Recycling non-ferrous metals

Pages137-144
137
10. Recycling non-ferrous metals
Recycling non-ferrous metals
10.1. General treatment
10.1.1. Non-ferrous metals are recycled from factory
offcuts (new scrap), from obsolete/salvaged sources (old
scrap) and from foundry slag, ashes and dross. The range of
processes used to reclaim metals from scrap depends on the
donor source and the desired product. Recycling non-
ferrous metals involves different processes from those used
in the production of primary metal and presents different
occupational safety and health hazards and risks. The fol-
lowing special provisions apply.
10.1.2. Bales of raw scrap received for recycling should
be opened and physically inspected prior to adding them to
the melt. Potential hazards include rainwater, gas cylinders,
aerosols, and munitions as well as radioactive-contaminated
scrap. Reputable suppliers of scrap should be used to ensure
that the specification of raw materials meets these criteria.
10.1.3. Charge materials should be stored under cover
wherever possible.
10.1.4. Potential carriers of moisture should be pre-
heated to dry them before charging.
10.1.5. Tubes and pipes that are closed at one or both
ends should not be charged.
10.1.6. Bins for storing scrap metal should have holes
in their base to facilitate drainage.
10.1.7. Corroded material should not be added to in-
duction furnaces.
10.1.8. The risk from radioactive sources is dealt with
in section 5.2.4.

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