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...

AI Technical Summary

Problems solved by technology

[0005] The above methods all use acid to dissolve the metal, and then use extractant or other chemical methods to recover separately. The main problems are long recovery process, high treatment cost, and a large amount of waste acid and waste liquid that need to be treated, which has hidden dangers of secondary pollution.

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