阅读说明：本技术 一种废旧细电缆的回收方法 (A kind of recovery method of waste and old Thin cable ) 是由 刘传刚 于 2019-08-26 设计创作，主要内容包括：本发明属于废旧电缆处理技术领域,特别是一种废旧细电缆的回收方法,包括以下步骤：(1)将废旧细电缆卷绕成束并静置不低于24h；(2)对卷绕成束的废旧细电缆进行逐节切断,得到截断后的废旧细电缆,再将其转入离心机中使塑料线皮与金属线芯分离开来；其中,截断后的废旧细电缆的长度小于0.5cm；本发明通过将废旧细电缆卷绕成束,不仅能够使其塑料线皮与金属线芯之间形成一定的应力,使得塑料线皮与金属线芯的临界处形成一定的空间而方便二者的分离,而且,卷绕成束的废旧细电缆方便截断形成短小的废旧细电缆；利用离心机的离心力使塑料线皮与金属线芯发生分离,即可分别获得塑料线皮和金属线芯而实现对废旧细电缆的回收处理。(The invention belongs to waste and old cable handling technical field, especially a kind of recovery method of waste and old Thin cable, comprising the following steps: (1) by waste fine cable winding bunchy and stand not less than for 24 hours；(2) the bundles of waste and old Thin cable of winding is cut off section by section, the waste and old Thin cable after being truncated, then being transferred in centrifuge separates plastic cord skin with metal core；Wherein, the length of the waste and old Thin cable after truncation is less than 0.5cm；The present invention is by by waste fine cable winding bunchy, it can not only make to form certain stress between its plastic cord skin and metal core, so that the critical part of plastic cord skin and metal core forms certain space and facilitates the separation of the two, moreover, the bundles of waste and old Thin cable of winding facilitates truncation to form short and small waste and old Thin cable；Plastic cord skin is separated with metal core using the centrifugal force of centrifuge, can be obtained plastic cord skin and metal core respectively and be realized the recovery processing to waste and old Thin cable.)

1. a kind of recovery method of waste and old Thin cable, which comprises the following steps:

(1) it by waste fine cable winding bunchy and stands not less than for 24 hours；

(2) cut off section by section to winding bundles of waste and old Thin cable, the waste and old Thin cable after being truncated, then be transferred to from Separate plastic cord skin with metal core；

Wherein, the length of the waste and old Thin cable after truncation is less than 0.5cm.

2. the recovery method of waste and old Thin cable according to claim 1, which is characterized in that in step (1), first to waste and old Thin cable is preheated, then preheating temperature winds bunchy to 40~45 DEG C again.

3. the recovery method of waste and old Thin cable according to claim 1, which is characterized in that in step (2), after being first truncated Waste and old Thin cable be immersed into 10~20min of immersion treatment in cleaning solution, then filter out waste and old Thin cable and be transferred in centrifuge It is centrifuged.

4. the recovery method of waste and old Thin cable according to claim 3, which is characterized in that the cleaning solution be containing The clear water of 2.0~5.5wt% surfactant.

5. the recovery method of waste and old Thin cable according to claim 1, which is characterized in that in step (1), the waste fine The diameter of beam formed by cable winding is 3~8cm.

6. the recovery method of waste and old Thin cable according to claim 1, which is characterized in that in step (2), the centrifuge Revolving speed be 1500~2500r/min.

7. the recovery method of waste and old Thin cable according to claim 1, which is characterized in that further include utilizing electrostatic separation Machine further sorts the plastic cord skin obtained in step (2), rejects the plastic cord skin for not removing metal core.

Technical field

The invention belongs to waste and old cable handling technical field, especially a kind of recovery method of waste and old Thin cable.

Background technique

Wire and cable is to transmit electric (magnetic) energy, information and the wire product for realizing electromagnetic energy conversion, the electric wire of broad sense Cable is also referred to simply as cable, and the cable of narrow sense refers to insulated cable, it may be defined as by one or more insulated wire cores and it The clad that may respectively have, aggregate composed by total protective layer and outer jacket.

With the continuous development of technology, in order to obtain metal contained in wire and cable and avoid waste and old cable to life The recycling of state environmental effects, scrap electrical wires cable is gradually taken seriously, and has baked wheaten cake, peeling, crushing, freezing etc. in the prior art Etc. modes handle scrap electrical wires cable；Wherein, baked wheaten cake is a kind of more traditional method, utilizes the line skin of scrap electrical wires cable Directly its burning can be handled with aptitude to burn, then the metal of recycling the inside, such as copper；However, the method burnt not only is held The pollution of environment is easily caused, and during burning, metal line surface will appear oxidation, cause the drop of metal recovery rate It is low；Also, it joined fire retardant in more and more CABLE MATERIALSs, therefore burn more hard.The method of peeling processing is past Toward larger-diameter wire and cable is only applicable to, for the wire and cable of thin diameter, such as cable, electric wire, existing wire stripping Machine equipment is often difficult to be applicable in.Comminuting method is that scrap electrical wires cable is peeled by crushing, and then utilizes washing or air-flow point Change, the mode of electrostatic separation separates metal and plastics, and this method applicable surface is wider, still, by the complete powder of scrap electrical wires cable It is broken and using washing or air-flow come realize differentiation, consume energy it is higher.Freezing is using liquid nitrogen as refrigerant, so that scrap electrical wires Cable is frozen and then is become fragile under conditions of ultralow temperature, then by broken and vibration, so that plastics and metal separate, still The processing method higher cost, it is difficult to which heavy industrialization operation is not also put into actual production.

Summary of the invention

It is an object of the invention to overcome deficiency in the prior art, a kind of recovery method of waste and old Thin cable is provided, really The line skin for protecting waste and old Thin cable is efficiently separated with metal wire, and reduces the separation costs, improves industrial applicibility.

To achieve the goals above, the present invention is achieved by the following scheme:

A kind of recovery method of waste and old Thin cable, comprising the following steps:

(1) it by waste fine cable winding bunchy and stands not less than for 24 hours；

(2) it is cut off section by section to winding bundles of waste and old Thin cable, the waste and old Thin cable after being truncated, then by its turn Enter to make in centrifuge plastic cord skin to separate with metal core；

Wherein, the length of the waste and old Thin cable after truncation is less than 0.5cm.

The method of traditional peeling can separate the plastic cord skin of large-diameter electric wire cable with metal core well, But wire stripping machine equipment communication cable lesser for diameter, cable or electric wire etc. are difficult with, and cannot achieve plastic cord skin With efficiently separating for metal core.In the present invention, by making its plastic cord skin and metal core for waste fine cable winding bunchy Between form certain stress and keep then cutting off the waste and old Thin cable for forming pencil section by section not less than time for 24 hours, obtaining To short and small waste and old Thin cable, then separate plastic cord skin with metal core using the centrifugal force of centrifuge, Ji Kefen Not Huo get plastic cord skin and metal core and realize the recovery processing to waste and old Thin cable.

Further, in order to improve the stress between plastic cord skin and metal core, in step (1), first to waste fine Cable is preheated, and preheating temperature is 40~45 DEG C, then winds bunchy again；In this way, metal wire wicking expands simultaneously after receiving heat Squeeze plastic cord skin, bunchy to be spooled and stand cooling after so that plastic cord skin is maintained at biggish accommodating amount, to improve The easy degree that centrifuge separation stage metal core is detached from from plastic cord skin.

Further, metal core is detached from plastic cord skin in order to easier, in step (2), will first cut The waste and old Thin cable having no progeny is immersed into 10~20min of immersion treatment in cleaning solution, then filters out waste and old Thin cable and is transferred to centrifugation It is centrifuged in machine.During immersion treatment, cleaning solution can not only penetrate into the adjacent boundary of metal core Yu plastic cord skin At face, reduce the frictional force of the two, improves the easy degree that metal core is detached from；After cleaning solution impregnates waste fine cable surface It removes its surface contaminants during centrifugation, reduces the subsequent processing difficulty to plastic cord skin.It, will be waste and old in the present invention Purpose in Thin cable submergence cleaning solution is dropped using the cleaning solution of partial penetration to metal core and plastic cord skin critical part Low-frictional force, therefore, the cleaning solution for filtering out waste and old Thin cable can be reused, and use cost is low.

In the present invention, the cleaning solution is the clear water containing 2.0~5.5wt% surfactant.Surfactant Effect is reduction surface free energy, and the present invention does not do particular determination, example table as mentioned to the type of the surfactant Face activating agent is one of anionic surfactant, cationic surfactant or nonionic surfactant；Specifically, Lauryl sodium sulfate, neopelex, bis- (2- ethylhexyl) ambers may be selected in the anionic surfactant One of amber disulfonate acid；Cetyl trimethylammonium bromide may be selected in the cationic surfactant；Described is non- Polyethylene glycol, OP -10, Span20, Span80, Tween20, Tween60, Tween80, epoxy may be selected in ionic surface active agent Ethylene-propylene oxide-oxireme block copolymer.

According to the present invention, in step (1), the bundles of diameter of waste fine cable winding institute to plastic cord skin and metal core it Between stress formation and it is subsequent truncation obtain the waste and old Thin cable of limit length easy degree have an impact；Specifically, if winding Bundles of diameter is excessive, and there are difficulty for winding, also, is not easy to obtain shorter waste and old Thin cable in truncation, thus cause from The difficulty that plastic cord skin is separated with metal core when the heart becomes larger；And it is too small to wind bundles of diameter, although be easy truncation obtain compared with Short waste and old Thin cable, but the processing capacity of waste and old Thin cable is deteriorated.Preferably, in the present invention, the waste fine electricity The diameter that cable winds formed beam is 3~8cm.

In the present invention, the centrifuge uses decanter centrifuge, and in the specific course of work, rotary drum and spiral are with one Determine the rotation of differential same-directional high-speed, through truncation without departing from plastic cord skin and metal core conveying is continuously introduced by feed pipe Spiral inner cylinder enters rotary drum after acceleration, under the action of centrifugal force field, heavier metal core, which is deposited on to be formed on rotatory drum wall, to sink The metal core of deposition is continuously pushed into rotary drum tapered end by slag blanket, conveying spiral, through slag-drip opening discharge machine outside；Lighter modeling Stockline skin then forms internal layer pendular ring, has rotary drum big end overflow port continuously to overflow rotary drum, is discharged through discharge gate.Traditional sleeping spiral shell centrifugation Machine is used for the separation of solid-liquid, and the creative waste and old Thin cable by after truncation is put into decanter centrifuge in the present invention, is obtained Obtained good separating effect.Further, in the present invention, the revolving speed of the decanter centrifuge is 1500~2500r/min.

According to the present invention, metal core is not contained in isolated plastic cord skin in order to further ensure that, described returns Receiving method further includes further being sorted using electrostatic separator to the plastic cord skin obtained in step (2), rejecting does not remove metal The plastic cord skin of core.

Compared with prior art, the present invention has following technical effect that

The recovery method of waste and old Thin cable provided by the invention, by that can not only make waste fine cable winding bunchy Certain stress is formed between its plastic cord skin and metal core, so that the critical part of plastic cord skin and metal core is formed centainly Space and the separation that both facilitates, moreover, the bundles of waste and old Thin cable of winding facilitates truncation to form short and small waste and old Thin cable； Plastic cord skin is separated with metal core using the centrifugal force of centrifuge, can obtain plastic cord skin and metal core respectively And realize the recovery processing to waste and old Thin cable.

The recovery method of waste and old Thin cable provided by the invention, which solves traditional peeling equipment, can not be suitable for Thin cable Peeling；The method and step of use is simple and convenient, and processing cost is low, solves the complete powder of waste and old cable using mechanical crushing method Broken bring difficulty is big, the high drawback of energy consumption；Or the drawback high using freezing processing cost, reduce returning for waste and old Thin cable Receive processing difficulty, by present invention recovery processing obtain plastic cord skin is cleaned, be dried after can directly blanking to extruder In melted, or be granulated and be modified, or be added in virgin material directly as returns and use, it is simple and convenient.

Other features and advantages of the present invention will be described in detail in subsequent specific embodiment.

Specific embodiment

In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below Specific embodiment is closed, the present invention is furture elucidated.

The present invention provides a kind of recovery methods of waste and old Thin cable, comprising the following steps:

(1) it by waste fine cable winding bunchy and stands not less than for 24 hours；

(2) it is cut off section by section to winding bundles of waste and old Thin cable, the waste and old Thin cable after being truncated, then by its turn Enter to make in centrifuge plastic cord skin to separate with metal core；

Wherein, the length of the waste and old Thin cable after truncation is less than 0.5cm.

The present invention does not do particular determination to by the bundles of method of waste fine cable winding, such as can be by the way of manual By waste fine cable winding bunchy and fixed standing is not less than the time for 24 hours, applies during winding to waste and old Thin cable Torsion makes to form stress between plastic cord skin and metal core；Or screw rod rotation is driven using driving source (such as servo motor), so Waste and old Thin cable is wound on screw rod afterwards, can so form longer beam, also, based on larger torsion possessed by driving source Square, the stress between plastic cord skin and metal core are bigger.Then the waste and old Thin cable after standing is truncated, forms short and small give up Then old Thin cable is transferred in centrifuge and plastic cord skin is separated with metal core.

It is made further below by way of recovery method of the specific embodiment to waste and old Thin cable provided by the invention It is bright