Non Ferrous Metal Sorting Line Working Process
1. Material Evaluation and Preparation
The feed material should be evaluated before processing. Material composition, maximum dimensions, particle-size distribution, moisture, contamination and target recovered fractions determine the required equipment configuration.
2. Optional Size Reduction
Bulky or tangled material may require primary shredding. Material requiring further liberation or smaller output may be processed by a suitable crusher.
Size reduction is optional. Material that already meets the required particle-size and liberation conditions may enter the screening and separation stages directly.
3. Screening and Material Spreading
Screening separates oversized, undersized and fine material fractions. A vibrating feeder or material spreading unit distributes the feed into a more uniform layer before magnetic and non-ferrous separation.
4. Ferrous Metal Removal
The prepared material passes through magnetic separation to remove iron, steel and other exposed ferrous components. Effective ferrous removal helps protect downstream sorting equipment and improves the stability of subsequent separation.
5. Eddy Current Separation
The remaining non-magnetic material passes through an eddy current separator. Conductive non-ferrous metals follow a different discharge trajectory from non-conductive materials such as plastic, rubber and glass.
Separation performance depends on conductivity, density, particle size, shape, moisture, feeding thickness, belt speed, magnetic rotor configuration and splitter adjustment.
6. Optional Light-Material Separation
Airflow sorting may be used to remove plastic film, foam, dust and other lightweight impurities when sufficient density and aerodynamic differences exist between the materials.
7. Optional Metal Grade Separation
When aluminum, copper, zinc, brass or stainless steel must be collected as separate products, additional density separation, sensor-based sorting, color sorting, X-ray sorting or manual sorting may be required.
8. Material Collection and Line Control
The recovered fractions are transferred to separate collection areas. A PLC control system coordinates the feeding, conveying, screening and sorting equipment and helps reduce material accumulation between processing stages.
