Magnetic walls.
Tantalum powder.
Copper concentrate.
Drained lead acid battery scrap.
Mercury.
Tantalum or coltan.
Rare earth metal cerium.
Power transformer, conductors, isolators,busbars, lightning arrestors, circuit breakers, relays, capacitor banks, batteries.
Coal, copper cathode, copper concentrate, iron ore, chrome ore, scrap paper, scrap copper wire.
Iron mill scale.
Steel drums.
Aluminum scrap.
Copper granules.
Copper cathodes.
Aluminum ingots.
Steel shots.
Copper cathode.
Copper cathodes.
Nickel wires.
Copper cathodes.