Metal
Metals make up a significant portion of recycled material in the UK, with most kinds of metal able to be used again, although with varying quality. Some metals are recycled more than others, aluminium and steel being the most common.
Aluminium recycling is one of the most well-known and visible forms of recycling in the UK: around 72 per cent of the 9 billion aluminium cans used in the UK every year are recycled annually. One tonne of recycled aluminium saves the amount of carbon dioxide (or equivalent) emissions produced by driving 27,000 miles.
The most common use for recycled aluminium is to make packaging, especially cans, for the food and drink industry, but it can also be used for household items and vehicles like bikes or cars.
Steel is 100 per cent recyclable and widely recycled in the UK; steel recycled in the building and demolition sector reached 92 per cent in 2012, while over 2.5 billion steel cans are recycled every year.
Vehicles, domestic appliance components, heavy machinery and construction materials are all possible destinations for recycled steel.
Metals are collected from the kerbside and can banks before being taken to be shredded and melted down into large ingots, which are then rolled into long sheets for onward processing. It is important to make sure all metal is free from contamination to ensure that the recycled material gets turned into a shiny, new product.
You can learn more about how to recycle metal food tins and drinks cans on the Wales Recycles website.
Recycling process
Cans and tins are separated from other materials, if necessary. Magnets are used to separate steel cans and tins from aluminium ones
The separated items are baled
Bales of cans are shredded into small pieces
Shreds are ‘de-coated’. This means the painted decorations are removed by blowing hot air through the shreds
The small pieces are fed into a furnace
The liquid metal is poured and continuously cooled by water
An ‘ingot’ is formed
‘Ingots’ are rolled into thin sheets, which create new drinks cans that can be back on sale in just eight weeks
Cans and tins are separated from other materials, if necessary. Magnets are used to separate steel cans and tins from aluminium ones
Steel cans and tins – which are made from tin-coated steel – are usually melted alongside other steel scrap metal, like automotive scrap from cars and other vehicles
Liquid steel is formed into ‘slabs’
Steel slabs create sheets, which become new tins