aluminium Extraction Flashcards
1
Q
describe hallucinations-Héron process
A
1) alumina is dissolved in cryolite
2) electrolysis is used
2
Q
why is cryolite used?
A
Lower melting point of alumina who melting point is over 2000°C
3
Q
What type of material are the electrodes made from?
A
graphite
4
Q
What is wrong with using a graphite electrode?
A
it reacts with oxygen and produces carbon dioxide gas so it needs to be replaced
