metal recycling

Metal bales: open first or feed directly into the shredder?

The density of the briquettes, the bundling method and the unknown contents inside determine the risk of feeding. Checking and loosening the bales first is often more reliable than forcing a bite.

Scrap metal briquettes awaiting further processing
Scrap metal briquettes awaiting further processing

The metal briquette has a neat appearance but hides internal materials and foreign matter. Compaction density, strapping and single block weight are different, and direct feeding may exceed the bite allowed by the equipment or cause sudden load changes.

Material characteristics

  • Light iron sheets, aluminum products, copper-aluminum mixtures and briquettes have obvious differences in strength, thickness, shape and packing density.
  • Long bars, wires and strips can easily become tangled, and closed containers, wetted parts and superhardware can present safety or equipment risks.
  • Volume reduction, furnace front material and sorting material have different requirements on the degree of dissociation, discharge size and proportion of fine materials.

Key processing challenges

  • There may be heavy parts, sealed parts or non-metallic debris inside.
  • High-density briquettes have a large contact area and are difficult to bite in initially.
  • After the strapping tape is loose, it is easy to wrap around the conveyor or the cutter shaft.

Equipment-selection criteria

  • Check tools, axis systems, drives and permitted processing boundaries against maximum thickness, cross-section, piece weight and material grade.
  • Determine whether to configure screening, magnetic separation, eddy current and manual quality inspection based on the volume reduction or sorting goals.
  • Incorporate inspection of sealing parts, removal of super-hard foreign objects, fire protection and maintenance spaces into the entire line plan.

Typical process flow

The briquettes are first weighed and inspected and unpacked or loosened if necessary. Qualified materials enter magnetic separation and non-ferrous metal sorting after heavy-duty transportation and crushing. Overweight items should be dealt with separately.

Information required before project evaluation

Complete information helps us define equipment limits, test plans and the full line accurately:

  • Types and proportions of ferrous and non-ferrous metals
  • Maximum dimensions, thickness, weight and bulk density
  • Plastic, rubber, sediment and liquid impurities
  • Sealed containers, steel wire and ultra-hardware situations
  • Target discharge, sorting method and downstream use
  • Throughput, loading, power and safety conditions