KR100993715B1 - Sampling method and sampling facilities - Google Patents

Abstract

An object of the present invention is to provide a sampling method and a sampling facility for efficiently sampling a sample for analysis of recycled raw materials containing Cu, Au, Ag, Pt, and Pd used for copper smelting.

In the sampling method for taking a sample for analysis of recycled raw materials used for copper smelting, (A) The non-crushed recycled raw materials are coarsely pulverized about 50 mm by a primary crusher to form a primary crushed product. (B) The primary crushed product obtained in the step (A) is crushed to a size of 40 mm or less by the secondary crusher to form a secondary crushed product, (C) the crushed secondary crushed product obtained in the step (B) is sieved, Secondary shredders larger than 30 mm are returned to the above process (B) and ground again, and the shredders having a size of 30 mm or less are taken as samples.

Hopper, single axis grinder, twin axis grinder, conveying belt conveyor, vibrating sieve

Description

Sampling Method and Sampling Facility {SAMPLING METHOD AND SAMPLING FACILITIES}

The present invention relates to a sampling method and a sampling facility for taking a sample for analysis of recycled raw materials used for copper smelting.

In recent years, metal scraps generated during metal processing, plating, and electronic material processes, and parts taken out from used electronic devices are utilized as raw materials (recycled raw materials) such as copper smelting, thereby promoting effective utilization of resources and recovery of valuable metals. Is done.

In the smelting, such recycled raw materials are supplied directly to a furnace or converter (PS converter) by crushing or the like.

In the smelting process, since it is purchased for the purpose of recovering valuable metals, it is necessary to sample and sample all of the recycled raw materials that have been received, and to accurately analyze the content of valuable metals to be sold.

For example, Patent Document 1 discloses a sampling device capable of automatically sampling a recycled raw material in a recycled raw material processing device. This sampling apparatus will be described below with reference to Figs.

The sampling device 200 is provided in the recycle raw material processing device 100. The recycling raw material processing apparatus 100 includes a hopper 110 for receiving recycled raw material R, a primary cutting feeder 120, a first discharge conveyor 130, and a second discharge conveyor 140. have.

The primary cutting feeder 120 is equipped with a means for crushing a sample such as a multi screw (crusher) 121 installed in the hopper 110 and a cutting conveyor 122, and recycled raw material of 50 to 150 mm × 100 mm. Is transferred to the first discharge conveyor 130 by the transfer conveyor 122.

The sampling apparatus 200 is equipped with the secondary cutting feeder 150 which functions as a 1st collection part, and the sampling box 210 which functions as a 2nd collection part.

The secondary cut feeder 150 includes a recovery box 151 and a conveyance belt 153. The secondary cutting feeder 150 is movable in the arrow X direction in FIGS. 7 and 8 to receive the crushed recycled raw material R falling from the cutting conveyor 122 to the first discharge conveyor 130.

The recycled raw material R pulverized in this way is conveyed by the conveyance belt 153, and is sampled by the sampling apparatus 200. The sampling apparatus 200 is provided with the sampling box 210 which can move to the arrow Y direction in FIG. 8, and receives the recycled raw material R from the conveyance belt 153. As shown in FIG.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2003-106948

As described above, the sampling device 200 described in Patent Document 1 is configured to collect (sample) the recycled raw material pulverized to a predetermined size into the sampling box 210. In addition, the recycled raw material sampled by the sampling apparatus 200 is 50-150 mm x 100 mm in size as understood from the above.

The present inventors, in the analysis of recycled raw materials containing Cu, Au, Ag, Pt, Pd, especially in recycled raw materials such as printed substrates that have not yet been pulverized, if the sample dimensions are ground to a certain size, In addition, it was examined whether the analysis to accurately determine the content rate of valuables thereafter was possible. Moreover, the present inventors examined the grinding | pulverization method for obtaining the recycling raw material of such a dimension efficiently.

As a result of many research experiments, the inventors have found that recycled raw materials such as printed substrates, which are not yet pulverized, have a size of 30 mm or less (molecular size 30 × 30 mm) as an effective dimension for analysis to accurately grasp the content of valuables. Size through the sieve), preferably 20 mm or less, and in order to obtain such a recycled raw material, dividing the recycled raw material into two stages, that is, coarse grinding in the first grinding After that, it was found that performing secondary grinding to obtain a raw material of a predetermined size is important for efficient sampling.

This invention is based on the novel knowledge of these inventors.

That is, an object of the present invention is to provide a sampling method and a sampling facility for efficiently sampling a sample for analysis of recycled raw materials containing Cu, Au, Ag, Pt, and Pd used for copper smelting.

This object is achieved with a sampling method and a sampling facility according to the present invention. In summary, according to the first aspect of the present invention, in the sampling method for taking a sample for analysis of recycled raw materials used for copper smelting,

(A) The non-crushed recycled raw material is ground to a size of about 50 mm by a primary crusher to form a primary crushed product, and then,

(B) The primary crushed product obtained in the step (A) is crushed to a size of 30 mm or less by a secondary crusher to obtain a secondary crushed product,

(C) sifting the secondary shreds obtained in the step (B), the second shredders larger than 40 mm are returned to the step (B) to be crushed again, and the shreds having a size of 30 mm or less are taken as samples. A sampling method for taking a sample for analysis of a recycled raw material is provided.

According to the second aspect of the present invention, in the sampling facility for taking a sample for analysis of recycled raw materials used for copper smelting,

Hopper which accepts recycling raw material which is not crushed,

A primary crusher disposed adjacent to the hopper and for coarsely crushing the recycled raw material from the hopper into primary crushes having a size of about 50 mm;

A secondary crusher for pulverizing the primary crushed material into secondary crushed materials having a size of 40 mm or less;

A first conveying belt conveyor disposed between the primary crusher and the secondary crusher and for conveying the primary crushed material coarsely crushed by the primary crusher to the secondary crusher;

A sieve for separating the secondary crushed material into crushed material having a size of 30 mm or less and crushed material larger than 30 mm,

A second conveying belt conveyor disposed between the secondary crusher and the sieve and for conveying the secondary crushed material pulverized by the secondary crusher to the sieve;

A third conveying belt for conveying the crushed matter to the first conveying belt conveyor for returning the crushed matter larger than 30 mm disposed between the sieve and the first conveying belt conveyor to the secondary crusher With conveyor,

A sampling facility is provided, having a sampling device for taking as a sample secondary crushed matter having a size of 30 mm or less separated by the sieve.

According to one embodiment of the present invention, the primary crusher is a twin screw mill, and the secondary crusher is a single screw mill.

According to another embodiment of the invention, the sieve is a vibrating body.

According to another embodiment of the present invention, the recycle raw material includes at least one of a printed board, gold and silver ash, an electric component chip, and a plating chip.

According to another embodiment of the invention, the sampling device,

A conveyance belt disposed below the vibrating body and receiving a crushed object having a size of 30 mm or less separated by the vibrating body;

It has a sampling box which takes in the crushed material grind | pulverized to 30 mm or less conveyed from the said conveyance belt, and collects it as a sample.

According to the present invention, recycled raw materials such as printed substrates containing Cu, Au, Ag, Pt, and Pd, for example, which have not yet been pulverized, used for copper smelting can be efficiently and effectively dimensioned for analysis. It can be ground and taken as a sample.

(First embodiment)

Hereinafter, a sampling method according to the present invention, that is, a sampling method of a sample for analysis of recycled raw materials containing Cu, Au, Ag, Pt, and Pd used for copper smelting, and a sampling facility, will be described in more detail with reference to the drawings. Explain.

1 is a flowchart showing a schematic configuration of an embodiment of a sampling method according to the present invention.

First, the sampling method of this embodiment will be described with reference to FIG.

According to the sampling method of this embodiment, a recycling raw material, such as a printed circuit board carried out by a flexible container bag or the like, for example, taken out from a used electronic device or the like, is primary by a hoist. It charges into a crusher, and it grind | pulverizes in the magnitude | size of about 50 mm (namely, 10 mm-100 mm) with a primary crusher (coarse grinding) (step (A)).

In this specification (and claims), the "size" of a crushed object shall mean the size through which the crushed object passes through a sieve having a predetermined mesh size. For example, 50 mm in size of a crushed object means the size through which a crushed material passes the sieve of 50 * 50 mm of mesh size.

As the primary crusher, a twin screw mill is suitably used. This is because the breaking force is large and the blade is strong.

As a twin-screw type grinder, "Model KT42H (brand name)" (processing capacity 5T / H) by the Kubota Co., Ltd. can be used, for example.

Subsequently, the coarsely crushed primary crushed material is pulverized to a size of 40 mm or less by a secondary crusher to become a secondary crushed product (step (B)). The reason for the size of the secondary crushed product to be 40 mm or less is that, in order to reduce the size at one time, equipment failure and screen clogging occur, and the crushing speed decreases, resulting in inefficiency.

As the secondary crusher, a single screw mill is suitably used. This is because it is suitable for making the size of a crushed object constant, and the repeated crushing which uses a screen together is easy.

As a single-axis grinder, "Model MR7 / 32SVC multi-rotor (brand name)" (processing capacity 5T / H) made from Earth Technologies, Inc. can be used, for example. This single screw type mill is equipped with the screen (sieve) whose mesh size is 40 * 40 mm, and can obtain the secondary shredding material of 40 mm or less. Shreds larger than 40 mm are returned to the secondary shredder and pulverized again.

In addition, the secondary crushed by the secondary crusher is filtered through a screen (sieve) having a mesh size of 30 mm x 30 mm (step (C)), so that the size is 30 mm or less, preferably 20 mm or less. The debris is taken as a sample by a sampling device. Secondary shredders larger than 30 mm are returned to the second shredder and pulverized (step (D)). Thereby, the crushed material whose size is 30 mm or less can be efficiently taken as an analysis sampling. The size of the crushed material collected as an analytical sample is 30 mm or less, in detail, as shown in the experimental results described later, the variation in the analytical value of the crushed particle size of 50 mm (50 x 50 mm) is reduced in Cu. The variation of the analytical value of 30 mm (30 x 30 mm) in the crushing particle size was about 9% and about 13% in Au because the variation was greatly improved to 5% in Cu and 7% in Au.

As the sieve, a vibrating body is suitably used. As the vibrating body, for example, " call type 3 * 8, single-phase type, ML type (trade name) "

Secondary shredded material having a shredding dimension of 30 mm or less separated by the vibrating body is fed to a sampling facility equipped with a sampling device such as the sampling device 200 described above with reference to FIGS. 7 and 8, and a sample for analysis is collected. [Process (E)].

Fig. 2 shows the variation of the analysis value for each particle size of recycled raw materials obtained by the experiments performed by the present inventors.

In this experiment, the sample (sample for analysis) was prepared by the method shown in FIG. 3 and FIG. In this experiment, a mixture of a printed circuit board and an IC chip was used as a recycling raw material.

The analytical sample (primary sample) sampled from the recycled raw material by the automatic sampling device is axially divided (minimized) by manual labor, and a predetermined amount thereof is melted together with iron sulfide to achieve uniformity. The mat is prepared to prepare a sample. This will be described again with reference to FIGS. 3 and 4.

In this experiment, first, as shown in Fig. 3, about 9 kg of an analytical sample (primary sample) having a size of 50 mm or less sampled by an automatic sampling device was condensed (mixed condensation) by an increment method to obtain a size of 50. About 500 g of samples (sample 1, sample 2) of mm or less were obtained.

8 kg of the remaining samples were crushed and crushed at an axial fraction ratio 1/4 by a crusher (crusher manufactured by Yoshida Seisakusho) to obtain a sample (Sample 3, Sample 4) having a size of 10 mm or less.

The remaining 7 kg of the sample was crushed again by a crusher (Letter crusher) to obtain a sample of about 500 g (sample 5, sample 6) having a size of 2 mm or less.

The sample thus obtained is precisely weighed again with an electronic balance as shown in FIG. 4, and the sample and iron sulfide are added to the graphite crucible by an automatic combination apparatus, and then, in a borosilicate melting furnace (1300 ° C). It melted and produced the mat.

The mat thus produced was taken out to a grain size of 10 mm or less with a jaw crusher after taking out. The matted analytical sample having a crushed particle size of 10 mm or less was further pulverized with a crushed particle size of 3 mm or less and had an axial fraction ratio of 1/10. Pulverization was carried out to obtain 180 g of analytical samples.

The result obtained by performing ICP analysis using the sample obtained in this way, and having calculated | required the fluctuation | variation of the analysis value for each crushing particle size is shown in FIG.

From Fig. 2, it can be seen that recycled raw materials such as a printed board have a dimension effective for ICP analysis of 30 mm or less. In particular, it turns out that the size of 20 mm or less is effective for an analysis.

In addition, the present inventors have conducted several experiments that the so-called two-step grinding method according to the present invention can efficiently collect a crushed product having a size of 20 mm or less as a sample as described above. Proven.

As a result, the recycling raw material is divided into two stages, that is, coarsely pulverized by primary crushing (crushing by a primary crusher), and then secondary crushing (secondary) to obtain a raw material of a predetermined size. Crushing by a crusher is important for efficient sampling, i.e., coarsely crushed to about 50 mm by the primary crusher, and then pulverized to 40 mm or less by the secondary crusher, thereby efficiently It has been found that secondary crushed products of 30 mm or less can be obtained.

In the above description, a printed circuit board is used as the recycling raw material. However, in some cases, gold may be used as an ash, an electrical component chip such as an IC chip, or a plating chip. Moreover, as shown also in the said experiment example, these may be mixed. That is, what recycled at least any one of these is used as a recycling raw material.

According to the sampling method of the present invention, it is possible to efficiently and efficiently analyze recycled raw materials such as printed substrates containing Cu, Au, Ag, Pt, Pd, which have not yet been pulverized, used for copper smelting. It can be pulverized to a dimension and taken as a sample.

(2nd Example)

5 shows an embodiment of a sampling facility for carrying out the sampling method of the present invention.

According to this embodiment, the sampling installation 1 is equipped with the hopper 2 which receives the recycling raw material which has not yet been crushed, such as a printed circuit board thrown in by a hoist crane. Adjacent to the hopper 2 is a primary crusher 3, which is a twin screw mill.

The sampling facility 1 further includes a secondary crusher 4 serving as a uniaxial grinder, and a first conveyer belt conveyor 5 is disposed between the primary crusher 3 and the secondary crusher 4. . Therefore, the primary crushed material crushed by the primary crusher 3 is conveyed to the secondary crusher 4 via the hopper 6 by the first conveyance belt conveyor 5.

The uniaxial grinder which is the secondary crusher 4 is equipped with the screen (sieve) of mesh size 40 * 40 mm, and can obtain the secondary crushed material of 40 mm or less size.

The shredder larger than 40 mm pulverized by the secondary crusher 4 is pulverized until it is circulated in the secondary crusher and becomes 40 mm or less.

That is, it is conveyed to a vibrating body through a 40 mm screen, and it returns to a secondary crusher and grinds.

The secondary crushed material crushed to a size of 40 mm or less by the secondary crusher 4 is a vibrating screen (sieve) disposed by the second conveying belt conveyor 7 adjacent to the primary crusher 3. Returned to (8).

Moreover, the 3rd conveyance belt conveyor 9 is arrange | positioned between the vibrating body 8 and the 1st conveyance belt conveyor 5. Therefore, the crushed object larger than 30 mm separated by the vibrating body 8 having a screen (sieve) having a mesh diameter of 30 mm is transferred to the first conveying belt conveyor 5 by the third conveying belt conveyor 9. do. Therefore, the crushed object larger than 20 mm separated by this vibrating body 8 is conveyed to the secondary crusher 4, and is crushed again by the secondary crusher 4.

Below the vibrating body 8, the sampling apparatus 20 which receives the secondary shredding material of the shredding dimension separated by the vibrating body 8 or less of 30 mm is provided.

Although the sampling device 20 can have any configuration, in this embodiment, the sampling device 20 has the same configuration as the sampling device 200 described above with reference to FIGS. 7 and 8.

That is, the sampling device 20 includes the hopper 110 and the primary cutting feeder 120 below the vibrating body 8, and separates the crushed matter having a size of 30 mm or less separated by the vibrating body 8. Receive.

The sampling apparatus 20 corresponds to the conveyor 21 corresponding to the secondary cut feeder 150 which makes it possible to move in the arrow X direction in FIG. 7, and the sampling box 210 which can be moved in the arrow Y direction in FIG. The sample box 22 is provided, and the recycling raw material R comminuted to 30 mm or less conveyed from the cutting belt 21 is received, and it collects as a sample. Sampling takes 1/10 of the total amount, and then takes 1/10 of it (finally 1% of the total).

In the said Example, the recycle raw material R was demonstrated as using the recycle raw material which is not comminuted. However, if the recycled raw material is already pulverized, the recycled raw material as shown in Figs. 1 and 5 may be introduced into the secondary crusher 4 directly through the hopper 6 by a hoist. have.

In addition, in the present Example shown in FIG. 5, the automatic sampling installation becomes a structure provided with the sampling installation 1A which uses the recycled raw material grind | pulverized other than the sampling installation 1 mentioned above.

1 A of sampling facilities are used when a recycling raw material turns into what is called a grain raw material of 30 mm or less.

1 A of sampling facilities are equipped with the granule raw material accommodation hopper 301, the apron feeder 302, the input belt conveyor 303, and the sampling apparatus 20A.

In the sampling facility 1A, as understood with reference to FIG. 6, the grain raw material is injected into the grain raw material accommodation hopper 301 by shovel. The grain raw material is transferred from the hopper 301 to the apron feeder 302 and further conveyed to the sampling device 20A by the feeding belt conveyor 303. The sampling device 20A has the same configuration as the sampling device 200 described above with reference to FIGS. 7 and 8, that is, the sampling device 20.

That is, 20 A of sampling apparatuses are located below the edge part of the input belt conveyor 303, and are provided with the conveyance belt 21 corresponded to the conveyance belt 153, and the conveyance belt 21 is 30 mm or less. Receives the grain raw material of the size of.

20A of sampling apparatuses are equipped with the sampling box 22 corresponded to the sampling box 210 which can be moved to the arrow Y direction in FIG. 8, and is 30 mm or less recycled raw material conveyed from the conveyance belt 21. Received and collected as a sample. Sampling takes 1/10 of the total amount, and then takes 1/10 of it (finally 1% of the total).

According to the sampling facility of the present invention, for the purpose of efficiently and efficiently analyzing recycled raw materials such as printed wiring boards containing Cu, Au, Ag, Pt, Pd, which have not yet been pulverized, used for copper smelting It may be ground to effective dimensions and taken as a sample.

1 is a flowchart showing a schematic configuration of an embodiment of a sampling method according to the present invention;

2 is a graph showing the results of obtaining the variation of the analysis value for each crushing particle size;

Fig. 3 is a flowchart for explaining a method of preparing a sample (analysis sample) used in an experiment for determining variation in analysis value for each crushing particle size.

Fig. 4 is a flowchart for explaining a method of preparing a sample (analysis sample) used in an experiment for determining variation in analysis value for each crushing particle size.

Fig. 5 is a schematic configuration diagram of a sampling facility for carrying out the sampling method according to the present invention.

6 is a flowchart for explaining an operation aspect of a sampling facility.

7 is a schematic side view of a conventional sampling facility.

8 is a schematic configuration plan view of a conventional sampling facility.

<Explanation of symbols for main parts of the drawings>

1, 1A: Sampling Facility

2: recycling raw material hopper

3: 2-axis grinder (primary crusher)

4: Single Axis Grinder (Secondary Crusher)

5: first conveying belt conveyor

7: second conveying belt conveyor

8: vibrating body

9: 3rd conveying belt conveyor

20, 20A, 200: sampling device

21, 21A, 153: conveying belt

22, 22A, 210: sampling box

Claims (9)

In the sampling method for taking a sample for analysis of recycled raw materials used for copper smelting, (A) The uncrushed recycled raw material taken out of the used electronic device is coarsely pulverized by a primary crusher having a twin-shaft pulverizer without a sieve to form a primary crushed product. (B) The primary crushed product obtained in the step (A) is crushed to a size of 40 mm or less by a secondary crusher having a uniaxial crusher equipped with a sieve to be a secondary crushed product, (C) The secondary shredder obtained in the step (B) is filtered through a second sieve provided below the sieve, and the secondary shredder larger than 30 mm is returned to the step (B) to be crushed again, and the size is 30 mm. A sampling method for collecting a sample for analysis of a recycled raw material, characterized in that the following crushed product is taken as a sample. The sampling method according to claim 1, wherein the second sieve is a vibrating body. The sample for analysis of recycled raw materials according to claim 1 or 2, wherein the recycled raw material comprises at least one of a printed board, gold and silver ash, an electric component chip, and a plating chip. Sampling method to collect. In the sampling facility for taking a sample for analysis of recycled raw materials used for copper smelting, A hopper for receiving uncrushed recycled raw materials taken out of the used electronic equipment; A primary crusher having a twin-screw crusher disposed adjacent to the hopper and not provided with a sieve for coarsely pulverizing recycle raw materials from the hopper into primary crushed materials; A secondary crusher having a uniaxial crusher with a sieve for pulverizing the primary crushed material into secondary crushed material having a size of 40 mm or less; A first conveying belt conveyor disposed between the primary crusher and the secondary crusher and for conveying the primary crushed material coarsely crushed by the primary crusher to the secondary crusher; A second sieve separating the secondary crushed material into crushed material having a size of 30 mm or less and crushed material larger than 30 mm, A second conveying belt conveyor disposed between the secondary crusher and the second sieve and for conveying the secondary crushed material pulverized by the secondary crusher to the second sieve; Transferring the shredded material to the first conveyed belt conveyor to return the shredder larger than 30 mm disposed between the second sieve and the first conveyed belt conveyor to the secondary shredder. Third conveying belt conveyor for And a sampling device for collecting as a sample a secondary crushed material having a size of 30 mm or less separated by the second sieve. 5. The sampling installation according to claim 4, wherein the second sieve is a vibrating body. The sampling apparatus according to claim 4 or 5, wherein the recycled raw material includes at least one of a printed board, gold and silver ash, an electric component chip, and a plating chip. The method of claim 4 or 5, wherein the sampling device, A conveyance belt disposed below the second sieve and receiving a crush having a size of 30 mm or less separated by the second sieve; And a sampling box which receives a crushed object pulverized to 30 mm or less and is collected as a sample from the conveyance belt. delete delete

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