KR20160027276A - Method for recycling of waste cable - Google Patents

Abstract

The present invention relates to a method to recycle a waste cable, and more specifically, to a method for recycling a waste cable, clearly separating a jelly included in the waste cable and a cover of a fine wire in an eco-friendly manner, thereby allowing a copper wire to be recycled. According to the present invention, the method to recycle the waste cable comprises: a jelly separation step of injecting the fine wire, of which the cover is stripped, of the waste cable into a reagent spray room and heating a liquid paraffin in the reagent spray room to spray the paraffin in a steam state at a high temperature, thereby separating the jelly from the fine wire; a residual jelly separation step of mixing a separation catalyst in an agitation tank containing the fine wire separated from the jelly and performing agitation for 30 minutes to separate the residual jelly remaining on the fine wire from the fine wire; a fine wire cover stripping step of heating the agitation tank to a predetermined temperature to perform thermal treatment to the fine wire separated from the residual jelly, thereby stripping the cover of the fine wire; and a recovery step of recovering the copper wire remaining after striping the cover of the fine wire in the agitation tank.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for regenerating a waste wire, and more particularly, to a method for regenerating a waste wire by separating jelly and fine wire enclosures contained in the waste wire from environmentally and cleanly and recycling the copper wire.

Generally, a wire (cable) for power supply, communication, etc. has a metal wire as a conductor and a covering material for insulation and protection. As the metal wire, copper (copper), aluminum or an alloy thereof is used. As the covering material, polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) and the like are mainly used.

The wires vary in the thickness of the wire, the number of wires, and the coating structure depending on the purpose of use. For example, in the case of a cable used for communication, more specifically, a communication line as an underground buried underground, a jelly line filled with jelly is often used as a covering material.

The jelly line includes a covering material, jelly filled in the covering material, and a plurality of fine wires mounted in the jelly. At this time, the covering material has a multilayer structure including a lapping layer coated on jelly, a shield layer formed on the lapping layer, and a sheath layer formed on the shield layer.

The lapping layer is mainly composed of a non-hygroscopic insulating tape as a vinyl-based (e.g., PVC), and the shielding layer is a film mainly composed of a metal thin film selected from iron (Fe) or aluminum And the sheath layer is mainly composed of PE, PP, or PVC.

The thin wire has a structure in which a copper wire is coated with an insulating resin, and a high-density PE or the like is mainly used for the resin.

The jellies are mainly made of a viscous material such as polybutene, wax and the like. They are distributed around the thin wire to protect the thin wire, to make it waterproof, and also to prevent damage to the thin wires caused by insects and the like.

The electric wires including the jelly wire are collected or discarded due to the purpose of use or the replacement with a new wire (optical cable). Since the waste wire has useful resources such as copper, a variety of regenerating techniques have been attempted.

One example of such a technique is disclosed in Document 1 below.

Patent Document 1 discloses a grinding machine for cutting a collected wire to a predetermined size, a separator for separating the coarse pieces and the copper pieces placed on one side of the grinder, and a separator for connecting the grinder and the separator to the process water supply line And a heating tank for heating and supplying a deodorizer and a process water for removing foreign matter adhered to the waste wire.

However, it is impossible to regenerate the waste wire including jelly as a method by the conventional method as described above. In the case of the jelly - containing waste wire, it is very difficult to separate and recover the copper wire by chipping in case of the jelly wire because it is difficult to grind the jelly wire due to the adhesive force of the high viscosity jelly during the chopping process.

Korean Patent Publication No. 2002-0070408 (published on September 9, 2002)

DISCLOSURE OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a method for producing a paraffinic liquid, The present invention also provides a recycling method of a waste wire which can recycle copper wire as a resource by separating the jelly contained in the fine wire cleanly while separating the jellies contained in the fine wire cleanly and heat-dissolving the last remaining thin wire.

In order to accomplish the above object, the present invention provides a method of regenerating a waste wire, comprising the steps of introducing a fine wire from which an outer shell of a waste wire has been removed into a reagent spray chamber, heating the liquid paraffin in the reagent spray chamber, A jelly separation step of spraying the jelly to separate the jelly from the fine wire; A residual jelly separation step of mixing the separation promoting additive in a stirring tank containing fine jelly-separated fine lines and stirring the mixture for 30 minutes to separate the jelly remaining on the fine line; A thin line skin removing step of heating the stirring tank to a predetermined temperature to heat the fine lines separated from the residual jelly to evolve the fine line skin; And a recovery step of recovering the remaining copper wire from the thin-walled outer sheath in the stirring tank.

As described above, in the method for regenerating the waste wire according to the present invention, the jellies and the fine sheath enclosed in the waste wire are cleanly separated by the environmentally friendly additive without any residue to recycle the copper wire as a resource without damaging it, .

In addition, since expensive facilities such as a conventional chipping system are not required, the cost required for the regeneration process is greatly reduced.

1 is a view showing a general wire (jelly wire).
2 is a process chart showing a method of regenerating a waste wire according to the present invention.
3 is a schematic illustration of a jelly separation step according to the present invention.
4 is a view schematically showing the step of separating residual jelly and the step of removing thin-walled skin according to the present invention.

According to the present invention, there is provided a method of regenerating a waste wire, comprising the steps of introducing a fine wire from which a jacket of a waste wire has been removed into a reagent spray chamber, applying heat to the liquid paraffin in the reagent spray chamber, A jelly separation step for separating the jellies; A residual jelly separation step of mixing the separation promoting additive in a stirring tank containing fine jelly-separated fine lines and stirring the mixture for 30 minutes to separate the jelly remaining on the fine line; A thin line skin removing step of heating the stirring tank to a predetermined temperature to heat the fine lines separated from the residual jelly to evolve the fine line skin; And a recovery step of recovering the remaining copper wire from the thin-walled outer sheath in the stirring tank.

The jelly separation step is characterized in that paraffin, which is a liquid reagent heated by a heating heater, is sprayed in a vapor state through a plurality of nozzles provided in the reagent spray chamber.

Also, the temperature of the paraffin sprayed in the reagent spray chamber is 100 to 150 ° C, and the fine wire is passed through the reagent spray chamber for 10 to 20 minutes.

In addition, the separation promoting additive may be one which comprises 70 to 80% by weight of paraffin, 5 to 10% by weight of silicate powder, 0.7 to 1% by weight of chlorine, 3 to 5% by weight of anhydrous sodium carbonate, and 3 to 5% by weight of sodium hexametaphosphate .

Further, the temperature of the separation promoting additive added in the stirring tank is 70 to 90 ° C.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a general wire (jelly wire), FIG. 2 is a process diagram showing a regeneration method of a waste wire according to the present invention, FIG. 3 is a view schematically showing a jelly separation step according to the present invention And FIG. 4 is a view schematically showing the step of separating residual jelly and the step of removing fine-sheath skin according to the present invention.

1, a general wire (jelly wire) 1 includes a shell 11, a jelly 12 filled in the shell 11, and a plurality of fine wires 13 mounted in the jelly 12, And the thin wire 13 has a structure in which a copper wire 131 is coated with an insulating resin 132 and the resin 132 is mainly a high density PE. The jelly 12 is mainly made of a viscous material such as polybutene or wax.

As shown in FIGS. 2 to 4, the method for regenerating the waste wire according to the present invention includes a jelly separation step S1, a remaining jelly separation step S2, a fine line skin exfoliation step S3, and a recovery step S4 .

First, in the jelly separation step (S1), the fine wire from which the outer wall of the waste wire has been removed is charged into the reagent spray chamber (2), the liquid paraffin is heated in the reagent spray chamber (2) Remove the jelly from the fine wire.

The reagent spray chamber (2) is made of a stainless steel material having a high corrosion resistance and has a tunnel structure. Inside the reagent spray chamber (2), a conveyor (21) is preferably provided for conveying the thin wire from which the outer skin has been removed.

The reagent spraying chamber 2 is connected to a storage tank 4 in which reagent paraffin is stored and a piping. The paraffin which is a liquid reagent is heated inside the storage tank 4, A heating heater 41 is provided so as to be sprayed in a vapor state.

In addition, it is preferable that a compressor (not shown) is provided to blow the paraffin vapor through the nozzle 22 by blowing air into the pipe, but the present invention is not limited thereto and may be replaced with a pump, a blowing fan, or the like.

That is, the liquid paraffin stored in the reservoir 4 is heated by the heating heater 41, and the temperature of the paraffin sprayed in the reagent spray chamber 2 is maintained at 100 to 150 ° C. When passing through the conveyor (21) in the reagent spraying chamber (2) for 10 to 20 minutes, the jelly which wrapped the fine wire is separated.

In the residual jelly separation step (S2), the separation promoting additive is mixed with the stirring tank (3) containing the fine jelly separated from the jelly separation step (S1) and stirred for 30 minutes to separate the jelly remaining on the fine line .

Inside the stirring tank 3, an agitator for stirring the fine wire and the separation promoting additive is provided.

The separation promoting additive comprises 70 to 80% by weight of paraffin, 5 to 10% by weight of silicate powder, 0.7 to 1% by weight of chlorine, 3 to 5% by weight of anhydrous sodium carbonate and 3 to 5% by weight of sodium hexametaphosphate, A perfume may also be included to dissipate the fragrance.

The paraffin is extracted from crude oil and is smooth and uniform in its surface, so that the adhesion of pollutants can be remarkably reduced. In the deaeration process, the paraffin is purified to less than 0.5%, hard and low viscosity at room temperature, .

In the present invention, it is preferable to use a material which has been changed to a liquid state by heating at 60-200 DEG C or less depending on the purified properties.

The liquid paraffin is similar to the lubricating oil having fluidity, and contains a lot of oil, and has excellent oxidation stability and little discoloration and contamination against light and heat even when used for a long time, and has low volatility, low pour point and excellent water resistance Do.

In particular, by using liquid paraffin, the jelly is spread well so that the gel is easily separated from the fine line.

If the paraffin is less than 70% by weight, the function as a release agent for detaching jelly from the fine wire is deteriorated. If the paraffin content exceeds 80% by weight, kneading with other substances becomes difficult, and oil remains on the surface of the fine wire.

The silicate powder is a non-toxic, non-toxic, non-toxic, non-toxic, non-toxic, non-toxic, non-toxic, non-toxic, By using the silicate powder, odor such as ammonia and formaldehyde generated in the source of the odor is adsorbed and easily removed, and the smell is sterilized by the silicate powder against the odor.

As described above, the manufacturing method of the silicate powder used in the present invention is described in detail in Korean Registered Patent No. 0668775 (registered on Jan. 08, 2007) already registered and registered by the present applicant, so a detailed description thereof will be omitted .

In the present invention, the silicate powder prevents the flame from being generated. Particularly, if it is less than 5% by weight, the deodorizing effect and the flame-proofing effect are inferior. If it exceeds 10% by weight, the silicate powder is not dissolved well.

The chlorine is an inorganic chlorine product and is used in the form of tablets and granules. It can be stored for a long time at room temperature because there is little loss of effective chlorine content. It is possible to sterilize and disinfect sewage, wastewater and final discharge water by using solid chlorine in the form of tablets and granules It is possible to sterilize the harmful bacteria that are alive and clean the hygiene in the treated water.

In the present invention, the chlorine is used for odor removal. Particularly, when the content is less than 0.7 wt%, the desired disinfecting effect can not be obtained. When the content is more than 1 wt%, chlorine is strong.

The anhydrous sodium carbonate serves to slowly dissolve the red rust by masking the acid surface of the metal surface which can dissolve the silicate in the water. In addition, due to the combined chemical function of silicate and anhydrous sodium carbonate, the Si ions in the silicate bind to the anions of the organic materials in the water to prevent them from adhering to the metal surface, while the Na + ions of the anhydrous sodium carbonate are adsorbed on the surface of the metal ions And acts to suppress the electrical erosion of the electrode.

The anhydrous sodium carbonate separates the jelly and fine sheath shell of the waste wire in the agitation tank 3, prevents the copper wire from being corroded, and removes the smell.

When the anhydrous sodium carbonate is less than 3% by weight, corrosion resistance and odor removal performance are deteriorated. When the anhydrous sodium carbonate is more than 5% by weight, the solubility is low and the reaction time becomes long.

The sodium hexametaphosphate has an alkaline ability to disperse with respect to minerals and has a strong metal ion blocking action against heavy metals in water and inhibits the oxidation of fatty substances.

When sodium hexametaphosphate is added in an amount less than 3% by weight, the corrosion resistance and odor removal performance are lowered. When the amount of sodium hexametaphosphate exceeds 5% by weight, the solubility of the sodium hexametaphosphate is low.

Since the separation promoting additive having the above characteristics is eco-friendly, the jellies can be cleanly separated from the fine wire and the oxidation of the fine wire can be prevented.

In the thin-line skin exfoliation step (S3), the stirrer (3) is heated to a predetermined temperature to heat the thin wire from which the remaining jelly has been separated to evacuate the thin-line skin.

A boiler 5 for heating the heating medium for heating the agitated product in the agitating tank 3 is preferably provided outside the agitating tank 3, The stirring tank 3 is heated.

At this time, oil is used as the heat medium flowing in the boiler 5, and when the stirring tank 3 is directly heated by an electric heater or the like, the stirring material in the stirring tank 3 close to the solidifying tank 3 is solidified or burned There is a problem. In the present invention, the temperature is relatively easy to control as compared with the electric heater, and it is preferable to use oil that can be heated to a high temperature as a heating medium.

If the temperature of the separation promoting additive added to the stirring tank 3 is maintained at 70 to 90 ° C. by heating the stirring tank 3 through the boiler 5, the boiling point is 70 ° C. and the melting point is 85 ° C. As the thin-walled skin is melted and concentrated, it slowly dissolves while being completely melted.

In the recovery step (S4), the thin wire shell is removed from the stirring tank (3) and the remaining copper wire is recovered. That is, after the jelly separation step (S 1), the remaining jelly separation step (S 2) and the fine line skin ripening step (S 3) are sequentially performed, the stirring vessel (3) Only copper wire will be left, and it can be recovered and recycled as a resource.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many obvious changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention should therefore be construed in light of the claims set forth to cover many of such variations.

1: Wires
11: envelope
12: Jelly
13: Fine wire
2: reagent dispensing chamber
21: Conveyor
22: Nozzle
3: stirring tank
4: Storage tank
41: Heating heater
5: Boiler

Claims (5)

A jelly separation step of injecting a fine wire from which a sheath of a lung wire has been removed into a reagent spray chamber, applying heat to liquid paraffin in the reagent spray chamber, and spraying the liquid paraffin in a high temperature steam state to separate the jelly from the fine wire;
A residual jelly separation step of mixing the separation promoting additive in a stirring tank containing fine jelly-separated fine lines and stirring the mixture for 30 minutes to separate the jelly remaining on the fine line;
A thin line skin removing step of heating the stirring tank to a predetermined temperature to heat the fine lines separated from the residual jelly to evolve the fine line skin;
And a recovery step of recovering the remaining copper wire from the thin-walled outer sheath in the stirring tank.
The regeneration method of waste wire according to claim 1, wherein the jelly separation step comprises spraying paraffin, which is a liquid reagent heated by a heater, in a vapor state through a plurality of nozzles provided in a reagent spray chamber .
The method according to claim 1, wherein the temperature of the paraffin sprayed in the reagent spray chamber is 100 to 150 ° C, and the fine wire is passed through the reagent chamber for 10 to 20 minutes.
The method of claim 1, wherein the separation promoting additive is selected from the group consisting of 70-80% by weight paraffin, 5-10% by weight silicate powder, 0.7-1% by weight chlorine, 3-5% by weight anhydrous sodium carbonate, 3-5% by weight sodium hexametaphosphate, And a control unit for controlling the control unit.
The method according to claim 1, wherein the temperature of the separation promoting additive added in the stirring tank is 70 to 90 ° C.

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