JP2518800B2 - Pretreatment method for heavy liquid sorting - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pretreatment method for heavy liquid sorting, and more particularly to a pretreatment method for heavy liquid sorting which can be used when recovering valuable metals from dust from crushed automobiles and the like.

[0002]

2. Description of the Related Art A scrapped automobile or the like is crushed into small pieces of 50 to 60 mm by a preshredder and a shredder, and then separated into light dust and heavy dust by a wind separator, and the heavy dust is separated by a magnetic separator. The scrap iron is removed and the scrap iron is recovered as a resource. And
In the remaining heavy dust from which scrap iron has been removed, non-ferrous metals such as copper, aluminum, zinc, and stainless steel, and glass,
Since non-ferrous metals are mixed with rubber and glass, they are separated by wind separation or their electrical properties, and copper, aluminum, zinc, stainless steel, etc. in the non-ferrous metals are further separated. The dust, etc. were separated by hand.

[0003]

However, in the conventional sorting method, nonferrous metals such as copper, aluminum, zinc, and stainless steel are separated by hand in this way,
The work was troublesome and the work efficiency was extremely poor. Therefore, the present inventor, as disclosed in JP-A-6-142546, puts a processing raw material into a sorting container in which a heavy liquid mixed with magnetic powder such as magnetite is stored in order to solve this problem. Then, we proposed a method for sorting light and heavy mixtures that sorts out floating lightweight materials such as aluminum and other sedimenting heavy materials due to the difference in specific gravity. However, in the heavy liquid sorting method, when impurities such as dust and oil are present in the raw material for processing, dust and oil are mixed in the heavy liquid, and as a result, the viscosity of the heavy liquid is increased and further adhered to the processing raw material and dust. There is a problem that air is mixed with the heavy liquid to generate bubbles, which makes it difficult to separate the processing raw material into a lightweight material and a heavy material. Then, the inventor of the present application tried a shower cleaning in which water is sprayed from above the processing raw material as a countermeasure, but since the cleaning water is not sprayed onto the entire surface of the processing raw material, sufficient cotton dust and Removal of oil was difficult. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a heavy liquid sorting pretreatment method capable of efficiently performing heavy liquid sorting of a processing raw material.

[0004]

A method according to the above-mentioned object.
The heavy liquid sorting pretreatment method described is a heavy liquid that puts a processing raw material into a sorting container in which the heavy liquid is stored, and sorts the processing raw material into a lightweight material that floats due to a difference in specific gravity and a heavy material that sediments. In performing the sorting, in advance, the treatment raw material to be put into the sorting container is put into a washing container in which a water blowing portion is provided in an intermediate portion and an upper part has a rising water flow from the water blowing portion,
The rising water flow cleans the dust and oil content adhering to the input processing raw material and positively floats and removes the dust and oil content. Further, in the heavy liquid sorting pretreatment method according to claim 2, in the method according to claim 1, the amount of water in the water washing container is 20 times or more the weight of the treatment raw material.

[0005]

The washing container used in the pretreatment method for heavy liquid sorting according to claims 1 and 2 is provided with a water blowing portion in the middle portion thereof, and since the upper portion from the water blowing portion has a rising water flow, As for the thrown in thing, even if the specific gravity is 1 or a little larger than 1, naturally, the thing with specific gravity smaller than 1 is flown by the rising water flow and floats. Therefore, when the treatment raw material is put into the water washing container, dust, oil and the like which are washed by the rising water flow and separated during the descending flow are positively flowed upward by the rising water flow to be removed. Therefore, almost no dust or oil is attached to the treated raw material settled to the lower portion from the water washing container. Therefore, when the treated raw material taken out of the water washed container is put into the sorting container and sorted, the heavy liquid Since the viscosity does not increase or the actual specific gravity of the heavy liquid does not decrease, it is possible to efficiently separate the heavy liquid into the light one and the heavy one. Particularly, in the heavy liquid sorting pretreatment method according to the second aspect, since the amount of water in the washing container is 20 times or more the weight of the treatment raw material, a sufficient washing effect can be obtained.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a schematic view of a main part of a heavy liquid sorting facility to which a heavy liquid sorting pretreatment method according to an embodiment of the present invention is applied, and FIG.
Shows an overall schematic view of a heavy liquid sorting facility to which the heavy liquid sorting method is applied.

As shown in FIG. 2, in the heavy liquid sorting equipment 10 to which an embodiment of the present invention is applied, a scrap car is crushed into 50 to 60 mm or less by a pre-shredder and a shredder,
A long sorter 11 that sorts small items, large items, long items such as electric wires and wires from the processing raw materials from which light dust has been removed by a well-known wind force sorter and magnetic substances such as iron have been removed by a magnetic force sorter 11. A washing machine 12 for washing dust and oil content adhering to the selected treatment material of a predetermined size with water, and a heavy liquid sorting machine 16 for separating the treated material after washing with the heavy fluid 13 into a light weight article 14 and a heavy article 15. And a pair of draining sieves 17 and 18 for washing off the heavy liquid 13 adhering to the selected lightweight articles 14 and heavy articles 15 and the respective draining sieves 17 and 18
Water tank having a magnetic separator 19 for adsorbing and separating the magnetic powder in the heavy liquid 13 discharged from the separator, and a discharge conveyor 20 for discharging the impurities in the waste water stored in the bottom of the magnetic separator 19 and sinking to the bottom. 21, a demagnetizer 22 for the magnetic powder adsorbed by the magnetic separator 19, and a heavy liquid tank 24 for supplying the heavy liquid 13 demagnetized by the demagnetizer 22 to the heavy liquid sorter 16. .

A carry-in device 25 composed of a plurality of conveyors is arranged upstream of the long-sized sorter 11 which is a cylindrical sieve-shaped rotating body. Below the long-sized sorter 11, small articles,
A large-sized or long-sized sorting device 26 is arranged, and the sorted products are stored in a small-sized collection box 27, a large-sized collection box 28, and a long-sized collection box 29, respectively.

As shown in FIG. 1, the washing machine 12 has a large-sized, substantially rectangular tubular washing container 30.
A trough-shaped dust discharging section 30 for receiving the unwanted matter D such as dust and oil floating up by washing with water in the raw material charging section 30a
c is provided. Further, from the lower part of the water washing container 30 to the raw material discharge part 30b, a discharge conveyor 31 provided with a large number of scraping plates at a constant interval is provided between the driven chains to be inclined. In addition, a circulating water tank 30A is provided on the upper and lower peripheral side surfaces on the charging side of the washing container 30.
A pair of upper and lower water outlets 32 of water pumped by the pump 30B (see FIG. 2) are provided. The amount of water in the washing container 30 is about 20 times the weight of the processing raw material so that a sufficient washing effect can be obtained (for example, the processing raw material 4).
80 m ^{3 of} water with respect to ton), and the water blowing direction of the water blowing unit 32 is obliquely upward. Dust and oil attached to the treated raw material by washing with water overflow from the dust discharge section 30c provided in the raw material input section 30a and flow into the dust box 30C.
Are collected (see FIG. 2).

Similarly, as shown in FIG. 1, a heavy liquid sorter 16
Is a device having substantially the same shape as the water washing machine 12, and is a sorting container 33 as a main body, a pair of upper and lower blowing portions 34 for the heavy liquid 13 formed on the peripheral side surface of the sorting container 33 on the input side, and the sorting container 3
3 has a discharge conveyor 35 composed of a chain conveyor that discharges dust (glass or the like) that has settled in, a heavy material 15 such as copper, zinc, stainless steel, iron, etc. The apparent specific gravity of γ = 2.5) is increased (γ = 2.7), and the mixed aluminum is selected. The lightweight material 14 such as aluminum flows out from the trough-shaped lightweight material discharging portion 33c provided in the raw material charging portion 33a of the sorting container 33, and the heavy material 15 is discharged from the discharging conveyor 3
5 is discharged from the heavy-weight discharge part 33b of the sorting container 33. As shown in FIG. 2, the lightweight object 14 is a heavy liquid sorter 16
Is discharged together with the heavy liquid 13 and is sifted by the heavy liquid separating screen 36 before being sent to the draining screen 17. The wastewater discharged from the heavy liquid separation sieve 36 is temporarily stored in the tank 36a and separated into the heavy liquid 13 and water containing impurities, and the heavy liquid 13 is returned to the heavy liquid tank 24 while Is sent to the magnetic separator 19 together with the drainage containing impurities discharged from the draining screens 17, 18.

Below the draining screens 17 and 18, a lightweight hopper 37 and a heavy hopper 38 are disposed, respectively, and a pair of feeders 39 are provided below the discharge parts of both hoppers 37 and 38. Below the feeder 39, a sorting conveyer 41, in which a magnetic separator 40 is suspended above the downstream, is arranged. The magnetic separator 40 adsorbs and removes iron in the lightweight objects 14 and the heavy objects 15 to remove the iron. Dropped into 42. A feeder 43 is arranged below the sorting conveyor 41 on the downstream side, and a non-ferrous sorting machine 44 applying the principle of a linear motor is arranged below the feeder 43. Below the non-ferrous sorter 44, a sorting device 45 composed of a plurality of conveyors is arranged.
By separately introducing the heavy object 15 and the heavy object 15, the separated aluminum, dust, copper, zinc, and stainless steel are recovered in the aluminum recovery box 46, the dust recovery box 47, the copper-zinc recovery box 48, and the stainless steel recovery box 49. It

In the figure, reference numeral 50 is a water supply pump, reference numeral 51 is a dust box of impurities such as copper wire, reference numeral 52 is a heavy liquid pump, and reference numeral 53 is a heavy liquid for storing a heavy liquid having a specific gravity higher than that of the heavy liquid 13 used. The tank, reference numeral 54, represents a densitometer.

Next, the operation of the heavy liquid sorting equipment 10 will be described. As shown in FIG. 2, the processing raw material from which the light dust and scrap iron have been crushed and removed is introduced into the long sorter 11 by the carry-in device 25 to remove small items, large items and long items, and the removed items are separated by the sorting device 26. As a result, the small item collection box 27, the large item collection box 28, and the long item collection box 29 are collected.

As shown in FIG. 1, only the treated raw material having a predetermined size is conveyed to the water washing machine 12 and is dropped into the water washing container 30 from the raw material feeding portion 30a to descend in water. On the other hand, from the water blowing portion 32 formed in the water washing container 30, water is blown obliquely upward due to the pressure of the pump 30B, and when this becomes a rising water flow and is sprayed on the processing raw material that is descending, water is fed. Undesired substances D such as oil and dust contained in the oil float up and flow down from the water surface into the dust discharge unit 30c, and then are dropped into the dust box 30c and collected. In addition, the waste water taken out from the bottom surface of the washing container 30 flows down into the circulating water tank 30A, and the pump 30B
By this, the water is circulated and used as water for the water washing machine 12, and the impurities accumulated in the circulating water tank 30A are discharged to the dust box 30C by a built-in conveyor.

The treated raw material from which the unnecessary substances D have been removed is lifted up to the raw material discharge section 30b by the carry-out conveyor 31 arranged at the lower part of the water washing machine 12, and then the raw material is put into the sorting container 33 of the heavy liquid sorting machine 16. The liquid is put into the portion 33 a and separated into the light weight 14 and the heavy weight 15 by the heavy liquid 13 in the sorting container 33. At this time, since the treatment raw material thrown into the heavy liquid sorter 16 has almost no adhering of the unnecessary substances D such as dust and oil and air due to the effective washing by the washing machine 12, it is taken out from the washing container 30. When the processing raw material is put into the heavy liquid sorting machine 16 and sorted, bubbles are not generated on the liquid surface of the heavy liquid 13, and the processing raw material is efficiently and lightly weighted.
It is possible to sort heavy liquid into the heavy load 15 and the heavy load 15.

The selected lightweight articles 14 are transferred to the lightweight article discharge section 3
3c is sent to the draining screen 17 through the heavy liquid separating screen 36, and the heavy object 15 to the counter 3c is sent to the draining screen 18 from the heavy object discharging part 33b by the discharging conveyor 35. The lightweight objects 14 and the heavy objects 15 separated by the draining screens 17 and 18 are once stored in the lightweight object hopper 37 and the heavy object hopper 38, respectively, and after a staggered time, they individually fall onto the sorting conveyor 41 by the feeder 39. And then feeder 4
Various metals are separated by the non-ferrous sorter 44 via 3, and each metal is recovered by the sorting device 45 into the aluminum recovery box 46, the dust recovery box 47, the copper zinc recovery box 48, and the stainless recovery box 49. The iron contained in the processing raw material is adsorbed by the magnetic separator 40 suspended downstream of the selection conveyor 41 and recovered in the iron recovery box 42.

The drainage containing impurities such as copper wires discharged from the drainage screens 17 and 18 is discharged from the bottom of the heavy liquid separator 16 and the heavy liquid 13 from the heavy liquid separation screen 36 through the tank 36a. It is sent to the magnetic separator 19 together with the discharged wastewater on the dilution side. In the magnetic separator 19, only the magnetic powder contained in the waste water is adsorbed and separated, and then the magnetic powder is removed by the demagnetizer 2.
It is demagnetized by 2 and supplied into the heavy liquid tank 24. The heavy liquid tank 24 directly receives the heavy liquid wastewater discharged from the tank 36a.

The heavy liquid 13 in the heavy liquid tank 24 is a concentration meter 5
4, a high-concentration heavy liquid is supplied from the heavy tank 53 so that the specific gravity becomes 2.5, the specific gravity is adjusted, and thereafter, the heavy liquid is pumped by the heavy liquid pump 52 into the heavy liquid sorter 16 for circulation use. To be done. On the other hand, the waste water of the magnetic separator 19 from which the magnetic powder has been removed is temporarily stored in the water tank 21. As a result, impurities such as copper wires sink to the bottom of the water tank 21,
The settled impurities are scraped up by the discharge conveyor 20 and collected in the dust box 51 from the discharge part of the water tank 21. Then, only the supernatant water of the water tank 21 is pumped to the draining sieves 17 and 18 side by the water supply pump 50 and is circulated and used.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and any modification of the design without departing from the scope of the invention is included in the present invention. For example, a wetting agent (for example, WA-20 # manufactured by Nippon Perfume Co., Ltd.) is added to the used water taken out from the water washing container, and then impurities are removed by, for example, precipitation or filtration, and the water is circulated and used. You can also Further, in the examples, the amount of water in the water washing container was set to approximately 20 times the amount of the processing raw material, but it is not limited to this and may be 20 times or more the processing raw material.

[0020]

As is apparent from the above description, in the pretreatment method for heavy liquid sorting according to claims 1 and 2, the treatment liquid is preliminarily subjected to effective cleaning in a water washing container, and therefore, Almost no dust or oil adheres to the processing raw material fed into the sorter, which prevents bubbles from forming on the liquid surface of the heavy liquid during heavy liquid sorting, making the processing raw material efficient and lightweight. You can select Further, a water blowing portion is provided in an intermediate portion of the water washing container, and the water above the water blowing portion has an upward flow, so that in addition to washing the processing raw material,
Since the separated oil and dust are positively floated and separated, more efficient cleaning is possible. In particular, claim 2
In the described heavy liquid sorting pretreatment method, since the amount of water in the water washing container is 20 times or more the weight of the treatment raw material and a large amount of water is used for washing, a sufficient water washing effect can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view of a main part of a heavy liquid sorting facility to which a heavy liquid sorting pretreatment method according to an embodiment of the present invention is applied.

FIG. 2 is an overall schematic view of a heavy liquid sorting facility to which the heavy liquid sorting method is applied.

[Explanation of symbols]

10 Heavy Liquid Sorting Equipment 11 Long Sorting Machine 12 Water Washing Machine 13 Heavy Liquid 14 Lightweight 15 Heavy Weight 16 Heavy Liquid Sorting Machine 17 Draining Sieve 18 Draining Sieve 19 Magnetic Separator 20 Discharge Conveyor 21 Water Tank 22 Demagnetizer 24 Heavy Liquid Tank 25 Carrying-in device 26 Sorting device 27 Small-sized collection box 28 Large-sized collection box 29 Long-sized collection box 30 Rinsing container 30a Raw material input part 30b Raw material discharging part 30c Dust discharging part 30A Circulating water tank 30B Pump 30C Dust box 31 Discharging conveyor 32 Water blowing part 33 Sorting Container 33a Raw material charging part 33b Heavy material discharging part 33c Light material discharging part 34 Discharging part 35 Discharging conveyor 36 Heavy liquid separating sieve 36a Tank 37 Light material hopper 38 Heavy material hopper 39 Feeder 40 Magnetic separator 41 Sorting conveyor 42 Iron recovery box 43 Feeder 44 Non-ferrous sorting 45 fractionator 46 aluminum collection box 47 dust collecting box 48 of copper zinc recovery box 49 stainless recovery box 50 feed water pump 51 the dust box 52 duplex pump 53 Heavy tank 54 densitometer

Claims (2)

(57) [Claims] 1. When performing a heavy liquid sorting in which a processing raw material is put into a sorting container in which a heavy liquid is stored, and the processing raw material is sorted into a lightweight material that floats due to a difference in specific gravity and a heavy material that sediments, In advance, the processing raw material to be charged into the sorting container is charged into a washing container in which a water blowing part is provided in an intermediate part and an upper part has a rising water flow from the water blowing part, and the processing flow introduced by the rising water flow. A method for pretreatment of heavy liquid sorting, which comprises cleaning dust and oil attached to a raw material and positively floating and removing the dust and oil. 2. The pretreatment method for heavy liquid sorting according to claim 1, wherein the amount of water in the water washing container is 20 times or more the weight of the treatment raw material.