EP0815943A1 - Vorrichtung zur Durchführung eines Flotationsverfahrens - Google Patents

Vorrichtung zur Durchführung eines Flotationsverfahrens Download PDF

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Publication number
EP0815943A1
EP0815943A1 EP96110202A EP96110202A EP0815943A1 EP 0815943 A1 EP0815943 A1 EP 0815943A1 EP 96110202 A EP96110202 A EP 96110202A EP 96110202 A EP96110202 A EP 96110202A EP 0815943 A1 EP0815943 A1 EP 0815943A1
Authority
EP
European Patent Office
Prior art keywords
basin
liquid
opening
screw feeder
flotated
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.)
Withdrawn
Application number
EP96110202A
Other languages
English (en)
French (fr)
Inventor
Siro Viero
Ambrogio Bonacina
Barbara Bortot
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP96110202A priority Critical patent/EP0815943A1/de
Publication of EP0815943A1 publication Critical patent/EP0815943A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • B03D1/16—Flotation machines with impellers; Subaeration machines
    • B03D1/18—Flotation machines with impellers; Subaeration machines without air supply
    • 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 present invention relates to an apparatus for carrying out the process of flotation of solid substances in suspension according to the general part of claim 1.
  • the flotation process is used in several industrial fields such as treatment of minerals, for instance enrichment of mineral sulfides, purification operations of liquids being refluxed, in particular in the clarification phase.
  • the flotation process is based on the differences in properties of the free surfaces of several substances, some of which are hydrophilic and therefore are wetted completely by water and other substances which are more or less hydrophobic and therefore are not wetted.
  • the mixture of the substances In order to carry out a separation by flotation, the mixture of the substances must be in an aqueous suspension; then there are added some chemical substances which increase the degree of wettability in such a manner that the particles which have a tendency to be hydrophobic become completely hydrophobic while the hydrophilic substances remain the same.
  • the particles which are wetted are not brought to the surface and due to the force of gravity form a sediment at the bottom.
  • the concentrate which is obtained by flotation is periodically removed while the precipitate or sterile product is removed only at the end of the operation or periodically.
  • An object of the present invention is to provide an apparatus to carry out a flotation process with features novel with respect to the known apparatuses and in particular an apparatus which is characterized by minimum space and substantial capacity.
  • the crux of the present invention resides in an apparatus constituted substantially by two parts, a basin of circular cross section arranged with its axis horizontal and a screw feeder which is placed internally in the basin coaxially and contained within the basin. Further the screw feeder is placed in rotation by means of a gear motor which is located externally to the basin.
  • the basin is provided at one end with an opening for the introduction of the liquid to be treated and at the opposite end with a device for the removal of the material which has been flotated, and a reservoir for the decanted substances.
  • the basin is also provided with an exit of the clarified liquid as well as a device for the regulation of the level of the liquid being handled.
  • the apparatus comprises a basin (3) having a cylindrical shape and provided on top with opening (15).
  • a screw feeder (4) is placed in the interior of the basin.
  • the screw feeder is coaxial with the basin and is placed in rotation by means of a geared motor (9) which is integrally connected with the screw feeder and which is placed externally with respect to the basin.
  • the basin has at one extremity and in the lower part opening (1) for the introduction of the liquid to be treated, the liquid having been partially enriched with a mixture of water and air and with suitable chemical substances.
  • the liquid then is deposited in the flocculation chamber (2) from which it is uniformly diffused in the basin (3), filling the basin completely.
  • the basin has in the upper part a recovery system (7) for the material (14) which has been flotated, which is formed on the surface of the liquid being treated, and which is discharged in the adjacent collection cell (8).
  • a collection reservoir (12) for the materials (13) which are sterile or decanted In the lower part there is formed a collection reservoir (12) for the materials (13) which are sterile or decanted.
  • the reservoir is provided with a discharge device (11) which allows the discharge to the exterior in a discontinuous manner of the materials (13) by means of a pneumatic valve.
  • control device (5) controlling the level of the liquid, which determines the concentration of the flotated material (14) to be removed.
  • this process is favored and accelerated by the presence of the screw feeder which rotates and carries the flotated material (14) towards the collection cell (8) and simultaneously carries the decanted material (13) towards the collection reservoir (12).
  • the flotation process is favored and accelerated by the presence of the screw feeder because the speed of rotation of the screw feeder may be varied with respect to the speed of introduction of the liquid.
  • the optimum functional condition is achieved when the speed of rotation of the screw feeder is such that the apparent displacement of the propeller helix is perfectly equal to the speed of advance of the liquid being handled in the interior of the basin.
  • the screw feeder (4) accompanies the liquid without, however, pushing the liquid being handled towards the terminal part of the basin so as to achieve in this manner a series of inclined cells according to the direction of the spirals of the propeller helix with the result that an increase in the speed of flotation of the solids which are in suspension and which are contained in the same liquid is achieved.
  • the cylindrical shape of the basin (3) permits in the upper part to achieve a significant speed of ascent of the flotating material (14) and a contemporaneous increase in the concentration of the same material.
EP96110202A 1996-06-25 1996-06-25 Vorrichtung zur Durchführung eines Flotationsverfahrens Withdrawn EP0815943A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96110202A EP0815943A1 (de) 1996-06-25 1996-06-25 Vorrichtung zur Durchführung eines Flotationsverfahrens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96110202A EP0815943A1 (de) 1996-06-25 1996-06-25 Vorrichtung zur Durchführung eines Flotationsverfahrens

Publications (1)

Publication Number Publication Date
EP0815943A1 true EP0815943A1 (de) 1998-01-07

Family

ID=8222931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110202A Withdrawn EP0815943A1 (de) 1996-06-25 1996-06-25 Vorrichtung zur Durchführung eines Flotationsverfahrens

Country Status (1)

Country Link
EP (1) EP0815943A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107694905A (zh) * 2016-05-06 2018-02-16 合肥智慧龙图腾知识产权股份有限公司 一种矿业固体废弃物筛选装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR420008A (fr) * 1909-11-10 1911-01-20 Raoul Delplace Procédé de séparation des minerais et minéraux de leur gangue et impuretés, et particulièrement applicable à certaines blendes fluorées
GB275673A (en) * 1926-08-09 1928-11-09 Jean Francois Marie Reginald D Improved apparatus for the concentration of graphite and other ores by flotation
FR37243E (fr) * 1929-07-22 1930-11-03 Perfectionnement aux appareils et procédés pour la concentration des minerais
US2130144A (en) * 1934-08-13 1938-09-13 Mcclave James Mason Process of separating minerals, hydrocarbons, and the like from associated materials
US5091083A (en) * 1990-09-04 1992-02-25 Meylor Donald M Flotation separation system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR420008A (fr) * 1909-11-10 1911-01-20 Raoul Delplace Procédé de séparation des minerais et minéraux de leur gangue et impuretés, et particulièrement applicable à certaines blendes fluorées
GB275673A (en) * 1926-08-09 1928-11-09 Jean Francois Marie Reginald D Improved apparatus for the concentration of graphite and other ores by flotation
FR37243E (fr) * 1929-07-22 1930-11-03 Perfectionnement aux appareils et procédés pour la concentration des minerais
US2130144A (en) * 1934-08-13 1938-09-13 Mcclave James Mason Process of separating minerals, hydrocarbons, and the like from associated materials
US5091083A (en) * 1990-09-04 1992-02-25 Meylor Donald M Flotation separation system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107694905A (zh) * 2016-05-06 2018-02-16 合肥智慧龙图腾知识产权股份有限公司 一种矿业固体废弃物筛选装置
CN107716275A (zh) * 2016-05-06 2018-02-23 合肥智慧龙图腾知识产权股份有限公司 一种矿业固体废弃物筛选装置
CN107716275B (zh) * 2016-05-06 2020-05-29 深鹏环保工程有限公司 一种矿业固体废弃物筛选装置
CN107694905B (zh) * 2016-05-06 2020-05-29 江苏振强机械科技股份有限公司 一种矿业固体废弃物筛选装置

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