US3752313A - Flotation apparatus - Google Patents

Flotation apparatus Download PDF

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Publication number
US3752313A
US3752313A US00226625A US3752313DA US3752313A US 3752313 A US3752313 A US 3752313A US 00226625 A US00226625 A US 00226625A US 3752313D A US3752313D A US 3752313DA US 3752313 A US3752313 A US 3752313A
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US
United States
Prior art keywords
agitator
cones
bars
perforated sheet
base plates
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.)
Expired - Lifetime
Application number
US00226625A
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English (en)
Inventor
J Watin
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.)
Societe Miniere et Metallurgique de Penarroya
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Societe Miniere et Metallurgique de Penarroya
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Publication of US3752313A publication Critical patent/US3752313A/en
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    • 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
    • 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
    • B03D1/245—Injecting gas through perforated or porous area

Definitions

  • flotation is a method for screening finely comminuted particles, which is widely used for the concentration of ores, coal, slimes, etc. Flotation is carried out in tanks through the bottom of which a pulp is introduced, this pulp being a mixture of water and the product to be treated, generally admixed with foaming agent and several other products.
  • agitator has been described in French Pat. No. 1,200,365 filed on Apr. 30, 1958.
  • This device comprises two series of agitating bars arranged following the generator lines of two coaxial and oppositely disposed cones. The ends of these bars are mounted on two circular bases pierced with holes to permit the circulation of the pulp.
  • the gas which is generally air, is preferably injected into the tank along the axis of the cones.
  • One of the objectives of the present invention is consequently to provide a flotation apparatus which involves a much lower consumption of energy without impairing efficiency.
  • Another objective of this invention is to provide such an apparatus which is simple, strong and inexpensive but ensures an excellent outstanding agitation.
  • a flotation apparatus as described above, wherein the agitator comprises a perforated sheet presenting the form of two coaxial and oppositely disposed frustums of cones joined along their small bases.
  • said perforated sheet envelopes at least partly a crossed bars agitator as described in the above-mentioned French Patent.
  • said perforated sheet is mounted along the large bases of the cones on two parallel circular plates which are provided with holes to permit the passage of the pulp.
  • both cones are chosen as a function of the kind of material to treat.
  • the gas necessary for the flotation is preferably injected into the pulp along the axis of the agitator.
  • FIG. 1 is a diagrammatic view, partly in cross-section, of an embodiment of the device
  • FIG. 2 is a similar view showing another embodiment of the device.
  • the agitator shown in FIG. 1 comprises a hollow shaft 1 which is used for the introduction of the aerating air.
  • shaft 1 Around shaft 1 are mounted two series of bars arranged following the generator lines 2 of a first cone, on the one hand, and following the generator lines 3 of a second cone, on the other hand.
  • These bars are covered on their whole length by a perforated sheet 4 fixed on them by any suitable means, like welding.
  • sheet 4 presents the same form as the external form of the assembly constituted by the two series of bars, i.e., the form of two coaxial and oppositely disposed frustums of cones joined along their small bases.
  • the ends of bars 2 and 3 are fixedly mounted on two circular plates 5 and 6 which are provided with holes 7 to permit the passage of the pulp.
  • the thickness of sheet 4 is l0 mm. It is provided with a regular pattern of holes the diameter of which is 40 mm and which are 40 mm apart from each other.
  • the apex angles of the cones following which the bars 2 and 3 are arranged are respectively about 30 and
  • an agitator of this type with a height of about 200 mm and a diameter of 440 mm was placed in a flotation tank of 1 m which was filled with water until its level above the bottom of the tank reached 1 meter. The agitator was rotated at 340 rpm. The consumption of energy was measured as a function of the amount of air injected, the latter being successively 0, 500 and 700 liters per minute. The results of these tests are given by Table 1 below, each numerical value being the average result of eight experiments.
  • the agitator shown in FIG. 2 comprises also the perforated sheet 4, the shape of which is also two coaxial and oppositely disposed frustums of cones 4a, 4b joined along their small bases.
  • This sheet is directly mounted on circular base-plates 5, 6, which are pierced to permit the passage of the pulp.
  • This assembly is rigidly mounted on shaft 1, like the device shown in FIG. 1, but bars 2 and 3 of FIG. 1 are not present in this embodiment.
  • the inner surface of sheet 4 can be provided with asperities or ribs or can be corrugated (not shown) in order to increase the agitation efficiency.
  • the parts of the agitator according to the invention can be coated with an abrasion-resistant material like rubber or plastic. They can also be wholly fabricated with such material.
  • a flotation apparatus comprising: a tank for holding a body of liquid pulp containing finely comminuted solids to be floated from suspension; an agitator rotatable in said tank; means for rotating said agitator; and means for flowing gas into the pulp along the axis of said agitator; said agitator comprising a shaft, two circular base plates mounted perpendicularly on said shaft, said base plates being parallel to each other and pierced with holes, and at least one perforated sheet between said base plates, said at least one perforated sheet lying on the surfaces formed by two coaxial and oppositely disposed frustums of cones, said cones joined along their small bases, the large bases of said cones meeting the outer edges of said two base plates.
  • said agitator further comprises two series of elongated agitating bars mutually spaced apart,- each series of elongated bars spaced apart from said shaft and arranged following the generator lines of two coaxial and oppositely disposed cones, said bars extending between said plates with their ends rigidly mounted on said plates; said bars positioned so that they at least partially contact said at least one perforated sheet.
  • a flotation apparatus according to claim 1 wherein said at least one perforated sheet is shaped in the form of two coaxial and oppositely disposed frustums of cones joined along their small bases, the large base of each cone being respectively fixed along the outer edges of said base plates.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Paper (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US00226625A 1971-02-19 1972-02-15 Flotation apparatus Expired - Lifetime US3752313A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7105710A FR2125210B1 (pt) 1971-02-19 1971-02-19

Publications (1)

Publication Number Publication Date
US3752313A true US3752313A (en) 1973-08-14

Family

ID=9072171

Family Applications (1)

Application Number Title Priority Date Filing Date
US00226625A Expired - Lifetime US3752313A (en) 1971-02-19 1972-02-15 Flotation apparatus

Country Status (18)

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US (1) US3752313A (pt)
AU (1) AU468207B2 (pt)
BE (1) BE779346A (pt)
BG (1) BG27059A3 (pt)
BR (1) BR7200902D0 (pt)
CA (1) CA973283A (pt)
CS (1) CS175426B2 (pt)
DD (1) DD94965A5 (pt)
DE (1) DE2206585B2 (pt)
ES (1) ES399413A1 (pt)
FR (1) FR2125210B1 (pt)
GB (1) GB1322476A (pt)
IT (1) IT949426B (pt)
PL (1) PL77487B1 (pt)
RO (1) RO55950A (pt)
SU (1) SU564778A3 (pt)
YU (1) YU35217B (pt)
ZA (1) ZA72967B (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4011163A (en) * 1975-06-19 1977-03-08 Fairbanks Fred A Water waste treatment
US4113624A (en) * 1975-08-14 1978-09-12 Societe Miniere Et Metallurgique De Penarroya Flotation apparatus with mechanical agitation
CN109225663A (zh) * 2018-11-21 2019-01-18 严园妹 一种降低结垢的浮选机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113617319B (zh) * 2021-08-02 2023-01-13 徐州莫大新材料科技有限公司 一种可降解土壤改良保水固体水生产用搅拌装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1374446A (en) * 1918-10-16 1921-04-12 William E Greenawalt Apparatus for treating liquids with gases
US1761136A (en) * 1926-09-01 1930-06-03 Southwestern Eng Co Mineral-flotation apparatus
US3067988A (en) * 1958-04-30 1962-12-11 Penarroya Miniere Metall Flotation with mechanical agitation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB248279A (en) * 1925-09-21 1926-03-04 Max Kraut Improvements in flotation apparatus
FR802504A (fr) * 1935-03-22 1936-09-07 Appareil de flottation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1374446A (en) * 1918-10-16 1921-04-12 William E Greenawalt Apparatus for treating liquids with gases
US1761136A (en) * 1926-09-01 1930-06-03 Southwestern Eng Co Mineral-flotation apparatus
US3067988A (en) * 1958-04-30 1962-12-11 Penarroya Miniere Metall Flotation with mechanical agitation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4011163A (en) * 1975-06-19 1977-03-08 Fairbanks Fred A Water waste treatment
US4113624A (en) * 1975-08-14 1978-09-12 Societe Miniere Et Metallurgique De Penarroya Flotation apparatus with mechanical agitation
CN109225663A (zh) * 2018-11-21 2019-01-18 严园妹 一种降低结垢的浮选机

Also Published As

Publication number Publication date
PL77487B1 (pt) 1975-04-30
DD94965A5 (pt) 1973-01-12
AU468207B2 (en) 1973-08-23
YU36772A (en) 1980-04-30
RO55950A (pt) 1974-03-01
FR2125210A1 (pt) 1972-09-29
BG27059A3 (bg) 1979-08-15
ZA72967B (en) 1972-10-25
CA973283A (en) 1975-08-19
IT949426B (it) 1973-06-11
GB1322476A (en) 1973-07-04
ES399413A1 (es) 1974-10-16
AU3902972A (en) 1973-08-23
YU35217B (en) 1980-10-31
BR7200902D0 (pt) 1973-06-05
FR2125210B1 (pt) 1975-11-21
DE2206585B2 (de) 1973-10-25
CS175426B2 (pt) 1977-05-31
BE779346A (fr) 1972-05-30
DE2206585A1 (de) 1972-08-31
SU564778A3 (ru) 1977-07-05
DE2206585C3 (pt) 1974-05-30

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