Shredder: A hammer mill removes contaminants from the scrap and separates composite materials into their individual components. The contaminants include non-ferrous metals, wood and plastic.
Scrap shears: Once the extraneous materials have been removed the scrap shears cut the iron into pieces of the right size for smelting.
Household scrap (clothes airers, bicycles, washing machines, electric appliances, etc.), production waste from metalworking factories, and old cars.