Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
NZ779048B2 - Method and apparatuses for screening - Google Patents
[go: Go Back, main page]

NZ779048B2 - Method and apparatuses for screening - Google Patents

Method and apparatuses for screening Download PDF

Info

Publication number
NZ779048B2
NZ779048B2 NZ779048A NZ77904818A NZ779048B2 NZ 779048 B2 NZ779048 B2 NZ 779048B2 NZ 779048 A NZ779048 A NZ 779048A NZ 77904818 A NZ77904818 A NZ 77904818A NZ 779048 B2 NZ779048 B2 NZ 779048B2
Authority
NZ
New Zealand
Prior art keywords
screen
screening
screen basket
openings
carbon
Prior art date
Application number
NZ779048A
Other versions
NZ779048A (en
Inventor
James R Colgrove
Clifford C Smith
Original Assignee
Derrick Corporation
Filing date
Publication date
Application filed by Derrick Corporation filed Critical Derrick Corporation
Publication of NZ779048A publication Critical patent/NZ779048A/en
Publication of NZ779048B2 publication Critical patent/NZ779048B2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B01D2201/0415—Details of supporting structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/184—Special form, dimension of the openings, pores of the filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4092—Threaded sections, e.g. screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1216—Pore size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B01D29/071—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets with curved filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/19—Supported filter elements arranged for inward flow filtration on solid frames with surface grooves or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/92—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
    • B01D29/925—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate containing liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0307—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements
    • B01D33/0315—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0307—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements
    • B01D33/033—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/044—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/74—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging filtrate
    • B01D33/742—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging filtrate containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/28—Strainers not provided for elsewhere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1692—Other shaped material, e.g. perforated or porous sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/185—Drum screens provided with exchangeable sieve panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4618—Manufacturing of screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4645—Screening surfaces built up of modular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4654—Corrugated Screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/469—Perforated sheet-like material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D28/00—Producing nets or the like, e.g. meshes, lattices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Abstract

Methods and apparatuses for screening are provided. Embodiments include a screen basket apparatus for screening carbon-in-pulp (CIP), carbon-in-leach (CIL), or resin-in-leach (RIL) material so as to retain carbon or resin on an external surface of the screen basket. The screen basket comprises a grid frame having a plurality of openings arranged in a lattice and a plurality of screening cartridge assemblies affixed to the grid frame to cover the respective openings of the grid frame. The screening cartridge assembly includes a case and a screen assembly fitted into the case, and may be affixed to a set of transversal member of the grid frame. The case may be an injection molded thermoplastic, polyurethane or a thermoset polymer. The screening elements together form a generally continuous screening surface across an exterior portion of the grid frame. The use of polyurethane or thermoplastic material for the screens is more durable and alleviates blinding of the openings during operation compared to wedge wire screens in the prior art.

Claims (67)

What we claim is:
1. A screen basket apparatus, comprising: a substantially vertical grid frame having a plurality of openings, the grid frame including a plurality of transversal members and a plurality of udinal members that define the plurality of openings; a screen attached to the outside of the grid frame, n the screen has a screening surface formed of polyurethane or a thermoplastic material, and n the screen is configured to be used in a carbon-in-leach (CIL), carbon-in-pulp (CIP), or resin-in-leach (RIL) system to thereby filter carbon or resin from a slurry of CIL, CIP or RIL material such that the carbon or resin is ed on an external surface of the screen.
2. The screen basket apparatus of claim 1, wherein the screening surface includes a thermoset material.
3. The screen basket apparatus of claim 1 or claim 2, wherein the screen includes a plurality of screening openings each having a length L that has a magnitude in a range from approximately 0.7 mm to approximately 2 mm, and a width W that has a magnitude in a range of about 35 microns to about 150 microns.
4. The screen basket apparatus of claim 1, wherein the screening surface is formed of a thermoplastic material.
5. The screen basket apparatus of claim 1, wherein the ing surface is formed of a polyurethane material.
6. The screen basket tus of any one of the ing claims, wherein the screen is a single injection-molded piece.
7. The screen basket apparatus of any one of the preceding claims, wherein the screening surface has a corrugated shape.
8. The screen basket apparatus of any one of the preceding claims, wherein the screen covers a plurality of the openings of the grid frame.
9. The screen basket apparatus of any one of claims 1 to 5, n the screen includes a plurality of separate screen members.
10. The screen basket apparatus of claim 9, wherein each of the separate screen members includes a molded body having screen gs and unperforated side edge portions, wherein each side edge portion includes a cast-in structural member that is configured to mechanically couple with a transversal member or a longitudinal member of the grid frame to thereby attach the separate screen member to the grid frame.
11. The screen basket apparatus of any one of the preceding claims, wherein the grid frame has a cylindrical configuration.
12. A screening apparatus, comprising: a screen assembly having a screening surface formed of polyurethane or a thermoplastic material, the screening surface having openings having sizes in a range from approximately 35 microns to approximately 1,000 s, wherein the screen assembly is configured to be attached to a frame of a screen basket such that the ing surface is d on the outside of the screen basket, wherein the screen basket is configured to be secured in a fixed vertical configuration, and the screening surface is configured to separate an oversize material from an undersize material by allowing undersize material to flow into the screen basket while preventing oversize material from entering the screen basket, and wherein the screening surface is configured to separate carbon or resin from a slurry of -in-leach (CIL), carbon-in-pulp (CIP) or resin-in-leach (RIL) al as fluid of the slurry flows from outside the screen basket to inside the screen basket due to a static pressure ential n fluid outside relative to fluid inside the screen basket such that carbon or resin is retained on the screening surface.
13. The screening apparatus of claim 12, further comprising: a case including a holder section and an attachment section, wherein the screen assembly is removably securable within the holder section, and the attachment section is ured to removably attach to the frame of the screen basket, wherein the screen assembly includes: a framework having structural members that form grid openings; and screen elements, secured to the framework and forming a screening surface.
14. The screening apparatus of claim 13, wherein the screen elements are formed of a thermoplastic material.
15. The screening apparatus of claim 13, n each of the screen elements comprises a single injection molded piece integrally formed by injection molding of a thermoplastic al.
16. The screening apparatus of any one of claims 13 to 15, wherein the case is a detachable case including a top case portion and a bottom case portion separable from the top case portion.
17. The screening apparatus of claim 16, n each of the top case portion and the bottom case portion includes one or more ment isms and one or more apertures, wherein each attachment mechanism of the top case portion is configured to detachably engage with a corresponding aperture of the bottom case portion, and wherein each attachment mechanism of the bottom case n is ured to detachably engage with a corresponding aperture of the top case portion.
18. The screen basket apparatus of claim 1, wherein the screen comprises multiple removable screens, and the ble screens are d over the openings of the grid frame, wherein the screens comprise screen elements having a screening surface , wherein the screens are located on the outside of the grid frame, and wherein the screening surface of each of the screens has screening openings that are configured to filter carbon or resin particles from a slurry of carbonin-leach (CIL), carbon-in-pulp (CIP) or resin-in-leach (RIL) material.
19. The screen basket apparatus of claim 18, wherein the screen elements are formed by injection molding.
20. The screen basket apparatus of claim 18 or claim 19, wherein the screen basket apparatus is configured to be used in a carbon-in-leach (CIL), carbon-in-pulp (CIP) or resin-in-leach (RIL) interstage screening system.
21. The screen basket apparatus of any one of claims 18 to 20, n the screening openings have a length L that has a magnitude in a range from about 300 microns to about 4000 s, and a width W that has a magnitude in a range of about 35 microns to about 4000 microns.
22. The screen basket apparatus of any one of claims 18 to 21, wherein the screen elements include surface elements having a thickness T that has a magnitude in a range from approximately 70 microns to imately 400 microns, and wherein the screen elements have an open screening area of approximately 5% to approximately 45% of a total area of the screening surface of the screens.
23. The screen basket apparatus of claim 22, n: the length L of the screening openings is approximately 0.0197 inches; the width W of the screening openings is approximately 0.0862 inches; and the surface element thickness T is imately 0.0104 inches.
24. The screen basket tus of claim 22, wherein: the length L of the screening openings is approximately 0.0315 inches; the width W of the screening openings is approximately 0.1244 inches; and the surface t thickness T is approximately 0.0315 inches.
25. The screen basket apparatus of claim 22, wherein: the length L of the screening openings is approximately 0.0394 inches; the width W of the screening openings is approximately 0.1574 inches; and the surface element thickness T is approximately 0.0506 inches.
26. The screen basket apparatus of any one of claims 18 to 25, n the screening surface is formed of a thermoset material.
27. The screen basket apparatus of any one of claims 18 to 25, wherein the screening surface is formed of a thermoplastic material.
28. The screen basket apparatus of any one of claims 18 to 27, wherein the ing surface has a corrugated shape.
29. A method of filtering, the method comprising: introducing a screening ly into a screening apparatus having a tank containing a slurry of carbon-in-pulp (CIP), carbon-in-leach (CIL) or resin-in-leach (RIL) material ning resin or ted carbon containing leached gold; and filtering the slurry through the screening assembly from outside the screening assembly to inside the screening assembly to thereby remove the resin or activated carbon from the slurry such that the resin or activated carbon is retained in the tank, wherein the screening assembly comprises screen elements that form a screening surface on the outside of the screening assembly, the screening surface being formed of polyurethane or a plastic material.
30. The method of claim 29, n the screen elements are formed by injection molding or hot casting.
31. The method of claim 29 or claim 30, wherein the screening surface is a thermoset material.
32. The method of claim 29 or claim 30, n the screening surface is formed of a thermoplastic material.
33. A method of claim 29, wherein the screening ly comprises a support structure; and wherein the screen elements are attached to the support structure.
34. The method of claim 33, n the screening surface is formed of a polyurethane material.
35. The method of any one of claims 33 to 34, wherein the screen elements each comprise a single injection-molded piece.
36. The method of any one of claims 33 to 35, wherein the screening surface has a corrugated shape.
37. The method of any one of claims 33 to 36, wherein the screen ts cover a plurality of gs of the support structure.
38. A ing apparatus, comprising: a screen, having a screening surface formed of polyurethane or a thermoplastic material, configured to be attached to a grid frame such that the screening surface is located on the outside of the grid frame, the screening surface configured to separate carbon or resin from a slurry of carbon-in-pulp (CIP), carbon-in-leach (CIL) or resin-in-leach (RIL) material as fluid of the slurry flows from outside the grid frame to inside the grid frame due to a static pressure differential between fluid outside the grid frame and fluid inside the grid frame such that carbon or resin is retained on the screening surface.
39. The screening apparatus of claim 38, wherein the ing surface includes a thermoset material.
40. The screening tus of claim 38 or claim 39, wherein the screen includes a plurality of screening openings each having a length L that has a magnitude in a range from approximately 0.7 mm to approximately 2 mm, and a width W that has a magnitude in a range of about 35 microns to about 150 microns.
41. The screen screening apparatus of claim 38, wherein the screening surface is formed of a thermoplastic al.
42. The screening apparatus of claim 38, wherein the screening surface is formed of a polyurethane material having openings having sizes in a range from approximately 35 s to approximately 4,000 microns.
43. The ing apparatus of any one of claims 38 to 42, wherein the screen is a single ion-molded piece.
44. The screening apparatus of any one of claims 38 to 43, wherein the screening surface has a corrugated shape.
45. The screening apparatus of any one of claims 38 to 44, wherein the screen covers a ity of openings of the grid frame.
46. The screening apparatus of any one of claims 38 to 42, wherein the screen includes a plurality of separate screen s.
47. The screening apparatus of claim 46, wherein each of the separate screen members es a molded body having screen openings and unperforated side edge portions, wherein each side edge portion includes a cast-in structural member that is configured to mechanically couple with a transversal member or a longitudinal member of the grid frame to thereby attach the separate screen member to the grid frame.
48. The screening apparatus of any one of claims 38 to 47, wherein the grid frame has a cylindrical configuration.
49. The screen basket apparatus of claim 1, wherein the screening e is configured to separate carbon or resin from a slurry of a carbon-in-leach (CIL), carbon-in-pulp (CIP) or resin-in-leach (RIL) material as fluid of the slurry flows from outside the screen basket apparatus to inside the screen basket tus due to a static pressure differential between fluid outside relative to fluid inside the screen basket apparatus.
50. The screen basket apparatus of claim 49, wherein the grid frame is a cylindrical grid frame and the screening surface includes a plurality of replaceable screen assemblies attached to the cylindrical grid frame.
51. The screen basket apparatus of claim 50, wherein the grid frame has a plurality of openings and each of the plurality of openings is configured to receive a respective one of the plurality of replaceable screen assemblies.
52. The screen basket tus of any one of claims 49 to 51, wherein the screening surface is ed to the grid frame with an attachment ism.
53. The screen basket apparatus of claim 52, wherein the attachment mechanism includes one or more screw or bolt holes ured to receive respective one or more screws or bolts to thereby secure the screening surface to the grid frame.
54. The screen basket apparatus of claim 51, wherein the screen assemblies are flexible and are each shaped to pressure fit into a respective one of the openings in the grid frame.
55. The screen basket tus of claim 54, wherein each screen assembly includes flexible attachment members that are configured to engage with and to pressure fit with adjacent transversal and/or longitudinal members to thereby secure the screen assembly to the grid frame.
56. The screen basket apparatus of any one of claims 49 to 55, wherein the screening surface includes openings having sizes in a range from imately 35 microns to approximately 4000 microns.
57. The screen basket apparatus of any one of claims 49 to 56, n the screening surface is formed of a polyurethane screen forming a screening surface facing outside the screen basket.
58. The screen basket apparatus of claim 57, wherein the polyurethane screen includes a plurality of first members that extend in a first direction and a ity of second members that extend in a second direction that is perpendicular to the first direction, wherein the screen openings are formed between the first and second members, and wherein the screen openings having a length of about 0.044 mm to about 4 mm between inner surfaces of the first members and a length of about 0.044 mm to about 60 mm between inner surfaces of the second members.
59. The screen basket apparatus of claim 57 or claim 58, wherein the first members and second members include reinforcement members molded integrally therewith.
60. The screen basket apparatus of claim 59, wherein the reinforcement members molded integrally with the first members have a thickness in a range from about 0.005 inches to about 0.015 inches, and wherein the reinforcement members molded integrally with the second members have a thickness in a range from about 0.015 inches to about 0.040 inches.
61. The screen basket apparatus of claim 49, n the screening surface includes a plurality of screen elements, each screen element ing a single injection molded piece integrally formed by ion molding of a thermoplastic material, and wherein the screen elements include a substantially planar ing e having multiple elongated screening
62. The screen basket apparatus of claim 61, wherein each of the multiple elongated screening openings have a substantially uniform length and a substantially uniform width, and wherein the substantially uniform length has a magnitude in a range from about 300 µm to about 4000 µm, and the substantially uniform width has a magnitude in a range of about 35 µm to about 4000 µm.
63. The screen basket apparatus of claim 62, n the substantially uniform width has a magnitude approximately equal to one of 43 µm, 74 µm, 90 µm, 125 µm, 150 µm, 180 µm, 500 µm, and 700 µm.
64. The screen basket apparatus of claim 1, wherein the screen comprises a plurality of independent replaceable screen assemblies, each screen assembly including a screening surface, wherein each of the plurality of openings is configured to receive a respective one of the plurality of independent replaceable screen assemblies, and wherein the screening surfaces of the independent replaceable screen assemblies are configured to separate carbon or resin from a slurry of a carbon-in-leach (CIL), carbon-in-pulp (CIP) or resin-in-leach (RIL) material as fluid of the slurry flows from outside the screen basket apparatus to inside the screen basket apparatus, due to a static pressure differential between fluid outside relative to fluid inside the screen basket tus.
65. The screen basket apparatus of claim 64, wherein at least one of the plurality of openings includes an attachment mechanism configured to secure at least one of the independent eable screen assemblies to the at least one of the plurality of openings.
66. A method of screening, comprising: introducing a screen basket apparatus into a slurry of carbon-in-leach (CIL), carbon-inpulp (CIP) or resin-in-leach (RIL) al, the screen basket apparatus having a substantially vertical cylindrical frame and a screening surface secured to the frame, the screening surface being formed of ethane or a thermoplastic al; generating a static re differential n fluid outside the screen basket apparatus relative to fluid inside the screen basket tus to thereby cause fluid of the slurry to flow from outside the screen basket apparatus to inside the screen basket apparatus; and screening the al such that carbon or resin of the slurry is retained on an external surface of the screening e.
67. The screen basket apparatus of claim 66, wherein the cylindrical frame is a grid frame and the screening surface includes a plurality of replaceable screen assemblies attached to the grid frame. 511 510 531 530 O 7, 7 7 . E E E W , , W , , 10 oo 530 '3 i: i i 10 ,, 600 10 Z. " ° 1O ,, , , 1 0 . FIG 3 1 4 i i a 16 : : : i 12 5: : i 29 203 5 28 22 29? : /
NZ779048A 2018-06-06 Method and apparatuses for screening NZ779048B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201762515964P 2017-06-06 2017-06-06
US201862615302P 2018-01-09 2018-01-09
NZ759848A NZ759905B2 (en) 2017-06-06 2018-06-06 Method and apparatuses for screening

Publications (2)

Publication Number Publication Date
NZ779048A NZ779048A (en) 2024-07-05
NZ779048B2 true NZ779048B2 (en) 2024-10-08

Family

ID=

Similar Documents

Publication Publication Date Title
CN210933998U (en) Screen basket device, screening box subassembly, screen cloth component and screening equipment
CA2713990C (en) Filter element for a disc filter
CN109013297B (en) Injection molded screen apparatus and method
US11052427B2 (en) Apparatuses, methods, and systems for vibratory screening
US11213857B2 (en) Method and apparatus for screening
US20080245707A1 (en) Pre-tensioned sifter screen
JP5901642B2 (en) Plastic melt filtration equipment
US11806755B2 (en) Apparatuses, methods, and systems for vibratory screening
CN110769912B (en) Filter disc, filter cartridge for use in a filter disc and method of reducing disturbances in a filter disc
US6358292B1 (en) Pleated filter element with reusable mounting plate
CA2972663C (en) Screen assembly for a vibrating screening machine
NZ779048B2 (en) Method and apparatuses for screening
WO2019006533A1 (en) Screen assembly for a vibrating screening machine
CN113165020B (en) Methods and devices for screening
US5906735A (en) Beverage-screening filter leaf having woven screen supported against deflection
EA045182B1 (en) METHOD AND DEVICES FOR SCREENING
OA20184A (en) Method and apparatuses for screening.
BR112021006440B1 (en) METHOD AND APPARATUS FOR SIEVING
DE202006017104U1 (en) filter bag
DE9320399U1 (en) Filter device
EA048023B1 (en) METHOD AND DEVICE FOR SCREENING
DE20301672U1 (en) Portable garment cleaning appliance, has a frame with an integrated replaceable filter unit, where the garment bag interior is linked to the inflow side of the filter