) qui est agencé pour régler la position verticale de l'au moins un élément répartiteur de fluide (4, 4a, 5b) au-dessus de l'entrée (5a) dans la chambre de flottation (2a), automatiquement en fonction d'un niveau de remplissage de la chambre de flottation (2a) avec suspension (2a), de manière telle qu'au moins une partie d'un fluide (F) fourni par l'au moins un élément répartiteur de fluide (4, 4a, 4b), contiguë à la surface (SO) de la suspension (S), pénètre directement dans la suspension (S) et, par conséquent, au-dessous de la surface (SO) de la suspension (S) contenue dans ladite chambre de flottation.
  2. Dispositif de flottation selon la revendication 1, caractérisé en ce que la chambre de flottation (2a) présente un axe médian vertical (M), et l'au moins un dispositif collecteur de mousse (3) est configuré de forme annulaire et disposé de façon concentrique par rapport à l'axe médian (M), et en ce que l'au moins un élément répartiteur de fluide (4, 4a, 4b) est agencé pour la production d'un écoulement orienté en direction de l'au moins un dispositif collecteur de mousse (3), de forme annulaire, loin de l'axe médian (M).
  3. Dispositif de flottation selon la revendication 2, caractérisé en ce que l'au moins un élément répartiteur de fluide (4, 4a, 4b) est agencé pour la production d'un écoulement dirigé en s'éloignant de l'axe médian (M) dans le sens radial.
  4. Dispositif de flottation selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il y a au moins un dispositif de commande ou de réglage (8) servant à la commande ou au réglage d'une vitesse de sortie d'un fluide (F) provenant de l'au moins un élément répartiteur de fluide (4, 4a, 4b), et/ou de la position verticale de l'au moins un élément répartiteur de fluide (4, 4a, 4b).
  5. Dispositif de flottation selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il y a en outre au moins un premier capteur (9) servant à déterminer au moins une propriété du produit moussant (SP), prise dans le groupe comprenant :
    - une couleur du produit moussant (SP),
    - une taille des bulles du produit moussant (SP),
    - une forme des bulles du produit moussant (SP),
    - une vitesse de désintégration des bulles du produit moussant (SP),
    - une vitesse de transport des bulles du produit moussant (SP).
  6. Dispositif de flottation selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il y a en outre au moins un deuxième capteur (10) servant à déterminer un niveau de remplissage de la chambre de flottation (2a) avec suspension (S).
  7. Dispositif de flottation selon la revendication 5 ou 6, caractérisé en ce que l'au moins un premier capteur (9) et/ou l'au moins un deuxième capteur (10) est relié à l'au moins un dispositif de commande ou de réglage (8) selon la revendication 4.
  8. Procédé pour l'évacuation d'un produit moussant (SP) formé dans un dispositif de flottation (1, 1', 1", 1"') selon l'une quelconque des revendications 1 à 7, où la chambre de flottation (2a) est remplie au moins partiellement d'une suspension (S), où la suspension (S) est chargée en gaz, et le produit moussant (SP) se forme à partir de microbulles de gaz et de particules de matière solide adhérant à celles-ci, produit moussant qui s'accumule sur une surface (SO) de la suspension (S) et est évacué par l'au moins un dispositif collecteur de mousse (3) où, au moyen de l'au moins un élément répartiteur de fluide (4, 4a, 4b), est produit un écoulement en direction de l'au moins un dispositif collecteur de mousse (3), caractérisé en ce que la position verticale de l'au moins un élément répartiteur de fluide (4, 4a, 4b), dans la chambre de flottation (2a), est réglée automatiquement en fonction d'un niveau de remplissage de la chambre de flottation (2a) avec suspension (S), de manière telle qu'au moins une partie d'un fluide (F) fourni par l'au moins un élément répartiteur de fluide (4, 4a, 4b), contiguë à la surface (SO) de la suspension (S), pénètre directement dans la suspension (S) et, par conséquent, au-dessous de la surface (SO) de la suspension (S) contenue dans ladite chambre de flottation.
  9. Procédé selon la revendication 8, caractérisé en ce que l'au moins un élément répartiteur de fluide (4, 4a, 4b) est disposé dans la chambre de flottation (2a), de manière telle que soit empêchée une formation d'une zone morte (TZ1, TZ2) dans laquelle ont lieu uniquement des processus de transports verticaux entre la suspension (S) et le produit moussant (SP) flottant sur celle-ci.
  10. Procédé selon l'une des revendications 8 ou 9, caractérisé en ce qu'un écoulement laminaire est produit, par l'au moins un élément répartiteur de fluide (4, 4a, 4b), en direction de l'au moins un dispositif collecteur de mousse (3).
  11. Procédé selon l'une quelconque des revendications 8 à 10, caractérisé en ce qu'une vitesse de sortie d'un fluide (F) fourni par l'au moins un élément répartiteur de fluide (4, 4a, 4b) et/ou la quantité dudit fluide est commandée ou réglée en se basant sur au moins une propriété du produit moussant (SP), prise dans le groupe comprenant :
    - une couleur du produit moussant (SP),
    - une dimension des bulles du produit moussant (SP),
    - une forme des bulles du produit moussant (SP),
    - une vitesse de désintégration des bulles du produit moussant (SP),
    - une vitesse de transport des bulles du produit moussant (SP).
  12. Procédé selon l'une quelconque des revendications 8 à 11, caractérisé en ce qu'une position verticale de l'au moins un élément répartiteur de fluide (4, 4a, 4b) est commandée ou réglée sur la base d'au moins une propriété du produit moussant (SP), prise dans le groupe comprenant :
    - une couleur du produit moussant (SP),
    - une dimension des bulles du produit moussant (SP),
    - une forme des bulles du produit moussant (SP),
    - une vitesse de désintégration des bulles du produit moussant (SP),
    - une vitesse de transport des bulles du produit moussant (SP).
  13. Utilisation d'un dispositif de flottation (1, 1', 1", 1"') selon l'une quelconque des revendications 1 à 7, prévue pour la flottation de particules de matière solide provenant d'une matière de valeur, en particulier un minerai métallique, à partir d'une suspension (S) ayant une teneur en matière solide dans la plage comprise entre 20 % et 50 %, en formant un produit moussant (SP).
EP11158298.7A 2011-03-15 2011-03-15 Dispositif de flottation avec un élément de distribution d'un fluide pouvant générer un courant du fluide vers le collecteur en mousse Not-in-force EP2500102B1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP11158298.7A EP2500102B1 (fr) 2011-03-15 2011-03-15 Dispositif de flottation avec un élément de distribution d'un fluide pouvant générer un courant du fluide vers le collecteur en mousse
MX2013010527A MX2013010527A (es) 2011-03-15 2012-03-01 Dispositivo de flotacion con un elemento distribuidor de fluido para generar una corriente dirigida hacia el dispositivo colector de espuma.
CA2830205A CA2830205A1 (fr) 2011-03-15 2012-03-01 Dispositif de flottation pourvu d'un element repartiteur de fluide pour produire un courant dirige vers l'appareil collecteur d'ecume
AU2012228575A AU2012228575A1 (en) 2011-03-15 2012-03-01 Flotation device comprising a fluid distribution element for generating a flow that is directed at the foam collecting unit
RU2013145953/03A RU2013145953A (ru) 2011-03-15 2012-03-01 Флотационное устройство с элементом для распределения текучей среды для создания направляемого в пеносборное устройство потока
US14/005,204 US20140001102A1 (en) 2011-03-15 2012-03-01 Flotation device comprising a fluid distribution element for generating a flow that is directed at the foam collecting unit
BR112013023569A BR112013023569A2 (pt) 2011-03-15 2012-03-01 "dispositivo de flutuação, método para descarregar um produto de espuma formado em um dispositivo de flutuação e uso de um dispositivo de flutuação"
CN201280013047.0A CN103429352B (zh) 2011-03-15 2012-03-01 具有用于产生指向泡沫收集装置的流动的流体分配件的浮选装置
PCT/EP2012/053491 WO2012123258A1 (fr) 2011-03-15 2012-03-01 Dispositif de flottation pourvu d'un élément répartiteur de fluide pour produire un courant dirigé vers l'appareil collecteur d'écume
CL2013002537A CL2013002537A1 (es) 2011-03-15 2013-09-03 Dispositivo de flotacion porque comprende una carcasa con una camara de flotacion para recibir una suspension y con al menos una entrada para la suspension asi como al menos un dispositivo colector de espuma para recibir y evacuar un producto de espuma; procedimiento para evacuar un producto de espuma.
ZA2013/06811A ZA201306811B (en) 2011-03-15 2013-09-10 Flotation device comprising a fluid distribution element for generating a flow that is directed at the foam collecting unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11158298.7A EP2500102B1 (fr) 2011-03-15 2011-03-15 Dispositif de flottation avec un élément de distribution d'un fluide pouvant générer un courant du fluide vers le collecteur en mousse

Publications (2)

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EP2500102A1 EP2500102A1 (fr) 2012-09-19
EP2500102B1 true EP2500102B1 (fr) 2015-11-11

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Country Status (11)

Country Link
US (1) US20140001102A1 (fr)
EP (1) EP2500102B1 (fr)
CN (1) CN103429352B (fr)
AU (1) AU2012228575A1 (fr)
BR (1) BR112013023569A2 (fr)
CA (1) CA2830205A1 (fr)
CL (1) CL2013002537A1 (fr)
MX (1) MX2013010527A (fr)
RU (1) RU2013145953A (fr)
WO (1) WO2012123258A1 (fr)
ZA (1) ZA201306811B (fr)

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RU2619624C2 (ru) * 2015-03-13 2017-05-17 Валерий Валентинович Морозов Устройство для регулирования процесса флотации и флотоклассификации
CN109195921A (zh) 2016-05-09 2019-01-11 荷兰联合利华有限公司 用于净化废水的设备和方法
US11484815B2 (en) 2017-11-07 2022-11-01 Hewlett-Packard Development Company, L.P. Froth coalescing
WO2019094461A1 (fr) * 2017-11-08 2019-05-16 Btu International, Inc. Dispositifs, systèmes et procédés d'élimination d'écoulement à partir de gaz de traitement de four
CN107983529B (zh) * 2017-11-27 2020-06-02 中国地质科学院矿产综合利用研究所 一种从深海沉积物中提取稀土的方法
US20210300789A1 (en) * 2017-12-09 2021-09-30 OPEC Remediation Technologies Pty Limited Method And Apparatus For Separation Of A Substance From Water
CN109589649B (zh) * 2018-11-20 2020-06-05 浙江大学 一种反气泡运输装置和方法
SE543716C2 (en) * 2019-05-17 2021-06-29 Bjoerks Rostfria Ab Apparatus, system and methods for water processing
CN110064522A (zh) * 2019-05-30 2019-07-30 贵州大学 一种低品位磷矿自动控制浮选装置
CN114011586B (zh) * 2021-11-05 2024-08-09 赖江川 一种基于矿浆高度进行分离的浮游矿选机

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CA2830205A1 (fr) 2012-09-20
ZA201306811B (en) 2014-08-27
AU2012228575A1 (en) 2013-09-26
CN103429352A (zh) 2013-12-04
EP2500102A1 (fr) 2012-09-19
CN103429352B (zh) 2016-02-03
WO2012123258A1 (fr) 2012-09-20
BR112013023569A2 (pt) 2016-12-06
US20140001102A1 (en) 2014-01-02
MX2013010527A (es) 2013-10-07
CL2013002537A1 (es) 2014-03-21
RU2013145953A (ru) 2015-04-20

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