EP0838264B1 - Method and vibratory trough for treating a material to be cleaned - Google Patents

Abstract

The method involves mixing the material with water or other cleaning agent in a first stage. At least one further finishing area (6,10,16) is provided in the conveyor channel (2) separated from a next finishing area by an intermediate wall (12,13). A further washing, rinsing, draining, drying, screening and-or further finishing processes can be carried out. Water or cleaning medium can be supplied to the material being cleaned in the conveyor channel in a separate finishing area whereby a washing process is carried out by vibration agitation. This process can be repeated in a further separate finishing area. Coarse foreign particles are screened out through the screening process.

Description

The invention relates to a method and a vibratory conveyor for treating items to be cleaned according to the generic term of claim 1 and claim 4.

In the basic goods industry, it is often necessary to use raw materials like removing stones and the like from dirt, in order to send them for further processing or after Sort size and texture. For example, it happens before that stones in the chemical industry in the form of a Fine powder can be used for color production. To they are cleaned of all impurities with water, in a further processing stage of water and Dirt residues are freed and then dried, after which in to be crushed dust-finely by a grinding device.

Sometimes it is also necessary to carry out several cleaning stages in a row to go through or additionally a separate one Sieve stage to provide the grain sizes suitable for processing sort out. Since there is usually a separate one for each treatment level Treatment device was necessary, always had to have multiple devices be run through one after the other, resulting in long processing times required and routes and was very expensive.

From EP 0 086 868 B2 an oscillating conveyor device for Known cleaning and cooling of castings. The sand castings placed in a vibratory drum, sprayed with water and perpendicular and transverse to the conveying direction excited with an oscillating force. This will in the Rocking drum the sand hit by the castings and spraying with water makes it quick Cooling achieved, in particular by a helical Circulation in the vibrating drum for good heat transfer leads to the moistened sand. At the end of the vibrating drum a weir is also provided after a sieve line follows. The weir serves only one certain degree of filling and an even distribution of goods ensure to ensure good mixing as well To achieve cooling effect. This method is not suitable especially wet impurities from stones or others Almost completely remove basic materials.

It was therefore conceivable for a specialist, in particular in one Add vibrating conveyor trough water to the basic materials to be cleaned and by means of vibration excitation to wash and in the end to drain the vibratory conveyor trough by sieving and the separate cleaned raw materials from dirt residues. However, this method has the disadvantage that several are required Washing operations or additional sieving or Drying processes these in separate downstream Vibrating, screening or drying devices would have to be done.

From the Patent Abstracts of Japan vol 11, no. 369 (C-461), 2. December 1987 & JP 62 140611 A (Kawase Tekko), June 24, 1987 a vibrating screening device is known which has a straight elongated Vibrating channel has a vibration exciter is obviously excited in the longitudinal direction of the gutter. there is the vibrating trough through three across the conveying direction arranged dividers divided into one in the direction of vibration Represent barrier over which part of the pent-up material over it flows. There is a sieve device in the channel bottom provided by the water-solid mixture dewatered and separated from the fines content. Furthermore are Air nozzles above the vibrating channel for drying the dewatered Funded goods provided. Because with this vibrating screen device the abandoned in all areas of the vibrating trough Water-solid mixture dewatered, sieved and dried are no different with this vibrating screen device Treatments can be carried out.

From DE-AS 10 53 432 it is a combined washing, dewatering and reclassification section for fine-grained goods known on a vibratory conveyor. It is in each case part of the conveyor line for washing, dewatering and Post-classification in the axial direction is provided one behind the other. A gravel-water mixture is added to the washing section, provided in the fine sieves with a mesh size of 0.3 mm through which part of the water and the fine fraction are screened becomes. This is followed by a drainage section without transition, in the so-called raid weirs transverse to the conveying direction are arranged, which are formed as upstanding elastic tongues are. In front of these hold-up weirs are additional Sieves arranged through which the residual water is discharged. there the raiding weirs are intended to ensure that Sand accumulated and this creates additional pressure that pushes the residual water out of the mixture. The Sand that has passed over the raid weirs then becomes seamless conveyed in the longitudinal direction of the channel to the reclassification section, in the wide-meshed sieves are provided, which is another Separate the grains of sand. The uniform Vibrating screen section with different screen sizes and additional hold-up weirs is only for drainage and separation of a water-gravel mixture is suitable because the treatment consequences are only intended for this. In particular is the cleaning of a dry material to be treated with it Combined vibratory conveyor not possible.

DE 38 25 223 A1 describes an oscillation system for separating one Mixture of sand, water and contaminants known. This system consists of a vibrating box, which is a setting zone in the discharge area of the mixture, at which a drainage zone connects in the direction of the vibratory feed. In The setting zone consists of the sand-water mixture of sand off the ground while the light impurities float up and sorted out via an overflow. Between the Setting zone and the drainage zone, a baffle is arranged, a passage gap to the bottom of the swinging box leaves free. Through the running in the longitudinal direction of the swinging box The deposited sand in the Drainage area promoted in the bottom area Sieve is provided. The sieve bottom serves for drainage and for fines screening through above the drainage section provided washing nozzles is improved. This plant too is for separation and dehumidification only water-containing sand mixture suitable because the treatment sequence by the linearly running in the swinging box longitudinal direction Vibration and seamless transfer in the vibrating box can only be tuned to a water-sand mixture. In particular, this screening plant is insufficient for cleaning of dry raw materials, because only a washing stage for the treatment of raw materials is provided is in which by the linear direction of vibration in Swing box longitudinal direction only easily removable impurities are removable.

The invention is therefore based on the object of a method and a device for cleaning raw materials create, in which all necessary treatment stages with be carried out with the least possible expenditure on equipment can.

This object is achieved by the in claim 1 and claim 4 specified invention solved. Continuing education and beneficial Exemplary embodiments are specified in the subclaims.

The inventive solution to the task is based largely to train a vibrating conveyor trough and in the screw-like movement of the conveyed material transversely to the conveying direction to provide at least one or more partition walls, the necessary treatment processes when cleaning the raw materials functionally in a vibrating conveyor trough separate, so that several in a vibrating conveyor independently treatment stages that can be carried out from one another become.

From DE-OS 23 25 254, however, is a method and one Device for the treatment of bulk goods by means of a Vibratory channel is known in the transverse to the in the vibrating channel Direction of conveyance several partition walls are provided. This Partitions serve only to improve the Mixing of the conveyed material and are therefore not suitable to be used to clean raw materials.

The invention has the advantage that by the separation by one or more partitions a variety of treatment processes within a single vibrating trough become. This means, for example, in a vibrating trough also several cleaning, rinsing, sieving or drying processes one after the other possible independently, so that the washed and dried goods can be processed directly can. In particular, this not only means the expenditure on equipment to be kept low, but this is also a shortening the processing time and the processing route possible. There such partitions can also be retrofitted and changed are such a vibrating trough with partitions to the most diverse cleaning processes and the most varied Cleaning goods are adjusted.

In a special embodiment, these partitions both vertically and inclined in the conveying direction, triangular, be trapezoidal or round, so that this advantageously the transition to the next treatment stage is influenced favorably. Furthermore, by the height and location of the partition walls not only the intensity the treatment stages influenced in an advantageous manner but also the conveying speed.

In another special embodiment, in which the Vibrating conveyor trough is tubular, can be advantageous Way the noise level generated and in particular the energy expenditure during the drying process as well as the machine room pollution be kept low.

In another particular embodiment, inside a treatment section additionally inside the Vibrating drum also helical guide body be provided, even with largely symmetrical raw materials like round stones or sugar beets and the like the self-cleaning effect and mixing of each Improve the treatment process in an advantageous manner, since this largely causes the tendency to curl to the inside of the roll can be prevented.

Fig. 1 eine schematische Darstellung einer Schwingtrommel in der Seitenansicht;

Fig. 2 eine schematische Darstellung einer Schwingtrommel im Querschnitt und

Fig. 3 einen Ausschnitt aus einer Schwingtrommel mit Führungskörpern.

The invention is explained in more detail using an exemplary embodiment which is illustrated in the drawing.
Show it:

Figure 1 is a schematic representation of a vibrating drum in a side view.

Fig. 2 is a schematic representation of a vibrating drum in cross section and

Fig. 3 shows a section of a vibrating drum with guide bodies.

Fig. 1 of the drawing shows a schematic vibrating trough 2, the three separate treatment areas 6,8,16 for one item to be cleaned which is separated by two partitions 12, 13 are separated. 2 of the drawing shows a cross section through such a channel 2.

The vibrating channel 2 is tubular and provides one closed vibrating drum. The tubular vibrating trough 2 is on bearings 11 and spring elements 15 on a foundation 18th or supported a frame. The vibrating channel 2 is through two vibration exciters 20 with the aid of a drive device driven. Here linear vibration exciters are preferred or judge exciter used. The vibration exciter generate vibration or force components vertically and transversely to the conveying direction 7 and thus to the channel longitudinal direction. In the Channel 2 results in an asymmetrical distribution of goods with a good surface that runs obliquely to the horizontal 23. In Fig. 2 is the good layer or which is in the vibrating trough the setting of the distribution of the conveyed goods.

The items to be treated are at an entry area 1 21 fed to the vibratory conveyor trough 2 and arrives first into a washing area 10. The items to be cleaned 21 broken stones, for example, from adhering Dirt and dust components should be cleaned. The broken stones are polygonal and have a diameter up to approx. 30 cm. In the vibrating drum 2 can also other raw materials are cleaned, including semi-finished parts and organic raw materials or coarse-grained bulk goods would be conceivable.

The washing area 10 comprises a conveyor line up to one first partition 12, for example about 1/3 of the length of the vibrating trough includes. In the washing area 10 is the items to be cleaned 21 continuously or in via a first irrigation device 3 water or other cleaning liquids at certain intervals fed so that the items to be cleaned 21 almost completely of water or other cleaning fluid is surrounded. In practice there is a ratio of water and 1: 1 items to be cleaned have proven to be advantageous.

The washing area 10 is delimited by the partition 12 lies close to the channel wall. The partition 12 is vertical arranged to the channel wall and transversely to the channel longitudinal direction 7. 2 of the drawing shows that the partition 12th is arranged obliquely to a horizontal plane 22, wherein whose upper edge in the direction of the resulting force 24 of Vibrator 20 is aligned so that the items to be cleaned 21 and the water rest evenly on the partition 12. The position of the partition 12 is variable, so that this also to another direction of impact 24 of the vibration exciter 20 or to special requirements regarding the cleaning effect or the items to be cleaned 21 can be adapted.

The partition 12 can be flat or rectangular in cross-section, triangular, trapezoidal or semicircular or have a similar configuration. The upper edge of the partition 12 is straight according to FIG. 2, but can also have passages, be adapted to the tubular shape of the vibrating channel or have a modified shape. The partition 12 is watertight and sealed from the vibrating drum. With special treatment methods, openings or passages could also be provided in the partition wall 12. The height of the partition is dependent on an optimal degree of filling of the vibrating drum and is advantageously about a quarter of the drum height, but can also be made higher or lower if there are special requirements for the cleaning effect or the throughput.
An example of a flat design of the partition 12 can also be installed inclined in the conveying direction 7 in order to achieve a gentler or faster material transfer to the subsequent treatment stage.

The vibration excitation results in the washing area 10 the vibrating drum has a helical circulation of the items to be cleaned 21, reducing the cleaning effect and promoting is achieved. The vibrating conveyor trough 2 can in the longitudinal direction of the trough 7 roughly horizontal, but also falling or rising be arranged. With a horizontal arrangement, the vibration exciter 20 also power or excitation components in the Generate main conveying direction 7. This is in a falling order not necessary, since the material to be treated 21 is thereby the gravity component is transported in the main conveying direction 7 becomes. When the channel arrangement increases, the excitation component must be be so large in the slope direction that the gravity component overcome and at the same time still a funding movement is achieved in the main conveying direction 7.

In the vibrating conveyor trough 2 arises in the cleaning material flow due to the forces acting transversely to the channel longitudinal direction 7 helical circulating movement of the items to be treated, which is indicated in Fig. 2 by arrows. The items to be cleaned first, according to the direction of the excitation force, moved outwards and upwards on the vibrating channel floor. By the channel shape and the material movement transverse to the channel longitudinal axis 7 there is a cleaning area in which the direction of movement is of the items to be cleaned 21 transversely to the main conveying direction 7 reverses. The items to be cleaned 21 then move in essentially in the upper gut layer again towards the center of the gutter or down. The direction of movement reverses in the lower area around the bottom reversal point again and the items to be cleaned 21 arrives mainly near the bottom of the vibrating trough back out and up.

The vibrating channel 2 can be tubular or semicircular his. However, the channel cross section can also be tub or trough-shaped or polygonal. It is also possible to provide a gutter consisting essentially of at least two levels, surfaces arranged at an angle to each other is formed. In any case, the one described above must be in the channel Transverse movement of the material to be treated 21 may be possible. The The gutter can be open or closed. As a pathogen 20 different types of pathogens can be used, for. B. judge exciter, positively synchronized circular exciter, magnetic exciter, Slider crank mechanisms and other suitable exciters.

Due to the conveying effect in the vibrating drum 2, the crop flow dammed up in front of the partition 12 in the washing area, until it exceeds the partition height and the items to be cleaned 21 over the partition 12 into the next treatment area is promoted. After washing, there is a rinse and Drainage area 6, the same in the longitudinal direction 7 of the channel through a second partition 13 from the subsequent treatment stage is separated. In this rinsing and drainage area 6 a second irrigation device 5 is provided, spraying the items to be cleaned continuously or sporadically with water. At the same time, the drainage area 6 contains in the channel bottom Drainage openings 4 through which the dirty Wash water and fine-grained residues in one underneath drain arranged bunker 14. The treatment level for Drainage and rinsing is about as long as the washing stage, but can also depend on the items to be cleaned and drainage behavior have other dimensions.

After dewatering and rinsing follows the second partition 13 a screening and drying area 16. According to FIG. 1 of the drawing are both partitions 12,13 of the same design. Depending on special requirements due to the items to be cleaned and the Any remaining dirt can be used for the second partition 13 a different shape can also be provided.

In the sieving and drying stage 16, one or more sieves 8 are provided at a distance from the channel bottom, which separate any remaining coarse-grained dirt residues from the cleaned raw material goods 21, the sieved parts also being conveyed into the bunker 14.
In addition, a drying device 9 is also provided in this treatment stage 16, which still frees the cleaning goods 21 from the adhering water residues when these z. B. how the cleaned stones after the outlet 17 are to be fed directly to a grinding device.

In the above-described vibrating conveyor trough 2 can also a separate treatment stage for sieving and drying be provided. Should z. B. each drying or screening after treatment material can be dispensed with, such a could Treatment level also completely eliminated. It is one of those Vibrating channel 2 also conceivable, several separate at the same time Wash levels 10 in a row or alternating with dishwashing and Arrange drainage levels 6 if this is for cleaning of the respective item to be treated is advantageous.

Such cleaning by means of a vibrating conveyor trough 2 is in particular advantageous for polygonal raw materials, because the mutual friction effect the dirt particles particularly well be removed.

In Fig. 3 of the drawing is a section of a vibrating trough 2 shown, 2 conveyor elements on the vibrating trough are provided. These conveying elements are helical extending guide body 25, which is also largely symmetrical Commodities 26 such as round stones or sugar beets prevent a rapid rolling back and at the same time these against each other circulate, so that such a good cleaning effect as achievable with polygonal cleaning goods is. These conveyor elements 25 are preferably in the washing area 10 provided, but also improve the other treatment processes in the rinsing, dewatering, sieving and drying area.

Claims (9)

1. A method for treating material to be cleaned in a vibratory conveying trough (2), particularly for cleaning stones (21, 26) with earth on them, wherein vibration components are produced substantially perpendicularly and transversely to the main conveying direction, the longitudinal direction (7) of the trough, and wherein the material to be cleaned (21, 26) is mixed with water or other cleaning agents at a first stage (10), characterised in that at least one further treatment section (6, 16) is provided in the vibratory conveying trough (2) and is separated by at least one intermediate wall (12, 13) from the next treatment section (6, 16), in which one or more further washing, rinsing, draining, drying and/or screening processes are carried out.
2. The method of claim 1, characterised in that in a separate treatment section water or other cleaning agents are added to the material to be cleaned (21) in the vibratory conveying trough (2) and a washing process is carried out by exciting vibrations, and in a further separate treatment section the process is repeated or the material to be cleaned (21) is rinsed and/or freed of fine-grained foreign constituents by a process of draining the water or cleaning agent.
3. The method of claim 1 or 2, characterised in that in a separate treatment section water or other cleaning agents are added to the material to be cleaned (21) in the vibratory conveying trough (2) and a washing process is carried out by exciting vibrations, and in a further separate treatment section the rinsing and draining process is repeated or the material to be cleaned (21) is freed from the remaining cleaning agents or water by a screening process 16 the coarse-grained foreign constituents are screened out and, simultaneously or in a further separate treatment section, by a drying process (9).
4. Vibratory conveying apparatus for treating material to be cleaned, comprising a vibratory conveying trough (2) and a vibration exciter (20) which produces vibration components substantially perpendicularly and transversely to the main conveying direction, the longitudinal direction (7) of the trough, and contains at a first stage (10)
   in a cleaning section with a watering means (3) for supplying water or other cleaning agents for carrying out the method of one of claims 1 to 3, characterised in that a plurality of treatment sections (6, 10, 16) for treating material to be cleaned (21) are provided and are functionally partitioned off from each other by at least one partition wall (12, 13).
5. The apparatus of claim 4, characterised in that at least one partition wall (12, 13) in the vibratory conveying trough (2) is arranged transversely and perpendicularly to the longitudinal axis of the trough or the main conveying direction.
6. The apparatus of claim 4, characterised in that at least one partition wall (12, 13) is arranged inclined to the longitudinal axis of the trough or the main conveying direction.
7. The apparatus of one of the preceding claims, characterised in that at least one partition wall (12, 13) is flat and rectangular, triangular, semi-circular, trapezoidal or in a modified form thereof in cross-section.
8. The apparatus of one of the preceding claims, characterised in that a washing section (10) with a spray means (3) is provided by a first partition wall (12), and that a rinsing and drainage section (6) with a spray means (5) and drainage holes (4) is functionally separated from a screening and drying section (16) with screening and drying means (9) by a second partition wall (13).
9. The apparatus of one of the preceding claims, characterised in that additional treatment sections are provided on the vibratory conveying trough (2), and the order of the treatment sections may be provided as appropriate and according to the treatment sequence.

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