Why Aluminum-Plastic Separation Matters

Aluminum-plastic composites are everywhere — food packaging, cigarette foil, pharmaceutical blister packs, toothpaste tubes, and decorative panels. The aluminum layer is extremely pure and valuable, while the plastic component is also recoverable. Separating the two turns waste into two revenue streams.

Chemical separation methods once dominated but have been phased out due to high cost, complex processing, environmental pollution, and health hazards. Physical dry separation is now the standard — lower cost, simpler operation, and zero effluent.

Wanrooe Dry Physical Separation

Wanrooe aluminum-plastic separation equipment uses a fully dry physical process — no water, no chemicals, no emissions. The system crushes composite material, sizes it uniformly, then separates aluminum from plastic using electrostatic and gravity-based methods. Both fractions are recovered in saleable form.

The process of separating aluminum from plastics by the aluminum plastic separation equipment is as follows:
1. Crushing

A crusher breaks aluminum-plastic composites into small pieces or powder. Smaller particle size improves liberation of the two materials and increases separation efficiency in downstream steps. Output size is adjustable based on feed material and target separation purity.

2. Screening

Vibratory screens classify crushed material by particle size. Uniform sizing is critical — oversized particles retain bonded aluminum and plastic, while undersized fines reduce electrostatic separation efficiency. Only the correctly sized fraction proceeds to sorting.

3. Electrostatic Separation

This is the core separation step. Charged electrodes create an electrostatic field. Conductive aluminum particles are attracted to one electrode and collected in one stream; non-conductive plastic particles are repelled and collected separately. Purity rates of 95%+ are achievable in a single pass for well-prepared feed material.

4. Gravity and Airflow Refinement

Electrostatic output may still contain minor cross-contamination. Gravity tables and air classifiers provide secondary polishing:

Gravity sorting — Vibrating decks exploit density differences; heavier aluminum settles while lighter plastic rides the surface

Airflow sorting — Vertical air streams separate by terminal velocity; aluminum falls straight while plastic is carried away

Combined, these steps push final purity to 98% or higher for both aluminum and plastic fractions.

System Benefits

Zero pollution — Integrated dust collection prevents airborne particle release

Low operating cost — No chemicals, minimal water, low energy per ton

Simple operation — Automated controls with minimal labor

Dual revenue — Both aluminum and plastic fractions are marketable

Related machinery

Waste aluminum plastic crusher

FAQ: Aluminum-Plastic Separation

What types of aluminum-plastic composite can be processed?

Common feedstocks include aseptic cartons (Tetra Pak), blister packs, foil-lined snack bags, toothpaste tubes, and decorative composite panels. Material must be dry and free of heavy contamination.

What purity can I expect?

95–98% purity for both aluminum and plastic fractions is typical with proper crushing, screening, and two-stage separation. Higher purity requires finer crushing and additional electrostatic passes.

Can I process mixed plastics with aluminum?

Yes, but separation efficiency drops. Pure PE or PP layers separate cleanly from aluminum. Mixed multi-layer plastics may require adjusted electrostatic settings and may yield lower-grade plastic output.