Method for recycling metal and plastics from waste plastics containing metal cladding materials

Abstract

The invention provides a method for recycling metal and plastics from waste plastics containing metal cladding materials. The method comprises the steps that firstly, the waste plastics containing themetal cladding materials are crushed, 2*2 cm plastic sheets are obtained, and the plastic sheets are soaked in a trichloromethane solution to be processed for 24 hours; the plastic sheets and steel balls are added into a vertical stirring ball mill to be subjected to vacuum ball mill treatment for 20-40 min, and metal cladding materials and stripped plastic sheets are obtained after screening; the metal cladding materials separated from the plastics are further subjected to grinding treatment, copper, nickel and chromium mixed metal powder is obtained, nickel is sucked out through a magnet, and the nickel and the copper and chromium mixed metal powder are obtained separately; and the copper and chromium mixed metal powder is added into diluted hydrochloric acid to react, chromium is dissolved to enter a solution to be converted into a chromium trichloride solution, and copper powder is obtained after filtering. The use device is simple, the recycling process is short in procedure, thecost is low, and industrial production is hopeful to achieve.

Description

Technical field:

[0001] The invention belongs to the field of secondary resource recovery and utilization, and in particular relates to a method for recovering metal and plastic from waste plastics containing metal plating. technical background:

[0002] At present, under the premise that the country vigorously promotes the development of circular economy and clean production, more and more attention has been paid to the recycling of metal and plastic in waste plastics containing metal coatings. The metal coatings of waste plastics that usually contain metal coatings are copper, nickel, and chromium coatings.

[0003] Patent CN101476041 discloses a method for separating and recovering copper, nickel and recycled plastics from waste electroplating plastics. After crushing waste electroplating plastics with a crusher, nitric acid is used to dissolve metals such as copper and nickel on the surface, and the insolubles are filtered and washed to obtain pure Plastic; the solution...

Examples

Embodiment 1

[0024] Crushing waste plastics containing metal plating to obtain 2×2cm plastic pieces, soaking the plastic pieces in chloroform solution for 24 hours; adding 0.8Kg of plastic pieces and 1Kg of steel balls with a diameter of 30mm into a vertical stirring ball mill In the process, the whole ball mill is in a vacuum state, the system pressure is not higher than 1KPa, the rotating speed of the ball mill is 300r / min, and the ball milling process is 20-40min. The metal coating on the surface of the plastic sheet is separated from the plastic under the action of ball milling, and the metal in the metal coating is For copper, nickel and chromium, sieve to obtain metal coating and stripped plastic sheet; further grind the metal coating detached from plastic to obtain copper, nickel and chromium mixed metal powder with a particle size range of 200 mesh, and use a magnet to separate the metal The nickel is sucked out to obtain nickel, copper and chromium mixed metal powder respectively; ...

Technical field:

[0001] The invention belongs to the field of secondary resource recovery and utilization, and in particular relates to a method for recovering metal and plastic from waste plastics containing metal plating. technical background:

[0002] At present, under the premise that the country vigorously promotes the development of circular economy and clean production, more and more attention has been paid to the recycling of metal and plastic in waste plastics containing metal coatings. The metal coatings of waste plastics that usually contain metal coatings are copper, nickel, and chromium coatings.

[0003] Patent CN101476041 discloses a method for separating and recovering copper, nickel and recycled plastics from waste electroplating plastics. After crushing waste electroplating plastics with a crusher, nitric acid is used to dissolve metals such as copper and nickel on the surface, and the insolubles are filtered and washed to obtain pure Plastic; the solution...

Examples

Embodiment 1

[0024] Crushing waste plastics containing metal plating to obtain 2×2cm plastic pieces, soaking the plastic pieces in chloroform solution for 24 hours; adding 0.8Kg of plastic pieces and 1Kg of steel balls with a diameter of 30mm into a vertical stirring ball mill In the process, the whole ball mill is in a vacuum state, the system pressure is not higher than 1KPa, the rotating speed of the ball mill is 300r / min, and the ball milling process is 20-40min. The metal coating on the surface of the plastic sheet is separated from the plastic under the action of ball milling, and the metal in the metal coating is For copper, nickel and chromium, sieve to obtain metal coating and stripped plastic sheet; further grind the metal coating detached from plastic to obtain copper, nickel and chromium mixed metal powder with a particle size range of 200 mesh, and use a magnet to separate the metal The nickel is sucked out to obtain nickel, copper and chromium mixed metal powder respectively; ...

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