Question

what is in used when gangue contains acidic silica as impurity?​

Answer 1

Answer:

Acidic flux : These flux are those which comes from substances like Lewis acid such H

3

PO

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.