Metal Shredders
Metal Shredders
and Crushers
for Efficient
Scrap Recycling
Metal Shredders
for Different Material Streams
Scrap streams vary considerably in dimensions, density, composition and contamination. A machine designed to open compressed vehicle bodies therefore performs a different task from a heavy-duty car shredder or a compact crusher for electronic scrap and metal turnings.
LINDEMANN combines these applications within one size-reduction portfolio. Operators can select a pre-shredder to condition difficult material, a high-capacity main shredder for large mixed scrap volumes or a specialised crusher for defined industrial scrap streams.
This makes it possible to configure the shredding process around the material rather than forcing fundamentally different scrap grades through the same machine concept.
How Metal Shredders and Crushers Work
Scrap is introduced through a hopper, conveyor, feed chute or hydraulic feeding system, depending on the machine.
Bulky and compacted material can first be opened by a pre-shredder. This creates a more homogeneous feed stream, releases trapped dirt and contaminants and provides more stable loading conditions for the main shredder.
Selected heavy-duty shredders use hydraulic feed rollers or an optional Feed Optimizer to pre-compress bulky material and maintain a consistent flow towards the rotor.
The actual size-reduction principle depends on the application.
Slow-running, counter-rotating rotors use application-specific tearing teeth to open dense scrap in a controlled process. Heavy-duty shredders use powerful rotors, hammers and anvils to break down vehicles, mixed scrap and steel structures. Compact machines and turnings crushers use high-speed rotors to reduce smaller materials into defined, manageable fractions.
The appropriate rotor speed, tool configuration and grate system are selected according to the material and required output.
Grates and screen systems control the size of the discharged material on selected machines. Interchangeable grates can also be used to adapt metal chip size and density for processes such as briquetting.
Hydraulic ejection doors and coarse-parts discharge systems remove objects that cannot be shredded. This protects important components and helps maintain production flow without unnecessary interruptions.
Shredding reduces material size and exposes connected materials so they can be separated more effectively.
After size reduction, ferrous metals can be recovered through magnetic separation, while air classification removes light materials. Additional processing of Shredder Heavy Fraction and Shredder Light Fraction can recover non-ferrous metals and increase the value and purity of the final products.
Complete plants can also incorporate air-treatment systems, quality-control stages and digital performance monitoring.
Materials Processed by Metal Shredders
LINDEMANN shredders and crushers can be configured for materials including:
- End-of-life vehicles and car bodies
- Compressed vehicle packages
- Scrap metal bales
- Light and heavy mixed scrap
- Sheet metal
- Steel profiles and structural components
- Pipes and bars
- White goods and household appliances
- Aluminium scrap
- Steel scrap
- Production waste
- Small industrial scrap
- Electronic scrap
- Electric motors and engines
- Incinerator residues
- Carbon-steel turnings
- Stainless and chromium-nickel steel turnings
- Aluminium turnings
- Long, curly and tangled metal chips
The appropriate machine depends on the material dimensions, density, contamination, composition, required output size and desired processing capacity.
