WO2008019983A2 - Procédé pour régler l'état fonctionnel d'une cellule de flottaison et cellule de flottation - Google Patents

Procédé pour régler l'état fonctionnel d'une cellule de flottaison et cellule de flottation Download PDF

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Publication number
WO2008019983A2
WO2008019983A2 PCT/EP2007/058254 EP2007058254W WO2008019983A2 WO 2008019983 A2 WO2008019983 A2 WO 2008019983A2 EP 2007058254 W EP2007058254 W EP 2007058254W WO 2008019983 A2 WO2008019983 A2 WO 2008019983A2
Authority
WO
WIPO (PCT)
Prior art keywords
flotation cell
control
suspension
controlling
characteristic
Prior art date
Application number
PCT/EP2007/058254
Other languages
German (de)
English (en)
Other versions
WO2008019983A3 (fr
Inventor
Michael Riebensahm
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2008019983A2 publication Critical patent/WO2008019983A2/fr
Publication of WO2008019983A3 publication Critical patent/WO2008019983A3/fr

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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
    • B03D1/14—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
    • B03D1/02—Froth-flotation processes
    • B03D1/028—Control and monitoring of flotation processes; computer models therefor

Definitions

  • the invention relates to a method for controlling the operating state of a flotation cell and a flotation ⁇ cell.
  • Flotation is a separation process for mixtures of solid particles.
  • a liquid suspension through which gas bubbles flow the different interfacial tension of solid particles to be separated from liquids and gases is utilized.
  • the differentecknbenetzbar ⁇ ness of the solid particles in the suspension with the result that wetted particles fall, while small, un- crosslinked particles attach to gas bubbles and float them to the surface of the suspension.
  • the process is operated in so-called flotation cells, which are provided with devices for feeding in the solid particle mixture, for fumigation and mixing of the suspension, for skimming the foam on the suspension surface and also for removing solids from the bottom region of the cell.
  • Gas content, bubble size and drift velocity of Gasblä ⁇ rule in the suspension have an impact on the effectiveness of the separation process and can be affected both by the re ⁇ gelung the mixing of the suspension, for example by adjusting the speed of a rotor and by controlling the gas supply.
  • Known measuring methods for determining the gas content, bubble size and drift velocity of the gas bubbles are based on laser Doppler anemometry and ultrasonic Doppler and sonar wave sensors. All these methods are characterized by the emission of waves, namely light or sound waves and the recording and analysis of an echo, which due to the reflection of the Waves on the surfaces of the moving gas bubbles is formed and measured with a suitable sensor.
  • the measured signals also contain waves reflected by solid particles, so that the evaluation of the measurement and regulation of the system must be realized by complex software. So ⁇ probably the transmitter and sensors as well as the control including the software are very expensive.
  • the object of the invention is to develop a crizverfah- proceedings for operation of a flotation cell, which allows the USAGE ⁇ -making cost-effective sensors. Another object is to provide suitable Vorrich ⁇ tions for carrying out this method.
  • the first object is achieved by a method according to claim 1.
  • the second object is achieved by a flotation cell according to claim 5.
  • the own sound signal shall cover the ⁇ operating noise of the flotation cell and possibly housessgehoff ⁇ cal. In this way, the optimum operating point for the recovery of the maximum can be determined on ore and set in combination with gewonne ⁇ nen analysis results.
  • a cost-effective acoustic measuring transducer approximately in the form of a Microphones optionally an ultrasound microphone is sufficient.
  • the recorded eigen sound signals can be in a simple manner, for example ⁇ with the aid of an analog-to-digital conversion, to further processing digital signal processing in order to generate a control signal, for example for the gas content of the suspension.
  • self-sound signals are extracted, which are defined by a gas content in the suspension, the bubble size in the suspension, the bubbles drift velocity in the suspension, the gas inlet velocity in the suspension or the foam drainage rate of the resulting on ⁇ basic flotation foam.
  • This allows timely control and / or regulation of the operation of the flotation cell.
  • flotation cells for the separation of solid particle mixtures in a suspension, in particular during ore preparation, it is attempted to keep the foam or foam bubbles produced by the gas introduced as stable as possible. This is necessary to dissipate the foam from the flotation cell effi ⁇ cient.
  • a particular desired Stabili ⁇ ty of the foam for example.
  • a manipulated variable by a cha ⁇ rakter Vietnameses feature of the self-recorded sound signal is correlated with the reference signal sets of characteristic operating conditions.
  • Reference signal sets are measurement signal sets of characteristic operating states whose operating parameters, manipulated variables and possibly also measured variables are known. They may have been determined and in a reference table the operating parameters and manipulated large and assigned metrics, for example, on a comparable investment by SET ⁇ development of defined operating states.
  • the manipulated variable is passed to an actuator, which influences the operation of the flotation cell. For example, to regulate the Gas content, the manipulated variable a valve on the gasifier and thus adjust the gas supply.
  • a measured quantity is determined also by correlation of a characteris ⁇ tables characteristic of the recorded sound signal with own ⁇ Re ference signal sets of characteristic operating conditions.
  • a measure such as the gas content or the flow rate of the suspension, can operating personnel for loading, for monitoring purposes as indicated ⁇ to.
  • the eigen sound signal can be recorded in different ways, for example with the aid of a microphone immersed in the suspension or arranged above the suspension.
  • the structure-borne noise of the housing for example with a microphone fixed on its outer surface, is recorded.
  • a flotation cell for application of the described Rege ⁇ averaging method includes at least one acoustic Messauf ⁇ participants. This may be a cost-effective microphone, which is preferably fixed to receive the structure-borne noise of the housing on the outer surface.
  • This may be a cost-effective microphone, which is preferably fixed to receive the structure-borne noise of the housing on the outer surface.
  • the second object is also achieved by a control device for a flotation cell with a maschinenles ⁇ cash code, which comprises control and / or control commands which cause the control device for carrying out the above method.
  • the invention further extends to a maschinenlesba ⁇ ren program code for a device for controlling and / or regulating a flotation cell, which control and / or re yellow lacking comprises causing the control means for carrying out the above method.
  • the invention also includes a storage medium with a machine-readable program code stored thereon, which has control and / or regulating commands that cause the control device to carry out the above method.
  • FIG. 1 shows a flotation cell with acoustic sensors and control computer
  • Fig. 2 is a schematic diagram illustrating the sequence of a control method for a flotation cell.
  • FIG. 1 shows a flotation cell 1 for separating solid matter particle mixtures in a suspension 2 and a control circuit 3, for example for the gas content of the suspension 2.
  • This consists essentially of a carrier fluid, generally water and a solid particle mixture suspended therein, wherein if appropriate flotation ⁇ medium are included.
  • a gasifier 12 At the bottom 11 of the flotation cell 1 there is a gasifier 12, with which air bubbles are introduced into the suspension 2. Unoccupied particles attach to the gas bubbles and float with them to the suspension surface 5. On the other hand, wetted particles sink to the base 11 of the flotation cell 1.
  • a control circuit 3 before ⁇ hands In order to regulate the flotation cell 1 is a control circuit 3 before ⁇ hands. It comprises at least one acoustic sensor 21, which is arranged in the air space above the suspension, immersed in it or outside the housing 10 the flotation cell 1 is located, in particular on the outer ⁇ surface is fixed.
  • FIG. 1 shows by way of example the two last-mentioned sensors 21b, 21c.
  • the intrinsic sound signal 50 measured by a microphone (21 a, 21 b or 21 c) is sent to a computer 30 for recording and analysis. This examines the recorded Eigenschall ⁇ signal 50 on characteristic features and determines a manipulated variable 55, which is transmitted to an actuator on the Begaser 12 and in the case of the illustrated control circuit 3 of FIG. 1 adjusts the gas supply.
  • FIG. 2 shows a further flotation cell 1 equipped with a stirrer 13 and a detailed block diagram of a control circuit corresponding to the control circuit 3 in FIG. 1, for example for adjusting the gas content of the suspension 2.
  • the control circuit 3 comprises at least one of the illustrated sensors 21a, 21b , 21c for recording operating noises or eigen sound signals 50 of the flotation cell 1, a device 31 for signal recording and signal processing, a data correlation unit 32, a stored in a data ⁇ memory 33 reference table 34, an actuator 40 and a unit 42 to the measured variables -Presentation.
  • An intrinsic sound signal 50 measured by an acoustic sensor 21a, 21b or 21c is sent to a unit 31 for
  • Signal recording and signal processing passed and converted there in a measurement signal set 51.
  • the Signalaufberei ⁇ processing in the unit 31 may comprise a digitizing analog signals so that the recorded measured signal set 51 may be digitally stored and analyzed.
  • Measuring a signal set 51 is forwarded to a data correlation unit 32 wei ⁇ and analyzed by this for determination of the operation Para ⁇ meters, measurement and control variables 54, 55th This is done for example by evaluating the correlation between a measurement signal set 51 and prestored characteristic measurement signal sets operating states of the Flotationszel ⁇ le 1, hereinafter referred to as reference signal sets the ⁇ .
  • the reference signal sets can be used for the system as can be assumed and are linked in the data memory 33 in a reference table 34 with operating parameters, measured and manipulated variables.
  • a determined from the data correlation unit 32 measured variables ⁇ SSE 54 may be passed to a unit 42 for measuring sizes display and displayed there for the operating personnel.
  • This unit 42 may be a realized in the computer depicting ⁇ development unit or an external display unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)

Abstract

L'invention concerne un procédé pour régler un paramètre fonctionnel d'une cellule de flottation (1) qui comprend un logement et qui est utilisée pour séparer des quantités de particules solides dans une suspension (2). Selon ledit procédé, le signal sonore (50) individuel de la cellule de flottation (1), produit lors du fonctionnement, est reçu dans la cellule de flottation, une caractéristique caractérisant le paramètre fonctionnel est extrait du signal sonore (50) individuel reçu, et une variable réglable (55) destinée à régler le paramètre fonctionnel est déterminée à partir de la caractéristique caractérisée extraite.
PCT/EP2007/058254 2006-08-16 2007-08-09 Procédé pour régler l'état fonctionnel d'une cellule de flottaison et cellule de flottation WO2008019983A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610038208 DE102006038208A1 (de) 2006-08-16 2006-08-16 Verfahren zur Regelung des Betriebszustandes einer Flotationszelle und Flotationszelle
DE102006038208.0 2006-08-16

Publications (2)

Publication Number Publication Date
WO2008019983A2 true WO2008019983A2 (fr) 2008-02-21
WO2008019983A3 WO2008019983A3 (fr) 2008-04-10

Family

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PCT/EP2007/058254 WO2008019983A2 (fr) 2006-08-16 2007-08-09 Procédé pour régler l'état fonctionnel d'une cellule de flottaison et cellule de flottation

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DE (1) DE102006038208A1 (fr)
WO (1) WO2008019983A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10678207B2 (en) 2010-09-03 2020-06-09 CiDRA Corporate Service Inc. Method and apparatus for the control of a flotation separation process, including parameters of the flotation process and reagent addition to optimize mineral recovery
FI122475B (fi) * 2010-09-29 2012-02-15 Outotec Oyj Menetelmä metallurgisessa prosessissa käytettävän vaahdotuskoneen käyttämiseksi ja vaahdotuskone
DE102012212685A1 (de) * 2012-07-19 2013-10-10 Voith Patent Gmbh Verfahren zur Entfernung von Störstoffen aus einer wässerigen Faserstoffsuspension

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1642949A1 (de) * 1966-12-23 1972-03-16 Boliden Ab Verfahren und Vorrichtung zum kontinuierlichen Anreichern eines Materials aus einem das betreffende Material enthaltenden Gemisch
US5152175A (en) * 1990-11-14 1992-10-06 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Energy, Mines & Resources Bubble measurement cell
WO1997045203A1 (fr) * 1996-05-31 1997-12-04 Baker Hughes Incorporated Procede et appareil de commande de machines de flottation
WO2001003840A1 (fr) * 1999-07-09 2001-01-18 Commonwealth Scientific And Industrial Research Organisation Systeme de surveillances des ondes mecaniques emises par une machine en mouvement
WO2003008959A1 (fr) * 2001-07-19 2003-01-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede de flottation regulee de particules dispersees dans un liquide et dispositif de mise en oeuvre de ce procede
WO2003086978A1 (fr) * 2002-04-15 2003-10-23 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. Installation flottante pour purifier des eaux usees, et procede pour faire fonctionner une installation de ce type
WO2005098377A1 (fr) * 2004-03-16 2005-10-20 Tribo Flow Separations, Llc Instruments, systemes correspondants et procedes de surveillance ou de regulation du moussage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19903233B4 (de) * 1999-01-27 2005-08-04 Hrch. Huppmann Gmbh Brauereianlage mit akustischer Überwachung und Verfahren zur Steuerung oder Regelung einer Brauereinlage
DE10054924C2 (de) * 2000-11-06 2003-10-23 Basf Ag Verfahren zur Erfassung der Zellöffnung während der Schaumbildung in schaumbildenden Substanzen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1642949A1 (de) * 1966-12-23 1972-03-16 Boliden Ab Verfahren und Vorrichtung zum kontinuierlichen Anreichern eines Materials aus einem das betreffende Material enthaltenden Gemisch
US5152175A (en) * 1990-11-14 1992-10-06 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Energy, Mines & Resources Bubble measurement cell
WO1997045203A1 (fr) * 1996-05-31 1997-12-04 Baker Hughes Incorporated Procede et appareil de commande de machines de flottation
WO2001003840A1 (fr) * 1999-07-09 2001-01-18 Commonwealth Scientific And Industrial Research Organisation Systeme de surveillances des ondes mecaniques emises par une machine en mouvement
WO2003008959A1 (fr) * 2001-07-19 2003-01-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede de flottation regulee de particules dispersees dans un liquide et dispositif de mise en oeuvre de ce procede
WO2003086978A1 (fr) * 2002-04-15 2003-10-23 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. Installation flottante pour purifier des eaux usees, et procede pour faire fonctionner une installation de ce type
WO2005098377A1 (fr) * 2004-03-16 2005-10-20 Tribo Flow Separations, Llc Instruments, systemes correspondants et procedes de surveillance ou de regulation du moussage

Also Published As

Publication number Publication date
WO2008019983A3 (fr) 2008-04-10
DE102006038208A1 (de) 2008-02-21

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