Ores Flashcards by Andi Searle | Brainscape

Q

Ore

A

A rock which contains metal

Found in the earth’s crust

Mined

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Q

Smelting

A

The process of extracting metal from ore

Blast furnace or reduction cell

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Q

Aluminium

A

Bauxite

Australia and New Guinea

Earth’s 3rd most abundant element (after oxygen and silicon)

Often found in tropical rainforests

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Q

Aluminium smelting

A

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Q

Reduction cell

Aluminium smelting

A

Bauxite chemically processed to form alumina

Mixed with cryolite

Pure aluminium settles at the bottom

Huge amounts of energy used

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Q

Iron smelting

A

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Q

Blast furnace

Iron smelting

A

Air blasted at 1700°C

Ore, coke and limestone heated

Leaves pure molten iron

Burns huge amount of fossil fuels

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Q

Surface mining

A

Stripping away earth

Large excavation equipment

Leaves scars on landscape

Uses lots of fuel

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Q

Underground mining

A

Digging deep underground tunnels

Ground blasted with explosives

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Q

Old mines

A

Leave surface unstable

Lead to subsidence - ground shifts down

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Q

Steel

A

Hematite

Brazil, Australia and Africa

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