KR100687579B1 - System for removal of fine copper from waste covered wire - Google Patents

Abstract

The present invention relates to an electrostatic screening system for removing particulate copper from the waste wire coating, and more particularly, an electrode induction plate made of a special material having a size and a separation distance to increase the mutual separation rate of copper and the waste wire, and the electrode induction. It relates to an electrostatic screening system comprising a separation plate having a separation distance for increasing the mutual separation rate of copper and the closed wire according to the plate capacitance.

The electrostatic screening system for removing particulate copper from the waste wire coating of the present invention comprises: a light feeding apparatus for sharpening a sample of the waste wire coating and copper cut into a negative electrode electrostatic induction plate; A negative electrode power supply for applying negative electrode power from the power supply device, having a lower electrical conductivity than the copper, and generating charge by friction with the sample by vibration of a vibrator provided below the sample supplied from the light feeding device. Induction plate; A positive electrode metal network having a width equal to or wider than that of the negative electrode electrostatic induction plate and to which a positive power is applied from the power supply device; And a separator plate disposed between the negative electrode electrostatic induction plate and the positive electrode metal network to separate fine copper and the waste wire coating from the sample.

Therefore, the electrostatic screening system for the removal of particulate copper from the waste wire coating of the present invention is characterized in that the supply voltage, the distance between the negative electrode electrostatic induction plate and the positive electrode metal network, the ratio of the width of the negative electrode electrostatic induction plate and the positive electrode metal network, and the negative electrode electrostatic induction By presenting the optimum conditions for the distance between the plate and the separator, the amount of light dropping of the sample, the material of the negative electrode electrostatic induction plate and the positive electrode metal mesh, and so on, the processing capacity is more than five times larger than that of the conventional electrostatic separator, and the fine particles of 0.1 mm are screened. It is also possible and applicable to the selection of particulate metal and nonmetallic mixtures as well as to recycling of other waste resources.

Blackout, closed wire, fine particles, copper.

Description

System for removal of fine copper from waste covered wire}

1 is a production statistics by domestic wire types in 2002.

2 to 5 are electrostatic screening apparatus according to the prior art.

6 is a supply sample of the electrostatic screening system according to the present invention.

7 is a schematic diagram of one embodiment of an electrostatic screening system according to the present invention;

8 is a graph showing the sorting efficiency according to the change in voltage of the electrostatic screening system according to the present invention.

9 is a graph showing the sorting efficiency according to the distance of the positive electrode metal mesh from the negative electrode electrostatic induction plate of the electrostatic screening system according to the present invention.

10 is a graph showing the sorting efficiency according to the horizontal distance of the separator plate from the negative electrode electrostatic induction plate of the electrostatic screening system according to the present invention.

11 is a graph showing the sorting efficiency according to the vertical distance of the separator from the negative electrode electrostatic induction plate of the electrostatic screening system according to the present invention.

12 is a graph showing the sorting efficiency according to the amount of steepness of the sample of the electrostatic screening system according to the present invention.

13 is a graph showing the sorting efficiency according to the ratio of the width of the negative electrode electrostatic induction plate and the positive electrode metal mesh of the electrostatic screening system according to the present invention.

14 is a graph showing the sorting efficiency according to the material of the positive electrode metal mesh of the electrostatic screening system according to the present invention.

15 is a structure according to the material of the positive electrode metal mesh of the electrostatic screening system according to the present invention.

16 and 17 is a product obtained by applying the electrostatic screening system according to the present invention.

<Description of Symbols for Main Parts of Drawings>

           1: dimming device 2: negative electrode electrostatic induction plate

           3: vibrator 4: positive electrode metal network

           5: separator

The present invention relates to an electrostatic screening system for the removal of particulate copper from the waste wire coating, and more particularly, to a negative electrode electrostatic induction plate (Negative electrode) having a size and separation distance to increase the mutual separation rate of copper and the waste wire. And a separator having a positive electrode metal network, and a separation plate having a separation distance for increasing the mutual separation rate between copper and the waste wire according to the capacitance of the electrodes.

Most of the waste wires are separated into copper and coated plastics (PE, PP, PVC) and recycled. However, such as communication lines, fine waste wires are not recycled due to insufficient development of separation technology.

As shown in FIG. 1, in 2002, the domestic cable production statistics in South Korea, annual cable production of about 4 trillion won, the generation of waste wires of about 500 billion yuan, and the communication and optical cable lines of about 500 billion yuan, waste wires 100 billion won You can see it happen.

If the separation efficiency of the fine copper wire is low, it is impossible to recycle the coated plastics, and a high cost is required for their treatment. In the case of fine copper wires such as communication lines, when copper is removed, the remainder is made of PE, PP, and PVC, and all of them can be separated and recycled. Rebuilding, replacing old telecommunications lines, and increasing the use of automobiles and electronics are increasing the generation of waste wires every year. For the recycling of waste wires, there is an urgent need for technology to completely remove copper and clad plastic. When the waste plastic is recycled, it is impossible to recycle the plastic unless the fine metal material is removed. Therefore, the development of technology capable of completely removing the particulate metal in the pretreatment process is urgently needed.

Plastics have increased by more than 10% annually because of their superior material properties, which can predict about 11 million tons of production and 5 million tons of waste plastics within five years. If waste plastic recycling technology is not developed, it is estimated that not only environmental problems but also economic losses are large. The development of sorting technology for waste plastics can contribute to environmental conservation, useful resource recycling, plastic industry development and national economic development.

In general, an electric wire consists of a conductor part and a cladding part. The conductor is copper, aluminum, and the like, and is a part that facilitates electric flow, which is the most basic electrical performance of an electric wire. The covering part is made of PVC, PE, Rubber, etc. to insulate the flow of electricity so that the flow of electricity does not come out of the conductor part, and also the outer coating which is made of PVC, PE, Rubber, etc. to protect the insulator and conductor parts from damage from the external environment. Can be divided into Therefore, in order to remove particulate copper from the waste wire coating, the conductor must be separated from the insulator and the outer coating.

Korean Utility Model Registration No. 288589, which is one of the electrostatic screening devices for removing particulate copper from the conventional waste wire coating, as shown in FIG. 2, shows that Nitrile-butadiene rubber (NBR) has XE ₂ (or activated carbon). Powder) to make 27-30% of the belt (100, below NA belt) to make a negative (-) pole, and to charge the stainless steel 200 to a positive (+) pole to constitute an electrolytic device, negative The vertically moving paper belt 300 is installed at the upper end of the negative NA belt for electrostatic induction, and the fine copper particles having polarity are charged with the same polarity as the NA belt. When moved vertically with respect to the NA belt at the top, the fine copper powder repels and is attracted by the electrostatic induction on the paper belt. 400 is recovered, and the devitrified portion is recovered in the collection tank 500 installed at the rear of the + pole, and the shell is attached to the NA belt surface, which is the-pole, so that it can be detached to the shell collection tank 600 by a scraper (SCRAPER). By providing an electrostatic capacitive separation device for separating copper from a waste wire mixed shell, it is possible to separate the fine copper particles and copper powder attached to the mixed shell by more than 2-10% by electrolytic and electrostatic induction. You can see that.

However, the problem of the electrostatic induction separating device of the registration utility model, the paper belt 300 must be replaced when used for a long time, the simple structure of the stainless steel network 200 is insufficient to generate the optimal electrostatic induction force, blackout The structure of the three collection tanks for separating the plastic component and the copper component separated by the inductive force does not clearly indicate the separation rate of the plastic component and the fine copper particles.

As another conventional technology, the Korean Utility Model Registration No. 232140 shown in Fig. 3, Japanese Laid-Open Patent JP2001-283661 shown in Fig. 4, Japanese Laid-Open Patent No. JP-P7-178351 shown in Fig. 5 and the like will be described as an example.

Referring to the structure of the electrostatic separator shown in Figures 3 and 5, by giving the opposite polarity symmetrically opposite to both side walls to separate while falling freely, coarse particles can be separated by such a device, small particles of less than 1mm Power failure screening is difficult. That is, eddy currents are generated due to the opposite polarities of the two side walls, so that the microparticles swing and are likely to be attracted to both sides by static electricity.

Looking at the structure of the electrostatic separator shown in Figure 4, it can be seen that the sample is supplied to the rotating plate and separated by a separation tank provided in the lower rotating plate. In such a structure, there is a problem that accurate separation can be achieved only when the mixing ratio and the supply amount of the sample are always constant.

Accordingly, an object of the present invention is to solve the above-mentioned disadvantages and problems of the prior art, and to provide a negative electrode electrostatic induction plate and a positive electrode metal network having a size and a separation distance to increase the mutual separation rate of copper and closed wire. .

Another object of the present invention is to provide a negative electrode electrostatic induction plate having lower electrical conductivity than copper and increasing work function value by frictional charging by a vibrator.

In addition, another object of the present invention is to provide a separation plate having a separation distance to increase the mutual separation rate of copper and closed wires according to the capacitance of the electrodes.

The object of the present invention is a light discharging device for sharpening the sample of the waste wire coating and copper cut by a negative electrode electrostatic induction plate; A negative electrode power supply for applying negative electrode power from the power supply device, having a lower electrical conductivity than the copper, and generating charge by friction with the sample by vibration of a vibrator provided below the sample supplied from the light feeding device. Induction plate; A positive electrode metal network having a width equal to or wider than that of the negative electrode electrostatic induction plate and to which a positive power is applied from the power supply device; And a separator plate disposed between the negative electrode electrostatic induction plate and the positive electrode metal mesh to separate fine copper and waste wire coating from the sample. .

Details of the above object and technical configuration of the present invention and the effects thereof according to the present invention will be more clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

Samples used in the particulate electrostatic screening system of an embodiment of the present invention is an optical communication cable wire, as shown in Figure 6, is used to cut to 3mm or less to separate the fine copper and plastic coating. In one embodiment of the present invention, the electrostatic induction screening device for the non-ferrous metal particles are high specific gravity in the case of metal materials, so that the larger the particles can be separated from the plastic material, but the thinner and finer metal particles such as communication lines have a larger specific surface area. Since it is difficult to separate by specific gravity screening, it is used to cut below 3mm for complete removal.

Figure 7 shows a schematic diagram of the electrostatic induction screening system according to an embodiment of the present invention. When the sample is suddenly sharpened by the negative electrode electrostatic induction plate 2 in which the negative current flows from the light feeding device 1 of the sample on the left side, the conductive material of the metal is negative (-) same as that of the negative electrode electrostatic induction plate 2. 2) is moved forward by vibrator 3 attached to the pole and attached underneath the negative electrode electrostatic induction plate 2. When the particles induced by the negative pole reach the right end of the negative electrode electrostatic induction plate 2 and fall down, the positive electrode metal network 4 connected to the positive pole installed on the right attracts the induced metal particles. It will be separated from non-conductive plastics.

The electrostatic induction screening system of the present invention constitutes the negative electrode electrostatic induction plate 2 so as to effectively separate the fine particles. Up to now, the negative electrode electrostatic induction plate is made of a metal material that flows well such as copper or other metals. However, the present invention uses a negative electrode electrostatic induction plate of a conductive material having a lower electrical conductivity than copper or other metals. It is configured to increase the electrostatic induction. In addition, the negative electrode electrostatic induction plate is manufactured by mixing conductive particulate matter, and configured to increase the electrostatic induction efficiency by charging by friction between the sample and the negative electrode electrostatic induction plate 2 by a vibrator. This is because the difference in the work function value between the negative electrode electrostatic induction plate 2 and the sample (metal particles) becomes large, and thus the electron movement between the negative electrode electrostatic induction plate 2 and the sample is made more active. In addition, the electrostatic induction screening system of the present invention has a wider negative electrode electrostatic induction plate than the conventionally developed electrostatic induction screening system and a wider width of the opposite electrode that attracts the induced particles, thereby increasing the processing capacity by more than five times the conventional one. . Therefore, the negative electrode electrostatic induction plate 2 was made to be capable of sorting particles of 0.1 mm by setting the charging effect by friction and the width of the counter electrode relatively wide. The electrostatic induction screening device is expected to be applied to the screening of fine metal and nonmetal mixtures and other waste resource recycling in the future.

8 is a result of experimenting with varying the voltage intensity from 25 kW to 45 kW in order to observe the screening efficiency according to the voltage intensity which has a great influence on the electrostatic screening. As a result, the recovery rate of plastic PVC is not significantly affected by the strength of the voltage, but the copper particle, which is a fine nonferrous metal, needs to be more than 40㎸, which shows that the screening efficiency is more than 98%. In other words, the recovery rate of plastic according to the voltage intensity is only 99.5% and 98.9%, respectively, at 25㎸ with the lowest voltage and 45㎸ with the highest voltage. It is the lowest at 60% and the copper removal rate increases with increasing voltage intensity, and the difference is about 40% with 99.6% at 45mA. However, the removal rate of particulate copper, which is a nonferrous metal, was 98.5% even at a voltage intensity of 40 mA. In the present invention, the voltage strength of 40 mA was set as an optimum experimental condition in consideration of the stability of experiment and energy consumption. In other words, at 40 조건 of the optimum experimental condition, the plastic recovery rate was 98.9%, the removal rate of copper particles and the residual amount of copper particles in plastics were 98.5% and 0.4%, respectively. In addition, the strength of the current is related to the capacity of the device, the higher the current strength may be effective because it does not affect the experimental efficiency, but in the experiments of the present invention because the problem of the safety of the operator, the selection efficiency of the current as possible It was made as low as possible without affecting. The experimental result of FIG. 8 is an experiment performed at 0.1 A, and preferably set in the range of 0.05A to 2A.

FIG. 9 shows the distance between the negative electrode electrostatic induction plate 2 of the negative electrode and the positive electrode metal network 4 of the positive electrode attracting the induced conductive particles in order to observe the effect on the electrostatic screening. Experimental results varying to ㎝. The reason why the distance between the negative electrode electrostatic induction plate 2 and the positive electrode metal network 4 affects the electrostatic screening is that the energy attracting the induced conductive particles varies according to their distance, and the electrode depends on the distance thereof. This is because the environment of the electric field formed therebetween changes.

Experimental results according to the present invention can be seen that the distance between the negative electrode electrostatic induction plate 2 and the positive electrode metal mesh 4 has little effect on the plastic recovery rate. Since the electrostatic induction does not occur by the negative electrode electrostatic induction plate (2) because the plastic is a non-conductor, it is moved to the end of the negative electrode electrostatic induction plate (2) by the vibrator (3) attached below the negative electrode electrostatic induction plate (2). Because it is recovered off. However, the fine copper, which is a nonferrous metal, has the highest removal rate from 99.8% to 99.5% at the point where the distance from the negative electrode induction plate (2) to the positive electrode metal mesh (4) is 40 cm to 60 cm, respectively. It can be seen that the removal rate of the ground copper is greatly reduced.

As described above, when the distance between the negative electrode electrostatic induction plate 2 and the positive electrode metal mesh 4 is closer than 40 cm, the negative effect on the removal of the copper, which is a conductor, is due to the positively induced copper particles. It is thought that the metal mesh 4 can be easily pulled up and increase, but the electric field formed between the two electrodes, such as interference caused by eddy phenomenon, does not provide a good environment for screening. And when the distance between the two electrodes is increased more than 60cm to form a good electric field that the positive electrode metal mesh 4 can attract the electrostatically-induced conductor particles, but because the distance is too far, the attracting energy is weakened. Therefore, in the present invention, the preferred distance between the negative electrode induction plate (2) and the positive electrode metal network (4) in consideration of the plastic recovery rate and the removal rate of the non-ferrous metal particulate copper is 50 cm, wherein the plastic recovery rate and the fine copper removal rate is 99.5% and 99.6%.

The copper particles electrostatically induced by the negative electrode electrostatic induction plate 2 are moved to the end of the negative electrode electrostatic induction plate 2 by the vibrator 3 and dropped by the positive electrode metal net 4 to be separated from the non-conductive plastic. At this time, since the non-conductive plastic is not electrostatically induced, it falls down directly from the end of the negative electrode electrostatic induction plate (2), but the copper particles are electrostatically induced and led to the positive electrode metal network (4) to fly away from the falling point of the plastic and collect. do. Therefore, if the separation plate (5) capable of separating them between the falling point of the plastic and copper can increase the sorting efficiency.

10 is provided with a separator 5 at a constant horizontal distance from the end of the negative electrode electrostatic induction plate 2 toward the positive electrode metal network 4 in order to increase the separation efficiency of the electrostatically induced copper and plastic particles. The effect on fine copper removal was observed. As a result of the experiment of the present invention, when the position of the separator plate 5 is closer to the negative electrode electrostatic induction plate 2, the plastic recovery rate decreases, but the removal rate of particulate copper increases, whereas the position of the separator plate 5 is positive electrode metal mesh ( 4) the removal rate of the non-ferrous metal copper particles is reduced but the plastic recovery rate is increased, it can be seen that the plastic recovery rate and the removal rate of the copper particles to the opposite position depending on the position of the separation plate (5). That is, since the plastic recovery point becomes smaller when the horizontal position of the separator 5 approaches the negative electrode electrostatic induction plate 2, relatively pure plastic can be obtained, but some plastics can be moved to the copper recovery point. And when the position of the separating plate 5 is far from the negative electrode electrostatic induction plate 2, the plastic recovery point is widened and the copper recovery point is narrowed, thereby increasing the plastic recovery rate but increasing the possibility that some copper particles may be incorporated into the plastic. Because.

Therefore, in the present invention, the optimum experimental conditions were the point where the horizontal distance of the separator 5 from the negative electrode induction plate 2 having the highest plastic recovery rate and copper removal rate was 4 cm, wherein the plastic recovery rate and copper removal rate were 96.8, respectively. % And 99.8% were obtained.

FIG. 11 shows the effect of the vertical height of the separator 5 on the separation between the plastic and the particulate copper at the point of 4 cm, which is the optimal point of the horizontal distance of the separator 5 from the negative electrode electrostatic induction plate 2. It is the result of experiment by changing the vertical distance from 20cm to 35cm at the point of 4cm which is the optimal point of horizontal distance. Experimental results show that the plastic recovery rate has little effect on the vertical distance, but the removal rate of the fine copper decreases as the vertical distance of the separation plate 5 increases and increases as the distance of 4 cm is the optimal point of the horizontal distance. Can be. In other words, the plastic recovery rate is almost 97.1% and 96.4% in the case of 20cm closest to the distance between 4cm which is the optimal point of the horizontal distance and 35cm farthest between the distance between the separation plate 5 located below. Although the removal rate of copper is the lowest at 70.1% at 20cm and 99.8% at 35cm, the gap between separation plate 5 and 4cm, the optimal point of horizontal distance, is selected. It can be seen that it is effective for efficiency.

The reason why the gap between the negative electrode electrostatic induction plate 2 and the separator 5 has a large effect on the copper removal rate is that, if the distance between them is too small, the induced copper particles are introduced into the positive electrode metal network 4. This is because the space and time that can be attracted by the film is reduced, and on the contrary, when the gap between them is wide, the copper particles provide enough space and time to be attracted to the positive electrode metal network 4.

FIG. 12 shows the results of a sudden change in light quantity of a sample for identifying an optimum treatment capacity of a particulate electrostatic screening device used in an experiment of the present invention. As a result of the experiment, the plastic recovery rate is almost unchanged according to the change in the amount of dipping of the sample, but the removal rate of the fine copper does not change to 99.8% and 99.7% at 100g / min and 200g / min, respectively. This decreases to 83.2% at 250 g / min. Therefore, the optimum amount of treatment of the experimental apparatus used in the present invention is preferably 150 g / min, and the recovery rate of plastic and removal rate of copper were 98.9% and 99.7%, respectively.

FIG. 13 is an experimental result for observing the effect of the ratio of the width of the negative electrode electrostatic induction plate 2 and the width of the positive electrode metal net 4 attracting the induced conductive metal material on the removal rate of the fine copper particles. The material of the net | tube 4 used the screen type stainless steel. As a result, when the width of the negative electrode electrostatic induction plate (2) and the width of the positive electrode metal mesh (4) is 1: 1, the plastic recovery rate is the highest as 99.6%, but the copper removal rate is 90.1%, which is not effective. However, as the width ratio of the negative electrode induction plate (2) and the positive electrode metal mesh (4) increases, the removal rate of copper also increases, indicating that the copper removal rate is 95.2% at 1: 1.5 and 99.8% at 1: 2. It can be seen that the width of the induction plate 2 and the positive electrode metal network 4 has a very important effect on the sorting efficiency. That is, in order to remove the copper particles, which are conductors from the plastic, an excellent screening efficiency may be obtained when the width of the positive electrode metal network 4 is twice as wide as that of the negative electrode electrostatic induction plate 2.

The reason why the width of the negative electrode electrostatic induction plate 2 and the positive electrode metal mesh 4 has a great influence on the sorting efficiency as described above is that the width of the positive electrode metal induction plate 4 acts on the negative electrode electrostatic induction plate 2 according to the width of the positive electrode metal induction plate 4. This is because the formation of the electric field is different. That is, when the width of the positive electrode metal net 4 is wider than the width of the negative electrode electrostatic induction plate 2 and the positive electrode metal net 4, it is possible to form a more dense electric field in the induced metal material, thereby attracting force. This can be increased.

FIG. 14 shows two materials of stainless and copper for observing the effect of the material of the positive electrode metal net 4 attracting the copper particles induced by the negative electrode electrostatic induction plate 2 to the negative electrode (-) on the screening efficiency. The experimental results are shown. Theoretically, because copper has higher conductivity, it is thought that copper material is more effective as positive electrode metal net (4) than stainless steel, but the experimental results show that stainless steel is used as positive electrode metal net (4) than copper material. As the removal rate is higher by 4%, the positive electrode metal mesh 4 proves that the stainless material is better.

FIG. 15 shows an electrode made of stainless and copper materials used in the material change experiment of the positive electrode metal net 4, and is suitable to form an electric field capable of effectively attracting a metal material falling from the negative electrode electrostatic induction plate 2. You can see it installed by the support at its height. As with the experimental results described above, it was more effective to fabricate the positive electrode metal mesh 4 with a stainless material, at which the plastic recovery rate and the copper removal rate were 96.3%, respectively, at the optimum experimental conditions according to the several distances and the amount of sharpening described above. And 99.8%.

FIG. 16 and FIG. 17 show experimental products obtained under optimum experimental conditions using the electrostatic screening system developed in this study for removing particulate nonferrous metals. FIG. 16 is a product from which plastic and particulate copper are removed from a communication line manufactured to 3 mm or less, and FIG. 17 is a product tested to compare the effect of copper particle form on electrostatic screening.

Summarizing the optimum conditions and the preferred ranges of the various conditions according to the above-described experimental results, the optimum condition of the voltage is 40 kV and the preferred range is 25 kW to 45 kW, the negative electrode capacitive guide plate 2 and the positive electrode metal mesh The optimum distance between (4) is 50 cm, preferably 40 cm to 60 cm, and the horizontal optimum distance from the negative electrode induction plate 2 to the separator 5 is 4 cm, preferably 3 cm to 5 cm. The vertical optimum distance from the 4 cm horizontal distance is 35 cm, preferably 30 cm to 50 cm, and the optimal light intensity of the sample is 150 g / min and preferably 100 g / min to 250 g / min. The optimum ratio with respect to the width | variety of the board | substrate 2 and the positive electrode metal mesh 4 is 1: 2, Preferably it is 1: 1-1: 2, The material of the positive electrode metal mesh 5 is a stainless material, and the said Recovery of plastics and particulate copper under conditions such as The removal rates were obtained results respectively 97% and 99%.

Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible. That is, the optimum conditions and desired ranges can be changed and modified according to the target removal rate of plastic and copper.

Therefore, the electrostatic screening system for the removal of particulate copper from the waste wire coating of the present invention is characterized in that the supply voltage, the distance between the negative electrode electrostatic induction plate and the positive electrode metal network, the ratio of the width of the negative electrode electrostatic induction plate and the positive electrode metal network, and the negative electrode electrostatic induction By presenting the optimum conditions for the distance between the plate and the separator, the amount of light dropping of the sample, the material of the negative electrode electrostatic induction plate and the positive electrode metal mesh, and so on, the processing capacity is more than five times larger than that of the conventional electrostatic separator, and the fineness of 0.1 mm It is also possible and applicable to the selection of particulate metal and nonmetallic mixtures as well as to recycling of other waste resources.

Claims (8)

In the electrostatic screening system for the removal of particulate copper from the waste wire coating, A light discharging device for discharging the waste wire coating and the copper cut sample to a negative electrode electrostatic induction plate; The negative power is applied from the power supply device, and has a lower electrical conductivity than the copper, and friction to increase the difference between the work function value and the sample by vibrating the vibrator provided below the sample supplied from the light feeding device. A negative electrode electrostatic induction plate for generating charge by; A positive electrode metal network having a width equal to or wider than that of the negative electrode electrostatic induction plate and to which a positive power is applied from the power supply device to attract a conductive sample derived from the negative electrode electrostatic induction plate; And Separation plate between the negative electrode electrostatic induction plate and the positive electrode metal network to separate the fine copper and the waste wire coating from the sample An electrostatic screening system for the removal of particulate copper from the waste wire coating, comprising: a. The method of claim 1, And the sample is cut to 3 mm or less, wherein the electrostatic screening system for particulate copper removal from the waste wire coating. The method of claim 1, The negative electrode electrostatic induction plate and the positive electrode metal mesh is applied to the electrostatic screening system for removing particulate copper from the waste wire coating, characterized in that a voltage of 25 kV to 45 kV is applied. The method of claim 1, The negative electrode electrostatic induction plate and the positive electrode metal mesh is electrostatic screening system for removing particulate copper from the waste wire coating, characterized in that spaced from 40cm to 60cm. The method of claim 1, And a horizontal distance of the negative electrode electrostatic induction plate and the separation plate is 3 cm to 5 cm, and a vertical distance of 30 cm to 50 cm. The method of claim 1, Electrostatic screening system for the removal of particulate copper from the waste wire coating, characterized in that the amount of light of the sample is 100g / min to 250g / min. The method of claim 1, The positive electrode metal net is electrostatic screening system for removing particulate copper from the waste wire coating made of stainless steel. The method of claim 1, And a predetermined width of said positive electrode metal net is one to two times wider than the width of said negative electrode electrostatic induction plate.

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