Question

2. What is the importance of cryolite and fluorspar in the extraction of aluminium.​

Answer 1

Fluorspar (CaF2) is added in small quantity in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6). Addition of cryolite and fluorspar increases the electrical conductivity of alumina and lowers the fusion temperature to around 1140 K.

Answer 2

$\huge{\purple{\boxed{\red{\boxed{\mathfrak{Answer}}}}}}$

Fluorspar (CaF2) is added in small quantity in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6). Addition of cryolite and fluorspar increases the electrical conductivity of alumina and lowers the fusion temperature to around 1140 K.

Fluorspar (CaF2) is added in small quantity in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6). Addition of cryolite and fluorspar increases the electrical conductivity of alumina and lowers the fusion temperature to around 1140 K.

Instead, it is dissolved in molten cryolite – an aluminium compound with a lower melting point than aluminium oxide. The use of molten cryolite as a solvent reduces some of the energy costs involved in extracting aluminium by allowing the ions in aluminium oxide to move freely at a lower temperature.