What you need to know?�� “be aware of the source of metals, understand how they are processed for use, and how they can be reused, recycled or disposed of, and the environmental consequences of their use”�
METALS WHERE DO THEY COME FROM
Where do metals come from?
Metal is mined from the ground as a metal ore. �They are processed and refined to make metals. �The process is often like this:
The process is not the same for all metals, but it is often like this.�Steel Being Made�
1
Crushing—ore is crushed and heated with other materials in a blast furnace, separating the metal from the other substances in the ore. The metal is removed from the blast furnace as molten metal.
2
Pouring—the molten metal is poured into as casting machine where it’s cooled and run through rollers to make varies different shapes, (stock forms)
3
Refining—the molten metal from the blast furnace still has some impurities and for some metals it still needs to be refined to remove these impurities.
METALS WHERE DO THEY COME FROM
How does mining metals harm the environment?�
METALS WHERE DO THEY COME FROM
3
Transportation—transporting great truckloads of metal ore �also causes air and noise pollution.
1
Disfigures—Digging up metals disfigures the landscape.
2
Pollution—processing and refining metals causes pollution – �the chemicals used can be harmful, especially if they get into �water sources.
4
Disposal—metal products are often disposed of in landfill�sites – more metal will need to be extracted from the ground.�Instead we could recycle or reuse metals.
METALS WHERE DO THEY COME FROM PLENERY
4
Disposal—metal products are often disposed of in land fill sites.
�� What you need to know? �“be aware of the source of metals, understand how they are processed for use, and how they can be reused, recycled or disposed of, and the environmental consequences of their use”�
Where do metals come from?
1
Crushing—ore is crushed and heated.
2
Pouring—the molten metal is poured, cooled and run through rollers to make shapes.
3
Refining—heated in a blast furnace to remove these impurities.
Metal is mined from the ground as metal ore.
How do metals harm the environment?
1
Disfigures—digging up metals disfigures the landscape.
2
Pollution—processing and refining metals causes pollution.
3
Transportation—transporting causes air and noise pollution.