Because there is no need for refrigeration in the
transport and storage of steel food cans, less energy is used than with frozen foods and the many fresh foods that must be kept refrigerated.Using old steel cans to make new steel also preserves Malaysia's energy and resources. For every tonne of steel scrap recycled, around 1.5 tonnes of iron ore, one tonne of coke and half a tonne of limestone are saved in the production of a tonne of steel.
Melting down one tonne of recycled steel cans uses only 25% of the energy needed to melt enough ingredients to make one tonne of all-new steel.
Around 80% of the energy required by the steel plant comes in the form of gas recovered from the coke ovens and blast furnace operations.
BHP has spent $300 million upgrading its tinplate manufacturing facilities at Port Kembla steelworks. Water is being reused within the plant, collection and treatment of air emissions has been improved and disposal of waste products is being minimised by recycling and reuse.