CA2055415A1 - Process of sorting plastic particles - Google Patents
Process of sorting plastic particlesInfo
- Publication number
- CA2055415A1 CA2055415A1 CA 2055415 CA2055415A CA2055415A1 CA 2055415 A1 CA2055415 A1 CA 2055415A1 CA 2055415 CA2055415 CA 2055415 CA 2055415 A CA2055415 A CA 2055415A CA 2055415 A1 CA2055415 A1 CA 2055415A1
- Authority
- CA
- Canada
- Prior art keywords
- process according
- wet
- particles
- fraction
- wet shaking
- 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.)
- Abandoned
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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
- B03B5/04—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on shaking tables
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
- B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0203—Separating plastics from plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0217—Mechanical separating techniques; devices therefor
- B29B2017/0227—Vibratory or shaking tables
-
- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- 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
- B29K2055/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2023/00 - B29K2049/00, e.g. having a vinyl group, as moulding material
- B29K2055/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
-
- 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
- B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
-
- 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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
-
- 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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/02—Aluminium
-
- 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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/08—Transition metals
-
- 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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/08—Transition metals
- B29K2705/10—Copper
-
- 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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/08—Transition metals
- B29K2705/12—Iron
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
ABSTRACT
In a process of sorting by density a polydis-perse bulk material consisting of particles consisting of different kinds of plastic the plastic particles are supplied to a wet shaking screen to form a thin layer thereon.
In a process of sorting by density a polydis-perse bulk material consisting of particles consisting of different kinds of plastic the plastic particles are supplied to a wet shaking screen to form a thin layer thereon.
Description
This invention relates to a process of sorting by density a polydisperse culk material, which comprises particles consisting of dif~erent kinds of pla~tics and optionally contains al~o me~al particles.
The returning of used plastics into the economic circulation and in~o the circulation of materials is progres~ively gaining in importance with the object to save the consumption of petroleum as a raw material in the primary production, also to ~ave the ¢onsumption of energy required to convert the pstroleum to pla~tic~, and to decrease the proportion of plasti¢s in the total amount of waste material.
Petroleum and a ~ufficiently large dump volume are available only to a limited extent. Because there are numerou~ kind~ of plastics which have different mechanical-technological and chemical properties and for that reason are used in different fields, it would not make much sense to collect mixed plastic materials and to ~u~ject them to further processing as mixtures almost without a preliminary treatment. This is 80 - 20~41~
because the products made therefrom would have only a relatively low value and could not repeatedly be re-used.
That fact has given rise to the re~uirement to collect each kind of plastics separately for its return to the circulation of materials and for its reprocessing. It is also important to sort mixed plastics. But the large number of kinds of plastics and types thereof presently in use renders a collecting of separate plastics over complete areas difficult and would depend on the establishment of separate collecting facilities and a picking-up organization, These requirements can undesirably be met only at a sub~tantial expenditure.
Various kinds of plastics are often used at present in composites together with other kinds of plastics or other materials. The bulk materials formed by the disintegration of dumped products of such composite materials can be separated only by a mechanical sorting and this gives rise to problems because the densities of the various kinds of plastics differ only slightly.
It is ~n object of the present invention to provide a process which permits a controlled enriching of particles of different kinds of plasticY contained in a bulk material, which may optionally contain also metal particles, in density fractions and permits a high purity and a high yield to be achieved thereby.
The returning of used plastics into the economic circulation and in~o the circulation of materials is progres~ively gaining in importance with the object to save the consumption of petroleum as a raw material in the primary production, also to ~ave the ¢onsumption of energy required to convert the pstroleum to pla~tic~, and to decrease the proportion of plasti¢s in the total amount of waste material.
Petroleum and a ~ufficiently large dump volume are available only to a limited extent. Because there are numerou~ kind~ of plastics which have different mechanical-technological and chemical properties and for that reason are used in different fields, it would not make much sense to collect mixed plastic materials and to ~u~ject them to further processing as mixtures almost without a preliminary treatment. This is 80 - 20~41~
because the products made therefrom would have only a relatively low value and could not repeatedly be re-used.
That fact has given rise to the re~uirement to collect each kind of plastics separately for its return to the circulation of materials and for its reprocessing. It is also important to sort mixed plastics. But the large number of kinds of plastics and types thereof presently in use renders a collecting of separate plastics over complete areas difficult and would depend on the establishment of separate collecting facilities and a picking-up organization, These requirements can undesirably be met only at a sub~tantial expenditure.
Various kinds of plastics are often used at present in composites together with other kinds of plastics or other materials. The bulk materials formed by the disintegration of dumped products of such composite materials can be separated only by a mechanical sorting and this gives rise to problems because the densities of the various kinds of plastics differ only slightly.
It is ~n object of the present invention to provide a process which permits a controlled enriching of particles of different kinds of plasticY contained in a bulk material, which may optionally contain also metal particles, in density fractions and permits a high purity and a high yield to be achieved thereby.
2 0 ~ 5 That ob~ect is accomplished by the use of a wet shaking table. The plastic particles as well as water an~
optionally also metal particles are supplied to the surface of the table to form a thin layer thereon and are distributed over the surface of the table. As the surface of the table performs a shaking motion, each stroke of said motion will throw the plastic and metal particles forward in the direction of the movement of the wet shaking table to an extent which depends on the specific gravity of each particle. Water is caused to flow on the surface of the table transversely to the direction of movement of the surface. That water has been supplied at the upper longitudinal side of the surface of the table to form a thin layer thereon.
The motion of the table and the movement of the water cause the plastic particles and any metal particles to be collected in-dependence on their speci~ic gravities in certain discharge regions. The particles having the highest ~pecific gravity will be advanced the largest distance and the lightest particles will be discharged close to the feeding point.
~ ccording to a preferred feature of the process in accordance with the invention the plastic particles and any metal particles have particle sizes from ~ 0 mm to 10 mm, preferably > O mm to 6 mm, with a mode between 2 and 4 mm.
20~5~1~
The surface of the wet shaking table has a transverse inclination below 5, preferably of 0.5 to 2, and is o~erated with a slroke amplitude of 50 to 300 mm and an oscillation period of 100 to 200 ms.
In the region for dischar~ing the lightest plastic particles the surface of the table is supplied with water a~ a rate of 250~ to 3500 liters/h. In the region for discharging the heaviest particles, preferably the metal particles, the surface of the table is supplied with water at a rate of 150 ~o 450 liters/h and in the region for discharging the plastic particles having an intermediate density the rate of water supply is 1250 to 1750 liters/h.
The particles of intermediate density, which are discharged in the intermediate region, are suitably fed once more to the shaking table in order to increase the yield.
The wet shaking table may be preceded by a float-sink separator or a hydrocyclone.
An illustrative embodiment of the invention will be de~cribed in more detail hereinafter.
A polydisperse bulk materi~1 of plastic particles and metal particles has been produced by a disintegration of telephone sets and consist~ of particles having sizes from ~ O to 6 mm with a mode between 2 and 4 mm. In accordance with Figure 1 that 20~41~
bulk material consists of 83.62% plastic particles (ABS) having a density below 1.2 g/cm3, 2.01~ plastic particles (PC) having a density of 1.2 to 1.3 g/cm3, 10.50/~o plastic particles (PVC, filled thermoset resins) having a den~ity of 1.3 to 1.5 g/cm3, 2.15~ plastic particles (fragments of printed circuit boards) having a density of 1.5 to 2.5 g/cm3, 2.07~ metal particles (copper, aluminum, iron) having a density above 2.0 g/cm3.
~ hat mixture i9 applied at A to the surface 1, Phown in Figure 2, of a wet sha~ing table 2 to form a thin layer thereon. The surface 1 of the shaking table is moved in a direction BR, which includes an angle of 15 with the longitudinal axis of the surface 1. The surface 1 of the table is not longitudinally inclined and is provided with longitudinal grooves 3 and is moved by drive means 4. The surface 1 of the table is moved with a stroke ~mplitude of 225 mm and with an oscillation period of 165 ms. At the top edge of the surface 1 of the table, water is supplied through a spray pipe 5 at a rate of > 3000 liters/h in the section A (for discharging the light fraction), at a rate of 300 liters/h in the section C (for discharging the heavy fraction), and at a rate of 1500 liters/h in the intermediate section B.
20554~
l'he throughput rate amounts to 400 kg/h.
Figure 3 indicates the result of the sorting of the main groups of substances in four discharge regions.
Two fractions are collected to provide two usable products, namely, ground ~BS material and a heavy product consisting of non-ferrous metals. ~he lighter intermediate fraction which contains ~BS is only slightly enriched and is again recycled to the feeder.
The heavier intermediate fraction consisting of PVC and printed circuit board material is definitely dumped.
From the results of the sorting tests it is clearly apparent that a wet shaking table can be u~ed with high success for a co~trolled enriching of plastics in a fraction having a density in a specified range and that any metal particle~ which are still present can considerably be enriched in the same operation. The overall yield is further improved in that the intermedi-ate fraction which has only slightly been enriched is recycled.
., .
2 0 ~
Translation of the Inscri~tions on the Drawin~s i~ure 1 (Ma.-~o) (% by weight) Gehalt Content Dichtestufe (g/cm3) Density fraction (g/cm3) ~ure 3 (~a.~) (-/0 by weight) ABS ABS
~VC/~eiterplatten PVC/printed circuit boards ABS-~ahlgut Ground ABS material Zwischengut ~ighter intermediate fraction Mittelgut Heavier intermediate fraction Schwergut Heavy Fraction Fraktionen Fractions Gehalt Content Ausbringen Yield Fraktionen Fractions
optionally also metal particles are supplied to the surface of the table to form a thin layer thereon and are distributed over the surface of the table. As the surface of the table performs a shaking motion, each stroke of said motion will throw the plastic and metal particles forward in the direction of the movement of the wet shaking table to an extent which depends on the specific gravity of each particle. Water is caused to flow on the surface of the table transversely to the direction of movement of the surface. That water has been supplied at the upper longitudinal side of the surface of the table to form a thin layer thereon.
The motion of the table and the movement of the water cause the plastic particles and any metal particles to be collected in-dependence on their speci~ic gravities in certain discharge regions. The particles having the highest ~pecific gravity will be advanced the largest distance and the lightest particles will be discharged close to the feeding point.
~ ccording to a preferred feature of the process in accordance with the invention the plastic particles and any metal particles have particle sizes from ~ 0 mm to 10 mm, preferably > O mm to 6 mm, with a mode between 2 and 4 mm.
20~5~1~
The surface of the wet shaking table has a transverse inclination below 5, preferably of 0.5 to 2, and is o~erated with a slroke amplitude of 50 to 300 mm and an oscillation period of 100 to 200 ms.
In the region for dischar~ing the lightest plastic particles the surface of the table is supplied with water a~ a rate of 250~ to 3500 liters/h. In the region for discharging the heaviest particles, preferably the metal particles, the surface of the table is supplied with water at a rate of 150 ~o 450 liters/h and in the region for discharging the plastic particles having an intermediate density the rate of water supply is 1250 to 1750 liters/h.
The particles of intermediate density, which are discharged in the intermediate region, are suitably fed once more to the shaking table in order to increase the yield.
The wet shaking table may be preceded by a float-sink separator or a hydrocyclone.
An illustrative embodiment of the invention will be de~cribed in more detail hereinafter.
A polydisperse bulk materi~1 of plastic particles and metal particles has been produced by a disintegration of telephone sets and consist~ of particles having sizes from ~ O to 6 mm with a mode between 2 and 4 mm. In accordance with Figure 1 that 20~41~
bulk material consists of 83.62% plastic particles (ABS) having a density below 1.2 g/cm3, 2.01~ plastic particles (PC) having a density of 1.2 to 1.3 g/cm3, 10.50/~o plastic particles (PVC, filled thermoset resins) having a den~ity of 1.3 to 1.5 g/cm3, 2.15~ plastic particles (fragments of printed circuit boards) having a density of 1.5 to 2.5 g/cm3, 2.07~ metal particles (copper, aluminum, iron) having a density above 2.0 g/cm3.
~ hat mixture i9 applied at A to the surface 1, Phown in Figure 2, of a wet sha~ing table 2 to form a thin layer thereon. The surface 1 of the shaking table is moved in a direction BR, which includes an angle of 15 with the longitudinal axis of the surface 1. The surface 1 of the table is not longitudinally inclined and is provided with longitudinal grooves 3 and is moved by drive means 4. The surface 1 of the table is moved with a stroke ~mplitude of 225 mm and with an oscillation period of 165 ms. At the top edge of the surface 1 of the table, water is supplied through a spray pipe 5 at a rate of > 3000 liters/h in the section A (for discharging the light fraction), at a rate of 300 liters/h in the section C (for discharging the heavy fraction), and at a rate of 1500 liters/h in the intermediate section B.
20554~
l'he throughput rate amounts to 400 kg/h.
Figure 3 indicates the result of the sorting of the main groups of substances in four discharge regions.
Two fractions are collected to provide two usable products, namely, ground ~BS material and a heavy product consisting of non-ferrous metals. ~he lighter intermediate fraction which contains ~BS is only slightly enriched and is again recycled to the feeder.
The heavier intermediate fraction consisting of PVC and printed circuit board material is definitely dumped.
From the results of the sorting tests it is clearly apparent that a wet shaking table can be u~ed with high success for a co~trolled enriching of plastics in a fraction having a density in a specified range and that any metal particle~ which are still present can considerably be enriched in the same operation. The overall yield is further improved in that the intermedi-ate fraction which has only slightly been enriched is recycled.
., .
2 0 ~
Translation of the Inscri~tions on the Drawin~s i~ure 1 (Ma.-~o) (% by weight) Gehalt Content Dichtestufe (g/cm3) Density fraction (g/cm3) ~ure 3 (~a.~) (-/0 by weight) ABS ABS
~VC/~eiterplatten PVC/printed circuit boards ABS-~ahlgut Ground ABS material Zwischengut ~ighter intermediate fraction Mittelgut Heavier intermediate fraction Schwergut Heavy Fraction Fraktionen Fractions Gehalt Content Ausbringen Yield Fraktionen Fractions
Claims (18)
1. A process of sorting by density a polydisperse bulk material, which comprises particles consisting of different kinds of plastics, characterized in that the plastic particles are supplied to a wet shaking table to form a thin layer thereon.
2. A process according to claim 1, characterized in that the plastic particles have particle sizes from 0 mm to 10 mm, with a mode between 2 and 4 mm.
3. A process according to claim 1 or 2, characterized in that the wet shaking table has a transverse inclination below 5°.
4. A process according to claim 1 or 2, characterized in that water is applied transversely to the direction of movement of the wet shaking table at a rate of 2500 to 3500 liters/h in the region for discharging the lightest fraction, at a rate of 150 to 450 liters/h in the region for discharging the heaviest fraction, and at a rate of 1250 to 1750 liters/h in the region for discharging the intermediate fraction.
5. A process according to claim 1 or 2, characterized in that the wet shaking screen is operated with a stroke amplitude of 50 to 300 mm.
6. A process according to claim 1 or 2, characterized in that the wet shaking screen is operated with an oscillation period of 100 to 200 ms.
7. A process according to claim 1 or 2, characterized in that the fraction discharged in the intermediate region is again supplied to the wet shaking screen.
8. A process according to claim 1 or 2, characterized in that the wet shaking screen is preceded by a float-sink separator or a hydrocyclone.
9. A process of sorting by density a polydisperse bulk material, which comprises particles consisting of different kinds of plastics and contains also metal particles, characterized in that the plastic particles and also metal the particles are supplied to a wet shaking table to form a thin layer thereon.
10. A process according to claim 9, characterized in that the plastic particles and the metal particles have particle sizes from > 0 mm to 10 mm, with a mode between 2 and 4 mm.
11. A process according to claim 9 or 10, characterized in that the wet shaking table has a transverse inclination below 5°.
12. A process according to claim 9 or 10, characterized in that water is applied transversely to the direction of movement of the wet shaking table at a rate of 2500 to 3500 liters/h in the region for discharging the lightest fraction, at a rate of 150 to 450 liters/h in the region for discharging the heaviest fraction, and at a rate of 1250 to 1750 liters/h in the region for discharging the intermediate fraction.
13. A process according to claim 9 or 10, characterized in that the wet shaking screen is operated with a stroke amplitude of 50 to 300 mm.
14. A process according to claim 9 or 10, characterized in that the wet shaking screen is operated with an oscillation period of 100 to 200 ms.
15. A process according to claim 9 or 10, characterized in that the fraction discharged in the intermediate region is again supplied to the wet shaking screen.
16. A process according to claim 9 or 10, characterized in that the wet shaking screen is preceded by a float-sink separator or a hydrocyclone.
17. A process according to clim 1, 2 or 9, characterized in that the plastic particles and any metal particles have particle sizes from > 0 mm to 6 mm, with a mode between 2 and 4 mm.
18. A process according to claim 1, 2 or 9, characterized in that the wet shaking table has a transverse inclination of 0.5 to 2°.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4037024.0 | 1990-11-21 | ||
| DE19904037024 DE4037024A1 (en) | 1990-11-21 | 1990-11-21 | METHOD FOR SORTING PLASTIC PARTICLES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2055415A1 true CA2055415A1 (en) | 1992-05-22 |
Family
ID=6418644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2055415 Abandoned CA2055415A1 (en) | 1990-11-21 | 1991-11-13 | Process of sorting plastic particles |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0487123A1 (en) |
| JP (1) | JPH0663441A (en) |
| CA (1) | CA2055415A1 (en) |
| DE (1) | DE4037024A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4302283A1 (en) * | 1993-01-25 | 1994-07-28 | Inst Umwelttechnologien Gmbh | Sepg. and sorting plastic scrap and process equipment |
| DE4314759A1 (en) * | 1993-05-05 | 1994-11-10 | Kloeckner Humboldt Deutz Ag | Process and plant for the mechanical treatment of waste mixtures |
| EP1379333B1 (en) * | 2001-04-20 | 2007-06-06 | Rastof og Genanvendelse Selskabet af 1990 A/S | A method and an apparatus for separating waste material |
| CN109351460A (en) * | 2018-11-06 | 2019-02-19 | 石城县恒兴选矿设备制造有限公司 | A kind of uninterrupted shaking table for preparation equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2139350A1 (en) * | 1971-08-06 | 1973-02-15 | Gaidies H D Dipl Ing | Recovery of copper - or other metal from cable waste |
| CA946786A (en) * | 1972-04-24 | 1974-05-07 | Ritson H. Graves | Method for treatment of wire scrap |
| NL177898C (en) * | 1974-12-12 | 1985-12-16 | Stamicarbon | METHOD FOR RECOVERING USEFUL MATERIALS FROM WASTE MATERIAL CONTAINING METALS AND NON-METALS |
| DE3301978A1 (en) * | 1983-01-21 | 1984-07-26 | Carl Schenck Ag, 6100 Darmstadt | Method for separating a mixture of bulk material and device for carrying out the method |
| AT386552B (en) * | 1986-05-28 | 1988-09-12 | Andritz Ag Maschf | METHOD AND SYSTEM FOR SEPARATING LIGHTNING MATERIALS FROM SUBSTRATE MIXTURES |
| IT1237205B (en) * | 1989-12-06 | 1993-05-27 | Consiglio Nazionale Ricerche | PROCESS FOR THE SEPARATION AND RECOVERY OF LEAD, RUBBER AND COPPER WIRES FROM WASTE CABLES |
-
1990
- 1990-11-21 DE DE19904037024 patent/DE4037024A1/en not_active Withdrawn
-
1991
- 1991-11-05 EP EP19910202853 patent/EP0487123A1/en not_active Withdrawn
- 1991-11-13 CA CA 2055415 patent/CA2055415A1/en not_active Abandoned
- 1991-11-19 JP JP33012691A patent/JPH0663441A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0487123A1 (en) | 1992-05-27 |
| DE4037024A1 (en) | 1992-05-27 |
| JPH0663441A (en) | 1994-03-08 |
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