MetallurgyMedium
Question
The major role of fluorspar (CaF2) which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolity (Na3 AlF6), is :
Options
A.as a catalyst
B.to make the fused mixture very conducting
C.to in crease the temperature of the melt
D.to decrease the rate of oxidation of carbon at the anode
Solution
Cryolite reduces the melting point of Al2O3 and makse the fused mixture more conducting.
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