What is the major role of fluorospar (CaF2) which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite?
the major role of fluorospar is to lower the temperature of the melt.
Which method of metal refining is generally used when a metal of high degree of purity is needed?
Ultra pure silicon is needed by electronic industry. By which method of refining, such a high purity silicon is obtained?