JP2007289930A - Recovery method and recovery system of valuable substance from crushing residue - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recovery method useful for recycling resources and decreasing a discharged residue amount by improving the efficiency of valuable matter classification treatment of crushed residues and a system for performing the recovery method. <P>SOLUTION: The recovery method involves the step of: crushing recovered crushed residues in a crushing part and separating ferrous materials, non-ferrous metals, and others by a primary magnetic classification part; separating the non-ferrous metals and others into lightweight powder dust and heavy powder dust by wind blast in a wind classification part; and separating the separated lightweight powder and heavy powder respectively into non-ferrous metals and others and non-conductive dust by applying electricity from a secondary magnetic separation part having a conductive part to obtain ferrous materials and non-ferrous metals. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a recovery method for efficiently recovering useful ferrous materials, non-ferrous metals, and the like contained in crushing residues generated by crushing large waste such as coarse garbage, and a method for realizing this recovery method System.

While new production of industrial products and other products has been activated, a large amount of waste is generated. Generally, these wastes are crushed to recover useful metals and then converted into crushed residues, which are then incinerated. And finally landfill.
JP 2005-193095 A

  Conventional recovery methods and recovery systems have poor metal recovery efficiency and contain a large amount of metal in the crushed residue. There is a problem that the furnace wall is damaged by welding. Furthermore, since it is extremely difficult to establish a new landfill site, it is necessary to extend the life of the existing landfill site, and this is expected to establish an efficient waste reduction system.

  In view of the circumstances as described above, the present invention realizes a recovery method that can contribute to the recycling of resources and the reduction of the amount of discharged residue, and the recovery method that makes it efficient to sort valuable materials from crushing residues. It is to provide a system for this purpose.

  In order to achieve the above object, the invention according to claim 1 of the system for recovering valuable materials from the crushing residue according to the present invention, the recovered crushing residue is solved at the crushing part, and the iron material and the non-ferrous metal at the primary magnetic force sorting part A non-ferrous metal and the like, a step of sorting the non-ferrous metals and others into a light dust and a heavy dust by the wind pressure of the wind power sorting unit, and a conductive part for each of the sorted light dust and heavy dust A method for recovering valuable materials from crushing residues, comprising obtaining ferrous materials, non-ferrous metals and others through a step of separating non-ferrous metals and other and non-conductive dusts by conducting electricity from a secondary magnetic force sorting section.

  The system for realizing the method for recovering valuable materials from the crushing residue according to claim 1 includes a crushing unit, a wind power sorting unit, a primary magnetic sorting unit, and a secondary lightweight material magnetic sorting unit, as in claim 2. A crushing part having a receiving part for crushing residue and a cleaving part, and a conveying part for sending the crushing residue solved by the cleaving part to a primary magnetic force sorting part. The primary magnetic force sorting unit has a conveyance path for sorting ferrous material and non-ferrous metals and other contained dust and sending the non-ferrous metals and other contained dust to the wind sorting unit, While sorting dust containing metal and other materials into light dust and heavy dust by wind pressure, it has a light material transport path that sends light dust to the secondary light material magnetic force sorting unit, and heavy dust is separated from the secondary heavy material magnetic force sorting unit. A heavy-duty conveyance path to be sent to Heavy magnetic separator unit is characterized by having a conductive portion for sorting conductively nonferrous metals contain other to the respective lightweight dust and weight dust and non-conductive dust types.

  Examples of the collection destination of the crushing residue include local governments and companies. On the other hand, examples of the type of crushing residue to be collected include those for landfill and those that are sent to incineration. In addition to non-ferrous metals and other materials, lightweight dust means resin dust such as waste plastic after crushing, or dust that can be blown away by wind from blowers such as lint and rubber. It means that there is a weight that is not blown away by other wind power. The conveyance unit may be any means that can send out the crushing residue every time it moves to each step in a series of processing steps from the collection of the crushing residue to the selection of nonferrous metals and other contained in the crushing residue. Examples include conveyors, feeders and chutes.

  The invention described in claim 2 according to the present invention includes a step of feeding non-ferrous metals and the like separated by the secondary magnetic force sorting part into the sieve part, and a non-ferrous metal and the like having a particle diameter of 10 mm to 110 mm by the sieve part. It is characterized in that ferrous materials, non-ferrous metals and others are obtained through a step of sorting and feeding into a heavy liquid sorting unit.

  The system for realizing the valuable material recovery method from the crushing residue according to claim 2 is a non-ferrous metal or the like obtained by the secondary light weight magnetic force sorting section and the secondary heavy weight magnetic force sorting section as in claim 4. , Transported to a heavy liquid sorting section, the heavy liquid sorting section includes the non-ferrous metals and other storage section, and the storage section stores heavy liquid, The intake side is provided with a sieve part for selecting only non-ferrous metals and others having a particle diameter of 10 mm to 110 mm and putting them in the housing part.

  The heavy liquid sorting unit floats and discharges the components contained in the crushing residue put into the storage unit with a specific gravity lower than that of the heavy liquid, while the remaining one in the heavy liquid is transferred by a conveyor or other transport means. Valuable non-ferrous metals and other materials are collected by sending them out of the housing. The sieving part specifically uses a trommel or a vibrating hopper, and the particle size range of the crushing residue processed in the heavy liquid sorting part is different in the specific gravity of the heavy liquid as long as the particle diameter is smaller than 10 mm. However, if the particle size exceeds 110 mm, the burden on the heavy liquid sorting section (damage of the inner wall of the heavy liquid storage section, excessive weight on the transport means) is difficult. This is because the load on the machine is large. The storage unit may replace heavy liquids having different specific gravities depending on what is selected, or may be provided with a plurality of storage units that store heavy liquids having different specific gravities.

  According to the method and system for recovering valuable materials from crushed residues according to the present invention (which will be an unprecedented invention), for example, ferrous materials, non-ferrous metals and the like are collected from crushed residues for landfill and incineration. This makes it possible to recover valuable materials (ferrous materials and non-ferrous metals) that are normally disposed of by disposal, and if the crushing residue is for landfill by collecting ferrous materials and non-ferrous metals, While it can contribute to space saving at a finite landfill site, if it is a crushing residue for incineration, damage in the furnace due to adhesion of molten ferrous materials, non-ferrous metals and others can be minimized. In addition, the residue content is extremely low after crushing processing of bulky trash, etc., and it is possible to sort ferrous materials, non-ferrous metals, etc. with high accuracy, so it is possible to acquire valuable resources with higher value. Reusability will increase.

  According to the system for recovering valuable materials from the crushing residue according to claim 3 of the present invention, the crushing residue containing non-ferrous metals and the like having a uniform particle diameter within a certain range is subjected to a sorting process, whereby The acquisition efficiency is increased, and the components of the heavy liquid sorting unit used in the present invention can be protected.

  FIG. 1 is a plan view showing the entire primary processing equipment A of a recovery system for realizing a method for recovering valuable materials from crushing residues according to this embodiment, and FIG. 2 is a side view of the crushing unit 1. 3 is a side view of the primary magnetic force sorting unit 3a, FIG. 4 is a side view showing the operating state of the wind force sorting unit 2, and FIGS. 5 (a) and 5 (b) are secondary light weight magnetic force sorting units. 3b is a side view showing the operating state of the secondary heavy material magnetic force sorting unit 3c, FIG. 6 is a block diagram showing a processing procedure of the secondary processing equipment B, and FIG. FIG. 8 is a side view showing the operating state of the heavy liquid sorting unit 4.

  As shown in FIG. 1, the system for recovering valuable materials from crushing residues according to this embodiment is composed of a primary processing equipment A and a secondary processing equipment B, and the primary processing equipment A mainly has been recovered by the crushing unit 1. The process of unraveling the crushing residue or untreated waste 38, the process of sorting the ferrous material 26 and non-ferrous metals and other contained dust 30a by the primary magnetic sorting unit 3a, and the non-ferrous metals and other contained dust 30a by the wind sorting unit 2 are lightweight. A process of sorting the dust 27 and the heavy dust 28, a process of sorting the lightweight dust 27 and the non-ferrous metals 30b by the secondary light weight magnetic force sorting section 3b, and a weight dust 28 by the secondary heavy weight magnetic force sorting section 3c. And the non-ferrous metals and others 30b are sequentially processed. In particular, the non-ferrous metals and others 30b recovered from the secondary light-weight magnetic force sorting section 3b are generally the highest. Because referred for disposal, recovering the nonferrous metals other 30b and conveyed to the secondary light was magnetic separator unit 3b will be reduced in the final residue to enhance the recovery accuracy. On the other hand, the secondary processing equipment B mainly selects the non-ferrous metals and other 30b obtained by the primary processing equipment A at the sieve section 16 and having a particle size within a certain range. For the ones that are arranged within a certain range, the heavy liquid sorting unit 4 performs a sorting process by the difference in specific gravity of the components contained in the non-ferrous metals and other 30b.

  As shown in FIG. 1, the primary processing facility A sequentially includes a crushing unit 1, a wind sorting unit 2, a primary magnetic sorting unit 3 a, a wind sorting unit 2, and a secondary light weight magnetic force in accordance with a procedure in which processing is performed. A sorting unit 3b and a secondary heavy material magnetic force sorting unit 3c are provided, on each input side of the wind power sorting unit 2 / primary magnetic material sorting unit 3a / secondary light material magnetic force sorting unit 3b / secondary heavy material magnetic force sorting unit 3c. Are arranged with a hopper for charging crushing residue D, respectively, on the discharge side of wind power sorting unit 2 / primary magnetic force sorting unit 3a / secondary light weight magnetic force sorting unit 3b / secondary heavy weight magnetic force sorting unit 3c, Conveyor of non-ferrous metals and other contained dust 30a or non-ferrous metals and other 30b sorted by the wind sorting unit 2 / primary magnetic force sorting unit 3a / secondary light weight magnetic force sorting unit 3b / secondary heavy weight magnetic force sorting unit 3c 5a and 5b are provided. The input hopper serves as an inlet for the crushing residue D collected from the crushing unit 1 or another contractor to the main recovery system, and the conveyors 5a and 5b are the wind sorting unit 2 / primary magnetic force sorting unit 3a / secondary lightweight material. The crushing residue D sorted by each of the magnetic sorting unit 3b / secondary heavy article magnetic sorting unit 3c serves as a means for shifting to the next step (see FIG. 1).

As shown in FIGS. 1 and 2, the crushing unit 1 has a crushing chamber 23 provided with a receiving unit 21 and a discharge unit 22 respectively, and a rotor (unrolling unit) 24 that rotates in the crushing chamber 23 longitudinally. A plurality of hammers (unrolling parts) 25 are arranged on the outer peripheral surface of the rotor 24, and each hammer 25 is applied to the recovered crushing residue or untreated waste 38 carried from the receiving part 21 by the high-speed rotation of the rotor 24. The crushed residue D crushed from the discharge unit 22 is sent to the primary magnetic force sorting unit 3a by the conveyor 5a.

  As shown in FIG. 1 and FIG. 3, the primary magnetic force sorting unit 3 a uses a ferrous material 26, non-ferrous metals, and other contained dust 30 a to remove the crushing residue D sent from the crushing unit 1 through the conveyance path 6 a by the magnetic force of the permanent magnet 15. It is divided into. In addition, the primary magnetic force sorting unit 3a has a driving pulley 12a and a driven pulley 13 arranged on the terminal side of the conveyor 5a continuous from the crushing unit 1 so as to be in a horizontal positional relationship with a space therebetween, and driven. A belt 14a is stretched between the pulley 12a and the driven pulley 13, and a permanent magnet 15 is disposed below the belt 14a, and is contained in non-ferrous metals and other contained dust 30a conveyed on the belt 14a. The iron material 26 was formed to flow while adsorbing. The iron material 26 adsorbed on the belt 14a by the magnetic force of the permanent magnet 15 passes through the iron material conveying chute 6b and is conveyed to the iron material collecting unit 11 by the conveying conveyor 5b. A non-ferrous conveyance path 6a continues to the wind power sorting unit 2 immediately below the permanent magnet 15, and the conveyance path 6a is non-ferrous metals other than the iron material 26 that is not adsorbed to the permanent magnet 15 and other contained dust 30a. Will pass.

  As shown in FIG. 4, the wind power sorting unit 2 divides the non-ferrous metals and other contained dust 30a sent through the transport path 6a into light dust 27 and heavy dust 28 by wind power. Moreover, the said wind force selection part 2 has the branch chamber 7, the blower 8, the lightweight article conveyance path 9a, and the heavy article conveyance path 9b. The branch chamber 7 has a communication port with the transfer path 6a (see also FIG. 1). In the branch chamber 7, a non-ferrous metal and other contained dust 30a sent from the transfer path 6a is blowered. Although the specific gravity is slightly changed by factors such as the season due to the blowing from 8, light weight dust 27 of about 0.9 or less is sent to the secondary light material magnetic force sorting unit 3b through the light material conveyance path 9a. On the other hand, the heavy dust 28 that has not been blown off by the blower from the blower 8 performs processing to be sent to the secondary heavy material magnetic force sorting unit 3c through the heavy material conveyance path 9b.

  Since the secondary light weight magnetic force sorting section 3b and the secondary heavy weight magnetic force sorting section 3c have substantially the same configuration, only the secondary light weight magnetic force sorting section 3b will be described (the secondary light weight magnetic force sorting section 3b and the secondary light weight magnetic force sorting section 3b Non-ferrous metals from which most of the iron material 26 obtained through the wind-power sorting unit 2 and the primary-magnetism sorting unit 3a has been removed are hereinafter referred to as secondary-magnetism sorting units 3b and 3c). As a means for taking in other contained dust 30a (including lightweight dust 27 and heavy dust 28), a material charging feeder 10 is provided on the intake side. It is arranged at a position immediately below the terminal end of 5 g, and takes in non-ferrous metals and other contained dust 30 a falling from the terminal end of the conveyer 5 g into the secondary magnetic force sorting units 3 b and 3 c. On the other hand, on the discharge side of the secondary magnetic force sorting units 3b and 3c, a dust storage unit 36 and a non-ferrous metal other storage unit 37 are arranged in parallel in order from the process progress direction. As shown in FIGS. 5 (a) and 5 (b), the secondary magnetic force sorting sections 3b and 3c have a driving pulley 12b on the material charging feeder 10 side and a magnet pulley (conductive section) on the side away from the material charging feeder 10. 29 is arranged so as to have a horizontal positional relationship with an interval, and a belt 14b is stretched between a drive pulley 12b and a magnet pulley (conductive portion) 29. Further, the magnet pulley (conductive portion) 29 conducts non-ferrous metals and other 30b contained in the non-ferrous metals and other contained dust 30a flowing on the belt 14b by the rotation thereof to generate eddy current and generate this eddy current. Since the non-ferrous metals 30b repels the magnetic field around the belt 14b, the non-ferrous metals 30b are repelled toward the conveying direction of the belt 14b. On the other hand, the non-ferrous metals and other dusts 34 other than 30b mainly fall in the vicinity of the end of the belt 14b without conducting electricity because they are mainly non-conductive materials such as plastic, urethane, and wood. Therefore, the dust storage unit 36 is disposed on the side close to the primary magnetic field selection unit 3a and the secondary magnetic field selection units 3b and 3c by using eddy current, and the non-ferrous metal storage unit 37 is disposed on the remote side. Then, the non-ferrous metals and other 30b are collected by sorting and removing from the dusts 34.

  When the primary processing equipment A is configured as described above, first, the crushing residue D solved by the crushing unit 1 is sorted into the iron material 26 and the non-ferrous metals and other contained dust 30a by the primary magnetic sorting unit 3a, and at the wind sorting unit 2 Sort into light dust 27 and heavy dust 28. Further, the light dust 27 is a secondary light weight magnetic force sorting unit 3b, and the one heavy dust 28 is a secondary heavy weight magnetic force sorting unit 3c that separates and removes the dust 34 to recover non-ferrous metals and other 30b. Made.

  Next, as shown in the block diagram of FIG. 6, the secondary processing equipment B is a sieve for distributing the non-ferrous metals and other 30b transported from the primary processing equipment A and the non-ferrous metals and other 30b according to the particle size. And a heavy liquid sorting unit 4 for sorting non-ferrous metals and others 30b according to the difference in specific gravity.

  As shown in FIG. 7, the sieve portion 16 includes a rotary filter 35 inside the sieve 17, and the sieve 17 is gently inclined from the intake side to the discharge side of non-ferrous metals and other 30b. The rotary filter 35 has a cylindrical shape centering on the same inclination axis as the inclination of the sieve 17, and has a large number of small-diameter round holes 32 having a diameter of more than 10 mm on the carry-in side of the cylindrical peripheral wall. On the other hand, the discharge side has many large-diameter round holes 33 having a diameter of 110 mm or more, and the rotary filter 35 is rotated by a hydraulic motor or the like. The non-ferrous metal carried from the primary processing facility A by a transport vehicle or the like. The other 30b is taken into the sieve section 16 by the conveyor 5c, and a small particle size product having a particle size of 10 mm or less and a particle size of 10 mm to 110 mm in the sieve 17 by the rotary filter 35. It is within Chutsubu 径物 and is to divide the large 径物 exceeding 110 mm. First, the non-ferrous metals and other materials 30b that have been introduced are, after a small particle diameter of 10 mm or less is dropped to the bottom of the sieve 17 by the small-diameter round hole 32 of the rotary filter 35, and then the outside of the sieve 17 through a conveyor. It is recovered by discharging it. Next, the non-ferrous metals and others 30b in the particle diameter range of 10 mm to 110 mm included in the non-ferrous metals and others 30b exceeding the particle diameter of 10 mm remaining in the sieve 17 pass through the large-diameter round holes 33 to the bottom of the sieve 17. Large particles having a particle diameter exceeding 110 mm that have been dropped and remain on the rotary filter 35 are collected as they are after being discharged out of the sieve 17 through the conveyor. And the nonferrous metals etc. 30b which are in the range of particle size 10 mm-110 mm are sent into the heavy liquid selection part 4 from the inside of the sieve 17 through the conveyance conveyor 5f (refer FIG. 8 explaining the heavy liquid selection part 4).

  As shown in FIG. 8A, the heavy liquid sorting unit 4 forms a hollow storage portion S, and the supply pipe 18 for the heavy liquid 31 is communicated with the storage portion S. Further, in the housing portion S, there are a supply chute 19a for non-ferrous metals and others 30b and a discharge chute 19b for discharging the non-ferrous metals and others 30b from the inside of the housing portion S. In the storage part S, magnesium / rubber / resin, etc., which is lighter than the specific gravity of the heavy liquid 31 in the non-ferrous metals and others 30b, floats, and these components become waste liquid by continuing to supply the heavy liquid 31 to the storage part S. It overflows from the discharge port 19c, is discharged out of the storage unit S, and is sent to a valuable material (lightweight material) recovery unit. And heavy metals (iron, copper, zinc, brass, lead, stainless steel, etc.) heavy in specific gravity sinking in heavy liquid 31 of the storage unit S, non-ferrous metals and other 30b containing a lot of aluminum are contained in the storage unit S by the conveyor 5h. Is transported to a position above the water level of the heavy liquid and is sent from the discharge chute 19b to a collection unit for valuable materials (heavy specific gravity). Next, with respect to the recovery of aluminum and heavy metals, as shown in FIG. 8B, the heavy liquid 31 having a specific gravity higher than that of the heavy liquid 31 used when recovering the magnesium / rubber / resin is supplied to the storage unit S. In addition, the non-ferrous metals and other materials 30b containing a lot of heavy metals are again put into the housing part S, so that the aluminum floats. As in the above-described magnesium / rubber / resin sorting, the heavy liquid 31 As a result, the waste liquid discharge port 19c overflows and is discharged out of the storage unit S, and sent to a valuable material (aluminum) recovery unit.

  When the secondary processing equipment B is configured as described above, the non-ferrous metals and other 30b sent from the primary processing equipment A are transferred within the range of 10 mm to 110 mm in the sieve section 16 before being transported to the heavy liquid sorting section 4. By adjusting the diameter, it is difficult to recover valuable non-ferrous metals and other 30b, and a small particle size of less than 10 mm, and 110 mm that would give an excessive burden to each component part of the heavy liquid sorting unit 4 Those having a larger particle diameter can be removed in advance, and the nonferrous metals and other 30b that become valuable resources can be efficiently selected. Further, a small particle size material having a particle size of 10 mm or less is recovered as it is, or nonferrous metals and other 30b remaining in the small particle size material are removed by an apparatus having substantially the same configuration as the above-described secondary magnetic force sorting units 3b and 3c. Sort and collect. Furthermore, the large particle size exceeding 110 mm is in a state where the amount sent to the secondary processing equipment B is small and the non-ferrous metals and other 30b can be easily recovered without being sent to the heavy liquid sorting unit 4. This reduces the volume of the crushing residue D to the minimum, and it becomes a final residue with a very low content of metals. When the final residue is incinerated, there is an effect on the furnace wall of the incinerator by the molten metal. In addition, there is almost no waste volume, and the landfill site space can be effectively utilized by minimizing the volume of the residue.

It is a top view which shows the whole primary processing equipment of this invention. It is a side view which shows the outline | summary of a crushing part. It is a side view which shows a primary magnetic force selection part. It is a side view which shows a wind-power selection part. It is a side view of a secondary heavy article magnetic force selection part and a secondary light weight magnetic force selection part. It is a block diagram which shows the process sequence of a secondary processing equipment. It is a side view which shows a sieve part. It is a side view of a heavy liquid selection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crushing part 2 Wind power selection part 3a Primary magnetic force selection part 3b Secondary light weight magnetic force selection part 3c Secondary heavy weight magnetic force selection part 4 Heavy liquid selection part 5a, 5b, 5c, 5f, 5g, 5h Conveyor (conveyance part)
6a Conveying path 9a Lightweight material conveying path 9b Heavy material conveying path 16 Sieve part 21 Receiving part 24 Rotor (dissolving part)
25 Hammer (Unlocking part)
26 Iron Material 27 Lightweight Dust 28 Heavy Dust 30a Nonferrous Metals and Other Contained Dust 30b Nonferrous Metals and Others 29 Magnet Pulley (Conducting Part)
31 Heavy liquid 34 Dust A Primary treatment equipment B Secondary treatment equipment D Shredded residue S Containment section

Claims (4)

  The recovered crushing residue is broken up at the crushing section, and the primary magnetic sorting section sorts into ferrous materials and non-ferrous metals and others, and the non-ferrous metals and others sort into light dust and heavy dust by the wind pressure of the wind sorting section. Steps and a step of separating non-ferrous metals and other non-conductive dust by conducting from a secondary magnetic force sorting unit having a conductive part for each of the selected light dust and heavy dust, A method for recovering valuable materials from crushing residues characterized by obtaining non-ferrous metals and others.   The step of putting the non-ferrous metals and the like separated by the secondary magnetic sorting unit into the sieve unit, and the sorting unit sorting out only the non-ferrous metals and others having a particle size of 10 mm to 110 mm and putting them into the heavy liquid sorting unit. The method for recovering valuable materials from crushing residues according to claim 1, wherein ferrous materials, non-ferrous metals and others are obtained through the step. A crushing section (1), a wind power sorting section (2), a primary magnetic sorting section (3a), a secondary light weight magnetic sorting section (3b), and a secondary heavy weight magnetic sorting section (3c),
The crushing part (1) includes a crushing residue (D) receiving part (21) and a breaking part (24, 25), and the crushing residue (D) solved by the breaking part (24, 25). Is conveyed to the primary magnetic sorting unit (3a), and the primary magnetic sorting unit (3a) sorts the iron material (26) and the non-ferrous metal and other contained dust (30a) and It has a conveyance path (5a) for sending non-ferrous metals and other contained dust (30a) to the wind sorting section (2), and the wind sorting section (2) is lightweight by wind pressure with the non-ferrous metals and other containing dust (30a). While having a light weight conveyance path (9a) which sends light weight dust (27) to a secondary light weight magnetic force magnetic separation part (3b) while sorting to dust (27) and heavy weight dust (28), heavy weight dust (28) Has a heavy material conveyance path (9b) for sending the secondary heavy material to the magnetic force sorting unit (3c) The mass magnetic force sorting part (3b) and the secondary heavy weight magnetic force sorting part (3c) are electrically non-conductive by conducting non-ferrous metals and others (30b) contained in the light dust (27) and heavy dust (28), respectively. A system for recovering valuable materials from crushing residues, which has a conductive part (29) for sorting out the dusts (34). The non-ferrous metals and others (30b) obtained by the secondary light weight magnetic force sorting section (3b) and the secondary heavy load magnetic force sorting section (3c) are to be transported to the heavy liquid sorting section (4),
The heavy liquid sorting section (4) has a storage section (S) for the non-ferrous metals and others (30b), and a heavy liquid (31) is stored in the storage section (S), The intake side of the housing part (S) includes a sieve part (16) for selecting only non-ferrous metals and others (30b) having a particle diameter of 10 mm to 110 mm and feeding them into the housing part (S). The system for recovering valuable materials from crushing residues according to claim 3.