JP5509834B2 - Recycling raw material processing method - Google Patents

Description

  The present invention relates to a method for processing a recycled material for introducing a recycled material containing valuable materials such as noble metals such as gold, silver, and copper into a melting processing facility and subjecting it to a melting process.

Electronic substrates, flexible substrates, and the like used for electronic devices contain valuable metals such as gold, silver, copper, and palladium. Moreover, silver is contained in photographic film, movie film, photographic paper, and the like.
Therefore, it has been proposed to reuse these electronic substrates, flexible substrates, films, photographic papers, and other wastes as recycled materials. For example, the above-mentioned waste is burned in a melting treatment facility such as a rotary kiln furnace to form combustion ash, and this combustion ash is put into a copper smelting furnace and the like, and the above-mentioned valuable metals are recovered in the process of copper smelting. ing.

Here, recycled materials such as flexible substrates, photographic films, movie films, and photographic papers have a low bulk specific gravity, so the work of charging them into a melting processing facility such as a rotary kiln furnace becomes complicated, and the melting processing is performed efficiently. There was a problem that it was impossible.
Therefore, for example, as shown in Patent Documents 1-4, a method has been proposed in which a recycled raw material having a small bulk specific gravity is subjected to volume reduction treatment and then introduced into a melting treatment facility such as a rotary kiln furnace.

Japanese Patent Laying-Open No. 2005-074260 Japanese Patent Application Laid-Open No. 09-024360 Japanese Unexamined Patent Publication No. 07-150158 JP 09-234449 A

  By the way, when volume reduction processing is performed as disclosed in Patent Documents 1-4, it becomes easy to put into a rotary kiln furnace, and the efficiency of melting processing is greatly improved. However, in the recycled raw material (volume-reduced product) that has undergone volume reduction treatment, combustion and melting are insufficient in the rotary kiln furnace, and valuable metal is absorbed in the slag generated in the rotary kiln furnace. There was a problem that the recovery rate decreased.

  The present invention has been made in view of the above-described situation, and can efficiently recycle a recycled material having a small bulk specific gravity, such as a flexible substrate, a photographic film, a movie film, an X-ray film, and a photographic paper. An object of the present invention is to provide a method for treating a recycled raw material that can improve the recovery rate of valuable metals.

In order to solve this problem, a method for processing a recycled material according to the present invention is a method for processing a recycled material for charging the recycled material into a melting treatment facility and performing a melting treatment, wherein the recycled material contains a metal-containing material. A volume reduction process step for obtaining a volume reduction treatment product by reducing the volume of the recycled material, and a melting treatment step for injecting the volume reduction treatment product into the melting treatment facility and burning and melting the film and a flexible substrate ; In the volume reduction treatment step, a heating step of heating and softening the recycled raw material, and an extrusion molding step of pressing the softened recycled raw material from one end side of a molding hole to form a molded body, A cutting step of cutting the molded body discharged from the other end of the molding hole with a cutting blade, and pouring water in the extrusion molding step. Is configured to control the specific gravity of the volume reduction treatment product, in the molded hole is the ratio D / L of the diameter D and length L is 0.2 to 0.4, the volume reduction treatment In the step, the specific volume of the volume-reduced product is 0.1 or more and 0.4 or less, and the particle size of the volume-reduced product is 50 mm or less .

  In the processing method of the recycled raw material having this configuration, the specific gravity of the volume-reduced product is 0.1 or more in the volume reduction processing step of reducing the volume of the recycled raw material to obtain the volume-reduced product. The raw material can be put into the melt processing facility relatively easily, and the processing efficiency can be improved. On the other hand, in the volume reduction treatment step, the specific gravity of the volume reduction treatment product is set to 0.4 or less, so that the volume reduction treatment product introduced into the melting treatment facility can be reliably burned and melted, and valuable in the slag. By preventing the metal from being absorbed, the recovery rate of valuable metals can be greatly improved.

In the volume reduction process, the particle size of the volume reduction processed product is 50 mm or less, so that the volume reduction processed product put into the melting processing facility can be reliably burned and melted, and valuable metals are contained in the slag. It can be prevented from being absorbed.

Further, in the volume reduction treatment step, a heating step for heating and softening the recycled raw material, an extrusion molding step for molding the molded body by pushing the softened recycled raw material from one end side of a molding hole, and the molding A cutting step of cutting the molded body discharged from the other end of the hole with a cutting blade, and controlling the specific gravity of the volume-reduced product by pouring water in the extrusion molding step. The ratio D / L between the diameter D and the length L is 0.2 or more and 0.4 or less.

  In this case, by pouring water near the molding hole, the pressure in the vicinity of the molding hole into which the softened recycled material is pushed in changes, and the filling rate of the recycled material into the molding hole is adjusted. It becomes possible to control the specific gravity of the processed material. Moreover, since the hardness of the molded object discharged | emitted from a shaping | molding hole falls, the parting process by a cutting blade can be performed favorably, and the particle size of a volume reduction processed material is restrained small. In addition, it is possible to prevent the filling rate of the forming holes from becoming higher than necessary, and further to prevent seizure, so that the formation of clogging of the forming holes can be suppressed, and the volume reduction treatment can be performed smoothly. Can do.

Moreover, it is preferable to provide the crushing process which crushes the said recycling raw material, or the crushing material transport process in the front | former stage of the said volume reduction process process.
In this case, since the crushed material finely crushed is reduced by the crushing step or the crushed material transporting step, the volume reduction treatment can be performed efficiently.

Furthermore, it is preferable that the melting treatment facility is a rotary kiln furnace.
In this case, by performing combustion / melting treatment in a rotary kiln furnace in which the furnace main body is driven to rotate, it is possible to reliably burn / melt the injected volume-reduced product, and to improve the recovery rate of valuable metals. .

Moreover, it is preferable that the said recycling raw material contains a metal containing paper further .
Further, the volume-reduced product may be mixed with shredder dust and printed boards, glass, and sludge and then charged into the melting processing facility.

In addition, a reduction process for reducing the crushed material of the recycled material is provided before the volume reduction process, and in the volume reduction process, the crushed material discharged in the reduction process is reduced. It is good also as a structure which performs the said volume reduction process.
In this case, it is possible to collect samples for evaluation from recycled materials through the reduction process, and to reduce the volume of recycled materials other than the samples for evaluation. It can be carried out.

  According to the present invention, a recycled material having a small bulk specific gravity such as a flexible substrate, a photographic film, a movie film, an X-ray film, and a photographic paper can be efficiently melted, and the recovery rate of valuable metals can be improved. The processing method of the recycling raw material which can be made can be provided.

It is a schematic explanatory drawing of the processing apparatus of the recycling raw material which enforces the processing method of the recycling raw material which is embodiment of this invention. It is a schematic diagram of the volume reduction machine with which the processing apparatus of the recycling raw material shown in FIG. FIG. 3 is a view as viewed in the X direction in FIG. 2. It is a flowchart which shows the processing method of the recycling raw material which is embodiment of this invention. It is a flowchart of the volume reduction process process implemented in the processing method of a recycling raw material.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Examples of the recycled material to be processed in the method for processing a recycled material according to this embodiment include a flexible substrate, a film, and photographic paper. These recycled raw materials contain valuable metals such as gold, silver, and copper, and have a low bulk specific gravity and are difficult to handle.

First, a recycled material processing apparatus for carrying out a recycled material processing method according to an embodiment of the present invention will be described with reference to FIG.
A recycling raw material processing apparatus 10 shown in FIG. 1 is a facility for performing a pretreatment before charging the recycled raw material into a melting processing facility such as a rotary kiln furnace, and collects an evaluation sample from the recycled raw material and also an evaluation sample. The volume of recycled materials other than those is reduced.

  The recycling raw material processing apparatus 10 includes a crusher 20 that crushes recycled raw materials, a first belt conveyor 11 and a second belt conveyor 12 that transfer crushed materials, and a primary storage tank 30 that stores crushed materials of recycled raw materials. And a third belt conveyor 13 for transferring the crushed material supplied from the primary storage tank 30, a primary reducer 41 for reducing the transferred crushed material, and a pulverizer for pulverizing the reduced crushed material. 43, a fourth belt conveyor 14 for transferring the pulverized product generated by the pulverizer 43, a secondary storage tank 45 for storing the pulverized product, and a pulverized product supplied from the secondary storage tank 45. And a sample recovery unit 49 that recovers the reduced pulverized product (evaluation sample). Moreover, in this embodiment, the crushed material supply part 51 which supplies the crushed material of the recycled raw material crushed outside is provided above the 1st belt conveyor 11. As shown in FIG.

  And the 6th belt conveyor 16 which collects the crushed material discharged | emitted from the primary reducer 41, and the pulverized material discharged | emitted from the secondary reducer 47, The storage tank 55 which stores the collect | recovered crushed material and crushed material, The volume reduction machine 60 that reduces the volume of the crushed material and the pulverized material supplied from the storage tank 55, the belt conveyor 58 that transfers the volume reduction processed material reduced by the volume reduction machine 60, and the volume reduction processing. A volume reduction yard 59 for stocking goods is provided.

Here, the primary reducer 41 is a so-called cut bucket type reducer, in which buckets arranged at regular intervals are moved at a constant speed, and crushed material falling into the bucket is pulverized. The crushed material that has been supplied to 43 and dropped out of the bucket is collected by the sixth belt conveyor 16.
Similarly to the primary reducer 41, the secondary reducer 47 is a cut bucket type reducer, and buckets arranged at regular intervals are moved at a constant speed and dropped into the bucket. The pulverized material is transferred to the sample collection unit 49 as an evaluation sample, and the pulverized material dropped outside the bucket is collected by the sixth belt conveyor 16.

As shown in FIG. 2, the volume reducer 60 includes a raw material storage chamber 62 provided with a raw material input port 61, and a partition disposed at the other end (left side in FIG. 2) of the raw material storage chamber 62. A plate 65 and a cutting machine 67 disposed on the other end side of the partition plate 65 are provided.
The raw material storage chamber 62 is provided with a heater 63 that heats the recycled material that has been input, and a screw conveyor 64 that conveys the recycled material to the partition plate 65 side. The raw material storage chamber 62 is provided with a water injector 70 for injecting water toward the partition plate 65.

Further, as shown in FIGS. 2 and 3, the partition plate 65 is formed with a plurality of forming holes 66 penetrating in the thickness direction. Here, the forming hole 66 has a circular cross section, and the inner diameter thereof is set to 30 mm or more and 50 mm or less. Further, the thickness of the partition plate 65, that is, the length of the forming hole 66 is set to 150 mm or more and 180 mm or less.
The cutting machine 67 includes a rotation drive shaft 68 and a cutting blade 69 rotated by the rotation drive shaft 68.
Here, in this embodiment, the ratio D / L of the diameter D and the length L of the forming hole 66 is set to 0.2 or more and 0.4 or less. Moreover, this shaping | molding hole 66 is comprised with antirust materials, such as SUS material, for example.

Next, a recycled material processing method using the above-described recycled material processing apparatus 10 will be described with reference to the flowcharts shown in FIGS. 4 and 5.
In this recycled material processing method, a crushing step S1 for crushing the recycled material by the crusher 20 to generate a crushed material, a primary mixing step S2 for storing the crushed material and stirring and mixing the stored crushed material, The primary reduction step S3 for reducing the agglomerated crushed material, the pulverization step S4 for crushing the crushed crushed material, and the secondary for agitation and mixing the pulverized material stored while storing the pulverized material A mixing step S5 and a secondary reduction step S6 for reducing the agitated and mixed pulverized product are provided.

  And the collection process S11 which collects the crushed material discharged out of the bucket in the primary reduction process S3 and the pulverized material discharged out of the bucket in the secondary reduction process S6 by the sixth belt conveyor 16, and the recovery Storage step S12 for storing the crushed material and the pulverized material in the storage tank 55, and a volume reduction processing step for obtaining a volume reduction processed product by reducing the volume of the crushed material and the pulverized material supplied from the storage tank 55 with the volume reduction device 60. S13, and a dissolution treatment step S14 in which the volume-reduced product is put into a rotary kiln furnace for dissolution treatment.

In the pulverization step S1, the recycled raw material is crushed by the crusher 20, and a crushed product of 50 mm × 50 mm or less is produced. The crushed material produced by the crusher 20 is transferred to the primary storage tank 30 via the first belt conveyor 11 and the second belt conveyor 12.
In the primary mixing step S2, the crushed material stored in the primary storage tank 30 is stirred and mixed with a stirrer. Further, the crushed material is supplied to the primary reducer 41 by a fixed amount by a fixed amount feeder.

  In the primary reduction step S3, about 10% of the total amount of the crushed material falls into the bucket and is transferred to the pulverizer 43 by the cut bucket type primary reduction device 41. Further, about 90% of the total amount of crushed material falls outside the bucket.

In the pulverization step S4, the hammer block provided in the pulverizer 43 collides with the crushed material, and the crushed material of 20 mm × 20 mm or less is discharged. The pulverized product produced by the pulverizer 43 is transferred to the secondary storage tank 45 via the fourth belt conveyor 14.
In the secondary mixing step S5, the pulverized material stored in the secondary storage tank 45 is stirred and mixed with a stirrer. Further, the pulverized product is supplied to the secondary contractor 47 by a fixed amount by a fixed amount feeder.

  In the secondary reduction process S6, about 10% of the total amount of the pulverized material falls into the bucket by the cut bucket type secondary reduction machine 47 and is collected as an evaluation sample. Further, about 90% of the total amount of the pulverized material falls outside the bucket.

In this way, when the total amount of the recycled raw material is 100 kg, 10 kg of crushed material is obtained in the primary reduction step S3, and this 10 kg of crushed material is pulverized in the pulverization step S4, and in the secondary reduction step S6. 1 kg of pulverized material is collected as an evaluation sample.
In addition, 90 kg of crushed material is discharged in the primary reduction step S3, and 9 kg of pulverized material is discharged in the secondary reduction step S6.

In the recovery step S11, the crushed material and the pulverized material that have fallen out of the bucket in the primary reduction step S3 and the secondary reduction step S6 are recovered by the sixth belt conveyor 16.
In the storage step S <b> 12, the crushed material and the pulverized material collected by the sixth belt conveyor 16 are stored in the storage tank 55, and the crushed material and the pulverized material are transferred toward the subsequent volume reducer 60.

  In the volume reduction processing step S13, first, the crushed material and the pulverized material supplied from the storage tank 55 are charged from the raw material charging port 61 of the volume reducing machine 60 (raw material charging step S21). Then, the crushed material and the pulverized material are heated in the raw material storage chamber 62 by the heater 63 (heating step S22). In the present embodiment, the operating temperature of the volume reducer 60 in the heating step S22 is set to 90 ° C. or higher and 140 ° C. or lower.

  The heated and softened crushed material and pulverized material are conveyed to the partition plate 65 side by the screw conveyor 64, filled in the molding holes 66 provided in the partition plate 65, and formed into a molded body (extrusion molding). Step S23). At this time, water is injected from the water injector 70 into the partition plate 65. The molded body produced from the other end side of the molding hole 66 is cut by the cutting blade 69 of the cutting machine 67 (cutting step S24).

  Here, in the extrusion molding step S <b> 23, the specific gravity of the volume-reduced product to be produced is 0.1 or more and 0.00 when water is poured from the water injector 70 toward the partition plate 65 (in the vicinity of the molding hole 66). It is controlled to be 4 or less. Moreover, it is controlled so that the particle size of the volume-reduced product is 50 mm or less. The amount of water injection varies depending on the properties of the crushed material and pulverized material (recycled raw material), but ranges from 0.03 L / kg to 0.3 L / kg per kg of the crushed material and pulverized material (recycled raw material) input. It is preferable to be inside.

  In the melt treatment step S14, the volume-reduced product produced in the above-described volume-reduction process step S13 is charged into a rotary kiln furnace that is a melt treatment facility, and the volume-reduced product is melted inside the furnace body. It will be.

According to the recycling raw material processing method according to the embodiment of the present invention having the above-described configuration, in the volume reduction processing step S13 in which a volume reduction processing product is obtained by reducing the volume of the crushed and pulverized material of the recycling raw material. Since the specific gravity of the volume-reduced product to be obtained is set to 0.1 or more, a recycled material having a small bulk specific gravity can be introduced into the melting processing facility relatively easily, and the processing efficiency can be improved. On the other hand, in the volume reduction treatment step S13, since the specific gravity of the volume reduction treatment product is set to 0.4 or less, the volume reduction treatment product introduced into the rotary kiln furnace can be reliably burned and melted, and valuable metals are contained in the slag. Can be prevented, and the recovery rate of valuable metals can be greatly improved.
Furthermore, in this embodiment, since the particle size of the volume reduction treatment product is set to 50 mm or less in the volume reduction treatment step S13, the volume reduction treatment product charged into the rotary kiln furnace can be reliably burned and melted.

  Further, in the volume reduction processing step S13, a raw material charging step S21 in which the crushed material and pulverized material of the recycled raw material are charged into the raw material storage chamber 62 of the volume reduction machine 70, and the crushed material and pulverized material that has been charged are heated by the heater 63. Heating step S22 for softening by heating, and the softened crushed material and pulverized material are conveyed to the partition plate 65 side by the screw conveyor 64 and pushed into the molding holes 66 formed in the partition plate 65 to form a molded body. Since the molding step S23 and the cutting step S24 in which the molded body discharged from the other end of the molding hole 66 is cut by the cutting blade 69, the volume reduction processing of the recycled raw material can be performed efficiently.

  In the extrusion molding step S23, water is poured into the partition plate 65 by the water injection machine 70. Therefore, the pressure of the molding hole 66 portion into which the softened recycled material is pushed changes, and the recycled material molding hole 66 is used. As a result, the filling rate is adjusted, and the specific gravity of the volume-reduced product can be controlled. Moreover, since the hardness of the molded object discharged | emitted from the shaping | molding hole 66 falls, the parting process by the cutting blade 69 can be performed favorably, and the particle size of a volume reduction processed material is restrained small. Further, the filling rate of the recycled material into the molding holes 66 is prevented from becoming higher than necessary, and the occurrence of clogging of the molding holes 66 can be suppressed, and the volume reduction process can be performed smoothly.

Further, in the volume reduction processing step S13, the volume reduction device 60 reduces the crushed material of 50 mm × 50 mm or less crushed by the crusher 20 and the crushed material of 20 mm × 20 mm or less crushed by the crusher 43. Since it is set as the structure which processes, volume reduction processing can be performed efficiently.
Furthermore, in the melting treatment step S14, the volume reduction treatment is put into a rotary kiln furnace that is driven to rotate the furnace body, so that the inputted volume reduction treatment can be reliably burned and melted. The recovery rate of valuable metals can be improved.

  Samples for evaluation are collected in the primary reduction step S3 and the secondary reduction step S6, and the crushed and pulverized products discharged in the primary reduction step S3 and the secondary reduction step S6 are collected. Since the volume reduction process is performed, the recycling raw material sampling method and the volume reduction process can be performed consistently by the method of processing recycled material according to this embodiment.

Furthermore, in this embodiment, since the primary storage tank 30 which stirs and mixes the crushed material while storing the crushed material of the recycled material is provided, the primary shredder 41 obtains a uniform crushed material from the entire recycled material. be able to.
In addition, since the secondary storage tank 45 that stores the pulverized material and stirs and mixes the pulverized material is provided in the front stage of the secondary reducer 47, a uniform pulverized material (evaluation) is obtained from the entire recycled raw material in the secondary contractor 47. Sample) can be obtained.

Furthermore, in this embodiment, since the ratio D / L of the diameter D and the length L of the molding hole 66 is set to 0.2 or more, the blockage of the molding hole 66 can be suppressed. On the other hand, since the ratio D / L of the diameter D and the length L of the molding hole 66 is set to 0.4 or less, the volume reduction process is performed efficiently, and the specific gravity of the volume reduction processed product can be increased. it can.
Moreover, since this shaping | molding hole 66 is comprised with antirust materials, such as SUS material, generation | occurrence | production of the rust to the internal peripheral surface of the shaping | molding hole 66 is suppressed, and obstruction | occlusion of the shaping | molding hole 66 is prevented.

  Furthermore, in this embodiment, since the operating temperature of the volume reduction machine 60 in this heating process S22 is 90 degreeC or more, the crushed material and ground material supplied from the storage tank 55 are efficiently volume-reduced. can do. On the other hand, since the operating temperature of the volume reducer 60 in the heating step S22 is set to 140 ° C. or lower, sintering inside the molding hole 66 does not occur, and blockage of the molding hole 66 can be suppressed. The occurrence of energy loss due to excessive volume reduction can be suppressed.

As mentioned above, although the processing method of the recycling raw material which is embodiment of this invention was demonstrated, this invention is not limited to this, In the range which does not deviate from the technical idea of the invention, it can change suitably.
For example, the property of the recycled raw material to be processed is not limited to the embodiment, and can be applied to various properties. However, since flexible substrates, films, photographic papers, and the like have a low bulk specific gravity, they can be efficiently melted by being processed by the recycling raw material processing method according to this embodiment.

In addition, it has been described that the crushed and pulverized materials discharged in the primary and secondary reducers are collected and reduced in volume, but the present invention is not limited to this, and the volume of recycled raw materials is reduced as it is. It is good also as what is processed.
Furthermore, the configuration of the volume reducing machine is not limited to that exemplified in the present embodiment, and may be of other configurations.
In addition, although it was explained that the volume-reduced product was put into the rotary kiln furnace as it is, it is not limited to this, and the volume-reduced product was mixed with shredder dust, printed circuit boards, sludges, glass, etc. It is good also as a structure thrown into a rotary kiln furnace later.

  Furthermore, although the description has been made assuming that the molding hole of the volume reduction machine is made of SUS material, the present invention is not limited to this, and it may be made of other materials such as titanium, Cu, and SS material.

Next, the result of a confirmation experiment performed to confirm the effect of the present invention will be described.
[Example 1]
As a recycled material, a mixture of film, printed circuit board, and photographic paper was prepared. As Comparative Example 1, volume reduction treatment was performed without water injection using the volume reduction machine described in the embodiment. As Example 1 of the present invention, volume reduction treatment was performed while water was poured using the volume reduction machine described in the embodiment.
In Comparative Example 1 and Invention Example 1, the particle size, specific gravity, treatment amount, and the like of the volume-reduced product to be produced were evaluated. The evaluation results are shown in Table 1.

In Comparative Example 1 in which the volume reduction treatment was performed without water injection, the specific gravity of the volume reduction treatment product exceeded 0.4 and the particle size also exceeded 50 mm. The processing amount was 1 t per hour. Further, the molding hole was blocked during the volume reduction process, and the operation of the volume reduction machine was interrupted.
On the other hand, in Example 1 of the present invention in which volume reduction treatment was performed while pouring water, the specific gravity of the volume reduction treated product was 0.1 to 0.4 and the particle size was adjusted to 50 mm or less. It is presumed that the filling rate into the molding holes was reduced by the water injection, and the molded body was cut well. Further, the processing amount was 1.5 t per hour, and it was confirmed that the processing efficiency was improved as compared with Comparative Example 1. Furthermore, there was no blockage of the molding hole, and the volume reduction treatment could be performed satisfactorily.

[Example 2]
Next, the volume-reduced product and the recycle raw material with different particle diameters and specific gravity were put into a rotary kiln furnace, and the melt treatment status in the rotary kiln furnace was compared. The temperature of the rotary kiln furnace to be melted was set to 1000 to 1200 ° C., and the rotation speed of the furnace body was set to 0.3 rpm. Table 2 shows the results of evaluating the ashing status, slag loss, and throughput of recycled raw materials.

In Comparative Example 2 in which the particle size of the volume-reduced product exceeded 50 mm and the specific gravity exceeded 0.4, the volume-reduced product could not be completely burned and melted in the rotary kiln furnace, and ashing occurred. It was insufficient. In addition, slag loss occurred and the recovery rate of valuable metals decreased.
In Comparative Example 3 in which the recycled raw material was directly put into the rotary kiln furnace without carrying out the volume reduction treatment, the ashing condition was good and slag loss was not confirmed, but the bulk specific gravity was small and the charging work became difficult. , Throughput decreased.

  On the other hand, in Example 2-7 of the present invention in which the particle size of the volume-reduced product was 50 mm or less and the specific gravity was 0.1 or more and 0.4 or less, the ashing condition was good and no slag loss was confirmed. . Moreover, the processing amount was 7 t / day or more, and it was possible to efficiently melt the recycled raw material. In addition, regardless of the particle size of the volume-reduced product, a tendency was observed that the treatment capacity improved as the specific gravity decreased.

Example 3
Next, the ratio D / L between the diameter D and the length L of the molding hole of the volume reduction machine in the above-described embodiment and the operating temperature of the volume reduction machine were changed to confirm the volume reduction processing status. In addition, the film was used as a processed material. The evaluation results are shown in Table 3.

When the ratio D / L between the diameter D and the length L of the molding hole was 0.166 or less, the molding hole was blocked regardless of the presence or absence of water injection and the operating temperature.
When the ratio D / L between the diameter D and the length L of the molding hole was 0.188 or more, the molding hole was not blocked by water injection. On the other hand, when water injection was not performed, the molding hole was blocked and the load increased during extrusion.

Further, when the ratio D / L between the diameter D and the length L of the molding hole is 0.5, it is difficult to make the specific gravity of the volume-reduced product larger than 0.1.
Furthermore, when the ratio D / L between the diameter D and the length L of the molding hole is 0.2 and 0.4, the higher the operating temperature, the greater the specific gravity of the volume-reduced product, and the volume reduction. It was confirmed that the treatment can be performed efficiently.

Example 4
Next, the material of the molding hole portion of the volume reducing machine in the above-described embodiment was changed, and the blocking state of the molding hole during the volume reduction process was confirmed.
A flexible substrate was adopted as the processed material. The diameter D of the forming hole was 3 cm, the length L was 16 cm, and D / L = 0.188. The operation temperature was set to 120 ° C., and volume reduction treatment was performed using a partition plate having 33 molding holes.

When forming holes were made of SS material (general steel material), 3 out of 33 forming holes were blocked after 100 hours of operation. On the other hand, when the forming holes were made of SUS material (stainless steel), no blockage occurred in the 33 forming holes after 100 hours of operation.
This is considered to be because the formation of rust material on the inner peripheral surface of the molding hole suppresses the generation of rust and improves the smoothness of the molding hole.

66 Molding hole S13 Volume reduction process S14 Melting process S22 Heating process S23 Extrusion molding process S24 Cutting process

Claims (6)

A method of processing recycled raw materials for charging the molten raw materials into a melting processing facility and processing the molten raw materials,
The recycled material is a metal-containing film and a flexible substrate,
A volume reduction treatment step for reducing the volume of the recycled raw material to obtain a volume reduction treatment product, and a melting treatment step for injecting the volume reduction treatment product into the melting treatment facility for combustion and melting,
In the volume reduction treatment step, a heating step for heating and softening the recycled material, an extrusion molding step for molding the molded body by pushing the softened recycled material from one end side of the molding hole, A cutting step of cutting the molded body discharged from the other end with a cutting blade, and configured to control the specific gravity of the volume-reduced product by pouring water in the extrusion molding step. The ratio D / L between the diameter D and the length L is 0.2 or more and 0.4 or less,
In the volume reduction treatment step, the specific gravity of the volume reduction treatment product is 0.1 or more and 0.4 or less, and the particle size of the volume reduction treatment product is 50 mm or less. Method. The processing method of the recycling raw material of Claim 1 provided with the crushing process which crushes the said recycling raw material, or the crushing material transport process in the front | former stage of the said volume reduction processing process. The method for processing a recycled material according to claim 1 or 2, wherein the melting processing facility is a rotary kiln furnace. The method for processing a recycled material according to any one of claims 1 to 3, wherein the recycled material further contains a metal-containing paper . The said volume-reduction processing thing is mixed with shredder dust, printed circuit boards, glass, and sludges, Then, it throws into the said fusion | melting processing equipment, It is any one of Claims 1-4 characterized by the above-mentioned. Recycled raw material processing method. In the previous stage of the volume reduction treatment step, a reduction step for reducing the crushed material of the recycled material is provided,
The said volume reduction process process WHEREIN: The said volume reduction process is performed with respect to the crushed material discharged | emitted at the said reduction process, The process of the recycling raw material as described in any one of Claim 1 to 5 characterized by the above-mentioned. Method.

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