MetallurgyMedium
Question
In metallurgical processes the flux used for removing acidic impurities is :
Options
A.silica
B.sodium chloride
C.lime stone
D.sodium carbonate.
Solution
Basic flux is used. It is a basic oxide (i.e., oxide of a metal) like CaO (obtained from lime stone,CaCO3), MgO (from magnesite, MgCO3), haematite (Fe2O3) etc. It is used to remove the acidic impurity like SiO2, P2O5 etc. The basic flux combines with the acidic impurity and forms a slag.
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