Metal Extraction Flashcards
1
Q
5 methods of extraction
A
carbon reduction, electrolysis, metal displacement, phytomining, bioleaching
2
Q
carbon reduction
A
carbon is more reactive than metal, displacement, metal is reduced, gold to zinc
3
Q
electrolysis
A
metal is dissolved in water or melted, electricity breaks up a compound into elements, carbon less reactive than metal
4
Q
metal displacement
A
metal displaces a less reactive metal from its compound
5
Q
phytomining
A
roots take in metal ions, producing metal oxides, harvested and burnt, sulphuric treats ash producing copper sulphate solution OR ash is heated with carbon producing copper, low grade ores
6
Q
bioleaching
A
bacteria feed on low grade ores, copper sulphate solution produced, electrolysis or displaced extracts copper
