What is the role of the following compounds : (a) `CaF_(2)` in the metallurgy of aluminium ? (b) `SiO_(2)` in the extraction of copper from copper pyr
What is the role of the following compounds :
(a) `CaF_(2)` in the metallurgy of aluminium ?
(b) `SiO_(2)` in the extraction of copper from copper pyrites ?
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(a) Makes alumina a good conductor of electricity and lowers, the fusion temperature.
(b) Iron oxide combines with Silica `(SiO_(2))` and is removed as slag.
`FeO+SiO_(2) rarr FeSiO_(3) ` (Slag)
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