
Motor Rotor Crushing and Separation Process
Motor Dismantling and Material Preparation
Complete motors should be dismantled before crushing. Motor housings, bearings, long shafts, lubricating oil, capacitors, electrical accessories and other easily removable components should be separated according to the selected recycling process.
The intended feed material is a prepared rotor, stator section or copper-iron composite component that meets the feeding limits of the selected crusher.
Controlled Feeding
Prepared motor rotor and stator material is transferred into the crushing chamber by a conveyor or suitable loading device. The feeding rate should match the material dimensions, individual weight and crusher load.
Large shafts, thick steel components and oversized motor parts require dismantling, hydraulic breaking or another preparation method before crushing.
Crushing and Material Liberation
A high-speed rotor drives the crushing components to repeatedly impact, deform and break the prepared motor material. The process reduces the material size and helps release copper windings, aluminum conductors and ferrous core components.
The degree of material liberation depends on the rotor or stator structure, conductor type, output size, crusher configuration and number of processing passes.
Screen-Controlled Discharge
When the crusher includes a screen or grate, material that meets the selected opening is discharged from the crushing chamber, while oversized pieces remain inside for further processing.
Actual output depends on the incoming component structure, screen opening, crushing configuration and feeding conditions.
Magnetic Separation
After crushing, magnetic separation can recover liberated iron and steel from the processed material. Copper and aluminum components that remain attached to iron may report to the ferrous fraction.
Effective material liberation is therefore important before magnetic separation.
Screening and Material Classification
Screening can divide the crushed mixture into different particle-size fractions and remove excessive fine material. Separating narrower particle-size ranges may improve the stability of subsequent sorting equipment.
Copper and Aluminum Recovery
Copper and aluminum are both conductive non-ferrous metals. Eddy current separation may recover conductive metal particles from suitable non-conductive residues, but it does not normally separate copper from aluminum as two high-purity products.
Density separation, sensor-based sorting or manual sorting may be required when separate copper and aluminum fractions are expected.
Dust Collection
Dust collection can be configured around the crusher, screening equipment and conveyor transfer points according to the insulation material, coating, contamination level and workshop requirements.
Material Collection
Ferrous material, copper-containing fractions, aluminum-containing fractions and residual material are transferred to separate collection areas according to the selected sorting process.