[go: up one dir, main page]

WO2015175862A1 - Appareil à clapet pour cellules de flottation - Google Patents

Appareil à clapet pour cellules de flottation Download PDF

Info

Publication number
WO2015175862A1
WO2015175862A1 PCT/US2015/030942 US2015030942W WO2015175862A1 WO 2015175862 A1 WO2015175862 A1 WO 2015175862A1 US 2015030942 W US2015030942 W US 2015030942W WO 2015175862 A1 WO2015175862 A1 WO 2015175862A1
Authority
WO
WIPO (PCT)
Prior art keywords
flotation cell
valve
box
valve assembly
flotation
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/US2015/030942
Other languages
English (en)
Inventor
Alan Camomile
Mathew WALKER
Brad GERKE
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.)
FLSmidth AS
Original Assignee
FLSmidth AS
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 FLSmidth AS filed Critical FLSmidth AS
Priority to FI20165848A priority Critical patent/FI20165848A7/fi
Priority to CN201580025314.XA priority patent/CN106457262B/zh
Publication of WO2015175862A1 publication Critical patent/WO2015175862A1/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
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/07—Construction of housing; Use of materials therefor of cutting-off parts of tanks, e.g. tank-cars

Definitions

  • This invention relates to flotation cells, and more particularly to valve apparatus used to transfer slurry or pulp from one flotation cell tank to another flotation cell tank in a controlled fashion.
  • FIG. 1 describes performance characteristics of various conventional valve arrangements which have, to date, been used in conjunction with flotation apparatus.
  • existing valve apparatus designs for flotation apparatus utilize dart valves, but they exhibit certain limitations and disadvantages because of their physical configuration/arrangement.
  • One problem with existing downstream dart valve designs and/or configurations is that, as shown in FIG. 12, a flotation tank foundation needs to be shifted upstream or otherwise removed and/or elevated with concrete pilings and steel framework in order to allow clearance for downstream piping to connect to a subsequent downstream flotation tank. This poses engineering hurdles and possibly safety issues due to the significant weight of flotation cells filled with large amounts of slurry or pulp.
  • FIG. 13 Another problem with existing upstream dart valve designs and/or configurations is that, as shown in FIG. 13, slurry or pulp flow cannot be easily controlled between flotation tanks with a hinged design.
  • a hinged design provided to an upstream side of a flotation cell tank does not allow a dart to be re-sized for different applications or process changes.
  • the fluid dynamics change, because opening of the dart valve involves an arcuate path, rather than a linear path. Accordingly, flow rate is more difficult to control precisely, since bottom portions of a hinged dart valve open at a different rate than upper portions.
  • Such hinged designs advantageously facilitate installation, because no cutouts or foundation "shifting" or "pillaring" is necessary as with the design shown in FIG. 12.
  • hinged designs are also advantageous due to their low pressure drop between tanks.
  • such hinged designs may experience “misalignments” or “impingements” between the dart and the orifice.
  • hinged designs may experience longevity issues such as intermittent hinge failures due to large forces over extended time periods.
  • it is extremely difficult to change dart valve sizes i.e., one cannot replace a dart with a larger or smaller dart without changing the ability to close or open correctly or seal completely against the orifice grommet without interference).
  • Yet another problem with existing external valve apparatus is that, as shown in FIGS.
  • valve assembly piping and actuators are significantly pressurized (due to the head pressure of the adjacent tall flotation cells which are filled with heavy slurry or pulp), leaks may occur around seals, rings, and gaskets - particularly seals, gaskets, or rings which are positioned between two moving parts (e.g., actuator valve rod and sleeve).
  • FIG. 8 shows a leaking external dart valve design
  • FIG. 9 shows a failed stuffing box. While such apparatus do advantageously allow the valve apparatus to be maintained outside of a flotation cell, and afford linear (rather than arcuate) actuation of dart valve mechanisms, they are usually located underneath walkways and platforms making crane removal difficult.
  • FIG. 10 shows an external atmospheric design that has been used to remedy the problems associated with the external pressurized design shown in FIG. 11.
  • the external valve apparatus shown in FIG. 10 comprises a long pipe that extends upwards to allow pressure equalization to ambient conditions and to provide the ability to maintain and operate the mechanicals of the valve apparatus at ambient pressure above the fill level of the surrounding filtration tanks.
  • This elevated design is normally located underneath walkways and platforms making crane removal difficult. Moreover, it is still difficult to size dart valve components due to box geometries.
  • Yet other objects of some embodiments of the invention include providing a valve apparatus which exhibits a significantly improved ease of dart valve box replacement, refurbishment, operation, and/or maintenance. It is yet another object of some embodiments of the invention to more accurately calculate flow rate as a function of dart valve/valve rod lift.
  • a retro-fittable valve apparatus for a flotation cell may comprise a valve assembly having a dart attached to a distal end of a linear- actuated valve rod.
  • the valve assembly may be provided on an upstream side of the flotation cell.
  • the valve assembly may comprise a box which fluidly communicates with an upstream flotation cell.
  • the valve apparatus may further comprise a box outlet duct provided to the lower end of the box.
  • the valve apparatus may further comprise an inlet flange connected to an upstream portion of the box.
  • the inlet flange may be configured to seal the box from slurry or pulp within the flotation cell.
  • the inlet flange may be configured to connect to an outlet flange of said upstream flotation cell.
  • a method of flotation may comprise providing a valve assembly having a dart attached to a distal end of a linear- actuated valve rod.
  • the valve assembly may be provided on an upstream side of the flotation cell.
  • the valve assembly may comprise a box which fluidly communicates with an upstream flotation cell.
  • the valve rod may be linearly adjusted in order to increase or decrease a flow rate of slurry or pulp, for example, a flow rate of slurry or pulp between said flotation cell and said upstream flotation cell.
  • FIGS. 1-14 describe or illustrate various aspects of the prior art
  • FIG. 15 is a side cutaway view of a valve assembly according to some embodiments
  • FIG. 16 is an upper isometric view of a valve assembly according to some embodiments
  • FIG. 17 is a side cutaway view of a tank showing a placement of a valve assembly according to some embodiments
  • FIG. 18 is a close-up isometric view of a valve assembly according to some embodiments.
  • FIG. 19 is a first close-up cutaway view of a valve assembly according to some embodiments.
  • FIG. 20 is a second close-up cutaway view of a valve assembly according to some embodiments.
  • FIG. 21 is cutaway view of a valve assembly within a flotation circuit/cell bank according to some embodiments.
  • FIG. 22 is a close-up cutaway view of actuator mechanisms of a valve assembly according to some embodiments.
  • FIG. 23 is an isometric view showing a supporting structure of a valve assembly according to some embodiments.
  • FIG. 24 is a close-up cutaway view of actuator mechanisms of a valve assembly according to some embodiments.
  • FIG. 25 is a second close-up cutaway view of the actuator mechanisms of FIG. 24;
  • FIG. 26 is a cutaway view of a valve assembly according to some embodiments.
  • FIGS. 27 and 28 are partial cutaway view of a valve assembly showing the mechanicals of actuator mechanisms according to some embodiments
  • FIG. 29 shows a cutaway view of a valve assembly according to some embodiments.
  • FIGS. 30 and 31 show different isometric cross-sectional views of a valve assembly arrangement according to some embodiments.
  • first flotation cell tank 10 e.g., an "upstream” flotation cell tank
  • second flotation cell tank 20 e.g., an "upstream” flotation cell tank
  • the second flotation cell tank 20 may have a floor 21 and/or an angled lower baffle 22 as shown.
  • third, fourth, and/or fifth flotation cell tanks 20 may be provided downstream of the second flotation cell tank 20, in series, to form a cell bank/flotation circuit (e.g., a rougher/scavenger circuit).
  • the second flotation cell tank 20 comprises a valve assembly 30 at an upstream portion thereof, adjacent the outlet flange 49 of the first flotation cell tank 10 and most adjacent to an inlet flange 41 of the second flotation cell tank 20, which may extend radially inwardly into the second flotation cell tank 20 and radially outwardly of the second flotation cell tank 20 as shown.
  • the valve assembly 30 may extend vertically upward to an enclosure having an enclosure top panel 37, enclosure side panels 32, and an enclosure access panel 33.
  • a support structure 31, such as steel framework, may be used to support the valve assembly 30 adjacent the upstream side of the second flotation cell tank 20.
  • Additional frame 35 members may be used as necessary to distribute weight and/or load, and/or to support other flotation cell components which are not shown for clarity (e.g., motor, gearbox, rotor, stator, shaft, walking platforms, railings, housings, drives, air intakes, baffles, etc.).
  • other flotation cell components e.g., motor, gearbox, rotor, stator, shaft, walking platforms, railings, housings, drives, air intakes, baffles, etc.
  • the valve assembly 30 may comprise a first actuator 34 and/or a second actuator 36 - each of which may be disposed within the supported enclosure. While not shown, a single valve assembly 30 may be used, or multiple valve assemblies 30 may be used, wherein each valve assembly 30 may have at least one dart 60, orifice 66, and/or grommet 63 combination. In the instant case, the single valve assembly 30 comprises two dart 60/orifice 66/grommet 63 combinations.
  • a submersion box 48 comprising one or more box side panels 42, a box top panel 43, a box front panel 44, a lower mounting flange 45 configured to interface with a lower box outlet duct 46 may be provided.
  • the box 48 may take many shapes, forms, and/or sizes, and may comprise one or more curved box side panels 42, box top panel 43, box front panel 44, lower mounting flange 45, and/or inlet flange 41, without limitation.
  • a round box 48 (not shown) may be employed, without limitation; wherein a flat false bottom may be employed to the round box to facilitate mounting of grommet 63 and/or to facilitate the provision of orifice 66.
  • box 48 may comprise a tube or pipe-shaped chamber, rather than the rectangular chamber shown.
  • the lower box outlet duct 46 may be configured with an outlet duct opening 47 which may force flow of slurry or pulp from the first flotation cell tank 10 towards the floor 21 of the second flotation cell tank 20.
  • First 53 and second 57 valve rod housings may extend between the box 48 and the actuators as shown.
  • Valve rod housings 53, 57 may comprise one or more upper bushing boxes 52, 56 and/or one or more lower bushing boxes 54, 58, without limitation.
  • the bushing boxes 52, 54, 56, 58 (if utilized) may comprise annular bushings 55, such as HDPE bushings, UHMWPE bushings, bronze bushings, or the like, without limitation.
  • the bushings 55 may keep the valve rods 39 aligned within the valve rod housings 53, 57 and enable smooth linear travel of the valve rods 39 to actuate valve components.
  • a dart 60 portion of the valve assembly may be provided at the end of each valve rod 39.
  • the dart 60 may take many shapes, profiles, forms, and sizes - and may be constructed of many types of material (e.g., HDPE, UHMWPE, natural or synthetic rubber, or other polymer or combination thereof).
  • Each dart 60 may comprise an upper frustoconical surface 61 and a lower frustoconical surface 62 as shown.
  • the lower frustoconical surface 62 may be configured to mate with or operatively engage an orifice grommet 63 having a shape or profile which is complementary to the dart (e.g., circular as shown).
  • the valve when a dart 60 is forced against an orifice grommet 63, the valve may be closed off and restrict flow between the first and second flotation cell tanks 10, 20.
  • the orifice grommet 63 may take many shapes, profiles, forms, and sizes - and may be constructed of many types of material (e.g., HDPE, UHMWPE, natural or synthetic rubber, or other polymer or combination thereof).
  • the orifice grommet 63 preferably matches a profile of the corresponding dart 60.
  • One or more mounting fasteners 64 or features such as snap fits, quick connects, threaded interfaces, welds, adhesives, clamps, or the like may be utilized to connect the orifice grommet 63 to a mounting ring/flange 65.
  • mounting fasteners 64 or features such as snap fits, quick connects, threaded interfaces, welds, adhesives, clamps, or the like may be utilized to connect the orifice grommet 63 to a mounting ring/flange 65.
  • an orifice grommet 63 surrounds a pre-sized orifice 66 which allows the flow of slurry to enter into the second flotation cell tank 20 from the first flotation cell tank 10.
  • valve apparatus, valve assemblies, and/or components thereof may be provided in duplicates.
  • multiple flotation cells 20 may be provided in series and/or in parallel - and each of said multiple flotation cells 20 may incorporate the valve apparatus, valve assemblies, and/or components thereof.
  • one or more chamfers, curves, baffles, venturi, and/or other devices which may optimize the fluid dynamics between cell tanks 10 may be employed (though these are not shown for clarity).
  • such devices may be employed within the preceding flotation cell tank 10, for example, upstream of a box 48 of a flotation cell tank 20, without limitation. In some embodiments, such devices may be employed within a box 48 of a flotation cell tank 20, without limitation. In some embodiments, such devices may be employed upstream of an inlet flange 41 of a flotation cell tank 20, for example, upstream of an outlet flange 49 in a flotation cell tank 10.
  • the proposed design comprises a channel extending from a first flotation cell tank 10 and into a second flotation cell tank 20.
  • the channel extends far enough into the second flotation cell tank 20 that a linear dart valve may be provided therein.
  • the end of the channel is closed so as to prevent ingress of slurry into the second flotation cell tank 20 prior to escaping through the linear dart valve.
  • the linear dart valve comprises a dart valve assembly which may be actuated up and down in a generally vertical direction. Flow exiting the linear dart valve may pass between a dart 60 and grommet 63, through an orifice 66, into a lower outlet duct 46, and then into the second flotation cell tank 20.
  • a contractor or other entity may provide a flotation valve apparatus or operate a flotation valve apparatus in whole, or in part, as shown and described.
  • the contractor may receive a bid request for a project related to designing or operating a flotation valve apparatus, or the contractor may offer to design any number of valve apparatuses or components thereof, or a process for a client involving one or more of the features shown and described herein.
  • the contractor may then provide, for example, any one or more of the devices or features thereof shown and/or described in the embodiments discussed above.
  • the contractor may provide such devices by selling those devices or by offering to sell those devices.
  • the contractor may provide various embodiments that are sized, shaped, and/or otherwise configured to meet the design criteria of a particular client or customer.
  • the contractor may subcontract the fabrication, delivery, sale, or installation of a component of the devices disclosed, or of other devices used to provide said devices.
  • the contractor may also survey a site and design or designate one or more storage areas for storing the material used to manufacture the devices, or for storing the devices and/or components thereof.
  • the contractor may also maintain, modify, or upgrade the provided devices.
  • the contractor may provide such maintenance or modifications by subcontracting such services or by directly providing those services or components needed for said maintenance or modifications, and in some cases, the contractor may modify a preexisting flotation apparatus or valve apparatus of a flotation circuit, subassemblies thereof, components thereof, and/or parts thereof with one or more "retrofit kits" to arrive at a modified valve apparatus or method of operating a valve apparatus comprising one or more method steps, devices, components, or features of the systems and processes discussed herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • Mechanical Engineering (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Details Of Valves (AREA)
  • Sliding Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Centrifugal Separators (AREA)
  • Lift Valve (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

L'invention concerne un appareil à clapet pouvant être adapté pour une cellule de flottation comprenant : un ensemble clapet ayant une flèche fixée à une extrémité distale d'une tige de clapet à actionnement linéaire ; l'ensemble clapet étant disposé sur un côté amont de la cellule de flottation, l'ensemble clapet comprenant un boîtier qui est en communication fluidique avec une cellule de flottation amont. L'invention concerne également un procédé de flottation comprenant les étapes consistant à : utiliser un ensemble clapet ayant une flèche fixée à une extrémité distale d'une tige de clapet à actionnement linéaire ; l'ensemble clapet étant disposé sur un côté amont de la cellule de flottation, l'ensemble clapet comprenant un boîtier qui est en communication fluidique avec une cellule de flottation amont ; et ajuster linéairement la tige de clapet à actionnement linéaire afin d'augmenter ou de diminuer un débit de boue ou de pâte entre ladite cellule de flottation et ladite cellule de flottation amont.
PCT/US2015/030942 2014-05-15 2015-05-15 Appareil à clapet pour cellules de flottation Ceased WO2015175862A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20165848A FI20165848A7 (fi) 2014-05-15 2015-05-15 Jälkiasennettava venttiililaite flotaatiokennoa varten
CN201580025314.XA CN106457262B (zh) 2014-05-15 2015-05-15 用于浮选槽的阀装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201461993543P 2014-05-15 2014-05-15
US61/993,543 2014-05-15

Publications (1)

Publication Number Publication Date
WO2015175862A1 true WO2015175862A1 (fr) 2015-11-19

Family

ID=54480729

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/030942 Ceased WO2015175862A1 (fr) 2014-05-15 2015-05-15 Appareil à clapet pour cellules de flottation

Country Status (5)

Country Link
CN (1) CN106457262B (fr)
CL (1) CL2016002884A1 (fr)
FI (1) FI20165848A7 (fr)
PE (1) PE20161504A1 (fr)
WO (1) WO2015175862A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020008443A3 (fr) * 2018-07-06 2020-03-05 Flsmidth A/S Appareil à clapet pour cellules de flottation
US20210308694A1 (en) * 2020-04-03 2021-10-07 Freeport-Mcmoran Inc. Clawson-improved flotation valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112657684B (zh) * 2021-03-15 2021-07-09 矿冶科技集团有限公司 浮选中矿箱、浮选装置及浮选中矿箱配置方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679056A (en) * 1970-08-13 1972-07-25 Envirotech Corp Flotation apparatus
US4101174A (en) * 1977-03-25 1978-07-18 Continental Oil Company Slurry control system
US5965857A (en) * 1996-03-14 1999-10-12 Baker Hughes Incorporated Flotation cell row
US20030047213A1 (en) * 1997-07-01 2003-03-13 Cook Robert D. Flotation cell fluid level control apparatus
US7624877B2 (en) * 2003-03-17 2009-12-01 Outotec Oyj Separate size flotation device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002098256A (ja) * 2000-09-20 2002-04-05 Kurimoto Ltd フロート開閉式水位調整弁
CN202238332U (zh) * 2011-09-28 2012-05-30 长沙有色冶金设计研究院有限公司 一种浮选机组

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679056A (en) * 1970-08-13 1972-07-25 Envirotech Corp Flotation apparatus
US4101174A (en) * 1977-03-25 1978-07-18 Continental Oil Company Slurry control system
US5965857A (en) * 1996-03-14 1999-10-12 Baker Hughes Incorporated Flotation cell row
US20030047213A1 (en) * 1997-07-01 2003-03-13 Cook Robert D. Flotation cell fluid level control apparatus
US7624877B2 (en) * 2003-03-17 2009-12-01 Outotec Oyj Separate size flotation device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020008443A3 (fr) * 2018-07-06 2020-03-05 Flsmidth A/S Appareil à clapet pour cellules de flottation
US20210308694A1 (en) * 2020-04-03 2021-10-07 Freeport-Mcmoran Inc. Clawson-improved flotation valve

Also Published As

Publication number Publication date
CL2016002884A1 (es) 2017-04-21
PE20161504A1 (es) 2017-02-02
CN106457262A (zh) 2017-02-22
CN106457262B (zh) 2019-05-28
FI20165848A (fi) 2016-11-11
FI20165848A7 (fi) 2016-11-11

Similar Documents

Publication Publication Date Title
US10662816B2 (en) System and method to move turbomachinery
WO2015175862A1 (fr) Appareil à clapet pour cellules de flottation
CN110352299B (zh) 具有液体保留特性的机舱
KR101025876B1 (ko) 착탈식 시트와 케이지를 구비한 글로브 밸브
CN1671983B (zh) 锁闭装置
JP2022553993A (ja) 可変流路ウォータハンマー防止空気弁及び設計方法
JP2019064728A (ja) 油タンク水切りシステム
US9234325B1 (en) Combined turbine/generator installation on a dam
CN109723834A (zh) 一种重力阀门
JP5622113B2 (ja) ポンプユニット
WO2019221608A1 (fr) Système de traitement de production de pétrole et son procédé d'exploitation
CN103738905A (zh) 一种具有防溢管路的超低温装卸臂结构
KR101064749B1 (ko) 부양식 분수대
CN111556790A (zh) 用于将自然吸气浮选池转换为强制气体浮选池的方法及其设备
CN105242362B (zh) 一种基于盲插互连的多介质旋转铰链及其集成设计方法
KR101064748B1 (ko) 부양식 분수대
AU2023336073A1 (en) Valve flushing arrangement
CN109625485A (zh) 立体送料及油烟机多产线汇流总装生产系统
KR20150021303A (ko) ＣｏＧ 제어가 가능한 탑사이드 모듈 및 ＣｏＧ 제어를 통한 탑사이드 모듈의 리프팅 방법
JP5473154B2 (ja) 立軸ポンプ
US11635055B2 (en) Replacing a stub shaft bearing for a hydroelectric turbine using a runner hub lifting device
KR200398106Y1 (ko) 유압구동하치식 수문
DE102010026235B4 (de) Vorrichtung zur Gewichtsentlastung von Lagern für schwere Rotoren
JP7578548B2 (ja) 立軸ポンプ
CN102384093A (zh) 一种液下泵

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15793297

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 20165848

Country of ref document: FI

WWE Wipo information: entry into national phase

Ref document number: 002237-2016

Country of ref document: PE

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15793297

Country of ref document: EP

Kind code of ref document: A1