GB2053737A - A process and a device for sink- float separation - Google Patents
A process and a device for sink- float separation Download PDFInfo
- Publication number
- GB2053737A GB2053737A GB7938354A GB7938354A GB2053737A GB 2053737 A GB2053737 A GB 2053737A GB 7938354 A GB7938354 A GB 7938354A GB 7938354 A GB7938354 A GB 7938354A GB 2053737 A GB2053737 A GB 2053737A
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- United Kingdom
- Prior art keywords
- drum
- matter
- sedimentary
- sink
- float
- Prior art date
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Links
- 238000000034 method Methods 0.000 title claims description 13
- 230000008569 process Effects 0.000 title claims description 13
- 238000000926 separation method Methods 0.000 title abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000007667 floating Methods 0.000 claims description 47
- 238000005406 washing Methods 0.000 claims description 19
- 238000005204 segregation Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 239000008237 rinsing water Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 241000237970 Conus <genus> Species 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- 238000006124 Pilkington process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229920001875 Ebonite Polymers 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241001295925 Gegenes Species 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002611 lead compounds Chemical class 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
-
- 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
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/36—Devices therefor, other than using centrifugal force
- B03B5/42—Devices therefor, other than using centrifugal force of drum or lifting wheel type
-
- 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
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
- B03B5/56—Drum classifiers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- 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
- Y02W30/84—Recycling of batteries or fuel cells
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Paper (AREA)
- Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
Abstract
In a sink-float separation process, e.g. for storage battery scrap, the material to be segregated is fed into a rotary drum containing high-density separation medium and both the sinks and floats are discharged from the drum purely mechanically. Coaxially to the drum (2) containing the medium (5), is a conical drum (4) for the sinks and coaxially within the latter a conical drum (3) for the floats. All the drums are rotationally fixed to tone another. The ends of the drums (3) and (4) which penetrate at varying depths into the sink-float drum (2) are closed with the exception of one each inlet opening (10, 15). The end of the drum (3) is provided with a perforated scoop (13) projecting approximately radially along its outer circumference. A rake (8) is fixed to the inner surface of the drum (2) at its deeper end. As the drums rotate the scoop (13) and the rake (8) lift the floats end sinks, respectively from the surface and out of the high-density medium 5 and deliver them via the openings (10,15) respectively into the drum (3) and (4). <IMAGE>
Description
SPECIFICATION
A process and a device for sink-float treatment, particularly of storage battery scrap.
The invention relates to a process and a device for the sink-float treatment, (sink-float process, densemedium process, heavy-media separation), particularly of storage battery scrap, under use of a high-density medium.
Sink float treatment as a segregation process and various separator constructions are known, particularly from Ullmann's encyklopädie der Technischen
Chemie, Volume 2, Verfahrenstechnik I, 4th Edition 1972, Verlag Chemie, Weinheim, Bergstrasse, pages 104 to 109 and Winnacker-Kuchler, Chemische
Technologie, Volume 6, Metallurgie Verlag Carl
Hanser, Munich 1973, pages 37 to 45 and 77 to 79.
Particularly in the course of developing a fully mechanised process for the dressing of storage battery scrap, it became evident that this would involve segregating a mixture consisting of coarsely divided metallic lead and casing material (hard rubber, polypropylene, polystyrene and the like) into its components.
It was known that this segregation could be achieved by a sink-float process under use of a high-density medium consisting of water and lead sludge. In the sink-float process mentioned above, an excess of lead sludge suitable for this purpose becomes available in the form of waste filler.
However, the known devices for sink-float segregation are elaborate. All of them are conceived for enormous material throughputs, while the amounts of raw material accumulating in the course of storage battery scrap segregation are very low in comparison.
In the storage battery scrap preparation process of the Stolberger Zink Company in Stolberg
Binsfeldhammer (c.f. the paper by A. Melin "Gegen wartiger Stand der Verhuttung von Akkuschrott" in "Metall", 31st year, Issue No. 2, February 1977), a lifting wheel separator (Humbold lifting wheel separator) as described in the publications previously mentioned is used.
In this separator, the floating material is entrained out of the drum by the stream of high-density medium. In the other, previously mentioned known heavy-media separators, the high-density medium is not always the conveying medium proper for discharging the floating material, but is always discharged together with the material and thus has to be circulated (so-called thick-media circulation).
In addition to this exists the socalled thin-media circulation in which the washings contaminated by the heavy matter accumulating in rinsing the segregation products are dressed and returned to the process.
It is the object of the invention to simplify the known processes and devices. This is achieved according to the invention in a sink-float process (high-density media segregation), particularly of storage battery scrap, in which the material to be dressed is conveyed to a rotating drum containing the high-density medium and the sedimentary matter is discharged from the drum in a purely mechanical way, by also discharging the floating matter purely mechanically, so that the high-density medium remains essentially stationary.
This means that in the process according to the invention, the sedimentary matter as well as the floating matter is discharged from the sink-float vessel purely mechanically. With the exception of the negligible amount of high-density medium which adheres to the segregation products in the form of moisture at discharge from the vessel and is rinsed off in the rinsing line downstream, the high-density medium remains stationary.
This makes thick-media circulation completely redundant. What remains is the thin-media circulation in which the washings are dressed and returned to the first step of the washing process. The heavy sludge thus recovered is re-introduced into the sink-float vessel to compensate for the losses previously mentioned.
A further object of the invention is the provision of a device for carrying out the process according to the invention having a rotating, preferably conusshaped drum containing the high-density medium and provided on a front face with an inlet opening for the material to be segregated and on its inner circumference with a lifting rake for discharging the sedimentary matter.This device is characterised according to the invention in that coaxially to the drum containing the high-density medium (sink-float drum) and within the same, there is provided a preferably conical drum for the sedimentary matter and coaxially within the latter a preferably conical drum for the floating matter, all drums being rotationally fixed to one another, that the ends of the drum for the sedimentary matter and the drum for the floating matter, which are arranged within the sink-float drum and are closed with the exception of one each inlet opening for the sedimentary matter and the floating matter, respectively, axially penetrate at varying depths into the sink-float drum, the end of the drum for the floating matter being provided with a perforated scoop approximately radially projecting along its outer circumference and the axial penetration of the drum for the floating matter into the sinkfloat drum exceeding that of the drum for the sedimentary matter by at least the axial extension of the scoop. In a further embodiment of the invention, it is particularly advantageous to provide both the drum for the floating matter and the drum for the sedimentary matter on their extended ends, which are positioned outside of the sink-float drum, with screen segments, and to provide rinsing water nozzles within these drum ends for washing the sedimentary matter as well as the floating matter.In this way, the drums, both for floating and for sedimentary matter, also serve as washing drums in which the two separated products may be sprayed off and washed immediately adjacent the sink-float drum. The washing drums are rigidly attached to the sink-float drum and are driven together with it by a common rotating shaft. This makes separate washing drums or washing screens for cleaning the thick-media residue off the separated products unnecessary.
The device according to the invention, which carries out the separating operation as well as the washing operation, might be called a "sink-float washer".
A further embodiment of the device according to the invention provides for the inlet opening corresponding with the lifting rake for discharging the sedimentary matter and provided in the closed end of the drum for the sedimentary matter to have the form of an open well formed by a metal sheet arranged in a position of the drum parallel to the surface of the high-density medium within the sink-float drum and a dam (barrier) sheet inserted vertically in respect of the first sheet, so that the heavy medium, at rotation of the drums, enters the well from which it is discharged again at further rotation, but cannot enter the drum for the sedimentary matter.It is further practical to position the scoop on the outside of the drum forthefloating matter pivotably within a limited range around an axis parallel to the direction of the central shaft of the drums, with the inlet opening at the end of the drum for the floating matter arranged within the range of the shell of this drum - viewed in the rotating direction of the drums - in front of the pivot of the scoop. Stops fór limiting the pivoting motion of the scoop can be provided on the drum for the floating matter.
The invention is described in detail by means of an embodiment of the device according to the invention under reference to the accompanying drawings.
Figure 1 shows a schematised, axial, longitudinal section of the device according to the invention,
Figure 2A and 2B each show a cross section along line ll-ll in Figure 1, with the drums in Figure 2B advanced in rotation by 105 as compared to the position represented in Figure 2A,and
Figure 3A to 3C each show a cross section along line Ill-Ill in Figure 1 in various rotating positions.
Around a rotating central shaft 1 (rotating direction R), three conical drums 2, and 4 are supported by means of appropriate struts and rigidly connected among one another and to the shaft 1.
Shaft 1 is preferably horizontally positioned, but may also be inclined in respect of the horizontal.
the first drum 2, the so-called sink-float drum, contains the high-density medium 5.
The separation operation proper takes place in the sink-float drum 2.
The front wall positioned on the narrower side of the conus of the sink-float drum 2 is provided with a central opening forthefeed channel 6 (charge B) and the pipe 7 for supplying the high-density medium
ST.
Through the opposite front wall, the two conusses of the drum 3 for the floating matter and the drum 4 for the sedimentary matter penetrate with their tapered ends and at different penetration depths into the interior of the sink-float drum 2.
At the deepest spot of the sinkfloat drum 2, a rake 8 is fixed to the drum periphery. It is the purpose of this rake to carry upwards the sedimentary matter which has slid to the bottom along the inclined wall of the drum.
The conus of the drum 4 for the sedimentary matter protrudes into the inside of the sink-float drum 2 by approximately the width of the rake 8, while the conus of the drum 3 for the floating matter protrudes into the sink-float drum 2 preferably up to half or two thirds of the length of drum 2.
On its inner front face, the sedimentary matter conus 4 is closed off watertight against floating matter conus 3 by means of an annular metal sheet 9. This water seal 9 is arranged vertically in respect of the central shaft 1 in the embodiment shown. But it may also be arranged inclined in respect of shaft 1 so as to promote conveying of the sedimentary matter to the discharge end of conus 4. In the present embodiment, this effect is achieved by a steeper inclination of conus 4 in this zone.
In this comparatively short part protruding into the inside of the sink-float drum 2, the shell of the sedimentary matter conus 4 is provided with an opening in a spot functionally associated with the aforementioned rake 8. This opening is is so selected that the sedimentary matter lifted up by rake 8 along the wall of the drum will drop through the opening into the interior of the sedimentary matter conus 4 when it slides off the rake 8 in the apex (position of the drums according to Figure 3C).
It is evident from the drawing that this opening is positioned below the surface of the high-density medium 5.
Without an additional structural measure which is described in the following, high-density medium would flowthrough conus 4 to the outside at each passage of this opening through the high-density medium 5. Without an essentially larger drum diameter and an essentially longer scoop 13 for the floating matter, it would then not be possible to keep the level of the high-density medium at a height required for an effective separation process.
If the aforementioned opening is penetrated by an open well 10 formed by the conical drum 4forthe sedimentary matter together with the funnel-shaped extension mentioned below and the front wall or the closing sheet 9 of the conus 4, on the one hand, and the metal sheet 11 parallel to the surface of the high-density medium in the position according to
Figure 3A and the dam sheet 12 vertical in respect of this, on the other hand, the high-density medium does enter this well space at passing the position according to Figure 3a, but completely exits the well space at further rotation of the drum into the position according to Figure 3B and allows a free dropping of the sedimentary matter into the interior of sedimentary matter conus 4 in the position according to Figure 3C.
The sedimentary matter well 10 is extended beyond the opening and enlarged in funnel-shape towards the rake 8 so as to safely guide the sedimentary matter sliding off the rake 8 into this opening. It should be emphasised that conveying of the sedimentary matter through well 10 occurs in the phase according to Figure 3C only and that in this phase, the sedimentary matter drops from rake 8 through the well 10 completely open towards the bottom into the interior of conus 4 and from there is conveyed to the outside. Thus, a passage in the dam sheet 12 for the sedimentary matter is not necessary, as in the position according to Figure 3C, the dam sheet 12 is positioned vertically on the left-hand side and does not impede the transition of the sedimentary matter from well 10 into conus 4.Arrow SKG' in
Figure 1 merely serves to indicate the material flow of the sedimentary matter when the conical drums 2, 3, 4 are in the position according to Figure 3C. No sedimentary matter can drop into well 10 in the position shown in Figure 1, as the rake 8 is then almost in its lowermost position.
Dam sheet 12 and sheet 11 1 thus serve the exclusive purpose to prevent leakage of high-density medium into the sedimentary matter conus 4 during the passage of the funnel-shaped, enlarged part of well 10 through the high-density medium 5 - a simple opening with funnel would suffice to pass the sedimentary matter from rake 8 into the space between the sedimentary matter conus 4 and floating matter conus 3. To prevent such leakage, the dam sheet 12 forms a dam perpendicular to shaft 1 during the passage of the funnel-shaped enlarged part of the well through the positions slightly in front of Figure 3A to slightly behind Figure 38; sheet 11, which extends from a generatrix of the sedimentary matter drum 4 tangentially to the floating matter drum 3 and ends there, prevents leakage of the high-density medium in radial or peripheral direction.
As already mentioned, the sheet 11 only extends as far as the contact line with the floating matter drum 3 and ends there; from this line on, well 10 in the direction of the sedimentary matter is formed by the two concentric conical surfaces of the sedimentary matter drum 4 and the floating matter drum 3, while the lateral limits are constituted by the dam sheet 12 and the front face sealing sheet 9 of the sedimentary matter drum 4.
In Figure 2A, the staggering of the upper edge of the dam sheet 12 is intended to indicate that this sheet 12 could extend even higher within the zone where there is no sheet 11 in order to achieve an even better damming effect.
For discharging the floating fraction, a perforated scoop 13 is fixed to that part of the floating matter conus 3 which protrudes through the sedimentary matter conus 4 into the interior of the sink-float drum 2. The scoop 13 consists of perforated sheet metal or screen fabric and is fixed to the shell of the floating matter conus 3 by means of a pivot joint 14.
In rotating direction R of the drums 2, 3, 4 viewed from in front of the scoop 13, the shell of the floating matter conus 3 is provided with an opening 15 through which the floating matter lifted off the surface of the medium by scoop 13 can drop into the interior of floating matter conus 3 at further rotation of the drum. In the interior of conus 3, a helical surface 16 is provided in order to increase movement of the floating matter in the direction of the discharge.
The scoop 13 is articulated to conus 3 so that it can move between stops 17a and 17b at each rotation of the drum. After passing the apex of the drum, the scoop drops frontwards onto stop 17b (position according to Figure 2B). By this impact, the screens of the scoop, which would otherwise become clogged by sludge and fibrous foreign matter, are automatically cleaned.
The device as shown at the same time contains washing means for the sedimentary matter and the floating matter. When the conical drums 3, 4 are appropriately extended and provided with screen segments 18 for the separated fraction, an effective washing operation can simultaneously be combined with the discharge of the material. The water required for washing is introduced by means of pipes (Arrow W in Figure 1) and spray jets (nozzles) 19. The rotating motion of drums 3, 4 brings about an intensive scrubbing effect.
The water contaminated by heavy matter is collected in a tub and subjected to washing water dressing. In a simple process, the heavy matter can be recovered for recycling and the washing water can be purified to the extent that it can be discharged into a draining ditch or reused for the washing operation itself.
The floating or sedimentary matter thus purified leaves the drums 3 and 4 at the discharge ends along arrows SWG and SKG in Figure 1.
The device according to the invention functions as follows:
The sink-float drum 2 is filled up almost to the lower edge of the front opening with high-density medium of suitable density and rotates in the indicated direction R.
Via feed channel 6, the mixtures to be separated or charges are introduced into the sink-float drum 2.
Charging is effected according to Arrow B in Figure 1.
The heavy components of the charge (sedimentary matter) sink to the bottom and move along the inclined wall of the drum to the lowest point of the drum 2. There, the sedimentary matter is seized by rake 8 and moved upwards along the wall of the drum.
Close to the apex of this movement, the sedimentary matter slides off rake 8, which is preferably formed of a series of individual rods, and drops through the well 10, which at this point is positioned precisely underneath, into the interior of the sedimentary matter drum 4.
Supported by the helically arranged guide sheets (not shown) in the interior of the sedimentary matter drum 4, the material is conveyed towards the discharge and at the same time intensively scrubbed by spraying with water (spray nozzles 19). The washings flow through the screen segments 18 in a tub (not shown) positioned underneath. The scrubbed sedimentary matter drops onto a conveyor belt (not shown) and is removed.
The light-weight components of the charge (floating matter) remain near the surface of the highdensity medium 5, are seized by the scoop 13 at each passage and lifted upwards. The adhering highdensity medium flows through the screen-shaped bottom of the scoop 13 back into the high-density medium 5.
At continued rotation of the drum, the inclination of the bottom of the scoop 13 changes and the floating matter slides off and drops through the opening 15 into the interior of the floating matter drum 3.
Further conveying.of the material to the discharge end, its scrubbing by means of water and the discharge of the material itself are the same as in the case of sedimentary matter.
The washings contaminated by heavy matter are collected and fed into a concentrator. The heavy sludge periodically withdrawn from the concentrator is used for the preparation of fresh high-density medium which is reintroduced via the high-density medium pipe 7 of the sink-float drum 2 in order to maintain the level of the high-density medium.
The substantial advantages of the invention may be summarised as follows:
Particular advantages of the invention over the known devices at identical separating effect are the simple and compact construction (low space requirement) and the low operating and investment cost.
By using a rotating drum 2, the heavy matter is constantly moved and kept in suspension. No circulation of high-density medium is required.
Sinkfloat separation of sedimentary matter and floating matter and the washing of the separated products are carried out in one and the same device with a single drive.
The device according to the invention will be used with particular advantage where comparatively low throughput capacity as compared with conventional ore and coal dressing installations is required.
A typical field of operation is the dressing of storage battery scrap, in particular the separation of casing fragments and metallic lead.
Application Example:
Charge: Coarse fraction after crushing, drying and screening of the lead storage batteries, consisting of a mixture of about 45 percent casing material (fragments of battery casings of hard rubber, polypropylene and similar plastics materials; particle size 4 to 100 mm), and about 55 percent lead metal (pole ends, connectors, plate grid fragments of storage batteries; particle size 4 to 60 mm).
Weight of charge: 1000 kg of the mixture indicated above
High density medium: suspension of lead oxides and lead sulfates (spent filler of storage batteries) in water
Density of the high-density medium: 1.7 g/cm3
Wash water consumption: 2200 1
Rotation speed of the drum: 5 rpm
Duration of dressing: 50 minutes Throughput capacity: 1200kg/h Result of separation:
a) Floating matter
435 kg casing material with 0.9 percent lead metal and 0.1 percent lead compounds adhering as pigment.
b) Sedimentary matter
565 kg lead metal with a residual content of 4.5 percent casing material. The main part of the residual amount of casing material could not be separated because it was still firmly connected with the metal fragments due to inadequate crushing of the batteries.
Claims (8)
1. A process for sink-float treatment (highdensity media segregation), particularly of storage battery scrap, in which the material to be dressed is conveyed to a rotating drum containing the highdensity medium and the sedimentary matter is discharged from the drum in a purely mechanical way, characterised in that the floating matter is also discharged from the drum purely mchanically, so that the high-density medium remains essentially stationary.
2. A device for carrying out the process according to claim 1, having a rotating, preferably conical drum containing the high-density medium, said drum being provided on a front face with an inlet opening for the material to be segregated and on its inner circumference with a lifting rake for discharging the sedimentary matter, characterised in that coaxially to the drum containing the high-density medium, sink-float drum, and with the same, there is provided a preferably conical drum for the sedimentary matter and coaxially within the latter a preferably conical drum for the floating matter, all drums being rotationally fixed to one another, that the ends of the drum for the sedimentary matter and the drum for the floating matter which are arranged within the sink-float drum are closed with the exception of one each inlet opening for the sedimentary matter and the floating matter, respectively, axially penetrate at varying depths into the sink-float drum, the end of the drum for floating matter being provided with a perforated scoop approximately radially projecting along its outer circumference and the axial penetration of the drum for the floating matter into the sink-float drum exceeding that of the drum for the sedimentary matter by at least the axial extension of the scoop.
3. A device according to claim 2, wherein the drum for the floating matter as well as the drum for the sedimentary matter are provided on their extended ends which are positioned outside of the sink-float drum with screen segments and rinsing water spray nozzles are provided within the drum ends for washing the floating matter as well as the sedimentary matter.
4. A device according to claim 2 or 3, wherein the inlet opening with the lifting rake for discharging the sedimentary matter and provided in the closed end of the drum for the sedimentary matter has the form of an open well which is formed by a metal sheet arranged in a position of the drums parallel to the surface of the high-density medium within the sink-float drum and a dam (barrier) sheet inserted vertically in respect of the first sheet, on the one hand, and of the drum for the sedimentary matter and its funnel-shaped extension and the front face sealing sheet at the closed end of the drum for the sedimentary matter, on the other hand, so that the high-density medium, at rotation of the drums, can enter the well from which it is discharged again at further rotation, but cannot enter the drum for the sedimentary matter.
5. A device according to any one of the claims 2 to 4, wherein the scoop is positioned on the outside of the drum for the floating matter pivotably within a limited range around an axis parallel to the direction of the central shaft of the drums, (pivot joint), with the inlet opening at the end of the drum for the floating matter arranged within the zone of the shell of this drum - viewed in rotating direction (R) of the drums - in front of the pivot of the scoop.
6. A device according to claim 5, wherein stops are provided on the drum for the floating matter for limiting the pivoting motion of the scoop.
7. A process for sinkfloat treatment (highdensity media segregation), particularly of storage battery scrap, substantially as herein described and with reference to the accompanying drawings.
8. A device according to claim 2, substantially as herein described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT506779A AT366204B (en) | 1979-07-23 | 1979-07-23 | METHOD AND DEVICE FOR SINK-SWIMMING TREATMENT, ESPECIALLY OF ACCUMULATOR SCRAP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2053737A true GB2053737A (en) | 1981-02-11 |
Family
ID=3571537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7938354A Withdrawn GB2053737A (en) | 1979-07-23 | 1979-11-06 | A process and a device for sink- float separation |
Country Status (5)
| Country | Link |
|---|---|
| AT (1) | AT366204B (en) |
| DE (1) | DE2942713A1 (en) |
| FR (1) | FR2461527A1 (en) |
| GB (1) | GB2053737A (en) |
| IT (1) | IT1129501B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0292815A1 (en) * | 1987-05-14 | 1988-11-30 | Nauchno-Issledovatelski Sektor-Vchti | Process and apparatus for winning enriched fractions from crushed scrap batteries |
| US5373946A (en) * | 1992-12-21 | 1994-12-20 | Olivier; Paul A. | System for media separation of solid particles |
| CN106824502A (en) * | 2017-03-23 | 2017-06-13 | 衢州图艺工业设计有限公司 | A kind of cylinder type fly ash float fisher |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2528192B1 (en) | 2011-05-25 | 2016-06-22 | Erdgas Südwest GmbH | Energy storage device, compound system with energy storage devices and method for operating an energy storage device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB769020A (en) * | 1953-06-08 | 1957-02-27 | Westfalia Dinnendahl Groeppel | Improved apparatus for the dressing or concentration of coal, ore or other minerals |
-
1979
- 1979-07-23 AT AT506779A patent/AT366204B/en not_active IP Right Cessation
- 1979-10-23 DE DE19792942713 patent/DE2942713A1/en not_active Ceased
- 1979-11-06 GB GB7938354A patent/GB2053737A/en not_active Withdrawn
- 1979-11-22 FR FR7928773A patent/FR2461527A1/en active Pending
- 1979-12-28 IT IT2842679A patent/IT1129501B/en active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0292815A1 (en) * | 1987-05-14 | 1988-11-30 | Nauchno-Issledovatelski Sektor-Vchti | Process and apparatus for winning enriched fractions from crushed scrap batteries |
| US5373946A (en) * | 1992-12-21 | 1994-12-20 | Olivier; Paul A. | System for media separation of solid particles |
| CN106824502A (en) * | 2017-03-23 | 2017-06-13 | 衢州图艺工业设计有限公司 | A kind of cylinder type fly ash float fisher |
Also Published As
| Publication number | Publication date |
|---|---|
| AT366204B (en) | 1982-03-25 |
| ATA506779A (en) | 1981-07-15 |
| IT7928426A0 (en) | 1979-12-28 |
| IT1129501B (en) | 1986-06-04 |
| FR2461527A1 (en) | 1981-02-06 |
| DE2942713A1 (en) | 1981-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |