Question

What are acidic and basic flux?

Answer 1

Acidic flux : These flux are those which comes from substances like Lewis acid such $H_{3}P{O}_4$, $HCl$ etc. They are used in welding or extractive impurities such as lime ($CaO$) or $MgO$.

Basic flux: It is similar to acidic flux but the only difference is that we take basic substances like $CaO$ for welding process or extractive metallurgy. Basic fluxes like lime ($CaO$) or $MgO$ are used to remove acidic gangue such as Silica.