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WO2022124941A1 - Machine pneumatique à colonne de flottaison - Google Patents

Machine pneumatique à colonne de flottaison Download PDF

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Publication number
WO2022124941A1
WO2022124941A1 PCT/RU2021/050404 RU2021050404W WO2022124941A1 WO 2022124941 A1 WO2022124941 A1 WO 2022124941A1 RU 2021050404 W RU2021050404 W RU 2021050404W WO 2022124941 A1 WO2022124941 A1 WO 2022124941A1
Authority
WO
WIPO (PCT)
Prior art keywords
structural element
trapezoid
flotation
diameter
ring
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.)
Ceased
Application number
PCT/RU2021/050404
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English (en)
Russian (ru)
Inventor
Марк Григорьевич ВИДУЕЦКИЙ
Игорь Фагамьянович ГАРИФУЛИН
Александр Петрович ПУРГИН
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.)
Obshchestvo S Ogranichennoi Otvetstvennostiu <<ra Grup>>
Original Assignee
Obshchestvo S Ogranichennoi Otvetstvennostiu <<ra Grup>>
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 Obshchestvo S Ogranichennoi Otvetstvennostiu <<ra Grup>> filed Critical Obshchestvo S Ogranichennoi Otvetstvennostiu <<ra Grup>>
Publication of WO2022124941A1 publication Critical patent/WO2022124941A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B03D1/24—Pneumatic

Definitions

  • the utility model relates to the field of mineral processing, namely, pneumatic flotation devices for processing mineral and technogenic raw materials containing non-ferrous, ferrous, rare, precious metals, non-metallic minerals, as well as for treating dump and waste water.
  • Known pneumatic flotation machine (RF No. 2038865) DE
  • the machine includes a chamber with an aerator located in it, a foam threshold, a loading device in the form of a pipe with holes and a circulation pipe.
  • the disadvantage of this machine is that the increase in the extraction of the useful component into the concentrate is carried out due to the multiple circulation of the feedstock, thereby reducing the productivity of the machine.
  • Known pneumatic flotation machine (WO 2006/061265 A1) D2, including a cylindrical body consisting of an expanded upper and lower parts, a transitional part between them in the form of a truncated cone, a bottom conical part, feeding, aerating and unloading devices, a foam collector made in the form gable chute and equipped with nozzles for removing the foam product, located opposite each other.
  • the diameter of the upper expanded part of the machine body is determined by the mathematical dependence on the height of the machine body and the diameter of its lower cylindrical part.
  • the disadvantage of this machine is the non-optimal conditions for the contact of mineral particles with air bubbles in the lower part of the machine body, which leads to insufficient extraction of difficult-to-float particles in the lower cylindrical part of the body.
  • a flotation pneumatic column machine (RF patent No. 2281169) DZ, including a body consisting of a cylindrical upper expanded and lower parts, a transitional part between them in the form of a truncated cone, a bottom conical part, a supply, aerating and unloading devices, a foam collector, a structural element in the form of a ring, located on the inner surface of the lower cylindrical part of the housing at the border with the transitional part, the cross section of which is an equilateral triangle, the top of which is directed towards the central axis of the machine.
  • the structural element reduces the angle of collision of mineral particles descending and emerging air bubbles from 180 0 to 90-135°.
  • the disadvantage of this solution is the absence of a zone with an increased concentration of air bubbles in the lower cylindrical part of the body, which leads to insufficient extraction of difficult-to-float particles.
  • the technical result of the proposed utility model is to increase the recovery of difficult-to-float particles in order to increase the total recovery of the useful component in the foam product of the flotation machine, by increasing the zone with a high concentration of air bubbles.
  • the flotation column pneumatic machine includes a housing containing a cylindrical expanded upper part, a lower cylindrical part, a transitional part located between the upper and lower parts, a bottom part made in the form of a cone and connected to the lower part, the upper part of the body contains feeding and aerating devices in the form of ejectors, a foam collector, and a central pipe is fixed inside the upper part, the lower part of the body contains aerating devices made with the possibility of vertical movement and fixation at a given immersion depth, while on the inner surface of the lower On the cylindrical part of the housing, at the border with the transition part, there is a structural element in the form of a ring, the cross section of which is a vertically located trapezoid, the smaller base of which is directed towards the center of the ring.
  • the figure 1 shows a General view of the claimed flotation machine.
  • the figure 2 shows an enlarged sectional view of the lower cylindrical part of the housing at the border with the transition part with a structural element.
  • FIG. 1 shows a general view of the flotation machine, which includes the upper extended part of the body - the main flotation chamber 1, equipped with feeding and aerating devices - ejectors 2, a single or multi-slope froth chute 3, equipped with nozzles for removing the foam product 4, a central pipe 5, a transitional part of the body 6, the lower part of the body 7, equipped with aerating devices 8 with the possibility of their vertical movement and fixation at a given immersion depth, the bottom part of the body 9, equipped with a bottom unloading device 10.
  • a structural element 11 in the form of a ring, the cross section of which is a vertically located trapezoid, the smaller base of which is directed towards the center of the ring.
  • the angle of inclination of the sides of the trapezoid to its expanded base is 45°.
  • the height of the specified zone H is equal to the length of the smaller base of the trapezoid, the diameter d is equal to the inner diameter of the ring.
  • the concentration of air bubbles formed in the lower level aerators and floating up during the passage of this zone increases due to a decrease in the cross-sectional area, which causes an increase in the intensity of their contact with mineral particles and increases the likelihood of fixing hard-floating mineral particles on air bubbles.
  • the flotation machine works as follows.
  • the slurry pre-treated with reagents enters through the upper level ejectors 2 into the upper expanded part of the body 1.
  • air enters the upper level ejectors 2, which comes into contact with the easily floatable pulp grains, forming air floccules. Aeroflocculi floating up, form a foamy product.
  • the foam product is unloaded into the foam collector 3 and sent to subsequent operations. Difficult-floating and non-floating mineral grains pass through the transitional part 6 of the body, and enter the zone of intense contact with air bubbles, limited by the device 11 (Fig. 2, highlighted in gray).
  • Difficult-floating mineral grains are fixed on air bubbles, then float up into the upper expanded part of the body inside the central pipe 5 and are unloaded into the foam collector 3. Non-floating grains sink into the bottom part of the body 9 and are removed through the bottom unloading device.
  • the optimal diameter of the lower part of the cylindrical body of the flotation column depends on the amount of pulp passed through it, i.e. on the productivity of the machine for the initial pulp. As shown by the test results and operating experience, for the pilot flotation machine KFM-120 with an internal diameter of the lower part of the body of 0.11 m (taking into account the wall thickness of the machine body), the optimal performance for the initial pulp is from 1.5 to 2.0 m 3 /h, and for industrial flotation machine KFM-1400 with an internal diameter of the lower part of the body of 1.38 m (taking into account the wall thickness of the machine body) - from 170 to 240 m 3 /h.
  • the pulp throughput of the machine is determined by the cross-sectional area of the lower part of the machine body, the formula of which includes the diameter of the lower part of the body squared.
  • the empirical coefficient ki for determining the optimal inner diameter of a structural element in the form of a ring, the cross section of which is a vertically located trapezoid is chosen from 0.8 to 0.95.
  • the empirical coefficient k for determining the optimal height of the zone with an increased concentration of air bubbles was chosen from 0.15 to 0.20.
  • the inventive flotation machine with a structural element in the form of a ring, the cross section of which is a vertically located trapezoid was tested in the operation of the main copper flotation on a pilot flotation machine KFM-120 with an inner diameter of the lower cylindrical part of the body of 0.11 m (taking into account the wall thickness of the machine body) , in comparison with a similar machine with a structural element in the form of a ring, the cross section of which is a triangle.
  • the test results are presented in table 3.
  • Table 3 Test results of pilot flotation machines.
  • the results of table 3 indicate that when testing pilot flotation machines, the inventive design with a structural element in the form of a ring, the cross section of which is a vertically located trapezoid, made it possible to increase the total extraction of the useful component into the froth by 3.29% (abs.).
  • the inventive flotation machine with a structural element in the form of a ring, the cross section of which is a vertically located trapezoid, was also tested in the operation of the main copper flotation on an industrial flotation machine KFM-1400 with an inner diameter of the lower cylindrical part of the body of 1.38 m (taking into account the wall thickness of the machine body ), in comparison with a similar machine with a structural element in the form of a ring, the cross section of which is a triangle.
  • the test results are presented in table 4.
  • Table 4 Results of tests of industrial flotation machines.
  • the results of Table 4 indicate that when testing industrial flotation machines, the proposed design with a structural element in the form of a ring, the cross section of which is a vertically located trapezoid, made it possible to increase the total extraction of the useful component into the froth by 6.59% (abs.)

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Paper (AREA)

Abstract

L'invention concerne une machine pneumatique à colonne de flottaison comprenant un corps qui comprend une partie supérieure cylindrique élargie, une partie cylindrique inférieure, une partie de transition disposée entre les parties supérieure et inférieure, et une partie de fond se présentant sous forme d'un cône et connectée à la partie inférieure. La partie supérieure du corps comprend des équipements d'alimentation et d'aération sous forme d'éjecteurs, un collecteur de mousse, et un tube central est fixé dans la partie supérieure. La partie inférieure du corps comprend des équipements d'aération capables de se déplacer verticalement et venant se fixer à une profondeur d'immersion voulue. Sur la surface externe de la partie cylindrique inférieure du corps, à la limite de la partie de transition, se trouve un élément structurel en forme d'anneau dont la section transversale représente un trapèze disposé verticalement dont la petite base est orientée vers le centre de l'anneau.
PCT/RU2021/050404 2020-12-07 2021-12-01 Machine pneumatique à colonne de flottaison Ceased WO2022124941A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2020140111 2020-12-07
RU2020140111 2020-12-07

Publications (1)

Publication Number Publication Date
WO2022124941A1 true WO2022124941A1 (fr) 2022-06-16

Family

ID=81973583

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2021/050404 Ceased WO2022124941A1 (fr) 2020-12-07 2021-12-01 Machine pneumatique à colonne de flottaison

Country Status (1)

Country Link
WO (1) WO2022124941A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312070A1 (de) * 1983-04-02 1984-10-04 Klöckner-Humboldt-Deutz AG, 5000 Köln Flotationszelle
SU1297921A1 (ru) * 1985-10-22 1987-03-23 Грузинский политехнический институт им.В.И.Ленина Пневматическа флотационна колонна машина
RU2281169C1 (ru) * 2004-12-06 2006-08-10 Закрытое акционерное общество "Научно-производственный внедренческий центр "Уральский научно-исследовательский и проектный институт обогащения и механической обработки полезных ископаемых - Техника" (ЗАО НПВЦ "Уралмеханобр - Техника") Флотационная колонная пневматическая машина
EA035623B1 (ru) * 2019-05-27 2020-07-16 Общество С Ограниченной Ответственностью "Первый Горно-Металлургический Институт" Центробежная флотационная машина

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312070A1 (de) * 1983-04-02 1984-10-04 Klöckner-Humboldt-Deutz AG, 5000 Köln Flotationszelle
SU1297921A1 (ru) * 1985-10-22 1987-03-23 Грузинский политехнический институт им.В.И.Ленина Пневматическа флотационна колонна машина
RU2281169C1 (ru) * 2004-12-06 2006-08-10 Закрытое акционерное общество "Научно-производственный внедренческий центр "Уральский научно-исследовательский и проектный институт обогащения и механической обработки полезных ископаемых - Техника" (ЗАО НПВЦ "Уралмеханобр - Техника") Флотационная колонная пневматическая машина
EA035623B1 (ru) * 2019-05-27 2020-07-16 Общество С Ограниченной Ответственностью "Первый Горно-Металлургический Институт" Центробежная флотационная машина

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