EP3560598A1 - Machine de broyage et de flottation - Google Patents

Machine de broyage et de flottation Download PDF

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Publication number
EP3560598A1
EP3560598A1 EP19171247.0A EP19171247A EP3560598A1 EP 3560598 A1 EP3560598 A1 EP 3560598A1 EP 19171247 A EP19171247 A EP 19171247A EP 3560598 A1 EP3560598 A1 EP 3560598A1
Authority
EP
European Patent Office
Prior art keywords
flotation cell
chamber
flotation
overflow
electromagnetic mill
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.)
Granted
Application number
EP19171247.0A
Other languages
German (de)
English (en)
Other versions
EP3560598B1 (fr
Inventor
Tomasz Gawenda
Dariusz FOSZCZ
Daniel Saramak
Damian KRAWCZYKOWSKI
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.)
Akademia Gomiczo Hutnicza
Original Assignee
Akademia Gomiczo Hutnicza
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Publication date
Application filed by Akademia Gomiczo Hutnicza filed Critical Akademia Gomiczo Hutnicza
Publication of EP3560598A1 publication Critical patent/EP3560598A1/fr
Application granted granted Critical
Publication of EP3560598B1 publication Critical patent/EP3560598B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/005—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls the charge being turned over by magnetic forces
    • 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
    • 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
    • B03D1/24—Pneumatic
    • B03D1/247—Mixing gas and slurry in a device separate from the flotation tank, i.e. reactor-separator type

Definitions

  • the subject of the invention is a crushing and flotation machine for use in processing raw materials and waste materials.
  • Flotation devices are commonly employed in ore processing plants to enrich mineral raw materials.
  • the offer of Flotation Machines for the Mining Industry, developed by Instytut Metali Niezelaznych in Gliwice: https://web.archive.org/web /20180425111320/http://www.imn.gliwice.pl/uploads/files/maszyny-flotacyjne_pl.pdf includes many flotation machines for various applications. Their design is essentially similar.
  • the flotation machine chamber is constructed as a cylindrical container with flat or conical bottom.
  • the waste chamber is located in the centre.
  • the feed is supplied through the feeding chamber located e.g. centrally in the top part of the flotation machine, to a space over the aerator.
  • the waste is discharged from the waste chamber located under the aerator.
  • the chamber side is fitted with a circumferential collective trough for foam products that is connected to radial troughs that receive the foam product.
  • the aerator the main task of which is to mix the pulp within the whole volume of the chamber, disperses pumped air for flotation and generates internal circulation of pulp. It consists of a rotor, balancer and balancer base.
  • Flotation machines include an operation stabilization and adjustment system comprised of a stabilization and adjustment unit of airflow to the aerator and a stabilization and adjustment unit of pulp in the chamber.
  • Electromagnetic mills are known wherein the milling process is performed within a fixed working chamber by means of agitating grinders that are ferromagnetic elements moving within a rotating electromagnetic field.
  • material to be ground is supplied to the working chamber by gravity, while flow of materials towards the working chamber outlet and collection of the product is also performed by the force of gravity and it is adjusted by way of working chamber inclination.
  • Polish patent application P.413041 A1 discloses a dry grinding process in an electromagnetic mill with vertical working chamber wherein the material to be ground is supplied by gravity from the top, directly over the working space of a mill that is equipped with rotating agitating grinders.
  • the controlled main stream of gaseous medium, wherein the grinding takes place and that forces reception of the final product, is supplied from the bottom of the working chamber of the mill, below its working space, preferably using negative pressure, hence ensuring rotational movement within the working space of the mill.
  • polish patent application P.413042 A1 is of a method of parametrization of pneumatic sorting integrated with a mill wherein the change of grain size is performed by the change of the height hi of the sorting chamber and the level of dispenser opening (multi-sectional preferably) for the collective return flow, and by the change of the height h 2 of the recycled material forming chamber.
  • the concept of a crushing and flotation machine that includes an electromagnetic mill with a vertical working chamber in which air is supplied from the bottom, consists in that the electromagnetic mill has an integrated flotation cell built within its top part so that the outlet collector of the electromagnetic mill is guided coaxially through the bottom of the flotation cell, equipped with a discharge nozzle with controlled adjustment valve.
  • the overflow step of the flotation cell is coaxially equipped with an overflow tank fitted with an overflow nozzle, however the suspended matter is fed from the bottom of the electromagnetic mill through a feeding stub pipe connected with a pump.
  • Controlled adjustment valve and pump are co-ordinated by means of signal cables or by a wireless method with a control unit which is, in turn, connected by means of signal cables or by a wireless method with a draff level sensor. It is preferred when the flotation cell chamber expands towards the top in order to contain more foam product.
  • the overflow tank bottom is inclined 3 to 45 degrees in relation to the horizontal plane. in order to facilitated the flow of foamy product. It is also preferred when the flotation cell bottom is inclined 3 to 45 degrees in relation to the horizontal plane. Moreover, it is preferred when the length of outlet collector end section, located within the flotation cell chamber, represents 1/4 to 1/3 of the distance between the top edge of the overflow step of the flotation cell chamber and the top edge of the outlet collector.
  • An undoubted advantage of the invention is the elimination of the aerator rotor for mixing the air with draff and reagents, as this was replaced by the agitating grinders moving about during the crushing activity. This advantage is related to energy savings and the lack of need to replace rotor-operating elements.
  • the device according to the invention is presented on a schematic drawing in Figure 1 .
  • Figure 2 the device according to the invention is shown as one of the elements of a larger system of devices performing the technological process of grinding and flotation.
  • the crushing and flotation machine consists of an electromagnetic mill assembly (3) in the form of a tube with circular cross-section that is fitted with a throat from the top that forms the outlet collector (5) and with air supplying holes (4) from the bottom, and a slurry supplying stub pipe connected to the pump (2).
  • the outlet collector (5) of the electromagnetic mill (3) is equipped concentrically with flotation cell (6) so that the outlet collector (4) passes through the flotation cell (6) bottom.
  • the flotation cell (6) is of tube shape with circular cross-section, however, its top part, representing foam tank, has larger diameter than the bottom part, and the change of dimension is gradual along the middle section.
  • the bottom of the flotation cell (6) is inclined 25 degrees to the horizontal plane and ends with an outflow nozzle (9) in the lowest section for a drowning material.
  • the outflow nozzle (9) is fitted with a controlled adjustment valve (10).
  • Length of the section hi of the outlet collector (5), within the flotation cell (6), is 0.3 of the length h 2 between the top edge of the overflow step (7) of the flotation cell (6) chamber and the top edge of the outflow collector (5) of the electromagnetic mill (3).
  • the overflow step (7) of the flotation cell (6) chamber is coaxially equipped with the overflow tank (17) in the form of a pipe of circular cross-section, the bottom of which is inclined 25 degrees from the horizontal plane and is fitted with the overflow nozzle (8) in the lowest section for foam product.
  • the flotation cell (6) chamber includes a draff (11) level sensor connected with the control unit, which, in turn, is connected with the controlled adjustment valve (10) and pump (2).
  • a draff (11) level sensor connected with the control unit, which, in turn, is connected with the controlled adjustment valve (10) and pump (2).
  • the method of its operation will be presented in an arrangement of devices performing a technological process of grinding and flotation
  • the feed together with water and flotation reagents is supplied to slurry tank (1), wherefrom it is pumped via the pump (2) under pressure to the vertical working chamber of the electromagnetic mill (3) wherein the raw material is crushed.
  • air is supplied to the slurry via holes (4), the bubbles of which are dispersed together with the slurry by means of moving agitating grinders within the working zone of the electromagnetic mill (3) chamber.
  • Crushed raw material in the form of flotation draff together with air bubbles flows through the outlet collector (5) of the electromagnetic mill (3) and is fed to the flotation cell (6), wherein it is separated as foam product and leaves the flotation cell via the overflow step (7) and then through the overflow nozzle (8), and the chamber product leaves the flotation cell via the outflow nozzle (9), the flow of which is adjusted using the controlled adjustment valve (10).
  • the foam product represents the final product of the crushing and flotation process.
  • Flotation draff flow rate is controlled via pump (2) output operation, which is controlled by means of a control unit based on draff (11) level sensor indications.
  • Adjustment of the pump (2) output is additionally synchronized with operation of the controlled adjustment valve (10) of the outflow nozzle (9), monitored also by the control unit.
  • the chamber product is then directed to the second slurry tank (12) wherefrom it is supplied, via the second pump (13), to the sorting hydrocyclone (14), wherein it is separated to overflow (14a) that is fed outside the system and outflow that is directed to the third tank (15) wherefrom it is discharged, using a stub pipe (15a), as waste, or a fraction containing usable components is pumped back using the third pump (16) to the slurry tank (1), wherefrom it is supplied to the crushing and flotation process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • Food Science & Technology (AREA)
  • General Engineering & Computer Science (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
EP19171247.0A 2018-04-27 2019-04-26 Machine de broyage et de flottation Active EP3560598B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL425396A PL236464B1 (pl) 2018-04-27 2018-04-27 Urządzenie do rozdrabniania i flotacji

Publications (2)

Publication Number Publication Date
EP3560598A1 true EP3560598A1 (fr) 2019-10-30
EP3560598B1 EP3560598B1 (fr) 2020-11-18

Family

ID=66290237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19171247.0A Active EP3560598B1 (fr) 2018-04-27 2019-04-26 Machine de broyage et de flottation

Country Status (2)

Country Link
EP (1) EP3560598B1 (fr)
PL (1) PL236464B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119634035A (zh) * 2024-12-31 2025-03-18 太原科技大学 一种搅拌磨矿联合浮选一体化装置及方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE888641C (de) * 1951-11-06 1953-09-03 Kohlenscheidungs Ges Mit Besch Mahlanlage mit frei beweglichen Mahlkoerpern in einem Mahlgehaeuse
US4134557A (en) * 1976-09-29 1979-01-16 I.O.S. Industria Ossidi Sinterizzati S.R.L. Device for propelling grinding bodies in a grinding mill
PL382610A1 (pl) 2007-06-08 2008-12-22 Politechnika Częstochowska Młyn elektromagnetyczny
CN201862462U (zh) * 2010-06-13 2011-06-15 中国铝业股份有限公司 一种立式螺旋搅拌磨矿浮选一体化设备
EP3025786A1 (fr) * 2014-11-28 2016-06-01 Omya International AG Appareil de broyage simultané et flottation par mousse
PL413042A1 (pl) 2015-07-06 2017-01-16 Politechnika Śląska Sposób parametryzacji klasyfikatora pneumatycznego zintegrowanego z młynem
PL413041A1 (pl) 2015-07-06 2017-01-16 Politechnika Śląska Sposób mielenia na sucho w młynie elektromagnetycznym

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE888641C (de) * 1951-11-06 1953-09-03 Kohlenscheidungs Ges Mit Besch Mahlanlage mit frei beweglichen Mahlkoerpern in einem Mahlgehaeuse
US4134557A (en) * 1976-09-29 1979-01-16 I.O.S. Industria Ossidi Sinterizzati S.R.L. Device for propelling grinding bodies in a grinding mill
PL382610A1 (pl) 2007-06-08 2008-12-22 Politechnika Częstochowska Młyn elektromagnetyczny
CN201862462U (zh) * 2010-06-13 2011-06-15 中国铝业股份有限公司 一种立式螺旋搅拌磨矿浮选一体化设备
EP3025786A1 (fr) * 2014-11-28 2016-06-01 Omya International AG Appareil de broyage simultané et flottation par mousse
PL413042A1 (pl) 2015-07-06 2017-01-16 Politechnika Śląska Sposób parametryzacji klasyfikatora pneumatycznego zintegrowanego z młynem
PL413041A1 (pl) 2015-07-06 2017-01-16 Politechnika Śląska Sposób mielenia na sucho w młynie elektromagnetycznym

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119634035A (zh) * 2024-12-31 2025-03-18 太原科技大学 一种搅拌磨矿联合浮选一体化装置及方法

Also Published As

Publication number Publication date
PL236464B1 (pl) 2021-01-25
EP3560598B1 (fr) 2020-11-18
PL425396A1 (pl) 2019-11-04

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