The function of fluorspar (CaF_2) in the elec | vedclass

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(B) In the Hall-Heroult process,pure alumina $(Al_2O_3)$ has a very high melting point $(2050 \ ^\circ C)$ and is a poor conductor of electricity. To

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to lower the melting point of the mixture and to make the fused mixture more conducting

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(B) In the Hall-Heroult process,pure alumina $(Al_2O_3)$ has a very high melting point $(2050 \ ^\circ C)$ and is a poor conductor of electricity. To overcome these issues,it is dissolved in molten cryolite $(Na_3AlF_6)$. Fluorspar $(CaF_2)$ is added to the mixture to lower the melting point of the electrolyte further and to increase the electrical conductivity of the melt,which facilitates the electrolytic reduction process.

The function of fluorspar $(CaF_2)$ in the electrolytic reduction of alumina $(Al_2O_3)$ dissolved in fused cryolite $(Na_3AlF_6)$ is

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